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annotate OrthancStone/Sources/Scene2D/Internals/OpenGLBasicPolylineRenderer.cpp @ 1962:c6272d7bb6d9

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display of orientation markers in Stone Web viewer
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 27 Oct 2022 19:12:29 +0200
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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) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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22
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23
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24 #include "OpenGLBasicPolylineRenderer.h"
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25
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26 #include "../../OpenGL/OpenGLIncludes.h"
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27
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28 namespace OrthancStone
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29 {
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30 namespace Internals
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31 {
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32 OpenGLBasicPolylineRenderer::OpenGLBasicPolylineRenderer(OpenGL::IOpenGLContext& context,
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33 const PolylineSceneLayer& layer) :
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34 context_(context)
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35 {
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36 layer_.Copy(layer);
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37 }
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38
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39 void OpenGLBasicPolylineRenderer::Render(const AffineTransform2D& transform,
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40 unsigned int canvasWidth,
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41 unsigned int canvasHeight)
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42 {
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43 if (!context_.IsContextLost())
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44 {
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45 AffineTransform2D t = AffineTransform2D::Combine(
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46 AffineTransform2D::CreateOpenGLClipspace(canvasWidth, canvasHeight),
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47 transform);
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48
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49 glUseProgram(0);
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50
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51 glBegin(GL_LINES);
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52
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53 for (size_t i = 0; i < layer_.GetChainsCount(); i++)
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54 {
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55 const Color& color = layer_.GetColor(i);
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56 glColor3ub(color.GetRed(), color.GetGreen(), color.GetBlue());
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57
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58 const PolylineSceneLayer::Chain& chain = layer_.GetChain(i);
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59
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60 if (chain.size() > 1)
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61 {
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62 ScenePoint2D previous = chain[0].Apply(t);
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63
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64 for (size_t j = 1; j < chain.size(); j++)
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65 {
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66 ScenePoint2D p = chain[j].Apply(t);
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67
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68 glVertex2f(static_cast<GLfloat>(previous.GetX()),
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69 static_cast<GLfloat>(previous.GetY()));
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70 glVertex2f(static_cast<GLfloat>(p.GetX()),
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71 static_cast<GLfloat>(p.GetY()));
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72
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73 previous = p;
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74 }
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75
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76 if (layer_.IsClosedChain(i))
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77 {
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78 ScenePoint2D p = chain[0].Apply(t);
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79
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80 glVertex2f(static_cast<GLfloat>(previous.GetX()),
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81 static_cast<GLfloat>(previous.GetY()));
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82 glVertex2f(static_cast<GLfloat>(p.GetX()),
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83 static_cast<GLfloat>(p.GetY()));
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84 }
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85 }
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86 }
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87
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88 glEnd();
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89 }
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90 }
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91
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92
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93 void OpenGLBasicPolylineRenderer::Update(const ISceneLayer& layer)
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94 {
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95 layer_.Copy(dynamic_cast<const PolylineSceneLayer&>(layer));
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96 }
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97 }
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98 }