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/**
* $Id$
* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*/
#ifndef BSP_CSGNCMeshSplitter_h
#define BSP_CSGNCMeshSplitter_h
class BSP_MeshFragment;
class MT_Plane3;
class BSP_CSGMesh;
#include "BSP_MeshPrimitives.h"
#include "../extern/CSG_BooleanOps.h"
#include "BSP_CSGISplitter.h"
/**
* This class contains splitting functions for a CSGMesh.
* The atomic operation of a bsp CSG algorithm is to split
* a mesh fragment (connected collection of polygons contained
* in a convex cell) by a plane. This class makes no attempt
* to maintain edge connectivity in the mesh. It just rips
* up the polygons. This is fine for tree building.
*/
class BSP_CSGNCMeshSplitter : public BSP_CSGISplitter
{
public :
/// construction
BSP_CSGNCMeshSplitter(
);
BSP_CSGNCMeshSplitter(
const BSP_CSGNCMeshSplitter & other
);
/**
* @section BSP specific mesh operations.
* Inherited from BSP_CSGISplitter
*/
/**
* Split a mesh fragment wrt plane. Generates 3 mesh fragments,
* in, out and on. Only splits polygons - not edges, does not maintain
* connectivity information. The contents of frag are consumed by this oepration.
*/
void
Split(
const MT_Plane3& plane,
BSP_MeshFragment *frag,
BSP_MeshFragment *in_frag,
BSP_MeshFragment *out_frag,
BSP_MeshFragment *on_frag,
BSP_MeshFragment *spanning_frag
);
/// Split the entire mesh with respect to the plane.
void
Split(
BSP_CSGMesh & mesh,
const MT_Plane3& plane,
BSP_MeshFragment *in_frag,
BSP_MeshFragment *out_frag,
BSP_MeshFragment *on_frag,
BSP_MeshFragment *spanning_frag
);
~BSP_CSGNCMeshSplitter(
);
private :
void
SplitImp(
BSP_CSGMesh & mesh,
const MT_Plane3& plane,
const std::vector<BSP_FaceInd> & spanning_faces,
BSP_MeshFragment *in_frag,
BSP_MeshFragment *out_frag,
BSP_MeshFragment *on_frag,
std::vector<BSP_VertexInd> & classified_verts
);
void
SplitPolygon(
const MT_Plane3 &plane,
BSP_CSGMesh & mesh,
BSP_FaceInd fi,
BSP_FaceInd &fin,
BSP_FaceInd &fout
);
/// Cached helpers
/// Split function responsibe for:
std::vector<BSP_FaceInd> m_spanning_faces;
std::vector<BSP_VertexInd> m_tagged_verts;
/// SplitPolygon responsible for:
std::vector<BSP_FaceInd> m_in_loop,m_out_loop,m_on_loop;
};
#endif
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