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) 2003,2004,2005,2006,2007,2010,2011,2012,2013,2014,2015,2017,2018 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 "gllogerror.h" |
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36 | #include "message.h" |
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37 | #include "useful.h" |
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38 | |
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39 | #ifdef HAVE_GL_GL_H |
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40 | # include <GL/gl.h> |
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41 | #elif defined HAVE_OPENGL_GL_H |
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42 | # include <OpenGL/gl.h> |
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43 | #endif |
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44 | |
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45 | #ifdef HAVE_GL_GLEXT_H |
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46 | # include <GL/glext.h> |
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47 | #elif defined HAVE_OPENGL_GLEXT_H |
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48 | # include <OpenGL/glext.h> |
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49 | #endif |
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50 | |
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51 | #ifndef GL_POINT_SIZE_MAX |
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52 | #define GL_POINT_SIZE_MAX 0x8127 |
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53 | #endif |
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54 | #ifndef GL_POINT_SPRITE |
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55 | #define GL_POINT_SPRITE 0x8861 |
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56 | #endif |
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57 | #ifndef GL_COORD_REPLACE |
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58 | #define GL_COORD_REPLACE 0x8862 |
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59 | #endif |
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60 | // GL_POINT_SIZE_RANGE is deprecated in OpenGL 1.2 and later, and replaced by |
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61 | // GL_SMOOTH_POINT_SIZE_RANGE. |
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62 | #ifndef GL_SMOOTH_POINT_SIZE_RANGE |
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63 | #define GL_SMOOTH_POINT_SIZE_RANGE GL_POINT_SIZE_RANGE |
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64 | #endif |
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65 | // GL_POINT_SIZE_GRANULARITY is deprecated in OpenGL 1.2 and later, and |
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66 | // replaced by GL_SMOOTH_POINT_SIZE_GRANULARITY. |
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67 | #ifndef GL_SMOOTH_POINT_SIZE_GRANULARITY |
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68 | #define GL_SMOOTH_POINT_SIZE_GRANULARITY GL_POINT_SIZE_GRANULARITY |
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69 | #endif |
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70 | // GL_ALIASED_POINT_SIZE_RANGE was added in OpenGL 1.2. |
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71 | #ifndef GL_ALIASED_POINT_SIZE_RANGE |
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72 | #define GL_ALIASED_POINT_SIZE_RANGE 0x846D |
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73 | #endif |
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74 | |
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75 | using namespace std; |
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76 | |
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77 | const int BLOB_DIAMETER = 5; |
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78 | |
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79 | #define BLOB_TEXTURE \ |
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80 | o, o, o, o, o, o, o, o,\ |
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81 | o, o, o, o, o, o, o, o,\ |
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82 | o, o, I, I, I, o, o, o,\ |
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83 | o, I, I, I, I, I, o, o,\ |
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84 | o, I, I, I, I, I, o, o,\ |
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85 | o, I, I, I, I, I, o, o,\ |
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86 | o, o, I, I, I, o, o, o,\ |
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87 | o, o, o, o, o, o, o, o |
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88 | |
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89 | #define CROSS_TEXTURE \ |
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90 | o, o, o, o, o, o, o, o,\ |
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91 | I, o, o, o, o, o, I, o,\ |
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92 | o, I, o, o, o, I, o, o,\ |
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93 | o, o, I, o, I, o, o, o,\ |
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94 | o, o, o, I, o, o, o, o,\ |
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95 | o, o, I, o, I, o, o, o,\ |
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96 | o, I, o, o, o, I, o, o,\ |
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97 | I, o, o, o, o, o, I, o |
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98 | |
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99 | // Declared in gllogerror.h. |
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100 | bool opengl_initialised = false; |
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101 | |
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102 | static bool double_buffered = false; |
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103 | |
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104 | static const int* wx_gl_attribs = NULL; |
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105 | |
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106 | bool |
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107 | GLACanvas::check_visual() |
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108 | { |
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109 | static const int wx_gl_attribs_full[] = { |
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110 | WX_GL_DOUBLEBUFFER, |
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111 | WX_GL_RGBA, |
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112 | WX_GL_DEPTH_SIZE, 16, |
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113 | 0 |
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114 | }; |
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115 | |
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116 | // Use a double-buffered visual if available, as it will give much smoother |
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117 | // animation. |
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118 | double_buffered = true; |
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119 | wx_gl_attribs = wx_gl_attribs_full; |
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120 | if (!IsDisplaySupported(wx_gl_attribs)) { |
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121 | ++wx_gl_attribs; |
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122 | if (!IsDisplaySupported(wx_gl_attribs)) { |
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123 | return false; |
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124 | } |
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125 | double_buffered = false; |
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126 | } |
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127 | return true; |
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128 | } |
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129 | |
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130 | string GetGLSystemDescription() |
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131 | { |
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132 | // If OpenGL isn't initialised we may get a SEGV from glGetString. |
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133 | if (!opengl_initialised) |
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134 | return "No OpenGL information available yet - try opening a file."; |
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135 | const char *p = (const char*)glGetString(GL_VERSION); |
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136 | if (!p) |
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137 | return "Couldn't read OpenGL version!"; |
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138 | |
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139 | string info; |
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140 | info += "OpenGL "; |
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141 | info += p; |
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142 | info += '\n'; |
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143 | info += (const char*)glGetString(GL_VENDOR); |
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144 | info += '\n'; |
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145 | info += (const char*)glGetString(GL_RENDERER); |
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146 | #if defined __WXGTK__ || defined __WXX11__ || defined __WXMOTIF__ |
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147 | info += string_format("\nGLX %0.1f\n", wxGLCanvas::GetGLXVersion() * 0.1); |
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148 | #else |
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149 | info += '\n'; |
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150 | #endif |
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151 | |
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152 | GLint red, green, blue; |
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153 | glGetIntegerv(GL_RED_BITS, &red); |
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154 | glGetIntegerv(GL_GREEN_BITS, &green); |
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155 | glGetIntegerv(GL_BLUE_BITS, &blue); |
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156 | GLint max_texture_size; |
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157 | glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size); |
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158 | GLint max_viewport[2]; |
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159 | glGetIntegerv(GL_MAX_VIEWPORT_DIMS, max_viewport); |
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160 | GLdouble point_size_range[2]; |
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161 | glGetDoublev(GL_SMOOTH_POINT_SIZE_RANGE, point_size_range); |
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162 | GLdouble point_size_granularity; |
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163 | glGetDoublev(GL_SMOOTH_POINT_SIZE_GRANULARITY, &point_size_granularity); |
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164 | info += string_format("R%dG%dB%d\n" |
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165 | "Max Texture size: %dx%d\n" |
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166 | "Max Viewport size: %dx%d\n" |
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167 | "Smooth Point Size %.3f-%.3f (granularity %.3f)", |
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168 | (int)red, (int)green, (int)blue, |
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169 | (int)max_texture_size, (int)max_texture_size, |
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170 | (int)max_viewport[0], (int)max_viewport[1], |
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171 | point_size_range[0], point_size_range[1], |
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172 | point_size_granularity); |
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173 | glGetDoublev(GL_ALIASED_POINT_SIZE_RANGE, point_size_range); |
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174 | if (glGetError() != GL_INVALID_ENUM) { |
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175 | info += string_format("\nAliased point size %.3f-%.3f", |
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176 | point_size_range[0], point_size_range[1]); |
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177 | } |
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178 | |
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179 | info += "\nDouble buffered: "; |
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180 | if (double_buffered) |
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181 | info += "true"; |
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182 | else |
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183 | info += "false"; |
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184 | |
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185 | const GLubyte* gl_extensions = glGetString(GL_EXTENSIONS); |
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186 | if (*gl_extensions) { |
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187 | info += '\n'; |
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188 | info += (const char*)gl_extensions; |
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189 | } |
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190 | return info; |
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191 | } |
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192 | |
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193 | static bool |
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194 | glpoint_sprite_works() |
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195 | { |
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196 | // Point sprites provide an easy, fast way for us to draw crosses by |
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197 | // texture mapping GL points. |
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198 | // |
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199 | // If we have OpenGL >= 2.0 then we definitely have GL_POINT_SPRITE. |
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200 | // Otherwise see if we have the GL_ARB_point_sprite or GL_NV_point_sprite |
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201 | // extensions. |
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202 | // |
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203 | // The symbolic constants GL_POINT_SPRITE, GL_POINT_SPRITE_ARB, and |
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204 | // GL_POINT_SPRITE_NV all give the same number so it doesn't matter |
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205 | // which we use. |
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206 | static bool glpoint_sprite = false; |
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207 | static bool checked = false; |
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208 | if (!checked) { |
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209 | float maxSize = 0.0f; |
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210 | glGetFloatv(GL_POINT_SIZE_MAX, &maxSize); |
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211 | if (maxSize >= 8) { |
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212 | glpoint_sprite = (atoi((const char *)glGetString(GL_VERSION)) >= 2); |
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213 | if (!glpoint_sprite) { |
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214 | const char * p = (const char *)glGetString(GL_EXTENSIONS); |
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215 | while (true) { |
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216 | size_t l = 0; |
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217 | if (memcmp(p, "GL_ARB_point_sprite", 19) == 0) { |
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218 | l = 19; |
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219 | } else if (memcmp(p, "GL_NV_point_sprite", 18) == 0) { |
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220 | l = 18; |
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221 | } |
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222 | if (l) { |
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223 | p += l; |
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224 | if (*p == '\0' || *p == ' ') { |
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225 | glpoint_sprite = true; |
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226 | break; |
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227 | } |
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228 | } |
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229 | p = strchr(p + 1, ' '); |
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230 | if (!p) break; |
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231 | ++p; |
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232 | } |
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233 | } |
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234 | } |
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235 | checked = true; |
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236 | } |
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237 | return glpoint_sprite; |
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238 | } |
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239 | |
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240 | void |
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241 | log_gl_error(const wxChar * str, GLenum error_code) |
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242 | { |
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243 | wxString msg; |
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244 | switch (error_code) { |
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245 | case GL_INVALID_ENUM: |
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246 | msg = "Invalid OpenGL enumerated value"; |
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247 | break; |
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248 | case GL_INVALID_VALUE: |
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249 | msg = "Invalid OpenGL numeric argument value"; |
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250 | break; |
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251 | case GL_INVALID_OPERATION: |
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252 | msg = "Invalid OpenGL operation"; |
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253 | break; |
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254 | case GL_INVALID_FRAMEBUFFER_OPERATION: |
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255 | msg = "Invalid OpenGL framebuffer operation"; |
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256 | break; |
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257 | case GL_OUT_OF_MEMORY: |
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258 | msg = wmsg(/*Out of memory*/389); |
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259 | break; |
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260 | case GL_STACK_UNDERFLOW: |
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261 | msg = "OpenGL stack underflow"; |
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262 | break; |
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263 | case GL_STACK_OVERFLOW: |
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264 | msg = "OpenGL stack overflow"; |
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265 | break; |
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266 | default: |
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267 | msg.Format("Unknown OpenGL error code: %d", int(error_code)); |
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268 | break; |
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269 | } |
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270 | wxLogError(str, msg); |
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271 | } |
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272 | |
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273 | // |
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274 | // GLAPen |
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275 | // |
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276 | |
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277 | GLAPen::GLAPen() |
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278 | { |
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279 | components[0] = components[1] = components[2] = 0.0; |
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280 | } |
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281 | |
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282 | void GLAPen::SetColour(double red, double green, double blue) |
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283 | { |
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284 | components[0] = red; |
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285 | components[1] = green; |
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286 | components[2] = blue; |
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287 | } |
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288 | |
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289 | double GLAPen::GetRed() const |
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290 | { |
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291 | return components[0]; |
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292 | } |
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293 | |
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294 | double GLAPen::GetGreen() const |
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295 | { |
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296 | return components[1]; |
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297 | } |
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298 | |
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299 | double GLAPen::GetBlue() const |
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300 | { |
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301 | return components[2]; |
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302 | } |
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303 | |
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304 | void GLAPen::Interpolate(const GLAPen& pen, double how_far) |
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305 | { |
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306 | components[0] += how_far * (pen.GetRed() - components[0]); |
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307 | components[1] += how_far * (pen.GetGreen() - components[1]); |
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308 | components[2] += how_far * (pen.GetBlue() - components[2]); |
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309 | } |
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310 | |
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311 | struct ColourTriple { |
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312 | // RGB triple: values are from 0-255 inclusive for each component. |
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313 | unsigned char r, g, b; |
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314 | }; |
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315 | |
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316 | // These must be in the same order as the entries in COLOURS[] below. |
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317 | const ColourTriple COLOURS[] = { |
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318 | { 0, 0, 0 }, // black |
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319 | { 100, 100, 100 }, // grey |
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320 | { 180, 180, 180 }, // light grey |
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321 | { 140, 140, 140 }, // light grey 2 |
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322 | { 90, 90, 90 }, // dark grey |
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323 | { 255, 255, 255 }, // white |
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324 | { 0, 100, 255}, // turquoise |
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325 | { 0, 255, 40 }, // green |
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326 | { 150, 205, 224 }, // indicator 1 |
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327 | { 114, 149, 160 }, // indicator 2 |
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328 | { 255, 255, 0 }, // yellow |
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329 | { 255, 0, 0 }, // red |
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330 | { 40, 40, 255 }, // blue |
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331 | }; |
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332 | |
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333 | bool GLAList::need_to_generate() { |
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334 | // Bail out if the list is already cached, or can't usefully be cached. |
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335 | if (flags & (GLACanvas::CACHED|GLACanvas::NEVER_CACHE)) |
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336 | return false; |
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337 | |
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338 | // Create a new OpenGL list to hold this sequence of drawing |
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339 | // operations. |
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340 | if (gl_list == 0) { |
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341 | gl_list = glGenLists(1); |
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342 | CHECK_GL_ERROR("GLAList::need_to_generate", "glGenLists"); |
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343 | #ifdef GLA_DEBUG |
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344 | printf("glGenLists(1) returned %u\n", (unsigned)gl_list); |
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345 | #endif |
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346 | if (gl_list == 0) { |
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347 | // If we can't create a list for any reason, fall back to just |
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348 | // drawing directly, and flag the list as NEVER_CACHE as there's |
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349 | // unlikely to be much point calling glGenLists() again. |
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350 | flags = GLACanvas::NEVER_CACHE; |
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351 | return false; |
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352 | } |
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353 | |
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354 | // We should have 256 lists for font drawing and a dozen or so for 2D |
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355 | // and 3D lists. So something is amiss if we've generated 1000 lists, |
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356 | // probably a infinite loop in the lazy list mechanism. |
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357 | assert(gl_list < 1000); |
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358 | } |
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359 | // https://www.opengl.org/resources/faq/technical/displaylist.htm advises: |
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360 | // |
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361 | // "Stay away from GL_COMPILE_AND_EXECUTE mode. Instead, create the |
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362 | // list using GL_COMPILE mode, then execute it with glCallList()." |
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363 | glNewList(gl_list, GL_COMPILE); |
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364 | CHECK_GL_ERROR("GLAList::need_to_generate", "glNewList"); |
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365 | return true; |
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366 | } |
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367 | |
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368 | void GLAList::finalise(unsigned int list_flags) |
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369 | { |
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370 | glEndList(); |
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371 | CHECK_GL_ERROR("GLAList::finalise", "glEndList"); |
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372 | if (list_flags & GLACanvas::NEVER_CACHE) { |
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373 | glDeleteLists(gl_list, 1); |
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374 | CHECK_GL_ERROR("GLAList::finalise", "glDeleteLists"); |
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375 | gl_list = 0; |
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376 | flags = GLACanvas::NEVER_CACHE; |
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377 | } else { |
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378 | flags = list_flags | GLACanvas::CACHED; |
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379 | } |
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380 | } |
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381 | |
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382 | bool GLAList::DrawList() const { |
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383 | if ((flags & GLACanvas::CACHED) == 0) |
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384 | return false; |
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385 | glCallList(gl_list); |
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386 | CHECK_GL_ERROR("GLAList::DrawList", "glCallList"); |
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387 | return true; |
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388 | } |
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389 | |
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390 | // |
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391 | // GLACanvas |
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392 | // |
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393 | |
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394 | BEGIN_EVENT_TABLE(GLACanvas, wxGLCanvas) |
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395 | EVT_SIZE(GLACanvas::OnSize) |
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396 | END_EVENT_TABLE() |
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397 | |
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398 | // Pass wxWANTS_CHARS so that the window gets cursor keys on MS Windows. |
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399 | GLACanvas::GLACanvas(wxWindow* parent, int id) |
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400 | : wxGLCanvas(parent, id, wx_gl_attribs, wxDefaultPosition, |
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401 | wxDefaultSize, wxWANTS_CHARS), |
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402 | ctx(this), m_Translation(), blob_method(UNKNOWN), cross_method(UNKNOWN), |
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403 | x_size(0), y_size(0) |
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404 | { |
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405 | // Constructor. |
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406 | |
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407 | m_Quadric = NULL; |
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408 | m_Pan = 0.0; |
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409 | m_Tilt = 0.0; |
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410 | m_Scale = 0.0; |
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411 | m_VolumeDiameter = 1.0; |
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412 | m_SmoothShading = false; |
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413 | m_Texture = 0; |
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414 | m_Textured = false; |
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415 | m_Perspective = false; |
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416 | m_Fog = false; |
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417 | m_AntiAlias = false; |
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418 | list_flags = 0; |
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419 | alpha = 1.0; |
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420 | } |
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421 | |
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422 | GLACanvas::~GLACanvas() |
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423 | { |
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424 | // Destructor. |
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425 | |
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426 | if (m_Quadric) { |
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427 | gluDeleteQuadric(m_Quadric); |
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428 | CHECK_GL_ERROR("~GLACanvas", "gluDeleteQuadric"); |
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429 | } |
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430 | } |
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431 | |
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432 | void GLACanvas::FirstShow() |
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433 | { |
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434 | // Update our record of the client area size and centre. |
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435 | GetClientSize(&x_size, &y_size); |
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436 | if (x_size < 1) x_size = 1; |
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437 | if (y_size < 1) y_size = 1; |
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438 | |
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439 | ctx.SetCurrent(*this); |
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440 | opengl_initialised = true; |
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441 | |
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442 | // Set the background colour of the canvas to black. |
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443 | glClearColor(0.0, 0.0, 0.0, 1.0); |
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444 | CHECK_GL_ERROR("FirstShow", "glClearColor"); |
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445 | |
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446 | // Set viewport. |
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447 | glViewport(0, 0, x_size, y_size); |
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448 | CHECK_GL_ERROR("FirstShow", "glViewport"); |
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449 | |
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450 | save_hints = false; |
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451 | |
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452 | vendor = wxString((const char *)glGetString(GL_VENDOR), wxConvUTF8); |
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453 | renderer = wxString((const char *)glGetString(GL_RENDERER), wxConvUTF8); |
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454 | { |
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455 | wxConfigBase * cfg = wxConfigBase::Get(); |
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456 | wxString s; |
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457 | if (cfg->Read(wxT("opengl_survex"), &s, wxString()) && s == wxT(VERSION) && |
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458 | cfg->Read(wxT("opengl_vendor"), &s, wxString()) && s == vendor && |
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459 | cfg->Read(wxT("opengl_renderer"), &s, wxString()) && s == renderer) { |
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460 | // The survex version, vendor and renderer are the same as those |
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461 | // we cached hints for, so use those hints. |
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462 | int v; |
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463 | if (cfg->Read(wxT("blob_method"), &v, 0) && |
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464 | (v == SPRITE || v == POINT || v == LINES)) { |
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465 | // How to draw blobs. |
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466 | blob_method = v; |
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467 | } |
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468 | if (cfg->Read(wxT("cross_method"), &v, 0) && |
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469 | (v == SPRITE || v == LINES)) { |
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470 | // How to draw crosses. |
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471 | cross_method = v; |
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472 | } |
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473 | } |
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474 | } |
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475 | |
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476 | if (m_Quadric) return; |
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477 | // One time initialisation follows. |
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478 | |
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479 | m_Quadric = gluNewQuadric(); |
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480 | CHECK_GL_ERROR("FirstShow", "gluNewQuadric"); |
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481 | if (!m_Quadric) { |
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482 | abort(); // FIXME need to cope somehow |
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483 | } |
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484 | |
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485 | glShadeModel(GL_FLAT); |
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486 | CHECK_GL_ERROR("FirstShow", "glShadeModel"); |
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487 | glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); // So text works. |
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488 | CHECK_GL_ERROR("FirstShow", "glPolygonMode"); |
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489 | //glAlphaFunc(GL_GREATER, 0.5f); |
---|
490 | //CHECK_GL_ERROR("FirstShow", "glAlphaFunc"); |
---|
491 | |
---|
492 | // We want glReadPixels() to read from the front buffer (which is the |
---|
493 | // default for single-buffered displays). |
---|
494 | if (double_buffered) { |
---|
495 | glReadBuffer(GL_FRONT); |
---|
496 | CHECK_GL_ERROR("FirstShow", "glReadBuffer"); |
---|
497 | } |
---|
498 | |
---|
499 | // Grey fog effect. |
---|
500 | GLfloat fogcolour[4] = { 0.5, 0.5, 0.5, 1.0 }; |
---|
501 | glFogfv(GL_FOG_COLOR, fogcolour); |
---|
502 | CHECK_GL_ERROR("FirstShow", "glFogfv"); |
---|
503 | |
---|
504 | // Linear fogging. |
---|
505 | glFogi(GL_FOG_MODE, GL_LINEAR); |
---|
506 | CHECK_GL_ERROR("FirstShow", "glFogi"); |
---|
507 | |
---|
508 | // Optimise for speed (compute fog per vertex). |
---|
509 | glHint(GL_FOG_HINT, GL_FASTEST); |
---|
510 | CHECK_GL_ERROR("FirstShow", "glHint"); |
---|
511 | |
---|
512 | // No padding on pixel packing and unpacking (default is to pad each |
---|
513 | // line to a multiple of 4 bytes). |
---|
514 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // For setting texture maps. |
---|
515 | CHECK_GL_ERROR("FirstShow", "glPixelStorei GL_UNPACK_ALIGNMENT"); |
---|
516 | glPixelStorei(GL_PACK_ALIGNMENT, 1); // For screengrabs and movies. |
---|
517 | CHECK_GL_ERROR("FirstShow", "glPixelStorei GL_PACK_ALIGNMENT"); |
---|
518 | |
---|
519 | // Load font |
---|
520 | wxString path = wmsg_cfgpth(); |
---|
521 | path += wxCONFIG_PATH_SEPARATOR; |
---|
522 | path += wxT("unifont.pixelfont"); |
---|
523 | if (!m_Font.load(path)) { |
---|
524 | // FIXME: do something better. |
---|
525 | // We have this message available: Error in format of font file “%s” |
---|
526 | fprintf(stderr, "Failed to parse compiled-in font data\n"); |
---|
527 | exit(1); |
---|
528 | } |
---|
529 | |
---|
530 | if (blob_method == UNKNOWN) { |
---|
531 | // Check if we can use GL_POINTS to plot blobs at stations. |
---|
532 | GLdouble point_size_range[2]; |
---|
533 | glGetDoublev(GL_SMOOTH_POINT_SIZE_RANGE, point_size_range); |
---|
534 | CHECK_GL_ERROR("FirstShow", "glGetDoublev GL_SMOOTH_POINT_SIZE_RANGE"); |
---|
535 | if (point_size_range[0] <= BLOB_DIAMETER && |
---|
536 | point_size_range[1] >= BLOB_DIAMETER) { |
---|
537 | blob_method = POINT; |
---|
538 | } else { |
---|
539 | blob_method = glpoint_sprite_works() ? SPRITE : LINES; |
---|
540 | } |
---|
541 | save_hints = true; |
---|
542 | } |
---|
543 | |
---|
544 | if (blob_method == POINT) { |
---|
545 | glPointSize(BLOB_DIAMETER); |
---|
546 | CHECK_GL_ERROR("FirstShow", "glPointSize"); |
---|
547 | } |
---|
548 | |
---|
549 | if (cross_method == UNKNOWN) { |
---|
550 | cross_method = glpoint_sprite_works() ? SPRITE : LINES; |
---|
551 | save_hints = true; |
---|
552 | } |
---|
553 | |
---|
554 | if (cross_method == SPRITE) { |
---|
555 | glGenTextures(1, &m_CrossTexture); |
---|
556 | CHECK_GL_ERROR("FirstShow", "glGenTextures"); |
---|
557 | glBindTexture(GL_TEXTURE_2D, m_CrossTexture); |
---|
558 | CHECK_GL_ERROR("FirstShow", "glBindTexture"); |
---|
559 | // Cross image for drawing crosses using texture mapped point sprites. |
---|
560 | const unsigned char crossteximage[128] = { |
---|
561 | #define o 0,0 |
---|
562 | #define I 255,255 |
---|
563 | CROSS_TEXTURE |
---|
564 | #undef o |
---|
565 | #undef I |
---|
566 | }; |
---|
567 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
---|
568 | CHECK_GL_ERROR("FirstShow", "glPixelStorei"); |
---|
569 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
---|
570 | CHECK_GL_ERROR("FirstShow", "glTexEnvi"); |
---|
571 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); |
---|
572 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_WRAP_S"); |
---|
573 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); |
---|
574 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_WRAP_T"); |
---|
575 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, 8, 8, 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, (GLvoid *)crossteximage); |
---|
576 | CHECK_GL_ERROR("FirstShow", "glTexImage2D"); |
---|
577 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
---|
578 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
---|
579 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
---|
580 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
581 | } |
---|
582 | |
---|
583 | if (blob_method == SPRITE) { |
---|
584 | glGenTextures(1, &m_BlobTexture); |
---|
585 | CHECK_GL_ERROR("FirstShow", "glGenTextures"); |
---|
586 | glBindTexture(GL_TEXTURE_2D, m_BlobTexture); |
---|
587 | CHECK_GL_ERROR("FirstShow", "glBindTexture"); |
---|
588 | // Image for drawing blobs using texture mapped point sprites. |
---|
589 | const unsigned char blobteximage[128] = { |
---|
590 | #define o 0,0 |
---|
591 | #define I 255,255 |
---|
592 | BLOB_TEXTURE |
---|
593 | #undef o |
---|
594 | #undef I |
---|
595 | }; |
---|
596 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
---|
597 | CHECK_GL_ERROR("FirstShow", "glPixelStorei"); |
---|
598 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
---|
599 | CHECK_GL_ERROR("FirstShow", "glTexEnvi"); |
---|
600 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); |
---|
601 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_WRAP_S"); |
---|
602 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); |
---|
603 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_WRAP_T"); |
---|
604 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, 8, 8, 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, (GLvoid *)blobteximage); |
---|
605 | CHECK_GL_ERROR("FirstShow", "glTexImage2D"); |
---|
606 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
---|
607 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
---|
608 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
---|
609 | CHECK_GL_ERROR("FirstShow", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
610 | } |
---|
611 | } |
---|
612 | |
---|
613 | void GLACanvas::Clear() |
---|
614 | { |
---|
615 | // Clear the canvas. |
---|
616 | |
---|
617 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
---|
618 | CHECK_GL_ERROR("Clear", "glClear"); |
---|
619 | } |
---|
620 | |
---|
621 | void GLACanvas::SetScale(Double scale) |
---|
622 | { |
---|
623 | if (scale != m_Scale) { |
---|
624 | vector<GLAList>::iterator i; |
---|
625 | for (i = drawing_lists.begin(); i != drawing_lists.end(); ++i) { |
---|
626 | i->invalidate_if(INVALIDATE_ON_SCALE); |
---|
627 | } |
---|
628 | |
---|
629 | m_Scale = scale; |
---|
630 | } |
---|
631 | } |
---|
632 | |
---|
633 | void GLACanvas::OnSize(wxSizeEvent & event) |
---|
634 | { |
---|
635 | wxSize size = event.GetSize(); |
---|
636 | |
---|
637 | unsigned int mask = 0; |
---|
638 | if (size.GetWidth() != x_size) mask |= INVALIDATE_ON_X_RESIZE; |
---|
639 | if (size.GetHeight() != y_size) mask |= INVALIDATE_ON_Y_RESIZE; |
---|
640 | if (mask) { |
---|
641 | vector<GLAList>::iterator i; |
---|
642 | for (i = drawing_lists.begin(); i != drawing_lists.end(); ++i) { |
---|
643 | i->invalidate_if(mask); |
---|
644 | } |
---|
645 | |
---|
646 | // The width and height go to zero when the panel is dragged right |
---|
647 | // across so we clamp them to be at least 1 to avoid problems. |
---|
648 | x_size = size.GetWidth(); |
---|
649 | y_size = size.GetHeight(); |
---|
650 | if (x_size < 1) x_size = 1; |
---|
651 | if (y_size < 1) y_size = 1; |
---|
652 | } |
---|
653 | |
---|
654 | event.Skip(); |
---|
655 | |
---|
656 | if (!opengl_initialised) return; |
---|
657 | |
---|
658 | // Set viewport. |
---|
659 | glViewport(0, 0, x_size, y_size); |
---|
660 | CHECK_GL_ERROR("OnSize", "glViewport"); |
---|
661 | } |
---|
662 | |
---|
663 | void GLACanvas::AddTranslationScreenCoordinates(int dx, int dy) |
---|
664 | { |
---|
665 | // Translate the data by a given amount, specified in screen coordinates. |
---|
666 | |
---|
667 | // Find out how far the translation takes us in data coordinates. |
---|
668 | SetDataTransform(); |
---|
669 | |
---|
670 | double x0, y0, z0; |
---|
671 | double x, y, z; |
---|
672 | gluUnProject(0.0, 0.0, 0.0, modelview_matrix, projection_matrix, viewport, |
---|
673 | &x0, &y0, &z0); |
---|
674 | CHECK_GL_ERROR("AddTranslationScreenCoordinates", "gluUnProject"); |
---|
675 | gluUnProject(dx, -dy, 0.0, modelview_matrix, projection_matrix, viewport, |
---|
676 | &x, &y, &z); |
---|
677 | CHECK_GL_ERROR("AddTranslationScreenCoordinates", "gluUnProject (2)"); |
---|
678 | |
---|
679 | // Apply the translation. |
---|
680 | AddTranslation(Vector3(x - x0, y - y0, z - z0)); |
---|
681 | } |
---|
682 | |
---|
683 | void GLACanvas::SetVolumeDiameter(glaCoord diameter) |
---|
684 | { |
---|
685 | // Set the size of the data drawing volume by giving the diameter of the |
---|
686 | // smallest sphere containing it. |
---|
687 | |
---|
688 | m_VolumeDiameter = max(glaCoord(1.0), diameter); |
---|
689 | } |
---|
690 | |
---|
691 | void GLACanvas::StartDrawing() |
---|
692 | { |
---|
693 | // Prepare for a redraw operation. |
---|
694 | |
---|
695 | ctx.SetCurrent(*this); |
---|
696 | glDepthMask(GL_TRUE); |
---|
697 | |
---|
698 | if (!save_hints) return; |
---|
699 | |
---|
700 | // We want to check on the second redraw. |
---|
701 | static int draw_count = 2; |
---|
702 | if (--draw_count != 0) return; |
---|
703 | |
---|
704 | if (cross_method != LINES) { |
---|
705 | SetColour(col_WHITE); |
---|
706 | Clear(); |
---|
707 | SetDataTransform(); |
---|
708 | BeginCrosses(); |
---|
709 | DrawCross(-m_Translation.GetX(), -m_Translation.GetY(), -m_Translation.GetZ()); |
---|
710 | EndCrosses(); |
---|
711 | static const unsigned char expected_cross[64 * 3] = { |
---|
712 | #define o 0,0,0 |
---|
713 | #define I 255,255,255 |
---|
714 | CROSS_TEXTURE |
---|
715 | #undef o |
---|
716 | #undef I |
---|
717 | }; |
---|
718 | if (!CheckVisualFidelity(expected_cross)) { |
---|
719 | cross_method = LINES; |
---|
720 | save_hints = true; |
---|
721 | } |
---|
722 | } |
---|
723 | |
---|
724 | if (blob_method != LINES) { |
---|
725 | SetColour(col_WHITE); |
---|
726 | Clear(); |
---|
727 | SetDataTransform(); |
---|
728 | BeginBlobs(); |
---|
729 | DrawBlob(-m_Translation.GetX(), -m_Translation.GetY(), -m_Translation.GetZ()); |
---|
730 | EndBlobs(); |
---|
731 | static const unsigned char expected_blob[64 * 3] = { |
---|
732 | #define o 0,0,0 |
---|
733 | #define I 255,255,255 |
---|
734 | BLOB_TEXTURE |
---|
735 | #undef o |
---|
736 | #undef I |
---|
737 | }; |
---|
738 | if (!CheckVisualFidelity(expected_blob)) { |
---|
739 | blob_method = LINES; |
---|
740 | save_hints = true; |
---|
741 | } |
---|
742 | } |
---|
743 | |
---|
744 | wxConfigBase * cfg = wxConfigBase::Get(); |
---|
745 | cfg->Write(wxT("opengl_survex"), wxT(VERSION)); |
---|
746 | cfg->Write(wxT("opengl_vendor"), vendor); |
---|
747 | cfg->Write(wxT("opengl_renderer"), renderer); |
---|
748 | cfg->Write(wxT("blob_method"), blob_method); |
---|
749 | cfg->Write(wxT("cross_method"), cross_method); |
---|
750 | cfg->Flush(); |
---|
751 | save_hints = false; |
---|
752 | } |
---|
753 | |
---|
754 | void GLACanvas::EnableSmoothPolygons(bool filled) |
---|
755 | { |
---|
756 | // Prepare for drawing smoothly-shaded polygons. |
---|
757 | // Only use this when required (in particular lines in lists may not be |
---|
758 | // coloured correctly when this is enabled). |
---|
759 | |
---|
760 | glPushAttrib(GL_ENABLE_BIT|GL_LIGHTING_BIT|GL_POLYGON_BIT); |
---|
761 | if (filled) { |
---|
762 | glShadeModel(GL_SMOOTH); |
---|
763 | glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
---|
764 | } else { |
---|
765 | glDisable(GL_LINE_SMOOTH); |
---|
766 | glDisable(GL_TEXTURE_2D); |
---|
767 | glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); |
---|
768 | } |
---|
769 | CHECK_GL_ERROR("EnableSmoothPolygons", "glPolygonMode"); |
---|
770 | |
---|
771 | if (filled && m_SmoothShading) { |
---|
772 | static const GLfloat mat_specular[] = { 0.2, 0.2, 0.2, 1.0 }; |
---|
773 | static const GLfloat light_position[] = { -1.0, -1.0, -1.0, 0.0 }; |
---|
774 | static const GLfloat light_ambient[] = { 0.3, 0.3, 0.3, 1.0 }; |
---|
775 | static const GLfloat light_diffuse[] = { 0.7, 0.7, 0.7, 1.0 }; |
---|
776 | glEnable(GL_COLOR_MATERIAL); |
---|
777 | glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, mat_specular); |
---|
778 | glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 10.0); |
---|
779 | glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient); |
---|
780 | glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse); |
---|
781 | glLightfv(GL_LIGHT0, GL_POSITION, light_position); |
---|
782 | glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE); |
---|
783 | glEnable(GL_LIGHTING); |
---|
784 | glEnable(GL_LIGHT0); |
---|
785 | } |
---|
786 | } |
---|
787 | |
---|
788 | void GLACanvas::DisableSmoothPolygons() |
---|
789 | { |
---|
790 | glPopAttrib(); |
---|
791 | } |
---|
792 | |
---|
793 | void GLACanvas::PlaceNormal(const Vector3 &v) |
---|
794 | { |
---|
795 | // Add a normal (for polygons etc.) |
---|
796 | |
---|
797 | glNormal3d(v.GetX(), v.GetY(), v.GetZ()); |
---|
798 | } |
---|
799 | |
---|
800 | void GLACanvas::SetDataTransform() |
---|
801 | { |
---|
802 | // Set projection. |
---|
803 | glMatrixMode(GL_PROJECTION); |
---|
804 | CHECK_GL_ERROR("SetDataTransform", "glMatrixMode"); |
---|
805 | glLoadIdentity(); |
---|
806 | CHECK_GL_ERROR("SetDataTransform", "glLoadIdentity"); |
---|
807 | |
---|
808 | double aspect = double(y_size) / double(x_size); |
---|
809 | |
---|
810 | Double near_plane = 1.0; |
---|
811 | if (m_Perspective) { |
---|
812 | Double lr = near_plane * tan(rad(25.0)); |
---|
813 | Double far_plane = m_VolumeDiameter * 5 + near_plane; // FIXME: work out properly |
---|
814 | Double tb = lr * aspect; |
---|
815 | glFrustum(-lr, lr, -tb, tb, near_plane, far_plane); |
---|
816 | CHECK_GL_ERROR("SetViewportAndProjection", "glFrustum"); |
---|
817 | } else { |
---|
818 | near_plane = 0.0; |
---|
819 | assert(m_Scale != 0.0); |
---|
820 | Double lr = m_VolumeDiameter / m_Scale * 0.5; |
---|
821 | Double far_plane = m_VolumeDiameter + near_plane; |
---|
822 | Double tb = lr; |
---|
823 | if (aspect >= 1.0) { |
---|
824 | tb *= aspect; |
---|
825 | } else { |
---|
826 | lr /= aspect; |
---|
827 | } |
---|
828 | glOrtho(-lr, lr, -tb, tb, near_plane, far_plane); |
---|
829 | CHECK_GL_ERROR("SetViewportAndProjection", "glOrtho"); |
---|
830 | } |
---|
831 | |
---|
832 | // Set the modelview transform for drawing data. |
---|
833 | glMatrixMode(GL_MODELVIEW); |
---|
834 | CHECK_GL_ERROR("SetDataTransform", "glMatrixMode"); |
---|
835 | glLoadIdentity(); |
---|
836 | CHECK_GL_ERROR("SetDataTransform", "glLoadIdentity"); |
---|
837 | if (m_Perspective) { |
---|
838 | glTranslated(0.0, 0.0, -near_plane); |
---|
839 | } else { |
---|
840 | glTranslated(0.0, 0.0, -0.5 * m_VolumeDiameter); |
---|
841 | } |
---|
842 | CHECK_GL_ERROR("SetDataTransform", "glTranslated"); |
---|
843 | // Get axes the correct way around (z upwards, y into screen) |
---|
844 | glRotated(-90.0, 1.0, 0.0, 0.0); |
---|
845 | CHECK_GL_ERROR("SetDataTransform", "glRotated"); |
---|
846 | glRotated(-m_Tilt, 1.0, 0.0, 0.0); |
---|
847 | CHECK_GL_ERROR("SetDataTransform", "glRotated"); |
---|
848 | glRotated(m_Pan, 0.0, 0.0, 1.0); |
---|
849 | CHECK_GL_ERROR("SetDataTransform", "CopyToOpenGL"); |
---|
850 | if (m_Perspective) { |
---|
851 | glTranslated(m_Translation.GetX(), |
---|
852 | m_Translation.GetY(), |
---|
853 | m_Translation.GetZ()); |
---|
854 | CHECK_GL_ERROR("SetDataTransform", "glTranslated"); |
---|
855 | } |
---|
856 | |
---|
857 | // Save projection matrix. |
---|
858 | glGetDoublev(GL_PROJECTION_MATRIX, projection_matrix); |
---|
859 | CHECK_GL_ERROR("SetDataTransform", "glGetDoublev"); |
---|
860 | |
---|
861 | // Save viewport coordinates. |
---|
862 | glGetIntegerv(GL_VIEWPORT, viewport); |
---|
863 | CHECK_GL_ERROR("SetDataTransform", "glGetIntegerv"); |
---|
864 | |
---|
865 | // Save modelview matrix. |
---|
866 | glGetDoublev(GL_MODELVIEW_MATRIX, modelview_matrix); |
---|
867 | CHECK_GL_ERROR("SetDataTransform", "glGetDoublev"); |
---|
868 | |
---|
869 | if (!m_Perspective) { |
---|
870 | // Adjust the translation so we don't change the Z position of the model |
---|
871 | double X, Y, Z; |
---|
872 | gluProject(m_Translation.GetX(), |
---|
873 | m_Translation.GetY(), |
---|
874 | m_Translation.GetZ(), |
---|
875 | modelview_matrix, projection_matrix, viewport, |
---|
876 | &X, &Y, &Z); |
---|
877 | double Tx, Ty, Tz; |
---|
878 | gluUnProject(X, Y, 0.5, modelview_matrix, projection_matrix, viewport, |
---|
879 | &Tx, &Ty, &Tz); |
---|
880 | glTranslated(Tx, Ty, Tz); |
---|
881 | CHECK_GL_ERROR("SetDataTransform", "glTranslated"); |
---|
882 | glGetDoublev(GL_MODELVIEW_MATRIX, modelview_matrix); |
---|
883 | } |
---|
884 | |
---|
885 | glEnable(GL_DEPTH_TEST); |
---|
886 | CHECK_GL_ERROR("SetDataTransform", "glEnable GL_DEPTH_TEST"); |
---|
887 | |
---|
888 | if (m_Textured) { |
---|
889 | glBindTexture(GL_TEXTURE_2D, m_Texture); |
---|
890 | glEnable(GL_TEXTURE_2D); |
---|
891 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); |
---|
892 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_WRAP_S"); |
---|
893 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); |
---|
894 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_WRAP_T"); |
---|
895 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
---|
896 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
---|
897 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, |
---|
898 | GL_LINEAR_MIPMAP_LINEAR); |
---|
899 | CHECK_GL_ERROR("ToggleTextured", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
900 | glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); |
---|
901 | } else { |
---|
902 | glDisable(GL_TEXTURE_2D); |
---|
903 | } |
---|
904 | if (m_Fog) { |
---|
905 | glFogf(GL_FOG_START, near_plane); |
---|
906 | glFogf(GL_FOG_END, near_plane + m_VolumeDiameter); |
---|
907 | glEnable(GL_FOG); |
---|
908 | } else { |
---|
909 | glDisable(GL_FOG); |
---|
910 | } |
---|
911 | |
---|
912 | glEnable(GL_BLEND); |
---|
913 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
---|
914 | if (m_AntiAlias) { |
---|
915 | glEnable(GL_LINE_SMOOTH); |
---|
916 | } else { |
---|
917 | glDisable(GL_LINE_SMOOTH); |
---|
918 | } |
---|
919 | } |
---|
920 | |
---|
921 | void GLACanvas::SetIndicatorTransform() |
---|
922 | { |
---|
923 | list_flags |= NEVER_CACHE; |
---|
924 | |
---|
925 | // Set the modelview transform and projection for drawing indicators. |
---|
926 | |
---|
927 | glDisable(GL_DEPTH_TEST); |
---|
928 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_DEPTH_TEST"); |
---|
929 | glDisable(GL_FOG); |
---|
930 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_FOG"); |
---|
931 | |
---|
932 | // Just a simple 2D projection. |
---|
933 | glMatrixMode(GL_PROJECTION); |
---|
934 | CHECK_GL_ERROR("SetIndicatorTransform", "glMatrixMode"); |
---|
935 | glLoadIdentity(); |
---|
936 | CHECK_GL_ERROR("SetIndicatorTransform", "glLoadIdentity (2)"); |
---|
937 | gluOrtho2D(0, x_size, 0, y_size); |
---|
938 | CHECK_GL_ERROR("SetIndicatorTransform", "gluOrtho2D"); |
---|
939 | |
---|
940 | // No modelview transform. |
---|
941 | glMatrixMode(GL_MODELVIEW); |
---|
942 | CHECK_GL_ERROR("SetIndicatorTransform", "glMatrixMode"); |
---|
943 | glLoadIdentity(); |
---|
944 | CHECK_GL_ERROR("SetIndicatorTransform", "glLoadIdentity"); |
---|
945 | |
---|
946 | glDisable(GL_TEXTURE_2D); |
---|
947 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_TEXTURE_2D"); |
---|
948 | glDisable(GL_BLEND); |
---|
949 | CHECK_GL_ERROR("SetIndicatorTransform", "glDisable GL_BLEND"); |
---|
950 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); |
---|
951 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_WRAP_S"); |
---|
952 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); |
---|
953 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_WRAP_T"); |
---|
954 | glAlphaFunc(GL_GREATER, 0.5f); |
---|
955 | CHECK_GL_ERROR("SetIndicatorTransform", "glAlphaFunc"); |
---|
956 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
---|
957 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_MAG_FILTER"); |
---|
958 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
---|
959 | CHECK_GL_ERROR("SetIndicatorTransform", "glTexParameteri GL_TEXTURE_MIN_FILTER"); |
---|
960 | glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST); |
---|
961 | CHECK_GL_ERROR("SetIndicatorTransform", "glHint"); |
---|
962 | } |
---|
963 | |
---|
964 | void GLACanvas::FinishDrawing() |
---|
965 | { |
---|
966 | // Complete a redraw operation. |
---|
967 | |
---|
968 | if (double_buffered) { |
---|
969 | SwapBuffers(); |
---|
970 | } else { |
---|
971 | glFlush(); |
---|
972 | CHECK_GL_ERROR("FinishDrawing", "glFlush"); |
---|
973 | } |
---|
974 | } |
---|
975 | |
---|
976 | void GLACanvas::DrawList(unsigned int l) |
---|
977 | { |
---|
978 | // FIXME: uncomment to disable use of lists for debugging: |
---|
979 | // GenerateList(l); return; |
---|
980 | if (l >= drawing_lists.size()) drawing_lists.resize(l + 1); |
---|
981 | |
---|
982 | // We generate the OpenGL lists lazily to minimise delays on startup. |
---|
983 | // So check if we need to generate the OpenGL list now. |
---|
984 | if (drawing_lists[l].need_to_generate()) { |
---|
985 | // Clear list_flags so that we can note what conditions to invalidate |
---|
986 | // the cached OpenGL list on. |
---|
987 | list_flags = 0; |
---|
988 | |
---|
989 | #ifdef GLA_DEBUG |
---|
990 | printf("generating list #%u... ", l); |
---|
991 | m_Vertices = 0; |
---|
992 | #endif |
---|
993 | GenerateList(l); |
---|
994 | #ifdef GLA_DEBUG |
---|
995 | printf("done (%d vertices)\n", m_Vertices); |
---|
996 | #endif |
---|
997 | drawing_lists[l].finalise(list_flags); |
---|
998 | } |
---|
999 | |
---|
1000 | if (!drawing_lists[l].DrawList()) { |
---|
1001 | // That list isn't cached (which means it probably can't usefully be |
---|
1002 | // cached). |
---|
1003 | GenerateList(l); |
---|
1004 | } |
---|
1005 | } |
---|
1006 | |
---|
1007 | void GLACanvas::DrawListZPrepass(unsigned int l) |
---|
1008 | { |
---|
1009 | glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); |
---|
1010 | DrawList(l); |
---|
1011 | glDepthMask(GL_FALSE); |
---|
1012 | glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); |
---|
1013 | glDepthFunc(GL_EQUAL); |
---|
1014 | DrawList(l); |
---|
1015 | glDepthMask(GL_TRUE); |
---|
1016 | glDepthFunc(GL_LESS); |
---|
1017 | } |
---|
1018 | |
---|
1019 | void GLACanvas::DrawList2D(unsigned int l, glaCoord x, glaCoord y, Double rotation) |
---|
1020 | { |
---|
1021 | glMatrixMode(GL_PROJECTION); |
---|
1022 | CHECK_GL_ERROR("DrawList2D", "glMatrixMode"); |
---|
1023 | glPushMatrix(); |
---|
1024 | CHECK_GL_ERROR("DrawList2D", "glPushMatrix"); |
---|
1025 | glTranslated(x, y, 0); |
---|
1026 | CHECK_GL_ERROR("DrawList2D", "glTranslated"); |
---|
1027 | if (rotation != 0.0) { |
---|
1028 | glRotated(rotation, 0, 0, -1); |
---|
1029 | CHECK_GL_ERROR("DrawList2D", "glRotated"); |
---|
1030 | } |
---|
1031 | DrawList(l); |
---|
1032 | glMatrixMode(GL_PROJECTION); |
---|
1033 | CHECK_GL_ERROR("DrawList2D", "glMatrixMode 2"); |
---|
1034 | glPopMatrix(); |
---|
1035 | CHECK_GL_ERROR("DrawList2D", "glPopMatrix"); |
---|
1036 | } |
---|
1037 | |
---|
1038 | void GLACanvas::SetColour(const GLAPen& pen, double rgb_scale) |
---|
1039 | { |
---|
1040 | // Set the colour for subsequent operations. |
---|
1041 | glColor4f(pen.GetRed() * rgb_scale, pen.GetGreen() * rgb_scale, |
---|
1042 | pen.GetBlue() * rgb_scale, alpha); |
---|
1043 | } |
---|
1044 | |
---|
1045 | void GLACanvas::SetColour(const GLAPen& pen) |
---|
1046 | { |
---|
1047 | // Set the colour for subsequent operations. |
---|
1048 | glColor4d(pen.components[0], pen.components[1], pen.components[2], alpha); |
---|
1049 | } |
---|
1050 | |
---|
1051 | void GLACanvas::SetColour(gla_colour colour, double rgb_scale) |
---|
1052 | { |
---|
1053 | // Set the colour for subsequent operations. |
---|
1054 | rgb_scale /= 255.0; |
---|
1055 | glColor4f(COLOURS[colour].r * rgb_scale, |
---|
1056 | COLOURS[colour].g * rgb_scale, |
---|
1057 | COLOURS[colour].b * rgb_scale, |
---|
1058 | alpha); |
---|
1059 | } |
---|
1060 | |
---|
1061 | void GLACanvas::SetColour(gla_colour colour) |
---|
1062 | { |
---|
1063 | // Set the colour for subsequent operations. |
---|
1064 | if (alpha == 1.0) { |
---|
1065 | glColor3ubv(&COLOURS[colour].r); |
---|
1066 | } else { |
---|
1067 | glColor4ub(COLOURS[colour].r, |
---|
1068 | COLOURS[colour].g, |
---|
1069 | COLOURS[colour].b, |
---|
1070 | (unsigned char)(255 * alpha)); |
---|
1071 | } |
---|
1072 | } |
---|
1073 | |
---|
1074 | void GLACanvas::DrawText(glaCoord x, glaCoord y, glaCoord z, const wxString& str) |
---|
1075 | { |
---|
1076 | // Draw a text string on the current buffer in the current font. |
---|
1077 | glRasterPos3d(x, y, z); |
---|
1078 | CHECK_GL_ERROR("DrawText", "glRasterPos3d"); |
---|
1079 | m_Font.write_string(str.data(), str.size()); |
---|
1080 | } |
---|
1081 | |
---|
1082 | void GLACanvas::DrawIndicatorText(int x, int y, const wxString& str) |
---|
1083 | { |
---|
1084 | glRasterPos2d(x, y); |
---|
1085 | CHECK_GL_ERROR("DrawIndicatorText", "glRasterPos2d"); |
---|
1086 | m_Font.write_string(str.data(), str.size()); |
---|
1087 | } |
---|
1088 | |
---|
1089 | void GLACanvas::GetTextExtent(const wxString& str, int * x_ext, int * y_ext) const |
---|
1090 | { |
---|
1091 | m_Font.get_text_extent(str.data(), str.size(), x_ext, y_ext); |
---|
1092 | } |
---|
1093 | |
---|
1094 | void GLACanvas::BeginQuadrilaterals() |
---|
1095 | { |
---|
1096 | // Commence drawing of quadrilaterals. |
---|
1097 | |
---|
1098 | glBegin(GL_QUADS); |
---|
1099 | } |
---|
1100 | |
---|
1101 | void GLACanvas::EndQuadrilaterals() |
---|
1102 | { |
---|
1103 | // Finish drawing of quadrilaterals. |
---|
1104 | |
---|
1105 | glEnd(); |
---|
1106 | CHECK_GL_ERROR("EndQuadrilaterals", "glEnd GL_QUADS"); |
---|
1107 | } |
---|
1108 | |
---|
1109 | void GLACanvas::BeginLines() |
---|
1110 | { |
---|
1111 | // Commence drawing of a set of lines. |
---|
1112 | |
---|
1113 | glBegin(GL_LINES); |
---|
1114 | } |
---|
1115 | |
---|
1116 | void GLACanvas::EndLines() |
---|
1117 | { |
---|
1118 | // Finish drawing of a set of lines. |
---|
1119 | |
---|
1120 | glEnd(); |
---|
1121 | CHECK_GL_ERROR("EndLines", "glEnd GL_LINES"); |
---|
1122 | } |
---|
1123 | |
---|
1124 | void GLACanvas::BeginTriangles() |
---|
1125 | { |
---|
1126 | // Commence drawing of a set of triangles. |
---|
1127 | |
---|
1128 | glBegin(GL_TRIANGLES); |
---|
1129 | } |
---|
1130 | |
---|
1131 | void GLACanvas::EndTriangles() |
---|
1132 | { |
---|
1133 | // Finish drawing of a set of triangles. |
---|
1134 | |
---|
1135 | glEnd(); |
---|
1136 | CHECK_GL_ERROR("EndTriangles", "glEnd GL_TRIANGLES"); |
---|
1137 | } |
---|
1138 | |
---|
1139 | void GLACanvas::BeginTriangleStrip() |
---|
1140 | { |
---|
1141 | // Commence drawing of a triangle strip. |
---|
1142 | |
---|
1143 | glBegin(GL_TRIANGLE_STRIP); |
---|
1144 | } |
---|
1145 | |
---|
1146 | void GLACanvas::EndTriangleStrip() |
---|
1147 | { |
---|
1148 | // Finish drawing of a triangle strip. |
---|
1149 | |
---|
1150 | glEnd(); |
---|
1151 | CHECK_GL_ERROR("EndTriangleStrip", "glEnd GL_TRIANGLE_STRIP"); |
---|
1152 | } |
---|
1153 | |
---|
1154 | void GLACanvas::BeginPolyline() |
---|
1155 | { |
---|
1156 | // Commence drawing of a polyline. |
---|
1157 | |
---|
1158 | glBegin(GL_LINE_STRIP); |
---|
1159 | } |
---|
1160 | |
---|
1161 | void GLACanvas::EndPolyline() |
---|
1162 | { |
---|
1163 | // Finish drawing of a polyline. |
---|
1164 | |
---|
1165 | glEnd(); |
---|
1166 | CHECK_GL_ERROR("EndPolyline", "glEnd GL_LINE_STRIP"); |
---|
1167 | } |
---|
1168 | |
---|
1169 | void GLACanvas::BeginPolyloop() |
---|
1170 | { |
---|
1171 | // Commence drawing of a polyloop. |
---|
1172 | |
---|
1173 | glBegin(GL_LINE_LOOP); |
---|
1174 | } |
---|
1175 | |
---|
1176 | void GLACanvas::EndPolyloop() |
---|
1177 | { |
---|
1178 | // Finish drawing of a polyloop. |
---|
1179 | |
---|
1180 | glEnd(); |
---|
1181 | CHECK_GL_ERROR("EndPolyloop", "glEnd GL_LINE_LOOP"); |
---|
1182 | } |
---|
1183 | |
---|
1184 | void GLACanvas::BeginPolygon() |
---|
1185 | { |
---|
1186 | // Commence drawing of a polygon. |
---|
1187 | |
---|
1188 | glBegin(GL_POLYGON); |
---|
1189 | } |
---|
1190 | |
---|
1191 | void GLACanvas::EndPolygon() |
---|
1192 | { |
---|
1193 | // Finish drawing of a polygon. |
---|
1194 | |
---|
1195 | glEnd(); |
---|
1196 | CHECK_GL_ERROR("EndPolygon", "glEnd GL_POLYGON"); |
---|
1197 | } |
---|
1198 | |
---|
1199 | void GLACanvas::PlaceVertex(glaCoord x, glaCoord y, glaCoord z) |
---|
1200 | { |
---|
1201 | // Place a vertex for the current object being drawn. |
---|
1202 | |
---|
1203 | #ifdef GLA_DEBUG |
---|
1204 | m_Vertices++; |
---|
1205 | #endif |
---|
1206 | glVertex3d(x, y, z); |
---|
1207 | } |
---|
1208 | |
---|
1209 | void GLACanvas::PlaceVertex(glaCoord x, glaCoord y, glaCoord z, |
---|
1210 | glaTexCoord tex_x, glaTexCoord tex_y) |
---|
1211 | { |
---|
1212 | // Place a vertex for the current object being drawn. |
---|
1213 | |
---|
1214 | #ifdef GLA_DEBUG |
---|
1215 | m_Vertices++; |
---|
1216 | #endif |
---|
1217 | glTexCoord2f(tex_x, tex_y); |
---|
1218 | glVertex3d(x, y, z); |
---|
1219 | } |
---|
1220 | |
---|
1221 | void GLACanvas::PlaceIndicatorVertex(glaCoord x, glaCoord y) |
---|
1222 | { |
---|
1223 | // Place a vertex for the current indicator object being drawn. |
---|
1224 | |
---|
1225 | PlaceVertex(x, y, 0.0); |
---|
1226 | } |
---|
1227 | |
---|
1228 | void GLACanvas::BeginBlobs() |
---|
1229 | { |
---|
1230 | // Commence drawing of a set of blobs. |
---|
1231 | if (blob_method == SPRITE) { |
---|
1232 | glPushAttrib(GL_ENABLE_BIT|GL_POINT_BIT); |
---|
1233 | CHECK_GL_ERROR("BeginBlobs", "glPushAttrib"); |
---|
1234 | glBindTexture(GL_TEXTURE_2D, m_BlobTexture); |
---|
1235 | CHECK_GL_ERROR("BeginBlobs", "glBindTexture"); |
---|
1236 | glEnable(GL_ALPHA_TEST); |
---|
1237 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_ALPHA_TEST"); |
---|
1238 | glPointSize(8); |
---|
1239 | CHECK_GL_ERROR("BeginBlobs", "glPointSize"); |
---|
1240 | glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE); |
---|
1241 | CHECK_GL_ERROR("BeginBlobs", "glTexEnvi GL_POINT_SPRITE"); |
---|
1242 | glEnable(GL_TEXTURE_2D); |
---|
1243 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_TEXTURE_2D"); |
---|
1244 | glEnable(GL_POINT_SPRITE); |
---|
1245 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_POINT_SPRITE"); |
---|
1246 | glBegin(GL_POINTS); |
---|
1247 | } else if (blob_method == POINT) { |
---|
1248 | glPushAttrib(GL_ENABLE_BIT); |
---|
1249 | CHECK_GL_ERROR("BeginBlobs", "glPushAttrib"); |
---|
1250 | glEnable(GL_ALPHA_TEST); |
---|
1251 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_ALPHA_TEST"); |
---|
1252 | glEnable(GL_POINT_SMOOTH); |
---|
1253 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_POINT_SMOOTH"); |
---|
1254 | glBegin(GL_POINTS); |
---|
1255 | } else { |
---|
1256 | glPushAttrib(GL_TRANSFORM_BIT|GL_VIEWPORT_BIT|GL_ENABLE_BIT); |
---|
1257 | CHECK_GL_ERROR("BeginBlobs", "glPushAttrib"); |
---|
1258 | SetIndicatorTransform(); |
---|
1259 | glEnable(GL_DEPTH_TEST); |
---|
1260 | CHECK_GL_ERROR("BeginBlobs", "glEnable GL_DEPTH_TEST"); |
---|
1261 | glBegin(GL_LINES); |
---|
1262 | } |
---|
1263 | } |
---|
1264 | |
---|
1265 | void GLACanvas::EndBlobs() |
---|
1266 | { |
---|
1267 | // Finish drawing of a set of blobs. |
---|
1268 | glEnd(); |
---|
1269 | if (blob_method != LINES) { |
---|
1270 | CHECK_GL_ERROR("EndBlobs", "glEnd GL_POINTS"); |
---|
1271 | } else { |
---|
1272 | CHECK_GL_ERROR("EndBlobs", "glEnd GL_LINES"); |
---|
1273 | } |
---|
1274 | glPopAttrib(); |
---|
1275 | CHECK_GL_ERROR("EndBlobs", "glPopAttrib"); |
---|
1276 | } |
---|
1277 | |
---|
1278 | void GLACanvas::DrawBlob(glaCoord x, glaCoord y, glaCoord z) |
---|
1279 | { |
---|
1280 | if (blob_method != LINES) { |
---|
1281 | // Draw a marker. |
---|
1282 | PlaceVertex(x, y, z); |
---|
1283 | } else { |
---|
1284 | double X, Y, Z; |
---|
1285 | if (!Transform(Vector3(x, y, z), &X, &Y, &Z)) { |
---|
1286 | printf("bad transform\n"); |
---|
1287 | return; |
---|
1288 | } |
---|
1289 | // Stuff behind us (in perspective view) will get clipped, |
---|
1290 | // but we can save effort with a cheap check here. |
---|
1291 | if (Z <= 0) return; |
---|
1292 | |
---|
1293 | X -= BLOB_DIAMETER * 0.5; |
---|
1294 | Y -= BLOB_DIAMETER * 0.5; |
---|
1295 | |
---|
1296 | PlaceVertex(X, Y + 1, Z); |
---|
1297 | PlaceVertex(X, Y + (BLOB_DIAMETER - 1), Z); |
---|
1298 | |
---|
1299 | for (int i = 1; i < (BLOB_DIAMETER - 1); ++i) { |
---|
1300 | PlaceVertex(X + i, Y, Z); |
---|
1301 | PlaceVertex(X + i, Y + BLOB_DIAMETER, Z); |
---|
1302 | } |
---|
1303 | |
---|
1304 | PlaceVertex(X + (BLOB_DIAMETER - 1), Y + 1, Z); |
---|
1305 | PlaceVertex(X + (BLOB_DIAMETER - 1), Y + (BLOB_DIAMETER - 1), Z); |
---|
1306 | } |
---|
1307 | #ifdef GLA_DEBUG |
---|
1308 | m_Vertices++; |
---|
1309 | #endif |
---|
1310 | } |
---|
1311 | |
---|
1312 | void GLACanvas::DrawBlob(glaCoord x, glaCoord y) |
---|
1313 | { |
---|
1314 | if (blob_method != LINES) { |
---|
1315 | // Draw a marker. |
---|
1316 | PlaceVertex(x, y, 0); |
---|
1317 | } else { |
---|
1318 | x -= BLOB_DIAMETER * 0.5; |
---|
1319 | y -= BLOB_DIAMETER * 0.5; |
---|
1320 | |
---|
1321 | PlaceVertex(x, y + 1, 0); |
---|
1322 | PlaceVertex(x, y + (BLOB_DIAMETER - 1), 0); |
---|
1323 | |
---|
1324 | for (int i = 1; i < (BLOB_DIAMETER - 1); ++i) { |
---|
1325 | PlaceVertex(x + i, y, 0); |
---|
1326 | PlaceVertex(x + i, y + BLOB_DIAMETER, 0); |
---|
1327 | } |
---|
1328 | |
---|
1329 | PlaceVertex(x + (BLOB_DIAMETER - 1), y + 1, 0); |
---|
1330 | PlaceVertex(x + (BLOB_DIAMETER - 1), y + (BLOB_DIAMETER - 1), 0); |
---|
1331 | } |
---|
1332 | #ifdef GLA_DEBUG |
---|
1333 | m_Vertices++; |
---|
1334 | #endif |
---|
1335 | } |
---|
1336 | |
---|
1337 | void GLACanvas::BeginCrosses() |
---|
1338 | { |
---|
1339 | // Plot crosses. |
---|
1340 | if (cross_method == SPRITE) { |
---|
1341 | glPushAttrib(GL_ENABLE_BIT|GL_POINT_BIT); |
---|
1342 | CHECK_GL_ERROR("BeginCrosses", "glPushAttrib"); |
---|
1343 | glBindTexture(GL_TEXTURE_2D, m_CrossTexture); |
---|
1344 | CHECK_GL_ERROR("BeginCrosses", "glBindTexture"); |
---|
1345 | glEnable(GL_ALPHA_TEST); |
---|
1346 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_ALPHA_TEST"); |
---|
1347 | glPointSize(8); |
---|
1348 | CHECK_GL_ERROR("BeginCrosses", "glPointSize"); |
---|
1349 | glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE); |
---|
1350 | CHECK_GL_ERROR("BeginCrosses", "glTexEnvi GL_POINT_SPRITE"); |
---|
1351 | glEnable(GL_TEXTURE_2D); |
---|
1352 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_TEXTURE_2D"); |
---|
1353 | glEnable(GL_POINT_SPRITE); |
---|
1354 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_POINT_SPRITE"); |
---|
1355 | glBegin(GL_POINTS); |
---|
1356 | } else { |
---|
1357 | // To get the crosses to appear at a constant size and orientation on |
---|
1358 | // screen, we plot them in the Indicator transform coordinates (which |
---|
1359 | // unfortunately means they can't be usefully put in an opengl display |
---|
1360 | // list). |
---|
1361 | glPushAttrib(GL_TRANSFORM_BIT|GL_VIEWPORT_BIT|GL_ENABLE_BIT); |
---|
1362 | CHECK_GL_ERROR("BeginCrosses", "glPushAttrib 2"); |
---|
1363 | SetIndicatorTransform(); |
---|
1364 | // Align line drawing to pixel centres to get pixel-perfect rendering |
---|
1365 | // (graphics card and driver bugs aside). |
---|
1366 | glTranslated(-0.5, -0.5, 0); |
---|
1367 | CHECK_GL_ERROR("BeginCrosses", "glTranslated"); |
---|
1368 | glEnable(GL_DEPTH_TEST); |
---|
1369 | CHECK_GL_ERROR("BeginCrosses", "glEnable GL_DEPTH_TEST"); |
---|
1370 | glBegin(GL_LINES); |
---|
1371 | } |
---|
1372 | } |
---|
1373 | |
---|
1374 | void GLACanvas::EndCrosses() |
---|
1375 | { |
---|
1376 | glEnd(); |
---|
1377 | if (cross_method == SPRITE) { |
---|
1378 | CHECK_GL_ERROR("EndCrosses", "glEnd GL_POINTS"); |
---|
1379 | } else { |
---|
1380 | CHECK_GL_ERROR("EndCrosses", "glEnd GL_LINES"); |
---|
1381 | } |
---|
1382 | glPopAttrib(); |
---|
1383 | CHECK_GL_ERROR("EndCrosses", "glPopAttrib"); |
---|
1384 | } |
---|
1385 | |
---|
1386 | void GLACanvas::DrawCross(glaCoord x, glaCoord y, glaCoord z) |
---|
1387 | { |
---|
1388 | if (cross_method == SPRITE) { |
---|
1389 | // Draw a marker. |
---|
1390 | PlaceVertex(x, y, z); |
---|
1391 | } else { |
---|
1392 | double X, Y, Z; |
---|
1393 | if (!Transform(Vector3(x, y, z), &X, &Y, &Z)) { |
---|
1394 | printf("bad transform\n"); |
---|
1395 | return; |
---|
1396 | } |
---|
1397 | // Stuff behind us (in perspective view) will get clipped, |
---|
1398 | // but we can save effort with a cheap check here. |
---|
1399 | if (Z <= 0) return; |
---|
1400 | |
---|
1401 | // Round to integers before adding on the offsets for the |
---|
1402 | // cross arms to avoid uneven crosses. |
---|
1403 | X = rint(X); |
---|
1404 | Y = rint(Y); |
---|
1405 | // Need to extend lines by an extra pixel (which shouldn't get drawn by |
---|
1406 | // the diamond-exit rule). |
---|
1407 | PlaceVertex(X - 3, Y - 3, Z); |
---|
1408 | PlaceVertex(X + 4, Y + 4, Z); |
---|
1409 | PlaceVertex(X - 3, Y + 3, Z); |
---|
1410 | PlaceVertex(X + 4, Y - 4, Z); |
---|
1411 | } |
---|
1412 | #ifdef GLA_DEBUG |
---|
1413 | m_Vertices++; |
---|
1414 | #endif |
---|
1415 | } |
---|
1416 | |
---|
1417 | void GLACanvas::DrawRing(glaCoord x, glaCoord y) |
---|
1418 | { |
---|
1419 | // Draw an unfilled circle |
---|
1420 | const Double radius = 4; |
---|
1421 | assert(m_Quadric); |
---|
1422 | glMatrixMode(GL_MODELVIEW); |
---|
1423 | CHECK_GL_ERROR("DrawRing", "glMatrixMode"); |
---|
1424 | glPushMatrix(); |
---|
1425 | CHECK_GL_ERROR("DrawRing", "glPushMatrix"); |
---|
1426 | glTranslated(x, y, 0.0); |
---|
1427 | CHECK_GL_ERROR("DrawRing", "glTranslated"); |
---|
1428 | gluDisk(m_Quadric, radius - 1.0, radius, 12, 1); |
---|
1429 | CHECK_GL_ERROR("DrawRing", "gluDisk"); |
---|
1430 | glPopMatrix(); |
---|
1431 | CHECK_GL_ERROR("DrawRing", "glPopMatrix"); |
---|
1432 | } |
---|
1433 | |
---|
1434 | void GLACanvas::DrawRectangle(gla_colour fill, gla_colour edge, |
---|
1435 | glaCoord x0, glaCoord y0, glaCoord w, glaCoord h) |
---|
1436 | { |
---|
1437 | // Draw a filled rectangle with an edge in the indicator plane. |
---|
1438 | // (x0, y0) specify the bottom-left corner of the rectangle and (w, h) the |
---|
1439 | // size. |
---|
1440 | |
---|
1441 | SetColour(fill); |
---|
1442 | BeginQuadrilaterals(); |
---|
1443 | PlaceIndicatorVertex(x0, y0); |
---|
1444 | PlaceIndicatorVertex(x0 + w, y0); |
---|
1445 | PlaceIndicatorVertex(x0 + w, y0 + h); |
---|
1446 | PlaceIndicatorVertex(x0, y0 + h); |
---|
1447 | EndQuadrilaterals(); |
---|
1448 | |
---|
1449 | if (edge != fill) { |
---|
1450 | SetColour(edge); |
---|
1451 | BeginPolyline(); |
---|
1452 | PlaceIndicatorVertex(x0, y0); |
---|
1453 | PlaceIndicatorVertex(x0 + w, y0); |
---|
1454 | PlaceIndicatorVertex(x0 + w, y0 + h); |
---|
1455 | PlaceIndicatorVertex(x0, y0 + h); |
---|
1456 | PlaceIndicatorVertex(x0, y0); |
---|
1457 | EndPolyline(); |
---|
1458 | } |
---|
1459 | } |
---|
1460 | |
---|
1461 | void |
---|
1462 | GLACanvas::DrawShadedRectangle(const GLAPen & fill_bot, const GLAPen & fill_top, |
---|
1463 | glaCoord x0, glaCoord y0, |
---|
1464 | glaCoord w, glaCoord h) |
---|
1465 | { |
---|
1466 | // Draw a graduated filled rectangle in the indicator plane. |
---|
1467 | // (x0, y0) specify the bottom-left corner of the rectangle and (w, h) the |
---|
1468 | // size. |
---|
1469 | |
---|
1470 | glShadeModel(GL_SMOOTH); |
---|
1471 | CHECK_GL_ERROR("DrawShadedRectangle", "glShadeModel GL_SMOOTH"); |
---|
1472 | BeginQuadrilaterals(); |
---|
1473 | SetColour(fill_bot); |
---|
1474 | PlaceIndicatorVertex(x0, y0); |
---|
1475 | PlaceIndicatorVertex(x0 + w, y0); |
---|
1476 | SetColour(fill_top); |
---|
1477 | PlaceIndicatorVertex(x0 + w, y0 + h); |
---|
1478 | PlaceIndicatorVertex(x0, y0 + h); |
---|
1479 | EndQuadrilaterals(); |
---|
1480 | glShadeModel(GL_FLAT); |
---|
1481 | CHECK_GL_ERROR("DrawShadedRectangle", "glShadeModel GL_FLAT"); |
---|
1482 | } |
---|
1483 | |
---|
1484 | void GLACanvas::DrawCircle(gla_colour edge, gla_colour fill, |
---|
1485 | glaCoord cx, glaCoord cy, glaCoord radius) |
---|
1486 | { |
---|
1487 | // Draw a filled circle with an edge. |
---|
1488 | SetColour(fill); |
---|
1489 | glMatrixMode(GL_MODELVIEW); |
---|
1490 | CHECK_GL_ERROR("DrawCircle", "glMatrixMode"); |
---|
1491 | glPushMatrix(); |
---|
1492 | CHECK_GL_ERROR("DrawCircle", "glPushMatrix"); |
---|
1493 | glTranslated(cx, cy, 0.0); |
---|
1494 | CHECK_GL_ERROR("DrawCircle", "glTranslated"); |
---|
1495 | assert(m_Quadric); |
---|
1496 | gluDisk(m_Quadric, 0.0, radius, 36, 1); |
---|
1497 | CHECK_GL_ERROR("DrawCircle", "gluDisk"); |
---|
1498 | SetColour(edge); |
---|
1499 | gluDisk(m_Quadric, radius - 1.0, radius, 36, 1); |
---|
1500 | CHECK_GL_ERROR("DrawCircle", "gluDisk (2)"); |
---|
1501 | glPopMatrix(); |
---|
1502 | CHECK_GL_ERROR("DrawCircle", "glPopMatrix"); |
---|
1503 | } |
---|
1504 | |
---|
1505 | void GLACanvas::DrawSemicircle(gla_colour edge, gla_colour fill, |
---|
1506 | glaCoord cx, glaCoord cy, |
---|
1507 | glaCoord radius, glaCoord start) |
---|
1508 | { |
---|
1509 | // Draw a filled semicircle with an edge. |
---|
1510 | // The semicircle extends from "start" deg to "start"+180 deg (increasing |
---|
1511 | // clockwise, 0 deg upwards). |
---|
1512 | SetColour(fill); |
---|
1513 | glMatrixMode(GL_MODELVIEW); |
---|
1514 | CHECK_GL_ERROR("DrawSemicircle", "glMatrixMode"); |
---|
1515 | glPushMatrix(); |
---|
1516 | CHECK_GL_ERROR("DrawSemicircle", "glPushMatrix"); |
---|
1517 | glTranslated(cx, cy, 0.0); |
---|
1518 | CHECK_GL_ERROR("DrawSemicircle", "glTranslated"); |
---|
1519 | assert(m_Quadric); |
---|
1520 | gluPartialDisk(m_Quadric, 0.0, radius, 36, 1, start, 180.0); |
---|
1521 | CHECK_GL_ERROR("DrawSemicircle", "gluPartialDisk"); |
---|
1522 | SetColour(edge); |
---|
1523 | gluPartialDisk(m_Quadric, radius - 1.0, radius, 36, 1, start, 180.0); |
---|
1524 | CHECK_GL_ERROR("DrawSemicircle", "gluPartialDisk (2)"); |
---|
1525 | glPopMatrix(); |
---|
1526 | CHECK_GL_ERROR("DrawSemicircle", "glPopMatrix"); |
---|
1527 | } |
---|
1528 | |
---|
1529 | void |
---|
1530 | GLACanvas::DrawTriangle(gla_colour edge, gla_colour fill, |
---|
1531 | const Vector3 &p0, const Vector3 &p1, const Vector3 &p2) |
---|
1532 | { |
---|
1533 | // Draw a filled triangle with an edge. |
---|
1534 | |
---|
1535 | SetColour(fill); |
---|
1536 | BeginTriangles(); |
---|
1537 | PlaceIndicatorVertex(p0.GetX(), p0.GetY()); |
---|
1538 | PlaceIndicatorVertex(p1.GetX(), p1.GetY()); |
---|
1539 | PlaceIndicatorVertex(p2.GetX(), p2.GetY()); |
---|
1540 | EndTriangles(); |
---|
1541 | |
---|
1542 | SetColour(edge); |
---|
1543 | glBegin(GL_LINE_STRIP); |
---|
1544 | PlaceIndicatorVertex(p0.GetX(), p0.GetY()); |
---|
1545 | PlaceIndicatorVertex(p1.GetX(), p1.GetY()); |
---|
1546 | PlaceIndicatorVertex(p2.GetX(), p2.GetY()); |
---|
1547 | glEnd(); |
---|
1548 | CHECK_GL_ERROR("DrawTriangle", "glEnd GL_LINE_STRIP"); |
---|
1549 | } |
---|
1550 | |
---|
1551 | void GLACanvas::EnableDashedLines() |
---|
1552 | { |
---|
1553 | // Enable dashed lines, and start drawing in them. |
---|
1554 | |
---|
1555 | glLineStipple(1, 0x3333); |
---|
1556 | CHECK_GL_ERROR("EnableDashedLines", "glLineStipple"); |
---|
1557 | glEnable(GL_LINE_STIPPLE); |
---|
1558 | CHECK_GL_ERROR("EnableDashedLines", "glEnable GL_LINE_STIPPLE"); |
---|
1559 | } |
---|
1560 | |
---|
1561 | void GLACanvas::DisableDashedLines() |
---|
1562 | { |
---|
1563 | glDisable(GL_LINE_STIPPLE); |
---|
1564 | CHECK_GL_ERROR("DisableDashedLines", "glDisable GL_LINE_STIPPLE"); |
---|
1565 | } |
---|
1566 | |
---|
1567 | bool GLACanvas::Transform(const Vector3 & v, |
---|
1568 | double* x_out, double* y_out, double* z_out) const |
---|
1569 | { |
---|
1570 | // Convert from data coordinates to screen coordinates. |
---|
1571 | |
---|
1572 | // Perform the projection. |
---|
1573 | return gluProject(v.GetX(), v.GetY(), v.GetZ(), |
---|
1574 | modelview_matrix, projection_matrix, viewport, |
---|
1575 | x_out, y_out, z_out); |
---|
1576 | } |
---|
1577 | |
---|
1578 | void GLACanvas::ReverseTransform(Double x, Double y, |
---|
1579 | double* x_out, double* y_out, double* z_out) const |
---|
1580 | { |
---|
1581 | // Convert from screen coordinates to data coordinates. |
---|
1582 | |
---|
1583 | // Perform the projection. |
---|
1584 | gluUnProject(x, y, 0.0, modelview_matrix, projection_matrix, viewport, |
---|
1585 | x_out, y_out, z_out); |
---|
1586 | CHECK_GL_ERROR("ReverseTransform", "gluUnProject"); |
---|
1587 | } |
---|
1588 | |
---|
1589 | Double GLACanvas::SurveyUnitsAcrossViewport() const |
---|
1590 | { |
---|
1591 | // Measure the current viewport in survey units, taking into account the |
---|
1592 | // current display scale. |
---|
1593 | |
---|
1594 | assert(m_Scale != 0.0); |
---|
1595 | list_flags |= INVALIDATE_ON_SCALE; |
---|
1596 | Double result = m_VolumeDiameter / m_Scale; |
---|
1597 | if (y_size < x_size) { |
---|
1598 | result = result * x_size / y_size; |
---|
1599 | } |
---|
1600 | return result; |
---|
1601 | } |
---|
1602 | |
---|
1603 | void GLACanvas::ToggleSmoothShading() |
---|
1604 | { |
---|
1605 | m_SmoothShading = !m_SmoothShading; |
---|
1606 | } |
---|
1607 | |
---|
1608 | void GLACanvas::ToggleTextured() |
---|
1609 | { |
---|
1610 | m_Textured = !m_Textured; |
---|
1611 | if (m_Textured && m_Texture == 0) { |
---|
1612 | glGenTextures(1, &m_Texture); |
---|
1613 | CHECK_GL_ERROR("ToggleTextured", "glGenTextures"); |
---|
1614 | |
---|
1615 | glBindTexture(GL_TEXTURE_2D, m_Texture); |
---|
1616 | CHECK_GL_ERROR("ToggleTextured", "glBindTexture"); |
---|
1617 | |
---|
1618 | ::wxInitAllImageHandlers(); |
---|
1619 | |
---|
1620 | wxImage img; |
---|
1621 | wxString texture(wmsg_cfgpth()); |
---|
1622 | texture += wxCONFIG_PATH_SEPARATOR; |
---|
1623 | texture += wxT("images"); |
---|
1624 | texture += wxCONFIG_PATH_SEPARATOR; |
---|
1625 | texture += wxT("texture.png"); |
---|
1626 | if (!img.LoadFile(texture, wxBITMAP_TYPE_PNG)) { |
---|
1627 | // FIXME |
---|
1628 | fprintf(stderr, "Couldn't load image.\n"); |
---|
1629 | exit(1); |
---|
1630 | } |
---|
1631 | |
---|
1632 | // Generate mipmaps. |
---|
1633 | gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGB, // was GL_LUMINANCE |
---|
1634 | img.GetWidth(), img.GetHeight(), |
---|
1635 | GL_RGB, GL_UNSIGNED_BYTE, img.GetData()); |
---|
1636 | CHECK_GL_ERROR("ToggleTextured", "gluBuild2DMipmaps"); |
---|
1637 | |
---|
1638 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
---|
1639 | CHECK_GL_ERROR("ToggleTextured", "glTexEnvi"); |
---|
1640 | } |
---|
1641 | } |
---|
1642 | |
---|
1643 | bool GLACanvas::SaveScreenshot(const wxString & fnm, wxBitmapType type) const |
---|
1644 | { |
---|
1645 | const int width = x_size; |
---|
1646 | const int height = y_size; |
---|
1647 | unsigned char *pixels = (unsigned char *)malloc(3 * width * (height + 1)); |
---|
1648 | if (!pixels) return false; |
---|
1649 | glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *)pixels); |
---|
1650 | CHECK_GL_ERROR("SaveScreenshot", "glReadPixels"); |
---|
1651 | unsigned char * tmp_row = pixels + 3 * width * height; |
---|
1652 | // We need to flip the image vertically - this approach should be more |
---|
1653 | // efficient than using wxImage::Mirror(false) as that creates a new |
---|
1654 | // wxImage object. |
---|
1655 | for (int y = height / 2 - 1; y >= 0; --y) { |
---|
1656 | unsigned char * upper = pixels + 3 * width * y; |
---|
1657 | unsigned char * lower = pixels + 3 * width * (height - y - 1); |
---|
1658 | memcpy(tmp_row, upper, 3 * width); |
---|
1659 | memcpy(upper, lower, 3 * width); |
---|
1660 | memcpy(lower, tmp_row, 3 * width); |
---|
1661 | } |
---|
1662 | // NB wxImage constructor calls free(pixels) for us. |
---|
1663 | wxImage grab(width, height, pixels); |
---|
1664 | return grab.SaveFile(fnm, type); |
---|
1665 | } |
---|
1666 | |
---|
1667 | bool GLACanvas::CheckVisualFidelity(const unsigned char * target) const |
---|
1668 | { |
---|
1669 | unsigned char pixels[3 * 8 * 8]; |
---|
1670 | if (double_buffered) { |
---|
1671 | glReadBuffer(GL_BACK); |
---|
1672 | CHECK_GL_ERROR("FirstShow", "glReadBuffer"); |
---|
1673 | } |
---|
1674 | glReadPixels(x_size / 2 - 4, y_size / 2 - 5, 8, 8, |
---|
1675 | GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *)pixels); |
---|
1676 | CHECK_GL_ERROR("CheckVisualFidelity", "glReadPixels"); |
---|
1677 | if (double_buffered) { |
---|
1678 | glReadBuffer(GL_FRONT); |
---|
1679 | CHECK_GL_ERROR("FirstShow", "glReadBuffer"); |
---|
1680 | } |
---|
1681 | #if 0 |
---|
1682 | // Show what got drawn and what was expected for debugging. |
---|
1683 | for (int y = 0; y < 8; ++y) { |
---|
1684 | for (int x = 0; x < 8; ++x) { |
---|
1685 | int o = (y * 8 + x) * 3; |
---|
1686 | printf("%c", pixels[o] ? 'X' : '.'); |
---|
1687 | } |
---|
1688 | printf(" "); |
---|
1689 | for (int x = 0; x < 8; ++x) { |
---|
1690 | int o = (y * 8 + x) * 3; |
---|
1691 | printf("%c", target[o] ? 'X' : '.'); |
---|
1692 | } |
---|
1693 | printf("\n"); |
---|
1694 | } |
---|
1695 | #endif |
---|
1696 | return (memcmp(pixels, target, sizeof(pixels)) == 0); |
---|
1697 | } |
---|
1698 | |
---|
1699 | void GLACanvas::ReadPixels(int width, int height, unsigned char * buf) const |
---|
1700 | { |
---|
1701 | CHECK_GL_ERROR("ReadPixels", "glReadPixels"); |
---|
1702 | glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *)buf); |
---|
1703 | } |
---|
1704 | |
---|
1705 | void GLACanvas::PolygonOffset(bool on) const |
---|
1706 | { |
---|
1707 | if (on) { |
---|
1708 | glPolygonOffset(1.0, 1.0); |
---|
1709 | glEnable(GL_POLYGON_OFFSET_FILL); |
---|
1710 | } else { |
---|
1711 | glDisable(GL_POLYGON_OFFSET_FILL); |
---|
1712 | } |
---|
1713 | } |
---|