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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_CSGISplitter_h
#define BSP_CSGISplitter_h
class BSP_MeshFragment;
class BSP_CSGMesh;
class MT_Plane3;
/**
* This class defines a mesh splitter interface.
* It embodies the action of splitting a mesh by a plane.
* Depending on the context of the operation subclasses
* may wish to define different implementations. For example
* with building a BSP tree from a mesh, the mesh does not
* need to be kept consistent, it doesn't matter if the edges
* are maintained etc. However when pushing polygons through
* a BSP tree (say for CSG operations)it is important to
* try and maintain mesh connectivity and thus a different
* splitter implementation may be needed.
*
* This is an abstract interface class.
*/
class BSP_CSGISplitter
{
public:
/**
* Split the incoming mesh fragment (frag)
* by the plane, put the output into (in,out and on)
* Subclasses should clear the contents of the
* in_coming fragment.
*/
virtual
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
)= 0;
/**
* Split the entire mesh with respect to the plane.
* and place ouput into (in,out and on).
* Subclasses should clear the contents of the
* in_coming fragment.
*/
virtual
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
)=0;
virtual
~BSP_CSGISplitter(
){
};
protected :
BSP_CSGISplitter(
) {
//nothing to do
}
BSP_CSGISplitter(
const BSP_CSGISplitter &
) {
//nothing to do
}
};
#endif
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