Don't generate triangulation files by default in TIN algorithm

Author: nyalldawson

python/plugins/processing/algs/qgis/TinInterpolation.py

@@ -134,10 +134,12 @@ def initAlgorithm(self, config=None):
         self.addParameter(QgsProcessingParameterRasterDestination(self.OUTPUT,
                                                                   self.tr('Interpolated')))
 
-        self.addParameter(QgsProcessingParameterFileDestination(self.TRIANGULATION_FILE,
-                                                                self.tr('Triangulation'),
-                                                                self.tr('SHP files (*.shp)'),
-                                                                optional=True))
+        triangulation_file_param = QgsProcessingParameterFileDestination(self.TRIANGULATION_FILE,
+                                                                         self.tr('Triangulation'),
+                                                                         self.tr('SHP files (*.shp)'),
+                                                                         optional=True)
+        triangulation_file_param.setCreateByDefault(False)
+        self.addParameter(triangulation_file_param)
 
     def name(self):
         return 'tininterpolation'

src/analysis/interpolation/MathUtils.cc

@@ -29,7 +29,6 @@ bool MathUtils::calcBarycentricCoordinates( double x, double y, QgsPoint *p1, Qg
     double area = triArea( p1, p2, p3 );
     if ( area == 0 )//p1, p2, p3 are in a line
     {
-      QgsDebugMsg( "warning, triangle area should not be 0" );
       return false;
     }
     double area1 = triArea( &p, p2, p3 );