From e320641d0fddaa69fa1493fa99e447999bff78e9 Mon Sep 17 00:00:00 2001
From: clifford <clifford@b57f626f-c46c-0410-a088-ec61d464b74c>
Date: Sun, 21 Jun 2009 16:41:38 +0000
Subject: Clifford Wolf: 	Improved cube generation 	Added simple
 off viewer

git-svn-id: http://svn.clifford.at/openscad/trunk@8 b57f626f-c46c-0410-a088-ec61d464b74c

diff --git a/cube.cc b/cube.cc
index 7840c63..c692a0d 100644
--- a/cube.cc
+++ b/cube.cc
@@ -58,16 +58,69 @@ void register_builtin_cube()
 	builtin_modules["cube"] = new CubeModule();
 }
 
+class CGAL_Build_cube : public CGAL::Modifier_base<CGAL_HDS>
+{
+public:
+	const CubeNode *n;
+	CGAL_Build_cube(const CubeNode *n) : n(n) { }
+	void operator()(CGAL_HDS& hds) {
+		CGAL_Polybuilder B(hds, true);
+		B.begin_surface(8, 6, 24);
+		typedef CGAL_HDS::Vertex::Point Point;
+		B.add_vertex(Point(-n->x/2, -n->y/2, +n->z/2)); // 0
+		B.add_vertex(Point(+n->x/2, -n->y/2, +n->z/2)); // 1
+		B.add_vertex(Point(+n->x/2, +n->y/2, +n->z/2)); // 2
+		B.add_vertex(Point(-n->x/2, +n->y/2, +n->z/2)); // 3
+		B.add_vertex(Point(-n->x/2, -n->y/2, -n->z/2)); // 4
+		B.add_vertex(Point(+n->x/2, -n->y/2, -n->z/2)); // 5
+		B.add_vertex(Point(+n->x/2, +n->y/2, -n->z/2)); // 6
+		B.add_vertex(Point(-n->x/2, +n->y/2, -n->z/2)); // 7
+		B.begin_facet();
+		B.add_vertex_to_facet(0);
+		B.add_vertex_to_facet(1);
+		B.add_vertex_to_facet(2);
+		B.add_vertex_to_facet(3);
+		B.end_facet();
+		B.begin_facet();
+		B.add_vertex_to_facet(7);
+		B.add_vertex_to_facet(6);
+		B.add_vertex_to_facet(5);
+		B.add_vertex_to_facet(4);
+		B.end_facet();
+		B.begin_facet();
+		B.add_vertex_to_facet(4);
+		B.add_vertex_to_facet(5);
+		B.add_vertex_to_facet(1);
+		B.add_vertex_to_facet(0);
+		B.end_facet();
+		B.begin_facet();
+		B.add_vertex_to_facet(5);
+		B.add_vertex_to_facet(6);
+		B.add_vertex_to_facet(2);
+		B.add_vertex_to_facet(1);
+		B.end_facet();
+		B.begin_facet();
+		B.add_vertex_to_facet(6);
+		B.add_vertex_to_facet(7);
+		B.add_vertex_to_facet(3);
+		B.add_vertex_to_facet(2);
+		B.end_facet();
+		B.begin_facet();
+		B.add_vertex_to_facet(7);
+		B.add_vertex_to_facet(4);
+		B.add_vertex_to_facet(0);
+		B.add_vertex_to_facet(3);
+		B.end_facet();
+		B.end_surface();
+	}
+};
+
 CGAL_Nef_polyhedron CubeNode::render_cgal_nef_polyhedron() const
 {
-	CGAL_Plane P1 = CGAL_Plane(+1,  0,  0, -x/2);
-	CGAL_Nef_polyhedron N1(P1);
-	CGAL_Nef_polyhedron N2(CGAL_Plane(-1,  0,  0, -x/2));
-	CGAL_Nef_polyhedron N3(CGAL_Plane( 0, +1,  0, -y/2));
-	CGAL_Nef_polyhedron N4(CGAL_Plane( 0, -1,  0, -y/2));
-	CGAL_Nef_polyhedron N5(CGAL_Plane( 0,  0, +1, -z/2));
-	CGAL_Nef_polyhedron N6(CGAL_Plane( 0,  0, -1, -z/2));
-	CGAL_Nef_polyhedron N = N1 * N2 * N3 * N4 * N5 * N6;
+	CGAL_Polyhedron P;
+	CGAL_Build_cube builder(this);
+	P.delegate(builder);
+	CGAL_Nef_polyhedron N(P);
 	progress_report();
 	return N;
 }
diff --git a/openscad.cc b/openscad.cc
index 99d9056..988b4c2 100644
--- a/openscad.cc
+++ b/openscad.cc
@@ -22,11 +22,6 @@
 
 #include "openscad.h"
 
-#include <CGAL/IO/Polyhedron_iostream.h>
-
-#include <fstream>
-#include <iostream>
-
 void report_func(const class AbstractNode*, void*, int mark)
 {
 	printf("CSG rendering progress: %.2f%%\n", (mark*100.0) / progress_report_count);
diff --git a/openscad.h b/openscad.h
index e48ae73..4b9abca 100644
--- a/openscad.h
+++ b/openscad.h
@@ -27,6 +27,9 @@
 #include <stdlib.h>
 #include <math.h>
 
+#include <fstream>
+#include <iostream>
+
 class Value;
 class Expression;
 
@@ -217,9 +220,13 @@ public:
 #include <CGAL/Cartesian.h>
 #include <CGAL/Polyhedron_3.h>
 #include <CGAL/Nef_polyhedron_3.h>
+#include <CGAL/IO/Polyhedron_iostream.h>
 
-typedef CGAL::Extended_cartesian<CGAL::Gmpq> CGAL_Kernel;
+typedef CGAL::Cartesian<CGAL::Gmpq> CGAL_Kernel;
+// typedef CGAL::Extended_cartesian<CGAL::Gmpq> CGAL_Kernel;
 typedef CGAL::Polyhedron_3<CGAL_Kernel> CGAL_Polyhedron;
+typedef CGAL_Polyhedron::HalfedgeDS CGAL_HDS;
+typedef CGAL::Polyhedron_incremental_builder_3<CGAL_HDS> CGAL_Polybuilder;
 typedef CGAL::Nef_polyhedron_3<CGAL_Kernel> CGAL_Nef_polyhedron;
 typedef CGAL_Nef_polyhedron::Aff_transformation_3  CGAL_Aff_transformation;
 typedef CGAL_Nef_polyhedron::Vector_3 CGAL_Vector;
diff --git a/viewoff.cc b/viewoff.cc
new file mode 100644
index 0000000..bfc0b78
--- /dev/null
+++ b/viewoff.cc
@@ -0,0 +1,66 @@
+
+// g++ -o viewoff -lCGAL -lCGAL_Qt3 -I/opt/qt3/include/ -L/opt/qt3/lib/ -lqt viewoff.cc
+
+#include <CGAL/Cartesian.h>
+#include <CGAL/IO/Nef_polyhedron_iostream_3.h>
+#include <CGAL/IO/Polyhedron_VRML_1_ostream.h> 
+#include <CGAL/IO/Polyhedron_iostream.h>
+#include <CGAL/Nef_polyhedron_3.h>
+#include <CGAL/Polyhedron_3.h>
+#include <CGAL/Simple_cartesian.h>
+#include <fstream>
+#include <iostream>
+#include <CGAL/IO/Qt_widget_Nef_3.h>
+#include <qapplication.h>
+
+#define VERBOSE 0
+
+typedef CGAL::Cartesian<CGAL::Gmpq> Kernel;
+typedef CGAL::Polyhedron_3<Kernel> Polyhedron;
+typedef CGAL::Nef_polyhedron_3<Kernel> Nef_polyhedron;
+
+int main(int argc, char **argv)
+{
+	QApplication a(argc, argv);
+
+	for (int i=1; i<argc; i++) {
+		std::ifstream inFile(argv[i]);
+		if (inFile.fail()) {
+			std::cerr << "unable to open file " << argv[i] << " for reading!" << std::endl;
+			exit(1);
+		}
+#if VERBOSE
+		printf("--- %s ---\n", argv[i]);
+#endif
+		Polyhedron P;
+		CGAL::scan_OFF(inFile, P, true);
+		if (inFile.bad()) {
+			std::cerr << "failed reading OFF file " << argv[i] << "!" << std::endl;
+			exit(1);
+		}
+#if VERBOSE
+		printf("P: Closed:      %6s\n", P.is_closed() ? "yes" : "no");
+		printf("P: Vertices:    %6d\n", (int)P.size_of_vertices());
+		printf("P: Halfedges:   %6d\n", (int)P.size_of_halfedges());
+		printf("P: Facets:      %6d\n", (int)P.size_of_facets());
+#endif
+		Nef_polyhedron NP(P);
+#if VERBOSE
+		printf("NP: Simple:     %6s\n", NP.is_simple() ? "yes" : "no");
+		printf("NP: Valid:      %6s\n", NP.is_valid() ? "yes" : "no");
+		printf("NP: Vertices:   %6d\n", (int)NP.number_of_vertices());
+		printf("NP: Halfedges:  %6d\n", (int)NP.number_of_halfedges());
+		printf("NP: Edges:      %6d\n", (int)NP.number_of_edges());
+		printf("NP: Halffacets: %6d\n", (int)NP.number_of_halffacets());
+		printf("NP: Facets:     %6d\n", (int)NP.number_of_facets());
+		printf("NP: Volumes:    %6d\n", (int)NP.number_of_volumes());
+#endif
+		CGAL::Qt_widget_Nef_3<Nef_polyhedron>* w = new CGAL::Qt_widget_Nef_3<Nef_polyhedron>(NP);
+		if (i == 1)
+			a.setMainWidget(w);
+		w->show();
+	}
+
+	return a.exec();
+}
+
-- 
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