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Move private clase ZRemover to cc file

master
Marius Kintel 2015-03-02 14:46:45 -05:00
parent 70ae4acdd0
commit 4c6cc6aa78
2 changed files with 48 additions and 51 deletions
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48
src/cgalutils.cc
View File

@ -117,6 +117,54 @@ static CGAL_Nef_polyhedron *createNefPolyhedronFromPolygon2d(const Polygon2d &po
return createNefPolyhedronFromPolySet(*ps);
}
/*
ZRemover
This class converts one or more Nef3 polyhedra into a Nef2 polyhedron by
stripping off the 'z' coordinates from the vertices. The resulting Nef2
poly is accumulated in the 'output_nefpoly2d' member variable.
The 'z' coordinates will either be all 0s, for an xy-plane intersected Nef3,
or, they will be a mixture of -eps and +eps, for a thin-box intersected Nef3.
Notes on CGAL's Nef Polyhedron2:
1. The 'mark' on a 2d Nef face is important when doing unions/intersections.
If the 'mark' of a face is wrong the resulting nef2 poly will be unexpected.
2. The 'mark' can be dependent on the points fed to the Nef2 constructor.
This is why we iterate through the 3d faces using the halfedge cycle
source()->target() instead of the ordinary source()->source(). The
the latter can generate sequences of points that will fail the
the CGAL::is_simple_2() test, resulting in improperly marked nef2 polys.
3. 3d facets have 'two sides'. we throw out the 'down' side to prevent dups.
The class uses the 'visitor' pattern from the CGAL manual. See also
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Nef_3/Chapter_main.html
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Nef_3_ref/Class_Nef_polyhedron3.html
OGL_helper.h
*/
class ZRemover {
public:
CGAL_Nef_polyhedron2::Boundary boundary;
boost::shared_ptr<CGAL_Nef_polyhedron2> tmpnef2d;
boost::shared_ptr<CGAL_Nef_polyhedron2> output_nefpoly2d;
CGAL::Direction_3<CGAL_Kernel3> up;
ZRemover()
{
output_nefpoly2d.reset( new CGAL_Nef_polyhedron2() );
boundary = CGAL_Nef_polyhedron2::INCLUDED;
up = CGAL::Direction_3<CGAL_Kernel3>(0,0,1);
}
void visit( CGAL_Nef_polyhedron3::Vertex_const_handle ) {}
void visit( CGAL_Nef_polyhedron3::Halfedge_const_handle ) {}
void visit( CGAL_Nef_polyhedron3::SHalfedge_const_handle ) {}
void visit( CGAL_Nef_polyhedron3::SHalfloop_const_handle ) {}
void visit( CGAL_Nef_polyhedron3::SFace_const_handle ) {}
void visit( CGAL_Nef_polyhedron3::Halffacet_const_handle hfacet );
};
namespace CGALUtils {
bool applyHull(const Geometry::ChildList &children, PolySet &result)

51
src/cgalutils.h
View File

@ -40,54 +40,3 @@ namespace CGALUtils {
std::vector<CGAL_Polygon_3> &triangles,
CGAL::Plane_3<CGAL_Kernel3> &plane);
};
#include "svg.h"
#include "printutils.h"
/*
ZRemover
This class converts one or more Nef3 polyhedra into a Nef2 polyhedron by
stripping off the 'z' coordinates from the vertices. The resulting Nef2
poly is accumulated in the 'output_nefpoly2d' member variable.
The 'z' coordinates will either be all 0s, for an xy-plane intersected Nef3,
or, they will be a mixture of -eps and +eps, for a thin-box intersected Nef3.
Notes on CGAL's Nef Polyhedron2:
1. The 'mark' on a 2d Nef face is important when doing unions/intersections.
If the 'mark' of a face is wrong the resulting nef2 poly will be unexpected.
2. The 'mark' can be dependent on the points fed to the Nef2 constructor.
This is why we iterate through the 3d faces using the halfedge cycle
source()->target() instead of the ordinary source()->source(). The
the latter can generate sequences of points that will fail the
the CGAL::is_simple_2() test, resulting in improperly marked nef2 polys.
3. 3d facets have 'two sides'. we throw out the 'down' side to prevent dups.
The class uses the 'visitor' pattern from the CGAL manual. See also
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Nef_3/Chapter_main.html
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Nef_3_ref/Class_Nef_polyhedron3.html
OGL_helper.h
*/
class ZRemover {
public:
CGAL_Nef_polyhedron2::Boundary boundary;
boost::shared_ptr<CGAL_Nef_polyhedron2> tmpnef2d;
boost::shared_ptr<CGAL_Nef_polyhedron2> output_nefpoly2d;
CGAL::Direction_3<CGAL_Kernel3> up;
ZRemover()
{
output_nefpoly2d.reset( new CGAL_Nef_polyhedron2() );
boundary = CGAL_Nef_polyhedron2::INCLUDED;
up = CGAL::Direction_3<CGAL_Kernel3>(0,0,1);
}
void visit( CGAL_Nef_polyhedron3::Vertex_const_handle ) {}
void visit( CGAL_Nef_polyhedron3::Halfedge_const_handle ) {}
void visit( CGAL_Nef_polyhedron3::SHalfedge_const_handle ) {}
void visit( CGAL_Nef_polyhedron3::SHalfloop_const_handle ) {}
void visit( CGAL_Nef_polyhedron3::SFace_const_handle ) {}
void visit( CGAL_Nef_polyhedron3::Halffacet_const_handle hfacet );
};