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Add auto-tests for 3D scene rendering using the off-screen 3D engine
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/*************************************************************************** | ||
testqgs3drendering.cpp | ||
-------------------------------------- | ||
Date : July 2018 | ||
Copyright : (C) 2018 by Martin Dobias | ||
Email : wonder dot sk at gmail dot com | ||
*************************************************************************** | ||
* * | ||
* This program is free software; you can redistribute it and/or modify * | ||
* it under the terms of the GNU General Public License as published by * | ||
* the Free Software Foundation; either version 2 of the License, or * | ||
* (at your option) any later version. * | ||
* * | ||
***************************************************************************/ | ||
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#include "qgstest.h" | ||
#include "qgsrenderchecker.h" | ||
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#include "qgsproject.h" | ||
#include "qgsrasterlayer.h" | ||
#include "qgsvectorlayer.h" | ||
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#include "qgs3dmapscene.h" | ||
#include "qgs3dmapsettings.h" | ||
#include "qgs3dutils.h" | ||
#include "qgscameracontroller.h" | ||
#include "qgschunknode_p.h" | ||
#include "qgsdemterraingenerator.h" | ||
#include "qgsflatterraingenerator.h" | ||
#include "qgsoffscreen3dengine.h" | ||
#include "qgspolygon3dsymbol.h" | ||
#include "qgsterrainentity_p.h" | ||
#include "qgsvectorlayer3drenderer.h" | ||
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class TestQgs3DRendering : public QObject | ||
{ | ||
Q_OBJECT | ||
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private slots: | ||
void initTestCase();// will be called before the first testfunction is executed. | ||
void cleanupTestCase();// will be called after the last testfunction was executed. | ||
void testFlatTerrain(); | ||
void testDemTerrain(); | ||
void testExtrudedPolygons(); | ||
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private: | ||
bool renderCheck( const QString &testName, QImage &image, int mismatchCount = 0 ); | ||
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QString mReport; | ||
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std::unique_ptr<QgsProject> mProject; | ||
QgsRasterLayer *mLayerDtm; | ||
QgsRasterLayer *mLayerRgb; | ||
QgsVectorLayer *mLayerBuildings; | ||
}; | ||
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//runs before all tests | ||
void TestQgs3DRendering::initTestCase() | ||
{ | ||
// init QGIS's paths - true means that all path will be inited from prefix | ||
QgsApplication::init(); | ||
QgsApplication::initQgis(); | ||
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mReport = QStringLiteral( "<h1>3D Rendering Tests</h1>\n" ); | ||
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mProject.reset( new QgsProject ); | ||
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QString dataDir( TEST_DATA_DIR ); | ||
mLayerDtm = new QgsRasterLayer( dataDir + "/3d/dtm.tif", "dtm", "gdal" ); | ||
QVERIFY( mLayerDtm->isValid() ); | ||
mProject->addMapLayer( mLayerDtm ); | ||
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mLayerRgb = new QgsRasterLayer( dataDir + "/3d/rgb.tif", "rgb", "gdal" ); | ||
QVERIFY( mLayerRgb->isValid() ); | ||
mProject->addMapLayer( mLayerRgb ); | ||
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mLayerBuildings = new QgsVectorLayer( dataDir + "/3d/buildings.shp", "buildings", "ogr" ); | ||
QVERIFY( mLayerBuildings->isValid() ); | ||
mProject->addMapLayer( mLayerBuildings ); | ||
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QgsPhongMaterialSettings material; | ||
material.setAmbient( Qt::lightGray ); | ||
QgsPolygon3DSymbol *symbol3d = new QgsPolygon3DSymbol; | ||
symbol3d->setMaterial( material ); | ||
symbol3d->setExtrusionHeight( 10.f ); | ||
QgsVectorLayer3DRenderer *renderer3d = new QgsVectorLayer3DRenderer( symbol3d ); | ||
mLayerBuildings->setRenderer3D( renderer3d ); | ||
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mProject->setCrs( mLayerDtm->crs() ); | ||
} | ||
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//runs after all tests | ||
void TestQgs3DRendering::cleanupTestCase() | ||
{ | ||
mProject.reset(); | ||
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QString myReportFile = QDir::tempPath() + "/qgistest.html"; | ||
QFile myFile( myReportFile ); | ||
if ( myFile.open( QIODevice::WriteOnly | QIODevice::Append ) ) | ||
{ | ||
QTextStream myQTextStream( &myFile ); | ||
myQTextStream << mReport; | ||
myFile.close(); | ||
} | ||
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QgsApplication::exitQgis(); | ||
} | ||
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void TestQgs3DRendering::testFlatTerrain() | ||
{ | ||
QgsRectangle fullExtent = mLayerDtm->extent(); | ||
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Qgs3DMapSettings *map = new Qgs3DMapSettings; | ||
map->setCrs( mProject->crs() ); | ||
map->setOrigin( QgsVector3D( fullExtent.center().x(), fullExtent.center().y(), 0 ) ); | ||
map->setLayers( QList<QgsMapLayer *>() << mLayerRgb ); | ||
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QgsFlatTerrainGenerator *flatTerrain = new QgsFlatTerrainGenerator; | ||
flatTerrain->setCrs( map->crs() ); | ||
flatTerrain->setExtent( fullExtent ); | ||
map->setTerrainGenerator( flatTerrain ); | ||
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QgsOffscreen3DEngine engine; | ||
Qgs3DMapScene *scene = new Qgs3DMapScene( *map, &engine ); | ||
engine.setRootEntity( scene ); | ||
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// look from the top | ||
scene->cameraController()->setLookingAtPoint( QgsVector3D( 0, 0, 0 ), 2500, 0, 0 ); | ||
QImage img = Qgs3DUtils::captureSceneImage( engine, scene ); | ||
QVERIFY( renderCheck( "flat_terrain_1", img, 40 ) ); | ||
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// tilted view (pitch = 60 degrees) | ||
scene->cameraController()->setLookingAtPoint( QgsVector3D( 0, 0, 0 ), 2500, 60, 0 ); | ||
QImage img2 = Qgs3DUtils::captureSceneImage( engine, scene ); | ||
QVERIFY( renderCheck( "flat_terrain_2", img2, 40 ) ); | ||
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// also add horizontal rotation (yaw = 45 degrees) | ||
scene->cameraController()->setLookingAtPoint( QgsVector3D( 0, 0, 0 ), 2500, 60, 45 ); | ||
QImage img3 = Qgs3DUtils::captureSceneImage( engine, scene ); | ||
QVERIFY( renderCheck( "flat_terrain_3", img3, 40 ) ); | ||
} | ||
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void TestQgs3DRendering::testDemTerrain() | ||
{ | ||
QgsRectangle fullExtent = mLayerDtm->extent(); | ||
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Qgs3DMapSettings *map = new Qgs3DMapSettings; | ||
map->setCrs( mProject->crs() ); | ||
map->setOrigin( QgsVector3D( fullExtent.center().x(), fullExtent.center().y(), 0 ) ); | ||
map->setLayers( QList<QgsMapLayer *>() << mLayerRgb ); | ||
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QgsDemTerrainGenerator *demTerrain = new QgsDemTerrainGenerator; | ||
demTerrain->setLayer( mLayerDtm ); | ||
map->setTerrainGenerator( demTerrain ); | ||
map->setTerrainVerticalScale( 3 ); | ||
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QgsOffscreen3DEngine engine; | ||
Qgs3DMapScene *scene = new Qgs3DMapScene( *map, &engine ); | ||
engine.setRootEntity( scene ); | ||
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scene->cameraController()->setLookingAtPoint( QgsVector3D( 0, 0, 0 ), 2000, 60, 0 ); | ||
QImage img3 = Qgs3DUtils::captureSceneImage( engine, scene ); | ||
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QVERIFY( renderCheck( "dem_terrain_1", img3, 40 ) ); | ||
} | ||
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void TestQgs3DRendering::testExtrudedPolygons() | ||
{ | ||
QgsRectangle fullExtent = mLayerDtm->extent(); | ||
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Qgs3DMapSettings *map = new Qgs3DMapSettings; | ||
map->setCrs( mProject->crs() ); | ||
map->setOrigin( QgsVector3D( fullExtent.center().x(), fullExtent.center().y(), 0 ) ); | ||
map->setLayers( QList<QgsMapLayer *>() << mLayerRgb << mLayerBuildings ); | ||
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QgsFlatTerrainGenerator *flatTerrain = new QgsFlatTerrainGenerator; | ||
flatTerrain->setCrs( map->crs() ); | ||
flatTerrain->setExtent( fullExtent ); | ||
map->setTerrainGenerator( flatTerrain ); | ||
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QgsOffscreen3DEngine engine; | ||
Qgs3DMapScene *scene = new Qgs3DMapScene( *map, &engine ); | ||
engine.setRootEntity( scene ); | ||
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scene->cameraController()->setLookingAtPoint( QgsVector3D( 0, 0, 250 ), 500, 45, 0 ); | ||
QImage img = Qgs3DUtils::captureSceneImage( engine, scene ); | ||
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QVERIFY( renderCheck( "polygon3d_extrusion", img, 40 ) ); | ||
} | ||
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bool TestQgs3DRendering::renderCheck( const QString &testName, QImage &image, int mismatchCount ) | ||
{ | ||
mReport += "<h2>" + testName + "</h2>\n"; | ||
QString myTmpDir = QDir::tempPath() + '/'; | ||
QString myFileName = myTmpDir + testName + ".png"; | ||
image.save( myFileName, "PNG" ); | ||
QgsRenderChecker myChecker; | ||
myChecker.setControlPathPrefix( QStringLiteral( "3d" ) ); | ||
myChecker.setControlName( "expected_" + testName ); | ||
myChecker.setRenderedImage( myFileName ); | ||
bool myResultFlag = myChecker.compareImages( testName, mismatchCount ); | ||
mReport += myChecker.report(); | ||
return myResultFlag; | ||
} | ||
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QGSTEST_MAIN( TestQgs3DRendering ) | ||
#include "testqgs3drendering.moc" |