76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __SUBD_SPLIT_H__
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#define __SUBD_SPLIT_H__
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/* DiagSplit: Parallel, Crack-free, Adaptive Tessellation for Micropolygon Rendering
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* Splits up patches and determines edge tessellation factors for dicing. Patch
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* evaluation at arbitrary points is required for this to work. See the paper
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* for more details. */
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#include "subd/subd_dice.h"
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#include "subd/subd_subpatch.h"
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#include "util/util_deque.h"
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#include "util/util_types.h"
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#include "util/util_vector.h"
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#include <deque>
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CCL_NAMESPACE_BEGIN
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class Mesh;
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class Patch;
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class DiagSplit {
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SubdParams params;
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vector<Subpatch> subpatches;
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/* deque is used so that element pointers remain vaild when size is changed. */
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deque<Edge> edges;
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float3 to_world(Patch *patch, float2 uv);
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int T(Patch *patch, float2 Pstart, float2 Pend, bool recursive_resolve = false);
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void limit_edge_factor(int &T, Patch *patch, float2 Pstart, float2 Pend);
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void resolve_edge_factors(Subpatch &sub);
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void partition_edge(
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Patch *patch, float2 *P, int *t0, int *t1, float2 Pstart, float2 Pend, int t);
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void split(Subpatch &sub, int depth = 0);
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int num_alloced_verts = 0;
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int alloc_verts(int n); /* Returns start index of new verts. */
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public:
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Edge *alloc_edge();
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explicit DiagSplit(const SubdParams ¶ms);
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void split_patches(Patch *patches, size_t patches_byte_stride);
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void split_quad(const Mesh::SubdFace &face, Patch *patch);
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void split_ngon(const Mesh::SubdFace &face, Patch *patches, size_t patches_byte_stride);
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void post_split();
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};
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CCL_NAMESPACE_END
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#endif /* __SUBD_SPLIT_H__ */
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