mirror of https://github.com/vitalif/openscad
76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
#ifndef CGALUTILS_H_
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#define CGALUTILS_H_
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#include <cgal.h>
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#include "polyset.h"
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#include "CGAL_Nef_polyhedron.h"
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#include "enums.h"
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namespace CGALUtils {
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bool applyHull(const Geometry::ChildList &children, CGAL_Polyhedron &P);
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void applyBinaryOperator(CGAL_Nef_polyhedron &target, const CGAL_Nef_polyhedron &src, OpenSCADOperator op);
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CGAL_Nef_polyhedron project(const CGAL_Nef_polyhedron &N, bool cut);
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};
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CGAL_Nef_polyhedron *createNefPolyhedronFromGeometry(const class Geometry &geom);
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bool createPolySetFromPolyhedron(const CGAL_Polyhedron &p, PolySet &ps);
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bool createPolyhedronFromPolySet(const PolySet &ps, CGAL_Polyhedron &p);
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CGAL_Iso_cuboid_3 bounding_box( const CGAL_Nef_polyhedron3 &N );
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CGAL_Iso_rectangle_2e bounding_box( const CGAL_Nef_polyhedron2 &N );
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#include "svg.h"
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#include "printutils.h"
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/*
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ZRemover
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This class converts one or more Nef3 polyhedra into a Nef2 polyhedron by
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stripping off the 'z' coordinates from the vertices. The resulting Nef2
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poly is accumulated in the 'output_nefpoly2d' member variable.
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The 'z' coordinates will either be all 0s, for an xy-plane intersected Nef3,
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or, they will be a mixture of -eps and +eps, for a thin-box intersected Nef3.
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Notes on CGAL's Nef Polyhedron2:
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1. The 'mark' on a 2d Nef face is important when doing unions/intersections.
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If the 'mark' of a face is wrong the resulting nef2 poly will be unexpected.
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2. The 'mark' can be dependent on the points fed to the Nef2 constructor.
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This is why we iterate through the 3d faces using the halfedge cycle
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source()->target() instead of the ordinary source()->source(). The
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the latter can generate sequences of points that will fail the
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the CGAL::is_simple_2() test, resulting in improperly marked nef2 polys.
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3. 3d facets have 'two sides'. we throw out the 'down' side to prevent dups.
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The class uses the 'visitor' pattern from the CGAL manual. See also
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http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Nef_3/Chapter_main.html
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http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Nef_3_ref/Class_Nef_polyhedron3.html
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OGL_helper.h
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*/
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class ZRemover {
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public:
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logstream log;
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CGAL_Nef_polyhedron2::Boundary boundary;
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boost::shared_ptr<CGAL_Nef_polyhedron2> tmpnef2d;
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boost::shared_ptr<CGAL_Nef_polyhedron2> output_nefpoly2d;
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CGAL::Direction_3<CGAL_Kernel3> up;
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ZRemover()
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{
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output_nefpoly2d.reset( new CGAL_Nef_polyhedron2() );
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boundary = CGAL_Nef_polyhedron2::INCLUDED;
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up = CGAL::Direction_3<CGAL_Kernel3>(0,0,1);
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log = logstream(5);
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}
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void visit( CGAL_Nef_polyhedron3::Vertex_const_handle ) {}
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void visit( CGAL_Nef_polyhedron3::Halfedge_const_handle ) {}
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void visit( CGAL_Nef_polyhedron3::SHalfedge_const_handle ) {}
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void visit( CGAL_Nef_polyhedron3::SHalfloop_const_handle ) {}
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void visit( CGAL_Nef_polyhedron3::SFace_const_handle ) {}
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void visit( CGAL_Nef_polyhedron3::Halffacet_const_handle hfacet );
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};
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#endif
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