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/*
* Copyright 2011, Blender Foundation.
*
* 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.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __SUBD_BUILD_H__
#define __SUBD_BUILD_H__
CCL_NAMESPACE_BEGIN
class SubdFace;
class SubdFaceRing;
class SubdVert;
class GregoryAccStencil;
class Patch;
class StencilMask;
/* Builder */
class SubdBuilder
{
public:
virtual ~SubdBuilder() {};
virtual Patch *run(SubdFace *face) = 0;
static SubdBuilder *create(bool linear);
};
/* Approximate Catmull Clark using Loop's approximation */
class SubdAccBuilder : public SubdBuilder
{
public:
SubdAccBuilder();
~SubdAccBuilder();
Patch *run(SubdFace *face);
protected:
/* Gregory Patch */
void computeCornerStencil(SubdFaceRing *ring, GregoryAccStencil *stencil);
void computeEdgeStencil(SubdFaceRing *ring, GregoryAccStencil *stencil);
void computeInteriorStencil(SubdFaceRing *ring, GregoryAccStencil *stencil);
void computeBoundaryTangentStencils(SubdFaceRing *ring,
SubdVert *vert,
StencilMask & r0, StencilMask & r1);
};
/* Linear Subdivision */
class SubdLinearBuilder : public SubdBuilder
{
public:
SubdLinearBuilder();
~SubdLinearBuilder();
Patch *run(SubdFace *face);
};
CCL_NAMESPACE_END
#endif /* __SUBD_BUILD_H__ */
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