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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_SPLIT_H__
#define __SUBD_SPLIT_H__
/* DiagSplit: Parallel, Crack-free, Adaptive Tessellation for Micropolygon Rendering
* Splits up patches and determines edge tessellation factors for dicing. Patch
* evaluation at arbitrary points is required for this to work. See the paper
* for more details. */
#include "subd/subd_dice.h"
#include "util/util_types.h"
#include "util/util_vector.h"
CCL_NAMESPACE_BEGIN
class Mesh;
class Patch;
#define DSPLIT_NON_UNIFORM -1
class DiagSplit {
public:
vector<QuadDice::SubPatch> subpatches_quad;
vector<QuadDice::EdgeFactors> edgefactors_quad;
SubdParams params;
explicit DiagSplit(const SubdParams& params);
float3 to_world(Patch *patch, float2 uv);
int T(Patch *patch, float2 Pstart, float2 Pend);
void partition_edge(Patch *patch, float2 *P, int *t0, int *t1,
float2 Pstart, float2 Pend, int t);
void dispatch(QuadDice::SubPatch& sub, QuadDice::EdgeFactors& ef);
void split(QuadDice::SubPatch& sub, QuadDice::EdgeFactors& ef, int depth=0);
void split_quad(Patch *patch, QuadDice::SubPatch *subpatch=NULL);
};
CCL_NAMESPACE_END
#endif /* __SUBD_SPLIT_H__ */
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