[56da40e] | 1 | // |
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| 2 | // gla-gl.cc |
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| 3 | // |
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| 4 | // OpenGL implementation for the GLA abstraction layer. |
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| 5 | // |
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[f4c5932] | 6 | // Copyright (C) 2002-2003,2005 Mark R. Shinwell |
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[1c55fb5] | 7 | // Copyright (C) 2003,2004,2005,2006,2007,2010,2011,2012,2013,2014,2015 Olly Betts |
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[56da40e] | 8 | // |
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| 9 | // This program is free software; you can redistribute it and/or modify |
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| 10 | // it under the terms of the GNU General Public License as published by |
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| 11 | // the Free Software Foundation; either version 2 of the License, or |
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| 12 | // (at your option) any later version. |
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| 13 | // |
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| 14 | // This program is distributed in the hope that it will be useful, |
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| 15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | // GNU General Public License for more details. |
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| 18 | // |
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| 19 | // You should have received a copy of the GNU General Public License |
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| 20 | // along with this program; if not, write to the Free Software |
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[ecbc6c18] | 21 | // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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[56da40e] | 22 | // |
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| 23 | |
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[cbfa50d] | 24 | #ifdef HAVE_CONFIG_H |
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| 25 | #include <config.h> |
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| 26 | #endif |
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| 27 | |
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[bd551c0] | 28 | #include <wx/confbase.h> |
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[ee41e88] | 29 | #include <wx/image.h> |
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[bd551c0] | 30 | |
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[87cab10] | 31 | #include <algorithm> |
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| 32 | |
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[78924eb] | 33 | #include "aven.h" |
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[56da40e] | 34 | #include "gla.h" |
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[bd551c0] | 35 | #include "message.h" |
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[e577f89] | 36 | #include "useful.h" |
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[1eeb55a] | 37 | |
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[ee63994] | 38 | #ifdef HAVE_GL_GL_H |
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| 39 | # include <GL/gl.h> |
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| 40 | #elif defined HAVE_OPENGL_GL_H |
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| 41 | # include <OpenGL/gl.h> |
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| 42 | #endif |
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| 43 | |
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[de4b099] | 44 | #ifdef HAVE_GL_GLEXT_H |
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| 45 | # include <GL/glext.h> |
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| 46 | #elif defined HAVE_OPENGL_GLEXT_H |
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[ee63994] | 47 | # include <OpenGL/glext.h> |
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[b72f4b5] | 48 | #endif |
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[f960f23] | 49 | |
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[b05f516] | 50 | #ifndef GL_POINT_SIZE_MAX |
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| 51 | #define GL_POINT_SIZE_MAX 0x8127 |
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| 52 | #endif |
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[9baa53a] | 53 | #ifndef GL_POINT_SPRITE |
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| 54 | #define GL_POINT_SPRITE 0x8861 |
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[f960f23] | 55 | #endif |
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[9baa53a] | 56 | #ifndef GL_COORD_REPLACE |
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| 57 | #define GL_COORD_REPLACE 0x8862 |
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[f960f23] | 58 | #endif |
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[04bf822] | 59 | // GL_POINT_SIZE_RANGE is deprecated in OpenGL 1.2 and later, and replaced by |
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| 60 | // GL_SMOOTH_POINT_SIZE_RANGE. |
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| 61 | #ifndef GL_SMOOTH_POINT_SIZE_RANGE |
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| 62 | #define GL_SMOOTH_POINT_SIZE_RANGE GL_POINT_SIZE_RANGE |
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| 63 | #endif |
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| 64 | // GL_POINT_SIZE_GRANULARITY is deprecated in OpenGL 1.2 and later, and |
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| 65 | // replaced by GL_SMOOTH_POINT_SIZE_GRANULARITY. |
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| 66 | #ifndef GL_SMOOTH_POINT_SIZE_GRANULARITY |
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| 67 | #define GL_SMOOTH_POINT_SIZE_GRANULARITY GL_POINT_SIZE_GRANULARITY |
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| 68 | #endif |
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| 69 | // GL_ALIASED_POINT_SIZE_RANGE was added in OpenGL 1.2. |
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| 70 | #ifndef GL_ALIASED_POINT_SIZE_RANGE |
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| 71 | #define GL_ALIASED_POINT_SIZE_RANGE 0x846D |
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| 72 | #endif |
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[f960f23] | 73 | |
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[87cab10] | 74 | using namespace std; |
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| 75 | |
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[bde8c9a] | 76 | const int BLOB_DIAMETER = 5; |
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[4ba80e0] | 77 | |
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[edfaf35] | 78 | #define BLOB_TEXTURE \ |
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| 79 | o, o, o, o, o, o, o, o,\ |
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| 80 | o, o, o, o, o, o, o, o,\ |
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| 81 | o, o, I, I, I, o, o, o,\ |
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| 82 | o, I, I, I, I, I, o, o,\ |
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| 83 | o, I, I, I, I, I, o, o,\ |
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| 84 | o, I, I, I, I, I, o, o,\ |
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| 85 | o, o, I, I, I, o, o, o,\ |
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| 86 | o, o, o, o, o, o, o, o |
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| 87 | |
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| 88 | #define CROSS_TEXTURE \ |
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| 89 | o, o, o, o, o, o, o, o,\ |
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| 90 | I, o, o, o, o, o, I, o,\ |
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| 91 | o, I, o, o, o, I, o, o,\ |
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| 92 | o, o, I, o, I, o, o, o,\ |
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| 93 | o, o, o, I, o, o, o, o,\ |
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| 94 | o, o, I, o, I, o, o, o,\ |
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| 95 | o, I, o, o, o, I, o, o,\ |
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| 96 | I, o, o, o, o, o, I, o |
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| 97 | |
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[4f3e5d1] | 98 | static bool opengl_initialised = false; |
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| 99 | |
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[5627cbb] | 100 | string GetGLSystemDescription() |
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[cc1a1d9] | 101 | { |
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[4f3e5d1] | 102 | // If OpenGL isn't initialised we may get a SEGV from glGetString. |
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| 103 | if (!opengl_initialised) |
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| 104 | return "No OpenGL information available yet - try opening a file."; |
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[cc1a1d9] | 105 | const char *p = (const char*)glGetString(GL_VERSION); |
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[4f3e5d1] | 106 | if (!p) |
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| 107 | return "Couldn't read OpenGL version!"; |
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[cc1a1d9] | 108 | |
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[5627cbb] | 109 | string info; |
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[cc1a1d9] | 110 | info += "OpenGL "; |
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| 111 | info += p; |
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| 112 | info += '\n'; |
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| 113 | info += (const char*)glGetString(GL_VENDOR); |
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| 114 | info += '\n'; |
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| 115 | info += (const char*)glGetString(GL_RENDERER); |
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[90688f5] | 116 | #if defined __WXGTK__ || defined __WXX11__ || defined __WXMOTIF__ |
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[c293aa9] | 117 | info += string_format("\nGLX %0.1f\n", wxGLCanvas::GetGLXVersion() * 0.1); |
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[a6c5ffb] | 118 | #else |
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| 119 | info += '\n'; |
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[90688f5] | 120 | #endif |
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[cc1a1d9] | 121 | |
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| 122 | GLint red, green, blue; |
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| 123 | glGetIntegerv(GL_RED_BITS, &red); |
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| 124 | glGetIntegerv(GL_GREEN_BITS, &green); |
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| 125 | glGetIntegerv(GL_BLUE_BITS, &blue); |
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| 126 | GLint max_texture_size; |
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| 127 | glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size); |
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| 128 | GLint max_viewport[2]; |
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| 129 | glGetIntegerv(GL_MAX_VIEWPORT_DIMS, max_viewport); |
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| 130 | GLdouble point_size_range[2]; |
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[04bf822] | 131 | glGetDoublev(GL_SMOOTH_POINT_SIZE_RANGE, point_size_range); |
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[cc1a1d9] | 132 | GLdouble point_size_granularity; |
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[04bf822] | 133 | glGetDoublev(GL_SMOOTH_POINT_SIZE_GRANULARITY, &point_size_granularity); |
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[5627cbb] | 134 | info += string_format("R%dG%dB%d\n" |
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[cc1a1d9] | 135 | "Max Texture size: %dx%d\n" |
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| 136 | "Max Viewport size: %dx%d\n" |
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[04bf822] | 137 | "Smooth Point Size %.3f-%.3f (granularity %.3f)", |
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[cc1a1d9] | 138 | (int)red, (int)green, (int)blue, |
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| 139 | (int)max_texture_size, (int)max_texture_size, |
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| 140 | (int)max_viewport[0], (int)max_viewport[1], |
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| 141 | point_size_range[0], point_size_range[1], |
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| 142 | point_size_granularity); |
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[04bf822] | 143 | glGetDoublev(GL_ALIASED_POINT_SIZE_RANGE, point_size_range); |
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| 144 | if (glGetError() != GL_INVALID_ENUM) { |
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| 145 | info += string_format("\nAliased point size %.3f-%.3f", |
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| 146 | point_size_range[0], point_size_range[1]); |
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| 147 | } |
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[5627cbb] | 148 | |
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[c293aa9] | 149 | info += "\nDouble buffered: "; |
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| 150 | if (double_buffered) |
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| 151 | info += "true"; |
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| 152 | else |
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| 153 | info += "false"; |
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| 154 | |
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[5627cbb] | 155 | const GLubyte* gl_extensions = glGetString(GL_EXTENSIONS); |
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| 156 | if (*gl_extensions) { |
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| 157 | info += '\n'; |
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| 158 | info += (const char*)gl_extensions; |
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| 159 | } |
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[cc1a1d9] | 160 | return info; |
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| 161 | } |
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| 162 | |
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[fc5f476] | 163 | static bool |
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| 164 | glpoint_sprite_works() |
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| 165 | { |
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| 166 | // Point sprites provide an easy, fast way for us to draw crosses by |
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| 167 | // texture mapping GL points. |
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| 168 | // |
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| 169 | // If we have OpenGL >= 2.0 then we definitely have GL_POINT_SPRITE. |
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| 170 | // Otherwise see if we have the GL_ARB_point_sprite or GL_NV_point_sprite |
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| 171 | // extensions. |
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| 172 | // |
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| 173 | // The symbolic constants GL_POINT_SPRITE, GL_POINT_SPRITE_ARB, and |
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| 174 | // GL_POINT_SPRITE_NV all give the same number so it doesn't matter |
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| 175 | // which we use. |
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| 176 | static bool glpoint_sprite = false; |
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| 177 | static bool checked = false; |
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| 178 | if (!checked) { |
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| 179 | float maxSize = 0.0f; |
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| 180 | glGetFloatv(GL_POINT_SIZE_MAX, &maxSize); |
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| 181 | if (maxSize >= 8) { |
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| 182 | glpoint_sprite = (atoi((const char *)glGetString(GL_VERSION)) >= 2); |
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| 183 | if (!glpoint_sprite) { |
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| 184 | const char * p = (const char *)glGetString(GL_EXTENSIONS); |
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| 185 | while (true) { |
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| 186 | size_t l = 0; |
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| 187 | if (memcmp(p, "GL_ARB_point_sprite", 19) == 0) { |
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| 188 | l = 19; |
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| 189 | } else if (memcmp(p, "GL_NV_point_sprite", 18) == 0) { |
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| 190 | l = 18; |
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| 191 | } |
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| 192 | if (l) { |
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| 193 | p += l; |
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| 194 | if (*p == '\0' || *p == ' ') { |
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| 195 | glpoint_sprite = true; |
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| 196 | break; |
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| 197 | } |
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| 198 | } |
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| 199 | p = strchr(p + 1, ' '); |
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| 200 | if (!p) break; |
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| 201 | ++p; |
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| 202 | } |
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| 203 | } |
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| 204 | } |
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| 205 | checked = true; |
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| 206 | } |
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| 207 | return glpoint_sprite; |
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| 208 | } |
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| 209 | |
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[963e611] | 210 | static void |
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| 211 | log_gl_error(const wxChar * str, GLenum error_code) |
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| 212 | { |
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| 213 | const char * e = reinterpret_cast<const char *>(gluErrorString(error_code)); |
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| 214 | wxLogError(str, wxString(e, wxConvUTF8).c_str()); |
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| 215 | } |
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| 216 | |
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[1b12b82] | 217 | // Important: CHECK_GL_ERROR must not be called within a glBegin()/glEnd() pair |
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| 218 | // (thus it must not be called from BeginLines(), etc., or within a |
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| 219 | // BeginLines()/EndLines() block etc.) |
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[335a9be] | 220 | #define CHECK_GL_ERROR(M, F) do { \ |
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[19b2f99] | 221 | if (!opengl_initialised) { \ |
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[1c55fb5] | 222 | wxLogError(wxT(__FILE__ ":" STRING(__LINE__) ": OpenGL not initialised before (call " F " in method " M ")")); \ |
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[19b2f99] | 223 | } \ |
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[335a9be] | 224 | GLenum error_code_ = glGetError(); \ |
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[19bbc1fc] | 225 | if (error_code_ != GL_NO_ERROR) { \ |
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[1c55fb5] | 226 | log_gl_error(wxT(__FILE__ ":" STRING(__LINE__) ": OpenGL error: %s " \ |
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| 227 | "(call " F " in method " M ")"), error_code_); \ |
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[19bbc1fc] | 228 | } \ |
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[335a9be] | 229 | } while (0) |
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[1897247] | 230 | |
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[56da40e] | 231 | // |
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| 232 | // GLAPen |
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[096e56c] | 233 | // |
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[56da40e] | 234 | |
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[aa048c3] | 235 | GLAPen::GLAPen() |
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[56da40e] | 236 | { |
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[aa048c3] | 237 | components[0] = components[1] = components[2] = 0.0; |
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[56da40e] | 238 | } |
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| 239 | |
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| 240 | void GLAPen::SetColour(double red, double green, double blue) |
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| 241 | { |
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[aa048c3] | 242 | components[0] = red; |
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| 243 | components[1] = green; |
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| 244 | components[2] = blue; |
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[56da40e] | 245 | } |
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| 246 | |
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[f7ea0e1] | 247 | double GLAPen::GetRed() const |
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[56da40e] | 248 | { |
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[aa048c3] | 249 | return components[0]; |
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[56da40e] | 250 | } |
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| 251 | |
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[f7ea0e1] | 252 | double GLAPen::GetGreen() const |
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[56da40e] | 253 | { |
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[aa048c3] | 254 | return components[1]; |
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[56da40e] | 255 | } |
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| 256 | |
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[f7ea0e1] | 257 | double GLAPen::GetBlue() const |
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[56da40e] | 258 | { |
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[aa048c3] | 259 | return components[2]; |
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[56da40e] | 260 | } |
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| 261 | |
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[f383708] | 262 | void GLAPen::Interpolate(const GLAPen& pen, double how_far) |
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| 263 | { |
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[588ff16] | 264 | components[0] += how_far * (pen.GetRed() - components[0]); |
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| 265 | components[1] += how_far * (pen.GetGreen() - components[1]); |
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| 266 | components[2] += how_far * (pen.GetBlue() - components[2]); |
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[aa048c3] | 267 | } |
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| 268 | |
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| 269 | struct ColourTriple { |
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| 270 | // RGB triple: values are from 0-255 inclusive for each component. |
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| 271 | unsigned char r, g, b; |
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| 272 | }; |
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| 273 | |
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| 274 | // These must be in the same order as the entries in COLOURS[] below. |
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| 275 | const ColourTriple COLOURS[] = { |
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| 276 | { 0, 0, 0 }, // black |
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| 277 | { 100, 100, 100 }, // grey |
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| 278 | { 180, 180, 180 }, // light grey |
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| 279 | { 140, 140, 140 }, // light grey 2 |
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| 280 | { 90, 90, 90 }, // dark grey |
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| 281 | { 255, 255, 255 }, // white |
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| 282 | { 0, 100, 255}, // turquoise |
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| 283 | { 0, 255, 40 }, // green |
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| 284 | { 150, 205, 224 }, // indicator 1 |
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| 285 | { 114, 149, 160 }, // indicator 2 |
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| 286 | { 255, 255, 0 }, // yellow |
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| 287 | { 255, 0, 0 }, // red |
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[f4c5932] | 288 | { 40, 40, 255 }, // blue |
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[aa048c3] | 289 | }; |
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[f383708] | 290 | |
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[620c0c9] | 291 | bool GLAList::need_to_generate() { |
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| 292 | // Bail out if the list is already cached, or can't usefully be cached. |
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| 293 | if (flags & (GLACanvas::CACHED|GLACanvas::NEVER_CACHE)) |
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| 294 | return false; |
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| 295 | |
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| 296 | // Create a new OpenGL list to hold this sequence of drawing |
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| 297 | // operations. |
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| 298 | if (gl_list == 0) { |
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| 299 | gl_list = glGenLists(1); |
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| 300 | CHECK_GL_ERROR("GLAList::need_to_generate", "glGenLists"); |
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| 301 | #ifdef GLA_DEBUG |
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| 302 | printf("glGenLists(1) returned %u\n", (unsigned)gl_list); |
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| 303 | #endif |
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| 304 | if (gl_list == 0) { |
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| 305 | // If we can't create a list for any reason, fall back to just |
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[b3f1bbe] | 306 | // drawing directly, and flag the list as NEVER_CACHE as there's |
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| 307 | // unlikely to be much point calling glGenLists() again. |
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| 308 | flags = GLACanvas::NEVER_CACHE; |
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[620c0c9] | 309 | return false; |
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| 310 | } |
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| 311 | |
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| 312 | // We should have 256 lists for font drawing and a dozen or so for 2D |
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| 313 | // and 3D lists. So something is amiss if we've generated 1000 lists, |
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| 314 | // probably a infinite loop in the lazy list mechanism. |
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| 315 | assert(gl_list < 1000); |
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| 316 | } |
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| 317 | // http://www.opengl.org/resources/faq/technical/displaylist.htm advises: |
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| 318 | // |
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| 319 | // "Stay away from GL_COMPILE_AND_EXECUTE mode. Instead, create the |
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| 320 | // list using GL_COMPILE mode, then execute it with glCallList()." |
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| 321 | glNewList(gl_list, GL_COMPILE); |
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| 322 | CHECK_GL_ERROR("GLAList::need_to_generate", "glNewList"); |
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| 323 | return true; |
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| 324 | } |
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| 325 | |
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| 326 | void GLAList::finalise(unsigned int list_flags) |
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| 327 | { |
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| 328 | glEndList(); |
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| 329 | CHECK_GL_ERROR("GLAList::finalise", "glEndList"); |
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| 330 | if (list_flags & GLACanvas::NEVER_CACHE) { |
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| 331 | glDeleteLists(gl_list, 1); |
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| 332 | CHECK_GL_ERROR("GLAList::finalise", "glDeleteLists"); |
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| 333 | gl_list = 0; |
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| 334 | flags = GLACanvas::NEVER_CACHE; |
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| 335 | } else { |
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| 336 | flags = list_flags | GLACanvas::CACHED; |
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| 337 | } |
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| 338 | } |
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| 339 | |
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| 340 | bool GLAList::DrawList() const { |
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| 341 | if ((flags & GLACanvas::CACHED) == 0) |
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| 342 | return false; |
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[db59b02] | 343 | glCallList(gl_list); |
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| 344 | CHECK_GL_ERROR("GLAList::DrawList", "glCallList"); |
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[620c0c9] | 345 | return true; |
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[db59b02] | 346 | } |
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| 347 | |
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[56da40e] | 348 | // |
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| 349 | // GLACanvas |
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[096e56c] | 350 | // |
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[56da40e] | 351 | |
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[9071cf5] | 352 | BEGIN_EVENT_TABLE(GLACanvas, wxGLCanvas) |
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| 353 | EVT_SIZE(GLACanvas::OnSize) |
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| 354 | END_EVENT_TABLE() |
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| 355 | |
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[cbd9829] | 356 | static const int wx_gl_window_attribs[] = { |
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| 357 | WX_GL_DOUBLEBUFFER, |
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| 358 | WX_GL_RGBA, |
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| 359 | WX_GL_DEPTH_SIZE, 16, |
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| 360 | 0 |
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| 361 | }; |
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| 362 | |
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[84f1ed1] | 363 | // Pass wxWANTS_CHARS so that the window gets cursor keys on MS Windows. |
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| 364 | GLACanvas::GLACanvas(wxWindow* parent, int id) |
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[cbd9829] | 365 | : wxGLCanvas(parent, id, wx_gl_window_attribs, wxDefaultPosition, |
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| 366 | wxDefaultSize, wxWANTS_CHARS), |
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[8c048fa] | 367 | ctx(this), m_Translation(), blob_method(UNKNOWN), cross_method(UNKNOWN), |
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[90430f2] | 368 | x_size(0), y_size(0) |
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[56da40e] | 369 | { |
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| 370 | // Constructor. |
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| 371 | |
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[1b12b82] | 372 | m_Quadric = NULL; |
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[08253d9] | 373 | m_Pan = 0.0; |
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| 374 | m_Tilt = 0.0; |
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[9eb58d0] | 375 | m_Scale = 0.0; |
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[c5fc8eb] | 376 | m_VolumeDiameter = 1.0; |
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[d67450e] | 377 | m_SmoothShading = false; |
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[a517825] | 378 | m_Texture = 0; |
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| 379 | m_Textured = false; |
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[6abab84] | 380 | m_Perspective = false; |
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[c60062d] | 381 | m_Fog = false; |
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[db452ae] | 382 | m_AntiAlias = false; |
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[db59b02] | 383 | list_flags = 0; |
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[4a1cede] | 384 | alpha = 1.0; |
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[56da40e] | 385 | } |
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| 386 | |
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| 387 | GLACanvas::~GLACanvas() |
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| 388 | { |
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| 389 | // Destructor. |
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| 390 | |
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[1b12b82] | 391 | if (m_Quadric) { |
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[b49ac56] | 392 | gluDeleteQuadric(m_Quadric); |
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| 393 | CHECK_GL_ERROR("~GLACanvas", "gluDeleteQuadric"); |
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[1b12b82] | 394 | } |
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| 395 | } |
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| 396 | |
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| 397 | void GLACanvas::FirstShow() |
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| 398 | { |
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[90430f2] | 399 | // Update our record of the client area size and centre. |
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| 400 | GetClientSize(&x_size, &y_size); |
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[6cf4daa] | 401 | if (x_size < 1) x_size = 1; |
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| 402 | if (y_size < 1) y_size = 1; |
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[90430f2] | 403 | |
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[8c048fa] | 404 | ctx.SetCurrent(*this); |
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[4f3e5d1] | 405 | opengl_initialised = true; |
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[19b2f99] | 406 | |
---|
| 407 | // Set the background colour of the canvas to black. |
---|
| 408 | glClearColor(0.0, 0.0, 0.0, 1.0); |
---|
| 409 | CHECK_GL_ERROR("FirstShow", "glClearColor"); |
---|
| 410 | |
---|
| 411 | // Set viewport. |
---|
| 412 | glViewport(0, 0, x_size, y_size); |
---|
| 413 | CHECK_GL_ERROR("FirstShow", "glViewport"); |
---|
| 414 | |
---|
[807f9dd] | 415 | save_hints = false; |
---|
| 416 | vendor = wxString((const char *)glGetString(GL_VENDOR), wxConvUTF8); |
---|
| 417 | renderer = wxString((const char *)glGetString(GL_RENDERER), wxConvUTF8); |
---|
[fe075d7] | 418 | wxConfigBase * cfg = wxConfigBase::Get(); |
---|
| 419 | { |
---|
| 420 | wxString s; |
---|
| 421 | if (cfg->Read(wxT("opengl_vendor"), &s, wxString()) && s == vendor && |
---|
| 422 | cfg->Read(wxT("opengl_renderer"), &s, wxString()) && s == renderer) { |
---|
| 423 | // The vendor and renderer are the same as the values we have cached, |
---|
| 424 | // so use the hints we have cached. |
---|
| 425 | int v; |
---|
| 426 | if (cfg->Read(wxT("blob_method"), &v, 0) && |
---|
| 427 | (v == POINT || v == LINES)) { |
---|
| 428 | // How to draw blobs. |
---|
| 429 | blob_method = v; |
---|
| 430 | } |
---|
| 431 | if (cfg->Read(wxT("cross_method"), &v, 0) && |
---|
| 432 | (v == SPRITE || v == LINES)) { |
---|
| 433 | // How to draw crosses. |
---|
| 434 | cross_method = v; |
---|
| 435 | } |
---|
| 436 | } |
---|
| 437 | } |
---|
[db59b02] | 438 | |
---|
[4f3e5d1] | 439 | if (m_Quadric) return; |
---|
| 440 | // One time initialisation follows. |
---|
[657402d] | 441 | |
---|
[1b12b82] | 442 | m_Quadric = gluNewQuadric(); |
---|
[bb1f293] | 443 | CHECK_GL_ERROR("FirstShow", "gluNewQuadric"); |
---|
[1b12b82] | 444 | if (!m_Quadric) { |
---|
| 445 | abort(); // FIXME need to cope somehow |
---|
| 446 | } |
---|
[096e56c] | 447 | |
---|
[203d2a7] | 448 | glShadeModel(GL_FLAT); |
---|
[dde4fe7] | 449 | CHECK_GL_ERROR("FirstShow", "glShadeModel"); |
---|
[d67450e] | 450 | glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); // So text works. |
---|
[dde4fe7] | 451 | CHECK_GL_ERROR("FirstShow", "glPolygonMode"); |
---|
[e633bb1] | 452 | //glAlphaFunc(GL_GREATER, 0.5f); |
---|
| 453 | //CHECK_GL_ERROR("FirstShow", "glAlphaFunc"); |
---|
[096e56c] | 454 | |
---|
[c8f449c] | 455 | // We want glReadPixels() to read from the front buffer (which is the |
---|
| 456 | // default for single-buffered displays). |
---|
| 457 | if (double_buffered) { |
---|
| 458 | glReadBuffer(GL_FRONT); |
---|
| 459 | CHECK_GL_ERROR("FirstShow", "glReadBuffer"); |
---|
| 460 | } |
---|
| 461 | |
---|
[c60062d] | 462 | // Grey fog effect. |
---|
| 463 | GLfloat fogcolour[4] = { 0.5, 0.5, 0.5, 1.0 }; |
---|
| 464 | glFogfv(GL_FOG_COLOR, fogcolour); |
---|
[9baa53a] | 465 | CHECK_GL_ERROR("FirstShow", "glFogfv"); |
---|
[c60062d] | 466 | |
---|
| 467 | // Linear fogging. |
---|
| 468 | glFogi(GL_FOG_MODE, GL_LINEAR); |
---|
[9baa53a] | 469 | CHECK_GL_ERROR("FirstShow", "glFogi"); |
---|
[c60062d] | 470 | |
---|
| 471 | // Optimise for speed (compute fog per vertex). |
---|
| 472 | glHint(GL_FOG_HINT, GL_FASTEST); |
---|
[9baa53a] | 473 | CHECK_GL_ERROR("FirstShow", "glHint"); |
---|
[1eeb55a] | 474 | |
---|
[a517825] | 475 | // No padding on pixel packing and unpacking (default is to pad each |
---|
| 476 | // line to a multiple of 4 bytes). |
---|
| 477 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // For setting texture maps. |
---|
[028829f] | 478 | CHECK_GL_ERROR("FirstShow", "glPixelStorei GL_UNPACK_ALIGNMENT"); |
---|
[a517825] | 479 | glPixelStorei(GL_PACK_ALIGNMENT, 1); // For screengrabs and movies. |
---|
[028829f] | 480 | CHECK_GL_ERROR("FirstShow", "glPixelStorei GL_PACK_ALIGNMENT"); |
---|
| 481 | |
---|
[1eeb55a] | 482 | // Load font |
---|
[8a05a7a] | 483 | wxString path = wmsg_cfgpth(); |
---|
[bd551c0] | 484 | path += wxCONFIG_PATH_SEPARATOR; |
---|
[1aa3fb7] | 485 | path += wxT("unifont.pixelfont"); |
---|
| 486 | if (!m_Font.load(path)) { |
---|
| 487 | // FIXME: do something better. |
---|
[17c483d] | 488 | // We have this message available: Error in format of font file “%s” |
---|
[df3e1a0c] | 489 | fprintf(stderr, "Failed to parse compiled-in font data\n"); |
---|
[1aa3fb7] | 490 | exit(1); |
---|
| 491 | } |
---|
[4ba80e0] | 492 | |
---|
[fe075d7] | 493 | if (blob_method == UNKNOWN) { |
---|
| 494 | // Check if we can use GL_POINTS to plot blobs at stations. |
---|
| 495 | GLdouble point_size_range[2]; |
---|
| 496 | glGetDoublev(GL_SMOOTH_POINT_SIZE_RANGE, point_size_range); |
---|
| 497 | CHECK_GL_ERROR("FirstShow", "glGetDoublev GL_SMOOTH_POINT_SIZE_RANGE"); |
---|
| 498 | if (point_size_range[0] <= BLOB_DIAMETER && |
---|
| 499 | point_size_range[1] >= BLOB_DIAMETER) { |
---|
| 500 | blob_method = POINT; |
---|
| 501 | } else { |
---|
[cab6f11] | 502 | blob_method = glpoint_sprite_works() ? SPRITE : LINES; |
---|
[fe075d7] | 503 | } |
---|
| 504 | save_hints = true; |
---|
| 505 | } |
---|
| 506 | |
---|
| 507 | if (blob_method == POINT) { |
---|
[4ba80e0] | 508 | glPointSize(BLOB_DIAMETER); |
---|
| 509 | CHECK_GL_ERROR("FirstShow", "glPointSize"); |
---|
| 510 | } |
---|
[95ce35f] | 511 | |
---|
[fe075d7] | 512 | if (cross_method == UNKNOWN) { |
---|
[fc5f476] | 513 | cross_method = glpoint_sprite_works() ? SPRITE : LINES; |
---|
[fe075d7] | 514 | save_hints = true; |
---|
[95ce35f] | 515 | } |
---|
[185d793] | 516 | |
---|
[fe075d7] | 517 | if (cross_method == SPRITE) { |
---|
[95ce35f] | 518 | glGenTextures(1, &m_CrossTexture); |
---|
[9baa53a] | 519 | CHECK_GL_ERROR("FirstShow", "glGenTextures"); |
---|
[95ce35f] | 520 | glBindTexture(GL_TEXTURE_2D, m_CrossTexture); |
---|
[9baa53a] | 521 | CHECK_GL_ERROR("FirstShow", "glBindTexture"); |
---|
[fe075d7] | 522 | // Cross image for drawing crosses using texture mapped point sprites. |
---|
[95ce35f] | 523 | const unsigned char crossteximage[128] = { |
---|
[edfaf35] | 524 | #define o 0,0 |
---|
| 525 | #define I 255,255 |
---|
| 526 | CROSS_TEXTURE |
---|
| 527 | #undef o |
---|
| 528 | #undef I |
---|
[95ce35f] | 529 | }; |
---|
| 530 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
---|
[9baa53a] | 531 | CHECK_GL_ERROR("FirstShow", "glPixelStorei"); |
---|
[95ce35f] | 532 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
---|
[9baa53a] | 533 | CHECK_GL_ERROR("FirstShow", "glTexEnvi"); |
---|
[95ce35f] | 534 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); |
---|
[9baa53a] | 535 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_WRAP_S"); |
---|
[95ce35f] | 536 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); |
---|
[9baa53a] | 537 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_WRAP_T"); |
---|
[95ce35f] | 538 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, 8, 8, 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, (GLvoid *)crossteximage); |
---|
[9baa53a] | 539 | CHECK_GL_ERROR("FirstShow", "glTexImage2D"); |
---|
[95ce35f] | 540 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
---|
[9baa53a] | 541 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
---|
[95ce35f] | 542 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
---|
[9baa53a] | 543 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
[95ce35f] | 544 | } |
---|
[cab6f11] | 545 | |
---|
| 546 | if (blob_method == SPRITE) { |
---|
| 547 | glGenTextures(1, &m_BlobTexture); |
---|
| 548 | CHECK_GL_ERROR("FirstShow", "glGenTextures"); |
---|
| 549 | glBindTexture(GL_TEXTURE_2D, m_BlobTexture); |
---|
| 550 | CHECK_GL_ERROR("FirstShow", "glBindTexture"); |
---|
| 551 | // Image for drawing blobs using texture mapped point sprites. |
---|
| 552 | const unsigned char blobteximage[128] = { |
---|
| 553 | #define o 0,0 |
---|
| 554 | #define I 255,255 |
---|
| 555 | BLOB_TEXTURE |
---|
| 556 | #undef o |
---|
| 557 | #undef I |
---|
| 558 | }; |
---|
| 559 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
---|
| 560 | CHECK_GL_ERROR("FirstShow", "glPixelStorei"); |
---|
| 561 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
---|
| 562 | CHECK_GL_ERROR("FirstShow", "glTexEnvi"); |
---|
| 563 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); |
---|
| 564 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_WRAP_S"); |
---|
| 565 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); |
---|
| 566 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_WRAP_T"); |
---|
| 567 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, 8, 8, 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, (GLvoid *)blobteximage); |
---|
| 568 | CHECK_GL_ERROR("FirstShow", "glTexImage2D"); |
---|
| 569 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
---|
| 570 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
---|
| 571 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
---|
| 572 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
| 573 | } |
---|
[ca8c864] | 574 | } |
---|
| 575 | |
---|
[56da40e] | 576 | void GLACanvas::Clear() |
---|
| 577 | { |
---|
| 578 | // Clear the canvas. |
---|
[d727368] | 579 | |
---|
[56da40e] | 580 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
---|
[1897247] | 581 | CHECK_GL_ERROR("Clear", "glClear"); |
---|
[56da40e] | 582 | } |
---|
| 583 | |
---|
| 584 | void GLACanvas::SetScale(Double scale) |
---|
| 585 | { |
---|
[db59b02] | 586 | if (scale != m_Scale) { |
---|
| 587 | vector<GLAList>::iterator i; |
---|
| 588 | for (i = drawing_lists.begin(); i != drawing_lists.end(); ++i) { |
---|
[b3f1bbe] | 589 | i->invalidate_if(INVALIDATE_ON_SCALE); |
---|
[db59b02] | 590 | } |
---|
| 591 | |
---|
| 592 | m_Scale = scale; |
---|
| 593 | } |
---|
[56da40e] | 594 | } |
---|
| 595 | |
---|
[90430f2] | 596 | void GLACanvas::OnSize(wxSizeEvent & event) |
---|
| 597 | { |
---|
| 598 | wxSize size = event.GetSize(); |
---|
| 599 | |
---|
| 600 | unsigned int mask = 0; |
---|
| 601 | if (size.GetWidth() != x_size) mask |= INVALIDATE_ON_X_RESIZE; |
---|
| 602 | if (size.GetHeight() != y_size) mask |= INVALIDATE_ON_Y_RESIZE; |
---|
| 603 | if (mask) { |
---|
| 604 | vector<GLAList>::iterator i; |
---|
| 605 | for (i = drawing_lists.begin(); i != drawing_lists.end(); ++i) { |
---|
[b3f1bbe] | 606 | i->invalidate_if(mask); |
---|
[90430f2] | 607 | } |
---|
| 608 | |
---|
[6cf4daa] | 609 | // The width and height go to zero when the panel is dragged right |
---|
| 610 | // across so we clamp them to be at least 1 to avoid problems. |
---|
[90430f2] | 611 | x_size = size.GetWidth(); |
---|
| 612 | y_size = size.GetHeight(); |
---|
[6cf4daa] | 613 | if (x_size < 1) x_size = 1; |
---|
| 614 | if (y_size < 1) y_size = 1; |
---|
[90430f2] | 615 | } |
---|
| 616 | |
---|
[9071cf5] | 617 | event.Skip(); |
---|
[6cf4daa] | 618 | |
---|
[19b2f99] | 619 | if (!opengl_initialised) return; |
---|
| 620 | |
---|
[6cf4daa] | 621 | // Set viewport. |
---|
| 622 | glViewport(0, 0, x_size, y_size); |
---|
[92678b5] | 623 | CHECK_GL_ERROR("OnSize", "glViewport"); |
---|
[90430f2] | 624 | } |
---|
| 625 | |
---|
[56da40e] | 626 | void GLACanvas::AddTranslationScreenCoordinates(int dx, int dy) |
---|
| 627 | { |
---|
| 628 | // Translate the data by a given amount, specified in screen coordinates. |
---|
[096e56c] | 629 | |
---|
[56da40e] | 630 | // Find out how far the translation takes us in data coordinates. |
---|
| 631 | SetDataTransform(); |
---|
| 632 | |
---|
[f6d8375] | 633 | double x0, y0, z0; |
---|
| 634 | double x, y, z; |
---|
[1b12b82] | 635 | gluUnProject(0.0, 0.0, 0.0, modelview_matrix, projection_matrix, viewport, |
---|
[b49ac56] | 636 | &x0, &y0, &z0); |
---|
[bb1f293] | 637 | CHECK_GL_ERROR("AddTranslationScreenCoordinates", "gluUnProject"); |
---|
[1b12b82] | 638 | gluUnProject(dx, -dy, 0.0, modelview_matrix, projection_matrix, viewport, |
---|
[b49ac56] | 639 | &x, &y, &z); |
---|
[bb1f293] | 640 | CHECK_GL_ERROR("AddTranslationScreenCoordinates", "gluUnProject (2)"); |
---|
[56da40e] | 641 | |
---|
| 642 | // Apply the translation. |
---|
[d67450e] | 643 | AddTranslation(Vector3(x - x0, y - y0, z - z0)); |
---|
[56da40e] | 644 | } |
---|
| 645 | |
---|
[c5fc8eb] | 646 | void GLACanvas::SetVolumeDiameter(glaCoord diameter) |
---|
[56da40e] | 647 | { |
---|
[c5fc8eb] | 648 | // Set the size of the data drawing volume by giving the diameter of the |
---|
| 649 | // smallest sphere containing it. |
---|
[56da40e] | 650 | |
---|
[f6d8375] | 651 | m_VolumeDiameter = max(glaCoord(1.0), diameter); |
---|
[56da40e] | 652 | } |
---|
| 653 | |
---|
| 654 | void GLACanvas::StartDrawing() |
---|
| 655 | { |
---|
| 656 | // Prepare for a redraw operation. |
---|
[096e56c] | 657 | |
---|
[8c048fa] | 658 | ctx.SetCurrent(*this); |
---|
[12ec820] | 659 | glDepthMask(GL_TRUE); |
---|
[807f9dd] | 660 | |
---|
| 661 | if (!save_hints) return; |
---|
| 662 | |
---|
| 663 | // We want to check on the second redraw. |
---|
| 664 | static int draw_count = 2; |
---|
| 665 | if (--draw_count != 0) return; |
---|
| 666 | |
---|
| 667 | if (cross_method != LINES) { |
---|
| 668 | SetColour(col_WHITE); |
---|
| 669 | Clear(); |
---|
| 670 | SetDataTransform(); |
---|
| 671 | BeginCrosses(); |
---|
| 672 | DrawCross(-m_Translation.GetX(), -m_Translation.GetY(), -m_Translation.GetZ()); |
---|
| 673 | EndCrosses(); |
---|
| 674 | static const unsigned char expected_cross[64 * 3] = { |
---|
| 675 | #define o 0,0,0 |
---|
| 676 | #define I 255,255,255 |
---|
[edfaf35] | 677 | CROSS_TEXTURE |
---|
[dd64a45] | 678 | #undef o |
---|
| 679 | #undef I |
---|
[807f9dd] | 680 | }; |
---|
| 681 | if (!CheckVisualFidelity(expected_cross)) { |
---|
| 682 | cross_method = LINES; |
---|
| 683 | save_hints = true; |
---|
| 684 | } |
---|
| 685 | } |
---|
| 686 | |
---|
| 687 | if (blob_method != LINES) { |
---|
| 688 | SetColour(col_WHITE); |
---|
| 689 | Clear(); |
---|
| 690 | SetDataTransform(); |
---|
| 691 | BeginBlobs(); |
---|
| 692 | DrawBlob(-m_Translation.GetX(), -m_Translation.GetY(), -m_Translation.GetZ()); |
---|
| 693 | EndBlobs(); |
---|
| 694 | static const unsigned char expected_blob[64 * 3] = { |
---|
| 695 | #define o 0,0,0 |
---|
| 696 | #define I 255,255,255 |
---|
[edfaf35] | 697 | BLOB_TEXTURE |
---|
[dd64a45] | 698 | #undef o |
---|
| 699 | #undef I |
---|
[807f9dd] | 700 | }; |
---|
| 701 | if (!CheckVisualFidelity(expected_blob)) { |
---|
| 702 | blob_method = LINES; |
---|
| 703 | save_hints = true; |
---|
| 704 | } |
---|
| 705 | } |
---|
| 706 | |
---|
| 707 | wxConfigBase * cfg = wxConfigBase::Get(); |
---|
| 708 | cfg->Write(wxT("opengl_vendor"), vendor); |
---|
| 709 | cfg->Write(wxT("opengl_renderer"), renderer); |
---|
| 710 | cfg->Write(wxT("blob_method"), blob_method); |
---|
| 711 | cfg->Write(wxT("cross_method"), cross_method); |
---|
| 712 | cfg->Flush(); |
---|
| 713 | save_hints = false; |
---|
[56da40e] | 714 | } |
---|
| 715 | |
---|
[d67450e] | 716 | void GLACanvas::EnableSmoothPolygons(bool filled) |
---|
[1b12b82] | 717 | { |
---|
| 718 | // Prepare for drawing smoothly-shaded polygons. |
---|
| 719 | // Only use this when required (in particular lines in lists may not be |
---|
| 720 | // coloured correctly when this is enabled). |
---|
[096e56c] | 721 | |
---|
[d67450e] | 722 | glPushAttrib(GL_ENABLE_BIT|GL_LIGHTING_BIT|GL_POLYGON_BIT); |
---|
| 723 | if (filled) { |
---|
| 724 | glShadeModel(GL_SMOOTH); |
---|
| 725 | glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
---|
| 726 | } else { |
---|
| 727 | glDisable(GL_LINE_SMOOTH); |
---|
| 728 | glDisable(GL_TEXTURE_2D); |
---|
| 729 | glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); |
---|
| 730 | } |
---|
| 731 | CHECK_GL_ERROR("EnableSmoothPolygons", "glPolygonMode"); |
---|
| 732 | |
---|
| 733 | if (filled && m_SmoothShading) { |
---|
| 734 | static const GLfloat mat_specular[] = { 0.2, 0.2, 0.2, 1.0 }; |
---|
| 735 | static const GLfloat light_position[] = { -1.0, -1.0, -1.0, 0.0 }; |
---|
| 736 | static const GLfloat light_ambient[] = { 0.3, 0.3, 0.3, 1.0 }; |
---|
| 737 | static const GLfloat light_diffuse[] = { 0.7, 0.7, 0.7, 1.0 }; |
---|
| 738 | glEnable(GL_COLOR_MATERIAL); |
---|
| 739 | glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, mat_specular); |
---|
| 740 | glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 10.0); |
---|
| 741 | glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient); |
---|
| 742 | glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse); |
---|
| 743 | glLightfv(GL_LIGHT0, GL_POSITION, light_position); |
---|
| 744 | glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE); |
---|
| 745 | glEnable(GL_LIGHTING); |
---|
| 746 | glEnable(GL_LIGHT0); |
---|
| 747 | } |
---|
[1b12b82] | 748 | } |
---|
| 749 | |
---|
| 750 | void GLACanvas::DisableSmoothPolygons() |
---|
| 751 | { |
---|
[d67450e] | 752 | glPopAttrib(); |
---|
[203d2a7] | 753 | } |
---|
| 754 | |
---|
[d67450e] | 755 | void GLACanvas::PlaceNormal(const Vector3 &v) |
---|
[203d2a7] | 756 | { |
---|
| 757 | // Add a normal (for polygons etc.) |
---|
| 758 | |
---|
[d67450e] | 759 | glNormal3d(v.GetX(), v.GetY(), v.GetZ()); |
---|
[1b12b82] | 760 | } |
---|
| 761 | |
---|
[56da40e] | 762 | void GLACanvas::SetDataTransform() |
---|
| 763 | { |
---|
[de24f93] | 764 | // Set projection. |
---|
| 765 | glMatrixMode(GL_PROJECTION); |
---|
| 766 | CHECK_GL_ERROR("SetDataTransform", "glMatrixMode"); |
---|
| 767 | glLoadIdentity(); |
---|
| 768 | CHECK_GL_ERROR("SetDataTransform", "glLoadIdentity"); |
---|
| 769 | |
---|
[6cf4daa] | 770 | double aspect = double(y_size) / double(x_size); |
---|
| 771 | |
---|
[d877aa2] | 772 | Double near_plane = 1.0; |
---|
[de24f93] | 773 | if (m_Perspective) { |
---|
[e577f89] | 774 | Double lr = near_plane * tan(rad(25.0)); |
---|
[d877aa2] | 775 | Double far_plane = m_VolumeDiameter * 5 + near_plane; // FIXME: work out properly |
---|
| 776 | Double tb = lr * aspect; |
---|
[de24f93] | 777 | glFrustum(-lr, lr, -tb, tb, near_plane, far_plane); |
---|
| 778 | CHECK_GL_ERROR("SetViewportAndProjection", "glFrustum"); |
---|
| 779 | } else { |
---|
[5092ee7] | 780 | near_plane = 0.0; |
---|
[d877aa2] | 781 | assert(m_Scale != 0.0); |
---|
| 782 | Double lr = m_VolumeDiameter / m_Scale * 0.5; |
---|
| 783 | Double far_plane = m_VolumeDiameter + near_plane; |
---|
| 784 | Double tb = lr * aspect; |
---|
[de24f93] | 785 | glOrtho(-lr, lr, -tb, tb, near_plane, far_plane); |
---|
| 786 | CHECK_GL_ERROR("SetViewportAndProjection", "glOrtho"); |
---|
| 787 | } |
---|
| 788 | |
---|
[56da40e] | 789 | // Set the modelview transform for drawing data. |
---|
| 790 | glMatrixMode(GL_MODELVIEW); |
---|
[1897247] | 791 | CHECK_GL_ERROR("SetDataTransform", "glMatrixMode"); |
---|
[56da40e] | 792 | glLoadIdentity(); |
---|
[1897247] | 793 | CHECK_GL_ERROR("SetDataTransform", "glLoadIdentity"); |
---|
[d877aa2] | 794 | if (m_Perspective) { |
---|
| 795 | glTranslated(0.0, 0.0, -near_plane); |
---|
| 796 | } else { |
---|
| 797 | glTranslated(0.0, 0.0, -0.5 * m_VolumeDiameter); |
---|
| 798 | } |
---|
[1bbd9a8] | 799 | CHECK_GL_ERROR("SetDataTransform", "glTranslated"); |
---|
[2491b8c] | 800 | // Get axes the correct way around (z upwards, y into screen) |
---|
| 801 | glRotated(-90.0, 1.0, 0.0, 0.0); |
---|
| 802 | CHECK_GL_ERROR("SetDataTransform", "glRotated"); |
---|
[7a57dc7] | 803 | glRotated(-m_Tilt, 1.0, 0.0, 0.0); |
---|
[08253d9] | 804 | CHECK_GL_ERROR("SetDataTransform", "glRotated"); |
---|
| 805 | glRotated(m_Pan, 0.0, 0.0, 1.0); |
---|
[2491b8c] | 806 | CHECK_GL_ERROR("SetDataTransform", "CopyToOpenGL"); |
---|
[5092ee7] | 807 | if (m_Perspective) { |
---|
[d67450e] | 808 | glTranslated(m_Translation.GetX(), |
---|
| 809 | m_Translation.GetY(), |
---|
| 810 | m_Translation.GetZ()); |
---|
[5092ee7] | 811 | CHECK_GL_ERROR("SetDataTransform", "glTranslated"); |
---|
| 812 | } |
---|
[dde4fe7] | 813 | |
---|
[de24f93] | 814 | // Save projection matrix. |
---|
| 815 | glGetDoublev(GL_PROJECTION_MATRIX, projection_matrix); |
---|
| 816 | CHECK_GL_ERROR("SetDataTransform", "glGetDoublev"); |
---|
| 817 | |
---|
| 818 | // Save viewport coordinates. |
---|
| 819 | glGetIntegerv(GL_VIEWPORT, viewport); |
---|
| 820 | CHECK_GL_ERROR("SetDataTransform", "glGetIntegerv"); |
---|
| 821 | |
---|
| 822 | // Save modelview matrix. |
---|
[dde4fe7] | 823 | glGetDoublev(GL_MODELVIEW_MATRIX, modelview_matrix); |
---|
| 824 | CHECK_GL_ERROR("SetDataTransform", "glGetDoublev"); |
---|
[de24f93] | 825 | |
---|
[5092ee7] | 826 | if (!m_Perspective) { |
---|
| 827 | // Adjust the translation so we don't change the Z position of the model |
---|
[f6d8375] | 828 | double X, Y, Z; |
---|
[d67450e] | 829 | gluProject(m_Translation.GetX(), |
---|
| 830 | m_Translation.GetY(), |
---|
| 831 | m_Translation.GetZ(), |
---|
[5092ee7] | 832 | modelview_matrix, projection_matrix, viewport, |
---|
| 833 | &X, &Y, &Z); |
---|
[f6d8375] | 834 | double Tx, Ty, Tz; |
---|
[5092ee7] | 835 | gluUnProject(X, Y, 0.5, modelview_matrix, projection_matrix, viewport, |
---|
| 836 | &Tx, &Ty, &Tz); |
---|
| 837 | glTranslated(Tx, Ty, Tz); |
---|
| 838 | CHECK_GL_ERROR("SetDataTransform", "glTranslated"); |
---|
| 839 | glGetDoublev(GL_MODELVIEW_MATRIX, modelview_matrix); |
---|
| 840 | } |
---|
[096e56c] | 841 | |
---|
[de24f93] | 842 | glEnable(GL_DEPTH_TEST); |
---|
| 843 | CHECK_GL_ERROR("SetDataTransform", "glEnable GL_DEPTH_TEST"); |
---|
[c60062d] | 844 | |
---|
[a517825] | 845 | if (m_Textured) { |
---|
| 846 | glBindTexture(GL_TEXTURE_2D, m_Texture); |
---|
| 847 | glEnable(GL_TEXTURE_2D); |
---|
| 848 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); |
---|
| 849 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_WRAP_S"); |
---|
| 850 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); |
---|
| 851 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_WRAP_T"); |
---|
| 852 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
---|
| 853 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
---|
[ecbdd96] | 854 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, |
---|
| 855 | GL_LINEAR_MIPMAP_LINEAR); |
---|
[a517825] | 856 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
| 857 | glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); |
---|
| 858 | } else { |
---|
| 859 | glDisable(GL_TEXTURE_2D); |
---|
| 860 | } |
---|
[c60062d] | 861 | if (m_Fog) { |
---|
| 862 | glFogf(GL_FOG_START, near_plane); |
---|
| 863 | glFogf(GL_FOG_END, near_plane + m_VolumeDiameter); |
---|
| 864 | glEnable(GL_FOG); |
---|
[db452ae] | 865 | } else { |
---|
| 866 | glDisable(GL_FOG); |
---|
| 867 | } |
---|
| 868 | |
---|
[4a1cede] | 869 | glEnable(GL_BLEND); |
---|
| 870 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
---|
[db452ae] | 871 | if (m_AntiAlias) { |
---|
| 872 | glEnable(GL_LINE_SMOOTH); |
---|
| 873 | } else { |
---|
| 874 | glDisable(GL_LINE_SMOOTH); |
---|
[c60062d] | 875 | } |
---|
[56da40e] | 876 | } |
---|
| 877 | |
---|
| 878 | void GLACanvas::SetIndicatorTransform() |
---|
| 879 | { |
---|
[db59b02] | 880 | list_flags |= NEVER_CACHE; |
---|
| 881 | |
---|
[bb1f293] | 882 | // Set the modelview transform and projection for drawing indicators. |
---|
[56da40e] | 883 | |
---|
[bb1f293] | 884 | glDisable(GL_DEPTH_TEST); |
---|
| 885 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_DEPTH_TEST"); |
---|
[c60062d] | 886 | glDisable(GL_FOG); |
---|
| 887 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_FOG"); |
---|
[bb1f293] | 888 | |
---|
[78924eb] | 889 | // Just a simple 2D projection. |
---|
[bb1f293] | 890 | glMatrixMode(GL_PROJECTION); |
---|
| 891 | CHECK_GL_ERROR("SetIndicatorTransform", "glMatrixMode"); |
---|
| 892 | glLoadIdentity(); |
---|
| 893 | CHECK_GL_ERROR("SetIndicatorTransform", "glLoadIdentity (2)"); |
---|
[6cf4daa] | 894 | gluOrtho2D(0, x_size, 0, y_size); |
---|
[bb1f293] | 895 | CHECK_GL_ERROR("SetIndicatorTransform", "gluOrtho2D"); |
---|
[a517825] | 896 | |
---|
[78924eb] | 897 | // No modelview transform. |
---|
| 898 | glMatrixMode(GL_MODELVIEW); |
---|
| 899 | CHECK_GL_ERROR("SetIndicatorTransform", "glMatrixMode"); |
---|
| 900 | glLoadIdentity(); |
---|
| 901 | CHECK_GL_ERROR("SetIndicatorTransform", "glLoadIdentity"); |
---|
| 902 | |
---|
[a517825] | 903 | glDisable(GL_TEXTURE_2D); |
---|
[6adffadf] | 904 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_TEXTURE_2D"); |
---|
[e4d40792] | 905 | glDisable(GL_BLEND); |
---|
[6adffadf] | 906 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_BLEND"); |
---|
[36c3285] | 907 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); |
---|
[9baa53a] | 908 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_WRAP_S"); |
---|
[36c3285] | 909 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); |
---|
[9baa53a] | 910 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_WRAP_T"); |
---|
[36c3285] | 911 | glAlphaFunc(GL_GREATER, 0.5f); |
---|
[9baa53a] | 912 | CHECK_GL_ERROR("SetIndicatorTransform", "glAlphaFunc"); |
---|
[096e56c] | 913 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
---|
[9baa53a] | 914 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
---|
[36c3285] | 915 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
---|
[9baa53a] | 916 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
[36c3285] | 917 | glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST); |
---|
[9baa53a] | 918 | CHECK_GL_ERROR("SetIndicatorTransform", "glHint"); |
---|
[56da40e] | 919 | } |
---|
| 920 | |
---|
| 921 | void GLACanvas::FinishDrawing() |
---|
| 922 | { |
---|
| 923 | // Complete a redraw operation. |
---|
[096e56c] | 924 | |
---|
[c293aa9] | 925 | if (double_buffered) { |
---|
| 926 | SwapBuffers(); |
---|
| 927 | } else { |
---|
| 928 | glFlush(); |
---|
| 929 | CHECK_GL_ERROR("FinishDrawing", "glFlush"); |
---|
| 930 | } |
---|
[56da40e] | 931 | } |
---|
| 932 | |
---|
[d2fcc9b] | 933 | void GLACanvas::DrawList(unsigned int l) |
---|
[56da40e] | 934 | { |
---|
[4ba80e0] | 935 | // FIXME: uncomment to disable use of lists for debugging: |
---|
| 936 | // GenerateList(l); return; |
---|
[d2fcc9b] | 937 | if (l >= drawing_lists.size()) drawing_lists.resize(l + 1); |
---|
[bae6a7c] | 938 | |
---|
[d2fcc9b] | 939 | // We generate the OpenGL lists lazily to minimise delays on startup. |
---|
| 940 | // So check if we need to generate the OpenGL list now. |
---|
[620c0c9] | 941 | if (drawing_lists[l].need_to_generate()) { |
---|
[db59b02] | 942 | // Clear list_flags so that we can note what conditions to invalidate |
---|
| 943 | // the cached OpenGL list on. |
---|
| 944 | list_flags = 0; |
---|
[620c0c9] | 945 | |
---|
| 946 | #ifdef GLA_DEBUG |
---|
| 947 | printf("generating list #%u... ", l); |
---|
| 948 | m_Vertices = 0; |
---|
| 949 | #endif |
---|
[d2fcc9b] | 950 | GenerateList(l); |
---|
[edb6576] | 951 | #ifdef GLA_DEBUG |
---|
[bae6a7c] | 952 | printf("done (%d vertices)\n", m_Vertices); |
---|
[edb6576] | 953 | #endif |
---|
[620c0c9] | 954 | drawing_lists[l].finalise(list_flags); |
---|
[bae6a7c] | 955 | } |
---|
[ee78822] | 956 | |
---|
[620c0c9] | 957 | if (!drawing_lists[l].DrawList()) { |
---|
| 958 | // That list isn't cached (which means it probably can't usefully be |
---|
| 959 | // cached). |
---|
[db59b02] | 960 | GenerateList(l); |
---|
| 961 | } |
---|
[56da40e] | 962 | } |
---|
| 963 | |
---|
[11fe902] | 964 | void GLACanvas::DrawListZPrepass(unsigned int l) |
---|
| 965 | { |
---|
| 966 | glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); |
---|
| 967 | DrawList(l); |
---|
| 968 | glDepthMask(GL_FALSE); |
---|
| 969 | glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); |
---|
| 970 | glDepthFunc(GL_EQUAL); |
---|
| 971 | DrawList(l); |
---|
| 972 | glDepthMask(GL_TRUE); |
---|
| 973 | glDepthFunc(GL_LESS); |
---|
| 974 | } |
---|
| 975 | |
---|
[76dd228] | 976 | void GLACanvas::DrawList2D(unsigned int l, glaCoord x, glaCoord y, Double rotation) |
---|
| 977 | { |
---|
| 978 | glMatrixMode(GL_PROJECTION); |
---|
| 979 | CHECK_GL_ERROR("DrawList2D", "glMatrixMode"); |
---|
| 980 | glPushMatrix(); |
---|
| 981 | CHECK_GL_ERROR("DrawList2D", "glPushMatrix"); |
---|
| 982 | glTranslated(x, y, 0); |
---|
| 983 | CHECK_GL_ERROR("DrawList2D", "glTranslated"); |
---|
| 984 | if (rotation != 0.0) { |
---|
| 985 | glRotated(rotation, 0, 0, -1); |
---|
| 986 | CHECK_GL_ERROR("DrawList2D", "glRotated"); |
---|
| 987 | } |
---|
| 988 | DrawList(l); |
---|
| 989 | glMatrixMode(GL_PROJECTION); |
---|
| 990 | CHECK_GL_ERROR("DrawList2D", "glMatrixMode 2"); |
---|
| 991 | glPopMatrix(); |
---|
| 992 | CHECK_GL_ERROR("DrawList2D", "glPopMatrix"); |
---|
| 993 | } |
---|
| 994 | |
---|
[aa048c3] | 995 | void GLACanvas::SetColour(const GLAPen& pen, double rgb_scale) |
---|
[56da40e] | 996 | { |
---|
| 997 | // Set the colour for subsequent operations. |
---|
[4a1cede] | 998 | glColor4f(pen.GetRed() * rgb_scale, pen.GetGreen() * rgb_scale, |
---|
| 999 | pen.GetBlue() * rgb_scale, alpha); |
---|
[56da40e] | 1000 | } |
---|
| 1001 | |
---|
[aa048c3] | 1002 | void GLACanvas::SetColour(const GLAPen& pen) |
---|
[f383708] | 1003 | { |
---|
[aa048c3] | 1004 | // Set the colour for subsequent operations. |
---|
[4a1cede] | 1005 | glColor4d(pen.components[0], pen.components[1], pen.components[2], alpha); |
---|
[f383708] | 1006 | } |
---|
| 1007 | |
---|
[d1ce9bd] | 1008 | void GLACanvas::SetColour(gla_colour colour, double rgb_scale) |
---|
| 1009 | { |
---|
| 1010 | // Set the colour for subsequent operations. |
---|
| 1011 | rgb_scale /= 255.0; |
---|
| 1012 | glColor4f(COLOURS[colour].r * rgb_scale, |
---|
| 1013 | COLOURS[colour].g * rgb_scale, |
---|
| 1014 | COLOURS[colour].b * rgb_scale, |
---|
| 1015 | alpha); |
---|
| 1016 | } |
---|
| 1017 | |
---|
[aa048c3] | 1018 | void GLACanvas::SetColour(gla_colour colour) |
---|
[56da40e] | 1019 | { |
---|
[aa048c3] | 1020 | // Set the colour for subsequent operations. |
---|
[4943ae8] | 1021 | if (alpha == 1.0) { |
---|
| 1022 | glColor3ubv(&COLOURS[colour].r); |
---|
| 1023 | } else { |
---|
| 1024 | glColor4ub(COLOURS[colour].r, |
---|
| 1025 | COLOURS[colour].g, |
---|
| 1026 | COLOURS[colour].b, |
---|
| 1027 | (unsigned char)(255 * alpha)); |
---|
| 1028 | } |
---|
[56da40e] | 1029 | } |
---|
| 1030 | |
---|
| 1031 | void GLACanvas::DrawText(glaCoord x, glaCoord y, glaCoord z, const wxString& str) |
---|
| 1032 | { |
---|
| 1033 | // Draw a text string on the current buffer in the current font. |
---|
| 1034 | glRasterPos3d(x, y, z); |
---|
[1897247] | 1035 | CHECK_GL_ERROR("DrawText", "glRasterPos3d"); |
---|
[1aa3fb7] | 1036 | m_Font.write_string(str.data(), str.size()); |
---|
[56da40e] | 1037 | } |
---|
| 1038 | |
---|
[1eeb55a] | 1039 | void GLACanvas::DrawIndicatorText(int x, int y, const wxString& str) |
---|
[56da40e] | 1040 | { |
---|
[1aa3fb7] | 1041 | glRasterPos2d(x, y); |
---|
| 1042 | CHECK_GL_ERROR("DrawIndicatorText", "glRasterPos2d"); |
---|
| 1043 | m_Font.write_string(str.data(), str.size()); |
---|
[56da40e] | 1044 | } |
---|
| 1045 | |
---|
[dbd50e2] | 1046 | void GLACanvas::GetTextExtent(const wxString& str, int * x_ext, int * y_ext) const |
---|
[56da40e] | 1047 | { |
---|
[1aa3fb7] | 1048 | m_Font.get_text_extent(str.data(), str.size(), x_ext, y_ext); |
---|
[56da40e] | 1049 | } |
---|
| 1050 | |
---|
| 1051 | void GLACanvas::BeginQuadrilaterals() |
---|
| 1052 | { |
---|
| 1053 | // Commence drawing of quadrilaterals. |
---|
[096e56c] | 1054 | |
---|
[56da40e] | 1055 | glBegin(GL_QUADS); |
---|
| 1056 | } |
---|
| 1057 | |
---|
| 1058 | void GLACanvas::EndQuadrilaterals() |
---|
| 1059 | { |
---|
| 1060 | // Finish drawing of quadrilaterals. |
---|
[096e56c] | 1061 | |
---|
[56da40e] | 1062 | glEnd(); |
---|
[9baa53a] | 1063 | CHECK_GL_ERROR("EndQuadrilaterals", "glEnd GL_QUADS"); |
---|
[56da40e] | 1064 | } |
---|
| 1065 | |
---|
| 1066 | void GLACanvas::BeginLines() |
---|
| 1067 | { |
---|
| 1068 | // Commence drawing of a set of lines. |
---|
| 1069 | |
---|
| 1070 | glBegin(GL_LINES); |
---|
| 1071 | } |
---|
| 1072 | |
---|
| 1073 | void GLACanvas::EndLines() |
---|
| 1074 | { |
---|
| 1075 | // Finish drawing of a set of lines. |
---|
| 1076 | |
---|
| 1077 | glEnd(); |
---|
[9baa53a] | 1078 | CHECK_GL_ERROR("EndLines", "glEnd GL_LINES"); |
---|
[56da40e] | 1079 | } |
---|
| 1080 | |
---|
| 1081 | void GLACanvas::BeginTriangles() |
---|
| 1082 | { |
---|
| 1083 | // Commence drawing of a set of triangles. |
---|
| 1084 | |
---|
| 1085 | glBegin(GL_TRIANGLES); |
---|
| 1086 | } |
---|
| 1087 | |
---|
| 1088 | void GLACanvas::EndTriangles() |
---|
| 1089 | { |
---|
| 1090 | // Finish drawing of a set of triangles. |
---|
| 1091 | |
---|
| 1092 | glEnd(); |
---|
[9baa53a] | 1093 | CHECK_GL_ERROR("EndTriangles", "glEnd GL_TRIANGLES"); |
---|
[56da40e] | 1094 | } |
---|
| 1095 | |
---|
[dde4fe7] | 1096 | void GLACanvas::BeginTriangleStrip() |
---|
| 1097 | { |
---|
| 1098 | // Commence drawing of a triangle strip. |
---|
| 1099 | |
---|
| 1100 | glBegin(GL_TRIANGLE_STRIP); |
---|
| 1101 | } |
---|
| 1102 | |
---|
| 1103 | void GLACanvas::EndTriangleStrip() |
---|
| 1104 | { |
---|
| 1105 | // Finish drawing of a triangle strip. |
---|
| 1106 | |
---|
| 1107 | glEnd(); |
---|
[9baa53a] | 1108 | CHECK_GL_ERROR("EndTriangleStrip", "glEnd GL_TRIANGLE_STRIP"); |
---|
[dde4fe7] | 1109 | } |
---|
| 1110 | |
---|
[56da40e] | 1111 | void GLACanvas::BeginPolyline() |
---|
| 1112 | { |
---|
| 1113 | // Commence drawing of a polyline. |
---|
| 1114 | |
---|
| 1115 | glBegin(GL_LINE_STRIP); |
---|
| 1116 | } |
---|
| 1117 | |
---|
| 1118 | void GLACanvas::EndPolyline() |
---|
| 1119 | { |
---|
| 1120 | // Finish drawing of a polyline. |
---|
[096e56c] | 1121 | |
---|
[56da40e] | 1122 | glEnd(); |
---|
[9baa53a] | 1123 | CHECK_GL_ERROR("EndPolyline", "glEnd GL_LINE_STRIP"); |
---|
[56da40e] | 1124 | } |
---|
| 1125 | |
---|
[45aa1d6] | 1126 | void GLACanvas::BeginPolygon() |
---|
| 1127 | { |
---|
| 1128 | // Commence drawing of a polygon. |
---|
| 1129 | |
---|
| 1130 | glBegin(GL_POLYGON); |
---|
| 1131 | } |
---|
| 1132 | |
---|
| 1133 | void GLACanvas::EndPolygon() |
---|
| 1134 | { |
---|
| 1135 | // Finish drawing of a polygon. |
---|
[096e56c] | 1136 | |
---|
[45aa1d6] | 1137 | glEnd(); |
---|
[9baa53a] | 1138 | CHECK_GL_ERROR("EndPolygon", "glEnd GL_POLYGON"); |
---|
[45aa1d6] | 1139 | } |
---|
| 1140 | |
---|
[56da40e] | 1141 | void GLACanvas::PlaceVertex(glaCoord x, glaCoord y, glaCoord z) |
---|
| 1142 | { |
---|
| 1143 | // Place a vertex for the current object being drawn. |
---|
| 1144 | |
---|
[edb6576] | 1145 | #ifdef GLA_DEBUG |
---|
| 1146 | m_Vertices++; |
---|
| 1147 | #endif |
---|
[56da40e] | 1148 | glVertex3d(x, y, z); |
---|
| 1149 | } |
---|
| 1150 | |
---|
[f336ab9] | 1151 | void GLACanvas::PlaceVertex(glaCoord x, glaCoord y, glaCoord z, |
---|
| 1152 | glaTexCoord tex_x, glaTexCoord tex_y) |
---|
[b839829] | 1153 | { |
---|
| 1154 | // Place a vertex for the current object being drawn. |
---|
| 1155 | |
---|
| 1156 | #ifdef GLA_DEBUG |
---|
| 1157 | m_Vertices++; |
---|
| 1158 | #endif |
---|
| 1159 | glTexCoord2i(tex_x, tex_y); |
---|
| 1160 | glVertex3d(x, y, z); |
---|
| 1161 | } |
---|
| 1162 | |
---|
[56da40e] | 1163 | void GLACanvas::PlaceIndicatorVertex(glaCoord x, glaCoord y) |
---|
| 1164 | { |
---|
| 1165 | // Place a vertex for the current indicator object being drawn. |
---|
| 1166 | |
---|
[087bc72] | 1167 | PlaceVertex(x, y, 0.0); |
---|
[56da40e] | 1168 | } |
---|
| 1169 | |
---|
[e633bb1] | 1170 | void GLACanvas::BeginBlobs() |
---|
[d9b3270] | 1171 | { |
---|
[fe075d7] | 1172 | // Commence drawing of a set of blobs. |
---|
[cab6f11] | 1173 | if (blob_method == SPRITE) { |
---|
| 1174 | glPushAttrib(GL_ENABLE_BIT|GL_POINT_BIT); |
---|
| 1175 | CHECK_GL_ERROR("BeginBlobs", "glPushAttrib"); |
---|
| 1176 | glBindTexture(GL_TEXTURE_2D, m_BlobTexture); |
---|
| 1177 | CHECK_GL_ERROR("BeginBlobs", "glBindTexture"); |
---|
| 1178 | glEnable(GL_ALPHA_TEST); |
---|
| 1179 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_ALPHA_TEST"); |
---|
| 1180 | glPointSize(8); |
---|
| 1181 | CHECK_GL_ERROR("BeginBlobs", "glPointSize"); |
---|
| 1182 | glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE); |
---|
| 1183 | CHECK_GL_ERROR("BeginBlobs", "glTexEnvi GL_POINT_SPRITE"); |
---|
| 1184 | glEnable(GL_TEXTURE_2D); |
---|
| 1185 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_TEXTURE_2D"); |
---|
| 1186 | glEnable(GL_POINT_SPRITE); |
---|
| 1187 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_POINT_SPRITE"); |
---|
| 1188 | glBegin(GL_POINTS); |
---|
| 1189 | } else if (blob_method == POINT) { |
---|
[78924eb] | 1190 | glPushAttrib(GL_ENABLE_BIT); |
---|
| 1191 | CHECK_GL_ERROR("BeginBlobs", "glPushAttrib"); |
---|
[4ba80e0] | 1192 | glEnable(GL_ALPHA_TEST); |
---|
| 1193 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_ALPHA_TEST"); |
---|
| 1194 | glEnable(GL_POINT_SMOOTH); |
---|
| 1195 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_POINT_SMOOTH"); |
---|
| 1196 | glBegin(GL_POINTS); |
---|
| 1197 | } else { |
---|
[6662d02] | 1198 | glPushAttrib(GL_TRANSFORM_BIT|GL_VIEWPORT_BIT|GL_ENABLE_BIT); |
---|
[4ba80e0] | 1199 | CHECK_GL_ERROR("BeginBlobs", "glPushAttrib"); |
---|
| 1200 | SetIndicatorTransform(); |
---|
[6f5f9e5] | 1201 | glEnable(GL_DEPTH_TEST); |
---|
| 1202 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_DEPTH_TEST"); |
---|
[bde8c9a] | 1203 | glBegin(GL_LINES); |
---|
[4ba80e0] | 1204 | } |
---|
[e633bb1] | 1205 | } |
---|
[d9b3270] | 1206 | |
---|
[e633bb1] | 1207 | void GLACanvas::EndBlobs() |
---|
| 1208 | { |
---|
[bde8c9a] | 1209 | // Finish drawing of a set of blobs. |
---|
| 1210 | glEnd(); |
---|
[cab6f11] | 1211 | if (blob_method != LINES) { |
---|
[bde8c9a] | 1212 | CHECK_GL_ERROR("EndBlobs", "glEnd GL_POINTS"); |
---|
| 1213 | } else { |
---|
| 1214 | CHECK_GL_ERROR("EndBlobs", "glEnd GL_LINES"); |
---|
[4ba80e0] | 1215 | } |
---|
[78924eb] | 1216 | glPopAttrib(); |
---|
| 1217 | CHECK_GL_ERROR("EndBlobs", "glPopAttrib"); |
---|
[e633bb1] | 1218 | } |
---|
[d9b3270] | 1219 | |
---|
[e633bb1] | 1220 | void GLACanvas::DrawBlob(glaCoord x, glaCoord y, glaCoord z) |
---|
| 1221 | { |
---|
[cab6f11] | 1222 | if (blob_method != LINES) { |
---|
[4ba80e0] | 1223 | // Draw a marker. |
---|
| 1224 | PlaceVertex(x, y, z); |
---|
| 1225 | } else { |
---|
[f6d8375] | 1226 | double X, Y, Z; |
---|
[d67450e] | 1227 | if (!Transform(Vector3(x, y, z), &X, &Y, &Z)) { |
---|
[4ba80e0] | 1228 | printf("bad transform\n"); |
---|
| 1229 | return; |
---|
| 1230 | } |
---|
| 1231 | // Stuff behind us (in perspective view) will get clipped, |
---|
| 1232 | // but we can save effort with a cheap check here. |
---|
| 1233 | if (Z <= 0) return; |
---|
| 1234 | |
---|
[bde8c9a] | 1235 | X -= BLOB_DIAMETER * 0.5; |
---|
| 1236 | Y -= BLOB_DIAMETER * 0.5; |
---|
| 1237 | |
---|
| 1238 | PlaceVertex(X, Y + 1, Z); |
---|
| 1239 | PlaceVertex(X, Y + (BLOB_DIAMETER - 1), Z); |
---|
| 1240 | |
---|
| 1241 | for (int i = 1; i < (BLOB_DIAMETER - 1); ++i) { |
---|
| 1242 | PlaceVertex(X + i, Y, Z); |
---|
| 1243 | PlaceVertex(X + i, Y + BLOB_DIAMETER, Z); |
---|
| 1244 | } |
---|
| 1245 | |
---|
| 1246 | PlaceVertex(X + (BLOB_DIAMETER - 1), Y + 1, Z); |
---|
| 1247 | PlaceVertex(X + (BLOB_DIAMETER - 1), Y + (BLOB_DIAMETER - 1), Z); |
---|
[78924eb] | 1248 | } |
---|
[95ce35f] | 1249 | #ifdef GLA_DEBUG |
---|
[78924eb] | 1250 | m_Vertices++; |
---|
[95ce35f] | 1251 | #endif |
---|
[429465a] | 1252 | } |
---|
| 1253 | |
---|
[81aea4e] | 1254 | void GLACanvas::DrawBlob(glaCoord x, glaCoord y) |
---|
| 1255 | { |
---|
[cab6f11] | 1256 | if (blob_method != LINES) { |
---|
[81aea4e] | 1257 | // Draw a marker. |
---|
| 1258 | PlaceVertex(x, y, 0); |
---|
| 1259 | } else { |
---|
[bde8c9a] | 1260 | x -= BLOB_DIAMETER * 0.5; |
---|
| 1261 | y -= BLOB_DIAMETER * 0.5; |
---|
| 1262 | |
---|
| 1263 | PlaceVertex(x, y + 1, 0); |
---|
| 1264 | PlaceVertex(x, y + (BLOB_DIAMETER - 1), 0); |
---|
| 1265 | |
---|
| 1266 | for (int i = 1; i < (BLOB_DIAMETER - 1); ++i) { |
---|
| 1267 | PlaceVertex(x + i, y, 0); |
---|
| 1268 | PlaceVertex(x + i, y + BLOB_DIAMETER, 0); |
---|
| 1269 | } |
---|
| 1270 | |
---|
| 1271 | PlaceVertex(x + (BLOB_DIAMETER - 1), y + 1, 0); |
---|
| 1272 | PlaceVertex(x + (BLOB_DIAMETER - 1), y + (BLOB_DIAMETER - 1), 0); |
---|
[81aea4e] | 1273 | } |
---|
| 1274 | #ifdef GLA_DEBUG |
---|
| 1275 | m_Vertices++; |
---|
| 1276 | #endif |
---|
| 1277 | } |
---|
| 1278 | |
---|
[86fe6e4] | 1279 | void GLACanvas::BeginCrosses() |
---|
| 1280 | { |
---|
[95ce35f] | 1281 | // Plot crosses. |
---|
[fe075d7] | 1282 | if (cross_method == SPRITE) { |
---|
[95ce35f] | 1283 | glPushAttrib(GL_ENABLE_BIT|GL_POINT_BIT); |
---|
[9baa53a] | 1284 | CHECK_GL_ERROR("BeginCrosses", "glPushAttrib"); |
---|
[95ce35f] | 1285 | glBindTexture(GL_TEXTURE_2D, m_CrossTexture); |
---|
[9baa53a] | 1286 | CHECK_GL_ERROR("BeginCrosses", "glBindTexture"); |
---|
[95ce35f] | 1287 | glEnable(GL_ALPHA_TEST); |
---|
[9baa53a] | 1288 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_ALPHA_TEST"); |
---|
[95ce35f] | 1289 | glPointSize(8); |
---|
[9baa53a] | 1290 | CHECK_GL_ERROR("BeginCrosses", "glPointSize"); |
---|
| 1291 | glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE); |
---|
| 1292 | CHECK_GL_ERROR("BeginCrosses", "glTexEnvi GL_POINT_SPRITE"); |
---|
[95ce35f] | 1293 | glEnable(GL_TEXTURE_2D); |
---|
[9baa53a] | 1294 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_TEXTURE_2D"); |
---|
| 1295 | glEnable(GL_POINT_SPRITE); |
---|
| 1296 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_POINT_SPRITE"); |
---|
[95ce35f] | 1297 | glBegin(GL_POINTS); |
---|
| 1298 | } else { |
---|
| 1299 | // To get the crosses to appear at a constant size and orientation on |
---|
| 1300 | // screen, we plot them in the Indicator transform coordinates (which |
---|
| 1301 | // unfortunately means they can't be usefully put in an opengl display |
---|
| 1302 | // list). |
---|
[6662d02] | 1303 | glPushAttrib(GL_TRANSFORM_BIT|GL_VIEWPORT_BIT|GL_ENABLE_BIT); |
---|
[9baa53a] | 1304 | CHECK_GL_ERROR("BeginCrosses", "glPushAttrib 2"); |
---|
[95ce35f] | 1305 | SetIndicatorTransform(); |
---|
[6f5f9e5] | 1306 | glEnable(GL_DEPTH_TEST); |
---|
[9baa53a] | 1307 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_DEPTH_TEST"); |
---|
[95ce35f] | 1308 | glBegin(GL_LINES); |
---|
| 1309 | } |
---|
[86fe6e4] | 1310 | } |
---|
| 1311 | |
---|
| 1312 | void GLACanvas::EndCrosses() |
---|
| 1313 | { |
---|
[95ce35f] | 1314 | glEnd(); |
---|
[fe075d7] | 1315 | if (cross_method == SPRITE) { |
---|
[9baa53a] | 1316 | CHECK_GL_ERROR("EndCrosses", "glEnd GL_POINTS"); |
---|
| 1317 | } else { |
---|
| 1318 | CHECK_GL_ERROR("EndCrosses", "glEnd GL_LINES"); |
---|
| 1319 | } |
---|
[86fe6e4] | 1320 | glPopAttrib(); |
---|
| 1321 | CHECK_GL_ERROR("EndCrosses", "glPopAttrib"); |
---|
| 1322 | } |
---|
| 1323 | |
---|
| 1324 | void GLACanvas::DrawCross(glaCoord x, glaCoord y, glaCoord z) |
---|
| 1325 | { |
---|
[fe075d7] | 1326 | if (cross_method == SPRITE) { |
---|
[7e1da12] | 1327 | // Draw a marker. |
---|
[95ce35f] | 1328 | PlaceVertex(x, y, z); |
---|
| 1329 | } else { |
---|
[f6d8375] | 1330 | double X, Y, Z; |
---|
[d67450e] | 1331 | if (!Transform(Vector3(x, y, z), &X, &Y, &Z)) { |
---|
[95ce35f] | 1332 | printf("bad transform\n"); |
---|
| 1333 | return; |
---|
| 1334 | } |
---|
| 1335 | // Stuff behind us (in perspective view) will get clipped, |
---|
| 1336 | // but we can save effort with a cheap check here. |
---|
[7e1da12] | 1337 | if (Z <= 0) return; |
---|
| 1338 | |
---|
| 1339 | // Round to integers before adding on the offsets for the |
---|
| 1340 | // cross arms to avoid uneven crosses. |
---|
| 1341 | X = rint(X); |
---|
| 1342 | Y = rint(Y); |
---|
| 1343 | PlaceVertex(X - 3, Y - 3, Z); |
---|
| 1344 | PlaceVertex(X + 3, Y + 3, Z); |
---|
| 1345 | PlaceVertex(X - 3, Y + 3, Z); |
---|
| 1346 | PlaceVertex(X + 3, Y - 3, Z); |
---|
[86fe6e4] | 1347 | } |
---|
[78924eb] | 1348 | #ifdef GLA_DEBUG |
---|
| 1349 | m_Vertices++; |
---|
| 1350 | #endif |
---|
[86fe6e4] | 1351 | } |
---|
| 1352 | |
---|
[e633bb1] | 1353 | void GLACanvas::DrawRing(glaCoord x, glaCoord y) |
---|
[429465a] | 1354 | { |
---|
| 1355 | // Draw an unfilled circle |
---|
[096e56c] | 1356 | const Double radius = 4; |
---|
[429465a] | 1357 | assert(m_Quadric); |
---|
[78924eb] | 1358 | glMatrixMode(GL_MODELVIEW); |
---|
| 1359 | CHECK_GL_ERROR("DrawRing", "glMatrixMode"); |
---|
| 1360 | glPushMatrix(); |
---|
| 1361 | CHECK_GL_ERROR("DrawRing", "glPushMatrix"); |
---|
[429465a] | 1362 | glTranslated(x, y, 0.0); |
---|
| 1363 | CHECK_GL_ERROR("DrawRing", "glTranslated"); |
---|
| 1364 | gluDisk(m_Quadric, radius - 1.0, radius, 12, 1); |
---|
| 1365 | CHECK_GL_ERROR("DrawRing", "gluDisk"); |
---|
[78924eb] | 1366 | glPopMatrix(); |
---|
| 1367 | CHECK_GL_ERROR("DrawRing", "glPopMatrix"); |
---|
[d9b3270] | 1368 | } |
---|
| 1369 | |
---|
[aa048c3] | 1370 | void GLACanvas::DrawRectangle(gla_colour edge, gla_colour fill, |
---|
[b49ac56] | 1371 | glaCoord x0, glaCoord y0, glaCoord w, glaCoord h) |
---|
[56da40e] | 1372 | { |
---|
| 1373 | // Draw a filled rectangle with an edge in the indicator plane. |
---|
[ca8c864] | 1374 | // (x0, y0) specify the bottom-left corner of the rectangle and (w, h) the |
---|
| 1375 | // size. |
---|
[56da40e] | 1376 | |
---|
[c10dd28] | 1377 | SetColour(fill); |
---|
[aa048c3] | 1378 | BeginQuadrilaterals(); |
---|
[56da40e] | 1379 | PlaceIndicatorVertex(x0, y0); |
---|
| 1380 | PlaceIndicatorVertex(x0 + w, y0); |
---|
| 1381 | PlaceIndicatorVertex(x0 + w, y0 + h); |
---|
| 1382 | PlaceIndicatorVertex(x0, y0 + h); |
---|
| 1383 | EndQuadrilaterals(); |
---|
| 1384 | |
---|
[aa048c3] | 1385 | if (edge != fill) { |
---|
[b49ac56] | 1386 | SetColour(edge); |
---|
| 1387 | BeginLines(); |
---|
| 1388 | PlaceIndicatorVertex(x0, y0); |
---|
| 1389 | PlaceIndicatorVertex(x0 + w, y0); |
---|
| 1390 | PlaceIndicatorVertex(x0 + w, y0 + h); |
---|
| 1391 | PlaceIndicatorVertex(x0, y0 + h); |
---|
| 1392 | EndLines(); |
---|
[c10dd28] | 1393 | } |
---|
[56da40e] | 1394 | } |
---|
| 1395 | |
---|
[aa048c3] | 1396 | void |
---|
| 1397 | GLACanvas::DrawShadedRectangle(const GLAPen & fill_bot, const GLAPen & fill_top, |
---|
| 1398 | glaCoord x0, glaCoord y0, |
---|
| 1399 | glaCoord w, glaCoord h) |
---|
| 1400 | { |
---|
| 1401 | // Draw a graduated filled rectangle in the indicator plane. |
---|
| 1402 | // (x0, y0) specify the bottom-left corner of the rectangle and (w, h) the |
---|
| 1403 | // size. |
---|
| 1404 | |
---|
[02aa4d4] | 1405 | glShadeModel(GL_SMOOTH); |
---|
[9baa53a] | 1406 | CHECK_GL_ERROR("DrawShadedRectangle", "glShadeModel GL_SMOOTH"); |
---|
[aa048c3] | 1407 | BeginQuadrilaterals(); |
---|
| 1408 | SetColour(fill_bot); |
---|
| 1409 | PlaceIndicatorVertex(x0, y0); |
---|
| 1410 | PlaceIndicatorVertex(x0 + w, y0); |
---|
| 1411 | SetColour(fill_top); |
---|
| 1412 | PlaceIndicatorVertex(x0 + w, y0 + h); |
---|
| 1413 | PlaceIndicatorVertex(x0, y0 + h); |
---|
| 1414 | EndQuadrilaterals(); |
---|
[02aa4d4] | 1415 | glShadeModel(GL_FLAT); |
---|
[9baa53a] | 1416 | CHECK_GL_ERROR("DrawShadedRectangle", "glShadeModel GL_FLAT"); |
---|
[aa048c3] | 1417 | } |
---|
| 1418 | |
---|
| 1419 | void GLACanvas::DrawCircle(gla_colour edge, gla_colour fill, |
---|
| 1420 | glaCoord cx, glaCoord cy, glaCoord radius) |
---|
[56da40e] | 1421 | { |
---|
[087bc72] | 1422 | // Draw a filled circle with an edge. |
---|
[56da40e] | 1423 | SetColour(fill); |
---|
[78924eb] | 1424 | glMatrixMode(GL_MODELVIEW); |
---|
| 1425 | CHECK_GL_ERROR("DrawCircle", "glMatrixMode"); |
---|
| 1426 | glPushMatrix(); |
---|
| 1427 | CHECK_GL_ERROR("DrawCircle", "glPushMatrix"); |
---|
[56da40e] | 1428 | glTranslated(cx, cy, 0.0); |
---|
[8326157] | 1429 | CHECK_GL_ERROR("DrawCircle", "glTranslated"); |
---|
[1b12b82] | 1430 | assert(m_Quadric); |
---|
| 1431 | gluDisk(m_Quadric, 0.0, radius, 36, 1); |
---|
[8326157] | 1432 | CHECK_GL_ERROR("DrawCircle", "gluDisk"); |
---|
[56da40e] | 1433 | SetColour(edge); |
---|
[1b12b82] | 1434 | gluDisk(m_Quadric, radius - 1.0, radius, 36, 1); |
---|
[8326157] | 1435 | CHECK_GL_ERROR("DrawCircle", "gluDisk (2)"); |
---|
[78924eb] | 1436 | glPopMatrix(); |
---|
| 1437 | CHECK_GL_ERROR("DrawCircle", "glPopMatrix"); |
---|
[56da40e] | 1438 | } |
---|
| 1439 | |
---|
[aa048c3] | 1440 | void GLACanvas::DrawSemicircle(gla_colour edge, gla_colour fill, |
---|
[b49ac56] | 1441 | glaCoord cx, glaCoord cy, |
---|
| 1442 | glaCoord radius, glaCoord start) |
---|
[56da40e] | 1443 | { |
---|
| 1444 | // Draw a filled semicircle with an edge. |
---|
[ca8c864] | 1445 | // The semicircle extends from "start" deg to "start"+180 deg (increasing |
---|
| 1446 | // clockwise, 0 deg upwards). |
---|
[56da40e] | 1447 | SetColour(fill); |
---|
[78924eb] | 1448 | glMatrixMode(GL_MODELVIEW); |
---|
| 1449 | CHECK_GL_ERROR("DrawSemicircle", "glMatrixMode"); |
---|
| 1450 | glPushMatrix(); |
---|
| 1451 | CHECK_GL_ERROR("DrawSemicircle", "glPushMatrix"); |
---|
[56da40e] | 1452 | glTranslated(cx, cy, 0.0); |
---|
[78924eb] | 1453 | CHECK_GL_ERROR("DrawSemicircle", "glTranslated"); |
---|
[1b12b82] | 1454 | assert(m_Quadric); |
---|
| 1455 | gluPartialDisk(m_Quadric, 0.0, radius, 36, 1, start, 180.0); |
---|
[78924eb] | 1456 | CHECK_GL_ERROR("DrawSemicircle", "gluPartialDisk"); |
---|
[56da40e] | 1457 | SetColour(edge); |
---|
[1b12b82] | 1458 | gluPartialDisk(m_Quadric, radius - 1.0, radius, 36, 1, start, 180.0); |
---|
[78924eb] | 1459 | CHECK_GL_ERROR("DrawSemicircle", "gluPartialDisk (2)"); |
---|
| 1460 | glPopMatrix(); |
---|
| 1461 | CHECK_GL_ERROR("DrawSemicircle", "glPopMatrix"); |
---|
[56da40e] | 1462 | } |
---|
| 1463 | |
---|
[d67450e] | 1464 | void |
---|
| 1465 | GLACanvas::DrawTriangle(gla_colour edge, gla_colour fill, |
---|
| 1466 | const Vector3 &p0, const Vector3 &p1, const Vector3 &p2) |
---|
[56da40e] | 1467 | { |
---|
[ca8c864] | 1468 | // Draw a filled triangle with an edge. |
---|
[096e56c] | 1469 | |
---|
[56da40e] | 1470 | SetColour(fill); |
---|
| 1471 | BeginTriangles(); |
---|
[d67450e] | 1472 | PlaceIndicatorVertex(p0.GetX(), p0.GetY()); |
---|
| 1473 | PlaceIndicatorVertex(p1.GetX(), p1.GetY()); |
---|
| 1474 | PlaceIndicatorVertex(p2.GetX(), p2.GetY()); |
---|
[56da40e] | 1475 | EndTriangles(); |
---|
| 1476 | |
---|
| 1477 | SetColour(edge); |
---|
[d67450e] | 1478 | glBegin(GL_LINE_STRIP); |
---|
| 1479 | PlaceIndicatorVertex(p0.GetX(), p0.GetY()); |
---|
| 1480 | PlaceIndicatorVertex(p1.GetX(), p1.GetY()); |
---|
| 1481 | PlaceIndicatorVertex(p2.GetX(), p2.GetY()); |
---|
| 1482 | glEnd(); |
---|
[9baa53a] | 1483 | CHECK_GL_ERROR("DrawTriangle", "glEnd GL_LINE_STRIP"); |
---|
[56da40e] | 1484 | } |
---|
| 1485 | |
---|
| 1486 | void GLACanvas::EnableDashedLines() |
---|
| 1487 | { |
---|
| 1488 | // Enable dashed lines, and start drawing in them. |
---|
| 1489 | |
---|
[9eb58d0] | 1490 | glLineStipple(1, 0x3333); |
---|
[8326157] | 1491 | CHECK_GL_ERROR("EnableDashedLines", "glLineStipple"); |
---|
[56da40e] | 1492 | glEnable(GL_LINE_STIPPLE); |
---|
[bb1f293] | 1493 | CHECK_GL_ERROR("EnableDashedLines", "glEnable GL_LINE_STIPPLE"); |
---|
[56da40e] | 1494 | } |
---|
| 1495 | |
---|
| 1496 | void GLACanvas::DisableDashedLines() |
---|
| 1497 | { |
---|
| 1498 | glDisable(GL_LINE_STIPPLE); |
---|
[bb1f293] | 1499 | CHECK_GL_ERROR("DisableDashedLines", "glDisable GL_LINE_STIPPLE"); |
---|
[56da40e] | 1500 | } |
---|
| 1501 | |
---|
[d67450e] | 1502 | bool GLACanvas::Transform(const Vector3 & v, |
---|
[f6d8375] | 1503 | double* x_out, double* y_out, double* z_out) const |
---|
[56da40e] | 1504 | { |
---|
| 1505 | // Convert from data coordinates to screen coordinates. |
---|
[096e56c] | 1506 | |
---|
[087bc72] | 1507 | // Perform the projection. |
---|
[d67450e] | 1508 | return gluProject(v.GetX(), v.GetY(), v.GetZ(), |
---|
| 1509 | modelview_matrix, projection_matrix, viewport, |
---|
[6adffadf] | 1510 | x_out, y_out, z_out); |
---|
[56da40e] | 1511 | } |
---|
| 1512 | |
---|
[1b12b82] | 1513 | void GLACanvas::ReverseTransform(Double x, Double y, |
---|
[f6d8375] | 1514 | double* x_out, double* y_out, double* z_out) const |
---|
[a2b3d62] | 1515 | { |
---|
| 1516 | // Convert from screen coordinates to data coordinates. |
---|
[096e56c] | 1517 | |
---|
[a2b3d62] | 1518 | // Perform the projection. |
---|
[1b12b82] | 1519 | gluUnProject(x, y, 0.0, modelview_matrix, projection_matrix, viewport, |
---|
[b49ac56] | 1520 | x_out, y_out, z_out); |
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[8326157] | 1521 | CHECK_GL_ERROR("ReverseTransform", "gluUnProject"); |
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[a2b3d62] | 1522 | } |
---|
| 1523 | |
---|
[e7f9e99] | 1524 | Double GLACanvas::SurveyUnitsAcrossViewport() const |
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[087bc72] | 1525 | { |
---|
[8326157] | 1526 | // Measure the current viewport in survey units, taking into account the |
---|
| 1527 | // current display scale. |
---|
[087bc72] | 1528 | |
---|
[9eb58d0] | 1529 | assert(m_Scale != 0.0); |
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[db59b02] | 1530 | list_flags |= INVALIDATE_ON_SCALE; |
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[c5fc8eb] | 1531 | return m_VolumeDiameter / m_Scale; |
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[087bc72] | 1532 | } |
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[045e2af] | 1533 | |
---|
[d67450e] | 1534 | void GLACanvas::ToggleSmoothShading() |
---|
| 1535 | { |
---|
| 1536 | m_SmoothShading = !m_SmoothShading; |
---|
| 1537 | } |
---|
| 1538 | |
---|
[a517825] | 1539 | void GLACanvas::ToggleTextured() |
---|
| 1540 | { |
---|
| 1541 | m_Textured = !m_Textured; |
---|
| 1542 | if (m_Textured && m_Texture == 0) { |
---|
| 1543 | glGenTextures(1, &m_Texture); |
---|
| 1544 | CHECK_GL_ERROR("ToggleTextured", "glGenTextures"); |
---|
| 1545 | |
---|
| 1546 | glBindTexture(GL_TEXTURE_2D, m_Texture); |
---|
| 1547 | CHECK_GL_ERROR("ToggleTextured", "glBindTexture"); |
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| 1548 | |
---|
| 1549 | ::wxInitAllImageHandlers(); |
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[5627cbb] | 1550 | |
---|
[a517825] | 1551 | wxImage img; |
---|
[8a05a7a] | 1552 | wxString texture(wmsg_cfgpth()); |
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[5627cbb] | 1553 | texture += wxCONFIG_PATH_SEPARATOR; |
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[09dfd18] | 1554 | texture += wxT("images"); |
---|
[5627cbb] | 1555 | texture += wxCONFIG_PATH_SEPARATOR; |
---|
| 1556 | texture += wxT("texture.png"); |
---|
| 1557 | if (!img.LoadFile(texture, wxBITMAP_TYPE_PNG)) { |
---|
[a517825] | 1558 | // FIXME |
---|
| 1559 | fprintf(stderr, "Couldn't load image.\n"); |
---|
| 1560 | exit(1); |
---|
| 1561 | } |
---|
[5627cbb] | 1562 | |
---|
[ecbdd96] | 1563 | // Generate mipmaps. |
---|
[7c18431] | 1564 | gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGB, // was GL_LUMINANCE |
---|
[ecbdd96] | 1565 | img.GetWidth(), img.GetHeight(), |
---|
| 1566 | GL_RGB, GL_UNSIGNED_BYTE, img.GetData()); |
---|
| 1567 | CHECK_GL_ERROR("ToggleTextured", "gluBuild2DMipmaps"); |
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[a517825] | 1568 | |
---|
| 1569 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
---|
| 1570 | CHECK_GL_ERROR("ToggleTextured", "glTexEnvi"); |
---|
| 1571 | } |
---|
| 1572 | } |
---|
| 1573 | |
---|
[1ada489] | 1574 | bool GLACanvas::SaveScreenshot(const wxString & fnm, wxBitmapType type) const |
---|
[045e2af] | 1575 | { |
---|
[6cf4daa] | 1576 | const int width = x_size; |
---|
| 1577 | const int height = y_size; |
---|
[1bd4841] | 1578 | unsigned char *pixels = (unsigned char *)malloc(3 * width * (height + 1)); |
---|
[045e2af] | 1579 | if (!pixels) return false; |
---|
| 1580 | glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *)pixels); |
---|
[a106530] | 1581 | CHECK_GL_ERROR("SaveScreenshot", "glReadPixels"); |
---|
[1bd4841] | 1582 | unsigned char * tmp_row = pixels + 3 * width * height; |
---|
| 1583 | // We need to flip the image vertically - this approach should be more |
---|
| 1584 | // efficient than using wxImage::Mirror(false) as that creates a new |
---|
| 1585 | // wxImage object. |
---|
| 1586 | for (int y = height / 2 - 1; y >= 0; --y) { |
---|
| 1587 | unsigned char * upper = pixels + 3 * width * y; |
---|
| 1588 | unsigned char * lower = pixels + 3 * width * (height - y - 1); |
---|
| 1589 | memcpy(tmp_row, upper, 3 * width); |
---|
| 1590 | memcpy(upper, lower, 3 * width); |
---|
| 1591 | memcpy(lower, tmp_row, 3 * width); |
---|
| 1592 | } |
---|
| 1593 | // NB wxImage constructor calls free(pixels) for us. |
---|
[045e2af] | 1594 | wxImage grab(width, height, pixels); |
---|
[1bd4841] | 1595 | return grab.SaveFile(fnm, type); |
---|
[045e2af] | 1596 | } |
---|
[807f9dd] | 1597 | |
---|
| 1598 | bool GLACanvas::CheckVisualFidelity(const unsigned char * target) const |
---|
| 1599 | { |
---|
| 1600 | unsigned char pixels[3 * 8 * 8]; |
---|
[c8f449c] | 1601 | if (double_buffered) { |
---|
| 1602 | glReadBuffer(GL_BACK); |
---|
| 1603 | CHECK_GL_ERROR("FirstShow", "glReadBuffer"); |
---|
| 1604 | } |
---|
[edfaf35] | 1605 | glReadPixels(x_size / 2 - 4, y_size / 2 - 5, 8, 8, |
---|
[6cf4daa] | 1606 | GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *)pixels); |
---|
[a106530] | 1607 | CHECK_GL_ERROR("CheckVisualFidelity", "glReadPixels"); |
---|
[c8f449c] | 1608 | if (double_buffered) { |
---|
| 1609 | glReadBuffer(GL_FRONT); |
---|
| 1610 | CHECK_GL_ERROR("FirstShow", "glReadBuffer"); |
---|
| 1611 | } |
---|
[4f7f965] | 1612 | #if 0 |
---|
| 1613 | // Show what got drawn and what was expected for debugging. |
---|
| 1614 | for (int y = 0; y < 8; ++y) { |
---|
| 1615 | for (int x = 0; x < 8; ++x) { |
---|
| 1616 | int o = (y * 8 + x) * 3; |
---|
| 1617 | printf("%c", pixels[o] ? 'X' : '.'); |
---|
| 1618 | } |
---|
| 1619 | printf(" "); |
---|
| 1620 | for (int x = 0; x < 8; ++x) { |
---|
| 1621 | int o = (y * 8 + x) * 3; |
---|
| 1622 | printf("%c", target[o] ? 'X' : '.'); |
---|
| 1623 | } |
---|
| 1624 | printf("\n"); |
---|
| 1625 | } |
---|
| 1626 | #endif |
---|
[807f9dd] | 1627 | return (memcmp(pixels, target, sizeof(pixels)) == 0); |
---|
| 1628 | } |
---|
[aea4f8b] | 1629 | |
---|
| 1630 | void GLACanvas::ReadPixels(int width, int height, unsigned char * buf) const |
---|
| 1631 | { |
---|
[a106530] | 1632 | CHECK_GL_ERROR("ReadPixels", "glReadPixels"); |
---|
[aea4f8b] | 1633 | glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *)buf); |
---|
| 1634 | } |
---|
[f9ca87c] | 1635 | |
---|
| 1636 | void GLACanvas::PolygonOffset(bool on) const |
---|
| 1637 | { |
---|
| 1638 | if (on) { |
---|
| 1639 | glPolygonOffset(1.0, 1.0); |
---|
| 1640 | glEnable(GL_POLYGON_OFFSET_FILL); |
---|
| 1641 | } else { |
---|
| 1642 | glDisable(GL_POLYGON_OFFSET_FILL); |
---|
| 1643 | } |
---|
| 1644 | } |
---|