OpenVDB 11.0.0

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Ray.h
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1// Copyright Contributors to the OpenVDB Project
2// SPDX-License-Identifier: MPL-2.0
3
4/// @file Ray.h
5///
6/// @author Ken Museth
7///
8/// @brief A Ray class.
9
10#ifndef NANOVDB_RAY_H_HAS_BEEN_INCLUDED
11#define NANOVDB_RAY_H_HAS_BEEN_INCLUDED
12
13#include <nanovdb/NanoVDB.h> // for Vec3
14
15 namespace nanovdb {
16
17 template<typename RealT>
18 class Ray
19{
20 public:
21 using RealType = RealT;
22 using Vec3Type = Vec3<RealT>;
23 using Vec3T = Vec3Type;
24
25 struct TimeSpan
26 {
27 RealT t0, t1;
28 /// @brief Default constructor
29 __hostdev__ TimeSpan() {}
30 /// @brief Constructor
31 __hostdev__ TimeSpan(RealT _t0, RealT _t1)
32 : t0(_t0)
33 , t1(_t1)
34 {
35 }
36 /// @brief Set both times
37 __hostdev__ void set(RealT _t0, RealT _t1)
38 {
39 t0 = _t0;
40 t1 = _t1;
41 }
42 /// @brief Get both times
43 __hostdev__ void get(RealT& _t0, RealT& _t1) const
44 {
45 _t0 = t0;
46 _t1 = t1;
47 }
48 /// @brief Return @c true if t1 is larger than t0 by at least eps.
49 __hostdev__ bool valid(RealT eps = Delta<RealT>::value()) const { return (t1 - t0) > eps; }
50 /// @brief Return the midpoint of the ray.
51 __hostdev__ RealT mid() const { return 0.5 * (t0 + t1); }
52 /// @brief Multiplies both times
53 __hostdev__ void scale(RealT s)
54 {
55 assert(s > 0);
56 t0 *= s;
57 t1 *= s;
58 }
59 /// @brief Return @c true if time is inclusive
60 __hostdev__ bool test(RealT t) const { return (t >= t0 && t <= t1); }
61 };
62
63 __hostdev__ Ray(const Vec3Type& eye = Vec3Type(0, 0, 0),
64 const Vec3Type& direction = Vec3Type(1, 0, 0),
65 RealT t0 = Delta<RealT>::value(),
66 RealT t1 = Maximum<RealT>::value())
67 : mEye(eye)
68 , mDir(direction)
69 , mInvDir(1 / mDir[0], 1 / mDir[1], 1 / mDir[2])
70 , mTimeSpan(t0, t1)
71 , mSign{mInvDir[0] < 0, mInvDir[1] < 0, mInvDir[2] < 0}
72 {
73 }
74
75 __hostdev__ Ray& offsetEye(RealT offset)
76 {
77 mEye[0] += offset;
78 mEye[1] += offset;
79 mEye[2] += offset;
80 return *this;
81 }
82
83 __hostdev__ Ray& setEye(const Vec3Type& eye)
84 {
85 mEye = eye;
86 return *this;
87 }
88
89 __hostdev__ Ray& setDir(const Vec3Type& dir)
90 {
91 mDir = dir;
92 mInvDir[0] = 1.0 / mDir[0];
93 mInvDir[1] = 1.0 / mDir[1];
94 mInvDir[2] = 1.0 / mDir[2];
95 mSign[0] = mInvDir[0] < 0;
96 mSign[1] = mInvDir[1] < 0;
97 mSign[2] = mInvDir[2] < 0;
98 return *this;
99 }
100
101 __hostdev__ Ray& setMinTime(RealT t0)
102 {
103 mTimeSpan.t0 = t0;
104 return *this;
105 }
106
107 __hostdev__ Ray& setMaxTime(RealT t1)
108 {
109 mTimeSpan.t1 = t1;
110 return *this;
111 }
112
113 __hostdev__ Ray& setTimes(
114 RealT t0 = Delta<RealT>::value(),
115 RealT t1 = Maximum<RealT>::value())
116 {
117 assert(t0 > 0 && t1 > 0);
118 mTimeSpan.set(t0, t1);
119 return *this;
120 }
121
122 __hostdev__ Ray& scaleTimes(RealT scale)
123 {
124 mTimeSpan.scale(scale);
125 return *this;
126 }
127
128 __hostdev__ Ray& reset(
129 const Vec3Type& eye,
130 const Vec3Type& direction,
131 RealT t0 = Delta<RealT>::value(),
132 RealT t1 = Maximum<RealT>::value())
133 {
134 this->setEye(eye);
135 this->setDir(direction);
136 this->setTimes(t0, t1);
137 return *this;
138 }
139
140 __hostdev__ const Vec3T& eye() const { return mEye; }
141
142 __hostdev__ const Vec3T& dir() const { return mDir; }
143
144 __hostdev__ const Vec3T& invDir() const { return mInvDir; }
145
146 __hostdev__ RealT t0() const { return mTimeSpan.t0; }
147
148 __hostdev__ RealT t1() const { return mTimeSpan.t1; }
149
150 __hostdev__ int sign(int i) const { return mSign[i]; }
151
152 /// @brief Return the position along the ray at the specified time.
153 __hostdev__ Vec3T operator()(RealT time) const
154 {
155#if 1
156 return Vec3T(fmaf(time, mDir[0], mEye[0]),
157 fmaf(time, mDir[1], mEye[1]),
158 fmaf(time, mDir[2], mEye[2]));
159#else
160 return mEye + mDir * time;
161#endif
162 }
163
164 /// @brief Return the starting point of the ray.
165 __hostdev__ Vec3T start() const { return (*this)(mTimeSpan.t0); }
166
167 /// @brief Return the endpoint of the ray.
168 __hostdev__ Vec3T end() const { return (*this)(mTimeSpan.t1); }
169
170 /// @brief Return the midpoint of the ray.
171 __hostdev__ Vec3T mid() const { return (*this)(mTimeSpan.mid()); }
172
173 /// @brief Return @c true if t1 is larger than t0 by at least eps.
174 __hostdev__ bool valid(RealT eps = Delta<float>::value()) const { return mTimeSpan.valid(eps); }
175
176 /// @brief Return @c true if @a time is within t0 and t1, both inclusive.
177 __hostdev__ bool test(RealT time) const { return mTimeSpan.test(time); }
178
179 /// @brief Return a new Ray that is transformed with the specified map.
180 ///
181 /// @param map the map from which to construct the new Ray.
182 ///
183 /// @warning Assumes a linear map and a normalized direction.
184 ///
185 /// @details The requirement that the direction is normalized
186 /// follows from the transformation of t0 and t1 - and that fact that
187 /// we want applyMap and applyInverseMap to be inverse operations.
188 template<typename MapType>
189 __hostdev__ Ray applyMap(const MapType& map) const
190 {
191 const Vec3T eye = map.applyMap(mEye);
192 const Vec3T dir = map.applyJacobian(mDir);
193 const RealT length = dir.length(), invLength = RealT(1) / length;
194 RealT t1 = mTimeSpan.t1;
195 if (mTimeSpan.t1 < Maximum<RealT>::value()) {
196 t1 *= length;
197 }
198 return Ray(eye, dir * invLength, length * mTimeSpan.t0, t1);
199 }
200 template<typename MapType>
201 __hostdev__ Ray applyMapF(const MapType& map) const
202 {
203 const Vec3T eye = map.applyMapF(mEye);
204 const Vec3T dir = map.applyJacobianF(mDir);
205 const RealT length = dir.length(), invLength = RealT(1) / length;
206 RealT t1 = mTimeSpan.t1;
207 if (mTimeSpan.t1 < Maximum<RealT>::value()) {
208 t1 *= length;
209 }
210 return Ray(eye, dir * invLength, length * mTimeSpan.t0, t1);
211 }
212
213 /// @brief Return a new Ray that is transformed with the inverse of the specified map.
214 ///
215 /// @param map the map from which to construct the new Ray by inverse mapping.
216 ///
217 /// @warning Assumes a linear map and a normalized direction.
218 ///
219 /// @details The requirement that the direction is normalized
220 /// follows from the transformation of t0 and t1 - and that fact that
221 /// we want applyMap and applyInverseMap to be inverse operations.
222 template<typename MapType>
223 __hostdev__ Ray applyInverseMap(const MapType& map) const
224 {
225 const Vec3T eye = map.applyInverseMap(mEye);
226 const Vec3T dir = map.applyInverseJacobian(mDir);
227 const RealT length = dir.length(), invLength = RealT(1) / length;
228 return Ray(eye, dir * invLength, length * mTimeSpan.t0, length * mTimeSpan.t1);
229 }
230 template<typename MapType>
231 __hostdev__ Ray applyInverseMapF(const MapType& map) const
232 {
233 const Vec3T eye = map.applyInverseMapF(mEye);
234 const Vec3T dir = map.applyInverseJacobianF(mDir);
235 const RealT length = dir.length(), invLength = RealT(1) / length;
236 return Ray(eye, dir * invLength, length * mTimeSpan.t0, length * mTimeSpan.t1);
237 }
238
239 /// @brief Return a new ray in world space, assuming the existing
240 /// ray is represented in the index space of the specified grid.
241 template<typename GridType>
242 __hostdev__ Ray indexToWorldF(const GridType& grid) const
243 {
244 const Vec3T eye = grid.indexToWorldF(mEye);
245 const Vec3T dir = grid.indexToWorldDirF(mDir);
246 const RealT length = dir.length(), invLength = RealT(1) / length;
247 RealT t1 = mTimeSpan.t1;
248 if (mTimeSpan.t1 < Maximum<RealT>::value()) {
249 t1 *= length;
250 }
251 return Ray(eye, dir * invLength, length * mTimeSpan.t0, t1);
252 }
253
254 /// @brief Return a new ray in index space, assuming the existing
255 /// ray is represented in the world space of the specified grid.
256 template<typename GridType>
257 __hostdev__ Ray worldToIndexF(const GridType& grid) const
258 {
259 const Vec3T eye = grid.worldToIndexF(mEye);
260 const Vec3T dir = grid.worldToIndexDirF(mDir);
261 const RealT length = dir.length(), invLength = RealT(1) / length;
262 RealT t1 = mTimeSpan.t1;
263 if (mTimeSpan.t1 < Maximum<RealT>::value()) {
264 t1 *= length;
265 }
266 return Ray(eye, dir * invLength, length * mTimeSpan.t0, t1);
267 }
268
269 /// @brief Return true if this ray intersects the specified sphere.
270 ///
271 /// @param center The center of the sphere in the same space as this ray.
272 /// @param radius The radius of the sphere in the same units as this ray.
273 /// @param t0 The first intersection point if an intersection exists.
274 /// @param t1 The second intersection point if an intersection exists.
275 ///
276 /// @note If the return value is true, i.e. a hit, and t0 =
277 /// this->t0() or t1 == this->t1() only one true intersection exist.
278 __hostdev__ bool intersects(const Vec3T& center, RealT radius, RealT& t0, RealT& t1) const
279 {
280 const Vec3T origin = mEye - center;
281 const RealT A = mDir.lengthSqr();
282 const RealT B = 2 * mDir.dot(origin);
283 const RealT C = origin.lengthSqr() - radius * radius;
284 const RealT D = B * B - 4 * A * C;
285
286 if (D < 0) {
287 return false;
288 }
289 const RealT Q = RealT(-0.5) * (B < 0 ? (B + Sqrt(D)) : (B - Sqrt(D)));
290
291 t0 = Q / A;
292 t1 = C / Q;
293
294 if (t0 > t1) {
295 RealT tmp = t0;
296 t0 = t1;
297 t1 = tmp;
298 }
299 if (t0 < mTimeSpan.t0) {
300 t0 = mTimeSpan.t0;
301 }
302 if (t1 > mTimeSpan.t1) {
303 t1 = mTimeSpan.t1;
304 }
305 return t0 <= t1;
306 }
307
308 /// @brief Return true if this ray intersects the specified sphere.
309 ///
310 /// @param center The center of the sphere in the same space as this ray.
311 /// @param radius The radius of the sphere in the same units as this ray.
312 __hostdev__ bool intersects(const Vec3T& center, RealT radius) const
313 {
314 RealT t0, t1;
315 return this->intersects(center, radius, t0, t1) > 0;
316 }
317
318 /// @brief Return true if this ray intersects the specified sphere.
319 ///
320 /// @note For intersection this ray is clipped to the two intersection points.
321 ///
322 /// @param center The center of the sphere in the same space as this ray.
323 /// @param radius The radius of the sphere in the same units as this ray.
324 __hostdev__ bool clip(const Vec3T& center, RealT radius)
325 {
326 RealT t0, t1;
327 const bool hit = this->intersects(center, radius, t0, t1);
328 if (hit) {
329 mTimeSpan.set(t0, t1);
330 }
331 return hit;
332 }
333#if 0
334 /// @brief Return true if the Ray intersects the specified
335 /// axisaligned bounding box.
336 ///
337 /// @param bbox Axis-aligned bounding box in the same space as the Ray.
338 /// @param t0 If an intersection is detected this is assigned
339 /// the time for the first intersection point.
340 /// @param t1 If an intersection is detected this is assigned
341 /// the time for the second intersection point.
342 template<typename BBoxT>
343 __hostdev__ bool intersects(const BBoxT& bbox, RealT& t0, RealT& t1) const
344 {
345 t0 = (bbox[ mSign[0]][0] - mEye[0]) * mInvDir[0];
346 RealT t2 = (bbox[1-mSign[1]][1] - mEye[1]) * mInvDir[1];
347 if (t0 > t2) return false;
348 t1 = (bbox[1-mSign[0]][0] - mEye[0]) * mInvDir[0];
349 RealT t3 = (bbox[ mSign[1]][1] - mEye[1]) * mInvDir[1];
350 if (t3 > t1) return false;
351 if (t3 > t0) t0 = t3;
352 if (t2 < t1) t1 = t2;
353 t3 = (bbox[ mSign[2]][2] - mEye[2]) * mInvDir[2];
354 if (t3 > t1) return false;
355 t2 = (bbox[1-mSign[2]][2] - mEye[2]) * mInvDir[2];
356 if (t0 > t2) return false;
357 if (t3 > t0) t0 = t3;
358 if (mTimeSpan.t1 < t0) return false;
359 if (t2 < t1) t1 = t2;
360 if (mTimeSpan.t0 > t1) return false;
361 if (mTimeSpan.t0 > t0) t0 = mTimeSpan.t0;
362 if (mTimeSpan.t1 < t1) t1 = mTimeSpan.t1;
363 return true;
364 /*
365 mTimeSpan.get(_t0, _t1);
366 double t0 = _t0, t1 = _t1;
367 for (int i = 0; i < 3; ++i) {
368 //if (abs(mDir[i])<1e-3) continue;
369 double a = (double(bbox.min()[i]) - mEye[i]) * mInvDir[i];
370 double b = (double(bbox.max()[i]) - mEye[i]) * mInvDir[i];
371 if (a > b) {
372 double tmp = a;
373 a = b;
374 b = tmp;
375 }
376 if (a > t0) t0 = a;
377 if (b < t1) t1 = b;
378 if (t0 > t1) {
379 //if (gVerbose) printf("Missed BBOX: (%i,%i,%i) -> (%i,%i,%i) t0=%f t1=%f\n",
380 // bbox.min()[0], bbox.min()[1], bbox.min()[2],
381 // bbox.max()[0], bbox.max()[1], bbox.max()[2], t0, t1);
382 return false;
383 }
384 }
385 _t0 = t0; _t1 = t1;
386 return true;
387 */
388 }
389#else
390 /// @brief Returns true if this ray intersects an index bounding box.
391 /// If the return value is true t0 and t1 are set to the intersection
392 /// times along the ray.
393 ///
394 /// @warning Intersection with a CoordBBox internally converts to a floating-point bbox
395 /// which imples that the max is padded with one voxel, i.e. bbox.max += 1! This
396 /// avoids gaps between neighboring CoordBBox'es, say from neighboring tree nodes.
397 __hostdev__ bool intersects(const CoordBBox& bbox, RealT& t0, RealT& t1) const
398 {
399 mTimeSpan.get(t0, t1);
400 for (int i = 0; i < 3; ++i) {
401 RealT a = RealT(bbox.min()[i]), b = RealT(bbox.max()[i] + 1);
402 if (a >= b) { // empty bounding box
403 return false;
404 }
405 a = (a - mEye[i]) * mInvDir[i];
406 b = (b - mEye[i]) * mInvDir[i];
407 if (a > b) {
408 RealT tmp = a;
409 a = b;
410 b = tmp;
411 }
412 if (a > t0) {
413 t0 = a;
414 }
415 if (b < t1) {
416 t1 = b;
417 }
418 if (t0 > t1) {
419 return false;
420 }
421 }
422 return true;
423 }
424 /// @brief Returns true if this ray intersects a floating-point bounding box.
425 /// If the return value is true t0 and t1 are set to the intersection
426 /// times along the ray.
427 template<typename OtherVec3T>
428 __hostdev__ bool intersects(const BBox<OtherVec3T>& bbox, RealT& t0, RealT& t1) const
429 {
430 static_assert(is_floating_point<typename OtherVec3T::ValueType>::value, "Ray::intersects: Expected a floating point coordinate");
431 mTimeSpan.get(t0, t1);
432 for (int i = 0; i < 3; ++i) {
433 RealT a = RealT(bbox.min()[i]), b = RealT(bbox.max()[i]);
434 if (a >= b) { // empty bounding box
435 return false;
436 }
437 a = (a - mEye[i]) * mInvDir[i];
438 b = (b - mEye[i]) * mInvDir[i];
439 if (a > b) {
440 RealT tmp = a;
441 a = b;
442 b = tmp;
443 }
444 if (a > t0) {
445 t0 = a;
446 }
447 if (b < t1) {
448 t1 = b;
449 }
450 if (t0 > t1) {
451 return false;
452 }
453 }
454 return true;
455 }
456#endif
457
458 /// @brief Return true if this ray intersects the specified bounding box.
459 ///
460 /// @param bbox Axis-aligned bounding box in the same space as this ray.
461 ///
462 /// @warning If @a bbox is of the type CoordBBox it is converted to a floating-point
463 /// bounding box, which imples that the max is padded with one voxel, i.e.
464 /// bbox.max += 1! This avoids gaps between neighboring CoordBBox'es, say
465 /// from neighboring tree nodes.
466 template<typename BBoxT>
467 __hostdev__ bool intersects(const BBoxT& bbox) const
468 {
469#if 1
470 RealT t0, t1;
471 return this->intersects(bbox, t0, t1);
472#else
473 //BBox<Vec3T> bbox(Vec3T(_bbox[0][0]-1e-4,_bbox[0][1]-1e-4,_bbox[0][2]-1e-4),
474 // Vec3T(_bbox[1][0]+1e-4,_bbox[1][1]+1e-4,_bbox[1][2]+1e-4));
475 RealT t0 = (bbox[mSign[0]][0] - mEye[0]) * mInvDir[0];
476 RealT t2 = (bbox[1 - mSign[1]][1] - mEye[1]) * mInvDir[1];
477 if (t0 > t2) return false;
478 RealT t1 = (bbox[1 - mSign[0]][0] - mEye[0]) * mInvDir[0];
479 RealT t3 = (bbox[mSign[1]][1] - mEye[1]) * mInvDir[1];
480 if (t3 > t1) return false;
481 if (t3 > t0) t0 = t3;
482 if (t2 < t1) t1 = t2;
483 t3 = (bbox[mSign[2]][2] - mEye[2]) * mInvDir[2];
484 if (t3 > t1) return false;
485 t2 = (bbox[1 - mSign[2]][2] - mEye[2]) * mInvDir[2];
486 if (t0 > t2) return false;
487 //if (t3 > t0) t0 = t3;
488 //if (mTimeSpan.t1 < t0) return false;
489 //if (t2 < t1) t1 = t2;
490 //return mTimeSpan.t0 < t1;
491 return true;
492#endif
493 }
494
495 /// @brief Return true if this ray intersects the specified bounding box.
496 ///
497 /// @param bbox Axis-aligned bounding box in the same space as this ray.
498 ///
499 /// @warning If @a bbox is of the type CoordBBox it is converted to a floating-point
500 /// bounding box, which imples that the max is padded with one voxel, i.e.
501 /// bbox.max += 1! This avoids gaps between neighboring CoordBBox'es, say
502 /// from neighboring tree nodes.
503 ///
504 /// @note For intersection this ray is clipped to the two intersection points.
505 template<typename BBoxT>
506 __hostdev__ bool clip(const BBoxT& bbox)
507 {
508 RealT t0, t1;
509 const bool hit = this->intersects(bbox, t0, t1);
510 if (hit) {
511 mTimeSpan.set(t0, t1);
512 }
513 return hit;
514 }
515
516 /// @brief Return true if the Ray intersects the plane specified
517 /// by a normal and distance from the origin.
518 ///
519 /// @param normal Normal of the plane.
520 /// @param distance Distance of the plane to the origin.
521 /// @param t Time of intersection, if one exists.
522 __hostdev__ bool intersects(const Vec3T& normal, RealT distance, RealT& t) const
523 {
524 const RealT cosAngle = mDir.dot(normal);
525 if (isApproxZero(cosAngle)) {
526 return false; // ray is parallel to plane
527 }
528 t = (distance - mEye.dot(normal)) / cosAngle;
529 return this->test(t);
530 }
531
532 /// @brief Return true if the Ray intersects the plane specified
533 /// by a normal and point.
534 ///
535 /// @param normal Normal of the plane.
536 /// @param point Point in the plane.
537 /// @param t Time of intersection, if one exists.
538 __hostdev__ bool intersects(const Vec3T& normal, const Vec3T& point, RealT& t) const
539 {
540 return this->intersects(normal, point.dot(normal), t);
541 }
542
543 private:
544 Vec3T mEye, mDir, mInvDir;
545 TimeSpan mTimeSpan;
546 int mSign[3];
547}; // end of Ray class
548
549} // namespace nanovdb
550
551#endif // NANOVDB_RAY_HAS_BEEN_INCLUDED
NanoVDB.h
Implements a light-weight self-contained VDB data-structure in a single file! In other words,...
__hostdev__
#define __hostdev__
Definition NanoVDB.h:213
nanovdb::Ray
Definition Ray.h:19
nanovdb::Ray::clip
__hostdev__ bool clip(const Vec3T &center, RealT radius)
Return true if this ray intersects the specified sphere.
Definition Ray.h:324
nanovdb::Ray::Vec3Type
Vec3< RealT > Vec3Type
Definition Ray.h:22
nanovdb::Ray::setEye
__hostdev__ Ray & setEye(const Vec3Type &eye)
Definition Ray.h:83
nanovdb::Ray::intersects
__hostdev__ bool intersects(const Vec3T &center, RealT radius) const
Return true if this ray intersects the specified sphere.
Definition Ray.h:312
nanovdb::Ray::setDir
__hostdev__ Ray & setDir(const Vec3Type &dir)
Definition Ray.h:89
nanovdb::Ray::invDir
__hostdev__ const Vec3T & invDir() const
Definition Ray.h:144
nanovdb::Ray::end
__hostdev__ Vec3T end() const
Return the endpoint of the ray.
Definition Ray.h:168
nanovdb::Ray::intersects
__hostdev__ bool intersects(const BBox< OtherVec3T > &bbox, RealT &t0, RealT &t1) const
Returns true if this ray intersects a floating-point bounding box. If the return value is true t0 and...
Definition Ray.h:428
nanovdb::Ray::test
__hostdev__ bool test(RealT time) const
Return true if time is within t0 and t1, both inclusive.
Definition Ray.h:177
nanovdb::Ray::clip
__hostdev__ bool clip(const BBoxT &bbox)
Return true if this ray intersects the specified bounding box.
Definition Ray.h:506
nanovdb::Ray::sign
__hostdev__ int sign(int i) const
Definition Ray.h:150
nanovdb::Ray::Ray
__hostdev__ Ray(const Vec3Type &eye=Vec3Type(0, 0, 0), const Vec3Type &direction=Vec3Type(1, 0, 0), RealT t0=Delta< RealT >::value(), RealT t1=Maximum< RealT >::value())
Definition Ray.h:63
nanovdb::Ray::RealType
RealT RealType
Definition Ray.h:21
nanovdb::Ray::intersects
__hostdev__ bool intersects(const Vec3T &normal, RealT distance, RealT &t) const
Return true if the Ray intersects the plane specified by a normal and distance from the origin.
Definition Ray.h:522
nanovdb::Ray::setMinTime
__hostdev__ Ray & setMinTime(RealT t0)
Definition Ray.h:101
nanovdb::Ray::eye
__hostdev__ const Vec3T & eye() const
Definition Ray.h:140
nanovdb::Ray::applyInverseMap
__hostdev__ Ray applyInverseMap(const MapType &map) const
Return a new Ray that is transformed with the inverse of the specified map.
Definition Ray.h:223
nanovdb::Ray::Vec3T
Vec3Type Vec3T
Definition Ray.h:23
nanovdb::Ray::reset
__hostdev__ Ray & reset(const Vec3Type &eye, const Vec3Type &direction, RealT t0=Delta< RealT >::value(), RealT t1=Maximum< RealT >::value())
Definition Ray.h:128
nanovdb::Ray::offsetEye
__hostdev__ Ray & offsetEye(RealT offset)
Definition Ray.h:75
nanovdb::Ray::applyMap
__hostdev__ Ray applyMap(const MapType &map) const
Return a new Ray that is transformed with the specified map.
Definition Ray.h:189
nanovdb::Ray::setMaxTime
__hostdev__ Ray & setMaxTime(RealT t1)
Definition Ray.h:107
nanovdb::Ray::intersects
__hostdev__ bool intersects(const Vec3T &normal, const Vec3T &point, RealT &t) const
Return true if the Ray intersects the plane specified by a normal and point.
Definition Ray.h:538
nanovdb::Ray::dir
__hostdev__ const Vec3T & dir() const
Definition Ray.h:142
nanovdb::Ray::setTimes
__hostdev__ Ray & setTimes(RealT t0=Delta< RealT >::value(), RealT t1=Maximum< RealT >::value())
Definition Ray.h:113
nanovdb::Ray::t1
__hostdev__ RealT t1() const
Definition Ray.h:148
nanovdb::Ray::intersects
__hostdev__ bool intersects(const Vec3T &center, RealT radius, RealT &t0, RealT &t1) const
Return true if this ray intersects the specified sphere.
Definition Ray.h:278
nanovdb::Ray::applyInverseMapF
__hostdev__ Ray applyInverseMapF(const MapType &map) const
Definition Ray.h:231
nanovdb::Ray::valid
__hostdev__ bool valid(RealT eps=Delta< float >::value()) const
Return true if t1 is larger than t0 by at least eps.
Definition Ray.h:174
nanovdb::Ray::indexToWorldF
__hostdev__ Ray indexToWorldF(const GridType &grid) const
Return a new ray in world space, assuming the existing ray is represented in the index space of the s...
Definition Ray.h:242
nanovdb::Ray::t0
__hostdev__ RealT t0() const
Definition Ray.h:146
nanovdb::Ray::applyMapF
__hostdev__ Ray applyMapF(const MapType &map) const
Definition Ray.h:201
nanovdb::Ray::intersects
__hostdev__ bool intersects(const BBoxT &bbox) const
Return true if this ray intersects the specified bounding box.
Definition Ray.h:467
nanovdb::Ray::start
__hostdev__ Vec3T start() const
Return the starting point of the ray.
Definition Ray.h:165
nanovdb::Ray::intersects
__hostdev__ bool intersects(const CoordBBox &bbox, RealT &t0, RealT &t1) const
Returns true if this ray intersects an index bounding box. If the return value is true t0 and t1 are ...
Definition Ray.h:397
nanovdb::Ray::scaleTimes
__hostdev__ Ray & scaleTimes(RealT scale)
Definition Ray.h:122
nanovdb::Ray::operator()
__hostdev__ Vec3T operator()(RealT time) const
Return the position along the ray at the specified time.
Definition Ray.h:153
nanovdb::Ray::mid
__hostdev__ Vec3T mid() const
Return the midpoint of the ray.
Definition Ray.h:171
nanovdb::Ray::worldToIndexF
__hostdev__ Ray worldToIndexF(const GridType &grid) const
Return a new ray in index space, assuming the existing ray is represented in the world space of the s...
Definition Ray.h:257
nanovdb::Vec3
A simple vector class with three components, similar to openvdb::math::Vec3.
Definition NanoVDB.h:1530
nanovdb::Vec3::length
T length() const
Definition NanoVDB.h:1587
nanovdb::Vec3::dot
T dot(const Vec3T &v) const
Definition NanoVDB.h:1575
nanovdb::Vec3::lengthSqr
T lengthSqr() const
Definition NanoVDB.h:1583
nanovdb
Convert a base-pointer to an openvdb grid, denoted srcGrid, to a nanovdb grid of the same type,...
Definition NanoVDB.h:247
nanovdb::isApproxZero
bool isApproxZero(const Type &x)
Definition NanoVDB.h:1083
nanovdb::GridType
GridType
List of types that are currently supported by NanoVDB.
Definition NanoVDB.h:317
nanovdb::Sqrt
float Sqrt(float x)
Return the square root of a floating-point value.
Definition NanoVDB.h:1233
nanovdb::BBox< Coord >
nanovdb::Delta
Delta for small floating-point offsets.
Definition NanoVDB.h:1035
nanovdb::Maximum
Maximum floating-point values.
Definition NanoVDB.h:1076
nanovdb::Ray::TimeSpan
Definition Ray.h:26
nanovdb::Ray::TimeSpan::set
__hostdev__ void set(RealT _t0, RealT _t1)
Set both times.
Definition Ray.h:37
nanovdb::Ray::TimeSpan::test
__hostdev__ bool test(RealT t) const
Return true if time is inclusive.
Definition Ray.h:60
nanovdb::Ray::TimeSpan::valid
__hostdev__ bool valid(RealT eps=Delta< RealT >::value()) const
Return true if t1 is larger than t0 by at least eps.
Definition Ray.h:49
nanovdb::Ray::TimeSpan::TimeSpan
__hostdev__ TimeSpan()
Default constructor.
Definition Ray.h:29
nanovdb::Ray::TimeSpan::mid
__hostdev__ RealT mid() const
Return the midpoint of the ray.
Definition Ray.h:51
nanovdb::Ray::TimeSpan::t1
RealT t1
Definition Ray.h:27
nanovdb::Ray::TimeSpan::TimeSpan
__hostdev__ TimeSpan(RealT _t0, RealT _t1)
Constructor.
Definition Ray.h:31
nanovdb::Ray::TimeSpan::t0
RealT t0
Definition Ray.h:27
nanovdb::Ray::TimeSpan::get
__hostdev__ void get(RealT &_t0, RealT &_t1) const
Get both times.
Definition Ray.h:43
nanovdb::Ray::TimeSpan::scale
__hostdev__ void scale(RealT s)
Multiplies both times.
Definition Ray.h:53
nanovdb::is_floating_point
C++11 implementation of std::is_floating_point.
Definition NanoVDB.h:463