void Qgs3DMapConfigWidget::apply()
{
QgsRasterLayer *demLayer = qobject_cast<QgsRasterLayer *>( cboTerrainLayer->currentLayer() );
bool needsUpdateOrigin = false;
if ( demLayer )
{
bool tGenNeedsUpdate = true;
if ( mMap->terrainGenerator()->type() == QgsTerrainGenerator::Dem )
{
// if we already have a DEM terrain generator, check whether there was actually any change
QgsDemTerrainGenerator *oldDemTerrainGen = static_cast<QgsDemTerrainGenerator *>( mMap->terrainGenerator() );
if ( oldDemTerrainGen->layer() == demLayer &&
oldDemTerrainGen->resolution() == spinTerrainResolution->value() &&
oldDemTerrainGen->skirtHeight() == spinTerrainSkirtHeight->value() )
tGenNeedsUpdate = false;
}
if ( tGenNeedsUpdate )
{
QgsDemTerrainGenerator *demTerrainGen = new QgsDemTerrainGenerator;
demTerrainGen->setCrs( mMap->crs(), QgsProject::instance()->transformContext() );
demTerrainGen->setLayer( demLayer );
demTerrainGen->setResolution( spinTerrainResolution->value() );
demTerrainGen->setSkirtHeight( spinTerrainSkirtHeight->value() );
mMap->setTerrainGenerator( demTerrainGen );
needsUpdateOrigin = true;
}
}
else if ( !demLayer && mMap->terrainGenerator()->type() != QgsTerrainGenerator::Flat )
{
QgsFlatTerrainGenerator *flatTerrainGen = new QgsFlatTerrainGenerator;
flatTerrainGen->setCrs( mMap->crs() );
flatTerrainGen->setExtent( mMainCanvas->fullExtent() );
mMap->setTerrainGenerator( flatTerrainGen );
needsUpdateOrigin = true;
}
if ( needsUpdateOrigin )
{
// reproject terrain's extent to map CRS
QgsRectangle te = mMap->terrainGenerator()->extent();
QgsCoordinateTransform terrainToMapTransform( mMap->terrainGenerator()->crs(), mMap->crs(), QgsProject::instance() );
te = terrainToMapTransform.transformBoundingBox( te );
QgsPointXY center = te.center();
mMap->setOrigin( QgsVector3D( center.x(), center.y(), 0 ) );
}
mMap->setTerrainVerticalScale( spinTerrainScale->value() );
mMap->setMapTileResolution( spinMapResolution->value() );
mMap->setMaxTerrainScreenError( spinScreenError->value() );
mMap->setMaxTerrainGroundError( spinGroundError->value() );
mMap->setShowLabels( chkShowLabels->isChecked() );
mMap->setShowTerrainTilesInfo( chkShowTileInfo->isChecked() );
mMap->setShowTerrainBoundingBoxes( chkShowBoundingBoxes->isChecked() );
mMap->setShowCameraViewCenter( chkShowCameraViewCenter->isChecked() );
}
float QgsTerrainGenerator::rootChunkError( const Qgs3DMapSettings &map ) const
{
QgsRectangle te = extent();
QgsCoordinateTransform terrainToMapTransform( crs(), map.crs() );
te = terrainToMapTransform.transformBoundingBox( te );
// use texel size as the error
return te.width() / map.mapTileResolution();
}
QgsAABB QgsTerrainGenerator::rootChunkBbox( const Qgs3DMapSettings &map ) const
{
QgsRectangle te = extent();
QgsCoordinateTransform terrainToMapTransform( crs(), map.crs() );
te = terrainToMapTransform.transformBoundingBox( te );
float hMin, hMax;
rootChunkHeightRange( hMin, hMax );
return QgsAABB( te.xMinimum() - map.originX(), hMin * map.terrainVerticalScale(), -te.yMaximum() + map.originY(),
te.xMaximum() - map.originX(), hMax * map.terrainVerticalScale(), -te.yMinimum() + map.originY() );
}
