QList<QVector3D> Qgs3DUtils::positions( const Qgs3DMapSettings &map, QgsVectorLayer *layer, const QgsFeatureRequest &request, Qgs3DTypes::AltitudeClamping altClamp )
{
QList<QVector3D> positions;
QgsFeature f;
QgsFeatureIterator fi = layer->getFeatures( request );
while ( fi.nextFeature( f ) )
{
if ( f.geometry().isNull() )
continue;
const QgsAbstractGeometry *g = f.geometry().constGet();
for ( auto it = g->vertices_begin(); it != g->vertices_end(); ++it )
{
QgsPoint pt = *it;
float geomZ = 0;
if ( pt.is3D() )
{
geomZ = pt.z();
}
float terrainZ = map.terrainGenerator()->heightAt( pt.x(), pt.y(), map ) * map.terrainVerticalScale();
float h;
switch ( altClamp )
{
case Qgs3DTypes::AltClampAbsolute:
default:
h = geomZ;
break;
case Qgs3DTypes::AltClampTerrain:
h = terrainZ;
break;
case Qgs3DTypes::AltClampRelative:
h = terrainZ + geomZ;
break;
}
positions.append( QVector3D( pt.x() - map.origin().x(), h, -( pt.y() - map.origin().y() ) ) );
//qDebug() << positions.last();
}
}
return positions;
}
