1// Copyright 2009-2021 Intel Corporation
2// SPDX-License-Identifier: Apache-2.0
3
4#pragma once
5
6#include "curveNi.h"
7
8namespace embree
9{
10 template<int M>
11 struct CurveNv : public CurveNi<M>
12 {
13 using CurveNi<M>::N;
14
15 struct Type : public PrimitiveType {
16 const char* name() const;
17 size_t sizeActive(const char* This) const;
18 size_t sizeTotal(const char* This) const;
19 size_t getBytes(const char* This) const;
20 };
21 static Type type;
22
23 public:
24
25 /* Returns maximum number of stored primitives */
26 static __forceinline size_t max_size() { return M; }
27
28 /* Returns required number of primitive blocks for N primitives */
29 static __forceinline size_t blocks(size_t N) { return (N+M-1)/M; }
30
31 static __forceinline size_t bytes(size_t N)
32 {
33 const size_t f = N/M, r = N%M;
34 static_assert(sizeof(CurveNv) == 22+25*M+4*16*M, "internal data layout issue");
35 return f*sizeof(CurveNv) + (r!=0)*(22 + 25*r + 4*16*r);
36 }
37
38 public:
39
40 /*! Default constructor. */
41 __forceinline CurveNv () {}
42
43 /*! fill curve from curve list */
44 __forceinline void fill(const PrimRef* prims, size_t& begin, size_t _end, Scene* scene)
45 {
46 size_t end = min(a: begin+M,b: _end);
47 size_t N = end-begin;
48
49 /* encode all primitives */
50 for (size_t i=0; i<N; i++)
51 {
52 const PrimRef& prim = prims[begin+i];
53 const unsigned int geomID = prim.geomID();
54 const unsigned int primID = prim.primID();
55 CurveGeometry* mesh = (CurveGeometry*) scene->get(i: geomID);
56 const unsigned vtxID = mesh->curve(i: primID);
57 Vec3fa::storeu(ptr: &this->vertices(i,N)[0],v: mesh->vertex(i: vtxID+0));
58 Vec3fa::storeu(ptr: &this->vertices(i,N)[1],v: mesh->vertex(i: vtxID+1));
59 Vec3fa::storeu(ptr: &this->vertices(i,N)[2],v: mesh->vertex(i: vtxID+2));
60 Vec3fa::storeu(ptr: &this->vertices(i,N)[3],v: mesh->vertex(i: vtxID+3));
61 }
62 }
63
64 template<typename BVH, typename Allocator>
65 __forceinline static typename BVH::NodeRef createLeaf (BVH* bvh, const PrimRef* prims, const range<size_t>& set, const Allocator& alloc)
66 {
67 if (set.size() == 0)
68 return BVH::emptyNode;
69
70 /* fall back to CurveNi for oriented curves */
71 unsigned int geomID = prims[set.begin()].geomID();
72 if (bvh->scene->get(geomID)->getCurveType() == Geometry::GTY_SUBTYPE_ORIENTED_CURVE) {
73 return CurveNi<M>::createLeaf(bvh,prims,set,alloc);
74 }
75 if (bvh->scene->get(geomID)->getCurveBasis() == Geometry::GTY_BASIS_HERMITE) {
76 return CurveNi<M>::createLeaf(bvh,prims,set,alloc);
77 }
78
79 size_t start = set.begin();
80 size_t items = CurveNv::blocks(N: set.size());
81 size_t numbytes = CurveNv::bytes(N: set.size());
82 CurveNv* accel = (CurveNv*) alloc.malloc1(numbytes,BVH::byteAlignment);
83 for (size_t i=0; i<items; i++) {
84 accel[i].CurveNv<M>::fill(prims,start,set.end(),bvh->scene);
85 accel[i].CurveNi<M>::fill(prims,start,set.end(),bvh->scene);
86 }
87 return bvh->encodeLeaf((char*)accel,items);
88 };
89
90 public:
91 unsigned char data[4*16*M];
92 __forceinline Vec3fa* vertices(size_t i, size_t N) { return (Vec3fa*)CurveNi<M>::end(N)+4*i; }
93 __forceinline const Vec3fa* vertices(size_t i, size_t N) const { return (Vec3fa*)CurveNi<M>::end(N)+4*i; }
94 };
95
96 template<int M>
97 typename CurveNv<M>::Type CurveNv<M>::type;
98
99 typedef CurveNv<4> Curve4v;
100 typedef CurveNv<8> Curve8v;
101}
102

source code of qtquick3d/src/3rdparty/embree/kernels/geometry/curveNv.h