Mercurial > hg > orthanc-stone

annotate OrthancStone/Sources/Volumes/VolumeSceneLayerSource.cpp @ 1685:7896aac14587

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Protected against usage of dying viewport
author Benjamin Golinvaux <bgo@osimis.io>
date Wed, 25 Nov 2020 12:16:53 +0100
parents 52b8b96cb55f
children 9ac2a65d4172
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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) 2017-2020 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 Lesser 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
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15 * Lesser 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 Lesser General Public
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18 * License along with this program. 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 #include "VolumeSceneLayerSource.h"
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24
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25 #include "../Scene2D/NullLayer.h"
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26 #include "../Viewport/IViewport.h"
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27 #include "../StoneException.h"
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28 #include "../Scene2DViewport/ViewportController.h"
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29
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30 #include <OrthancException.h>
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31
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32 namespace OrthancStone
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33 {
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34 static bool IsSameCuttingPlane(const CoordinateSystem3D& a,
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35 const CoordinateSystem3D& b)
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36 {
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37 // TODO - What if the normal is reversed?
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38 double distance;
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39 return (CoordinateSystem3D::ComputeDistance(distance, a, b) &&
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40 LinearAlgebra::IsCloseToZero(distance));
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41 }
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42
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43 void VolumeSceneLayerSource::ClearLayer()
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44 {
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45 {
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46 std::unique_ptr<IViewport::ILock> lock(GetViewportLock());
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47 ViewportController& controller = lock->GetController();
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48 Scene2D& scene = controller.GetScene();
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49 scene.DeleteLayer(layerDepth_);
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50 }
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51 lastPlane_.reset(NULL);
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52 }
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53
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54 IViewport::ILock* VolumeSceneLayerSource::GetViewportLock()
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55 {
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56 boost::shared_ptr<IViewport> viewport = viewport_.lock();
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57 if (viewport)
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58 return viewport->Lock();
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59 else
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60 return NULL;
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61 }
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62
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63 IViewport::ILock* VolumeSceneLayerSource::GetViewportLock() const
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64 {
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65 boost::shared_ptr<IViewport> viewport = viewport_.lock();
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66 if (viewport)
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67 return viewport->Lock();
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68 else
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69 return NULL;
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70 }
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71
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72
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73 VolumeSceneLayerSource::VolumeSceneLayerSource(boost::weak_ptr<IViewport> viewport,
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74 int layerDepth,
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75 const boost::shared_ptr<IVolumeSlicer>& slicer) :
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76 viewport_(viewport),
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77 layerDepth_(layerDepth),
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78 slicer_(slicer),
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79 lastRevision_(0),
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80 lastConfiguratorRevision_(0)
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81 {
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82 if (slicer == NULL)
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83 {
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84 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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85 }
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86
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87 {
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88 std::unique_ptr<IViewport::ILock> lock(GetViewportLock());
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89 ViewportController& controller = lock->GetController();
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90 Scene2D& scene = controller.GetScene();
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91 ORTHANC_ASSERT(!scene.HasLayer(layerDepth_));
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92
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93 // we need to book the scene layer depth by adding a dummy layer
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94 std::unique_ptr<NullLayer> nullLayer(new NullLayer);
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95 scene.SetLayer(layerDepth_,nullLayer.release());
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96 }
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97 }
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98
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99 VolumeSceneLayerSource::~VolumeSceneLayerSource()
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100 {
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101 ClearLayer();
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102 }
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103
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104 void VolumeSceneLayerSource::RemoveConfigurator()
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105 {
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106 configurator_.reset();
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107 lastPlane_.reset();
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108 }
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109
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110
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111 void VolumeSceneLayerSource::SetConfigurator(ILayerStyleConfigurator* configurator) // Takes ownership
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112 {
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113 if (configurator == NULL)
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114 {
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115 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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116 }
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117
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118 configurator_.reset(configurator);
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119
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120 // Invalidate the layer
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121 lastPlane_.reset(NULL);
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122 }
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123
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124
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125 ILayerStyleConfigurator& VolumeSceneLayerSource::GetConfigurator() const
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126 {
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127 if (configurator_.get() == NULL)
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128 {
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129 LOG(ERROR) << "VolumeSceneLayerSource::GetConfigurator(): (configurator_.get() == NULL)";
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130 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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131 }
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132
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133 return *configurator_;
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134 }
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135
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136
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137 void VolumeSceneLayerSource::Update(const CoordinateSystem3D& plane)
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138 {
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139 std::unique_ptr<IViewport::ILock> lock(GetViewportLock());
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140 if(lock)
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141 {
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142 ViewportController& controller = lock->GetController();
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143 Scene2D& scene = controller.GetScene();
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144
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145 assert(slicer_.get() != NULL);
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146 std::unique_ptr<IVolumeSlicer::IExtractedSlice> slice(slicer_->ExtractSlice(plane));
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147
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148 if (slice.get() == NULL)
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149 {
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150 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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151 }
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152
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153 if (!slice->IsValid())
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154 {
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155 // The slicer cannot handle this cutting plane: Clear the layer
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156 ClearLayer();
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157 }
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158 else if (lastPlane_.get() != NULL &&
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159 IsSameCuttingPlane(*lastPlane_, plane) &&
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160 lastRevision_ == slice->GetRevision())
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161 {
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162 // The content of the slice has not changed: Don't update the
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163 // layer content, but possibly update its style
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164
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165 if (configurator_.get() != NULL &&
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166 configurator_->GetRevision() != lastConfiguratorRevision_ &&
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167 scene.HasLayer(layerDepth_))
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168 {
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169 configurator_->ApplyStyle(scene.GetLayer(layerDepth_));
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170 }
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171 }
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172 else
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173 {
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174 LOG(TRACE) << "VolumeSceneLayerSource::Update -- Content has changed: An update is needed";
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175 // Content has changed: An update is needed
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176 lastPlane_.reset(new CoordinateSystem3D(plane));
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177 lastRevision_ = slice->GetRevision();
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178
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179 std::unique_ptr<ISceneLayer> layer(slice->CreateSceneLayer(configurator_.get(), plane));
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180 if (layer.get() == NULL)
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181 {
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182 LOG(TRACE) << "VolumeSceneLayerSource::Update -- (layer.get() == NULL)";
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183 ClearLayer();
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184 }
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185 else
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186 {
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187 LOG(TRACE) << "VolumeSceneLayerSource::Update -- (layer.get() != NULL)";
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188 if (configurator_.get() != NULL)
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189 {
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190 lastConfiguratorRevision_ = configurator_->GetRevision();
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191 configurator_->ApplyStyle(*layer);
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192 }
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193
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194 scene.SetLayer(layerDepth_, layer.release());
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195 }
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196 }
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197 }
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198 }
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199 }