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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6 | // Copyright (C) 2002-2003,2005 Mark R. Shinwell |
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7 | // Copyright (C) 2003,2004,2005,2006,2007 Olly Betts |
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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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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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28 | #include <wx/confbase.h> |
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29 | #include <wx/image.h> |
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30 | |
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31 | #include <algorithm> |
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32 | |
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33 | #include "aven.h" |
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34 | #include "gla.h" |
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35 | #include "message.h" |
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36 | #include "useful.h" |
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37 | |
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38 | #ifdef __APPLE__ |
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39 | #include <OpenGL/glext.h> |
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40 | #else |
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41 | #include <GL/glext.h> |
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42 | #endif |
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43 | |
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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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47 | #ifndef GL_POINT_SPRITE |
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48 | #define GL_POINT_SPRITE 0x8861 |
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49 | #endif |
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50 | #ifndef GL_COORD_REPLACE |
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51 | #define GL_COORD_REPLACE 0x8862 |
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52 | #endif |
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53 | |
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54 | #ifndef USE_FNT |
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55 | // Some WIN32 stupidity which causes mingw to fail to link for some reason; |
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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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58 | #define GLUT_DISABLE_ATEXIT_HACK |
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59 | // For glutBitmapLength() |
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60 | #define GLUT_API_VERSION 4 |
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61 | #ifdef __APPLE__ |
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62 | #include <OpenGL/glut.h> |
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63 | #else |
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64 | #include <GL/glut.h> |
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65 | #endif |
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66 | #ifdef FREEGLUT |
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67 | #include <GL/freeglut_ext.h> |
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68 | #endif |
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69 | #endif |
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70 | |
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71 | using namespace std; |
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72 | |
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73 | const double BLOB_DIAMETER = 5.0; |
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74 | |
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75 | static bool opengl_initialised = false; |
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76 | |
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77 | string GetGLSystemDescription() |
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78 | { |
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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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82 | const char *p = (const char*)glGetString(GL_VERSION); |
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83 | if (!p) |
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84 | return "Couldn't read OpenGL version!"; |
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85 | |
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86 | string info; |
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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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107 | info += string_format("R%dG%dB%d\n" |
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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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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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122 | return info; |
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123 | } |
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124 | |
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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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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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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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135 | } while (0) |
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136 | |
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137 | // |
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138 | // GLAPen |
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139 | // |
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140 | |
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141 | GLAPen::GLAPen() |
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142 | { |
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143 | components[0] = components[1] = components[2] = 0.0; |
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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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152 | components[0] = red; |
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153 | components[1] = green; |
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154 | components[2] = blue; |
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155 | } |
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156 | |
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157 | double GLAPen::GetRed() const |
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158 | { |
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159 | return components[0]; |
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160 | } |
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161 | |
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162 | double GLAPen::GetGreen() const |
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163 | { |
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164 | return components[1]; |
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165 | } |
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166 | |
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167 | double GLAPen::GetBlue() const |
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168 | { |
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169 | return components[2]; |
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170 | } |
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171 | |
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172 | void GLAPen::Interpolate(const GLAPen& pen, double how_far) |
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173 | { |
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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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198 | { 40, 40, 255 }, // blue |
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199 | }; |
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200 | |
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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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214 | // |
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215 | // GLACanvas |
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216 | // |
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217 | |
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218 | #ifndef USE_FNT |
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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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221 | #endif |
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222 | |
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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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225 | : wxGLCanvas(parent, id, wxDefaultPosition, wxDefaultSize, wxWANTS_CHARS), |
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226 | m_Translation() |
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227 | { |
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228 | // Constructor. |
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229 | |
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230 | m_Quadric = NULL; |
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231 | m_Pan = 0.0; |
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232 | m_Tilt = 0.0; |
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233 | m_Scale = 0.0; |
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234 | m_VolumeDiameter = 1.0; |
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235 | m_SmoothShading = false; |
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236 | m_Texture = 0; |
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237 | m_Textured = false; |
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238 | m_Perspective = false; |
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239 | m_Fog = false; |
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240 | m_AntiAlias = false; |
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241 | list_flags = 0; |
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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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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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256 | SetCurrent(); |
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257 | opengl_initialised = true; |
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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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266 | if (m_Quadric) return; |
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267 | // One time initialisation follows. |
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268 | |
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269 | m_Quadric = gluNewQuadric(); |
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270 | CHECK_GL_ERROR("FirstShow", "gluNewQuadric"); |
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271 | if (!m_Quadric) { |
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272 | abort(); // FIXME need to cope somehow |
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273 | } |
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274 | |
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275 | glShadeModel(GL_FLAT); |
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276 | CHECK_GL_ERROR("FirstShow", "glShadeModel"); |
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277 | glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); // So text works. |
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278 | CHECK_GL_ERROR("FirstShow", "glPolygonMode"); |
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279 | //glAlphaFunc(GL_GREATER, 0.5f); |
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280 | //CHECK_GL_ERROR("FirstShow", "glAlphaFunc"); |
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281 | |
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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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285 | CHECK_GL_ERROR("FirstShow", "glFogfv"); |
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286 | |
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287 | // Linear fogging. |
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288 | glFogi(GL_FOG_MODE, GL_LINEAR); |
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289 | CHECK_GL_ERROR("FirstShow", "glFogi"); |
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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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293 | CHECK_GL_ERROR("FirstShow", "glHint"); |
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294 | |
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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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298 | CHECK_GL_ERROR("FirstShow", "glPixelStorei GL_UNPACK_ALIGNMENT"); |
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299 | glPixelStorei(GL_PACK_ALIGNMENT, 1); // For screengrabs and movies. |
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300 | CHECK_GL_ERROR("FirstShow", "glPixelStorei GL_PACK_ALIGNMENT"); |
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301 | |
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302 | #ifdef USE_FNT |
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303 | // Load font |
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304 | wxString path(msg_cfgpth(), wxConvUTF8); |
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305 | path += wxCONFIG_PATH_SEPARATOR; |
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306 | path += wxT("aven.txf"); |
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307 | m_Font.load(path.fn_str()); |
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308 | #endif |
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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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320 | |
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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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324 | // If we have OpenGL >= 2.0 then we definitely have GL_POINT_SPRITE. |
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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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338 | size_t l = 0; |
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339 | if (memcmp(p, "GL_ARB_point_sprite", 19) == 0) { |
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340 | l = 19; |
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341 | } else if (memcmp(p, "GL_NV_point_sprite", 18) == 0) { |
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342 | l = 18; |
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343 | } |
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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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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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356 | } |
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357 | |
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358 | if (glpoint_sprite) { |
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359 | glGenTextures(1, &m_CrossTexture); |
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360 | CHECK_GL_ERROR("FirstShow", "glGenTextures"); |
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361 | glBindTexture(GL_TEXTURE_2D, m_CrossTexture); |
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362 | CHECK_GL_ERROR("FirstShow", "glBindTexture"); |
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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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374 | CHECK_GL_ERROR("FirstShow", "glPixelStorei"); |
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375 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
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376 | CHECK_GL_ERROR("FirstShow", "glTexEnvi"); |
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377 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); |
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378 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_WRAP_S"); |
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379 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); |
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380 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_WRAP_T"); |
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381 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, 8, 8, 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, (GLvoid *)crossteximage); |
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382 | CHECK_GL_ERROR("FirstShow", "glTexImage2D"); |
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383 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
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384 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
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385 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
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386 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
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387 | } |
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388 | //if (glpoint_ok) printf("Using GL_POINTS for blobs\n"); |
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389 | //if (glpoint_sprite) printf("Using GL_POINT_SPRITE* for crosses"); |
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390 | } |
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391 | |
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392 | void GLACanvas::Clear() |
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393 | { |
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394 | // Clear the canvas. |
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395 | |
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396 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
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397 | CHECK_GL_ERROR("Clear", "glClear"); |
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398 | } |
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399 | |
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400 | void GLACanvas::SetScale(Double scale) |
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401 | { |
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402 | if (scale != m_Scale) { |
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403 | vector<GLAList>::iterator i; |
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404 | for (i = drawing_lists.begin(); i != drawing_lists.end(); ++i) { |
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405 | if (*i && i->test_flag(INVALIDATE_ON_SCALE)) i->InvalidateList(); |
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406 | } |
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407 | |
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408 | m_Scale = scale; |
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409 | } |
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410 | } |
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411 | |
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412 | void GLACanvas::AddTranslationScreenCoordinates(int dx, int dy) |
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413 | { |
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414 | // Translate the data by a given amount, specified in screen coordinates. |
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415 | |
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416 | // Find out how far the translation takes us in data coordinates. |
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417 | SetDataTransform(); |
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418 | |
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419 | Double x0, y0, z0; |
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420 | Double x, y, z; |
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421 | gluUnProject(0.0, 0.0, 0.0, modelview_matrix, projection_matrix, viewport, |
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422 | &x0, &y0, &z0); |
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423 | CHECK_GL_ERROR("AddTranslationScreenCoordinates", "gluUnProject"); |
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424 | gluUnProject(dx, -dy, 0.0, modelview_matrix, projection_matrix, viewport, |
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425 | &x, &y, &z); |
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426 | CHECK_GL_ERROR("AddTranslationScreenCoordinates", "gluUnProject (2)"); |
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427 | |
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428 | // Apply the translation. |
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429 | AddTranslation(Vector3(x - x0, y - y0, z - z0)); |
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430 | } |
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431 | |
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432 | void GLACanvas::SetVolumeDiameter(glaCoord diameter) |
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433 | { |
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434 | // Set the size of the data drawing volume by giving the diameter of the |
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435 | // smallest sphere containing it. |
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436 | |
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437 | m_VolumeDiameter = max(1.0, diameter); |
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438 | } |
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439 | |
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440 | void GLACanvas::StartDrawing() |
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441 | { |
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442 | // Prepare for a redraw operation. |
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443 | |
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444 | SetCurrent(); |
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445 | glDepthMask(true); |
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446 | } |
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447 | |
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448 | void GLACanvas::EnableSmoothPolygons(bool filled) |
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449 | { |
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450 | // Prepare for drawing smoothly-shaded polygons. |
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451 | // Only use this when required (in particular lines in lists may not be |
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452 | // coloured correctly when this is enabled). |
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453 | |
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454 | glPushAttrib(GL_ENABLE_BIT|GL_LIGHTING_BIT|GL_POLYGON_BIT); |
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455 | if (filled) { |
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456 | glShadeModel(GL_SMOOTH); |
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457 | glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
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458 | } else { |
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459 | glDisable(GL_LINE_SMOOTH); |
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460 | glDisable(GL_TEXTURE_2D); |
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461 | glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); |
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462 | } |
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463 | CHECK_GL_ERROR("EnableSmoothPolygons", "glPolygonMode"); |
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464 | |
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465 | if (filled && m_SmoothShading) { |
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466 | static const GLfloat mat_specular[] = { 0.2, 0.2, 0.2, 1.0 }; |
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467 | static const GLfloat light_position[] = { -1.0, -1.0, -1.0, 0.0 }; |
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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 | } |
---|
480 | } |
---|
481 | |
---|
482 | void GLACanvas::DisableSmoothPolygons() |
---|
483 | { |
---|
484 | glPopAttrib(); |
---|
485 | } |
---|
486 | |
---|
487 | void GLACanvas::PlaceNormal(const Vector3 &v) |
---|
488 | { |
---|
489 | // Add a normal (for polygons etc.) |
---|
490 | |
---|
491 | glNormal3d(v.GetX(), v.GetY(), v.GetZ()); |
---|
492 | } |
---|
493 | |
---|
494 | void GLACanvas::SetDataTransform() |
---|
495 | { |
---|
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 | |
---|
515 | Double near_plane = 1.0; |
---|
516 | if (m_Perspective) { |
---|
517 | Double lr = near_plane * tan(rad(25.0)); |
---|
518 | Double far_plane = m_VolumeDiameter * 5 + near_plane; // FIXME: work out properly |
---|
519 | Double tb = lr * aspect; |
---|
520 | glFrustum(-lr, lr, -tb, tb, near_plane, far_plane); |
---|
521 | CHECK_GL_ERROR("SetViewportAndProjection", "glFrustum"); |
---|
522 | } else { |
---|
523 | near_plane = 0.0; |
---|
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; |
---|
528 | glOrtho(-lr, lr, -tb, tb, near_plane, far_plane); |
---|
529 | CHECK_GL_ERROR("SetViewportAndProjection", "glOrtho"); |
---|
530 | } |
---|
531 | |
---|
532 | // Set the modelview transform for drawing data. |
---|
533 | glMatrixMode(GL_MODELVIEW); |
---|
534 | CHECK_GL_ERROR("SetDataTransform", "glMatrixMode"); |
---|
535 | glLoadIdentity(); |
---|
536 | CHECK_GL_ERROR("SetDataTransform", "glLoadIdentity"); |
---|
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 | } |
---|
542 | CHECK_GL_ERROR("SetDataTransform", "glTranslated"); |
---|
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"); |
---|
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); |
---|
549 | CHECK_GL_ERROR("SetDataTransform", "CopyToOpenGL"); |
---|
550 | if (m_Perspective) { |
---|
551 | glTranslated(m_Translation.GetX(), |
---|
552 | m_Translation.GetY(), |
---|
553 | m_Translation.GetZ()); |
---|
554 | CHECK_GL_ERROR("SetDataTransform", "glTranslated"); |
---|
555 | } |
---|
556 | |
---|
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. |
---|
566 | glGetDoublev(GL_MODELVIEW_MATRIX, modelview_matrix); |
---|
567 | CHECK_GL_ERROR("SetDataTransform", "glGetDoublev"); |
---|
568 | |
---|
569 | if (!m_Perspective) { |
---|
570 | // Adjust the translation so we don't change the Z position of the model |
---|
571 | Double X, Y, Z; |
---|
572 | gluProject(m_Translation.GetX(), |
---|
573 | m_Translation.GetY(), |
---|
574 | m_Translation.GetZ(), |
---|
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 | } |
---|
584 | |
---|
585 | glEnable(GL_DEPTH_TEST); |
---|
586 | CHECK_GL_ERROR("SetDataTransform", "glEnable GL_DEPTH_TEST"); |
---|
587 | |
---|
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"); |
---|
597 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, |
---|
598 | GL_LINEAR_MIPMAP_LINEAR); |
---|
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 | } |
---|
604 | if (m_Fog) { |
---|
605 | glFogf(GL_FOG_START, near_plane); |
---|
606 | glFogf(GL_FOG_END, near_plane + m_VolumeDiameter); |
---|
607 | glEnable(GL_FOG); |
---|
608 | } else { |
---|
609 | glDisable(GL_FOG); |
---|
610 | } |
---|
611 | |
---|
612 | if (m_AntiAlias) { |
---|
613 | glEnable(GL_LINE_SMOOTH); |
---|
614 | glEnable(GL_BLEND); |
---|
615 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
---|
616 | } else { |
---|
617 | glDisable(GL_LINE_SMOOTH); |
---|
618 | } |
---|
619 | } |
---|
620 | |
---|
621 | void GLACanvas::SetIndicatorTransform() |
---|
622 | { |
---|
623 | list_flags |= NEVER_CACHE; |
---|
624 | |
---|
625 | // Set the modelview transform and projection for drawing indicators. |
---|
626 | wxSize size = GetSize(); |
---|
627 | int window_width = max(size.GetWidth(), 1); |
---|
628 | int window_height = max(size.GetHeight(), 1); |
---|
629 | |
---|
630 | glDisable(GL_DEPTH_TEST); |
---|
631 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_DEPTH_TEST"); |
---|
632 | glDisable(GL_FOG); |
---|
633 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_FOG"); |
---|
634 | |
---|
635 | // Just a simple 2D projection. |
---|
636 | glMatrixMode(GL_PROJECTION); |
---|
637 | CHECK_GL_ERROR("SetIndicatorTransform", "glMatrixMode"); |
---|
638 | glLoadIdentity(); |
---|
639 | CHECK_GL_ERROR("SetIndicatorTransform", "glLoadIdentity (2)"); |
---|
640 | gluOrtho2D(0, window_width, 0, window_height); |
---|
641 | CHECK_GL_ERROR("SetIndicatorTransform", "gluOrtho2D"); |
---|
642 | |
---|
643 | // No modelview transform. |
---|
644 | glMatrixMode(GL_MODELVIEW); |
---|
645 | CHECK_GL_ERROR("SetIndicatorTransform", "glMatrixMode"); |
---|
646 | glLoadIdentity(); |
---|
647 | CHECK_GL_ERROR("SetIndicatorTransform", "glLoadIdentity"); |
---|
648 | |
---|
649 | glDisable(GL_TEXTURE_2D); |
---|
650 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_TEXTURE_2D"); |
---|
651 | glDisable(GL_BLEND); |
---|
652 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_BLEND"); |
---|
653 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); |
---|
654 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_WRAP_S"); |
---|
655 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); |
---|
656 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_WRAP_T"); |
---|
657 | glAlphaFunc(GL_GREATER, 0.5f); |
---|
658 | CHECK_GL_ERROR("SetIndicatorTransform", "glAlphaFunc"); |
---|
659 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
---|
660 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
---|
661 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
---|
662 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
663 | glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST); |
---|
664 | CHECK_GL_ERROR("SetIndicatorTransform", "glHint"); |
---|
665 | } |
---|
666 | |
---|
667 | void GLACanvas::FinishDrawing() |
---|
668 | { |
---|
669 | // Complete a redraw operation. |
---|
670 | |
---|
671 | // glFlush(); |
---|
672 | // CHECK_GL_ERROR("FinishDrawing", "glFlush"); |
---|
673 | SwapBuffers(); |
---|
674 | } |
---|
675 | |
---|
676 | void GLACanvas::DrawList(unsigned int l) |
---|
677 | { |
---|
678 | // FIXME: uncomment to disable use of lists for debugging: |
---|
679 | // GenerateList(l); return; |
---|
680 | if (l >= drawing_lists.size()) drawing_lists.resize(l + 1); |
---|
681 | |
---|
682 | // We generate the OpenGL lists lazily to minimise delays on startup. |
---|
683 | // So check if we need to generate the OpenGL list now. |
---|
684 | if (!drawing_lists[l] && !drawing_lists[l].test_flag(NEVER_CACHE)) { |
---|
685 | // Create a new OpenGL list to hold this sequence of drawing |
---|
686 | // operations. |
---|
687 | GLuint list = glGenLists(1); |
---|
688 | #ifdef GLA_DEBUG |
---|
689 | printf("new list #%d: %d... ", l, list); |
---|
690 | m_Vertices = 0; |
---|
691 | #endif |
---|
692 | CHECK_GL_ERROR("DrawList", "glGenLists"); |
---|
693 | if (list == 0) { |
---|
694 | // If we can't create a list, fall back to just drawing directly. |
---|
695 | GenerateList(l); |
---|
696 | return; |
---|
697 | } |
---|
698 | |
---|
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 | |
---|
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()." |
---|
708 | glNewList(list, GL_COMPILE); |
---|
709 | CHECK_GL_ERROR("DrawList", "glNewList"); |
---|
710 | // Clear list_flags so that we can note what conditions to invalidate |
---|
711 | // the cached OpenGL list on. |
---|
712 | list_flags = 0; |
---|
713 | GenerateList(l); |
---|
714 | glEndList(); |
---|
715 | CHECK_GL_ERROR("DrawList", "glEndList"); |
---|
716 | #ifdef GLA_DEBUG |
---|
717 | printf("done (%d vertices)\n", m_Vertices); |
---|
718 | #endif |
---|
719 | drawing_lists[l] = GLAList(list, list_flags); |
---|
720 | } |
---|
721 | |
---|
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 | } |
---|
729 | } |
---|
730 | |
---|
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 | |
---|
750 | void GLACanvas::InvalidateList(unsigned int l) |
---|
751 | { |
---|
752 | if (l < drawing_lists.size() && drawing_lists[l]) { |
---|
753 | // Delete any existing OpenGL list. |
---|
754 | drawing_lists[l].InvalidateList(); |
---|
755 | } |
---|
756 | } |
---|
757 | |
---|
758 | void GLACanvas::SetBackgroundColour(float red, float green, float blue) |
---|
759 | { |
---|
760 | // Set the background colour of the canvas. |
---|
761 | |
---|
762 | glClearColor(red, green, blue, 1.0); |
---|
763 | CHECK_GL_ERROR("SetBackgroundColour", "glClearColor"); |
---|
764 | } |
---|
765 | |
---|
766 | void GLACanvas::SetColour(const GLAPen& pen, double rgb_scale) |
---|
767 | { |
---|
768 | // Set the colour for subsequent operations. |
---|
769 | glColor3f(pen.GetRed() * rgb_scale, pen.GetGreen() * rgb_scale, |
---|
770 | pen.GetBlue() * rgb_scale); |
---|
771 | } |
---|
772 | |
---|
773 | void GLACanvas::SetColour(const GLAPen& pen) |
---|
774 | { |
---|
775 | // Set the colour for subsequent operations. |
---|
776 | glColor3dv(pen.components); |
---|
777 | } |
---|
778 | |
---|
779 | void GLACanvas::SetColour(gla_colour colour) |
---|
780 | { |
---|
781 | // Set the colour for subsequent operations. |
---|
782 | glColor3ubv(&COLOURS[colour].r); |
---|
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. |
---|
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; |
---|
792 | // Only draw text which is in front of the viewer. |
---|
793 | if (Z > 0) DrawIndicatorText((int)X, (int)Y, str); |
---|
794 | #else |
---|
795 | glRasterPos3d(x, y, z); |
---|
796 | CHECK_GL_ERROR("DrawText", "glRasterPos3d"); |
---|
797 | |
---|
798 | #ifdef FREEGLUT |
---|
799 | glutBitmapString(m_Font, (const unsigned char *)str.c_str()); |
---|
800 | CHECK_GL_ERROR("DrawText", "glutBitmapString"); |
---|
801 | #else |
---|
802 | for (size_t pos = 0; pos < str.length(); pos++) { |
---|
803 | glutBitmapCharacter(m_Font, int((unsigned char)str[pos])); |
---|
804 | CHECK_GL_ERROR("DrawText", "glutBitmapCharacter"); |
---|
805 | } |
---|
806 | #endif |
---|
807 | #endif |
---|
808 | } |
---|
809 | |
---|
810 | void GLACanvas::DrawIndicatorText(int x, int y, const wxString& str) |
---|
811 | { |
---|
812 | #ifdef USE_FNT |
---|
813 | glPushAttrib(GL_ENABLE_BIT); |
---|
814 | glEnable(GL_ALPHA_TEST); |
---|
815 | glEnable(GL_TEXTURE_2D); |
---|
816 | glDisable(GL_DEPTH_TEST); |
---|
817 | m_Font.puts(x, y, str.c_str()); |
---|
818 | glPopAttrib(); |
---|
819 | #else |
---|
820 | DrawText(x, y, 0.0, str); |
---|
821 | #endif |
---|
822 | } |
---|
823 | |
---|
824 | void GLACanvas::GetTextExtent(const wxString& str, int * x_ext, int * y_ext) |
---|
825 | { |
---|
826 | #ifdef USE_FNT |
---|
827 | m_Font.getTextExtent(str.c_str(), x_ext, y_ext); |
---|
828 | #else |
---|
829 | if (x_ext) { |
---|
830 | #if 1 |
---|
831 | *x_ext = glutBitmapLength(m_Font, (const unsigned char *)str.c_str()); |
---|
832 | CHECK_GL_ERROR("GetTextExtent", "glutBitmapLength"); |
---|
833 | #else |
---|
834 | *x_ext = 0; |
---|
835 | for (size_t pos = 0; pos < str.length(); pos++) { |
---|
836 | x_ext += glutBitmapWidth(m_Font, int((unsigned char)str[pos])); |
---|
837 | CHECK_GL_ERROR("GetTextExtent", "glutBitmapWidth"); |
---|
838 | } |
---|
839 | #endif |
---|
840 | } |
---|
841 | if (y_ext) *y_ext = m_FontSize + 2; |
---|
842 | #endif |
---|
843 | } |
---|
844 | |
---|
845 | void GLACanvas::BeginQuadrilaterals() |
---|
846 | { |
---|
847 | // Commence drawing of quadrilaterals. |
---|
848 | |
---|
849 | glBegin(GL_QUADS); |
---|
850 | } |
---|
851 | |
---|
852 | void GLACanvas::EndQuadrilaterals() |
---|
853 | { |
---|
854 | // Finish drawing of quadrilaterals. |
---|
855 | |
---|
856 | glEnd(); |
---|
857 | CHECK_GL_ERROR("EndQuadrilaterals", "glEnd GL_QUADS"); |
---|
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(); |
---|
872 | CHECK_GL_ERROR("EndLines", "glEnd GL_LINES"); |
---|
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(); |
---|
887 | CHECK_GL_ERROR("EndTriangles", "glEnd GL_TRIANGLES"); |
---|
888 | } |
---|
889 | |
---|
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(); |
---|
902 | CHECK_GL_ERROR("EndTriangleStrip", "glEnd GL_TRIANGLE_STRIP"); |
---|
903 | } |
---|
904 | |
---|
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. |
---|
915 | |
---|
916 | glEnd(); |
---|
917 | CHECK_GL_ERROR("EndPolyline", "glEnd GL_LINE_STRIP"); |
---|
918 | } |
---|
919 | |
---|
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. |
---|
930 | |
---|
931 | glEnd(); |
---|
932 | CHECK_GL_ERROR("EndPolygon", "glEnd GL_POLYGON"); |
---|
933 | } |
---|
934 | |
---|
935 | void GLACanvas::PlaceVertex(glaCoord x, glaCoord y, glaCoord z) |
---|
936 | { |
---|
937 | // Place a vertex for the current object being drawn. |
---|
938 | |
---|
939 | #ifdef GLA_DEBUG |
---|
940 | m_Vertices++; |
---|
941 | #endif |
---|
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 | |
---|
949 | PlaceVertex(x, y, 0.0); |
---|
950 | } |
---|
951 | |
---|
952 | void GLACanvas::BeginBlobs() |
---|
953 | { |
---|
954 | if (glpoint_ok) { |
---|
955 | // Commence drawing of a set of blobs. |
---|
956 | glPushAttrib(GL_ENABLE_BIT); |
---|
957 | CHECK_GL_ERROR("BeginBlobs", "glPushAttrib"); |
---|
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 { |
---|
964 | glPushAttrib(GL_TRANSFORM_BIT|GL_VIEWPORT_BIT|GL_ENABLE_BIT); |
---|
965 | CHECK_GL_ERROR("BeginBlobs", "glPushAttrib"); |
---|
966 | SetIndicatorTransform(); |
---|
967 | glEnable(GL_DEPTH_TEST); |
---|
968 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_DEPTH_TEST"); |
---|
969 | } |
---|
970 | } |
---|
971 | |
---|
972 | void GLACanvas::EndBlobs() |
---|
973 | { |
---|
974 | if (glpoint_ok) { |
---|
975 | // Finish drawing of a set of blobs. |
---|
976 | glEnd(); |
---|
977 | CHECK_GL_ERROR("EndBlobs", "GL_POINTS"); |
---|
978 | } |
---|
979 | glPopAttrib(); |
---|
980 | CHECK_GL_ERROR("EndBlobs", "glPopAttrib"); |
---|
981 | } |
---|
982 | |
---|
983 | void GLACanvas::DrawBlob(glaCoord x, glaCoord y, glaCoord z) |
---|
984 | { |
---|
985 | if (glpoint_ok) { |
---|
986 | // Draw a marker. |
---|
987 | PlaceVertex(x, y, z); |
---|
988 | } else { |
---|
989 | Double X, Y, Z; |
---|
990 | if (!Transform(Vector3(x, y, z), &X, &Y, &Z)) { |
---|
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); |
---|
1001 | CHECK_GL_ERROR("DrawBlob", "glTranslated 1"); |
---|
1002 | gluDisk(m_Quadric, 0, BLOB_DIAMETER * 0.5, 8, 1); |
---|
1003 | CHECK_GL_ERROR("DrawBlob", "gluDisk"); |
---|
1004 | glTranslated(-X, -Y, -Z); |
---|
1005 | CHECK_GL_ERROR("DrawBlob", "glTranslated 2"); |
---|
1006 | } |
---|
1007 | #ifdef GLA_DEBUG |
---|
1008 | m_Vertices++; |
---|
1009 | #endif |
---|
1010 | } |
---|
1011 | |
---|
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); |
---|
1021 | CHECK_GL_ERROR("DrawBlob 2", "glTranslated 1"); |
---|
1022 | gluDisk(m_Quadric, 0, BLOB_DIAMETER * 0.5, 8, 1); |
---|
1023 | CHECK_GL_ERROR("DrawBlob 2", "gluDisk"); |
---|
1024 | glTranslated(-x, -y, 0); |
---|
1025 | CHECK_GL_ERROR("DrawBlob 2", "glTranslated 2"); |
---|
1026 | } |
---|
1027 | #ifdef GLA_DEBUG |
---|
1028 | m_Vertices++; |
---|
1029 | #endif |
---|
1030 | } |
---|
1031 | |
---|
1032 | void GLACanvas::BeginCrosses() |
---|
1033 | { |
---|
1034 | // Plot crosses. |
---|
1035 | if (glpoint_sprite) { |
---|
1036 | glPushAttrib(GL_ENABLE_BIT|GL_POINT_BIT); |
---|
1037 | CHECK_GL_ERROR("BeginCrosses", "glPushAttrib"); |
---|
1038 | glBindTexture(GL_TEXTURE_2D, m_CrossTexture); |
---|
1039 | CHECK_GL_ERROR("BeginCrosses", "glBindTexture"); |
---|
1040 | glEnable(GL_ALPHA_TEST); |
---|
1041 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_ALPHA_TEST"); |
---|
1042 | glPointSize(8); |
---|
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"); |
---|
1046 | glEnable(GL_TEXTURE_2D); |
---|
1047 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_TEXTURE_2D"); |
---|
1048 | glEnable(GL_POINT_SPRITE); |
---|
1049 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_POINT_SPRITE"); |
---|
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). |
---|
1056 | glPushAttrib(GL_TRANSFORM_BIT|GL_VIEWPORT_BIT|GL_ENABLE_BIT); |
---|
1057 | CHECK_GL_ERROR("BeginCrosses", "glPushAttrib 2"); |
---|
1058 | SetIndicatorTransform(); |
---|
1059 | glEnable(GL_DEPTH_TEST); |
---|
1060 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_DEPTH_TEST"); |
---|
1061 | glBegin(GL_LINES); |
---|
1062 | } |
---|
1063 | } |
---|
1064 | |
---|
1065 | void GLACanvas::EndCrosses() |
---|
1066 | { |
---|
1067 | glEnd(); |
---|
1068 | if (glpoint_sprite) { |
---|
1069 | CHECK_GL_ERROR("EndCrosses", "glEnd GL_POINTS"); |
---|
1070 | } else { |
---|
1071 | CHECK_GL_ERROR("EndCrosses", "glEnd GL_LINES"); |
---|
1072 | } |
---|
1073 | glPopAttrib(); |
---|
1074 | CHECK_GL_ERROR("EndCrosses", "glPopAttrib"); |
---|
1075 | } |
---|
1076 | |
---|
1077 | void GLACanvas::DrawCross(glaCoord x, glaCoord y, glaCoord z) |
---|
1078 | { |
---|
1079 | if (glpoint_sprite) { |
---|
1080 | PlaceVertex(x, y, z); |
---|
1081 | } else { |
---|
1082 | Double X, Y, Z; |
---|
1083 | if (!Transform(Vector3(x, y, z), &X, &Y, &Z)) { |
---|
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 | } |
---|
1099 | } |
---|
1100 | #ifdef GLA_DEBUG |
---|
1101 | m_Vertices++; |
---|
1102 | #endif |
---|
1103 | } |
---|
1104 | |
---|
1105 | void GLACanvas::DrawRing(glaCoord x, glaCoord y) |
---|
1106 | { |
---|
1107 | // Draw an unfilled circle |
---|
1108 | const Double radius = 4; |
---|
1109 | assert(m_Quadric); |
---|
1110 | glMatrixMode(GL_MODELVIEW); |
---|
1111 | CHECK_GL_ERROR("DrawRing", "glMatrixMode"); |
---|
1112 | glPushMatrix(); |
---|
1113 | CHECK_GL_ERROR("DrawRing", "glPushMatrix"); |
---|
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"); |
---|
1118 | glPopMatrix(); |
---|
1119 | CHECK_GL_ERROR("DrawRing", "glPopMatrix"); |
---|
1120 | } |
---|
1121 | |
---|
1122 | void GLACanvas::DrawRectangle(gla_colour edge, gla_colour fill, |
---|
1123 | glaCoord x0, glaCoord y0, glaCoord w, glaCoord h) |
---|
1124 | { |
---|
1125 | // Draw a filled rectangle with an edge in the indicator plane. |
---|
1126 | // (x0, y0) specify the bottom-left corner of the rectangle and (w, h) the |
---|
1127 | // size. |
---|
1128 | |
---|
1129 | SetColour(fill); |
---|
1130 | BeginQuadrilaterals(); |
---|
1131 | PlaceIndicatorVertex(x0, y0); |
---|
1132 | PlaceIndicatorVertex(x0 + w, y0); |
---|
1133 | PlaceIndicatorVertex(x0 + w, y0 + h); |
---|
1134 | PlaceIndicatorVertex(x0, y0 + h); |
---|
1135 | EndQuadrilaterals(); |
---|
1136 | |
---|
1137 | if (edge != fill) { |
---|
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 | } |
---|
1146 | } |
---|
1147 | |
---|
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 | |
---|
1157 | glShadeModel(GL_SMOOTH); |
---|
1158 | CHECK_GL_ERROR("DrawShadedRectangle", "glShadeModel GL_SMOOTH"); |
---|
1159 | BeginQuadrilaterals(); |
---|
1160 | SetColour(fill_bot); |
---|
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(); |
---|
1167 | glShadeModel(GL_FLAT); |
---|
1168 | CHECK_GL_ERROR("DrawShadedRectangle", "glShadeModel GL_FLAT"); |
---|
1169 | } |
---|
1170 | |
---|
1171 | void GLACanvas::DrawCircle(gla_colour edge, gla_colour fill, |
---|
1172 | glaCoord cx, glaCoord cy, glaCoord radius) |
---|
1173 | { |
---|
1174 | // Draw a filled circle with an edge. |
---|
1175 | SetColour(fill); |
---|
1176 | glMatrixMode(GL_MODELVIEW); |
---|
1177 | CHECK_GL_ERROR("DrawCircle", "glMatrixMode"); |
---|
1178 | glPushMatrix(); |
---|
1179 | CHECK_GL_ERROR("DrawCircle", "glPushMatrix"); |
---|
1180 | glTranslated(cx, cy, 0.0); |
---|
1181 | CHECK_GL_ERROR("DrawCircle", "glTranslated"); |
---|
1182 | assert(m_Quadric); |
---|
1183 | gluDisk(m_Quadric, 0.0, radius, 36, 1); |
---|
1184 | CHECK_GL_ERROR("DrawCircle", "gluDisk"); |
---|
1185 | SetColour(edge); |
---|
1186 | gluDisk(m_Quadric, radius - 1.0, radius, 36, 1); |
---|
1187 | CHECK_GL_ERROR("DrawCircle", "gluDisk (2)"); |
---|
1188 | glPopMatrix(); |
---|
1189 | CHECK_GL_ERROR("DrawCircle", "glPopMatrix"); |
---|
1190 | } |
---|
1191 | |
---|
1192 | void GLACanvas::DrawSemicircle(gla_colour edge, gla_colour fill, |
---|
1193 | glaCoord cx, glaCoord cy, |
---|
1194 | glaCoord radius, glaCoord start) |
---|
1195 | { |
---|
1196 | // Draw a filled semicircle with an edge. |
---|
1197 | // The semicircle extends from "start" deg to "start"+180 deg (increasing |
---|
1198 | // clockwise, 0 deg upwards). |
---|
1199 | SetColour(fill); |
---|
1200 | glMatrixMode(GL_MODELVIEW); |
---|
1201 | CHECK_GL_ERROR("DrawSemicircle", "glMatrixMode"); |
---|
1202 | glPushMatrix(); |
---|
1203 | CHECK_GL_ERROR("DrawSemicircle", "glPushMatrix"); |
---|
1204 | glTranslated(cx, cy, 0.0); |
---|
1205 | CHECK_GL_ERROR("DrawSemicircle", "glTranslated"); |
---|
1206 | assert(m_Quadric); |
---|
1207 | gluPartialDisk(m_Quadric, 0.0, radius, 36, 1, start, 180.0); |
---|
1208 | CHECK_GL_ERROR("DrawSemicircle", "gluPartialDisk"); |
---|
1209 | SetColour(edge); |
---|
1210 | gluPartialDisk(m_Quadric, radius - 1.0, radius, 36, 1, start, 180.0); |
---|
1211 | CHECK_GL_ERROR("DrawSemicircle", "gluPartialDisk (2)"); |
---|
1212 | glPopMatrix(); |
---|
1213 | CHECK_GL_ERROR("DrawSemicircle", "glPopMatrix"); |
---|
1214 | } |
---|
1215 | |
---|
1216 | void |
---|
1217 | GLACanvas::DrawTriangle(gla_colour edge, gla_colour fill, |
---|
1218 | const Vector3 &p0, const Vector3 &p1, const Vector3 &p2) |
---|
1219 | { |
---|
1220 | // Draw a filled triangle with an edge. |
---|
1221 | |
---|
1222 | SetColour(fill); |
---|
1223 | BeginTriangles(); |
---|
1224 | PlaceIndicatorVertex(p0.GetX(), p0.GetY()); |
---|
1225 | PlaceIndicatorVertex(p1.GetX(), p1.GetY()); |
---|
1226 | PlaceIndicatorVertex(p2.GetX(), p2.GetY()); |
---|
1227 | EndTriangles(); |
---|
1228 | |
---|
1229 | SetColour(edge); |
---|
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(); |
---|
1235 | CHECK_GL_ERROR("DrawTriangle", "glEnd GL_LINE_STRIP"); |
---|
1236 | } |
---|
1237 | |
---|
1238 | void GLACanvas::EnableDashedLines() |
---|
1239 | { |
---|
1240 | // Enable dashed lines, and start drawing in them. |
---|
1241 | |
---|
1242 | glLineStipple(1, 0x3333); |
---|
1243 | CHECK_GL_ERROR("EnableDashedLines", "glLineStipple"); |
---|
1244 | glEnable(GL_LINE_STIPPLE); |
---|
1245 | CHECK_GL_ERROR("EnableDashedLines", "glEnable GL_LINE_STIPPLE"); |
---|
1246 | } |
---|
1247 | |
---|
1248 | void GLACanvas::DisableDashedLines() |
---|
1249 | { |
---|
1250 | glDisable(GL_LINE_STIPPLE); |
---|
1251 | CHECK_GL_ERROR("DisableDashedLines", "glDisable GL_LINE_STIPPLE"); |
---|
1252 | } |
---|
1253 | |
---|
1254 | bool GLACanvas::Transform(const Vector3 & v, |
---|
1255 | Double* x_out, Double* y_out, Double* z_out) const |
---|
1256 | { |
---|
1257 | // Convert from data coordinates to screen coordinates. |
---|
1258 | |
---|
1259 | // Perform the projection. |
---|
1260 | return gluProject(v.GetX(), v.GetY(), v.GetZ(), |
---|
1261 | modelview_matrix, projection_matrix, viewport, |
---|
1262 | x_out, y_out, z_out); |
---|
1263 | } |
---|
1264 | |
---|
1265 | void GLACanvas::ReverseTransform(Double x, Double y, |
---|
1266 | Double* x_out, Double* y_out, Double* z_out) const |
---|
1267 | { |
---|
1268 | // Convert from screen coordinates to data coordinates. |
---|
1269 | |
---|
1270 | // Perform the projection. |
---|
1271 | gluUnProject(x, y, 0.0, modelview_matrix, projection_matrix, viewport, |
---|
1272 | x_out, y_out, z_out); |
---|
1273 | CHECK_GL_ERROR("ReverseTransform", "gluUnProject"); |
---|
1274 | } |
---|
1275 | |
---|
1276 | Double GLACanvas::SurveyUnitsAcrossViewport() const |
---|
1277 | { |
---|
1278 | // Measure the current viewport in survey units, taking into account the |
---|
1279 | // current display scale. |
---|
1280 | |
---|
1281 | assert(m_Scale != 0.0); |
---|
1282 | list_flags |= INVALIDATE_ON_SCALE; |
---|
1283 | return m_VolumeDiameter / m_Scale; |
---|
1284 | } |
---|
1285 | |
---|
1286 | void GLACanvas::ToggleSmoothShading() |
---|
1287 | { |
---|
1288 | m_SmoothShading = !m_SmoothShading; |
---|
1289 | } |
---|
1290 | |
---|
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(); |
---|
1302 | |
---|
1303 | wxImage img; |
---|
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)) { |
---|
1310 | // FIXME |
---|
1311 | fprintf(stderr, "Couldn't load image.\n"); |
---|
1312 | exit(1); |
---|
1313 | } |
---|
1314 | |
---|
1315 | // Generate mipmaps. |
---|
1316 | gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGB, // was GL_LUMINANCE |
---|
1317 | img.GetWidth(), img.GetHeight(), |
---|
1318 | GL_RGB, GL_UNSIGNED_BYTE, img.GetData()); |
---|
1319 | CHECK_GL_ERROR("ToggleTextured", "gluBuild2DMipmaps"); |
---|
1320 | |
---|
1321 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
---|
1322 | CHECK_GL_ERROR("ToggleTextured", "glTexEnvi"); |
---|
1323 | } |
---|
1324 | } |
---|
1325 | |
---|
1326 | bool GLACanvas::SaveScreenshot(const wxString & fnm, int type) const |
---|
1327 | { |
---|
1328 | int width; |
---|
1329 | int height; |
---|
1330 | GetSize(&width, &height); |
---|
1331 | unsigned char *pixels = (unsigned char *)malloc(3 * width * (height + 1)); |
---|
1332 | if (!pixels) return false; |
---|
1333 | glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *)pixels); |
---|
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. |
---|
1346 | wxImage grab(width, height, pixels); |
---|
1347 | return grab.SaveFile(fnm, type); |
---|
1348 | } |
---|