1// Copyright 2009-2021 Intel Corporation
2// SPDX-License-Identifier: Apache-2.0
3
4#pragma once
5
6#include "../common/default.h"
7#include "../common/primref.h"
8#include "../common/primref_mb.h"
9
10namespace embree
11{
12 // FIXME: maybe there's a better place for this util fct
13 __forceinline float areaProjectedTriangle(const Vec3fa& v0, const Vec3fa& v1, const Vec3fa& v2)
14 {
15 const Vec3fa e0 = v1-v0;
16 const Vec3fa e1 = v2-v0;
17 const Vec3fa d = cross(a: e0,b: e1);
18 return fabs(x: d.x) + fabs(x: d.y) + fabs(x: d.z);
19 }
20
21 //namespace isa
22 //{
23 template<typename BBox>
24 class CentGeom
25 {
26 public:
27 __forceinline CentGeom () {}
28
29 __forceinline CentGeom (EmptyTy)
30 : geomBounds(empty), centBounds(empty) {}
31
32 __forceinline CentGeom (const BBox& geomBounds, const BBox3fa& centBounds)
33 : geomBounds(geomBounds), centBounds(centBounds) {}
34
35 template<typename PrimRef>
36 __forceinline void extend_primref(const PrimRef& prim)
37 {
38 BBox bounds; Vec3fa center;
39 prim.binBoundsAndCenter(bounds,center);
40 geomBounds.extend(bounds);
41 centBounds.extend(other: center);
42 }
43
44 template<typename PrimRef>
45 __forceinline void extend_center2(const PrimRef& prim)
46 {
47 BBox3fa bounds = prim.bounds();
48 geomBounds.extend(bounds);
49 centBounds.extend(other: bounds.center2());
50 }
51
52 __forceinline void extend(const BBox& geomBounds_) {
53 geomBounds.extend(geomBounds_);
54 centBounds.extend(center2(geomBounds_));
55 }
56
57 __forceinline void merge(const CentGeom& other)
58 {
59 geomBounds.extend(other.geomBounds);
60 centBounds.extend(other.centBounds);
61 }
62
63 static __forceinline const CentGeom merge2(const CentGeom& a, const CentGeom& b) {
64 CentGeom r = a; r.merge(b); return r;
65 }
66
67 public:
68 BBox geomBounds; //!< geometry bounds of primitives
69 BBox3fa centBounds; //!< centroid bounds of primitives
70 };
71
72 typedef CentGeom<BBox3fa> CentGeomBBox3fa;
73
74 /*! stores bounding information for a set of primitives */
75 template<typename BBox>
76 class PrimInfoT : public CentGeom<BBox>
77 {
78 public:
79 using CentGeom<BBox>::geomBounds;
80 using CentGeom<BBox>::centBounds;
81
82 __forceinline PrimInfoT () {}
83
84 __forceinline PrimInfoT (EmptyTy)
85 : CentGeom<BBox>(empty), begin(0), end(0) {}
86
87 __forceinline PrimInfoT (size_t begin, size_t end, const CentGeomBBox3fa& centGeomBounds)
88 : CentGeom<BBox>(centGeomBounds), begin(begin), end(end) {}
89
90 template<typename PrimRef>
91 __forceinline void add_primref(const PrimRef& prim)
92 {
93 CentGeom<BBox>::extend_primref(prim);
94 end++;
95 }
96
97 template<typename PrimRef>
98 __forceinline void add_center2(const PrimRef& prim) {
99 CentGeom<BBox>::extend_center2(prim);
100 end++;
101 }
102
103 template<typename PrimRef>
104 __forceinline void add_center2(const PrimRef& prim, const size_t i) {
105 CentGeom<BBox>::extend_center2(prim);
106 end+=i;
107 }
108
109 /*__forceinline void add(const BBox& geomBounds_) {
110 CentGeom<BBox>::extend(geomBounds_);
111 end++;
112 }
113
114 __forceinline void add(const BBox& geomBounds_, const size_t i) {
115 CentGeom<BBox>::extend(geomBounds_);
116 end+=i;
117 }*/
118
119 __forceinline void merge(const PrimInfoT& other)
120 {
121 CentGeom<BBox>::merge(other);
122 begin += other.begin;
123 end += other.end;
124 }
125
126 static __forceinline const PrimInfoT merge(const PrimInfoT& a, const PrimInfoT& b) {
127 PrimInfoT r = a; r.merge(b); return r;
128 }
129
130 /*! returns the number of primitives */
131 __forceinline size_t size() const {
132 return end-begin;
133 }
134
135 __forceinline float halfArea() {
136 return expectedApproxHalfArea(geomBounds);
137 }
138
139 __forceinline float leafSAH() const {
140 return expectedApproxHalfArea(geomBounds)*float(size());
141 //return halfArea(geomBounds)*blocks(num);
142 }
143
144 __forceinline float leafSAH(size_t block_shift) const {
145 return expectedApproxHalfArea(geomBounds)*float((size()+(size_t(1)<<block_shift)-1) >> block_shift);
146 //return halfArea(geomBounds)*float((num+3) >> 2);
147 //return halfArea(geomBounds)*blocks(num);
148 }
149
150 /*! stream output */
151 friend embree_ostream operator<<(embree_ostream cout, const PrimInfoT& pinfo) {
152 return cout << "PrimInfo { begin = " << pinfo.begin << ", end = " << pinfo.end << ", geomBounds = " << pinfo.geomBounds << ", centBounds = " << pinfo.centBounds << "}";
153 }
154
155 public:
156 size_t begin,end; //!< number of primitives
157 };
158
159 typedef PrimInfoT<BBox3fa> PrimInfo;
160 //typedef PrimInfoT<LBBox3fa> PrimInfoMB;
161
162 /*! stores bounding information for a set of primitives */
163 template<typename BBox>
164 class PrimInfoMBT : public CentGeom<BBox>
165 {
166 public:
167 using CentGeom<BBox>::geomBounds;
168 using CentGeom<BBox>::centBounds;
169
170 __forceinline PrimInfoMBT () {
171 }
172
173 __forceinline PrimInfoMBT (EmptyTy)
174 : CentGeom<BBox>(empty), object_range(0,0), num_time_segments(0), max_num_time_segments(0), max_time_range(0.0f,1.0f), time_range(1.0f,0.0f) {}
175
176 __forceinline PrimInfoMBT (size_t begin, size_t end)
177 : CentGeom<BBox>(empty), object_range(begin,end), num_time_segments(0), max_num_time_segments(0), max_time_range(0.0f,1.0f), time_range(1.0f,0.0f) {}
178
179 template<typename PrimRef>
180 __forceinline void add_primref(const PrimRef& prim)
181 {
182 CentGeom<BBox>::extend_primref(prim);
183 time_range.extend(prim.time_range);
184 object_range._end++;
185 num_time_segments += prim.size();
186 if (max_num_time_segments < prim.totalTimeSegments()) {
187 max_num_time_segments = prim.totalTimeSegments();
188 max_time_range = prim.time_range;
189 }
190 }
191
192 __forceinline void merge(const PrimInfoMBT& other)
193 {
194 CentGeom<BBox>::merge(other);
195 time_range.extend(other.time_range);
196 object_range._begin += other.object_range.begin();
197 object_range._end += other.object_range.end();
198 num_time_segments += other.num_time_segments;
199 if (max_num_time_segments < other.max_num_time_segments) {
200 max_num_time_segments = other.max_num_time_segments;
201 max_time_range = other.max_time_range;
202 }
203 }
204
205 static __forceinline const PrimInfoMBT merge2(const PrimInfoMBT& a, const PrimInfoMBT& b) {
206 PrimInfoMBT r = a; r.merge(b); return r;
207 }
208
209 __forceinline size_t begin() const {
210 return object_range.begin();
211 }
212
213 __forceinline size_t end() const {
214 return object_range.end();
215 }
216
217 /*! returns the number of primitives */
218 __forceinline size_t size() const {
219 return object_range.size();
220 }
221
222 __forceinline float halfArea() const {
223 return time_range.size()*expectedApproxHalfArea(geomBounds);
224 }
225
226 __forceinline float leafSAH() const {
227 return time_range.size()*expectedApproxHalfArea(geomBounds)*float(num_time_segments);
228 }
229
230 __forceinline float leafSAH(size_t block_shift) const {
231 return time_range.size()*expectedApproxHalfArea(geomBounds)*float((num_time_segments+(size_t(1)<<block_shift)-1) >> block_shift);
232 }
233
234 __forceinline float align_time(float ct) const
235 {
236 //return roundf(ct * float(numTimeSegments)) / float(numTimeSegments);
237 float t0 = (ct-max_time_range.lower)/max_time_range.size();
238 float t1 = roundf(x: t0 * float(max_num_time_segments)) / float(max_num_time_segments);
239 return t1*max_time_range.size()+max_time_range.lower;
240 }
241
242 /*! stream output */
243 friend embree_ostream operator<<(embree_ostream cout, const PrimInfoMBT& pinfo)
244 {
245 return cout << "PrimInfo { " <<
246 "object_range = " << pinfo.object_range <<
247 ", time_range = " << pinfo.time_range <<
248 ", time_segments = " << pinfo.num_time_segments <<
249 ", geomBounds = " << pinfo.geomBounds <<
250 ", centBounds = " << pinfo.centBounds <<
251 "}";
252 }
253
254 public:
255 range<size_t> object_range; //!< primitive range
256 size_t num_time_segments; //!< total number of time segments of all added primrefs
257 size_t max_num_time_segments; //!< maximum number of time segments of a primitive
258 BBox1f max_time_range; //!< time range of primitive with max_num_time_segments
259 BBox1f time_range; //!< merged time range of primitives when merging prims, or additionally clipped with build time range when used in SetMB
260 };
261
262 typedef PrimInfoMBT<typename PrimRefMB::BBox> PrimInfoMB;
263
264 struct SetMB : public PrimInfoMB
265 {
266 static const size_t PARALLEL_THRESHOLD = 3 * 1024;
267 static const size_t PARALLEL_FIND_BLOCK_SIZE = 1024;
268 static const size_t PARALLEL_PARTITION_BLOCK_SIZE = 128;
269
270 typedef mvector<PrimRefMB>* PrimRefVector;
271
272 __forceinline SetMB() {}
273
274 __forceinline SetMB(const PrimInfoMB& pinfo_i, PrimRefVector prims)
275 : PrimInfoMB(pinfo_i), prims(prims) {}
276
277 __forceinline SetMB(const PrimInfoMB& pinfo_i, PrimRefVector prims, range<size_t> object_range_in, BBox1f time_range_in)
278 : PrimInfoMB(pinfo_i), prims(prims)
279 {
280 object_range = object_range_in;
281 time_range = intersect(a: time_range,b: time_range_in);
282 }
283
284 __forceinline SetMB(const PrimInfoMB& pinfo_i, PrimRefVector prims, BBox1f time_range_in)
285 : PrimInfoMB(pinfo_i), prims(prims)
286 {
287 time_range = intersect(a: time_range,b: time_range_in);
288 }
289
290 void deterministic_order() const
291 {
292 /* required as parallel partition destroys original primitive order */
293 PrimRefMB* prim = prims->data();
294 std::sort(first: &prim[object_range.begin()],last: &prim[object_range.end()]);
295 }
296
297 template<typename RecalculatePrimRef>
298 __forceinline LBBox3fa linearBounds(const RecalculatePrimRef& recalculatePrimRef) const
299 {
300 auto reduce = [&](const range<size_t>& r) -> LBBox3fa
301 {
302 LBBox3fa cbounds(empty);
303 for (size_t j = r.begin(); j < r.end(); j++)
304 {
305 PrimRefMB& ref = (*prims)[j];
306 const LBBox3fa bn = recalculatePrimRef.linearBounds(ref, time_range);
307 cbounds.extend(other: bn);
308 };
309 return cbounds;
310 };
311
312 return parallel_reduce(object_range.begin(), object_range.end(), PARALLEL_FIND_BLOCK_SIZE, PARALLEL_THRESHOLD, LBBox3fa(empty),
313 reduce,
314 [&](const LBBox3fa& b0, const LBBox3fa& b1) -> LBBox3fa { return embree::merge(a: b0, b: b1); });
315 }
316
317 template<typename RecalculatePrimRef>
318 __forceinline LBBox3fa linearBounds(const RecalculatePrimRef& recalculatePrimRef, const LinearSpace3fa& space) const
319 {
320 auto reduce = [&](const range<size_t>& r) -> LBBox3fa
321 {
322 LBBox3fa cbounds(empty);
323 for (size_t j = r.begin(); j < r.end(); j++)
324 {
325 PrimRefMB& ref = (*prims)[j];
326 const LBBox3fa bn = recalculatePrimRef.linearBounds(ref, time_range, space);
327 cbounds.extend(other: bn);
328 };
329 return cbounds;
330 };
331
332 return parallel_reduce(object_range.begin(), object_range.end(), PARALLEL_FIND_BLOCK_SIZE, PARALLEL_THRESHOLD, LBBox3fa(empty),
333 reduce,
334 [&](const LBBox3fa& b0, const LBBox3fa& b1) -> LBBox3fa { return embree::merge(a: b0, b: b1); });
335 }
336
337 template<typename RecalculatePrimRef>
338 const SetMB primInfo(const RecalculatePrimRef& recalculatePrimRef, const LinearSpace3fa& space) const
339 {
340 auto computePrimInfo = [&](const range<size_t>& r) -> PrimInfoMB
341 {
342 PrimInfoMB pinfo(empty);
343 for (size_t j=r.begin(); j<r.end(); j++)
344 {
345 PrimRefMB& ref = (*prims)[j];
346 PrimRefMB ref1 = recalculatePrimRef(ref,time_range,space);
347 pinfo.add_primref(prim: ref1);
348 };
349 return pinfo;
350 };
351
352 const PrimInfoMB pinfo = parallel_reduce(object_range.begin(), object_range.end(), PARALLEL_FIND_BLOCK_SIZE, PARALLEL_THRESHOLD,
353 PrimInfoMB(empty), computePrimInfo, PrimInfoMB::merge2);
354
355 return SetMB(pinfo,prims,object_range,time_range);
356 }
357
358 public:
359 PrimRefVector prims;
360 };
361//}
362}
363

source code of qtquick3d/src/3rdparty/embree/kernels/builders/priminfo.h