Fix numerical problems in circular string rendering

mhugent · mhugent · commit 81dc11a924ef · 2015-10-15T09:15:28.000+02:00
diff --git a/src/core/geometry/qgsgeometryutils.cpp b/src/core/geometry/qgsgeometryutils.cpp
@@ -285,7 +285,7 @@ void QgsGeometryUtils::circleCenterRadius( const QgsPointV2& pt1, const QgsPoint
   det = ( pt1.x() - pt2.x() ) * ( pt2.y() - pt3.y() ) - ( pt2.x() - pt3.x() ) * ( pt1.y() - pt2.y() );
 
   /* Check colinearity */
-  if ( qgsDoubleNear( fabs( det ), 0.0 ) )
+  if ( qgsDoubleNear( fabs( det ), 0.0, 0.00000000001 ) )
   {
     radius = -1.0;
     return;

Original file line number	Diff line number	Diff line change
`@@ -285,7 +285,7 @@ void QgsGeometryUtils::circleCenterRadius( const QgsPointV2& pt1, const QgsPoint`
`285`	`285`	`det = ( pt1.x() - pt2.x() ) * ( pt2.y() - pt3.y() ) - ( pt2.x() - pt3.x() ) * ( pt1.y() - pt2.y() );`
`286`	`286`
`287`	`287`	`/* Check colinearity */`
`288`		`- if ( qgsDoubleNear( fabs( det ), 0.0 ) )`
	`288`	`+ if ( qgsDoubleNear( fabs( det ), 0.0, 0.00000000001 ) )`
`289`	`289`	`{`
`290`	`290`	`radius = -1.0;`
`291`	`291`	`return;`