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/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
#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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