1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
// Copyright 2009-2020 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include "patch.h"
#include "feature_adaptive_eval.h"
namespace embree
{
namespace isa
{
template<typename Vertex, typename Vertex_t = Vertex>
struct PatchEval
{
public:
typedef PatchT<Vertex,Vertex_t> Patch;
typedef typename Patch::Ref Ref;
typedef CatmullClarkPatchT<Vertex,Vertex_t> CatmullClarkPatch;
PatchEval (SharedLazyTessellationCache::CacheEntry& entry, size_t commitCounter,
const HalfEdge* edge, const char* vertices, size_t stride, const float u, const float v,
Vertex* P, Vertex* dPdu, Vertex* dPdv, Vertex* ddPdudu, Vertex* ddPdvdv, Vertex* ddPdudv)
: P(P), dPdu(dPdu), dPdv(dPdv), ddPdudu(ddPdudu), ddPdvdv(ddPdvdv), ddPdudv(ddPdudv)
{
/* conservative time for the very first allocation */
auto time = SharedLazyTessellationCache::sharedLazyTessellationCache.getTime(commitCounter);
Ref patch = SharedLazyTessellationCache::lookup(entry,commitCounter,[&] () {
auto alloc = [&](size_t bytes) { return SharedLazyTessellationCache::malloc(bytes); };
return Patch::create(alloc,edge,vertices,stride);
},true);
auto curTime = SharedLazyTessellationCache::sharedLazyTessellationCache.getTime(commitCounter);
const bool allAllocationsValid = SharedLazyTessellationCache::validTime(time,curTime);
if (patch && allAllocationsValid && eval(patch,u,v,1.0f,0)) {
SharedLazyTessellationCache::unlock();
return;
}
SharedLazyTessellationCache::unlock();
FeatureAdaptiveEval<Vertex,Vertex_t>(edge,vertices,stride,u,v,P,dPdu,dPdv,ddPdudu,ddPdvdv,ddPdudv);
PATCH_DEBUG_SUBDIVISION(edge,c,-1,-1);
}
__forceinline bool eval_quad(const typename Patch::SubdividedQuadPatch* This, const float u, const float v, const float dscale, const size_t depth)
{
if (v < 0.5f) {
if (u < 0.5f) return eval(This->child[0],2.0f*u,2.0f*v,2.0f*dscale,depth+1);
else return eval(This->child[1],2.0f*u-1.0f,2.0f*v,2.0f*dscale,depth+1);
} else {
if (u > 0.5f) return eval(This->child[2],2.0f*u-1.0f,2.0f*v-1.0f,2.0f*dscale,depth+1);
else return eval(This->child[3],2.0f*u,2.0f*v-1.0f,2.0f*dscale,depth+1);
}
}
bool eval_general(const typename Patch::SubdividedGeneralPatch* This, const float U, const float V, const size_t depth)
{
const unsigned l = (unsigned) floor(0.5f*U); const float u = 2.0f*frac(0.5f*U)-0.5f;
const unsigned h = (unsigned) floor(0.5f*V); const float v = 2.0f*frac(0.5f*V)-0.5f;
const unsigned i = 4*h+l; assert(i<This->N);
return eval(This->child[i],u,v,1.0f,depth+1);
}
bool eval(Ref This, const float& u, const float& v, const float dscale, const size_t depth)
{
if (!This) return false;
//PRINT(depth);
//PRINT2(u,v);
switch (This.type())
{
case Patch::BILINEAR_PATCH: {
//PRINT("bilinear");
((typename Patch::BilinearPatch*)This.object())->patch.eval(u,v,P,dPdu,dPdv,ddPdudu,ddPdvdv,ddPdudv,dscale);
PATCH_DEBUG_SUBDIVISION(This,-1,c,c);
return true;
}
case Patch::BSPLINE_PATCH: {
//PRINT("bspline");
((typename Patch::BSplinePatch*)This.object())->patch.eval(u,v,P,dPdu,dPdv,ddPdudu,ddPdvdv,ddPdudv,dscale);
PATCH_DEBUG_SUBDIVISION(This,-1,c,-1);
return true;
}
case Patch::BEZIER_PATCH: {
//PRINT("bezier");
((typename Patch::BezierPatch*)This.object())->patch.eval(u,v,P,dPdu,dPdv,ddPdudu,ddPdvdv,ddPdudv,dscale);
PATCH_DEBUG_SUBDIVISION(This,-1,c,-1);
return true;
}
case Patch::GREGORY_PATCH: {
//PRINT("gregory");
((typename Patch::GregoryPatch*)This.object())->patch.eval(u,v,P,dPdu,dPdv,ddPdudu,ddPdvdv,ddPdudv,dscale);
PATCH_DEBUG_SUBDIVISION(This,-1,-1,c);
return true;
}
case Patch::SUBDIVIDED_QUAD_PATCH: {
//PRINT("subdivided quad");
return eval_quad(((typename Patch::SubdividedQuadPatch*)This.object()),u,v,dscale,depth);
}
case Patch::SUBDIVIDED_GENERAL_PATCH: {
//PRINT("general_patch");
assert(dscale == 1.0f);
return eval_general(((typename Patch::SubdividedGeneralPatch*)This.object()),u,v,depth);
}
case Patch::EVAL_PATCH: {
//PRINT("eval_patch");
CatmullClarkPatch patch; patch.deserialize(This.object());
FeatureAdaptiveEval<Vertex,Vertex_t>(patch,u,v,dscale,depth,P,dPdu,dPdv,ddPdudu,ddPdvdv,ddPdudv);
return true;
}
default:
assert(false);
return false;
}
}
private:
Vertex* const P;
Vertex* const dPdu;
Vertex* const dPdv;
Vertex* const ddPdudu;
Vertex* const ddPdvdv;
Vertex* const ddPdudv;
};
}
}
|