[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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[08253d9] | 7 | // Copyright (C) 2003,2004,2005,2006,2007 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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| 21 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 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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[b72f4b5] | 38 | #ifdef __APPLE__ |
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| 39 | #include <OpenGL/glext.h> |
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| 40 | #else |
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[f960f23] | 41 | #include <GL/glext.h> |
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[b72f4b5] | 42 | #endif |
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[f960f23] | 43 | |
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[b05f516] | 44 | #ifndef GL_POINT_SIZE_MAX |
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| 45 | #define GL_POINT_SIZE_MAX 0x8127 |
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| 46 | #endif |
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[9baa53a] | 47 | #ifndef GL_POINT_SPRITE |
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| 48 | #define GL_POINT_SPRITE 0x8861 |
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[f960f23] | 49 | #endif |
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[9baa53a] | 50 | #ifndef GL_COORD_REPLACE |
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| 51 | #define GL_COORD_REPLACE 0x8862 |
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[f960f23] | 52 | #endif |
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| 53 | |
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[1eeb55a] | 54 | #ifndef USE_FNT |
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[d587ab1] | 55 | // Some WIN32 stupidity which causes mingw to fail to link for some reason; |
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[87cab10] | 56 | // doing this probably means we can't safely use atexit() - see the comments in |
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| 57 | // glut.h if you can take the full horror... |
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[d587ab1] | 58 | #define GLUT_DISABLE_ATEXIT_HACK |
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[c616110] | 59 | // For glutBitmapLength() |
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| 60 | #define GLUT_API_VERSION 4 |
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[b72f4b5] | 61 | #ifdef __APPLE__ |
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| 62 | #include <OpenGL/glut.h> |
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| 63 | #else |
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[cbfa50d] | 64 | #include <GL/glut.h> |
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[b72f4b5] | 65 | #endif |
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[fc4ee5b] | 66 | #ifdef FREEGLUT |
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| 67 | #include <GL/freeglut_ext.h> |
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| 68 | #endif |
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[1eeb55a] | 69 | #endif |
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[56da40e] | 70 | |
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[87cab10] | 71 | using namespace std; |
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| 72 | |
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[4ba80e0] | 73 | const double BLOB_DIAMETER = 5.0; |
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| 74 | |
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[4f3e5d1] | 75 | static bool opengl_initialised = false; |
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| 76 | |
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[5627cbb] | 77 | string GetGLSystemDescription() |
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[cc1a1d9] | 78 | { |
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[4f3e5d1] | 79 | // If OpenGL isn't initialised we may get a SEGV from glGetString. |
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| 80 | if (!opengl_initialised) |
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| 81 | return "No OpenGL information available yet - try opening a file."; |
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[cc1a1d9] | 82 | const char *p = (const char*)glGetString(GL_VERSION); |
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[4f3e5d1] | 83 | if (!p) |
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| 84 | return "Couldn't read OpenGL version!"; |
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[cc1a1d9] | 85 | |
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[5627cbb] | 86 | string info; |
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[cc1a1d9] | 87 | info += "OpenGL "; |
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| 88 | info += p; |
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| 89 | info += '\n'; |
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| 90 | info += (const char*)glGetString(GL_VENDOR); |
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| 91 | info += '\n'; |
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| 92 | info += (const char*)glGetString(GL_RENDERER); |
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| 93 | info += '\n'; |
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| 94 | |
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| 95 | GLint red, green, blue; |
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| 96 | glGetIntegerv(GL_RED_BITS, &red); |
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| 97 | glGetIntegerv(GL_GREEN_BITS, &green); |
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| 98 | glGetIntegerv(GL_BLUE_BITS, &blue); |
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| 99 | GLint max_texture_size; |
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| 100 | glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size); |
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| 101 | GLint max_viewport[2]; |
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| 102 | glGetIntegerv(GL_MAX_VIEWPORT_DIMS, max_viewport); |
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| 103 | GLdouble point_size_range[2]; |
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| 104 | glGetDoublev(GL_POINT_SIZE_RANGE, point_size_range); |
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| 105 | GLdouble point_size_granularity; |
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| 106 | glGetDoublev(GL_POINT_SIZE_GRANULARITY, &point_size_granularity); |
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[5627cbb] | 107 | info += string_format("R%dG%dB%d\n" |
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[cc1a1d9] | 108 | "Max Texture size: %dx%d\n" |
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| 109 | "Max Viewport size: %dx%d\n" |
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| 110 | "Point Size %.3f-%.3f (granularity %.3f)", |
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| 111 | (int)red, (int)green, (int)blue, |
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| 112 | (int)max_texture_size, (int)max_texture_size, |
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| 113 | (int)max_viewport[0], (int)max_viewport[1], |
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| 114 | point_size_range[0], point_size_range[1], |
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| 115 | point_size_granularity); |
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[5627cbb] | 116 | |
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| 117 | const GLubyte* gl_extensions = glGetString(GL_EXTENSIONS); |
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| 118 | if (*gl_extensions) { |
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| 119 | info += '\n'; |
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| 120 | info += (const char*)gl_extensions; |
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| 121 | } |
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[cc1a1d9] | 122 | return info; |
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| 123 | } |
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| 124 | |
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[1b12b82] | 125 | // Important: CHECK_GL_ERROR must not be called within a glBegin()/glEnd() pair |
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| 126 | // (thus it must not be called from BeginLines(), etc., or within a |
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| 127 | // BeginLines()/EndLines() block etc.) |
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[335a9be] | 128 | #define CHECK_GL_ERROR(M, F) do { \ |
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| 129 | GLenum error_code_ = glGetError(); \ |
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| 130 | if (error_code_ != GL_NO_ERROR) \ |
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[5627cbb] | 131 | wxLogError(wxT(__FILE__":"STRING(__LINE__)": OpenGL error: %s " \ |
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| 132 | "(call "F" in method "M")"), \ |
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| 133 | wxString((const char *)gluErrorString(error_code_), \ |
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| 134 | wxConvUTF8).c_str()); \ |
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[335a9be] | 135 | } while (0) |
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[1897247] | 136 | |
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[56da40e] | 137 | // |
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| 138 | // GLAPen |
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[096e56c] | 139 | // |
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[56da40e] | 140 | |
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[aa048c3] | 141 | GLAPen::GLAPen() |
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[56da40e] | 142 | { |
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[aa048c3] | 143 | components[0] = components[1] = components[2] = 0.0; |
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[56da40e] | 144 | } |
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| 145 | |
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| 146 | GLAPen::~GLAPen() |
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| 147 | { |
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| 148 | } |
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| 149 | |
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| 150 | void GLAPen::SetColour(double red, double green, double blue) |
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| 151 | { |
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[aa048c3] | 152 | components[0] = red; |
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| 153 | components[1] = green; |
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| 154 | components[2] = blue; |
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[56da40e] | 155 | } |
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| 156 | |
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[f7ea0e1] | 157 | double GLAPen::GetRed() const |
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[56da40e] | 158 | { |
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[aa048c3] | 159 | return components[0]; |
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[56da40e] | 160 | } |
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| 161 | |
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[f7ea0e1] | 162 | double GLAPen::GetGreen() const |
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[56da40e] | 163 | { |
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[aa048c3] | 164 | return components[1]; |
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[56da40e] | 165 | } |
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| 166 | |
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[f7ea0e1] | 167 | double GLAPen::GetBlue() const |
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[56da40e] | 168 | { |
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[aa048c3] | 169 | return components[2]; |
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[56da40e] | 170 | } |
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| 171 | |
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[f383708] | 172 | void GLAPen::Interpolate(const GLAPen& pen, double how_far) |
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| 173 | { |
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[aa048c3] | 174 | components[0] = how_far * (pen.GetRed() - components[0]) + components[0]; |
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| 175 | components[1] = how_far * (pen.GetGreen() - components[1]) + components[1]; |
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| 176 | components[2] = how_far * (pen.GetBlue() - components[2]) + components[2]; |
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| 177 | } |
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| 178 | |
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| 179 | struct ColourTriple { |
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| 180 | // RGB triple: values are from 0-255 inclusive for each component. |
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| 181 | unsigned char r, g, b; |
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| 182 | }; |
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| 183 | |
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| 184 | // These must be in the same order as the entries in COLOURS[] below. |
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| 185 | const ColourTriple COLOURS[] = { |
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| 186 | { 0, 0, 0 }, // black |
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| 187 | { 100, 100, 100 }, // grey |
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| 188 | { 180, 180, 180 }, // light grey |
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| 189 | { 140, 140, 140 }, // light grey 2 |
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| 190 | { 90, 90, 90 }, // dark grey |
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| 191 | { 255, 255, 255 }, // white |
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| 192 | { 0, 100, 255}, // turquoise |
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| 193 | { 0, 255, 40 }, // green |
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| 194 | { 150, 205, 224 }, // indicator 1 |
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| 195 | { 114, 149, 160 }, // indicator 2 |
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| 196 | { 255, 255, 0 }, // yellow |
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| 197 | { 255, 0, 0 }, // red |
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[f4c5932] | 198 | { 40, 40, 255 }, // blue |
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[aa048c3] | 199 | }; |
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[f383708] | 200 | |
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[db59b02] | 201 | void GLAList::DrawList() const { |
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| 202 | glCallList(gl_list); |
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| 203 | CHECK_GL_ERROR("GLAList::DrawList", "glCallList"); |
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| 204 | } |
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| 205 | |
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| 206 | void GLAList::InvalidateList() { |
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| 207 | glDeleteLists(gl_list, 1); |
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| 208 | CHECK_GL_ERROR("GLAList::InvalidateList", "glDeleteLists"); |
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| 209 | |
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| 210 | // And flag this list as requiring generation before use. |
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| 211 | gl_list = 0; |
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| 212 | } |
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| 213 | |
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[56da40e] | 214 | // |
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| 215 | // GLACanvas |
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[096e56c] | 216 | // |
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[56da40e] | 217 | |
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[1eeb55a] | 218 | #ifndef USE_FNT |
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[203d2a7] | 219 | void* const GLACanvas::m_Font = GLUT_BITMAP_HELVETICA_10; |
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| 220 | const int GLACanvas::m_FontSize = 10; |
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[1eeb55a] | 221 | #endif |
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[203d2a7] | 222 | |
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[84f1ed1] | 223 | // Pass wxWANTS_CHARS so that the window gets cursor keys on MS Windows. |
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| 224 | GLACanvas::GLACanvas(wxWindow* parent, int id) |
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[d67450e] | 225 | : wxGLCanvas(parent, id, wxDefaultPosition, wxDefaultSize, wxWANTS_CHARS), |
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| 226 | m_Translation() |
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[56da40e] | 227 | { |
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| 228 | // Constructor. |
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| 229 | |
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[1b12b82] | 230 | m_Quadric = NULL; |
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[08253d9] | 231 | m_Pan = 0.0; |
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| 232 | m_Tilt = 0.0; |
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[9eb58d0] | 233 | m_Scale = 0.0; |
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[c5fc8eb] | 234 | m_VolumeDiameter = 1.0; |
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[d67450e] | 235 | m_SmoothShading = false; |
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[a517825] | 236 | m_Texture = 0; |
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| 237 | m_Textured = false; |
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[6abab84] | 238 | m_Perspective = false; |
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[c60062d] | 239 | m_Fog = false; |
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[db452ae] | 240 | m_AntiAlias = false; |
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[db59b02] | 241 | list_flags = 0; |
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[56da40e] | 242 | } |
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| 243 | |
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| 244 | GLACanvas::~GLACanvas() |
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| 245 | { |
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| 246 | // Destructor. |
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| 247 | |
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[1b12b82] | 248 | if (m_Quadric) { |
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| 249 | gluDeleteQuadric(m_Quadric); |
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| 250 | CHECK_GL_ERROR("~GLACanvas", "gluDeleteQuadric"); |
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| 251 | } |
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| 252 | } |
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| 253 | |
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| 254 | void GLACanvas::FirstShow() |
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| 255 | { |
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[db59b02] | 256 | SetCurrent(); |
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[4f3e5d1] | 257 | opengl_initialised = true; |
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[db59b02] | 258 | |
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| 259 | // Clear any cached OpenGL lists. |
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| 260 | vector<GLAList>::iterator i; |
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| 261 | for (i = drawing_lists.begin(); i != drawing_lists.end(); ++i) { |
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| 262 | if (*i) i->InvalidateList(); |
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| 263 | } |
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| 264 | drawing_lists.resize(0); |
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| 265 | |
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[4f3e5d1] | 266 | if (m_Quadric) return; |
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| 267 | // One time initialisation follows. |
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[657402d] | 268 | |
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[1b12b82] | 269 | m_Quadric = gluNewQuadric(); |
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[bb1f293] | 270 | CHECK_GL_ERROR("FirstShow", "gluNewQuadric"); |
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[1b12b82] | 271 | if (!m_Quadric) { |
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| 272 | abort(); // FIXME need to cope somehow |
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| 273 | } |
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[096e56c] | 274 | |
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[203d2a7] | 275 | glShadeModel(GL_FLAT); |
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[dde4fe7] | 276 | CHECK_GL_ERROR("FirstShow", "glShadeModel"); |
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[d67450e] | 277 | glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); // So text works. |
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[dde4fe7] | 278 | CHECK_GL_ERROR("FirstShow", "glPolygonMode"); |
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[e633bb1] | 279 | //glAlphaFunc(GL_GREATER, 0.5f); |
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| 280 | //CHECK_GL_ERROR("FirstShow", "glAlphaFunc"); |
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[096e56c] | 281 | |
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[c60062d] | 282 | // Grey fog effect. |
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| 283 | GLfloat fogcolour[4] = { 0.5, 0.5, 0.5, 1.0 }; |
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| 284 | glFogfv(GL_FOG_COLOR, fogcolour); |
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[9baa53a] | 285 | CHECK_GL_ERROR("FirstShow", "glFogfv"); |
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[c60062d] | 286 | |
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| 287 | // Linear fogging. |
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| 288 | glFogi(GL_FOG_MODE, GL_LINEAR); |
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[9baa53a] | 289 | CHECK_GL_ERROR("FirstShow", "glFogi"); |
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[c60062d] | 290 | |
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| 291 | // Optimise for speed (compute fog per vertex). |
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| 292 | glHint(GL_FOG_HINT, GL_FASTEST); |
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[9baa53a] | 293 | CHECK_GL_ERROR("FirstShow", "glHint"); |
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[1eeb55a] | 294 | |
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[a517825] | 295 | // No padding on pixel packing and unpacking (default is to pad each |
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| 296 | // line to a multiple of 4 bytes). |
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| 297 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // For setting texture maps. |
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[028829f] | 298 | CHECK_GL_ERROR("FirstShow", "glPixelStorei GL_UNPACK_ALIGNMENT"); |
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[a517825] | 299 | glPixelStorei(GL_PACK_ALIGNMENT, 1); // For screengrabs and movies. |
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[028829f] | 300 | CHECK_GL_ERROR("FirstShow", "glPixelStorei GL_PACK_ALIGNMENT"); |
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| 301 | |
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[1eeb55a] | 302 | #ifdef USE_FNT |
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| 303 | // Load font |
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[8a05a7a] | 304 | wxString path = wmsg_cfgpth(); |
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[bd551c0] | 305 | path += wxCONFIG_PATH_SEPARATOR; |
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[5627cbb] | 306 | path += wxT("aven.txf"); |
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[d3172cc] | 307 | // FIXME: This should really use fn_str() - currently we probably can't |
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| 308 | // save to a Unicode path on wxmsw. |
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| 309 | m_Font.load(path.char_str()); |
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[1eeb55a] | 310 | #endif |
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[4ba80e0] | 311 | |
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| 312 | // Check if we can use GL_POINTS to plot blobs at stations. |
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| 313 | GLdouble point_size_range[2]; |
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| 314 | glGetDoublev(GL_POINT_SIZE_RANGE, point_size_range); |
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| 315 | CHECK_GL_ERROR("FirstShow", "glGetDoublev GL_POINT_SIZE_RANGE"); |
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| 316 | glpoint_ok = (point_size_range[0] <= BLOB_DIAMETER && |
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| 317 | point_size_range[1] >= BLOB_DIAMETER); |
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| 318 | if (glpoint_ok) { |
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| 319 | glPointSize(BLOB_DIAMETER); |
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| 320 | CHECK_GL_ERROR("FirstShow", "glPointSize"); |
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| 321 | } |
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[95ce35f] | 322 | |
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[185d793] | 323 | // Point sprites provide an easy, fast way for us to draw crosses by |
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| 324 | // texture mapping GL points. |
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| 325 | // |
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[81aea4e] | 326 | // If we have OpenGL >= 2.0 then we definitely have GL_POINT_SPRITE. |
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[185d793] | 327 | // Otherwise see if we have the GL_ARB_point_sprite or GL_NV_point_sprite |
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| 328 | // extensions. |
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| 329 | // |
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| 330 | // The symbolic constants GL_POINT_SPRITE, GL_POINT_SPRITE_ARB, and |
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| 331 | // GL_POINT_SPRITE_NV all give the same number so it doesn't matter |
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| 332 | // which we use. |
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| 333 | float maxSize = 0.0f; |
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| 334 | glGetFloatv(GL_POINT_SIZE_MAX, &maxSize); |
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| 335 | if (maxSize >= 8) { |
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| 336 | glpoint_sprite = (atoi((const char *)glGetString(GL_VERSION)) >= 2); |
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| 337 | if (!glpoint_sprite) { |
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| 338 | const char * p = (const char *)glGetString(GL_EXTENSIONS); |
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| 339 | while (true) { |
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[ff8de60] | 340 | size_t l = 0; |
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[185d793] | 341 | if (memcmp(p, "GL_ARB_point_sprite", 19) == 0) { |
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[ff8de60] | 342 | l = 19; |
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[185d793] | 343 | } else if (memcmp(p, "GL_NV_point_sprite", 18) == 0) { |
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[ff8de60] | 344 | l = 18; |
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[185d793] | 345 | } |
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[ff8de60] | 346 | if (l) { |
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| 347 | p += l; |
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| 348 | if (*p == '\0' || *p == ' ') { |
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| 349 | glpoint_sprite = true; |
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| 350 | break; |
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| 351 | } |
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[185d793] | 352 | } |
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| 353 | p = strchr(p + 1, ' '); |
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| 354 | if (!p) break; |
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| 355 | ++p; |
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| 356 | } |
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| 357 | } |
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[95ce35f] | 358 | } |
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[185d793] | 359 | |
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[95ce35f] | 360 | if (glpoint_sprite) { |
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| 361 | glGenTextures(1, &m_CrossTexture); |
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[9baa53a] | 362 | CHECK_GL_ERROR("FirstShow", "glGenTextures"); |
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[95ce35f] | 363 | glBindTexture(GL_TEXTURE_2D, m_CrossTexture); |
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[9baa53a] | 364 | CHECK_GL_ERROR("FirstShow", "glBindTexture"); |
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[95ce35f] | 365 | const unsigned char crossteximage[128] = { |
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| 366 | 255,255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,255,255, |
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| 367 | 0, 0,255,255, 0, 0, 0, 0, 0, 0, 0, 0,255,255, 0, 0, |
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| 368 | 0, 0, 0, 0,255,255, 0, 0, 0, 0,255,255, 0, 0, 0, 0, |
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| 369 | 0, 0, 0, 0, 0, 0,255,255,255,255, 0, 0, 0, 0, 0, 0, |
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| 370 | 0, 0, 0, 0, 0, 0,255,255,255,255, 0, 0, 0, 0, 0, 0, |
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| 371 | 0, 0, 0, 0,255,255, 0, 0, 0, 0,255,255, 0, 0, 0, 0, |
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| 372 | 0, 0,255,255, 0, 0, 0, 0, 0, 0, 0, 0,255,255, 0, 0, |
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| 373 | 255,255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,255,255 |
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| 374 | }; |
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| 375 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
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[9baa53a] | 376 | CHECK_GL_ERROR("FirstShow", "glPixelStorei"); |
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[95ce35f] | 377 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
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[9baa53a] | 378 | CHECK_GL_ERROR("FirstShow", "glTexEnvi"); |
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[95ce35f] | 379 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); |
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[9baa53a] | 380 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_WRAP_S"); |
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[95ce35f] | 381 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); |
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[9baa53a] | 382 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_WRAP_T"); |
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[95ce35f] | 383 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, 8, 8, 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, (GLvoid *)crossteximage); |
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[9baa53a] | 384 | CHECK_GL_ERROR("FirstShow", "glTexImage2D"); |
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[95ce35f] | 385 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
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[9baa53a] | 386 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
---|
[95ce35f] | 387 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
---|
[9baa53a] | 388 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
[95ce35f] | 389 | } |
---|
[185d793] | 390 | //if (glpoint_ok) printf("Using GL_POINTS for blobs\n"); |
---|
| 391 | //if (glpoint_sprite) printf("Using GL_POINT_SPRITE* for crosses"); |
---|
[ca8c864] | 392 | } |
---|
| 393 | |
---|
[56da40e] | 394 | void GLACanvas::Clear() |
---|
| 395 | { |
---|
| 396 | // Clear the canvas. |
---|
[d727368] | 397 | |
---|
[56da40e] | 398 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
---|
[1897247] | 399 | CHECK_GL_ERROR("Clear", "glClear"); |
---|
[56da40e] | 400 | } |
---|
| 401 | |
---|
| 402 | void GLACanvas::SetScale(Double scale) |
---|
| 403 | { |
---|
[db59b02] | 404 | if (scale != m_Scale) { |
---|
| 405 | vector<GLAList>::iterator i; |
---|
| 406 | for (i = drawing_lists.begin(); i != drawing_lists.end(); ++i) { |
---|
| 407 | if (*i && i->test_flag(INVALIDATE_ON_SCALE)) i->InvalidateList(); |
---|
| 408 | } |
---|
| 409 | |
---|
| 410 | m_Scale = scale; |
---|
| 411 | } |
---|
[56da40e] | 412 | } |
---|
| 413 | |
---|
| 414 | void GLACanvas::AddTranslationScreenCoordinates(int dx, int dy) |
---|
| 415 | { |
---|
| 416 | // Translate the data by a given amount, specified in screen coordinates. |
---|
[096e56c] | 417 | |
---|
[56da40e] | 418 | // Find out how far the translation takes us in data coordinates. |
---|
| 419 | SetDataTransform(); |
---|
| 420 | |
---|
| 421 | Double x0, y0, z0; |
---|
| 422 | Double x, y, z; |
---|
[1b12b82] | 423 | gluUnProject(0.0, 0.0, 0.0, modelview_matrix, projection_matrix, viewport, |
---|
| 424 | &x0, &y0, &z0); |
---|
[bb1f293] | 425 | CHECK_GL_ERROR("AddTranslationScreenCoordinates", "gluUnProject"); |
---|
[1b12b82] | 426 | gluUnProject(dx, -dy, 0.0, modelview_matrix, projection_matrix, viewport, |
---|
| 427 | &x, &y, &z); |
---|
[bb1f293] | 428 | CHECK_GL_ERROR("AddTranslationScreenCoordinates", "gluUnProject (2)"); |
---|
[56da40e] | 429 | |
---|
| 430 | // Apply the translation. |
---|
[d67450e] | 431 | AddTranslation(Vector3(x - x0, y - y0, z - z0)); |
---|
[56da40e] | 432 | } |
---|
| 433 | |
---|
[c5fc8eb] | 434 | void GLACanvas::SetVolumeDiameter(glaCoord diameter) |
---|
[56da40e] | 435 | { |
---|
[c5fc8eb] | 436 | // Set the size of the data drawing volume by giving the diameter of the |
---|
| 437 | // smallest sphere containing it. |
---|
[56da40e] | 438 | |
---|
[5eab797] | 439 | m_VolumeDiameter = max(1.0, diameter); |
---|
[56da40e] | 440 | } |
---|
| 441 | |
---|
| 442 | void GLACanvas::StartDrawing() |
---|
| 443 | { |
---|
| 444 | // Prepare for a redraw operation. |
---|
[096e56c] | 445 | |
---|
[203d2a7] | 446 | SetCurrent(); |
---|
| 447 | glDepthMask(true); |
---|
[56da40e] | 448 | } |
---|
| 449 | |
---|
[d67450e] | 450 | void GLACanvas::EnableSmoothPolygons(bool filled) |
---|
[1b12b82] | 451 | { |
---|
| 452 | // Prepare for drawing smoothly-shaded polygons. |
---|
| 453 | // Only use this when required (in particular lines in lists may not be |
---|
| 454 | // coloured correctly when this is enabled). |
---|
[096e56c] | 455 | |
---|
[d67450e] | 456 | glPushAttrib(GL_ENABLE_BIT|GL_LIGHTING_BIT|GL_POLYGON_BIT); |
---|
| 457 | if (filled) { |
---|
| 458 | glShadeModel(GL_SMOOTH); |
---|
| 459 | glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
---|
| 460 | } else { |
---|
| 461 | glDisable(GL_LINE_SMOOTH); |
---|
| 462 | glDisable(GL_TEXTURE_2D); |
---|
| 463 | glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); |
---|
| 464 | } |
---|
| 465 | CHECK_GL_ERROR("EnableSmoothPolygons", "glPolygonMode"); |
---|
| 466 | |
---|
| 467 | if (filled && m_SmoothShading) { |
---|
| 468 | static const GLfloat mat_specular[] = { 0.2, 0.2, 0.2, 1.0 }; |
---|
| 469 | static const GLfloat light_position[] = { -1.0, -1.0, -1.0, 0.0 }; |
---|
| 470 | static const GLfloat light_ambient[] = { 0.3, 0.3, 0.3, 1.0 }; |
---|
| 471 | static const GLfloat light_diffuse[] = { 0.7, 0.7, 0.7, 1.0 }; |
---|
| 472 | glEnable(GL_COLOR_MATERIAL); |
---|
| 473 | glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, mat_specular); |
---|
| 474 | glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 10.0); |
---|
| 475 | glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient); |
---|
| 476 | glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse); |
---|
| 477 | glLightfv(GL_LIGHT0, GL_POSITION, light_position); |
---|
| 478 | glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE); |
---|
| 479 | glEnable(GL_LIGHTING); |
---|
| 480 | glEnable(GL_LIGHT0); |
---|
| 481 | } |
---|
[1b12b82] | 482 | } |
---|
| 483 | |
---|
| 484 | void GLACanvas::DisableSmoothPolygons() |
---|
| 485 | { |
---|
[d67450e] | 486 | glPopAttrib(); |
---|
[203d2a7] | 487 | } |
---|
| 488 | |
---|
[d67450e] | 489 | void GLACanvas::PlaceNormal(const Vector3 &v) |
---|
[203d2a7] | 490 | { |
---|
| 491 | // Add a normal (for polygons etc.) |
---|
| 492 | |
---|
[d67450e] | 493 | glNormal3d(v.GetX(), v.GetY(), v.GetZ()); |
---|
[1b12b82] | 494 | } |
---|
| 495 | |
---|
[56da40e] | 496 | void GLACanvas::SetDataTransform() |
---|
| 497 | { |
---|
[de24f93] | 498 | // Set viewport. The width and height go to zero when the panel is dragged |
---|
| 499 | // right across so we clamp them to be at least 1 to avoid errors from the |
---|
| 500 | // opengl calls below. |
---|
| 501 | int window_width; |
---|
| 502 | int window_height; |
---|
| 503 | GetSize(&window_width, &window_height); |
---|
| 504 | if (window_height < 1) window_height = 1; |
---|
| 505 | if (window_width < 1) window_width = 1; |
---|
| 506 | double aspect = double(window_height) / double(window_width); |
---|
| 507 | |
---|
| 508 | glViewport(0, 0, window_width, window_height); |
---|
| 509 | CHECK_GL_ERROR("SetDataTransform", "glViewport"); |
---|
| 510 | |
---|
| 511 | // Set projection. |
---|
| 512 | glMatrixMode(GL_PROJECTION); |
---|
| 513 | CHECK_GL_ERROR("SetDataTransform", "glMatrixMode"); |
---|
| 514 | glLoadIdentity(); |
---|
| 515 | CHECK_GL_ERROR("SetDataTransform", "glLoadIdentity"); |
---|
| 516 | |
---|
[d877aa2] | 517 | Double near_plane = 1.0; |
---|
[de24f93] | 518 | if (m_Perspective) { |
---|
[e577f89] | 519 | Double lr = near_plane * tan(rad(25.0)); |
---|
[d877aa2] | 520 | Double far_plane = m_VolumeDiameter * 5 + near_plane; // FIXME: work out properly |
---|
| 521 | Double tb = lr * aspect; |
---|
[de24f93] | 522 | glFrustum(-lr, lr, -tb, tb, near_plane, far_plane); |
---|
| 523 | CHECK_GL_ERROR("SetViewportAndProjection", "glFrustum"); |
---|
| 524 | } else { |
---|
[5092ee7] | 525 | near_plane = 0.0; |
---|
[d877aa2] | 526 | assert(m_Scale != 0.0); |
---|
| 527 | Double lr = m_VolumeDiameter / m_Scale * 0.5; |
---|
| 528 | Double far_plane = m_VolumeDiameter + near_plane; |
---|
| 529 | Double tb = lr * aspect; |
---|
[de24f93] | 530 | glOrtho(-lr, lr, -tb, tb, near_plane, far_plane); |
---|
| 531 | CHECK_GL_ERROR("SetViewportAndProjection", "glOrtho"); |
---|
| 532 | } |
---|
| 533 | |
---|
[56da40e] | 534 | // Set the modelview transform for drawing data. |
---|
| 535 | glMatrixMode(GL_MODELVIEW); |
---|
[1897247] | 536 | CHECK_GL_ERROR("SetDataTransform", "glMatrixMode"); |
---|
[56da40e] | 537 | glLoadIdentity(); |
---|
[1897247] | 538 | CHECK_GL_ERROR("SetDataTransform", "glLoadIdentity"); |
---|
[d877aa2] | 539 | if (m_Perspective) { |
---|
| 540 | glTranslated(0.0, 0.0, -near_plane); |
---|
| 541 | } else { |
---|
| 542 | glTranslated(0.0, 0.0, -0.5 * m_VolumeDiameter); |
---|
| 543 | } |
---|
[1bbd9a8] | 544 | CHECK_GL_ERROR("SetDataTransform", "glTranslated"); |
---|
[2491b8c] | 545 | // Get axes the correct way around (z upwards, y into screen) |
---|
| 546 | glRotated(-90.0, 1.0, 0.0, 0.0); |
---|
| 547 | CHECK_GL_ERROR("SetDataTransform", "glRotated"); |
---|
[08253d9] | 548 | glRotated(m_Tilt, 1.0, 0.0, 0.0); |
---|
| 549 | CHECK_GL_ERROR("SetDataTransform", "glRotated"); |
---|
| 550 | glRotated(m_Pan, 0.0, 0.0, 1.0); |
---|
[2491b8c] | 551 | CHECK_GL_ERROR("SetDataTransform", "CopyToOpenGL"); |
---|
[5092ee7] | 552 | if (m_Perspective) { |
---|
[d67450e] | 553 | glTranslated(m_Translation.GetX(), |
---|
| 554 | m_Translation.GetY(), |
---|
| 555 | m_Translation.GetZ()); |
---|
[5092ee7] | 556 | CHECK_GL_ERROR("SetDataTransform", "glTranslated"); |
---|
| 557 | } |
---|
[dde4fe7] | 558 | |
---|
[de24f93] | 559 | // Save projection matrix. |
---|
| 560 | glGetDoublev(GL_PROJECTION_MATRIX, projection_matrix); |
---|
| 561 | CHECK_GL_ERROR("SetDataTransform", "glGetDoublev"); |
---|
| 562 | |
---|
| 563 | // Save viewport coordinates. |
---|
| 564 | glGetIntegerv(GL_VIEWPORT, viewport); |
---|
| 565 | CHECK_GL_ERROR("SetDataTransform", "glGetIntegerv"); |
---|
| 566 | |
---|
| 567 | // Save modelview matrix. |
---|
[dde4fe7] | 568 | glGetDoublev(GL_MODELVIEW_MATRIX, modelview_matrix); |
---|
| 569 | CHECK_GL_ERROR("SetDataTransform", "glGetDoublev"); |
---|
[de24f93] | 570 | |
---|
[5092ee7] | 571 | if (!m_Perspective) { |
---|
| 572 | // Adjust the translation so we don't change the Z position of the model |
---|
| 573 | Double X, Y, Z; |
---|
[d67450e] | 574 | gluProject(m_Translation.GetX(), |
---|
| 575 | m_Translation.GetY(), |
---|
| 576 | m_Translation.GetZ(), |
---|
[5092ee7] | 577 | modelview_matrix, projection_matrix, viewport, |
---|
| 578 | &X, &Y, &Z); |
---|
| 579 | Double Tx, Ty, Tz; |
---|
| 580 | gluUnProject(X, Y, 0.5, modelview_matrix, projection_matrix, viewport, |
---|
| 581 | &Tx, &Ty, &Tz); |
---|
| 582 | glTranslated(Tx, Ty, Tz); |
---|
| 583 | CHECK_GL_ERROR("SetDataTransform", "glTranslated"); |
---|
| 584 | glGetDoublev(GL_MODELVIEW_MATRIX, modelview_matrix); |
---|
| 585 | } |
---|
[096e56c] | 586 | |
---|
[de24f93] | 587 | glEnable(GL_DEPTH_TEST); |
---|
| 588 | CHECK_GL_ERROR("SetDataTransform", "glEnable GL_DEPTH_TEST"); |
---|
[c60062d] | 589 | |
---|
[a517825] | 590 | if (m_Textured) { |
---|
| 591 | glBindTexture(GL_TEXTURE_2D, m_Texture); |
---|
| 592 | glEnable(GL_TEXTURE_2D); |
---|
| 593 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); |
---|
| 594 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_WRAP_S"); |
---|
| 595 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); |
---|
| 596 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_WRAP_T"); |
---|
| 597 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
---|
| 598 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
---|
[ecbdd96] | 599 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, |
---|
| 600 | GL_LINEAR_MIPMAP_LINEAR); |
---|
[a517825] | 601 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
| 602 | glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); |
---|
| 603 | } else { |
---|
| 604 | glDisable(GL_TEXTURE_2D); |
---|
| 605 | } |
---|
[c60062d] | 606 | if (m_Fog) { |
---|
| 607 | glFogf(GL_FOG_START, near_plane); |
---|
| 608 | glFogf(GL_FOG_END, near_plane + m_VolumeDiameter); |
---|
| 609 | glEnable(GL_FOG); |
---|
[db452ae] | 610 | } else { |
---|
| 611 | glDisable(GL_FOG); |
---|
| 612 | } |
---|
| 613 | |
---|
| 614 | if (m_AntiAlias) { |
---|
| 615 | glEnable(GL_LINE_SMOOTH); |
---|
[e4d40792] | 616 | glEnable(GL_BLEND); |
---|
| 617 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
---|
[db452ae] | 618 | } else { |
---|
| 619 | glDisable(GL_LINE_SMOOTH); |
---|
[c60062d] | 620 | } |
---|
[56da40e] | 621 | } |
---|
| 622 | |
---|
| 623 | void GLACanvas::SetIndicatorTransform() |
---|
| 624 | { |
---|
[db59b02] | 625 | list_flags |= NEVER_CACHE; |
---|
| 626 | |
---|
[bb1f293] | 627 | // Set the modelview transform and projection for drawing indicators. |
---|
[56da40e] | 628 | wxSize size = GetSize(); |
---|
[bb1f293] | 629 | int window_width = max(size.GetWidth(), 1); |
---|
| 630 | int window_height = max(size.GetHeight(), 1); |
---|
[56da40e] | 631 | |
---|
[bb1f293] | 632 | glDisable(GL_DEPTH_TEST); |
---|
| 633 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_DEPTH_TEST"); |
---|
[c60062d] | 634 | glDisable(GL_FOG); |
---|
| 635 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_FOG"); |
---|
[bb1f293] | 636 | |
---|
[78924eb] | 637 | // Just a simple 2D projection. |
---|
[bb1f293] | 638 | glMatrixMode(GL_PROJECTION); |
---|
| 639 | CHECK_GL_ERROR("SetIndicatorTransform", "glMatrixMode"); |
---|
| 640 | glLoadIdentity(); |
---|
| 641 | CHECK_GL_ERROR("SetIndicatorTransform", "glLoadIdentity (2)"); |
---|
[1eeb55a] | 642 | gluOrtho2D(0, window_width, 0, window_height); |
---|
[bb1f293] | 643 | CHECK_GL_ERROR("SetIndicatorTransform", "gluOrtho2D"); |
---|
[a517825] | 644 | |
---|
[78924eb] | 645 | // No modelview transform. |
---|
| 646 | glMatrixMode(GL_MODELVIEW); |
---|
| 647 | CHECK_GL_ERROR("SetIndicatorTransform", "glMatrixMode"); |
---|
| 648 | glLoadIdentity(); |
---|
| 649 | CHECK_GL_ERROR("SetIndicatorTransform", "glLoadIdentity"); |
---|
| 650 | |
---|
[a517825] | 651 | glDisable(GL_TEXTURE_2D); |
---|
[6adffadf] | 652 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_TEXTURE_2D"); |
---|
[e4d40792] | 653 | glDisable(GL_BLEND); |
---|
[6adffadf] | 654 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_BLEND"); |
---|
[36c3285] | 655 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); |
---|
[9baa53a] | 656 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_WRAP_S"); |
---|
[36c3285] | 657 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); |
---|
[9baa53a] | 658 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_WRAP_T"); |
---|
[36c3285] | 659 | glAlphaFunc(GL_GREATER, 0.5f); |
---|
[9baa53a] | 660 | CHECK_GL_ERROR("SetIndicatorTransform", "glAlphaFunc"); |
---|
[096e56c] | 661 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
---|
[9baa53a] | 662 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
---|
[36c3285] | 663 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
---|
[9baa53a] | 664 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
[36c3285] | 665 | glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST); |
---|
[9baa53a] | 666 | CHECK_GL_ERROR("SetIndicatorTransform", "glHint"); |
---|
[56da40e] | 667 | } |
---|
| 668 | |
---|
| 669 | void GLACanvas::FinishDrawing() |
---|
| 670 | { |
---|
| 671 | // Complete a redraw operation. |
---|
[096e56c] | 672 | |
---|
[203d2a7] | 673 | // glFlush(); |
---|
| 674 | // CHECK_GL_ERROR("FinishDrawing", "glFlush"); |
---|
[56da40e] | 675 | SwapBuffers(); |
---|
| 676 | } |
---|
| 677 | |
---|
[d2fcc9b] | 678 | void GLACanvas::DrawList(unsigned int l) |
---|
[56da40e] | 679 | { |
---|
[4ba80e0] | 680 | // FIXME: uncomment to disable use of lists for debugging: |
---|
| 681 | // GenerateList(l); return; |
---|
[d2fcc9b] | 682 | if (l >= drawing_lists.size()) drawing_lists.resize(l + 1); |
---|
[bae6a7c] | 683 | |
---|
[d2fcc9b] | 684 | // We generate the OpenGL lists lazily to minimise delays on startup. |
---|
| 685 | // So check if we need to generate the OpenGL list now. |
---|
[db59b02] | 686 | if (!drawing_lists[l] && !drawing_lists[l].test_flag(NEVER_CACHE)) { |
---|
[bae6a7c] | 687 | // Create a new OpenGL list to hold this sequence of drawing |
---|
| 688 | // operations. |
---|
[d2fcc9b] | 689 | GLuint list = glGenLists(1); |
---|
[6adffadf] | 690 | #ifdef GLA_DEBUG |
---|
[d2fcc9b] | 691 | printf("new list #%d: %d... ", l, list); |
---|
| 692 | m_Vertices = 0; |
---|
[6adffadf] | 693 | #endif |
---|
[9baa53a] | 694 | CHECK_GL_ERROR("DrawList", "glGenLists"); |
---|
[c071520] | 695 | if (list == 0) { |
---|
| 696 | // If we can't create a list, fall back to just drawing directly. |
---|
| 697 | GenerateList(l); |
---|
| 698 | return; |
---|
| 699 | } |
---|
[096e56c] | 700 | |
---|
[6f5f9e5] | 701 | // We should have 256 lists for font drawing and a dozen or so for 2D |
---|
| 702 | // and 3D lists. So something is amiss if we've generated 1000 lists, |
---|
| 703 | // probably a infinite loop in the lazy list mechanism. |
---|
| 704 | assert(list < 1000); |
---|
| 705 | |
---|
[d2fcc9b] | 706 | // http://www.opengl.org/resources/faq/technical/displaylist.htm |
---|
| 707 | // advises: |
---|
| 708 | // "Stay away from GL_COMPILE_AND_EXECUTE mode. Instead, create the |
---|
| 709 | // list using GL_COMPILE mode, then execute it with glCallList()." |
---|
[bae6a7c] | 710 | glNewList(list, GL_COMPILE); |
---|
[9baa53a] | 711 | CHECK_GL_ERROR("DrawList", "glNewList"); |
---|
[db59b02] | 712 | // Clear list_flags so that we can note what conditions to invalidate |
---|
| 713 | // the cached OpenGL list on. |
---|
| 714 | list_flags = 0; |
---|
[d2fcc9b] | 715 | GenerateList(l); |
---|
[bae6a7c] | 716 | glEndList(); |
---|
[9baa53a] | 717 | CHECK_GL_ERROR("DrawList", "glEndList"); |
---|
[edb6576] | 718 | #ifdef GLA_DEBUG |
---|
[bae6a7c] | 719 | printf("done (%d vertices)\n", m_Vertices); |
---|
[edb6576] | 720 | #endif |
---|
[db59b02] | 721 | drawing_lists[l] = GLAList(list, list_flags); |
---|
[bae6a7c] | 722 | } |
---|
[ee78822] | 723 | |
---|
[db59b02] | 724 | if (drawing_lists[l].test_flag(NEVER_CACHE)) { |
---|
| 725 | // That list can't be cached. |
---|
| 726 | GenerateList(l); |
---|
| 727 | } else { |
---|
| 728 | // Perform the operations specified by the OpenGL display list. |
---|
| 729 | drawing_lists[l].DrawList(); |
---|
| 730 | } |
---|
[56da40e] | 731 | } |
---|
| 732 | |
---|
[76dd228] | 733 | void GLACanvas::DrawList2D(unsigned int l, glaCoord x, glaCoord y, Double rotation) |
---|
| 734 | { |
---|
| 735 | glMatrixMode(GL_PROJECTION); |
---|
| 736 | CHECK_GL_ERROR("DrawList2D", "glMatrixMode"); |
---|
| 737 | glPushMatrix(); |
---|
| 738 | CHECK_GL_ERROR("DrawList2D", "glPushMatrix"); |
---|
| 739 | glTranslated(x, y, 0); |
---|
| 740 | CHECK_GL_ERROR("DrawList2D", "glTranslated"); |
---|
| 741 | if (rotation != 0.0) { |
---|
| 742 | glRotated(rotation, 0, 0, -1); |
---|
| 743 | CHECK_GL_ERROR("DrawList2D", "glRotated"); |
---|
| 744 | } |
---|
| 745 | DrawList(l); |
---|
| 746 | glMatrixMode(GL_PROJECTION); |
---|
| 747 | CHECK_GL_ERROR("DrawList2D", "glMatrixMode 2"); |
---|
| 748 | glPopMatrix(); |
---|
| 749 | CHECK_GL_ERROR("DrawList2D", "glPopMatrix"); |
---|
| 750 | } |
---|
| 751 | |
---|
[d2fcc9b] | 752 | void GLACanvas::InvalidateList(unsigned int l) |
---|
[56da40e] | 753 | { |
---|
[d2fcc9b] | 754 | if (l < drawing_lists.size() && drawing_lists[l]) { |
---|
[bae6a7c] | 755 | // Delete any existing OpenGL list. |
---|
[db59b02] | 756 | drawing_lists[l].InvalidateList(); |
---|
[37d7084] | 757 | } |
---|
| 758 | } |
---|
| 759 | |
---|
[56da40e] | 760 | void GLACanvas::SetBackgroundColour(float red, float green, float blue) |
---|
| 761 | { |
---|
| 762 | // Set the background colour of the canvas. |
---|
[096e56c] | 763 | |
---|
[56da40e] | 764 | glClearColor(red, green, blue, 1.0); |
---|
[1897247] | 765 | CHECK_GL_ERROR("SetBackgroundColour", "glClearColor"); |
---|
[56da40e] | 766 | } |
---|
| 767 | |
---|
[aa048c3] | 768 | void GLACanvas::SetColour(const GLAPen& pen, double rgb_scale) |
---|
[56da40e] | 769 | { |
---|
| 770 | // Set the colour for subsequent operations. |
---|
[aa048c3] | 771 | glColor3f(pen.GetRed() * rgb_scale, pen.GetGreen() * rgb_scale, |
---|
| 772 | pen.GetBlue() * rgb_scale); |
---|
[56da40e] | 773 | } |
---|
| 774 | |
---|
[aa048c3] | 775 | void GLACanvas::SetColour(const GLAPen& pen) |
---|
[f383708] | 776 | { |
---|
[aa048c3] | 777 | // Set the colour for subsequent operations. |
---|
| 778 | glColor3dv(pen.components); |
---|
[f383708] | 779 | } |
---|
| 780 | |
---|
[aa048c3] | 781 | void GLACanvas::SetColour(gla_colour colour) |
---|
[56da40e] | 782 | { |
---|
[aa048c3] | 783 | // Set the colour for subsequent operations. |
---|
| 784 | glColor3ubv(&COLOURS[colour].r); |
---|
[56da40e] | 785 | } |
---|
| 786 | |
---|
| 787 | void GLACanvas::DrawText(glaCoord x, glaCoord y, glaCoord z, const wxString& str) |
---|
| 788 | { |
---|
| 789 | // Draw a text string on the current buffer in the current font. |
---|
[1eeb55a] | 790 | #ifdef USE_FNT |
---|
| 791 | GLdouble X, Y, Z; |
---|
| 792 | if (!gluProject(x, y, z, modelview_matrix, projection_matrix, viewport, |
---|
| 793 | &X, &Y, &Z)) return; |
---|
[3f8b339] | 794 | // Only draw text which is in front of the viewer. |
---|
[36c3285] | 795 | if (Z > 0) DrawIndicatorText((int)X, (int)Y, str); |
---|
[1eeb55a] | 796 | #else |
---|
[56da40e] | 797 | glRasterPos3d(x, y, z); |
---|
[1897247] | 798 | CHECK_GL_ERROR("DrawText", "glRasterPos3d"); |
---|
[fc4ee5b] | 799 | |
---|
| 800 | #ifdef FREEGLUT |
---|
| 801 | glutBitmapString(m_Font, (const unsigned char *)str.c_str()); |
---|
| 802 | CHECK_GL_ERROR("DrawText", "glutBitmapString"); |
---|
| 803 | #else |
---|
[4252768] | 804 | for (size_t pos = 0; pos < str.length(); pos++) { |
---|
[d4cb449] | 805 | glutBitmapCharacter(m_Font, int((unsigned char)str[pos])); |
---|
[1897247] | 806 | CHECK_GL_ERROR("DrawText", "glutBitmapCharacter"); |
---|
[56da40e] | 807 | } |
---|
[fc4ee5b] | 808 | #endif |
---|
[1eeb55a] | 809 | #endif |
---|
[56da40e] | 810 | } |
---|
| 811 | |
---|
[1eeb55a] | 812 | void GLACanvas::DrawIndicatorText(int x, int y, const wxString& str) |
---|
[56da40e] | 813 | { |
---|
[1eeb55a] | 814 | #ifdef USE_FNT |
---|
[5b13e4c] | 815 | glPushAttrib(GL_ENABLE_BIT); |
---|
[1eeb55a] | 816 | glEnable(GL_ALPHA_TEST); |
---|
[5b13e4c] | 817 | glEnable(GL_TEXTURE_2D); |
---|
| 818 | glDisable(GL_DEPTH_TEST); |
---|
[1eeb55a] | 819 | m_Font.puts(x, y, str.c_str()); |
---|
| 820 | glPopAttrib(); |
---|
| 821 | #else |
---|
[087bc72] | 822 | DrawText(x, y, 0.0, str); |
---|
[1eeb55a] | 823 | #endif |
---|
[56da40e] | 824 | } |
---|
| 825 | |
---|
[1eeb55a] | 826 | void GLACanvas::GetTextExtent(const wxString& str, int * x_ext, int * y_ext) |
---|
[56da40e] | 827 | { |
---|
[1eeb55a] | 828 | #ifdef USE_FNT |
---|
[aa048c3] | 829 | m_Font.getTextExtent(str.c_str(), x_ext, y_ext); |
---|
[1eeb55a] | 830 | #else |
---|
[d92d282] | 831 | if (x_ext) { |
---|
[d4cb449] | 832 | #if 1 |
---|
[d92d282] | 833 | *x_ext = glutBitmapLength(m_Font, (const unsigned char *)str.c_str()); |
---|
| 834 | CHECK_GL_ERROR("GetTextExtent", "glutBitmapLength"); |
---|
[d4cb449] | 835 | #else |
---|
[d92d282] | 836 | *x_ext = 0; |
---|
[4252768] | 837 | for (size_t pos = 0; pos < str.length(); pos++) { |
---|
[d92d282] | 838 | x_ext += glutBitmapWidth(m_Font, int((unsigned char)str[pos])); |
---|
| 839 | CHECK_GL_ERROR("GetTextExtent", "glutBitmapWidth"); |
---|
| 840 | } |
---|
[d4cb449] | 841 | #endif |
---|
[d92d282] | 842 | } |
---|
| 843 | if (y_ext) *y_ext = m_FontSize + 2; |
---|
[1eeb55a] | 844 | #endif |
---|
[56da40e] | 845 | } |
---|
| 846 | |
---|
| 847 | void GLACanvas::BeginQuadrilaterals() |
---|
| 848 | { |
---|
| 849 | // Commence drawing of quadrilaterals. |
---|
[096e56c] | 850 | |
---|
[56da40e] | 851 | glBegin(GL_QUADS); |
---|
| 852 | } |
---|
| 853 | |
---|
| 854 | void GLACanvas::EndQuadrilaterals() |
---|
| 855 | { |
---|
| 856 | // Finish drawing of quadrilaterals. |
---|
[096e56c] | 857 | |
---|
[56da40e] | 858 | glEnd(); |
---|
[9baa53a] | 859 | CHECK_GL_ERROR("EndQuadrilaterals", "glEnd GL_QUADS"); |
---|
[56da40e] | 860 | } |
---|
| 861 | |
---|
| 862 | void GLACanvas::BeginLines() |
---|
| 863 | { |
---|
| 864 | // Commence drawing of a set of lines. |
---|
| 865 | |
---|
| 866 | glBegin(GL_LINES); |
---|
| 867 | } |
---|
| 868 | |
---|
| 869 | void GLACanvas::EndLines() |
---|
| 870 | { |
---|
| 871 | // Finish drawing of a set of lines. |
---|
| 872 | |
---|
| 873 | glEnd(); |
---|
[9baa53a] | 874 | CHECK_GL_ERROR("EndLines", "glEnd GL_LINES"); |
---|
[56da40e] | 875 | } |
---|
| 876 | |
---|
| 877 | void GLACanvas::BeginTriangles() |
---|
| 878 | { |
---|
| 879 | // Commence drawing of a set of triangles. |
---|
| 880 | |
---|
| 881 | glBegin(GL_TRIANGLES); |
---|
| 882 | } |
---|
| 883 | |
---|
| 884 | void GLACanvas::EndTriangles() |
---|
| 885 | { |
---|
| 886 | // Finish drawing of a set of triangles. |
---|
| 887 | |
---|
| 888 | glEnd(); |
---|
[9baa53a] | 889 | CHECK_GL_ERROR("EndTriangles", "glEnd GL_TRIANGLES"); |
---|
[56da40e] | 890 | } |
---|
| 891 | |
---|
[dde4fe7] | 892 | void GLACanvas::BeginTriangleStrip() |
---|
| 893 | { |
---|
| 894 | // Commence drawing of a triangle strip. |
---|
| 895 | |
---|
| 896 | glBegin(GL_TRIANGLE_STRIP); |
---|
| 897 | } |
---|
| 898 | |
---|
| 899 | void GLACanvas::EndTriangleStrip() |
---|
| 900 | { |
---|
| 901 | // Finish drawing of a triangle strip. |
---|
| 902 | |
---|
| 903 | glEnd(); |
---|
[9baa53a] | 904 | CHECK_GL_ERROR("EndTriangleStrip", "glEnd GL_TRIANGLE_STRIP"); |
---|
[dde4fe7] | 905 | } |
---|
| 906 | |
---|
[56da40e] | 907 | void GLACanvas::BeginPolyline() |
---|
| 908 | { |
---|
| 909 | // Commence drawing of a polyline. |
---|
| 910 | |
---|
| 911 | glBegin(GL_LINE_STRIP); |
---|
| 912 | } |
---|
| 913 | |
---|
| 914 | void GLACanvas::EndPolyline() |
---|
| 915 | { |
---|
| 916 | // Finish drawing of a polyline. |
---|
[096e56c] | 917 | |
---|
[56da40e] | 918 | glEnd(); |
---|
[9baa53a] | 919 | CHECK_GL_ERROR("EndPolyline", "glEnd GL_LINE_STRIP"); |
---|
[56da40e] | 920 | } |
---|
| 921 | |
---|
[45aa1d6] | 922 | void GLACanvas::BeginPolygon() |
---|
| 923 | { |
---|
| 924 | // Commence drawing of a polygon. |
---|
| 925 | |
---|
| 926 | glBegin(GL_POLYGON); |
---|
| 927 | } |
---|
| 928 | |
---|
| 929 | void GLACanvas::EndPolygon() |
---|
| 930 | { |
---|
| 931 | // Finish drawing of a polygon. |
---|
[096e56c] | 932 | |
---|
[45aa1d6] | 933 | glEnd(); |
---|
[9baa53a] | 934 | CHECK_GL_ERROR("EndPolygon", "glEnd GL_POLYGON"); |
---|
[45aa1d6] | 935 | } |
---|
| 936 | |
---|
[56da40e] | 937 | void GLACanvas::PlaceVertex(glaCoord x, glaCoord y, glaCoord z) |
---|
| 938 | { |
---|
| 939 | // Place a vertex for the current object being drawn. |
---|
| 940 | |
---|
[edb6576] | 941 | #ifdef GLA_DEBUG |
---|
| 942 | m_Vertices++; |
---|
| 943 | #endif |
---|
[56da40e] | 944 | glVertex3d(x, y, z); |
---|
| 945 | } |
---|
| 946 | |
---|
| 947 | void GLACanvas::PlaceIndicatorVertex(glaCoord x, glaCoord y) |
---|
| 948 | { |
---|
| 949 | // Place a vertex for the current indicator object being drawn. |
---|
| 950 | |
---|
[087bc72] | 951 | PlaceVertex(x, y, 0.0); |
---|
[56da40e] | 952 | } |
---|
| 953 | |
---|
[e633bb1] | 954 | void GLACanvas::BeginBlobs() |
---|
[d9b3270] | 955 | { |
---|
[4ba80e0] | 956 | if (glpoint_ok) { |
---|
| 957 | // Commence drawing of a set of blobs. |
---|
[78924eb] | 958 | glPushAttrib(GL_ENABLE_BIT); |
---|
| 959 | CHECK_GL_ERROR("BeginBlobs", "glPushAttrib"); |
---|
[4ba80e0] | 960 | glEnable(GL_ALPHA_TEST); |
---|
| 961 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_ALPHA_TEST"); |
---|
| 962 | glEnable(GL_POINT_SMOOTH); |
---|
| 963 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_POINT_SMOOTH"); |
---|
| 964 | glBegin(GL_POINTS); |
---|
| 965 | } else { |
---|
[6662d02] | 966 | glPushAttrib(GL_TRANSFORM_BIT|GL_VIEWPORT_BIT|GL_ENABLE_BIT); |
---|
[4ba80e0] | 967 | CHECK_GL_ERROR("BeginBlobs", "glPushAttrib"); |
---|
| 968 | SetIndicatorTransform(); |
---|
[6f5f9e5] | 969 | glEnable(GL_DEPTH_TEST); |
---|
| 970 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_DEPTH_TEST"); |
---|
[4ba80e0] | 971 | } |
---|
[e633bb1] | 972 | } |
---|
[d9b3270] | 973 | |
---|
[e633bb1] | 974 | void GLACanvas::EndBlobs() |
---|
| 975 | { |
---|
[4ba80e0] | 976 | if (glpoint_ok) { |
---|
| 977 | // Finish drawing of a set of blobs. |
---|
| 978 | glEnd(); |
---|
| 979 | CHECK_GL_ERROR("EndBlobs", "GL_POINTS"); |
---|
| 980 | } |
---|
[78924eb] | 981 | glPopAttrib(); |
---|
| 982 | CHECK_GL_ERROR("EndBlobs", "glPopAttrib"); |
---|
[e633bb1] | 983 | } |
---|
[d9b3270] | 984 | |
---|
[e633bb1] | 985 | void GLACanvas::DrawBlob(glaCoord x, glaCoord y, glaCoord z) |
---|
| 986 | { |
---|
[4ba80e0] | 987 | if (glpoint_ok) { |
---|
| 988 | // Draw a marker. |
---|
| 989 | PlaceVertex(x, y, z); |
---|
| 990 | } else { |
---|
| 991 | Double X, Y, Z; |
---|
[d67450e] | 992 | if (!Transform(Vector3(x, y, z), &X, &Y, &Z)) { |
---|
[4ba80e0] | 993 | printf("bad transform\n"); |
---|
| 994 | return; |
---|
| 995 | } |
---|
| 996 | // Stuff behind us (in perspective view) will get clipped, |
---|
| 997 | // but we can save effort with a cheap check here. |
---|
| 998 | if (Z <= 0) return; |
---|
| 999 | |
---|
| 1000 | // Draw an filled circle. |
---|
| 1001 | assert(m_Quadric); |
---|
| 1002 | glTranslated(X, Y, Z); |
---|
[9baa53a] | 1003 | CHECK_GL_ERROR("DrawBlob", "glTranslated 1"); |
---|
[4ba80e0] | 1004 | gluDisk(m_Quadric, 0, BLOB_DIAMETER * 0.5, 8, 1); |
---|
[9baa53a] | 1005 | CHECK_GL_ERROR("DrawBlob", "gluDisk"); |
---|
[4ba80e0] | 1006 | glTranslated(-X, -Y, -Z); |
---|
[9baa53a] | 1007 | CHECK_GL_ERROR("DrawBlob", "glTranslated 2"); |
---|
[78924eb] | 1008 | } |
---|
[95ce35f] | 1009 | #ifdef GLA_DEBUG |
---|
[78924eb] | 1010 | m_Vertices++; |
---|
[95ce35f] | 1011 | #endif |
---|
[429465a] | 1012 | } |
---|
| 1013 | |
---|
[81aea4e] | 1014 | void GLACanvas::DrawBlob(glaCoord x, glaCoord y) |
---|
| 1015 | { |
---|
| 1016 | if (glpoint_ok) { |
---|
| 1017 | // Draw a marker. |
---|
| 1018 | PlaceVertex(x, y, 0); |
---|
| 1019 | } else { |
---|
| 1020 | // Draw an filled circle. |
---|
| 1021 | assert(m_Quadric); |
---|
| 1022 | glTranslated(x, y, 0); |
---|
[9baa53a] | 1023 | CHECK_GL_ERROR("DrawBlob 2", "glTranslated 1"); |
---|
[81aea4e] | 1024 | gluDisk(m_Quadric, 0, BLOB_DIAMETER * 0.5, 8, 1); |
---|
[9baa53a] | 1025 | CHECK_GL_ERROR("DrawBlob 2", "gluDisk"); |
---|
[81aea4e] | 1026 | glTranslated(-x, -y, 0); |
---|
[9baa53a] | 1027 | CHECK_GL_ERROR("DrawBlob 2", "glTranslated 2"); |
---|
[81aea4e] | 1028 | } |
---|
| 1029 | #ifdef GLA_DEBUG |
---|
| 1030 | m_Vertices++; |
---|
| 1031 | #endif |
---|
| 1032 | } |
---|
| 1033 | |
---|
[86fe6e4] | 1034 | void GLACanvas::BeginCrosses() |
---|
| 1035 | { |
---|
[95ce35f] | 1036 | // Plot crosses. |
---|
| 1037 | if (glpoint_sprite) { |
---|
| 1038 | glPushAttrib(GL_ENABLE_BIT|GL_POINT_BIT); |
---|
[9baa53a] | 1039 | CHECK_GL_ERROR("BeginCrosses", "glPushAttrib"); |
---|
[95ce35f] | 1040 | glBindTexture(GL_TEXTURE_2D, m_CrossTexture); |
---|
[9baa53a] | 1041 | CHECK_GL_ERROR("BeginCrosses", "glBindTexture"); |
---|
[95ce35f] | 1042 | glEnable(GL_ALPHA_TEST); |
---|
[9baa53a] | 1043 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_ALPHA_TEST"); |
---|
[95ce35f] | 1044 | glPointSize(8); |
---|
[9baa53a] | 1045 | CHECK_GL_ERROR("BeginCrosses", "glPointSize"); |
---|
| 1046 | glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE); |
---|
| 1047 | CHECK_GL_ERROR("BeginCrosses", "glTexEnvi GL_POINT_SPRITE"); |
---|
[95ce35f] | 1048 | glEnable(GL_TEXTURE_2D); |
---|
[9baa53a] | 1049 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_TEXTURE_2D"); |
---|
| 1050 | glEnable(GL_POINT_SPRITE); |
---|
| 1051 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_POINT_SPRITE"); |
---|
[95ce35f] | 1052 | glBegin(GL_POINTS); |
---|
| 1053 | } else { |
---|
| 1054 | // To get the crosses to appear at a constant size and orientation on |
---|
| 1055 | // screen, we plot them in the Indicator transform coordinates (which |
---|
| 1056 | // unfortunately means they can't be usefully put in an opengl display |
---|
| 1057 | // list). |
---|
[6662d02] | 1058 | glPushAttrib(GL_TRANSFORM_BIT|GL_VIEWPORT_BIT|GL_ENABLE_BIT); |
---|
[9baa53a] | 1059 | CHECK_GL_ERROR("BeginCrosses", "glPushAttrib 2"); |
---|
[95ce35f] | 1060 | SetIndicatorTransform(); |
---|
[6f5f9e5] | 1061 | glEnable(GL_DEPTH_TEST); |
---|
[9baa53a] | 1062 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_DEPTH_TEST"); |
---|
[95ce35f] | 1063 | glBegin(GL_LINES); |
---|
| 1064 | } |
---|
[86fe6e4] | 1065 | } |
---|
| 1066 | |
---|
| 1067 | void GLACanvas::EndCrosses() |
---|
| 1068 | { |
---|
[95ce35f] | 1069 | glEnd(); |
---|
[9baa53a] | 1070 | if (glpoint_sprite) { |
---|
| 1071 | CHECK_GL_ERROR("EndCrosses", "glEnd GL_POINTS"); |
---|
| 1072 | } else { |
---|
| 1073 | CHECK_GL_ERROR("EndCrosses", "glEnd GL_LINES"); |
---|
| 1074 | } |
---|
[86fe6e4] | 1075 | glPopAttrib(); |
---|
| 1076 | CHECK_GL_ERROR("EndCrosses", "glPopAttrib"); |
---|
| 1077 | } |
---|
| 1078 | |
---|
| 1079 | void GLACanvas::DrawCross(glaCoord x, glaCoord y, glaCoord z) |
---|
| 1080 | { |
---|
[95ce35f] | 1081 | if (glpoint_sprite) { |
---|
| 1082 | PlaceVertex(x, y, z); |
---|
| 1083 | } else { |
---|
| 1084 | Double X, Y, Z; |
---|
[d67450e] | 1085 | if (!Transform(Vector3(x, y, z), &X, &Y, &Z)) { |
---|
[95ce35f] | 1086 | printf("bad transform\n"); |
---|
| 1087 | return; |
---|
| 1088 | } |
---|
| 1089 | // Stuff behind us (in perspective view) will get clipped, |
---|
| 1090 | // but we can save effort with a cheap check here. |
---|
| 1091 | if (Z > 0) { |
---|
| 1092 | // Round to integers before adding on the offsets for the |
---|
| 1093 | // cross arms to avoid uneven crosses. |
---|
| 1094 | X = rint(X); |
---|
| 1095 | Y = rint(Y); |
---|
| 1096 | PlaceVertex(X - 3, Y - 3, Z); |
---|
| 1097 | PlaceVertex(X + 3, Y + 3, Z); |
---|
| 1098 | PlaceVertex(X - 3, Y + 3, Z); |
---|
| 1099 | PlaceVertex(X + 3, Y - 3, Z); |
---|
| 1100 | } |
---|
[86fe6e4] | 1101 | } |
---|
[78924eb] | 1102 | #ifdef GLA_DEBUG |
---|
| 1103 | m_Vertices++; |
---|
| 1104 | #endif |
---|
[86fe6e4] | 1105 | } |
---|
| 1106 | |
---|
[e633bb1] | 1107 | void GLACanvas::DrawRing(glaCoord x, glaCoord y) |
---|
[429465a] | 1108 | { |
---|
| 1109 | // Draw an unfilled circle |
---|
[096e56c] | 1110 | const Double radius = 4; |
---|
[429465a] | 1111 | assert(m_Quadric); |
---|
[78924eb] | 1112 | glMatrixMode(GL_MODELVIEW); |
---|
| 1113 | CHECK_GL_ERROR("DrawRing", "glMatrixMode"); |
---|
| 1114 | glPushMatrix(); |
---|
| 1115 | CHECK_GL_ERROR("DrawRing", "glPushMatrix"); |
---|
[429465a] | 1116 | glTranslated(x, y, 0.0); |
---|
| 1117 | CHECK_GL_ERROR("DrawRing", "glTranslated"); |
---|
| 1118 | gluDisk(m_Quadric, radius - 1.0, radius, 12, 1); |
---|
| 1119 | CHECK_GL_ERROR("DrawRing", "gluDisk"); |
---|
[78924eb] | 1120 | glPopMatrix(); |
---|
| 1121 | CHECK_GL_ERROR("DrawRing", "glPopMatrix"); |
---|
[d9b3270] | 1122 | } |
---|
| 1123 | |
---|
[aa048c3] | 1124 | void GLACanvas::DrawRectangle(gla_colour edge, gla_colour fill, |
---|
| 1125 | glaCoord x0, glaCoord y0, glaCoord w, glaCoord h) |
---|
[56da40e] | 1126 | { |
---|
| 1127 | // Draw a filled rectangle with an edge in the indicator plane. |
---|
[ca8c864] | 1128 | // (x0, y0) specify the bottom-left corner of the rectangle and (w, h) the |
---|
| 1129 | // size. |
---|
[56da40e] | 1130 | |
---|
[c10dd28] | 1131 | SetColour(fill); |
---|
[aa048c3] | 1132 | BeginQuadrilaterals(); |
---|
[56da40e] | 1133 | PlaceIndicatorVertex(x0, y0); |
---|
| 1134 | PlaceIndicatorVertex(x0 + w, y0); |
---|
| 1135 | PlaceIndicatorVertex(x0 + w, y0 + h); |
---|
| 1136 | PlaceIndicatorVertex(x0, y0 + h); |
---|
| 1137 | EndQuadrilaterals(); |
---|
| 1138 | |
---|
[aa048c3] | 1139 | if (edge != fill) { |
---|
[c10dd28] | 1140 | SetColour(edge); |
---|
| 1141 | BeginLines(); |
---|
| 1142 | PlaceIndicatorVertex(x0, y0); |
---|
| 1143 | PlaceIndicatorVertex(x0 + w, y0); |
---|
| 1144 | PlaceIndicatorVertex(x0 + w, y0 + h); |
---|
| 1145 | PlaceIndicatorVertex(x0, y0 + h); |
---|
| 1146 | EndLines(); |
---|
| 1147 | } |
---|
[56da40e] | 1148 | } |
---|
| 1149 | |
---|
[aa048c3] | 1150 | void |
---|
| 1151 | GLACanvas::DrawShadedRectangle(const GLAPen & fill_bot, const GLAPen & fill_top, |
---|
| 1152 | glaCoord x0, glaCoord y0, |
---|
| 1153 | glaCoord w, glaCoord h) |
---|
| 1154 | { |
---|
| 1155 | // Draw a graduated filled rectangle in the indicator plane. |
---|
| 1156 | // (x0, y0) specify the bottom-left corner of the rectangle and (w, h) the |
---|
| 1157 | // size. |
---|
| 1158 | |
---|
[02aa4d4] | 1159 | glShadeModel(GL_SMOOTH); |
---|
[9baa53a] | 1160 | CHECK_GL_ERROR("DrawShadedRectangle", "glShadeModel GL_SMOOTH"); |
---|
[aa048c3] | 1161 | BeginQuadrilaterals(); |
---|
| 1162 | SetColour(fill_bot); |
---|
| 1163 | PlaceIndicatorVertex(x0, y0); |
---|
| 1164 | PlaceIndicatorVertex(x0 + w, y0); |
---|
| 1165 | SetColour(fill_top); |
---|
| 1166 | PlaceIndicatorVertex(x0 + w, y0 + h); |
---|
| 1167 | PlaceIndicatorVertex(x0, y0 + h); |
---|
| 1168 | EndQuadrilaterals(); |
---|
[02aa4d4] | 1169 | glShadeModel(GL_FLAT); |
---|
[9baa53a] | 1170 | CHECK_GL_ERROR("DrawShadedRectangle", "glShadeModel GL_FLAT"); |
---|
[aa048c3] | 1171 | } |
---|
| 1172 | |
---|
| 1173 | void GLACanvas::DrawCircle(gla_colour edge, gla_colour fill, |
---|
| 1174 | glaCoord cx, glaCoord cy, glaCoord radius) |
---|
[56da40e] | 1175 | { |
---|
[087bc72] | 1176 | // Draw a filled circle with an edge. |
---|
[56da40e] | 1177 | SetColour(fill); |
---|
[78924eb] | 1178 | glMatrixMode(GL_MODELVIEW); |
---|
| 1179 | CHECK_GL_ERROR("DrawCircle", "glMatrixMode"); |
---|
| 1180 | glPushMatrix(); |
---|
| 1181 | CHECK_GL_ERROR("DrawCircle", "glPushMatrix"); |
---|
[56da40e] | 1182 | glTranslated(cx, cy, 0.0); |
---|
[8326157] | 1183 | CHECK_GL_ERROR("DrawCircle", "glTranslated"); |
---|
[1b12b82] | 1184 | assert(m_Quadric); |
---|
| 1185 | gluDisk(m_Quadric, 0.0, radius, 36, 1); |
---|
[8326157] | 1186 | CHECK_GL_ERROR("DrawCircle", "gluDisk"); |
---|
[56da40e] | 1187 | SetColour(edge); |
---|
[1b12b82] | 1188 | gluDisk(m_Quadric, radius - 1.0, radius, 36, 1); |
---|
[8326157] | 1189 | CHECK_GL_ERROR("DrawCircle", "gluDisk (2)"); |
---|
[78924eb] | 1190 | glPopMatrix(); |
---|
| 1191 | CHECK_GL_ERROR("DrawCircle", "glPopMatrix"); |
---|
[56da40e] | 1192 | } |
---|
| 1193 | |
---|
[aa048c3] | 1194 | void GLACanvas::DrawSemicircle(gla_colour edge, gla_colour fill, |
---|
[1b12b82] | 1195 | glaCoord cx, glaCoord cy, |
---|
| 1196 | glaCoord radius, glaCoord start) |
---|
[56da40e] | 1197 | { |
---|
| 1198 | // Draw a filled semicircle with an edge. |
---|
[ca8c864] | 1199 | // The semicircle extends from "start" deg to "start"+180 deg (increasing |
---|
| 1200 | // clockwise, 0 deg upwards). |
---|
[56da40e] | 1201 | SetColour(fill); |
---|
[78924eb] | 1202 | glMatrixMode(GL_MODELVIEW); |
---|
| 1203 | CHECK_GL_ERROR("DrawSemicircle", "glMatrixMode"); |
---|
| 1204 | glPushMatrix(); |
---|
| 1205 | CHECK_GL_ERROR("DrawSemicircle", "glPushMatrix"); |
---|
[56da40e] | 1206 | glTranslated(cx, cy, 0.0); |
---|
[78924eb] | 1207 | CHECK_GL_ERROR("DrawSemicircle", "glTranslated"); |
---|
[1b12b82] | 1208 | assert(m_Quadric); |
---|
| 1209 | gluPartialDisk(m_Quadric, 0.0, radius, 36, 1, start, 180.0); |
---|
[78924eb] | 1210 | CHECK_GL_ERROR("DrawSemicircle", "gluPartialDisk"); |
---|
[56da40e] | 1211 | SetColour(edge); |
---|
[1b12b82] | 1212 | gluPartialDisk(m_Quadric, radius - 1.0, radius, 36, 1, start, 180.0); |
---|
[78924eb] | 1213 | CHECK_GL_ERROR("DrawSemicircle", "gluPartialDisk (2)"); |
---|
| 1214 | glPopMatrix(); |
---|
| 1215 | CHECK_GL_ERROR("DrawSemicircle", "glPopMatrix"); |
---|
[56da40e] | 1216 | } |
---|
| 1217 | |
---|
[d67450e] | 1218 | void |
---|
| 1219 | GLACanvas::DrawTriangle(gla_colour edge, gla_colour fill, |
---|
| 1220 | const Vector3 &p0, const Vector3 &p1, const Vector3 &p2) |
---|
[56da40e] | 1221 | { |
---|
[ca8c864] | 1222 | // Draw a filled triangle with an edge. |
---|
[096e56c] | 1223 | |
---|
[56da40e] | 1224 | SetColour(fill); |
---|
| 1225 | BeginTriangles(); |
---|
[d67450e] | 1226 | PlaceIndicatorVertex(p0.GetX(), p0.GetY()); |
---|
| 1227 | PlaceIndicatorVertex(p1.GetX(), p1.GetY()); |
---|
| 1228 | PlaceIndicatorVertex(p2.GetX(), p2.GetY()); |
---|
[56da40e] | 1229 | EndTriangles(); |
---|
| 1230 | |
---|
| 1231 | SetColour(edge); |
---|
[d67450e] | 1232 | glBegin(GL_LINE_STRIP); |
---|
| 1233 | PlaceIndicatorVertex(p0.GetX(), p0.GetY()); |
---|
| 1234 | PlaceIndicatorVertex(p1.GetX(), p1.GetY()); |
---|
| 1235 | PlaceIndicatorVertex(p2.GetX(), p2.GetY()); |
---|
| 1236 | glEnd(); |
---|
[9baa53a] | 1237 | CHECK_GL_ERROR("DrawTriangle", "glEnd GL_LINE_STRIP"); |
---|
[56da40e] | 1238 | } |
---|
| 1239 | |
---|
| 1240 | void GLACanvas::EnableDashedLines() |
---|
| 1241 | { |
---|
| 1242 | // Enable dashed lines, and start drawing in them. |
---|
| 1243 | |
---|
[9eb58d0] | 1244 | glLineStipple(1, 0x3333); |
---|
[8326157] | 1245 | CHECK_GL_ERROR("EnableDashedLines", "glLineStipple"); |
---|
[56da40e] | 1246 | glEnable(GL_LINE_STIPPLE); |
---|
[bb1f293] | 1247 | CHECK_GL_ERROR("EnableDashedLines", "glEnable GL_LINE_STIPPLE"); |
---|
[56da40e] | 1248 | } |
---|
| 1249 | |
---|
| 1250 | void GLACanvas::DisableDashedLines() |
---|
| 1251 | { |
---|
| 1252 | glDisable(GL_LINE_STIPPLE); |
---|
[bb1f293] | 1253 | CHECK_GL_ERROR("DisableDashedLines", "glDisable GL_LINE_STIPPLE"); |
---|
[56da40e] | 1254 | } |
---|
| 1255 | |
---|
[d67450e] | 1256 | bool GLACanvas::Transform(const Vector3 & v, |
---|
[3c3ca1d] | 1257 | Double* x_out, Double* y_out, Double* z_out) const |
---|
[56da40e] | 1258 | { |
---|
| 1259 | // Convert from data coordinates to screen coordinates. |
---|
[096e56c] | 1260 | |
---|
[087bc72] | 1261 | // Perform the projection. |
---|
[d67450e] | 1262 | return gluProject(v.GetX(), v.GetY(), v.GetZ(), |
---|
| 1263 | modelview_matrix, projection_matrix, viewport, |
---|
[6adffadf] | 1264 | x_out, y_out, z_out); |
---|
[56da40e] | 1265 | } |
---|
| 1266 | |
---|
[1b12b82] | 1267 | void GLACanvas::ReverseTransform(Double x, Double y, |
---|
[3c3ca1d] | 1268 | Double* x_out, Double* y_out, Double* z_out) const |
---|
[a2b3d62] | 1269 | { |
---|
| 1270 | // Convert from screen coordinates to data coordinates. |
---|
[096e56c] | 1271 | |
---|
[a2b3d62] | 1272 | // Perform the projection. |
---|
[1b12b82] | 1273 | gluUnProject(x, y, 0.0, modelview_matrix, projection_matrix, viewport, |
---|
| 1274 | x_out, y_out, z_out); |
---|
[8326157] | 1275 | CHECK_GL_ERROR("ReverseTransform", "gluUnProject"); |
---|
[a2b3d62] | 1276 | } |
---|
| 1277 | |
---|
[e7f9e99] | 1278 | Double GLACanvas::SurveyUnitsAcrossViewport() const |
---|
[087bc72] | 1279 | { |
---|
[8326157] | 1280 | // Measure the current viewport in survey units, taking into account the |
---|
| 1281 | // current display scale. |
---|
[087bc72] | 1282 | |
---|
[9eb58d0] | 1283 | assert(m_Scale != 0.0); |
---|
[db59b02] | 1284 | list_flags |= INVALIDATE_ON_SCALE; |
---|
[c5fc8eb] | 1285 | return m_VolumeDiameter / m_Scale; |
---|
[087bc72] | 1286 | } |
---|
[045e2af] | 1287 | |
---|
[d67450e] | 1288 | void GLACanvas::ToggleSmoothShading() |
---|
| 1289 | { |
---|
| 1290 | m_SmoothShading = !m_SmoothShading; |
---|
| 1291 | } |
---|
| 1292 | |
---|
[a517825] | 1293 | void GLACanvas::ToggleTextured() |
---|
| 1294 | { |
---|
| 1295 | m_Textured = !m_Textured; |
---|
| 1296 | if (m_Textured && m_Texture == 0) { |
---|
| 1297 | glGenTextures(1, &m_Texture); |
---|
| 1298 | CHECK_GL_ERROR("ToggleTextured", "glGenTextures"); |
---|
| 1299 | |
---|
| 1300 | glBindTexture(GL_TEXTURE_2D, m_Texture); |
---|
| 1301 | CHECK_GL_ERROR("ToggleTextured", "glBindTexture"); |
---|
| 1302 | |
---|
| 1303 | ::wxInitAllImageHandlers(); |
---|
[5627cbb] | 1304 | |
---|
[a517825] | 1305 | wxImage img; |
---|
[8a05a7a] | 1306 | wxString texture(wmsg_cfgpth()); |
---|
[5627cbb] | 1307 | texture += wxCONFIG_PATH_SEPARATOR; |
---|
| 1308 | texture += wxT("icons"); |
---|
| 1309 | texture += wxCONFIG_PATH_SEPARATOR; |
---|
| 1310 | texture += wxT("texture.png"); |
---|
| 1311 | if (!img.LoadFile(texture, wxBITMAP_TYPE_PNG)) { |
---|
[a517825] | 1312 | // FIXME |
---|
| 1313 | fprintf(stderr, "Couldn't load image.\n"); |
---|
| 1314 | exit(1); |
---|
| 1315 | } |
---|
[5627cbb] | 1316 | |
---|
[ecbdd96] | 1317 | // Generate mipmaps. |
---|
[7c18431] | 1318 | gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGB, // was GL_LUMINANCE |
---|
[ecbdd96] | 1319 | img.GetWidth(), img.GetHeight(), |
---|
| 1320 | GL_RGB, GL_UNSIGNED_BYTE, img.GetData()); |
---|
| 1321 | CHECK_GL_ERROR("ToggleTextured", "gluBuild2DMipmaps"); |
---|
[a517825] | 1322 | |
---|
| 1323 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
---|
| 1324 | CHECK_GL_ERROR("ToggleTextured", "glTexEnvi"); |
---|
| 1325 | } |
---|
| 1326 | } |
---|
| 1327 | |
---|
[045e2af] | 1328 | bool GLACanvas::SaveScreenshot(const wxString & fnm, int type) const |
---|
| 1329 | { |
---|
| 1330 | int width; |
---|
| 1331 | int height; |
---|
| 1332 | GetSize(&width, &height); |
---|
[1bd4841] | 1333 | unsigned char *pixels = (unsigned char *)malloc(3 * width * (height + 1)); |
---|
[045e2af] | 1334 | if (!pixels) return false; |
---|
| 1335 | glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *)pixels); |
---|
[1bd4841] | 1336 | unsigned char * tmp_row = pixels + 3 * width * height; |
---|
| 1337 | // We need to flip the image vertically - this approach should be more |
---|
| 1338 | // efficient than using wxImage::Mirror(false) as that creates a new |
---|
| 1339 | // wxImage object. |
---|
| 1340 | for (int y = height / 2 - 1; y >= 0; --y) { |
---|
| 1341 | unsigned char * upper = pixels + 3 * width * y; |
---|
| 1342 | unsigned char * lower = pixels + 3 * width * (height - y - 1); |
---|
| 1343 | memcpy(tmp_row, upper, 3 * width); |
---|
| 1344 | memcpy(upper, lower, 3 * width); |
---|
| 1345 | memcpy(lower, tmp_row, 3 * width); |
---|
| 1346 | } |
---|
| 1347 | // NB wxImage constructor calls free(pixels) for us. |
---|
[045e2af] | 1348 | wxImage grab(width, height, pixels); |
---|
[1bd4841] | 1349 | return grab.SaveFile(fnm, type); |
---|
[045e2af] | 1350 | } |
---|