Remove automatic validity check at end of render

In more complex cases, the final Nef_Polyhedron is_valid check() took up to 30 % of the total rendering time just to be able to say Valid: YES. In the case of cached geometry, the validity check was totally dominating the execution time when doing a render. This patch removes the automatic validity check, instead adding a menu command "Check Validity".

Conflicts:
	src/mainwin.cc

1 files changed, 1 insertions, 0 deletions

diff --git a/src/MainWindow.h b/src/MainWindow.h
index e16f5b4..f04a6f1 100644
--- a/src/MainWindow.h
+++ b/src/MainWindow.h
@@ -137,6 +137,7 @@ private slots:
 	void actionRenderCGALDone(class CGAL_Nef_polyhedron *);
 	void cgalRender();
 #endif
+	void actionCheckValidity();
 	void actionDisplayAST();
 	void actionDisplayCSGTree();
 	void actionDisplayCSGProducts();