de821416c7
* Share vertices between patches instead of using stitch map * Switch to OpenSubdiv compatible counter-clockwise indexing * Simplify patch edge reverse direction logic * Add more comments to splitting and dicing Pull Request: https://projects.blender.org/blender/blender/pulls/135681
67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
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*
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* SPDX-License-Identifier: Apache-2.0 */
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#pragma once
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/* DiagSplit: Parallel, Crack-free, Adaptive Tessellation for Micro-polygon 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 "scene/mesh.h"
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#include "subd/dice.h"
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#include "subd/subpatch.h"
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#include "util/set.h"
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#include "util/types.h"
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#include "util/vector.h"
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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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private:
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SubdParams params;
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vector<SubPatch> subpatches;
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unordered_set<SubEdge, SubEdge::Hash, SubEdge::Equal> edges;
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int num_verts = 0;
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int num_triangles = 0;
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/* Allocate vertices, edges and subpatches. */
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int alloc_verts(const int num);
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SubEdge *alloc_edge(const int v0, const int v1);
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void alloc_edge(SubPatch::Edge *sub_edge, const int v0, const int v1);
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void alloc_subpatch(SubPatch &&sub);
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/* Compute edge factors. */
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float3 to_world(const Patch *patch, const float2 uv);
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int T(const Patch *patch,
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const float2 Pstart,
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const float2 Pend,
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const int depth,
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const bool recursive_resolve = false);
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int limit_edge_factor(const Patch *patch, const float2 Pstart, const float2 Pend, const int T);
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void assign_edge_factor(SubEdge *edge, const int T);
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void resolve_edge_factors(const SubPatch &sub, const int depth);
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/* Split edge, subpatch, quad and n-gon. */
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float2 split_edge(
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const Patch *patch, SubPatch::Edge *edge, float2 Pstart, float2 Pend, const int depth);
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void split(SubPatch &&sub, const int depth = 0);
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void split_quad(const Mesh::SubdFace &face, const Patch *patch);
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void split_ngon(const Mesh::SubdFace &face,
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const Patch *patches,
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const size_t patches_byte_stride);
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public:
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explicit DiagSplit(const SubdParams ¶ms);
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void split_patches(const Patch *patches, const size_t patches_byte_stride);
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};
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CCL_NAMESPACE_END
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