Qt3DCore::QEntity *QgsDemTerrainTileLoader::createEntity( Qt3DCore::QEntity *parent )
{
QgsTerrainTileEntity *entity = new QgsTerrainTileEntity;
// create geometry renderer
Qt3DRender::QGeometryRenderer *mesh = new Qt3DRender::QGeometryRenderer;
mesh->setGeometry( new DemTerrainTileGeometry( mResolution, mHeightMap, mesh ) );
entity->addComponent( mesh ); // takes ownership if the component has no parent
// create material
createTextureComponent( entity );
// create transform
Qt3DCore::QTransform *transform;
transform = new Qt3DCore::QTransform();
entity->addComponent( transform );
float zMin, zMax;
_heightMapMinMax( mHeightMap, zMin, zMax );
const Qgs3DMapSettings &map = terrain()->map3D();
QgsRectangle extent = map.terrainGenerator()->tilingScheme().tileToExtent( mNode->tileX(), mNode->tileY(), mNode->tileZ() ); //node->extent;
double x0 = extent.xMinimum() - map.originX();
double y0 = extent.yMinimum() - map.originY();
double side = extent.width();
double half = side / 2;
transform->setScale3D( QVector3D( side, map.terrainVerticalScale(), side ) );
transform->setTranslation( QVector3D( x0 + half, 0, - ( y0 + half ) ) );
mNode->setExactBbox( QgsAABB( x0, zMin * map.terrainVerticalScale(), -y0, x0 + side, zMax * map.terrainVerticalScale(), -( y0 + side ) ) );
entity->setEnabled( false );
entity->setParent( parent );
return entity;
}
Qt3DCore::QEntity *FlatTerrainChunkLoader::createEntity( Qt3DCore::QEntity *parent )
{
QgsTerrainTileEntity *entity = new QgsTerrainTileEntity;
// make geometry renderer
// simple quad geometry shared by all tiles
// QPlaneGeometry by default is 1x1 with mesh resolution QSize(2,2), centered at 0
// TODO: the geometry could be shared inside Terrain instance (within terrain-generator specific data?)
mTileGeometry = new Qt3DExtras::QPlaneGeometry;
Qt3DRender::QGeometryRenderer *mesh = new Qt3DRender::QGeometryRenderer;
mesh->setGeometry( mTileGeometry ); // takes ownership if the component has no parent
entity->addComponent( mesh ); // takes ownership if the component has no parent
// create material
createTextureComponent( entity );
// create transform
Qt3DCore::QTransform *transform = nullptr;
transform = new Qt3DCore::QTransform();
entity->addComponent( transform );
// set up transform according to the extent covered by the quad geometry
QgsAABB bbox = mNode->bbox();
double side = bbox.xMax - bbox.xMin;
double half = side / 2;
transform->setScale( side );
transform->setTranslation( QVector3D( bbox.xMin + half, 0, bbox.zMin + half ) );
entity->setEnabled( false );
entity->setParent( parent );
return entity;
}
