372 lines
15 KiB
C++
372 lines
15 KiB
C++
// Copyright 2009-2020 Intel Corporation
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include "catmullclark_patch.h"
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#include "bilinear_patch.h"
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#include "bspline_patch.h"
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#include "bezier_patch.h"
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#include "gregory_patch.h"
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#include "tessellation_cache.h"
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#if 1
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#define PATCH_DEBUG_SUBDIVISION(ptr,x,y,z)
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#else
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#define PATCH_DEBUG_SUBDIVISION(ptr,x,y,z) \
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{ \
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size_t hex = (size_t)ptr; \
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for (size_t i=0; i<4; i++) hex = hex ^ (hex >> 8); \
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const float c = (float)(((hex >> 0) ^ (hex >> 4) ^ (hex >> 8) ^ (hex >> 12) ^ (hex >> 16))&0xf)/15.0f; \
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if (P) *P = Vertex(0.5f+0.5f*x,0.5f+0.5f*y,0.5f+0.5f*z,0.0f); \
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}
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#endif
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#define PATCH_MAX_CACHE_DEPTH 2
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//#define PATCH_MIN_RESOLUTION 1 // FIXME: not yet completely implemented
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#define PATCH_MAX_EVAL_DEPTH_IRREGULAR 10 // maximum evaluation depth at irregular vertices (has to be larger or equal than PATCH_MAX_CACHE_DEPTH)
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#define PATCH_MAX_EVAL_DEPTH_CREASE 10 // maximum evaluation depth at crease features (has to be larger or equal than PATCH_MAX_CACHE_DEPTH)
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#define PATCH_USE_GREGORY 1 // 0 = no gregory, 1 = fill, 2 = as early as possible
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#if PATCH_USE_GREGORY==2
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#define PATCH_USE_BEZIER_PATCH 1 // enable use of bezier instead of b-spline patches
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#else
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#define PATCH_USE_BEZIER_PATCH 0 // enable use of bezier instead of b-spline patches
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#endif
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#if PATCH_USE_BEZIER_PATCH
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# define RegularPatch BezierPatch
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# define RegularPatchT BezierPatchT<Vertex,Vertex_t>
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#else
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# define RegularPatch BSplinePatch
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# define RegularPatchT BSplinePatchT<Vertex,Vertex_t>
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#endif
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#if PATCH_USE_GREGORY
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#define IrregularFillPatch GregoryPatch
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#define IrregularFillPatchT GregoryPatchT<Vertex,Vertex_t>
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#else
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#define IrregularFillPatch BilinearPatch
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#define IrregularFillPatchT BilinearPatchT<Vertex,Vertex_t>
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#endif
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namespace embree
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{
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template<typename Vertex, typename Vertex_t = Vertex>
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struct __aligned(64) PatchT
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{
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public:
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typedef GeneralCatmullClarkPatchT<Vertex,Vertex_t> GeneralCatmullClarkPatch;
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typedef CatmullClarkPatchT<Vertex,Vertex_t> CatmullClarkPatch;
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typedef CatmullClark1RingT<Vertex,Vertex_t> CatmullClarkRing;
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typedef BezierCurveT<Vertex> BezierCurve;
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enum Type {
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INVALID_PATCH = 0,
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BILINEAR_PATCH = 1,
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BSPLINE_PATCH = 2,
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BEZIER_PATCH = 3,
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GREGORY_PATCH = 4,
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SUBDIVIDED_GENERAL_PATCH = 7,
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SUBDIVIDED_QUAD_PATCH = 8,
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EVAL_PATCH = 9,
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};
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struct Ref
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{
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__forceinline Ref(void* p = nullptr)
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: ptr((size_t)p) {}
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__forceinline operator bool() const { return ptr != 0; }
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__forceinline operator size_t() const { return ptr; }
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__forceinline Ref (Type ty, void* in)
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: ptr(((size_t)in)+ty) { assert((((size_t)in) & 0xF) == 0); }
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__forceinline Type type () const { return (Type)(ptr & 0xF); }
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__forceinline void* object() const { return (void*) (ptr & ~0xF); }
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size_t ptr;
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};
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struct EvalPatch
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{
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/* creates EvalPatch from a CatmullClarkPatch */
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template<typename Allocator>
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__noinline static Ref create(const Allocator& alloc, const CatmullClarkPatch& patch)
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{
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size_t ofs = 0, bytes = patch.bytes();
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void* ptr = alloc(bytes);
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patch.serialize(ptr,ofs);
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assert(ofs == bytes);
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return Ref(EVAL_PATCH, ptr);
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}
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};
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struct BilinearPatch
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{
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/* creates BilinearPatch from a CatmullClarkPatch */
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template<typename Allocator>
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__noinline static Ref create(const Allocator& alloc, const CatmullClarkPatch& patch,
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const BezierCurve* border0, const BezierCurve* border1, const BezierCurve* border2, const BezierCurve* border3) {
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return Ref(BILINEAR_PATCH, new (alloc(sizeof(BilinearPatch))) BilinearPatch(patch));
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}
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__forceinline BilinearPatch (const CatmullClarkPatch& patch)
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: patch(patch) {}
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/* creates BilinearPatch from 4 vertices */
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template<typename Allocator>
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__noinline static Ref create(const Allocator& alloc, const HalfEdge* edge, const char* vertices, size_t stride) {
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return Ref(BILINEAR_PATCH, new (alloc(sizeof(BilinearPatch))) BilinearPatch(edge,vertices,stride));
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}
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__forceinline BilinearPatch (const HalfEdge* edge, const char* vertices, size_t stride)
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: patch(edge,vertices,stride) {}
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public:
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BilinearPatchT<Vertex,Vertex_t> patch;
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};
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struct BSplinePatch
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{
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/* creates BSplinePatch from a half edge */
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template<typename Allocator>
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__noinline static Ref create(const Allocator& alloc, const HalfEdge* edge, const char* vertices, size_t stride) {
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return Ref(BSPLINE_PATCH, new (alloc(sizeof(BSplinePatch))) BSplinePatch(edge,vertices,stride));
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}
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__forceinline BSplinePatch (const HalfEdge* edge, const char* vertices, size_t stride)
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: patch(edge,vertices,stride) {}
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/* creates BSplinePatch from a CatmullClarkPatch */
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template<typename Allocator>
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__noinline static Ref create(const Allocator& alloc, const CatmullClarkPatch& patch,
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const BezierCurve* border0, const BezierCurve* border1, const BezierCurve* border2, const BezierCurve* border3) {
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return Ref(BSPLINE_PATCH, new (alloc(sizeof(BSplinePatch))) BSplinePatch(patch,border0,border1,border2,border3));
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}
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__forceinline BSplinePatch (const CatmullClarkPatch& patch, const BezierCurve* border0, const BezierCurve* border1, const BezierCurve* border2, const BezierCurve* border3)
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: patch(patch,border0,border1,border2,border3) {}
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public:
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BSplinePatchT<Vertex,Vertex_t> patch;
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};
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struct BezierPatch
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{
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/* creates BezierPatch from a half edge */
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template<typename Allocator>
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__noinline static Ref create(const Allocator& alloc, const HalfEdge* edge, const char* vertices, size_t stride) {
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return Ref(BEZIER_PATCH, new (alloc(sizeof(BezierPatch))) BezierPatch(edge,vertices,stride));
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}
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__forceinline BezierPatch (const HalfEdge* edge, const char* vertices, size_t stride)
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: patch(edge,vertices,stride) {}
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/* creates Bezier from a CatmullClarkPatch */
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template<typename Allocator>
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__noinline static Ref create(const Allocator& alloc, const CatmullClarkPatch& patch,
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const BezierCurve* border0, const BezierCurve* border1, const BezierCurve* border2, const BezierCurve* border3) {
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return Ref(BEZIER_PATCH, new (alloc(sizeof(BezierPatch))) BezierPatch(patch,border0,border1,border2,border3));
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}
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__forceinline BezierPatch (const CatmullClarkPatch& patch, const BezierCurve* border0, const BezierCurve* border1, const BezierCurve* border2, const BezierCurve* border3)
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: patch(patch,border0,border1,border2,border3) {}
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public:
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BezierPatchT<Vertex,Vertex_t> patch;
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};
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struct GregoryPatch
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{
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/* creates GregoryPatch from half edge */
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template<typename Allocator>
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__noinline static Ref create(const Allocator& alloc, const HalfEdge* edge, const char* vertices, size_t stride) {
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return Ref(GREGORY_PATCH, new (alloc(sizeof(GregoryPatch))) GregoryPatch(edge,vertices,stride));
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}
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__forceinline GregoryPatch (const HalfEdge* edge, const char* vertices, size_t stride)
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: patch(CatmullClarkPatch(edge,vertices,stride)) {}
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/* creates GregoryPatch from CatmullClarkPatch */
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template<typename Allocator>
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__noinline static Ref create(const Allocator& alloc, const CatmullClarkPatch& patch,
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const BezierCurve* border0, const BezierCurve* border1, const BezierCurve* border2, const BezierCurve* border3) {
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return Ref(GREGORY_PATCH, new (alloc(sizeof(GregoryPatch))) GregoryPatch(patch,border0,border1,border2,border3));
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}
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__forceinline GregoryPatch (const CatmullClarkPatch& patch, const BezierCurve* border0, const BezierCurve* border1, const BezierCurve* border2, const BezierCurve* border3)
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: patch(patch,border0,border1,border2,border3) {}
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public:
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GregoryPatchT<Vertex,Vertex_t> patch;
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};
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struct SubdividedQuadPatch
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{
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template<typename Allocator>
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__noinline static Ref create(const Allocator& alloc, Ref children[4]) {
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return Ref(SUBDIVIDED_QUAD_PATCH, new (alloc(sizeof(SubdividedQuadPatch))) SubdividedQuadPatch(children));
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}
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__forceinline SubdividedQuadPatch(Ref children[4]) {
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for (size_t i=0; i<4; i++) child[i] = children[i];
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}
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public:
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Ref child[4];
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};
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struct SubdividedGeneralPatch
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{
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template<typename Allocator>
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__noinline static Ref create(const Allocator& alloc, Ref* children, const unsigned N) {
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return Ref(SUBDIVIDED_GENERAL_PATCH, new (alloc(sizeof(SubdividedGeneralPatch))) SubdividedGeneralPatch(children,N));
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}
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__forceinline SubdividedGeneralPatch(Ref* children, const unsigned N) : N(N) {
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for (unsigned i=0; i<N; i++) child[i] = children[i];
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}
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unsigned N;
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Ref child[MAX_PATCH_VALENCE];
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};
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/*! Default constructor. */
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__forceinline PatchT () {}
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template<typename Allocator>
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__noinline static Ref create(const Allocator& alloc, const HalfEdge* edge, const char* vertices, size_t stride)
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{
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if (PATCH_MAX_CACHE_DEPTH == 0)
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return nullptr;
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Ref child(0);
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switch (edge->patch_type) {
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case HalfEdge::BILINEAR_PATCH: child = BilinearPatch::create(alloc,edge,vertices,stride); break;
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case HalfEdge::REGULAR_QUAD_PATCH: child = RegularPatch::create(alloc,edge,vertices,stride); break;
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#if PATCH_USE_GREGORY == 2
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case HalfEdge::IRREGULAR_QUAD_PATCH: child = GregoryPatch::create(alloc,edge,vertices,stride); break;
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#endif
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default: {
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GeneralCatmullClarkPatch patch(edge,vertices,stride);
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child = PatchT::create(alloc,patch,edge,vertices,stride,0);
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}
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}
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return child;
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}
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template<typename Allocator>
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__noinline static Ref create(const Allocator& alloc, GeneralCatmullClarkPatch& patch, const HalfEdge* edge, const char* vertices, size_t stride, size_t depth)
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{
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/* convert into standard quad patch if possible */
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if (likely(patch.isQuadPatch()))
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{
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CatmullClarkPatch qpatch; patch.init(qpatch);
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return PatchT::create(alloc,qpatch,edge,vertices,stride,depth);
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}
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/* do only cache up to some depth */
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if (depth >= PATCH_MAX_CACHE_DEPTH)
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return nullptr;
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/* subdivide patch */
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unsigned N;
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array_t<CatmullClarkPatch,GeneralCatmullClarkPatch::SIZE> patches;
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patch.subdivide(patches,N);
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if (N == 4)
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{
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Ref child[4];
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#if PATCH_USE_GREGORY == 2
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BezierCurve borders[GeneralCatmullClarkPatch::SIZE]; patch.getLimitBorder(borders);
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BezierCurve border0l,border0r; borders[0].subdivide(border0l,border0r);
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BezierCurve border1l,border1r; borders[1].subdivide(border1l,border1r);
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BezierCurve border2l,border2r; borders[2].subdivide(border2l,border2r);
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BezierCurve border3l,border3r; borders[3].subdivide(border3l,border3r);
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GeneralCatmullClarkPatch::fix_quad_ring_order(patches);
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child[0] = PatchT::create(alloc,patches[0],edge,vertices,stride,depth+1,&border0l,nullptr,nullptr,&border3r);
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child[1] = PatchT::create(alloc,patches[1],edge,vertices,stride,depth+1,&border0r,&border1l,nullptr,nullptr);
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child[2] = PatchT::create(alloc,patches[2],edge,vertices,stride,depth+1,nullptr,&border1r,&border2l,nullptr);
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child[3] = PatchT::create(alloc,patches[3],edge,vertices,stride,depth+1,nullptr,nullptr,&border2r,&border3l);
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#else
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GeneralCatmullClarkPatch::fix_quad_ring_order(patches);
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for (size_t i=0; i<4; i++)
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child[i] = PatchT::create(alloc,patches[i],edge,vertices,stride,depth+1);
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#endif
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return SubdividedQuadPatch::create(alloc,child);
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}
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else
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{
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assert(N<MAX_PATCH_VALENCE);
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Ref child[MAX_PATCH_VALENCE];
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#if PATCH_USE_GREGORY == 2
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BezierCurve borders[GeneralCatmullClarkPatch::SIZE];
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patch.getLimitBorder(borders);
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for (size_t i0=0; i0<N; i0++) {
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const size_t i2 = i0==0 ? N-1 : i0-1;
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BezierCurve border0l,border0r; borders[i0].subdivide(border0l,border0r);
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BezierCurve border2l,border2r; borders[i2].subdivide(border2l,border2r);
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child[i0] = PatchT::create(alloc,patches[i0],edge,vertices,stride,depth+1, &border0l, nullptr, nullptr, &border2r);
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}
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#else
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for (size_t i=0; i<N; i++)
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child[i] = PatchT::create(alloc,patches[i],edge,vertices,stride,depth+1);
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#endif
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return SubdividedGeneralPatch::create(alloc,child,N);
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}
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return nullptr;
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}
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static __forceinline bool final(const CatmullClarkPatch& patch, const typename CatmullClarkRing::Type type, size_t depth)
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{
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const size_t max_eval_depth = (type & CatmullClarkRing::TYPE_CREASES) ? PATCH_MAX_EVAL_DEPTH_CREASE : PATCH_MAX_EVAL_DEPTH_IRREGULAR;
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//#if PATCH_MIN_RESOLUTION
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// return patch.isFinalResolution(PATCH_MIN_RESOLUTION) || depth>=max_eval_depth;
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//#else
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return depth>=max_eval_depth;
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//#endif
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}
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template<typename Allocator>
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__noinline static Ref create(const Allocator& alloc, CatmullClarkPatch& patch, const HalfEdge* edge, const char* vertices, size_t stride, size_t depth,
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const BezierCurve* border0 = nullptr, const BezierCurve* border1 = nullptr, const BezierCurve* border2 = nullptr, const BezierCurve* border3 = nullptr)
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{
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const typename CatmullClarkPatch::Type ty = patch.type();
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if (unlikely(final(patch,ty,depth))) {
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if (ty & CatmullClarkRing::TYPE_REGULAR) return RegularPatch::create(alloc,patch,border0,border1,border2,border3);
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else return IrregularFillPatch::create(alloc,patch,border0,border1,border2,border3);
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}
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else if (ty & CatmullClarkRing::TYPE_REGULAR_CREASES) {
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assert(depth > 0); return RegularPatch::create(alloc,patch,border0,border1,border2,border3);
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}
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#if PATCH_USE_GREGORY == 2
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else if (ty & CatmullClarkRing::TYPE_GREGORY_CREASES) {
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assert(depth > 0); return GregoryPatch::create(alloc,patch,border0,border1,border2,border3);
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}
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#endif
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else if (depth >= PATCH_MAX_CACHE_DEPTH) {
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return EvalPatch::create(alloc,patch);
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}
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else
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{
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Ref child[4];
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array_t<CatmullClarkPatch,4> patches;
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patch.subdivide(patches);
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for (size_t i=0; i<4; i++)
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child[i] = PatchT::create(alloc,patches[i],edge,vertices,stride,depth+1);
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return SubdividedQuadPatch::create(alloc,child);
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}
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}
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};
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typedef PatchT<Vec3fa,Vec3fa_t> Patch3fa;
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}
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