annotate Samples/Sdl/BasicScene.cpp @ 617:7efa2543699d

simplification
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 02 May 2019 18:21:59 +0200
parents 412a2d01a189
children 462a5074f914
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program 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 GNU
6129b1e5ba42 BasicScene SDL sample
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15 * Affero 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 Affero General Public License
6129b1e5ba42 BasicScene SDL sample
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 // From Stone
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23 #include "../../Applications/Sdl/SdlOpenGLWindow.h"
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24 #include "../../Framework/Scene2D/CairoCompositor.h"
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25 #include "../../Framework/Scene2D/ColorTextureSceneLayer.h"
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26 #include "../../Framework/Scene2D/OpenGLCompositor.h"
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27 #include "../../Framework/Scene2D/PanSceneTracker.h"
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28 #include "../../Framework/Scene2D/RotateSceneTracker.h"
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29 #include "../../Framework/Scene2D/Scene2D.h"
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30 #include "../../Framework/Scene2D/ZoomSceneTracker.h"
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31 #include "../../Framework/StoneInitialization.h"
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32
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33 // From Orthanc framework
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34 #include <Core/Logging.h>
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35 #include <Core/OrthancException.h>
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36 #include <Core/Images/Image.h>
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37 #include <Core/Images/ImageProcessing.h>
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38 #include <Core/Images/PngWriter.h>
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39
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40 #include <SDL.h>
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41 #include <stdio.h>
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42
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43 static const unsigned int FONT_SIZE = 32;
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44 static const int LAYER_POSITION = 150;
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46
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47 void PrepareScene(OrthancStone::Scene2D& scene)
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48 {
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49 using namespace OrthancStone;
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50
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51 // Texture of 2x2 size
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52 {
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53 Orthanc::Image i(Orthanc::PixelFormat_RGB24, 2, 2, false);
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54
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55 uint8_t *p = reinterpret_cast<uint8_t*>(i.GetRow(0));
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56 p[0] = 255;
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57 p[1] = 0;
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58 p[2] = 0;
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59
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60 p[3] = 0;
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61 p[4] = 255;
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62 p[5] = 0;
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63
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64 p = reinterpret_cast<uint8_t*>(i.GetRow(1));
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65 p[0] = 0;
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66 p[1] = 0;
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67 p[2] = 255;
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68
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69 p[3] = 255;
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70 p[4] = 0;
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71 p[5] = 0;
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72
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73 scene.SetLayer(12, new ColorTextureSceneLayer(i));
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74
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75 std::auto_ptr<ColorTextureSceneLayer> l(new ColorTextureSceneLayer(i));
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76 l->SetOrigin(-3, 2);
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77 l->SetPixelSpacing(1.5, 1);
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78 l->SetAngle(20.0 / 180.0 * M_PI);
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79 scene.SetLayer(14, l.release());
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80 }
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81
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82 // Texture of 1x1 size
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83 {
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84 Orthanc::Image i(Orthanc::PixelFormat_RGB24, 1, 1, false);
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85
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86 uint8_t *p = reinterpret_cast<uint8_t*>(i.GetRow(0));
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87 p[0] = 255;
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88 p[1] = 0;
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89 p[2] = 0;
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90
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91 std::auto_ptr<ColorTextureSceneLayer> l(new ColorTextureSceneLayer(i));
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92 l->SetOrigin(-2, 1);
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93 l->SetAngle(20.0 / 180.0 * M_PI);
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94 scene.SetLayer(13, l.release());
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95 }
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96
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97 // Some lines
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98 {
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99 std::auto_ptr<PolylineSceneLayer> layer(new PolylineSceneLayer);
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100
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101 layer->SetThickness(1);
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102
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103 PolylineSceneLayer::Chain chain;
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104 chain.push_back(ScenePoint2D(0 - 0.5, 0 - 0.5));
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105 chain.push_back(ScenePoint2D(0 - 0.5, 2 - 0.5));
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106 chain.push_back(ScenePoint2D(2 - 0.5, 2 - 0.5));
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107 chain.push_back(ScenePoint2D(2 - 0.5, 0 - 0.5));
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108 layer->AddChain(chain, true);
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109
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110 chain.clear();
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111 chain.push_back(ScenePoint2D(-5, -5));
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112 chain.push_back(ScenePoint2D(5, -5));
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113 chain.push_back(ScenePoint2D(5, 5));
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114 chain.push_back(ScenePoint2D(-5, 5));
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115 layer->AddChain(chain, true);
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116
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117 double dy = 1.01;
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118 chain.clear();
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119 chain.push_back(ScenePoint2D(-4, -4));
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120 chain.push_back(ScenePoint2D(4, -4 + dy));
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121 chain.push_back(ScenePoint2D(-4, -4 + 2.0 * dy));
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122 chain.push_back(ScenePoint2D(4, 2));
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123 layer->AddChain(chain, false);
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124
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125 layer->SetColor(0,255, 255);
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126 scene.SetLayer(50, layer.release());
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127 }
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128
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129 // Some text
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130 {
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131 std::auto_ptr<TextSceneLayer> layer(new TextSceneLayer);
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132 layer->SetText("Hello");
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133 scene.SetLayer(100, layer.release());
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134 }
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135 }
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136
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137
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138 void TakeScreenshot(const std::string& target,
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139 const OrthancStone::Scene2D& scene,
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140 unsigned int canvasWidth,
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141 unsigned int canvasHeight)
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142 {
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143 // Take a screenshot, then save it as PNG file
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144 OrthancStone::CairoCompositor compositor(scene, canvasWidth, canvasHeight);
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145 compositor.SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT, FONT_SIZE, Orthanc::Encoding_Latin1);
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146 compositor.Refresh();
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147
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148 Orthanc::ImageAccessor canvas;
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149 compositor.GetCanvas().GetReadOnlyAccessor(canvas);
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150
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151 Orthanc::Image png(Orthanc::PixelFormat_RGB24, canvas.GetWidth(), canvas.GetHeight(), false);
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152 Orthanc::ImageProcessing::Convert(png, canvas);
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153
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154 Orthanc::PngWriter writer;
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155 writer.WriteToFile(target, png);
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156 }
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157
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158
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159 void HandleApplicationEvent(OrthancStone::Scene2D& scene,
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160 const OrthancStone::OpenGLCompositor& compositor,
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161 const SDL_Event& event,
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162 std::auto_ptr<OrthancStone::IPointerTracker>& activeTracker)
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163 {
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164 if (event.type == SDL_MOUSEMOTION)
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165 {
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166 int scancodeCount = 0;
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167 const uint8_t* keyboardState = SDL_GetKeyboardState(&scancodeCount);
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168
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169 if (activeTracker.get() == NULL &&
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170 SDL_SCANCODE_LCTRL < scancodeCount &&
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171 keyboardState[SDL_SCANCODE_LCTRL])
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172 {
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173 // The "left-ctrl" key is down, while no tracker is present
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174
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175 OrthancStone::PointerEvent e;
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176 e.AddPosition(compositor.GetPixelCenterCoordinates(event.button.x, event.button.y));
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177
602
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178 OrthancStone::ScenePoint2D p = e.GetMainPosition().Apply(scene.GetCanvasToSceneTransform());
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179
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180 char buf[64];
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181 sprintf(buf, "(%0.02f,%0.02f)", p.GetX(), p.GetY());
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182
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183 if (scene.HasLayer(LAYER_POSITION))
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184 {
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185 OrthancStone::TextSceneLayer& layer =
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186 dynamic_cast<OrthancStone::TextSceneLayer&>(scene.GetLayer(LAYER_POSITION));
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187 layer.SetText(buf);
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188 layer.SetPosition(p.GetX(), p.GetY());
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189 }
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190 else
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191 {
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192 std::auto_ptr<OrthancStone::TextSceneLayer> layer(new OrthancStone::TextSceneLayer);
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193 layer->SetColor(0, 255, 0);
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194 layer->SetText(buf);
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195 layer->SetBorder(20);
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196 layer->SetAnchor(OrthancStone::BitmapAnchor_BottomCenter);
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197 layer->SetPosition(p.GetX(), p.GetY());
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198 scene.SetLayer(LAYER_POSITION, layer.release());
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199 }
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200 }
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201 else
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202 {
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203 scene.DeleteLayer(LAYER_POSITION);
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204 }
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205 }
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206 else if (event.type == SDL_MOUSEBUTTONDOWN)
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207 {
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208 OrthancStone::PointerEvent e;
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209 e.AddPosition(compositor.GetPixelCenterCoordinates(event.button.x, event.button.y));
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210
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211 switch (event.button.button)
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212 {
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213 case SDL_BUTTON_MIDDLE:
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214 activeTracker.reset(new OrthancStone::PanSceneTracker(scene, e));
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215 break;
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216
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217 case SDL_BUTTON_RIGHT:
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218 activeTracker.reset(new OrthancStone::ZoomSceneTracker(scene, e,
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219 compositor.GetCanvasHeight()));
600
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220 break;
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221
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222 case SDL_BUTTON_LEFT:
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223 activeTracker.reset(new OrthancStone::RotateSceneTracker(scene, e));
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224 break;
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225
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226 default:
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227 break;
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228 }
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229 }
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230 else if (event.type == SDL_KEYDOWN &&
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231 event.key.repeat == 0 /* Ignore key bounce */)
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232 {
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233 switch (event.key.keysym.sym)
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234 {
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235 case SDLK_s:
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236 scene.FitContent(compositor.GetCanvasWidth(),
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237 compositor.GetCanvasHeight());
600
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238 break;
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239
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240 case SDLK_c:
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241 TakeScreenshot("screenshot.png", scene,
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242 compositor.GetCanvasWidth(),
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243 compositor.GetCanvasHeight());
600
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244 break;
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245
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246 default:
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247 break;
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248 }
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249 }
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250 }
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251
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252
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253 static void GLAPIENTRY
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254 OpenGLMessageCallback(GLenum source,
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255 GLenum type,
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256 GLuint id,
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257 GLenum severity,
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258 GLsizei length,
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259 const GLchar* message,
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260 const void* userParam )
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261 {
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262 if (severity != GL_DEBUG_SEVERITY_NOTIFICATION)
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263 {
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264 fprintf(stderr, "GL CALLBACK: %s type = 0x%x, severity = 0x%x, message = %s\n",
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265 ( type == GL_DEBUG_TYPE_ERROR ? "** GL ERROR **" : "" ),
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266 type, severity, message );
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267 }
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268 }
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269
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270
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271 void Run(OrthancStone::Scene2D& scene)
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272 {
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273 OrthancStone::SdlOpenGLWindow window("Hello", 1024, 768);
611
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274
600
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275 scene.FitContent(window.GetCanvasWidth(), window.GetCanvasHeight());
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276
600
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277 glEnable(GL_DEBUG_OUTPUT);
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412a2d01a189 automatic initialization of glew
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278 glDebugMessageCallback(OpenGLMessageCallback, 0);
600
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279
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280 OrthancStone::OpenGLCompositor compositor(window, scene);
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281 compositor.SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT,
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282 FONT_SIZE, Orthanc::Encoding_Latin1);
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283
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284 std::auto_ptr<OrthancStone::IPointerTracker> tracker;
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285
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286 bool stop = false;
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287 while (!stop)
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288 {
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289 compositor.Refresh();
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290
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291 SDL_Event event;
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292 while (!stop &&
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293 SDL_PollEvent(&event))
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294 {
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295 if (event.type == SDL_QUIT)
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296 {
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297 stop = true;
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298 break;
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299 }
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300 else if (event.type == SDL_MOUSEMOTION)
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301 {
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302 if (tracker.get() != NULL)
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303 {
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304 OrthancStone::PointerEvent e;
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305 e.AddPosition(compositor.GetPixelCenterCoordinates(event.button.x, event.button.y));
600
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306 tracker->Update(e);
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307 }
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308 }
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309 else if (event.type == SDL_MOUSEBUTTONUP)
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310 {
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311 if (tracker.get() != NULL)
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312 {
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313 tracker->Release();
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314 tracker.reset(NULL);
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315 }
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316 }
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317 else if (event.type == SDL_WINDOWEVENT &&
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318 event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED)
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319 {
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320 tracker.reset(NULL);
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321 compositor.UpdateSize();
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322 }
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323 else if (event.type == SDL_KEYDOWN &&
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324 event.key.repeat == 0 /* Ignore key bounce */)
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325 {
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326 switch (event.key.keysym.sym)
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327 {
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328 case SDLK_f:
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329 window.GetWindow().ToggleMaximize();
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330 break;
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331
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332 case SDLK_q:
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333 stop = true;
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334 break;
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335
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336 default:
6129b1e5ba42 BasicScene SDL sample
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337 break;
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338 }
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339 }
602
03c4b998fcd0 display scene positions in the basic sample
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340
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341 HandleApplicationEvent(scene, compositor, event, tracker);
600
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342 }
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343
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344 SDL_Delay(1);
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345 }
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346 }
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347
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348
607
f4b37a991dac using glew to build on Windows
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349
f4b37a991dac using glew to build on Windows
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350
f4b37a991dac using glew to build on Windows
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351 /**
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352 * IMPORTANT: The full arguments to "main()" are needed for SDL on
f4b37a991dac using glew to build on Windows
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353 * Windows. Otherwise, one gets the linking error "undefined reference
f4b37a991dac using glew to build on Windows
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354 * to `SDL_main'". https://wiki.libsdl.org/FAQWindows
f4b37a991dac using glew to build on Windows
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355 **/
f4b37a991dac using glew to build on Windows
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356 int main(int argc, char* argv[])
600
6129b1e5ba42 BasicScene SDL sample
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357 {
610
0c4c0693b97c OrthancStone::StoneInitialize()
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358 OrthancStone::StoneInitialize();
613
412a2d01a189 automatic initialization of glew
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359 Orthanc::Logging::EnableInfoLevel(true);
600
6129b1e5ba42 BasicScene SDL sample
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360
6129b1e5ba42 BasicScene SDL sample
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361 try
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362 {
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363 OrthancStone::Scene2D scene;
6129b1e5ba42 BasicScene SDL sample
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364 PrepareScene(scene);
6129b1e5ba42 BasicScene SDL sample
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365 Run(scene);
6129b1e5ba42 BasicScene SDL sample
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366 }
6129b1e5ba42 BasicScene SDL sample
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367 catch (Orthanc::OrthancException& e)
6129b1e5ba42 BasicScene SDL sample
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368 {
6129b1e5ba42 BasicScene SDL sample
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369 LOG(ERROR) << "EXCEPTION: " << e.What();
6129b1e5ba42 BasicScene SDL sample
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370 }
6129b1e5ba42 BasicScene SDL sample
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371
610
0c4c0693b97c OrthancStone::StoneInitialize()
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372 OrthancStone::StoneFinalize();
600
6129b1e5ba42 BasicScene SDL sample
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373
6129b1e5ba42 BasicScene SDL sample
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374 return 0;
6129b1e5ba42 BasicScene SDL sample
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375 }