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[processing] evaluate dynamic parameters before processing feature

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This commit is contained in:
Alexander Bruy 2018-03-02 08:30:50 +02:00
parent 5daa8fdb67
commit 669beac824
1 changed files with 9 additions and 1 deletions
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10
src/analysis/processing/qgsalgorithmmultiringbuffer.cpp
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@ -106,12 +106,20 @@ QgsFeatureList QgsMultiRingBufferAlgorithm::processFeature( const QgsFeature &fe
double currentDistance = 0;
QgsGeometry outputGeometry, previousGeometry;
int rings = mRingsNumber;
if ( mDynamicRingsNumber )
rings = mRingsNumberProperty.valueAsInt( context.expressionContext(), rings );
double distance = mDistance;
if ( mDynamicDistance )
distance = mDistanceProperty.valueAsDouble( context.expressionContext(), distance );
QgsFeatureList outputs;
for ( int i = 1; i <= mRingsNumber; ++i )
{
QgsFeature out;
currentDistance = i * mDistance;
currentDistance = i * distance;
outputGeometry = feature.geometry().buffer( currentDistance, 40 );
if ( !outputGeometry )
{