[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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[5627cbb] | 304 | wxString path(msg_cfgpth(), wxConvUTF8); |
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[bd551c0] | 305 | path += wxCONFIG_PATH_SEPARATOR; |
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[5627cbb] | 306 | path += wxT("aven.txf"); |
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| 307 | m_Font.load(path.fn_str()); |
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[1eeb55a] | 308 | #endif |
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[4ba80e0] | 309 | |
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| 310 | // Check if we can use GL_POINTS to plot blobs at stations. |
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| 311 | GLdouble point_size_range[2]; |
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| 312 | glGetDoublev(GL_POINT_SIZE_RANGE, point_size_range); |
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| 313 | CHECK_GL_ERROR("FirstShow", "glGetDoublev GL_POINT_SIZE_RANGE"); |
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| 314 | glpoint_ok = (point_size_range[0] <= BLOB_DIAMETER && |
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| 315 | point_size_range[1] >= BLOB_DIAMETER); |
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| 316 | if (glpoint_ok) { |
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| 317 | glPointSize(BLOB_DIAMETER); |
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| 318 | CHECK_GL_ERROR("FirstShow", "glPointSize"); |
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| 319 | } |
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[95ce35f] | 320 | |
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[185d793] | 321 | // Point sprites provide an easy, fast way for us to draw crosses by |
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| 322 | // texture mapping GL points. |
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| 323 | // |
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[81aea4e] | 324 | // If we have OpenGL >= 2.0 then we definitely have GL_POINT_SPRITE. |
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[185d793] | 325 | // Otherwise see if we have the GL_ARB_point_sprite or GL_NV_point_sprite |
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| 326 | // extensions. |
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| 327 | // |
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| 328 | // The symbolic constants GL_POINT_SPRITE, GL_POINT_SPRITE_ARB, and |
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| 329 | // GL_POINT_SPRITE_NV all give the same number so it doesn't matter |
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| 330 | // which we use. |
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| 331 | float maxSize = 0.0f; |
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| 332 | glGetFloatv(GL_POINT_SIZE_MAX, &maxSize); |
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| 333 | if (maxSize >= 8) { |
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| 334 | glpoint_sprite = (atoi((const char *)glGetString(GL_VERSION)) >= 2); |
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| 335 | if (!glpoint_sprite) { |
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| 336 | const char * p = (const char *)glGetString(GL_EXTENSIONS); |
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| 337 | while (true) { |
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[ff8de60] | 338 | size_t l = 0; |
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[185d793] | 339 | if (memcmp(p, "GL_ARB_point_sprite", 19) == 0) { |
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[ff8de60] | 340 | l = 19; |
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[185d793] | 341 | } else if (memcmp(p, "GL_NV_point_sprite", 18) == 0) { |
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[ff8de60] | 342 | l = 18; |
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[185d793] | 343 | } |
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[ff8de60] | 344 | if (l) { |
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| 345 | p += l; |
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| 346 | if (*p == '\0' || *p == ' ') { |
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| 347 | glpoint_sprite = true; |
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| 348 | break; |
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| 349 | } |
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[185d793] | 350 | } |
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| 351 | p = strchr(p + 1, ' '); |
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| 352 | if (!p) break; |
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| 353 | ++p; |
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| 354 | } |
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| 355 | } |
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[95ce35f] | 356 | } |
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[185d793] | 357 | |
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[95ce35f] | 358 | if (glpoint_sprite) { |
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| 359 | glGenTextures(1, &m_CrossTexture); |
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[9baa53a] | 360 | CHECK_GL_ERROR("FirstShow", "glGenTextures"); |
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[95ce35f] | 361 | glBindTexture(GL_TEXTURE_2D, m_CrossTexture); |
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[9baa53a] | 362 | CHECK_GL_ERROR("FirstShow", "glBindTexture"); |
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[95ce35f] | 363 | const unsigned char crossteximage[128] = { |
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| 364 | 255,255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,255,255, |
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| 365 | 0, 0,255,255, 0, 0, 0, 0, 0, 0, 0, 0,255,255, 0, 0, |
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| 366 | 0, 0, 0, 0,255,255, 0, 0, 0, 0,255,255, 0, 0, 0, 0, |
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| 367 | 0, 0, 0, 0, 0, 0,255,255,255,255, 0, 0, 0, 0, 0, 0, |
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| 368 | 0, 0, 0, 0, 0, 0,255,255,255,255, 0, 0, 0, 0, 0, 0, |
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| 369 | 0, 0, 0, 0,255,255, 0, 0, 0, 0,255,255, 0, 0, 0, 0, |
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| 370 | 0, 0,255,255, 0, 0, 0, 0, 0, 0, 0, 0,255,255, 0, 0, |
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| 371 | 255,255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,255,255 |
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| 372 | }; |
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| 373 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
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[9baa53a] | 374 | CHECK_GL_ERROR("FirstShow", "glPixelStorei"); |
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[95ce35f] | 375 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
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[9baa53a] | 376 | CHECK_GL_ERROR("FirstShow", "glTexEnvi"); |
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[95ce35f] | 377 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); |
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[9baa53a] | 378 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_WRAP_S"); |
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[95ce35f] | 379 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); |
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[9baa53a] | 380 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_WRAP_T"); |
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[95ce35f] | 381 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, 8, 8, 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, (GLvoid *)crossteximage); |
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[9baa53a] | 382 | CHECK_GL_ERROR("FirstShow", "glTexImage2D"); |
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[95ce35f] | 383 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
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[9baa53a] | 384 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
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[95ce35f] | 385 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
---|
[9baa53a] | 386 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
[95ce35f] | 387 | } |
---|
[185d793] | 388 | //if (glpoint_ok) printf("Using GL_POINTS for blobs\n"); |
---|
| 389 | //if (glpoint_sprite) printf("Using GL_POINT_SPRITE* for crosses"); |
---|
[ca8c864] | 390 | } |
---|
| 391 | |
---|
[56da40e] | 392 | void GLACanvas::Clear() |
---|
| 393 | { |
---|
| 394 | // Clear the canvas. |
---|
[d727368] | 395 | |
---|
[56da40e] | 396 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
---|
[1897247] | 397 | CHECK_GL_ERROR("Clear", "glClear"); |
---|
[56da40e] | 398 | } |
---|
| 399 | |
---|
| 400 | void GLACanvas::SetScale(Double scale) |
---|
| 401 | { |
---|
[db59b02] | 402 | if (scale != m_Scale) { |
---|
| 403 | vector<GLAList>::iterator i; |
---|
| 404 | for (i = drawing_lists.begin(); i != drawing_lists.end(); ++i) { |
---|
| 405 | if (*i && i->test_flag(INVALIDATE_ON_SCALE)) i->InvalidateList(); |
---|
| 406 | } |
---|
| 407 | |
---|
| 408 | m_Scale = scale; |
---|
| 409 | } |
---|
[56da40e] | 410 | } |
---|
| 411 | |
---|
| 412 | void GLACanvas::AddTranslationScreenCoordinates(int dx, int dy) |
---|
| 413 | { |
---|
| 414 | // Translate the data by a given amount, specified in screen coordinates. |
---|
[096e56c] | 415 | |
---|
[56da40e] | 416 | // Find out how far the translation takes us in data coordinates. |
---|
| 417 | SetDataTransform(); |
---|
| 418 | |
---|
| 419 | Double x0, y0, z0; |
---|
| 420 | Double x, y, z; |
---|
[1b12b82] | 421 | gluUnProject(0.0, 0.0, 0.0, modelview_matrix, projection_matrix, viewport, |
---|
| 422 | &x0, &y0, &z0); |
---|
[bb1f293] | 423 | CHECK_GL_ERROR("AddTranslationScreenCoordinates", "gluUnProject"); |
---|
[1b12b82] | 424 | gluUnProject(dx, -dy, 0.0, modelview_matrix, projection_matrix, viewport, |
---|
| 425 | &x, &y, &z); |
---|
[bb1f293] | 426 | CHECK_GL_ERROR("AddTranslationScreenCoordinates", "gluUnProject (2)"); |
---|
[56da40e] | 427 | |
---|
| 428 | // Apply the translation. |
---|
[d67450e] | 429 | AddTranslation(Vector3(x - x0, y - y0, z - z0)); |
---|
[56da40e] | 430 | } |
---|
| 431 | |
---|
[c5fc8eb] | 432 | void GLACanvas::SetVolumeDiameter(glaCoord diameter) |
---|
[56da40e] | 433 | { |
---|
[c5fc8eb] | 434 | // Set the size of the data drawing volume by giving the diameter of the |
---|
| 435 | // smallest sphere containing it. |
---|
[56da40e] | 436 | |
---|
[5eab797] | 437 | m_VolumeDiameter = max(1.0, diameter); |
---|
[56da40e] | 438 | } |
---|
| 439 | |
---|
| 440 | void GLACanvas::StartDrawing() |
---|
| 441 | { |
---|
| 442 | // Prepare for a redraw operation. |
---|
[096e56c] | 443 | |
---|
[203d2a7] | 444 | SetCurrent(); |
---|
| 445 | glDepthMask(true); |
---|
[56da40e] | 446 | } |
---|
| 447 | |
---|
[d67450e] | 448 | void GLACanvas::EnableSmoothPolygons(bool filled) |
---|
[1b12b82] | 449 | { |
---|
| 450 | // Prepare for drawing smoothly-shaded polygons. |
---|
| 451 | // Only use this when required (in particular lines in lists may not be |
---|
| 452 | // coloured correctly when this is enabled). |
---|
[096e56c] | 453 | |
---|
[d67450e] | 454 | glPushAttrib(GL_ENABLE_BIT|GL_LIGHTING_BIT|GL_POLYGON_BIT); |
---|
| 455 | if (filled) { |
---|
| 456 | glShadeModel(GL_SMOOTH); |
---|
| 457 | glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
---|
| 458 | } else { |
---|
| 459 | glDisable(GL_LINE_SMOOTH); |
---|
| 460 | glDisable(GL_TEXTURE_2D); |
---|
| 461 | glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); |
---|
| 462 | } |
---|
| 463 | CHECK_GL_ERROR("EnableSmoothPolygons", "glPolygonMode"); |
---|
| 464 | |
---|
| 465 | if (filled && m_SmoothShading) { |
---|
| 466 | static const GLfloat mat_specular[] = { 0.2, 0.2, 0.2, 1.0 }; |
---|
| 467 | static const GLfloat light_position[] = { -1.0, -1.0, -1.0, 0.0 }; |
---|
| 468 | static const GLfloat light_ambient[] = { 0.3, 0.3, 0.3, 1.0 }; |
---|
| 469 | static const GLfloat light_diffuse[] = { 0.7, 0.7, 0.7, 1.0 }; |
---|
| 470 | glEnable(GL_COLOR_MATERIAL); |
---|
| 471 | glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, mat_specular); |
---|
| 472 | glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 10.0); |
---|
| 473 | glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient); |
---|
| 474 | glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse); |
---|
| 475 | glLightfv(GL_LIGHT0, GL_POSITION, light_position); |
---|
| 476 | glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE); |
---|
| 477 | glEnable(GL_LIGHTING); |
---|
| 478 | glEnable(GL_LIGHT0); |
---|
| 479 | } |
---|
[1b12b82] | 480 | } |
---|
| 481 | |
---|
| 482 | void GLACanvas::DisableSmoothPolygons() |
---|
| 483 | { |
---|
[d67450e] | 484 | glPopAttrib(); |
---|
[203d2a7] | 485 | } |
---|
| 486 | |
---|
[d67450e] | 487 | void GLACanvas::PlaceNormal(const Vector3 &v) |
---|
[203d2a7] | 488 | { |
---|
| 489 | // Add a normal (for polygons etc.) |
---|
| 490 | |
---|
[d67450e] | 491 | glNormal3d(v.GetX(), v.GetY(), v.GetZ()); |
---|
[1b12b82] | 492 | } |
---|
| 493 | |
---|
[56da40e] | 494 | void GLACanvas::SetDataTransform() |
---|
| 495 | { |
---|
[de24f93] | 496 | // Set viewport. The width and height go to zero when the panel is dragged |
---|
| 497 | // right across so we clamp them to be at least 1 to avoid errors from the |
---|
| 498 | // opengl calls below. |
---|
| 499 | int window_width; |
---|
| 500 | int window_height; |
---|
| 501 | GetSize(&window_width, &window_height); |
---|
| 502 | if (window_height < 1) window_height = 1; |
---|
| 503 | if (window_width < 1) window_width = 1; |
---|
| 504 | double aspect = double(window_height) / double(window_width); |
---|
| 505 | |
---|
| 506 | glViewport(0, 0, window_width, window_height); |
---|
| 507 | CHECK_GL_ERROR("SetDataTransform", "glViewport"); |
---|
| 508 | |
---|
| 509 | // Set projection. |
---|
| 510 | glMatrixMode(GL_PROJECTION); |
---|
| 511 | CHECK_GL_ERROR("SetDataTransform", "glMatrixMode"); |
---|
| 512 | glLoadIdentity(); |
---|
| 513 | CHECK_GL_ERROR("SetDataTransform", "glLoadIdentity"); |
---|
| 514 | |
---|
[d877aa2] | 515 | Double near_plane = 1.0; |
---|
[de24f93] | 516 | if (m_Perspective) { |
---|
[e577f89] | 517 | Double lr = near_plane * tan(rad(25.0)); |
---|
[d877aa2] | 518 | Double far_plane = m_VolumeDiameter * 5 + near_plane; // FIXME: work out properly |
---|
| 519 | Double tb = lr * aspect; |
---|
[de24f93] | 520 | glFrustum(-lr, lr, -tb, tb, near_plane, far_plane); |
---|
| 521 | CHECK_GL_ERROR("SetViewportAndProjection", "glFrustum"); |
---|
| 522 | } else { |
---|
[5092ee7] | 523 | near_plane = 0.0; |
---|
[d877aa2] | 524 | assert(m_Scale != 0.0); |
---|
| 525 | Double lr = m_VolumeDiameter / m_Scale * 0.5; |
---|
| 526 | Double far_plane = m_VolumeDiameter + near_plane; |
---|
| 527 | Double tb = lr * aspect; |
---|
[de24f93] | 528 | glOrtho(-lr, lr, -tb, tb, near_plane, far_plane); |
---|
| 529 | CHECK_GL_ERROR("SetViewportAndProjection", "glOrtho"); |
---|
| 530 | } |
---|
| 531 | |
---|
[56da40e] | 532 | // Set the modelview transform for drawing data. |
---|
| 533 | glMatrixMode(GL_MODELVIEW); |
---|
[1897247] | 534 | CHECK_GL_ERROR("SetDataTransform", "glMatrixMode"); |
---|
[56da40e] | 535 | glLoadIdentity(); |
---|
[1897247] | 536 | CHECK_GL_ERROR("SetDataTransform", "glLoadIdentity"); |
---|
[d877aa2] | 537 | if (m_Perspective) { |
---|
| 538 | glTranslated(0.0, 0.0, -near_plane); |
---|
| 539 | } else { |
---|
| 540 | glTranslated(0.0, 0.0, -0.5 * m_VolumeDiameter); |
---|
| 541 | } |
---|
[1bbd9a8] | 542 | CHECK_GL_ERROR("SetDataTransform", "glTranslated"); |
---|
[2491b8c] | 543 | // Get axes the correct way around (z upwards, y into screen) |
---|
| 544 | glRotated(-90.0, 1.0, 0.0, 0.0); |
---|
| 545 | CHECK_GL_ERROR("SetDataTransform", "glRotated"); |
---|
[08253d9] | 546 | glRotated(m_Tilt, 1.0, 0.0, 0.0); |
---|
| 547 | CHECK_GL_ERROR("SetDataTransform", "glRotated"); |
---|
| 548 | glRotated(m_Pan, 0.0, 0.0, 1.0); |
---|
[2491b8c] | 549 | CHECK_GL_ERROR("SetDataTransform", "CopyToOpenGL"); |
---|
[5092ee7] | 550 | if (m_Perspective) { |
---|
[d67450e] | 551 | glTranslated(m_Translation.GetX(), |
---|
| 552 | m_Translation.GetY(), |
---|
| 553 | m_Translation.GetZ()); |
---|
[5092ee7] | 554 | CHECK_GL_ERROR("SetDataTransform", "glTranslated"); |
---|
| 555 | } |
---|
[dde4fe7] | 556 | |
---|
[de24f93] | 557 | // Save projection matrix. |
---|
| 558 | glGetDoublev(GL_PROJECTION_MATRIX, projection_matrix); |
---|
| 559 | CHECK_GL_ERROR("SetDataTransform", "glGetDoublev"); |
---|
| 560 | |
---|
| 561 | // Save viewport coordinates. |
---|
| 562 | glGetIntegerv(GL_VIEWPORT, viewport); |
---|
| 563 | CHECK_GL_ERROR("SetDataTransform", "glGetIntegerv"); |
---|
| 564 | |
---|
| 565 | // Save modelview matrix. |
---|
[dde4fe7] | 566 | glGetDoublev(GL_MODELVIEW_MATRIX, modelview_matrix); |
---|
| 567 | CHECK_GL_ERROR("SetDataTransform", "glGetDoublev"); |
---|
[de24f93] | 568 | |
---|
[5092ee7] | 569 | if (!m_Perspective) { |
---|
| 570 | // Adjust the translation so we don't change the Z position of the model |
---|
| 571 | Double X, Y, Z; |
---|
[d67450e] | 572 | gluProject(m_Translation.GetX(), |
---|
| 573 | m_Translation.GetY(), |
---|
| 574 | m_Translation.GetZ(), |
---|
[5092ee7] | 575 | modelview_matrix, projection_matrix, viewport, |
---|
| 576 | &X, &Y, &Z); |
---|
| 577 | Double Tx, Ty, Tz; |
---|
| 578 | gluUnProject(X, Y, 0.5, modelview_matrix, projection_matrix, viewport, |
---|
| 579 | &Tx, &Ty, &Tz); |
---|
| 580 | glTranslated(Tx, Ty, Tz); |
---|
| 581 | CHECK_GL_ERROR("SetDataTransform", "glTranslated"); |
---|
| 582 | glGetDoublev(GL_MODELVIEW_MATRIX, modelview_matrix); |
---|
| 583 | } |
---|
[096e56c] | 584 | |
---|
[de24f93] | 585 | glEnable(GL_DEPTH_TEST); |
---|
| 586 | CHECK_GL_ERROR("SetDataTransform", "glEnable GL_DEPTH_TEST"); |
---|
[c60062d] | 587 | |
---|
[a517825] | 588 | if (m_Textured) { |
---|
| 589 | glBindTexture(GL_TEXTURE_2D, m_Texture); |
---|
| 590 | glEnable(GL_TEXTURE_2D); |
---|
| 591 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); |
---|
| 592 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_WRAP_S"); |
---|
| 593 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); |
---|
| 594 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_WRAP_T"); |
---|
| 595 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
---|
| 596 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
---|
[ecbdd96] | 597 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, |
---|
| 598 | GL_LINEAR_MIPMAP_LINEAR); |
---|
[a517825] | 599 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
| 600 | glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); |
---|
| 601 | } else { |
---|
| 602 | glDisable(GL_TEXTURE_2D); |
---|
| 603 | } |
---|
[c60062d] | 604 | if (m_Fog) { |
---|
| 605 | glFogf(GL_FOG_START, near_plane); |
---|
| 606 | glFogf(GL_FOG_END, near_plane + m_VolumeDiameter); |
---|
| 607 | glEnable(GL_FOG); |
---|
[db452ae] | 608 | } else { |
---|
| 609 | glDisable(GL_FOG); |
---|
| 610 | } |
---|
| 611 | |
---|
| 612 | if (m_AntiAlias) { |
---|
| 613 | glEnable(GL_LINE_SMOOTH); |
---|
[e4d40792] | 614 | glEnable(GL_BLEND); |
---|
| 615 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
---|
[db452ae] | 616 | } else { |
---|
| 617 | glDisable(GL_LINE_SMOOTH); |
---|
[c60062d] | 618 | } |
---|
[56da40e] | 619 | } |
---|
| 620 | |
---|
| 621 | void GLACanvas::SetIndicatorTransform() |
---|
| 622 | { |
---|
[db59b02] | 623 | list_flags |= NEVER_CACHE; |
---|
| 624 | |
---|
[bb1f293] | 625 | // Set the modelview transform and projection for drawing indicators. |
---|
[56da40e] | 626 | wxSize size = GetSize(); |
---|
[bb1f293] | 627 | int window_width = max(size.GetWidth(), 1); |
---|
| 628 | int window_height = max(size.GetHeight(), 1); |
---|
[56da40e] | 629 | |
---|
[bb1f293] | 630 | glDisable(GL_DEPTH_TEST); |
---|
| 631 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_DEPTH_TEST"); |
---|
[c60062d] | 632 | glDisable(GL_FOG); |
---|
| 633 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_FOG"); |
---|
[bb1f293] | 634 | |
---|
[78924eb] | 635 | // Just a simple 2D projection. |
---|
[bb1f293] | 636 | glMatrixMode(GL_PROJECTION); |
---|
| 637 | CHECK_GL_ERROR("SetIndicatorTransform", "glMatrixMode"); |
---|
| 638 | glLoadIdentity(); |
---|
| 639 | CHECK_GL_ERROR("SetIndicatorTransform", "glLoadIdentity (2)"); |
---|
[1eeb55a] | 640 | gluOrtho2D(0, window_width, 0, window_height); |
---|
[bb1f293] | 641 | CHECK_GL_ERROR("SetIndicatorTransform", "gluOrtho2D"); |
---|
[a517825] | 642 | |
---|
[78924eb] | 643 | // No modelview transform. |
---|
| 644 | glMatrixMode(GL_MODELVIEW); |
---|
| 645 | CHECK_GL_ERROR("SetIndicatorTransform", "glMatrixMode"); |
---|
| 646 | glLoadIdentity(); |
---|
| 647 | CHECK_GL_ERROR("SetIndicatorTransform", "glLoadIdentity"); |
---|
| 648 | |
---|
[a517825] | 649 | glDisable(GL_TEXTURE_2D); |
---|
[6adffadf] | 650 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_TEXTURE_2D"); |
---|
[e4d40792] | 651 | glDisable(GL_BLEND); |
---|
[6adffadf] | 652 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_BLEND"); |
---|
[36c3285] | 653 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); |
---|
[9baa53a] | 654 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_WRAP_S"); |
---|
[36c3285] | 655 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); |
---|
[9baa53a] | 656 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_WRAP_T"); |
---|
[36c3285] | 657 | glAlphaFunc(GL_GREATER, 0.5f); |
---|
[9baa53a] | 658 | CHECK_GL_ERROR("SetIndicatorTransform", "glAlphaFunc"); |
---|
[096e56c] | 659 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
---|
[9baa53a] | 660 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
---|
[36c3285] | 661 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
---|
[9baa53a] | 662 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
[36c3285] | 663 | glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST); |
---|
[9baa53a] | 664 | CHECK_GL_ERROR("SetIndicatorTransform", "glHint"); |
---|
[56da40e] | 665 | } |
---|
| 666 | |
---|
| 667 | void GLACanvas::FinishDrawing() |
---|
| 668 | { |
---|
| 669 | // Complete a redraw operation. |
---|
[096e56c] | 670 | |
---|
[203d2a7] | 671 | // glFlush(); |
---|
| 672 | // CHECK_GL_ERROR("FinishDrawing", "glFlush"); |
---|
[56da40e] | 673 | SwapBuffers(); |
---|
| 674 | } |
---|
| 675 | |
---|
[d2fcc9b] | 676 | void GLACanvas::DrawList(unsigned int l) |
---|
[56da40e] | 677 | { |
---|
[4ba80e0] | 678 | // FIXME: uncomment to disable use of lists for debugging: |
---|
| 679 | // GenerateList(l); return; |
---|
[d2fcc9b] | 680 | if (l >= drawing_lists.size()) drawing_lists.resize(l + 1); |
---|
[bae6a7c] | 681 | |
---|
[d2fcc9b] | 682 | // We generate the OpenGL lists lazily to minimise delays on startup. |
---|
| 683 | // So check if we need to generate the OpenGL list now. |
---|
[db59b02] | 684 | if (!drawing_lists[l] && !drawing_lists[l].test_flag(NEVER_CACHE)) { |
---|
[bae6a7c] | 685 | // Create a new OpenGL list to hold this sequence of drawing |
---|
| 686 | // operations. |
---|
[d2fcc9b] | 687 | GLuint list = glGenLists(1); |
---|
[6adffadf] | 688 | #ifdef GLA_DEBUG |
---|
[d2fcc9b] | 689 | printf("new list #%d: %d... ", l, list); |
---|
| 690 | m_Vertices = 0; |
---|
[6adffadf] | 691 | #endif |
---|
[9baa53a] | 692 | CHECK_GL_ERROR("DrawList", "glGenLists"); |
---|
[c071520] | 693 | if (list == 0) { |
---|
| 694 | // If we can't create a list, fall back to just drawing directly. |
---|
| 695 | GenerateList(l); |
---|
| 696 | return; |
---|
| 697 | } |
---|
[096e56c] | 698 | |
---|
[6f5f9e5] | 699 | // We should have 256 lists for font drawing and a dozen or so for 2D |
---|
| 700 | // and 3D lists. So something is amiss if we've generated 1000 lists, |
---|
| 701 | // probably a infinite loop in the lazy list mechanism. |
---|
| 702 | assert(list < 1000); |
---|
| 703 | |
---|
[d2fcc9b] | 704 | // http://www.opengl.org/resources/faq/technical/displaylist.htm |
---|
| 705 | // advises: |
---|
| 706 | // "Stay away from GL_COMPILE_AND_EXECUTE mode. Instead, create the |
---|
| 707 | // list using GL_COMPILE mode, then execute it with glCallList()." |
---|
[bae6a7c] | 708 | glNewList(list, GL_COMPILE); |
---|
[9baa53a] | 709 | CHECK_GL_ERROR("DrawList", "glNewList"); |
---|
[db59b02] | 710 | // Clear list_flags so that we can note what conditions to invalidate |
---|
| 711 | // the cached OpenGL list on. |
---|
| 712 | list_flags = 0; |
---|
[d2fcc9b] | 713 | GenerateList(l); |
---|
[bae6a7c] | 714 | glEndList(); |
---|
[9baa53a] | 715 | CHECK_GL_ERROR("DrawList", "glEndList"); |
---|
[edb6576] | 716 | #ifdef GLA_DEBUG |
---|
[bae6a7c] | 717 | printf("done (%d vertices)\n", m_Vertices); |
---|
[edb6576] | 718 | #endif |
---|
[db59b02] | 719 | drawing_lists[l] = GLAList(list, list_flags); |
---|
[bae6a7c] | 720 | } |
---|
[ee78822] | 721 | |
---|
[db59b02] | 722 | if (drawing_lists[l].test_flag(NEVER_CACHE)) { |
---|
| 723 | // That list can't be cached. |
---|
| 724 | GenerateList(l); |
---|
| 725 | } else { |
---|
| 726 | // Perform the operations specified by the OpenGL display list. |
---|
| 727 | drawing_lists[l].DrawList(); |
---|
| 728 | } |
---|
[56da40e] | 729 | } |
---|
| 730 | |
---|
[76dd228] | 731 | void GLACanvas::DrawList2D(unsigned int l, glaCoord x, glaCoord y, Double rotation) |
---|
| 732 | { |
---|
| 733 | glMatrixMode(GL_PROJECTION); |
---|
| 734 | CHECK_GL_ERROR("DrawList2D", "glMatrixMode"); |
---|
| 735 | glPushMatrix(); |
---|
| 736 | CHECK_GL_ERROR("DrawList2D", "glPushMatrix"); |
---|
| 737 | glTranslated(x, y, 0); |
---|
| 738 | CHECK_GL_ERROR("DrawList2D", "glTranslated"); |
---|
| 739 | if (rotation != 0.0) { |
---|
| 740 | glRotated(rotation, 0, 0, -1); |
---|
| 741 | CHECK_GL_ERROR("DrawList2D", "glRotated"); |
---|
| 742 | } |
---|
| 743 | DrawList(l); |
---|
| 744 | glMatrixMode(GL_PROJECTION); |
---|
| 745 | CHECK_GL_ERROR("DrawList2D", "glMatrixMode 2"); |
---|
| 746 | glPopMatrix(); |
---|
| 747 | CHECK_GL_ERROR("DrawList2D", "glPopMatrix"); |
---|
| 748 | } |
---|
| 749 | |
---|
[d2fcc9b] | 750 | void GLACanvas::InvalidateList(unsigned int l) |
---|
[56da40e] | 751 | { |
---|
[d2fcc9b] | 752 | if (l < drawing_lists.size() && drawing_lists[l]) { |
---|
[bae6a7c] | 753 | // Delete any existing OpenGL list. |
---|
[db59b02] | 754 | drawing_lists[l].InvalidateList(); |
---|
[37d7084] | 755 | } |
---|
| 756 | } |
---|
| 757 | |
---|
[56da40e] | 758 | void GLACanvas::SetBackgroundColour(float red, float green, float blue) |
---|
| 759 | { |
---|
| 760 | // Set the background colour of the canvas. |
---|
[096e56c] | 761 | |
---|
[56da40e] | 762 | glClearColor(red, green, blue, 1.0); |
---|
[1897247] | 763 | CHECK_GL_ERROR("SetBackgroundColour", "glClearColor"); |
---|
[56da40e] | 764 | } |
---|
| 765 | |
---|
[aa048c3] | 766 | void GLACanvas::SetColour(const GLAPen& pen, double rgb_scale) |
---|
[56da40e] | 767 | { |
---|
| 768 | // Set the colour for subsequent operations. |
---|
[aa048c3] | 769 | glColor3f(pen.GetRed() * rgb_scale, pen.GetGreen() * rgb_scale, |
---|
| 770 | pen.GetBlue() * rgb_scale); |
---|
[56da40e] | 771 | } |
---|
| 772 | |
---|
[aa048c3] | 773 | void GLACanvas::SetColour(const GLAPen& pen) |
---|
[f383708] | 774 | { |
---|
[aa048c3] | 775 | // Set the colour for subsequent operations. |
---|
| 776 | glColor3dv(pen.components); |
---|
[f383708] | 777 | } |
---|
| 778 | |
---|
[aa048c3] | 779 | void GLACanvas::SetColour(gla_colour colour) |
---|
[56da40e] | 780 | { |
---|
[aa048c3] | 781 | // Set the colour for subsequent operations. |
---|
| 782 | glColor3ubv(&COLOURS[colour].r); |
---|
[56da40e] | 783 | } |
---|
| 784 | |
---|
| 785 | void GLACanvas::DrawText(glaCoord x, glaCoord y, glaCoord z, const wxString& str) |
---|
| 786 | { |
---|
| 787 | // Draw a text string on the current buffer in the current font. |
---|
[1eeb55a] | 788 | #ifdef USE_FNT |
---|
| 789 | GLdouble X, Y, Z; |
---|
| 790 | if (!gluProject(x, y, z, modelview_matrix, projection_matrix, viewport, |
---|
| 791 | &X, &Y, &Z)) return; |
---|
[3f8b339] | 792 | // Only draw text which is in front of the viewer. |
---|
[36c3285] | 793 | if (Z > 0) DrawIndicatorText((int)X, (int)Y, str); |
---|
[1eeb55a] | 794 | #else |
---|
[56da40e] | 795 | glRasterPos3d(x, y, z); |
---|
[1897247] | 796 | CHECK_GL_ERROR("DrawText", "glRasterPos3d"); |
---|
[fc4ee5b] | 797 | |
---|
| 798 | #ifdef FREEGLUT |
---|
| 799 | glutBitmapString(m_Font, (const unsigned char *)str.c_str()); |
---|
| 800 | CHECK_GL_ERROR("DrawText", "glutBitmapString"); |
---|
| 801 | #else |
---|
[4252768] | 802 | for (size_t pos = 0; pos < str.length(); pos++) { |
---|
[d4cb449] | 803 | glutBitmapCharacter(m_Font, int((unsigned char)str[pos])); |
---|
[1897247] | 804 | CHECK_GL_ERROR("DrawText", "glutBitmapCharacter"); |
---|
[56da40e] | 805 | } |
---|
[fc4ee5b] | 806 | #endif |
---|
[1eeb55a] | 807 | #endif |
---|
[56da40e] | 808 | } |
---|
| 809 | |
---|
[1eeb55a] | 810 | void GLACanvas::DrawIndicatorText(int x, int y, const wxString& str) |
---|
[56da40e] | 811 | { |
---|
[1eeb55a] | 812 | #ifdef USE_FNT |
---|
[5b13e4c] | 813 | glPushAttrib(GL_ENABLE_BIT); |
---|
[1eeb55a] | 814 | glEnable(GL_ALPHA_TEST); |
---|
[5b13e4c] | 815 | glEnable(GL_TEXTURE_2D); |
---|
| 816 | glDisable(GL_DEPTH_TEST); |
---|
[1eeb55a] | 817 | m_Font.puts(x, y, str.c_str()); |
---|
| 818 | glPopAttrib(); |
---|
| 819 | #else |
---|
[087bc72] | 820 | DrawText(x, y, 0.0, str); |
---|
[1eeb55a] | 821 | #endif |
---|
[56da40e] | 822 | } |
---|
| 823 | |
---|
[1eeb55a] | 824 | void GLACanvas::GetTextExtent(const wxString& str, int * x_ext, int * y_ext) |
---|
[56da40e] | 825 | { |
---|
[1eeb55a] | 826 | #ifdef USE_FNT |
---|
[aa048c3] | 827 | m_Font.getTextExtent(str.c_str(), x_ext, y_ext); |
---|
[1eeb55a] | 828 | #else |
---|
[d92d282] | 829 | if (x_ext) { |
---|
[d4cb449] | 830 | #if 1 |
---|
[d92d282] | 831 | *x_ext = glutBitmapLength(m_Font, (const unsigned char *)str.c_str()); |
---|
| 832 | CHECK_GL_ERROR("GetTextExtent", "glutBitmapLength"); |
---|
[d4cb449] | 833 | #else |
---|
[d92d282] | 834 | *x_ext = 0; |
---|
[4252768] | 835 | for (size_t pos = 0; pos < str.length(); pos++) { |
---|
[d92d282] | 836 | x_ext += glutBitmapWidth(m_Font, int((unsigned char)str[pos])); |
---|
| 837 | CHECK_GL_ERROR("GetTextExtent", "glutBitmapWidth"); |
---|
| 838 | } |
---|
[d4cb449] | 839 | #endif |
---|
[d92d282] | 840 | } |
---|
| 841 | if (y_ext) *y_ext = m_FontSize + 2; |
---|
[1eeb55a] | 842 | #endif |
---|
[56da40e] | 843 | } |
---|
| 844 | |
---|
| 845 | void GLACanvas::BeginQuadrilaterals() |
---|
| 846 | { |
---|
| 847 | // Commence drawing of quadrilaterals. |
---|
[096e56c] | 848 | |
---|
[56da40e] | 849 | glBegin(GL_QUADS); |
---|
| 850 | } |
---|
| 851 | |
---|
| 852 | void GLACanvas::EndQuadrilaterals() |
---|
| 853 | { |
---|
| 854 | // Finish drawing of quadrilaterals. |
---|
[096e56c] | 855 | |
---|
[56da40e] | 856 | glEnd(); |
---|
[9baa53a] | 857 | CHECK_GL_ERROR("EndQuadrilaterals", "glEnd GL_QUADS"); |
---|
[56da40e] | 858 | } |
---|
| 859 | |
---|
| 860 | void GLACanvas::BeginLines() |
---|
| 861 | { |
---|
| 862 | // Commence drawing of a set of lines. |
---|
| 863 | |
---|
| 864 | glBegin(GL_LINES); |
---|
| 865 | } |
---|
| 866 | |
---|
| 867 | void GLACanvas::EndLines() |
---|
| 868 | { |
---|
| 869 | // Finish drawing of a set of lines. |
---|
| 870 | |
---|
| 871 | glEnd(); |
---|
[9baa53a] | 872 | CHECK_GL_ERROR("EndLines", "glEnd GL_LINES"); |
---|
[56da40e] | 873 | } |
---|
| 874 | |
---|
| 875 | void GLACanvas::BeginTriangles() |
---|
| 876 | { |
---|
| 877 | // Commence drawing of a set of triangles. |
---|
| 878 | |
---|
| 879 | glBegin(GL_TRIANGLES); |
---|
| 880 | } |
---|
| 881 | |
---|
| 882 | void GLACanvas::EndTriangles() |
---|
| 883 | { |
---|
| 884 | // Finish drawing of a set of triangles. |
---|
| 885 | |
---|
| 886 | glEnd(); |
---|
[9baa53a] | 887 | CHECK_GL_ERROR("EndTriangles", "glEnd GL_TRIANGLES"); |
---|
[56da40e] | 888 | } |
---|
| 889 | |
---|
[dde4fe7] | 890 | void GLACanvas::BeginTriangleStrip() |
---|
| 891 | { |
---|
| 892 | // Commence drawing of a triangle strip. |
---|
| 893 | |
---|
| 894 | glBegin(GL_TRIANGLE_STRIP); |
---|
| 895 | } |
---|
| 896 | |
---|
| 897 | void GLACanvas::EndTriangleStrip() |
---|
| 898 | { |
---|
| 899 | // Finish drawing of a triangle strip. |
---|
| 900 | |
---|
| 901 | glEnd(); |
---|
[9baa53a] | 902 | CHECK_GL_ERROR("EndTriangleStrip", "glEnd GL_TRIANGLE_STRIP"); |
---|
[dde4fe7] | 903 | } |
---|
| 904 | |
---|
[56da40e] | 905 | void GLACanvas::BeginPolyline() |
---|
| 906 | { |
---|
| 907 | // Commence drawing of a polyline. |
---|
| 908 | |
---|
| 909 | glBegin(GL_LINE_STRIP); |
---|
| 910 | } |
---|
| 911 | |
---|
| 912 | void GLACanvas::EndPolyline() |
---|
| 913 | { |
---|
| 914 | // Finish drawing of a polyline. |
---|
[096e56c] | 915 | |
---|
[56da40e] | 916 | glEnd(); |
---|
[9baa53a] | 917 | CHECK_GL_ERROR("EndPolyline", "glEnd GL_LINE_STRIP"); |
---|
[56da40e] | 918 | } |
---|
| 919 | |
---|
[45aa1d6] | 920 | void GLACanvas::BeginPolygon() |
---|
| 921 | { |
---|
| 922 | // Commence drawing of a polygon. |
---|
| 923 | |
---|
| 924 | glBegin(GL_POLYGON); |
---|
| 925 | } |
---|
| 926 | |
---|
| 927 | void GLACanvas::EndPolygon() |
---|
| 928 | { |
---|
| 929 | // Finish drawing of a polygon. |
---|
[096e56c] | 930 | |
---|
[45aa1d6] | 931 | glEnd(); |
---|
[9baa53a] | 932 | CHECK_GL_ERROR("EndPolygon", "glEnd GL_POLYGON"); |
---|
[45aa1d6] | 933 | } |
---|
| 934 | |
---|
[56da40e] | 935 | void GLACanvas::PlaceVertex(glaCoord x, glaCoord y, glaCoord z) |
---|
| 936 | { |
---|
| 937 | // Place a vertex for the current object being drawn. |
---|
| 938 | |
---|
[edb6576] | 939 | #ifdef GLA_DEBUG |
---|
| 940 | m_Vertices++; |
---|
| 941 | #endif |
---|
[56da40e] | 942 | glVertex3d(x, y, z); |
---|
| 943 | } |
---|
| 944 | |
---|
| 945 | void GLACanvas::PlaceIndicatorVertex(glaCoord x, glaCoord y) |
---|
| 946 | { |
---|
| 947 | // Place a vertex for the current indicator object being drawn. |
---|
| 948 | |
---|
[087bc72] | 949 | PlaceVertex(x, y, 0.0); |
---|
[56da40e] | 950 | } |
---|
| 951 | |
---|
[e633bb1] | 952 | void GLACanvas::BeginBlobs() |
---|
[d9b3270] | 953 | { |
---|
[4ba80e0] | 954 | if (glpoint_ok) { |
---|
| 955 | // Commence drawing of a set of blobs. |
---|
[78924eb] | 956 | glPushAttrib(GL_ENABLE_BIT); |
---|
| 957 | CHECK_GL_ERROR("BeginBlobs", "glPushAttrib"); |
---|
[4ba80e0] | 958 | glEnable(GL_ALPHA_TEST); |
---|
| 959 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_ALPHA_TEST"); |
---|
| 960 | glEnable(GL_POINT_SMOOTH); |
---|
| 961 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_POINT_SMOOTH"); |
---|
| 962 | glBegin(GL_POINTS); |
---|
| 963 | } else { |
---|
[6662d02] | 964 | glPushAttrib(GL_TRANSFORM_BIT|GL_VIEWPORT_BIT|GL_ENABLE_BIT); |
---|
[4ba80e0] | 965 | CHECK_GL_ERROR("BeginBlobs", "glPushAttrib"); |
---|
| 966 | SetIndicatorTransform(); |
---|
[6f5f9e5] | 967 | glEnable(GL_DEPTH_TEST); |
---|
| 968 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_DEPTH_TEST"); |
---|
[4ba80e0] | 969 | } |
---|
[e633bb1] | 970 | } |
---|
[d9b3270] | 971 | |
---|
[e633bb1] | 972 | void GLACanvas::EndBlobs() |
---|
| 973 | { |
---|
[4ba80e0] | 974 | if (glpoint_ok) { |
---|
| 975 | // Finish drawing of a set of blobs. |
---|
| 976 | glEnd(); |
---|
| 977 | CHECK_GL_ERROR("EndBlobs", "GL_POINTS"); |
---|
| 978 | } |
---|
[78924eb] | 979 | glPopAttrib(); |
---|
| 980 | CHECK_GL_ERROR("EndBlobs", "glPopAttrib"); |
---|
[e633bb1] | 981 | } |
---|
[d9b3270] | 982 | |
---|
[e633bb1] | 983 | void GLACanvas::DrawBlob(glaCoord x, glaCoord y, glaCoord z) |
---|
| 984 | { |
---|
[4ba80e0] | 985 | if (glpoint_ok) { |
---|
| 986 | // Draw a marker. |
---|
| 987 | PlaceVertex(x, y, z); |
---|
| 988 | } else { |
---|
| 989 | Double X, Y, Z; |
---|
[d67450e] | 990 | if (!Transform(Vector3(x, y, z), &X, &Y, &Z)) { |
---|
[4ba80e0] | 991 | printf("bad transform\n"); |
---|
| 992 | return; |
---|
| 993 | } |
---|
| 994 | // Stuff behind us (in perspective view) will get clipped, |
---|
| 995 | // but we can save effort with a cheap check here. |
---|
| 996 | if (Z <= 0) return; |
---|
| 997 | |
---|
| 998 | // Draw an filled circle. |
---|
| 999 | assert(m_Quadric); |
---|
| 1000 | glTranslated(X, Y, Z); |
---|
[9baa53a] | 1001 | CHECK_GL_ERROR("DrawBlob", "glTranslated 1"); |
---|
[4ba80e0] | 1002 | gluDisk(m_Quadric, 0, BLOB_DIAMETER * 0.5, 8, 1); |
---|
[9baa53a] | 1003 | CHECK_GL_ERROR("DrawBlob", "gluDisk"); |
---|
[4ba80e0] | 1004 | glTranslated(-X, -Y, -Z); |
---|
[9baa53a] | 1005 | CHECK_GL_ERROR("DrawBlob", "glTranslated 2"); |
---|
[78924eb] | 1006 | } |
---|
[95ce35f] | 1007 | #ifdef GLA_DEBUG |
---|
[78924eb] | 1008 | m_Vertices++; |
---|
[95ce35f] | 1009 | #endif |
---|
[429465a] | 1010 | } |
---|
| 1011 | |
---|
[81aea4e] | 1012 | void GLACanvas::DrawBlob(glaCoord x, glaCoord y) |
---|
| 1013 | { |
---|
| 1014 | if (glpoint_ok) { |
---|
| 1015 | // Draw a marker. |
---|
| 1016 | PlaceVertex(x, y, 0); |
---|
| 1017 | } else { |
---|
| 1018 | // Draw an filled circle. |
---|
| 1019 | assert(m_Quadric); |
---|
| 1020 | glTranslated(x, y, 0); |
---|
[9baa53a] | 1021 | CHECK_GL_ERROR("DrawBlob 2", "glTranslated 1"); |
---|
[81aea4e] | 1022 | gluDisk(m_Quadric, 0, BLOB_DIAMETER * 0.5, 8, 1); |
---|
[9baa53a] | 1023 | CHECK_GL_ERROR("DrawBlob 2", "gluDisk"); |
---|
[81aea4e] | 1024 | glTranslated(-x, -y, 0); |
---|
[9baa53a] | 1025 | CHECK_GL_ERROR("DrawBlob 2", "glTranslated 2"); |
---|
[81aea4e] | 1026 | } |
---|
| 1027 | #ifdef GLA_DEBUG |
---|
| 1028 | m_Vertices++; |
---|
| 1029 | #endif |
---|
| 1030 | } |
---|
| 1031 | |
---|
[86fe6e4] | 1032 | void GLACanvas::BeginCrosses() |
---|
| 1033 | { |
---|
[95ce35f] | 1034 | // Plot crosses. |
---|
| 1035 | if (glpoint_sprite) { |
---|
| 1036 | glPushAttrib(GL_ENABLE_BIT|GL_POINT_BIT); |
---|
[9baa53a] | 1037 | CHECK_GL_ERROR("BeginCrosses", "glPushAttrib"); |
---|
[95ce35f] | 1038 | glBindTexture(GL_TEXTURE_2D, m_CrossTexture); |
---|
[9baa53a] | 1039 | CHECK_GL_ERROR("BeginCrosses", "glBindTexture"); |
---|
[95ce35f] | 1040 | glEnable(GL_ALPHA_TEST); |
---|
[9baa53a] | 1041 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_ALPHA_TEST"); |
---|
[95ce35f] | 1042 | glPointSize(8); |
---|
[9baa53a] | 1043 | CHECK_GL_ERROR("BeginCrosses", "glPointSize"); |
---|
| 1044 | glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE); |
---|
| 1045 | CHECK_GL_ERROR("BeginCrosses", "glTexEnvi GL_POINT_SPRITE"); |
---|
[95ce35f] | 1046 | glEnable(GL_TEXTURE_2D); |
---|
[9baa53a] | 1047 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_TEXTURE_2D"); |
---|
| 1048 | glEnable(GL_POINT_SPRITE); |
---|
| 1049 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_POINT_SPRITE"); |
---|
[95ce35f] | 1050 | glBegin(GL_POINTS); |
---|
| 1051 | } else { |
---|
| 1052 | // To get the crosses to appear at a constant size and orientation on |
---|
| 1053 | // screen, we plot them in the Indicator transform coordinates (which |
---|
| 1054 | // unfortunately means they can't be usefully put in an opengl display |
---|
| 1055 | // list). |
---|
[6662d02] | 1056 | glPushAttrib(GL_TRANSFORM_BIT|GL_VIEWPORT_BIT|GL_ENABLE_BIT); |
---|
[9baa53a] | 1057 | CHECK_GL_ERROR("BeginCrosses", "glPushAttrib 2"); |
---|
[95ce35f] | 1058 | SetIndicatorTransform(); |
---|
[6f5f9e5] | 1059 | glEnable(GL_DEPTH_TEST); |
---|
[9baa53a] | 1060 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_DEPTH_TEST"); |
---|
[95ce35f] | 1061 | glBegin(GL_LINES); |
---|
| 1062 | } |
---|
[86fe6e4] | 1063 | } |
---|
| 1064 | |
---|
| 1065 | void GLACanvas::EndCrosses() |
---|
| 1066 | { |
---|
[95ce35f] | 1067 | glEnd(); |
---|
[9baa53a] | 1068 | if (glpoint_sprite) { |
---|
| 1069 | CHECK_GL_ERROR("EndCrosses", "glEnd GL_POINTS"); |
---|
| 1070 | } else { |
---|
| 1071 | CHECK_GL_ERROR("EndCrosses", "glEnd GL_LINES"); |
---|
| 1072 | } |
---|
[86fe6e4] | 1073 | glPopAttrib(); |
---|
| 1074 | CHECK_GL_ERROR("EndCrosses", "glPopAttrib"); |
---|
| 1075 | } |
---|
| 1076 | |
---|
| 1077 | void GLACanvas::DrawCross(glaCoord x, glaCoord y, glaCoord z) |
---|
| 1078 | { |
---|
[95ce35f] | 1079 | if (glpoint_sprite) { |
---|
| 1080 | PlaceVertex(x, y, z); |
---|
| 1081 | } else { |
---|
| 1082 | Double X, Y, Z; |
---|
[d67450e] | 1083 | if (!Transform(Vector3(x, y, z), &X, &Y, &Z)) { |
---|
[95ce35f] | 1084 | printf("bad transform\n"); |
---|
| 1085 | return; |
---|
| 1086 | } |
---|
| 1087 | // Stuff behind us (in perspective view) will get clipped, |
---|
| 1088 | // but we can save effort with a cheap check here. |
---|
| 1089 | if (Z > 0) { |
---|
| 1090 | // Round to integers before adding on the offsets for the |
---|
| 1091 | // cross arms to avoid uneven crosses. |
---|
| 1092 | X = rint(X); |
---|
| 1093 | Y = rint(Y); |
---|
| 1094 | PlaceVertex(X - 3, Y - 3, Z); |
---|
| 1095 | PlaceVertex(X + 3, Y + 3, Z); |
---|
| 1096 | PlaceVertex(X - 3, Y + 3, Z); |
---|
| 1097 | PlaceVertex(X + 3, Y - 3, Z); |
---|
| 1098 | } |
---|
[86fe6e4] | 1099 | } |
---|
[78924eb] | 1100 | #ifdef GLA_DEBUG |
---|
| 1101 | m_Vertices++; |
---|
| 1102 | #endif |
---|
[86fe6e4] | 1103 | } |
---|
| 1104 | |
---|
[e633bb1] | 1105 | void GLACanvas::DrawRing(glaCoord x, glaCoord y) |
---|
[429465a] | 1106 | { |
---|
| 1107 | // Draw an unfilled circle |
---|
[096e56c] | 1108 | const Double radius = 4; |
---|
[429465a] | 1109 | assert(m_Quadric); |
---|
[78924eb] | 1110 | glMatrixMode(GL_MODELVIEW); |
---|
| 1111 | CHECK_GL_ERROR("DrawRing", "glMatrixMode"); |
---|
| 1112 | glPushMatrix(); |
---|
| 1113 | CHECK_GL_ERROR("DrawRing", "glPushMatrix"); |
---|
[429465a] | 1114 | glTranslated(x, y, 0.0); |
---|
| 1115 | CHECK_GL_ERROR("DrawRing", "glTranslated"); |
---|
| 1116 | gluDisk(m_Quadric, radius - 1.0, radius, 12, 1); |
---|
| 1117 | CHECK_GL_ERROR("DrawRing", "gluDisk"); |
---|
[78924eb] | 1118 | glPopMatrix(); |
---|
| 1119 | CHECK_GL_ERROR("DrawRing", "glPopMatrix"); |
---|
[d9b3270] | 1120 | } |
---|
| 1121 | |
---|
[aa048c3] | 1122 | void GLACanvas::DrawRectangle(gla_colour edge, gla_colour fill, |
---|
| 1123 | glaCoord x0, glaCoord y0, glaCoord w, glaCoord h) |
---|
[56da40e] | 1124 | { |
---|
| 1125 | // Draw a filled rectangle with an edge in the indicator plane. |
---|
[ca8c864] | 1126 | // (x0, y0) specify the bottom-left corner of the rectangle and (w, h) the |
---|
| 1127 | // size. |
---|
[56da40e] | 1128 | |
---|
[c10dd28] | 1129 | SetColour(fill); |
---|
[aa048c3] | 1130 | BeginQuadrilaterals(); |
---|
[56da40e] | 1131 | PlaceIndicatorVertex(x0, y0); |
---|
| 1132 | PlaceIndicatorVertex(x0 + w, y0); |
---|
| 1133 | PlaceIndicatorVertex(x0 + w, y0 + h); |
---|
| 1134 | PlaceIndicatorVertex(x0, y0 + h); |
---|
| 1135 | EndQuadrilaterals(); |
---|
| 1136 | |
---|
[aa048c3] | 1137 | if (edge != fill) { |
---|
[c10dd28] | 1138 | SetColour(edge); |
---|
| 1139 | BeginLines(); |
---|
| 1140 | PlaceIndicatorVertex(x0, y0); |
---|
| 1141 | PlaceIndicatorVertex(x0 + w, y0); |
---|
| 1142 | PlaceIndicatorVertex(x0 + w, y0 + h); |
---|
| 1143 | PlaceIndicatorVertex(x0, y0 + h); |
---|
| 1144 | EndLines(); |
---|
| 1145 | } |
---|
[56da40e] | 1146 | } |
---|
| 1147 | |
---|
[aa048c3] | 1148 | void |
---|
| 1149 | GLACanvas::DrawShadedRectangle(const GLAPen & fill_bot, const GLAPen & fill_top, |
---|
| 1150 | glaCoord x0, glaCoord y0, |
---|
| 1151 | glaCoord w, glaCoord h) |
---|
| 1152 | { |
---|
| 1153 | // Draw a graduated filled rectangle in the indicator plane. |
---|
| 1154 | // (x0, y0) specify the bottom-left corner of the rectangle and (w, h) the |
---|
| 1155 | // size. |
---|
| 1156 | |
---|
[02aa4d4] | 1157 | glShadeModel(GL_SMOOTH); |
---|
[9baa53a] | 1158 | CHECK_GL_ERROR("DrawShadedRectangle", "glShadeModel GL_SMOOTH"); |
---|
[aa048c3] | 1159 | BeginQuadrilaterals(); |
---|
| 1160 | SetColour(fill_bot); |
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| 1161 | PlaceIndicatorVertex(x0, y0); |
---|
| 1162 | PlaceIndicatorVertex(x0 + w, y0); |
---|
| 1163 | SetColour(fill_top); |
---|
| 1164 | PlaceIndicatorVertex(x0 + w, y0 + h); |
---|
| 1165 | PlaceIndicatorVertex(x0, y0 + h); |
---|
| 1166 | EndQuadrilaterals(); |
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[02aa4d4] | 1167 | glShadeModel(GL_FLAT); |
---|
[9baa53a] | 1168 | CHECK_GL_ERROR("DrawShadedRectangle", "glShadeModel GL_FLAT"); |
---|
[aa048c3] | 1169 | } |
---|
| 1170 | |
---|
| 1171 | void GLACanvas::DrawCircle(gla_colour edge, gla_colour fill, |
---|
| 1172 | glaCoord cx, glaCoord cy, glaCoord radius) |
---|
[56da40e] | 1173 | { |
---|
[087bc72] | 1174 | // Draw a filled circle with an edge. |
---|
[56da40e] | 1175 | SetColour(fill); |
---|
[78924eb] | 1176 | glMatrixMode(GL_MODELVIEW); |
---|
| 1177 | CHECK_GL_ERROR("DrawCircle", "glMatrixMode"); |
---|
| 1178 | glPushMatrix(); |
---|
| 1179 | CHECK_GL_ERROR("DrawCircle", "glPushMatrix"); |
---|
[56da40e] | 1180 | glTranslated(cx, cy, 0.0); |
---|
[8326157] | 1181 | CHECK_GL_ERROR("DrawCircle", "glTranslated"); |
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[1b12b82] | 1182 | assert(m_Quadric); |
---|
| 1183 | gluDisk(m_Quadric, 0.0, radius, 36, 1); |
---|
[8326157] | 1184 | CHECK_GL_ERROR("DrawCircle", "gluDisk"); |
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[56da40e] | 1185 | SetColour(edge); |
---|
[1b12b82] | 1186 | gluDisk(m_Quadric, radius - 1.0, radius, 36, 1); |
---|
[8326157] | 1187 | CHECK_GL_ERROR("DrawCircle", "gluDisk (2)"); |
---|
[78924eb] | 1188 | glPopMatrix(); |
---|
| 1189 | CHECK_GL_ERROR("DrawCircle", "glPopMatrix"); |
---|
[56da40e] | 1190 | } |
---|
| 1191 | |
---|
[aa048c3] | 1192 | void GLACanvas::DrawSemicircle(gla_colour edge, gla_colour fill, |
---|
[1b12b82] | 1193 | glaCoord cx, glaCoord cy, |
---|
| 1194 | glaCoord radius, glaCoord start) |
---|
[56da40e] | 1195 | { |
---|
| 1196 | // Draw a filled semicircle with an edge. |
---|
[ca8c864] | 1197 | // The semicircle extends from "start" deg to "start"+180 deg (increasing |
---|
| 1198 | // clockwise, 0 deg upwards). |
---|
[56da40e] | 1199 | SetColour(fill); |
---|
[78924eb] | 1200 | glMatrixMode(GL_MODELVIEW); |
---|
| 1201 | CHECK_GL_ERROR("DrawSemicircle", "glMatrixMode"); |
---|
| 1202 | glPushMatrix(); |
---|
| 1203 | CHECK_GL_ERROR("DrawSemicircle", "glPushMatrix"); |
---|
[56da40e] | 1204 | glTranslated(cx, cy, 0.0); |
---|
[78924eb] | 1205 | CHECK_GL_ERROR("DrawSemicircle", "glTranslated"); |
---|
[1b12b82] | 1206 | assert(m_Quadric); |
---|
| 1207 | gluPartialDisk(m_Quadric, 0.0, radius, 36, 1, start, 180.0); |
---|
[78924eb] | 1208 | CHECK_GL_ERROR("DrawSemicircle", "gluPartialDisk"); |
---|
[56da40e] | 1209 | SetColour(edge); |
---|
[1b12b82] | 1210 | gluPartialDisk(m_Quadric, radius - 1.0, radius, 36, 1, start, 180.0); |
---|
[78924eb] | 1211 | CHECK_GL_ERROR("DrawSemicircle", "gluPartialDisk (2)"); |
---|
| 1212 | glPopMatrix(); |
---|
| 1213 | CHECK_GL_ERROR("DrawSemicircle", "glPopMatrix"); |
---|
[56da40e] | 1214 | } |
---|
| 1215 | |
---|
[d67450e] | 1216 | void |
---|
| 1217 | GLACanvas::DrawTriangle(gla_colour edge, gla_colour fill, |
---|
| 1218 | const Vector3 &p0, const Vector3 &p1, const Vector3 &p2) |
---|
[56da40e] | 1219 | { |
---|
[ca8c864] | 1220 | // Draw a filled triangle with an edge. |
---|
[096e56c] | 1221 | |
---|
[56da40e] | 1222 | SetColour(fill); |
---|
| 1223 | BeginTriangles(); |
---|
[d67450e] | 1224 | PlaceIndicatorVertex(p0.GetX(), p0.GetY()); |
---|
| 1225 | PlaceIndicatorVertex(p1.GetX(), p1.GetY()); |
---|
| 1226 | PlaceIndicatorVertex(p2.GetX(), p2.GetY()); |
---|
[56da40e] | 1227 | EndTriangles(); |
---|
| 1228 | |
---|
| 1229 | SetColour(edge); |
---|
[d67450e] | 1230 | glBegin(GL_LINE_STRIP); |
---|
| 1231 | PlaceIndicatorVertex(p0.GetX(), p0.GetY()); |
---|
| 1232 | PlaceIndicatorVertex(p1.GetX(), p1.GetY()); |
---|
| 1233 | PlaceIndicatorVertex(p2.GetX(), p2.GetY()); |
---|
| 1234 | glEnd(); |
---|
[9baa53a] | 1235 | CHECK_GL_ERROR("DrawTriangle", "glEnd GL_LINE_STRIP"); |
---|
[56da40e] | 1236 | } |
---|
| 1237 | |
---|
| 1238 | void GLACanvas::EnableDashedLines() |
---|
| 1239 | { |
---|
| 1240 | // Enable dashed lines, and start drawing in them. |
---|
| 1241 | |
---|
[9eb58d0] | 1242 | glLineStipple(1, 0x3333); |
---|
[8326157] | 1243 | CHECK_GL_ERROR("EnableDashedLines", "glLineStipple"); |
---|
[56da40e] | 1244 | glEnable(GL_LINE_STIPPLE); |
---|
[bb1f293] | 1245 | CHECK_GL_ERROR("EnableDashedLines", "glEnable GL_LINE_STIPPLE"); |
---|
[56da40e] | 1246 | } |
---|
| 1247 | |
---|
| 1248 | void GLACanvas::DisableDashedLines() |
---|
| 1249 | { |
---|
| 1250 | glDisable(GL_LINE_STIPPLE); |
---|
[bb1f293] | 1251 | CHECK_GL_ERROR("DisableDashedLines", "glDisable GL_LINE_STIPPLE"); |
---|
[56da40e] | 1252 | } |
---|
| 1253 | |
---|
[d67450e] | 1254 | bool GLACanvas::Transform(const Vector3 & v, |
---|
[3c3ca1d] | 1255 | Double* x_out, Double* y_out, Double* z_out) const |
---|
[56da40e] | 1256 | { |
---|
| 1257 | // Convert from data coordinates to screen coordinates. |
---|
[096e56c] | 1258 | |
---|
[087bc72] | 1259 | // Perform the projection. |
---|
[d67450e] | 1260 | return gluProject(v.GetX(), v.GetY(), v.GetZ(), |
---|
| 1261 | modelview_matrix, projection_matrix, viewport, |
---|
[6adffadf] | 1262 | x_out, y_out, z_out); |
---|
[56da40e] | 1263 | } |
---|
| 1264 | |
---|
[1b12b82] | 1265 | void GLACanvas::ReverseTransform(Double x, Double y, |
---|
[3c3ca1d] | 1266 | Double* x_out, Double* y_out, Double* z_out) const |
---|
[a2b3d62] | 1267 | { |
---|
| 1268 | // Convert from screen coordinates to data coordinates. |
---|
[096e56c] | 1269 | |
---|
[a2b3d62] | 1270 | // Perform the projection. |
---|
[1b12b82] | 1271 | gluUnProject(x, y, 0.0, modelview_matrix, projection_matrix, viewport, |
---|
| 1272 | x_out, y_out, z_out); |
---|
[8326157] | 1273 | CHECK_GL_ERROR("ReverseTransform", "gluUnProject"); |
---|
[a2b3d62] | 1274 | } |
---|
| 1275 | |
---|
[e7f9e99] | 1276 | Double GLACanvas::SurveyUnitsAcrossViewport() const |
---|
[087bc72] | 1277 | { |
---|
[8326157] | 1278 | // Measure the current viewport in survey units, taking into account the |
---|
| 1279 | // current display scale. |
---|
[087bc72] | 1280 | |
---|
[9eb58d0] | 1281 | assert(m_Scale != 0.0); |
---|
[db59b02] | 1282 | list_flags |= INVALIDATE_ON_SCALE; |
---|
[c5fc8eb] | 1283 | return m_VolumeDiameter / m_Scale; |
---|
[087bc72] | 1284 | } |
---|
[045e2af] | 1285 | |
---|
[d67450e] | 1286 | void GLACanvas::ToggleSmoothShading() |
---|
| 1287 | { |
---|
| 1288 | m_SmoothShading = !m_SmoothShading; |
---|
| 1289 | } |
---|
| 1290 | |
---|
[a517825] | 1291 | void GLACanvas::ToggleTextured() |
---|
| 1292 | { |
---|
| 1293 | m_Textured = !m_Textured; |
---|
| 1294 | if (m_Textured && m_Texture == 0) { |
---|
| 1295 | glGenTextures(1, &m_Texture); |
---|
| 1296 | CHECK_GL_ERROR("ToggleTextured", "glGenTextures"); |
---|
| 1297 | |
---|
| 1298 | glBindTexture(GL_TEXTURE_2D, m_Texture); |
---|
| 1299 | CHECK_GL_ERROR("ToggleTextured", "glBindTexture"); |
---|
| 1300 | |
---|
| 1301 | ::wxInitAllImageHandlers(); |
---|
[5627cbb] | 1302 | |
---|
[a517825] | 1303 | wxImage img; |
---|
[5627cbb] | 1304 | wxString texture(msg_cfgpth(), wxConvUTF8); |
---|
| 1305 | texture += wxCONFIG_PATH_SEPARATOR; |
---|
| 1306 | texture += wxT("icons"); |
---|
| 1307 | texture += wxCONFIG_PATH_SEPARATOR; |
---|
| 1308 | texture += wxT("texture.png"); |
---|
| 1309 | if (!img.LoadFile(texture, wxBITMAP_TYPE_PNG)) { |
---|
[a517825] | 1310 | // FIXME |
---|
| 1311 | fprintf(stderr, "Couldn't load image.\n"); |
---|
| 1312 | exit(1); |
---|
| 1313 | } |
---|
[5627cbb] | 1314 | |
---|
[ecbdd96] | 1315 | // Generate mipmaps. |
---|
[7c18431] | 1316 | gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGB, // was GL_LUMINANCE |
---|
[ecbdd96] | 1317 | img.GetWidth(), img.GetHeight(), |
---|
| 1318 | GL_RGB, GL_UNSIGNED_BYTE, img.GetData()); |
---|
| 1319 | CHECK_GL_ERROR("ToggleTextured", "gluBuild2DMipmaps"); |
---|
[a517825] | 1320 | |
---|
| 1321 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
---|
| 1322 | CHECK_GL_ERROR("ToggleTextured", "glTexEnvi"); |
---|
| 1323 | } |
---|
| 1324 | } |
---|
| 1325 | |
---|
[045e2af] | 1326 | bool GLACanvas::SaveScreenshot(const wxString & fnm, int type) const |
---|
| 1327 | { |
---|
| 1328 | int width; |
---|
| 1329 | int height; |
---|
| 1330 | GetSize(&width, &height); |
---|
[1bd4841] | 1331 | unsigned char *pixels = (unsigned char *)malloc(3 * width * (height + 1)); |
---|
[045e2af] | 1332 | if (!pixels) return false; |
---|
| 1333 | glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *)pixels); |
---|
[1bd4841] | 1334 | unsigned char * tmp_row = pixels + 3 * width * height; |
---|
| 1335 | // We need to flip the image vertically - this approach should be more |
---|
| 1336 | // efficient than using wxImage::Mirror(false) as that creates a new |
---|
| 1337 | // wxImage object. |
---|
| 1338 | for (int y = height / 2 - 1; y >= 0; --y) { |
---|
| 1339 | unsigned char * upper = pixels + 3 * width * y; |
---|
| 1340 | unsigned char * lower = pixels + 3 * width * (height - y - 1); |
---|
| 1341 | memcpy(tmp_row, upper, 3 * width); |
---|
| 1342 | memcpy(upper, lower, 3 * width); |
---|
| 1343 | memcpy(lower, tmp_row, 3 * width); |
---|
| 1344 | } |
---|
| 1345 | // NB wxImage constructor calls free(pixels) for us. |
---|
[045e2af] | 1346 | wxImage grab(width, height, pixels); |
---|
[1bd4841] | 1347 | return grab.SaveFile(fnm, type); |
---|
[045e2af] | 1348 | } |
---|