From e814d997e5dca0e231b2d46861556831071277b5 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Thu, 21 Aug 2014 13:26:35 +0200
Subject: [PATCH] + fix trim mesh with plane

---
 src/Mod/Mesh/Gui/Command.cpp | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/src/Mod/Mesh/Gui/Command.cpp b/src/Mod/Mesh/Gui/Command.cpp
index 76d5e204e9..5a89a9abee 100644
--- a/src/Mod/Mesh/Gui/Command.cpp
+++ b/src/Mod/Mesh/Gui/Command.cpp
@@ -947,18 +947,12 @@ void CmdMeshTrimByPlane::activated(int iMsg)
     Base::Placement plm = static_cast<App::GeoFeature*>(plane.front())->Placement.getValue();
     Base::Vector3d normal(0,0,1);
     plm.getRotation().multVec(normal, normal);
-    Base::Vector3d view;
-    if (normal == Base::Vector3d(0,0,1)) {
-        view.Set(0,1,0);
-    }
-    else {
-        Base::Vector3d dir(0,0,1);
-        view = normal % dir;
-    }
+    Base::Vector3d up(-1,0,0);
+    plm.getRotation().multVec(up, up);
+    Base::Vector3d view(0,1,0);
+    plm.getRotation().multVec(view, view);
 
     Base::Vector3d base = plm.getPosition();
-    Base::Vector3d up = normal % view;
-
     Base::Rotation rot(Base::Vector3d(0,0,1), view);
     Base::Matrix4D mat;
     rot.getValue(mat);