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annotate libinterp/corefcn/gl-render.h @ 21195:53ac24e210e4

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* gl-render.h (opengl_renderer:set_interpreter): Pass argument by const reference.
author John W. Eaton <jwe@octave.org>
date Thu, 04 Feb 2016 16:02:44 -0500
parents 4a04de049ff9
children bd96c2efd4fe
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1 /*
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2
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3 Copyright (C) 2008-2015 Michael Goffioul
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if ! defined (octave_gl_render_h)
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24 #define octave_gl_render_h 1
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26 #ifdef HAVE_WINDOWS_H
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27 #define WIN32_LEAN_AND_MEAN
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28 #include <windows.h>
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29 #endif
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30
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31 #ifdef HAVE_GL_GL_H
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32 #include <GL/gl.h>
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33 #elif defined HAVE_OPENGL_GL_H || defined HAVE_FRAMEWORK_OPENGL
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34 #include <OpenGL/gl.h>
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35 #endif
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36
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37 #ifdef HAVE_GL_GLU_H
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38 #include <GL/glu.h>
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39 #elif defined HAVE_OPENGL_GLU_H || defined HAVE_FRAMEWORK_OPENGL
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40 #include <OpenGL/glu.h>
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41 #endif
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42
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43 #ifdef HAVE_GL_GLEXT_H
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44 #include <GL/glext.h>
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45 #elif defined HAVE_OPENGL_GLEXT_H || defined HAVE_FRAMEWORK_OPENGL
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46 #include <OpenGL/glext.h>
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47 #endif
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48
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49 #include "graphics.h"
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50 #include "txt-eng-ft.h"
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51
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52 #if defined (HAVE_OPENGL)
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53
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54 class
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55 OCTINTERP_API
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56 opengl_renderer
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57 {
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58 public:
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59 opengl_renderer (void)
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60 : toolkit (), xform (), xmin (), xmax (), ymin (), ymax (),
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61 zmin (), zmax (), xZ1 (), xZ2 (), marker_id (), filled_marker_id (),
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62 camera_pos (), camera_dir (), interpreter ("none")
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63 #if HAVE_FREETYPE
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64 , text_renderer ()
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65 #endif
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66 { }
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67
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68 virtual ~opengl_renderer (void) { }
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69
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70 virtual void draw (const graphics_object& go, bool toplevel = true);
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71
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72 virtual void draw (const Matrix& hlist, bool toplevel = false)
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73 {
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74 int len = hlist.numel ();
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75
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76 for (int i = len-1; i >= 0; i--)
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77 {
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78 graphics_object obj = gh_manager::get_object (hlist(i));
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79
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80 if (obj)
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81 draw (obj, toplevel);
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82 }
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83 }
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84
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85 virtual void set_viewport (int w, int h);
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86 virtual graphics_xform get_transform (void) const { return xform; }
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87
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88 protected:
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89 virtual void draw_figure (const figure::properties& props);
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90 virtual void draw_axes (const axes::properties& props);
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91 virtual void draw_line (const line::properties& props);
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92 virtual void draw_surface (const surface::properties& props);
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93 virtual void draw_patch (const patch::properties& props);
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94 virtual void draw_hggroup (const hggroup::properties& props);
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95 virtual void draw_text (const text::properties& props);
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96 virtual void draw_image (const image::properties& props);
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97 virtual void draw_uipanel (const uipanel::properties& props,
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98 const graphics_object& go);
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99
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100 virtual void init_gl_context (bool enhanced, const Matrix& backgroundColor);
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101 virtual void setup_opengl_transformation (const axes::properties& props);
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102
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103 virtual void set_color (const Matrix& c);
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104 virtual void set_polygon_offset (bool on, float offset = 0.0f);
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105 virtual void set_linewidth (float w);
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106 virtual void set_linestyle (const std::string& s, bool stipple = false);
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107 virtual void set_clipbox (double x1, double x2, double y1, double y2,
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108 double z1, double z2);
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109 virtual void set_clipping (bool on);
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110 virtual void set_font (const base_properties& props);
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111 virtual void set_interpreter (const caseless_str& interp)
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112 {
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113 interpreter = interp;
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114 }
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115
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116 virtual void init_marker (const std::string& m, double size, float width);
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117 virtual void end_marker (void);
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118 virtual void draw_marker (double x, double y, double z,
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119 const Matrix& lc, const Matrix& fc);
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120
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121 virtual void text_to_pixels (const std::string& txt,
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122 uint8NDArray& pixels,
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123 Matrix& bbox,
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124 int halign = 0, int valign = 0,
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125 double rotation = 0.0);
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126
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127 virtual void text_to_strlist (const std::string& txt,
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128 std::list<ft_render::ft_string>& lst,
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129 Matrix& bbox,
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130 int halign = 0, int valign = 0,
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131 double rotation = 0.0);
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132
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133 virtual Matrix render_text (const std::string& txt,
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134 double x, double y, double z,
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135 int halign, int valign, double rotation = 0.0);
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136
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137 virtual void draw_pixels (GLsizei w, GLsizei h, GLenum format,
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138 GLenum type, const GLvoid *data);
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139
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140 virtual void render_grid (const std::string& gridstyle, const Matrix& ticks,
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141 double lim1, double lim2,
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142 double p1, double p1N, double p2, double p2N,
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143 int xyz, bool is_3D);
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144
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145 virtual void render_tickmarks (const Matrix& ticks, double lim1, double lim2,
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146 double p1, double p1N, double p2, double p2N,
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147 double dx, double dy, double dz,
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148 int xyz, bool doubleside);
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149
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150 virtual void render_ticktexts (const Matrix& ticks,
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151 const string_vector& ticklabels,
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152 double lim1, double lim2,
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153 double p1, double p2,
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154 int xyz, int ha, int va,
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155 int& wmax, int& hmax);
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156
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157 private:
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158
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159 // No copying!
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160
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161 opengl_renderer (const opengl_renderer&);
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162
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163 opengl_renderer& operator = (const opengl_renderer&);
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164
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165 bool is_nan_or_inf (double x, double y, double z) const
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166 {
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167 return (xisnan (x) || xisnan (y) || xisnan (z)
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168 || xisinf (x) || xisinf (y) || xisinf (z));
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169 }
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170
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171 octave_uint8 clip_code (double x, double y, double z) const
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172 {
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173 return ((x < xmin ? 1 : 0)
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174 | (x > xmax ? 1 : 0) << 1
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175 | (y < ymin ? 1 : 0) << 2
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176 | (y > ymax ? 1 : 0) << 3
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177 | (z < zmin ? 1 : 0) << 4
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178 | (z > zmax ? 1 : 0) << 5
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179 | (is_nan_or_inf (x, y, z) ? 0 : 1) << 6);
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180 }
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181
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182 unsigned int make_marker_list (const std::string& m, double size,
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183 bool filled) const;
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184
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185 void draw_axes_planes (const axes::properties& props);
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186 void draw_axes_boxes (const axes::properties& props);
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187
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188 void draw_axes_x_grid (const axes::properties& props);
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189 void draw_axes_y_grid (const axes::properties& props);
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190 void draw_axes_z_grid (const axes::properties& props);
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191
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192 void draw_axes_children (const axes::properties& props);
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193
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194 private:
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195 // The graphics toolkit associated with the figure being rendered.
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196 graphics_toolkit toolkit;
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197
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198 // axes transformation data
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199 graphics_xform xform;
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200
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201 // axis limits in model scaled coordinate
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202 double xmin, xmax;
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203 double ymin, ymax;
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204 double zmin, zmax;
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205
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206 // Z projection limits in windows coordinate
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207 double xZ1, xZ2;
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208
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209 // call lists identifiers for markers
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210 unsigned int marker_id, filled_marker_id;
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211
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212 // camera information for primitive sorting
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213 ColumnVector camera_pos, camera_dir;
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214
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215 // interpreter to be used by text_to_pixels
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216 caseless_str interpreter;
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217
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218 #if HAVE_FREETYPE
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219 // FreeType render, used for text rendering
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220 ft_render text_renderer;
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221 #endif
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222
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223 private:
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224 class patch_tesselator;
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225 };
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226
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227 #endif
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228
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229 #endif