Mercurial > octave

annotate libgui/graphics/gl-select.cc @ 23070:bef714f45999

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maint: Use space after function name/before parenthesis in libgui. * Backend.cc, ButtonControl.cc, ButtonGroup.cc, Canvas.cc, Container.cc, EditControl.cc, GLCanvas.cc, ListBoxControl.cc, ListBoxControl.h, PopupMenuControl.cc, QtHandlesUtils.cc, TextControl.cc, TextEdit.h, annotation-dialog.cc, annotation-dialog.h, gl-select.cc, dialog.cc, files-dock-widget.cc, find-files-dialog.cc, history-dock-widget.cc, file-editor-tab.cc, file-editor.cc, file-editor.h, find-dialog.cc, marker.cc, octave-qscintilla.cc, octave-qscintilla.h, main-window.cc, octave-dock-widget.cc, octave-dock-widget.h, octave-gui.cc, parser.cc, parser.h, webinfo.cc, settings-dialog.cc, shortcut-manager.cc, welcome-wizard.cc, workspace-view.cc: Use space after function name and before parenthesis.
author Rik <rik@octave.org>
date Wed, 18 Jan 2017 17:36:36 -0800
parents 3a2b891d0b33
children ef4d915df748
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2
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3 Copyright (C) 2011-2016 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
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9 the Free Software Foundation; either version 3 of the License, or
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10 (at your 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
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13 WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License 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 (HAVE_CONFIG_H)
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24 # include "config.h"
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25 #endif
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26
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27 #include <iostream>
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28
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29 #include "gl-select.h"
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30
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31 namespace octave
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32 {
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33
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34 void
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35 opengl_selector::apply_pick_matrix (void)
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36 {
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37 GLdouble p_matrix[16];
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38 GLint viewport[4];
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39
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40 glGetDoublev (GL_PROJECTION_MATRIX, p_matrix);
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41 glGetIntegerv (GL_VIEWPORT, viewport);
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42 glMatrixMode (GL_PROJECTION);
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43 glLoadIdentity ();
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44 gluPickMatrix (xp, yp, size, size, viewport);
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45 glMultMatrixd (p_matrix);
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46 glMatrixMode (GL_MODELVIEW);
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47 }
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48
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49 void
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50 opengl_selector::setup_opengl_transformation (const axes::properties& props)
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51 {
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52 opengl_renderer::setup_opengl_transformation (props);
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53 apply_pick_matrix ();
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54 }
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55
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56 void
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57 opengl_selector::init_marker (const std::string& m, double sz, float width)
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58 {
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59 opengl_renderer::init_marker (m, sz, width);
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60 apply_pick_matrix ();
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61 }
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62
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63 # define BUFFER_SIZE 128
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64
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65 graphics_object
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66 opengl_selector::select (const graphics_object& ax, int x, int y, int flags)
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67 {
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68 glEnable (GL_DEPTH_TEST);
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69 glDepthFunc (GL_LEQUAL);
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70
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71 xp = x;
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72 yp = y;
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73
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74 GLuint select_buffer[BUFFER_SIZE];
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75
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76 glSelectBuffer (BUFFER_SIZE, select_buffer);
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77 glRenderMode (GL_SELECT);
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78 glInitNames ();
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79
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80 object_map.clear ();
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81
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82 draw (ax);
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83
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84 int hits = glRenderMode (GL_RENDER);
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85 graphics_object obj;
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86
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87 if (hits > 0)
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88 {
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89 GLuint current_minZ = 0xffffffff;
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90 GLuint current_name = 0xffffffff;
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91
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92 for (int i = 0, j = 0; i < hits && j < BUFFER_SIZE-3; i++)
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93 {
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94 GLuint n = select_buffer[j++],
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95 minZ = select_buffer[j++];
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96
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97 j++; // skip maxZ
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98 if (((flags & select_last) == 0 && (minZ <= current_minZ))
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99 || ((flags & select_last) != 0 && (minZ >= current_minZ)))
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100 {
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101 bool candidate = true;
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102 GLuint name =
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103 select_buffer[std::min (j + n, GLuint (BUFFER_SIZE)) - 1];
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104
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105 if ((flags & select_ignore_hittest) == 0)
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106 {
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107 graphics_object go = object_map[name];
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108
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109 if (! go.get_properties ().is_hittest ())
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110 candidate = false;
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111 }
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112
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113 if (candidate)
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114 {
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115 current_minZ = minZ;
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116 current_name = name;
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117 }
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118
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119 j += n;
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120 }
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121 else
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122 j += n;
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123 }
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124
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125 if (current_name != 0xffffffff)
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126 obj = object_map[current_name];
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127 }
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128 else if (hits < 0)
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129 warning ("opengl_selector::select: selection buffer overflow");
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130
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131 object_map.clear ();
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132
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133 return obj;
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134 }
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135
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136 void
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137 opengl_selector::draw (const graphics_object& go, bool toplevel)
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138 {
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139 GLuint name = object_map.size ();
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140
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141 object_map[name] = go;
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142 glPushName (name);
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143 opengl_renderer::draw (go, toplevel);
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144 glPopName ();
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145 }
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146
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147 void
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148 opengl_selector::fake_text (double x, double y, double z, const Matrix& bbox,
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149 bool use_scale)
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150 {
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151 ColumnVector xpos, xp1, xp2;
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152
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153 xpos = get_transform ().transform (x, y, z, use_scale);
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154
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155 xp1 = xp2 = xpos;
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156 xp1(0) += bbox(0);
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157 xp1(1) -= bbox(1);
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158 xp2(0) += (bbox(0) + bbox(2));
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159 xp2(1) -= (bbox(1) + bbox(3));
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160
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161 ColumnVector p1, p2, p3, p4;
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162
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163 p1 = get_transform ().untransform (xp1(0), xp1(1), xp1(2), false);
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164 p2 = get_transform ().untransform (xp2(0), xp1(1), xp1(2), false);
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165 p3 = get_transform ().untransform (xp2(0), xp2(1), xp1(2), false);
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166 p4 = get_transform ().untransform (xp1(0), xp2(1), xp1(2), false);
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167
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168 glBegin (GL_QUADS);
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169 glVertex3dv (p1.data ());
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170 glVertex3dv (p2.data ());
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171 glVertex3dv (p3.data ());
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172 glVertex3dv (p4.data ());
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173 glEnd ();
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174 }
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175
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176 void
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177 opengl_selector::draw_text (const text::properties& props)
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178 {
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179 if (props.get_string ().is_empty ())
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180 return;
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181
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182 Matrix pos = props.get_data_position ();
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183 const Matrix bbox = props.get_extent_matrix ();
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184
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185 fake_text (pos(0), pos(1), pos.numel () > 2 ? pos(2) : 0.0, bbox);
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186 }
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187
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188 Matrix
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189 opengl_selector::render_text (const std::string& txt,
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190 double x, double y, double z,
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191 int halign, int valign, double rotation)
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192 {
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193 uint8NDArray pixels;
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194 Matrix bbox (1, 4, 0.0);
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195
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196 // FIXME: probably more efficient to only compute bbox instead
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197 // of doing full text rendering...
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198 text_to_pixels (txt, pixels, bbox, halign, valign, rotation);
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199 fake_text (x, y, z, bbox, false);
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200
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201 return bbox;
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202 }
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203
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204 void
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205 opengl_selector::draw_image (const image::properties& props)
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206 {
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207 Matrix xd = props.get_xdata ().matrix_value ();
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208 octave_idx_type nc = props.get_cdata ().columns ();
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209 double x_pix_size = (nc == 1 ? 1 : (xd(1) - xd(0)) / (nc - 1));
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210
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211 Matrix yd = props.get_ydata ().matrix_value ();
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212 octave_idx_type nr = props.get_cdata ().rows ();
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213 double y_pix_size = (nr == 1 ? 1 : (yd(1) - yd(0)) / (nr - 1));
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214
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215 ColumnVector p1(3, 0.0), p2(3, 0.0), p3(3, 0.0), p4(3, 0.0);
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216 p1(0) = xd(0) - x_pix_size/2;
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217 p1(1) = yd(0) - y_pix_size/2;
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218
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219 p2(0) = xd(1) + x_pix_size/2;
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220 p2(1) = yd(0) - y_pix_size/2;
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221
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222 p3(0) = xd(1) + x_pix_size/2;
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223 p3(1) = yd(1) + y_pix_size/2;
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224
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225 p4(0) = xd(0) - x_pix_size/2;
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226 p4(1) = yd(1) + y_pix_size/2;
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227
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228 glBegin (GL_QUADS);
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229 glVertex3dv (p1.data ());
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230 glVertex3dv (p2.data ());
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231 glVertex3dv (p3.data ());
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232 glVertex3dv (p4.data ());
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233 glEnd ();
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234 }
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235
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236 }
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237