From f16d3a65a1176475f0c71676d6bf0640fabe45c6 Mon Sep 17 00:00:00 2001
From: don bright <hugh.m.bright@gmail.com>
Date: Sun, 19 Aug 2012 16:43:04 -0500
Subject: print only a single warning about intersecting vertices at dxf
 tessellation , instead of spamming it over and over. also mention that it
 might be due to intersecting lines, not just duplicate vertices (duplicate
 vertices being perhaps generated by cgal's tessellator when it deals with
 intersecting lines)


diff --git a/src/dxftess-cgal.cc b/src/dxftess-cgal.cc
index 9cd3bfd..506b34a 100644
--- a/src/dxftess-cgal.cc
+++ b/src/dxftess-cgal.cc
@@ -109,6 +109,7 @@ void dxf_tesselate(PolySet *ps, DxfData &dxf, double rot, bool up, bool /* do_tr
 	Grid2d<point_info_t> point_info(GRID_FINE);
 	boost::unordered_map<edge_t,int> edge_to_triangle;
 	boost::unordered_map<edge_t,int> edge_to_path;
+	int duplicate_vertices = 0;
 
 	CGAL::Failure_behaviour old_behaviour = CGAL::set_error_behaviour(CGAL::THROW_EXCEPTION);
 	try {
@@ -131,7 +132,7 @@ void dxf_tesselate(PolySet *ps, DxfData &dxf, double rot, bool up, bool /* do_tr
 				// ..maybe it would be better to assert here. But this would
 				// break compatibility with the glu tesselator that handled such
 				// cases just fine.
-				PRINT( "WARNING: Duplicate vertex found during Tessellation. Render may be incorrect." );
+				duplicate_vertices++;
 				continue;
 			}
 
@@ -165,6 +166,9 @@ void dxf_tesselate(PolySet *ps, DxfData &dxf, double rot, bool up, bool /* do_tr
 		}
 	}
 
+	if ( duplicate_vertices > 0 )
+		PRINTB( "WARNING: duplicate vertices and/or intersecting lines found during DXF Tessellation. Render may be incorrect.", duplicate_vertices );
+
 	}
 	catch (CGAL::Assertion_exception e) {
 		PRINTB("CGAL error in dxf_tesselate(): %s", e.what());
-- 
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