From cf9f19818ca5886275019f8e93c7fb8ec0e4bde6 Mon Sep 17 00:00:00 2001
From: Don Bright <hugh.m.bright@gmail.com>
Date: Tue, 26 Nov 2013 20:04:57 -0600
Subject: prevent crash in CGAL nef3. fix #issue 410 . also deal w qmake bug re
 .h files


diff --git a/openscad.pro b/openscad.pro
index fd9f494..b38419e 100644
--- a/openscad.pro
+++ b/openscad.pro
@@ -39,6 +39,7 @@ debug: DEFINES += DEBUG
 TEMPLATE = app
 
 INCLUDEPATH += src
+DEPENDPATH += src
 
 # Handle custom library location.
 # Used when manually installing 3rd party libraries
@@ -368,6 +369,7 @@ HEADERS += src/cgal.h \
            src/PolySetCGALEvaluator.h \
            src/CGALRenderer.h \
            src/CGAL_Nef_polyhedron.h \
+           src/CGAL_Nef3_workaround.h \
            src/cgalworker.h
 
 SOURCES += src/cgalutils.cc \
diff --git a/src/CGALEvaluator.cc b/src/CGALEvaluator.cc
index ec01315..242fe0f 100644
--- a/src/CGALEvaluator.cc
+++ b/src/CGALEvaluator.cc
@@ -159,9 +159,19 @@ CGAL_Nef_polyhedron CGALEvaluator::applyHull(const CgaladvNode &node)
 				PRINT("Hull() currently requires a valid 2-manifold. Please modify your design. See http://en.wikibooks.org/wiki/OpenSCAD_User_Manual/STL_Import_and_Export");
 			}
 			else {
-				chN.p3->convert_to_Polyhedron(P);
-				std::transform(P.vertices_begin(), P.vertices_end(), std::back_inserter(points3d), 
-											 boost::bind(static_cast<const CGAL_Polyhedron::Vertex::Point_3&(CGAL_Polyhedron::Vertex::*)() const>(&CGAL_Polyhedron::Vertex::point), _1));
+				bool err = false;
+				try{
+					err = nefworkaround::convert_to_Polyhedron<CGAL_Kernel3>( *(chN.p3), P );
+					//chN.p3->convert_to_Polyhedron(P);
+				} catch (...) {
+					err = true;
+				}
+				if (err) {
+					PRINT("ERROR: CGAL NefPolyhedron->Polyhedron conversion failed");
+				} else {
+					std::transform(P.vertices_begin(), P.vertices_end(), std::back_inserter(points3d), 
+										 boost::bind(static_cast<const CGAL_Polyhedron::Vertex::Point_3&(CGAL_Polyhedron::Vertex::*)() const>(&CGAL_Polyhedron::Vertex::point), _1));
+				}
 			}
 		}
 		chnode->progress_report();
diff --git a/src/CGAL_Nef_polyhedron.cc b/src/CGAL_Nef_polyhedron.cc
index 440f4ed..4761d26 100644
--- a/src/CGAL_Nef_polyhedron.cc
+++ b/src/CGAL_Nef_polyhedron.cc
@@ -98,11 +98,22 @@ PolySet *CGAL_Nef_polyhedron::convertToPolyset()
 		CGAL::Failure_behaviour old_behaviour = CGAL::set_error_behaviour(CGAL::THROW_EXCEPTION);
 		try {
 			CGAL_Polyhedron P;
-			this->p3->convert_to_Polyhedron(P);
-			ps = createPolySetFromPolyhedron(P);
+			bool err = nefworkaround::convert_to_Polyhedron<CGAL_Kernel3>( *(this->p3), P );
+			//this->p3->convert_to_Polyhedron(P);
+			if (err) {
+				PRINT("ERROR: CGAL NefPolyhedron->Polyhedron conversion failed");
+			} else {
+				ps = createPolySetFromPolyhedron(P);
+			}
 		}
 		catch (const CGAL::Precondition_exception &e) {
-			PRINTB("CGAL error in CGAL_Nef_polyhedron::convertToPolyset(): %s", e.what());
+			PRINTB("CGAL Precondition error in CGAL_Nef_polyhedron::convertToPolyset(): %s", e.what());
+		}
+		catch (const CGAL::Assertion_exception &e) {
+			PRINTB("CGAL Assertion error in CGAL_Nef_polyhedron::convertToPolyset(): %s", e.what());
+		}
+		catch (...) {
+			PRINT("CGAL unknown error in CGAL_Nef_polyhedron::convertToPolyset()");
 		}
 		CGAL::set_error_behaviour(old_behaviour);
 	}
diff --git a/src/cgal.h b/src/cgal.h
index 45228be..69c8c27 100644
--- a/src/cgal.h
+++ b/src/cgal.h
@@ -27,6 +27,7 @@ using boost::uintmax_t;
 #include <CGAL/Cartesian.h>
 #include <CGAL/Polyhedron_3.h>
 #include <CGAL/Nef_polyhedron_3.h>
+#include <CGAL_Nef3_workaround.h>
 #include <CGAL/IO/Polyhedron_iostream.h>
 #include <CGAL/Exact_predicates_exact_constructions_kernel.h>
 #include <CGAL/Polygon_2.h>
@@ -48,9 +49,10 @@ typedef CGAL::Exact_predicates_exact_constructions_kernel CGAL_ExactKernel2;
 typedef CGAL::Polygon_2<CGAL_ExactKernel2> CGAL_Poly2;
 typedef CGAL::Polygon_with_holes_2<CGAL_ExactKernel2> CGAL_Poly2h;
 
- //typedef CGAL::Cartesian<NT> CGAL_Kernel3;
-typedef CGAL::Exact_predicates_exact_constructions_kernel CGAL_Kernel3;
-typedef CGAL::Exact_predicates_exact_constructions_kernel::FT NT3;
+typedef CGAL::Gmpq NT3;
+typedef CGAL::Cartesian<NT3> CGAL_Kernel3;
+//typedef CGAL::Exact_predicates_exact_constructions_kernel::FT NT3;
+//typedef CGAL::Exact_predicates_exact_constructions_kernel CGAL_Kernel3;
 typedef CGAL::Nef_polyhedron_3<CGAL_Kernel3> CGAL_Nef_polyhedron3;
 typedef CGAL_Nef_polyhedron3::Aff_transformation_3 CGAL_Aff_transformation;
 
diff --git a/src/export.cc b/src/export.cc
index ec6e576..cef323e 100644
--- a/src/export.cc
+++ b/src/export.cc
@@ -42,7 +42,12 @@ void export_stl(CGAL_Nef_polyhedron *root_N, std::ostream &output)
 	CGAL::Failure_behaviour old_behaviour = CGAL::set_error_behaviour(CGAL::THROW_EXCEPTION);
 	try {
 	CGAL_Polyhedron P;
-	root_N->p3->convert_to_Polyhedron(P);
+	//root_N->p3->convert_to_Polyhedron(P);
+	bool err = nefworkaround::convert_to_Polyhedron<CGAL_Kernel3>( *(root_N->p3), P );
+	if (err) {
+	        PRINT("ERROR: CGAL NefPolyhedron->Polyhedron conversion failed");
+		return;
+	}
 
 	typedef CGAL_Polyhedron::Vertex                                 Vertex;
 	typedef CGAL_Polyhedron::Vertex_const_iterator                  VCI;
@@ -114,6 +119,9 @@ void export_stl(CGAL_Nef_polyhedron *root_N, std::ostream &output)
 	catch (const CGAL::Assertion_exception &e) {
 		PRINTB("CGAL error in CGAL_Nef_polyhedron3::convert_to_Polyhedron(): %s", e.what());
 	}
+	catch (...) {
+		PRINT("CGAL unknown error in CGAL_Nef_polyhedron3::convert_to_Polyhedron()");
+	}
 	CGAL::set_error_behaviour(old_behaviour);
 }
 
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