Fix for the issue #673 : creation of sketch on -X direction-plane

diff --git a/src/SketchPlugin/SketchPlugin_Sketch.cpp b/src/SketchPlugin/SketchPlugin_Sketch.cpp
index f7d09acbba8c470885577364080549c77b94cb5d..1b97f5634a0bd4a3c1db14989ac38030bc4f80cb 100644 (file)
--- a/src/SketchPlugin/SketchPlugin_Sketch.cpp
+++ b/src/SketchPlugin/SketchPlugin_Sketch.cpp
@@ -228,8 +228,8 @@ void SketchPlugin_Sketch::attributeChanged(const std::string& theID) {
         aCoords = aCoords->multiplied(-aD * aCoords->distance(aZero));
         std::shared_ptr<GeomAPI_Pnt> anOrigPnt(new GeomAPI_Pnt(aCoords));
         // X axis is preferable to be dirX on the sketch
-        static const double tol = 1.e-7;
-        bool isX = fabs(anA - 1.0) < tol && fabs(aB) < tol && fabs(aC) < tol;
+        static const double tol = 0.1; // here can not be very small value to avoid very close to X normal axis (issue 595)
+        bool isX = fabs(anA) - 1.0 < tol && fabs(aB) < tol && fabs(aC) < tol;
         std::shared_ptr<GeomAPI_Dir> aTempDir(
           isX ? new GeomAPI_Dir(0, 1, 0) : new GeomAPI_Dir(1, 0, 0));
         std::shared_ptr<GeomAPI_Dir> aYDir(new GeomAPI_Dir(aNormDir->cross(aTempDir)));