int QgsInterpolator::cacheBaseData()
{
if ( mLayerData.size() < 1 )
{
return 0;
}
//reserve initial memory for 100000 vertices
mCachedBaseData.clear();
mCachedBaseData.reserve( 100000 );
QList<LayerData>::iterator v_it = mLayerData.begin();
for ( ; v_it != mLayerData.end(); ++v_it )
{
if ( v_it->vectorLayer == 0 )
{
continue;
}
QgsVectorDataProvider* provider = v_it->vectorLayer->dataProvider();
if ( !provider )
{
return 2;
}
QgsAttributeList attList;
if ( !v_it->zCoordInterpolation )
{
attList.push_back( v_it->interpolationAttribute );
}
provider->select( attList );
QgsFeature theFeature;
double attributeValue = 0.0;
bool attributeConversionOk = false;
while ( provider->nextFeature( theFeature ) )
{
if ( !v_it->zCoordInterpolation )
{
QgsAttributeMap attMap = theFeature.attributeMap();
QgsAttributeMap::const_iterator att_it = attMap.find( v_it->interpolationAttribute );
if ( att_it == attMap.end() ) //attribute not found, something must be wrong (e.g. NULL value)
{
continue;
}
attributeValue = att_it.value().toDouble( &attributeConversionOk );
if ( !attributeConversionOk || qIsNaN( attributeValue ) ) //don't consider vertices with attributes like 'nan' for the interpolation
{
continue;
}
}
if ( addVerticesToCache( theFeature.geometry(), v_it->zCoordInterpolation, attributeValue ) != 0 )
{
return 3;
}
}
}
return 0;
}
int QgsInterpolator::cacheBaseData()
{
if ( mLayerData.size() < 1 )
{
return 0;
}
//reserve initial memory for 100000 vertices
mCachedBaseData.clear();
mCachedBaseData.reserve( 100000 );
Q_FOREACH ( const LayerData& layer, mLayerData )
{
if ( !layer.vectorLayer )
{
continue;
}
QgsVectorLayer* vlayer = layer.vectorLayer;
if ( !vlayer )
{
return 2;
}
QgsAttributeList attList;
if ( !layer.zCoordInterpolation )
{
attList.push_back( layer.interpolationAttribute );
}
double attributeValue = 0.0;
bool attributeConversionOk = false;
QgsFeatureIterator fit = vlayer->getFeatures( QgsFeatureRequest().setSubsetOfAttributes( attList ) );
QgsFeature theFeature;
while ( fit.nextFeature( theFeature ) )
{
if ( !layer.zCoordInterpolation )
{
QVariant attributeVariant = theFeature.attribute( layer.interpolationAttribute );
if ( !attributeVariant.isValid() ) //attribute not found, something must be wrong (e.g. NULL value)
{
continue;
}
attributeValue = attributeVariant.toDouble( &attributeConversionOk );
if ( !attributeConversionOk || qIsNaN( attributeValue ) ) //don't consider vertices with attributes like 'nan' for the interpolation
{
continue;
}
}
if ( addVerticesToCache( theFeature.geometry(), layer.zCoordInterpolation, attributeValue ) != 0 )
{
return 3;
}
}
}
return 0;
}
