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GridTransformer.h
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1 //
3 // Copyright (c) 2012-2015 DreamWorks Animation LLC
4 //
5 // All rights reserved. This software is distributed under the
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30 //
33
34 #ifndef OPENVDB_TOOLS_GRIDTRANSFORMER_HAS_BEEN_INCLUDED
35 #define OPENVDB_TOOLS_GRIDTRANSFORMER_HAS_BEEN_INCLUDED
36
37 #include <cmath>
38 #include <boost/bind.hpp>
39 #include <boost/function.hpp>
40 #include <boost/shared_ptr.hpp>
41 #include <tbb/blocked_range.h>
42 #include <tbb/parallel_reduce.h>
43 #include <openvdb/Grid.h>
44 #include <openvdb/Types.h>
45 #include <openvdb/math/Math.h> // for isApproxEqual()
46 #include <openvdb/util/NullInterrupter.h>
47 #include "ChangeBackground.h"
48 #include "Interpolation.h"
49 #include "LevelSetRebuild.h" // for doLevelSetRebuild()
50 #include "SignedFloodFill.h" // for signedFloodFill
51 #include "Prune.h" // for pruneLevelSet
52
53 namespace openvdb {
54 OPENVDB_USE_VERSION_NAMESPACE
55 namespace OPENVDB_VERSION_NAME {
56 namespace tools {
57
81 template<typename Sampler, typename Interrupter, typename GridType>
82 inline void
83 resampleToMatch(const GridType& inGrid, GridType& outGrid, Interrupter& interrupter);
84
106 template<typename Sampler, typename GridType>
107 inline void
108 resampleToMatch(const GridType& inGrid, GridType& outGrid);
109
110
112
113
114 namespace internal {
115
119 template<typename Sampler, typename TreeT>
120 class TileSampler: public Sampler
121 {
122 public:
123 typedef typename TreeT::ValueType ValueT;
124
128 TileSampler(const CoordBBox& b, const ValueT& tileVal, bool on):
129 mBBox(b.min().asVec3d(), b.max().asVec3d()), mVal(tileVal), mActive(on), mEmpty(false)
130 {
131 mBBox.expand(-this->radius()); // shrink the bounding box by the sample radius
132 mEmpty = mBBox.empty();
133 }
134
135 bool sample(const TreeT& inTree, const Vec3R& inCoord, ValueT& result) const
136 {
137 if (!mEmpty && mBBox.isInside(inCoord)) { result = mVal; return mActive; }
138 return Sampler::sample(inTree, inCoord, result);
139 }
140
141 protected:
142 BBoxd mBBox;
143 ValueT mVal;
144 bool mActive, mEmpty;
145 };
146
147
150 template<typename TreeT>
151 class TileSampler<PointSampler, TreeT>: public PointSampler {
152 public:
153 TileSampler(const CoordBBox&, const typename TreeT::ValueType&, bool) {}
154 };
155
158 template<typename TreeT>
159 class TileSampler<StaggeredPointSampler, TreeT>: public StaggeredPointSampler {
160 public:
161 TileSampler(const CoordBBox&, const typename TreeT::ValueType&, bool) {}
162 };
163
164 } // namespace internal
165
166
168
169
187 class GridResampler
188 {
189 public:
190 typedef boost::shared_ptr<GridResampler> Ptr;
191 typedef boost::function<bool (void)> InterruptFunc;
192
193 GridResampler(): mThreaded(true), mTransformTiles(true) {}
194 virtual ~GridResampler() {}
195
197 void setThreaded(bool b) { mThreaded = b; }
199 bool threaded() const { return mThreaded; }
201 void setTransformTiles(bool b) { mTransformTiles = b; }
203 bool transformTiles() const { return mTransformTiles; }
204
208 template<typename InterrupterType> void setInterrupter(InterrupterType&);
209
210 template<typename Sampler, typename GridT, typename Transformer>
211 void transformGrid(const Transformer&,
212 const GridT& inGrid, GridT& outGrid) const;
213
214 protected:
215 template<typename Sampler, typename GridT, typename Transformer>
216 void applyTransform(const Transformer&, const GridT& inGrid, GridT& outGrid) const;
217
218 bool interrupt() const { return mInterrupt && mInterrupt(); }
219
220 private:
221 template<typename Sampler, typename InTreeT, typename OutTreeT, typename Transformer>
222 static void transformBBox(const Transformer&, const CoordBBox& inBBox,
223 const InTreeT& inTree, OutTreeT& outTree, const InterruptFunc&,
224 const Sampler& = Sampler());
225
226 template<typename Sampler, typename TreeT, typename Transformer>
227 class RangeProcessor;
228
229 bool mThreaded, mTransformTiles;
230 InterruptFunc mInterrupt;
231 };
232
233
235
236
255 class GridTransformer: public GridResampler
256 {
257 public:
258 typedef boost::shared_ptr<GridTransformer> Ptr;
259
260 GridTransformer(const Mat4R& xform);
261 GridTransformer(
262 const Vec3R& pivot,
263 const Vec3R& scale,
264 const Vec3R& rotate,
265 const Vec3R& translate,
266 const std::string& xformOrder = "tsr",
267 const std::string& rotationOrder = "zyx");
268 virtual ~GridTransformer() {}
269
270 const Mat4R& getTransform() const { return mTransform; }
271
272 template<class Sampler, class GridT>
273 void transformGrid(const GridT& inGrid, GridT& outGrid) const;
274
275 private:
276 struct MatrixTransform;
277
278 inline void init(const Vec3R& pivot, const Vec3R& scale,
279 const Vec3R& rotate, const Vec3R& translate,
280 const std::string& xformOrder, const std::string& rotOrder);
281
282 Vec3R mPivot;
283 Vec3i mMipLevels;
284 Mat4R mTransform, mPreScaleTransform, mPostScaleTransform;
285 };
286
287
289
290
291 namespace local_util {
292
296 template<typename T>
297 inline bool
298 decompose(const math::Mat4<T>& m, math::Vec3<T>& scale,
299 math::Vec3<T>& rotate, math::Vec3<T>& translate)
300 {
301 if (!math::isAffine(m)) return false;
302
303 // this is the translation in world space
304 translate = m.getTranslation();
305 // Extract translation.
306 math::Mat3<T> temp = m.getMat3();
307
308 scale.init(
309 (math::Vec3<T>(1, 0, 0) * temp).length(),
310 (math::Vec3<T>(0, 1, 0) * temp).length(),
311 (math::Vec3<T>(0, 0, 1) * temp).length());
312 // Extract scale.
313 temp *= math::scale<math::Mat3<T> >(scale).inverse();
314
315 rotate = math::eulerAngles(temp, math::XYZ_ROTATION);
316
317 if (!rotate.eq(math::Vec3<T>::zero()) && !scale.eq(math::Vec3<T>(scale[0]))) {
318 // No unique decomposition if scale is nonuniform and rotation is nonzero.
319 return false;
320 }
321 return true;
322 }
323
324 } // namespace local_util
325
326
328
329
333 struct GridTransformer::MatrixTransform
334 {
335 MatrixTransform(): mat(Mat4R::identity()), invMat(Mat4R::identity()) {}
336 MatrixTransform(const Mat4R& xform): mat(xform), invMat(xform.inverse()) {}
337
338 bool isAffine() const { return math::isAffine(mat); }
339
340 Vec3R transform(const Vec3R& pos) const { return mat.transformH(pos); }
341
342 Vec3R invTransform(const Vec3R& pos) const { return invMat.transformH(pos); }
343
344 Mat4R mat, invMat;
345 };
346
347
349
350
355 class ABTransform
356 {
357 public:
360 ABTransform(const math::Transform& aXform, const math::Transform& bXform):
361 mAXform(aXform),
362 mBXform(bXform),
363 mIsAffine(mAXform.isLinear() && mBXform.isLinear()),
364 mIsIdentity(mIsAffine && mAXform == mBXform)
365 {}
366
367 bool isAffine() const { return mIsAffine; }
368
369 bool isIdentity() const { return mIsIdentity; }
370
371 openvdb::Vec3R transform(const openvdb::Vec3R& pos) const
372 {
373 return mBXform.worldToIndex(mAXform.indexToWorld(pos));
374 }
375
376 openvdb::Vec3R invTransform(const openvdb::Vec3R& pos) const
377 {
378 return mAXform.worldToIndex(mBXform.indexToWorld(pos));
379 }
380
381 const math::Transform& getA() const { return mAXform; }
382 const math::Transform& getB() const { return mBXform; }
383
384 private:
385 const math::Transform &mAXform, &mBXform;
386 const bool mIsAffine;
387 const bool mIsIdentity;
388 };
389
390
397 template<typename Sampler, typename Interrupter, typename GridType>
398 inline void
399 doResampleToMatch(const GridType& inGrid, GridType& outGrid, Interrupter& interrupter)
400 {
401 ABTransform xform(inGrid.transform(), outGrid.transform());
402
403 if (Sampler::consistent() && xform.isIdentity()) {
404 // If the transforms of the input and output are identical, the
405 // output tree is simply a deep copy of the input tree.
406 outGrid.setTree(inGrid.tree().copy());
407 } else if (xform.isAffine()) {
408 // If the input and output transforms are both affine, create an
409 // input to output transform (in:index-to-world * out:world-to-index)
410 // and use the fast GridTransformer API.
411 Mat4R mat = xform.getA().baseMap()->getAffineMap()->getMat4() *
412 ( xform.getB().baseMap()->getAffineMap()->getMat4().inverse() );
413
414 GridTransformer transformer(mat);
415 transformer.setInterrupter(interrupter);
416
417 // Transform the input grid and store the result in the output grid.
418 transformer.transformGrid<Sampler>(inGrid, outGrid);
419 } else {
420 // If either the input or the output transform is non-affine,
421 // use the slower GridResampler API.
422 GridResampler resampler;
423 resampler.setInterrupter(interrupter);
424
425 resampler.transformGrid<Sampler>(xform, inGrid, outGrid);
426 }
427 }
428
429
430 template<typename Sampler, typename Interrupter, typename GridType>
431 inline void
432 resampleToMatch(const GridType& inGrid, GridType& outGrid, Interrupter& interrupter)
433 {
434 if (inGrid.getGridClass() == GRID_LEVEL_SET) {
435 // If the input grid is a level set, resample it using the level set rebuild tool.
436
437 if (inGrid.constTransform() == outGrid.constTransform()) {
438 // If the transforms of the input and output grids are identical,
439 // the output tree is simply a deep copy of the input tree.
440 outGrid.setTree(inGrid.tree().copy());
441 return;
442 }
443
444 // If the output grid is a level set, resample the input grid to have the output grid's
445 // background value. Otherwise, preserve the input grid's background value.
446 typedef typename GridType::ValueType ValueT;
447 const ValueT halfWidth = ((outGrid.getGridClass() == openvdb::GRID_LEVEL_SET)
448 ? ValueT(outGrid.background() * (1.0 / outGrid.voxelSize()[0]))
449 : ValueT(inGrid.background() * (1.0 / inGrid.voxelSize()[0])));
450
451 typename GridType::Ptr tempGrid;
452 try {
453 tempGrid = doLevelSetRebuild(inGrid, /*iso=*/zeroVal<ValueT>(),
454 /*exWidth=*/halfWidth, /*inWidth=*/halfWidth,
455 &outGrid.constTransform(), &interrupter);
456 } catch (TypeError&) {
457 // The input grid is classified as a level set, but it has a value type
458 // that is not supported by the level set rebuild tool. Fall back to
459 // using the generic resampler.
460 tempGrid.reset();
461 }
462 if (tempGrid) {
463 outGrid.setTree(tempGrid->treePtr());
464 return;
465 }
466 }
467
468 // If the input grid is not a level set, use the generic resampler.
469 doResampleToMatch<Sampler>(inGrid, outGrid, interrupter);
470 }
471
472
473 template<typename Sampler, typename GridType>
474 inline void
475 resampleToMatch(const GridType& inGrid, GridType& outGrid)
476 {
477 util::NullInterrupter interrupter;
478 resampleToMatch<Sampler>(inGrid, outGrid, interrupter);
479 }
480
481
483
484
485 inline
486 GridTransformer::GridTransformer(const Mat4R& xform):
487 mPivot(0, 0, 0),
488 mMipLevels(0, 0, 0),
489 mTransform(xform),
490 mPreScaleTransform(Mat4R::identity()),
491 mPostScaleTransform(Mat4R::identity())
492 {
493 Vec3R scale, rotate, translate;
494 if (local_util::decompose(mTransform, scale, rotate, translate)) {
495 // If the transform can be decomposed into affine components,
496 // use them to set up a mipmapping-like scheme for downsampling.
497 init(mPivot, scale, rotate, translate, "srt", "zyx");
498 }
499 }
500
501
502 inline
503 GridTransformer::GridTransformer(
504 const Vec3R& pivot, const Vec3R& scale,
505 const Vec3R& rotate, const Vec3R& translate,
506 const std::string& xformOrder, const std::string& rotOrder):
507 mPivot(0, 0, 0),
508 mMipLevels(0, 0, 0),
509 mPreScaleTransform(Mat4R::identity()),
510 mPostScaleTransform(Mat4R::identity())
511 {
512 init(pivot, scale, rotate, translate, xformOrder, rotOrder);
513 }
514
515
517
518
519 inline void
520 GridTransformer::init(
521 const Vec3R& pivot, const Vec3R& scale,
522 const Vec3R& rotate, const Vec3R& translate,
523 const std::string& xformOrder, const std::string& rotOrder)
524 {
525 if (xformOrder.size() != 3) {
526 OPENVDB_THROW(ValueError, "invalid transform order (" + xformOrder + ")");
527 }
528 if (rotOrder.size() != 3) {
529 OPENVDB_THROW(ValueError, "invalid rotation order (" + rotOrder + ")");
530 }
531
532 mPivot = pivot;
533
534 // Scaling is handled via a mipmapping-like scheme of successive
535 // halvings of the tree resolution, until the remaining scale
536 // factor is greater than or equal to 1/2.
537 Vec3R scaleRemainder = scale;
538 for (int i = 0; i < 3; ++i) {
539 double s = std::fabs(scale(i));
540 if (s < 0.5) {
541 mMipLevels(i) = int(std::floor(-std::log(s)/std::log(2.0)));
542 scaleRemainder(i) = scale(i) * (1 << mMipLevels(i));
543 }
544 }
545
546 // Build pre-scale and post-scale transform matrices based on
547 // the user-specified order of operations.
548 // Note that we iterate over the transform order string in reverse order
549 // (e.g., "t", "r", "s", given "srt"). This is because math::Mat matrices
550 // postmultiply row vectors rather than premultiplying column vectors.
551 mTransform = mPreScaleTransform = mPostScaleTransform = Mat4R::identity();
552 Mat4R* remainder = &mPostScaleTransform;
553 int rpos, spos, tpos;
554 rpos = spos = tpos = 3;
555 for (int ix = 2; ix >= 0; --ix) { // reverse iteration
556 switch (xformOrder[ix]) {
557
558 case 'r':
559 rpos = ix;
560 mTransform.preTranslate(pivot);
561 remainder->preTranslate(pivot);
562
563 int xpos, ypos, zpos;
564 xpos = ypos = zpos = 3;
565 for (int ir = 2; ir >= 0; --ir) {
566 switch (rotOrder[ir]) {
567 case 'x':
568 xpos = ir;
569 mTransform.preRotate(math::X_AXIS, rotate.x());
570 remainder->preRotate(math::X_AXIS, rotate.x());
571 break;
572 case 'y':
573 ypos = ir;
574 mTransform.preRotate(math::Y_AXIS, rotate.y());
575 remainder->preRotate(math::Y_AXIS, rotate.y());
576 break;
577 case 'z':
578 zpos = ir;
579 mTransform.preRotate(math::Z_AXIS, rotate.z());
580 remainder->preRotate(math::Z_AXIS, rotate.z());
581 break;
582 }
583 }
584 // Reject rotation order strings that don't contain exactly one
585 // instance of "x", "y" and "z".
586 if (xpos > 2 || ypos > 2 || zpos > 2) {
587 OPENVDB_THROW(ValueError, "invalid rotation order (" + rotOrder + ")");
588 }
589
590 mTransform.preTranslate(-pivot);
591 remainder->preTranslate(-pivot);
592 break;
593
594 case 's':
595 spos = ix;
596 mTransform.preTranslate(pivot);
597 mTransform.preScale(scale);
598 mTransform.preTranslate(-pivot);
599
600 remainder->preTranslate(pivot);
601 remainder->preScale(scaleRemainder);
602 remainder->preTranslate(-pivot);
603 remainder = &mPreScaleTransform;
604 break;
605
606 case 't':
607 tpos = ix;
608 mTransform.preTranslate(translate);
609 remainder->preTranslate(translate);
610 break;
611 }
612 }
613 // Reject transform order strings that don't contain exactly one
614 // instance of "t", "r" and "s".
615 if (tpos > 2 || rpos > 2 || spos > 2) {
616 OPENVDB_THROW(ValueError, "invalid transform order (" + xformOrder + ")");
617 }
618 }
619
620
622
623
624 template<typename InterrupterType>
625 void
626 GridResampler::setInterrupter(InterrupterType& interrupter)
627 {
628 mInterrupt = boost::bind(&InterrupterType::wasInterrupted,
629 /*this=*/&interrupter, /*percent=*/-1);
630 }
631
632
633 template<typename Sampler, typename GridT, typename Transformer>
634 void
635 GridResampler::transformGrid(const Transformer& xform,
636 const GridT& inGrid, GridT& outGrid) const
637 {
638 tools::changeBackground(outGrid.tree(), inGrid.background());
639 applyTransform<Sampler>(xform, inGrid, outGrid);
640 }
641
642
643 template<class Sampler, class GridT>
644 void
645 GridTransformer::transformGrid(const GridT& inGrid, GridT& outGrid) const
646 {
647 tools::changeBackground(outGrid.tree(), inGrid.background());
648
649 if (!Sampler::mipmap() || mMipLevels == Vec3i::zero()) {
650 // Skip the mipmapping step.
651 const MatrixTransform xform(mTransform);
652 applyTransform<Sampler>(xform, inGrid, outGrid);
653
654 } else {
655 bool firstPass = true;
656 const typename GridT::ValueType background = inGrid.background();
657 typename GridT::Ptr tempGrid = GridT::create(background);
658
659 if (!mPreScaleTransform.eq(Mat4R::identity())) {
660 firstPass = false;
661 // Apply the pre-scale transform to the input grid
662 // and store the result in a temporary grid.
663 const MatrixTransform xform(mPreScaleTransform);
664 applyTransform<Sampler>(xform, inGrid, *tempGrid);
665 }
666
667 // While the scale factor along one or more axes is less than 1/2,
668 // scale the grid by half along those axes.
669 Vec3i count = mMipLevels; // # of halvings remaining per axis
670 while (count != Vec3i::zero()) {
671 MatrixTransform xform;
672 xform.mat.setTranslation(mPivot);
673 xform.mat.preScale(Vec3R(
674 count.x() ? .5 : 1, count.y() ? .5 : 1, count.z() ? .5 : 1));
675 xform.mat.preTranslate(-mPivot);
676 xform.invMat = xform.mat.inverse();
677
678 if (firstPass) {
679 firstPass = false;
680 // Scale the input grid and store the result in a temporary grid.
681 applyTransform<Sampler>(xform, inGrid, *tempGrid);
682 } else {
683 // Scale the temporary grid and store the result in a transient grid,
684 // then swap the two and discard the transient grid.
685 typename GridT::Ptr destGrid = GridT::create(background);
686 applyTransform<Sampler>(xform, *tempGrid, *destGrid);
687 tempGrid.swap(destGrid);
688 }
689 // (3, 2, 1) -> (2, 1, 0) -> (1, 0, 0) -> (0, 0, 0), etc.
690 count = math::maxComponent(count - 1, Vec3i::zero());
691 }
692
693 // Apply the post-scale transform and store the result in the output grid.
694 if (!mPostScaleTransform.eq(Mat4R::identity())) {
695 const MatrixTransform xform(mPostScaleTransform);
696 applyTransform<Sampler>(xform, *tempGrid, outGrid);
697 } else {
698 outGrid.setTree(tempGrid->treePtr());
699 }
700 }
701 }
702
703
705
706
707 template<class Sampler, class TreeT, typename Transformer>
708 class GridResampler::RangeProcessor
709 {
710 public:
711 typedef typename TreeT::LeafCIter LeafIterT;
712 typedef typename TreeT::ValueAllCIter TileIterT;
713 typedef typename tree::IteratorRange<LeafIterT> LeafRange;
714 typedef typename tree::IteratorRange<TileIterT> TileRange;
715 typedef typename tree::ValueAccessor<const TreeT> InTreeAccessor;
716 typedef typename tree::ValueAccessor<TreeT> OutTreeAccessor;
717
718 RangeProcessor(const Transformer& xform, const CoordBBox& b, const TreeT& inT, TreeT& outT):
719 mIsRoot(true), mXform(xform), mBBox(b),
720 mInTree(inT), mOutTree(&outT), mInAcc(mInTree), mOutAcc(*mOutTree)
721 {}
722
723 RangeProcessor(const Transformer& xform, const CoordBBox& b, const TreeT& inTree):
724 mIsRoot(false), mXform(xform), mBBox(b),
725 mInTree(inTree), mOutTree(new TreeT(inTree.background())),
726 mInAcc(mInTree), mOutAcc(*mOutTree)
727 {}
728
729 ~RangeProcessor() { if (!mIsRoot) delete mOutTree; }
730
732 RangeProcessor(RangeProcessor& other, tbb::split):
733 mIsRoot(false),
734 mXform(other.mXform),
735 mBBox(other.mBBox),
736 mInTree(other.mInTree),
737 mOutTree(new TreeT(mInTree.background())),
738 mInAcc(mInTree),
739 mOutAcc(*mOutTree),
740 mInterrupt(other.mInterrupt)
741 {}
742
743 void setInterrupt(const InterruptFunc& f) { mInterrupt = f; }
744
746 void operator()(LeafRange& r)
747 {
748 for ( ; r; ++r) {
749 if (interrupt()) break;
750 LeafIterT i = r.iterator();
751 CoordBBox bbox(i->origin(), i->origin() + Coord(i->dim()));
752 if (!mBBox.empty()) {
753 // Intersect the leaf node's bounding box with mBBox.
754 bbox = CoordBBox(
755 Coord::maxComponent(bbox.min(), mBBox.min()),
756 Coord::minComponent(bbox.max(), mBBox.max()));
757 }
758 if (!bbox.empty()) {
759 transformBBox<Sampler>(mXform, bbox, mInAcc, mOutAcc, mInterrupt);
760 }
761 }
762 }
763
765 void operator()(TileRange& r)
766 {
767 for ( ; r; ++r) {
768 if (interrupt()) break;
769
770 TileIterT i = r.iterator();
771 // Skip voxels and background tiles.
772 if (!i.isTileValue()) continue;
773 if (!i.isValueOn() && math::isApproxEqual(*i, mOutTree->background())) continue;
774
775 CoordBBox bbox;
776 i.getBoundingBox(bbox);
777 if (!mBBox.empty()) {
778 // Intersect the tile's bounding box with mBBox.
779 bbox = CoordBBox(
780 Coord::maxComponent(bbox.min(), mBBox.min()),
781 Coord::minComponent(bbox.max(), mBBox.max()));
782 }
783 if (!bbox.empty()) {
788 internal::TileSampler<Sampler, InTreeAccessor>
789 sampler(bbox, i.getValue(), i.isValueOn());
790 transformBBox(mXform, bbox, mInAcc, mOutAcc, mInterrupt, sampler);
791 }
792 }
793 }
794
796 void join(RangeProcessor& other)
797 {
798 if (!interrupt()) mOutTree->merge(*other.mOutTree);
799 }
800
801 private:
802 bool interrupt() const { return mInterrupt && mInterrupt(); }
803
804 const bool mIsRoot; // true if mOutTree is the top-level tree
805 Transformer mXform;
806 CoordBBox mBBox;
807 const TreeT& mInTree;
808 TreeT* mOutTree;
809 InTreeAccessor mInAcc;
810 OutTreeAccessor mOutAcc;
811 InterruptFunc mInterrupt;
812 };
813
814
816
817
818 template<class Sampler, class GridT, typename Transformer>
819 void
820 GridResampler::applyTransform(const Transformer& xform,
821 const GridT& inGrid, GridT& outGrid) const
822 {
823 typedef typename GridT::TreeType TreeT;
824 const TreeT& inTree = inGrid.tree();
825 TreeT& outTree = outGrid.tree();
826
827 typedef RangeProcessor<Sampler, TreeT, Transformer> RangeProc;
828
829 const GridClass gridClass = inGrid.getGridClass();
830
831 if (gridClass != GRID_LEVEL_SET && mTransformTiles) {
832 // Independently transform the tiles of the input grid.
833 // Note: Tiles in level sets can only be background tiles, and they
834 // are handled more efficiently with a signed flood fill (see below).
835
836 RangeProc proc(xform, CoordBBox(), inTree, outTree);
837 proc.setInterrupt(mInterrupt);
838
839 typename RangeProc::TileIterT tileIter = inTree.cbeginValueAll();
840 tileIter.setMaxDepth(tileIter.getLeafDepth() - 1); // skip leaf nodes
841 typename RangeProc::TileRange tileRange(tileIter);
842
843 if (mThreaded) {
844 tbb::parallel_reduce(tileRange, proc);
845 } else {
846 proc(tileRange);
847 }
848 }
849
850 CoordBBox clipBBox;
851 if (gridClass == GRID_LEVEL_SET) {
852 // Inactive voxels in level sets can only be background voxels, and they
853 // are handled more efficiently with a signed flood fill (see below).
854 clipBBox = inGrid.evalActiveVoxelBoundingBox();
855 }
856
857 // Independently transform the leaf nodes of the input grid.
858
859 RangeProc proc(xform, clipBBox, inTree, outTree);
860 proc.setInterrupt(mInterrupt);
861
862 typename RangeProc::LeafRange leafRange(inTree.cbeginLeaf());
863
864 if (mThreaded) {
865 tbb::parallel_reduce(leafRange, proc);
866 } else {
867 proc(leafRange);
868 }
869
870 // If the grid is a level set, mark inactive voxels as inside or outside.
871 if (gridClass == GRID_LEVEL_SET) {
872 tools::pruneLevelSet(outTree);
873 tools::signedFloodFill(outTree);
874 }
875 }
876
877
879
880
881 //static
882 template<class Sampler, class InTreeT, class OutTreeT, class Transformer>
883 void
884 GridResampler::transformBBox(
885 const Transformer& xform,
886 const CoordBBox& bbox,
887 const InTreeT& inTree,
888 OutTreeT& outTree,
889 const InterruptFunc& interrupt,
890 const Sampler& sampler)
891 {
892 typedef typename OutTreeT::ValueType ValueT;
893
894 // Transform the corners of the input tree's bounding box
895 // and compute the enclosing bounding box in the output tree.
896 Vec3R
897 inRMin(bbox.min().x(), bbox.min().y(), bbox.min().z()),
898 inRMax(bbox.max().x(), bbox.max().y(), bbox.max().z()),
899 outRMin = math::minComponent(xform.transform(inRMin), xform.transform(inRMax)),
900 outRMax = math::maxComponent(xform.transform(inRMin), xform.transform(inRMax));
901 for (int i = 0; i < 8; ++i) {
902 Vec3R corner(
903 i & 1 ? inRMax.x() : inRMin.x(),
904 i & 2 ? inRMax.y() : inRMin.y(),
905 i & 4 ? inRMax.z() : inRMin.z());
906 outRMin = math::minComponent(outRMin, xform.transform(corner));
907 outRMax = math::maxComponent(outRMax, xform.transform(corner));
908 }
909 Vec3i
910 outMin = local_util::floorVec3(outRMin) - Sampler::radius(),
911 outMax = local_util::ceilVec3(outRMax) + Sampler::radius();
912
913 if (!xform.isAffine()) {
914 // If the transform is not affine, back-project each output voxel
915 // into the input tree.
916 Vec3R xyz, inXYZ;
917 Coord outXYZ;
918 int &x = outXYZ.x(), &y = outXYZ.y(), &z = outXYZ.z();
919 for (x = outMin.x(); x <= outMax.x(); ++x) {
920 if (interrupt && interrupt()) break;
921 xyz.x() = x;
922 for (y = outMin.y(); y <= outMax.y(); ++y) {
923 if (interrupt && interrupt()) break;
924 xyz.y() = y;
925 for (z = outMin.z(); z <= outMax.z(); ++z) {
926 xyz.z() = z;
927 inXYZ = xform.invTransform(xyz);
928 ValueT result;
929 if (sampler.sample(inTree, inXYZ, result)) {
930 outTree.setValueOn(outXYZ, result);
931 } else {
932 // Note: Don't overwrite existing active values with inactive values.
933 if (!outTree.isValueOn(outXYZ)) {
934 outTree.setValueOff(outXYZ, result);
935 }
936 }
937 }
938 }
939 }
940 } else { // affine
941 // Compute step sizes in the input tree that correspond to
942 // unit steps in x, y and z in the output tree.
943 const Vec3R
944 translation = xform.invTransform(Vec3R(0, 0, 0)),
945 deltaX = xform.invTransform(Vec3R(1, 0, 0)) - translation,
946 deltaY = xform.invTransform(Vec3R(0, 1, 0)) - translation,
947 deltaZ = xform.invTransform(Vec3R(0, 0, 1)) - translation;
948
949 #if defined(__ICC)
950 const Vec3R dummy = deltaX;
954 #endif
955
956 // Step by whole voxels through the output tree, sampling the
957 // corresponding fractional voxels of the input tree.
958 Vec3R inStartX = xform.invTransform(Vec3R(outMin));
959 Coord outXYZ;
960 int &x = outXYZ.x(), &y = outXYZ.y(), &z = outXYZ.z();
961 for (x = outMin.x(); x <= outMax.x(); ++x, inStartX += deltaX) {
962 if (interrupt && interrupt()) break;
963 Vec3R inStartY = inStartX;
964 for (y = outMin.y(); y <= outMax.y(); ++y, inStartY += deltaY) {
965 if (interrupt && interrupt()) break;
966 Vec3R inXYZ = inStartY;
967 for (z = outMin.z(); z <= outMax.z(); ++z, inXYZ += deltaZ) {
968 ValueT result;
969 if (sampler.sample(inTree, inXYZ, result)) {
970 outTree.setValueOn(outXYZ, result);
971 } else {
972 // Note: Don't overwrite existing active values with inactive values.
973 if (!outTree.isValueOn(outXYZ)) {
974 outTree.setValueOff(outXYZ, result);
975 }
976 }
977 }
978 }
979 }
980 }
981 } // GridResampler::transformBBox()
982
983 } // namespace tools
984 } // namespace OPENVDB_VERSION_NAME
985 } // namespace openvdb
986
987 #endif // OPENVDB_TOOLS_GRIDTRANSFORMER_HAS_BEEN_INCLUDED
988
989 // Copyright (c) 2012-2015 DreamWorks Animation LLC
990 // All rights reserved. This software is distributed under the
991 // Mozilla Public License 2.0 ( http://www.mozilla.org/MPL/2.0/ )
openvdb::v3_1_0::math::Mat3
3x3 matrix class.
Definition: Mat3.h:54
openvdb::v3_1_0::util::wasInterrupted
bool wasInterrupted(T *i, int percent=-1)
Definition: NullInterrupter.h:76
openvdb::v3_1_0::tools::GridTransformer::~GridTransformer
virtual ~GridTransformer()
Definition: GridTransformer.h:268
openvdb::v3_1_0::tools::internal::TileSampler::mVal
ValueT mVal
Definition: GridTransformer.h:143
openvdb::v3_1_0::tools::internal::TileSampler::mBBox
BBoxd mBBox
Definition: GridTransformer.h:142
openvdb::v3_1_0::tools::GridTransformer::MatrixTransform::MatrixTransform
MatrixTransform(const Mat4R &xform)
Definition: GridTransformer.h:336
Types.h
openvdb::v3_1_0::math::Mat4::inverse
Mat4 inverse(T tolerance=0) const
Definition: Mat4.h:490
openvdb::v3_1_0::tree::IteratorRange
Definition: TreeIterator.h:1339
NullInterrupter.h
openvdb::v3_1_0::tools::StaggeredPointSampler
Definition: Interpolation.h:223
Math.h
General-purpose arithmetic and comparison routines, most of which accept arbitrary value types (or at...
openvdb::v3_1_0::tools::GridResampler::setThreaded
void setThreaded(bool b)
Enable or disable threading. (Threading is enabled by default.)
Definition: GridTransformer.h:197
openvdb::v3_1_0::tools::ABTransform
This class implements the Transformer functor interface (specifically, the isAffine(), transform() and invTransform() methods) for a transform that maps an A grid into a B grid&#39;s index space such that, after resampling, A&#39;s index space and transform match B&#39;s index space and transform.
Definition: GridTransformer.h:355
openvdb::v3_1_0::ValueError
Definition: Exceptions.h:88
openvdb::v3_1_0::tools::ABTransform::isAffine
bool isAffine() const
Definition: GridTransformer.h:367
openvdb::v3_1_0::tools::PointSampler
Definition: Interpolation.h:123
openvdb::v3_1_0::math::Z_AXIS
Definition: Math.h:841
openvdb::v3_1_0::tools::GridTransformer::GridTransformer
GridTransformer(const Mat4R &xform)
Definition: GridTransformer.h:486
openvdb::v3_1_0::math::Mat4::getMat3
Mat3< T > getMat3() const
Definition: Mat4.h:302
LevelSetRebuild.h
openvdb::v3_1_0::Vec3R
math::Vec3< Real > Vec3R
Definition: Types.h:76
openvdb::v3_1_0::tools::ABTransform::isIdentity
bool isIdentity() const
Definition: GridTransformer.h:369
openvdb::v3_1_0::tools::GridResampler::~GridResampler
virtual ~GridResampler()
Definition: GridTransformer.h:194
OPENVDB_THROW
#define OPENVDB_THROW(exception, message)
Definition: Exceptions.h:97
openvdb::v3_1_0::tools::GridResampler::InterruptFunc
boost::function< bool(void)> InterruptFunc
Definition: GridTransformer.h:191
ChangeBackground.h
Efficient multi-threaded replacement of the background values in tree.
openvdb::v3_1_0::tools::local_util::floorVec3
Vec3i floorVec3(const Vec3R &v)
Definition: Interpolation.h:610
openvdb::v3_1_0::math::maxComponent
Vec2< T > maxComponent(const Vec2< T > &v1, const Vec2< T > &v2)
Return component-wise maximum of the two vectors.
Definition: Vec2.h:520
openvdb::v3_1_0::math::Vec3::init
const Vec3< T > & init(T x=0, T y=0, T z=0)
Definition: Vec3.h:117
openvdb::v3_1_0::tools::GridResampler::threaded
bool threaded() const
Return true if threading is enabled.
Definition: GridTransformer.h:199
openvdb::v3_1_0::tools::GridTransformer::MatrixTransform::invTransform
Vec3R invTransform(const Vec3R &pos) const
Definition: GridTransformer.h:342
openvdb::v3_1_0::math::Mat4::getTranslation
Vec3< T > getTranslation() const
Return the translation component.
Definition: Mat4.h:314
openvdb::v3_1_0::tools::Sampler::radius
static int radius()
openvdb::v3_1_0::tools::local_util::ceilVec3
Vec3i ceilVec3(const Vec3R &v)
Definition: Interpolation.h:617
openvdb::v3_1_0::math::Vec3::y
T & y()
Definition: Vec3.h:98
openvdb::v3_1_0::tools::Sampler::mipmap
static bool mipmap()
openvdb::v3_1_0::tools::resampleToMatch
void resampleToMatch(const GridType &inGrid, GridType &outGrid)
Resample an input grid into an output grid of the same type such that, after resampling, the input and output grids coincide (apart from sampling artifacts), but the output grid&#39;s transform is unchanged.
Definition: GridTransformer.h:475
openvdb::v3_1_0::tools::GridResampler::setTransformTiles
void setTransformTiles(bool b)
Enable or disable processing of tiles. (Enabled by default, except for level set grids.)
Definition: GridTransformer.h:201
openvdb::v3_1_0::math::isApproxEqual
bool isApproxEqual(const Type &a, const Type &b)
Return true if a is equal to b to within the default floating-point comparison tolerance.
Definition: Math.h:370
openvdb::v3_1_0::tools::GridResampler::setInterrupter
void setInterrupter(InterrupterType &)
Allow processing to be aborted by providing an interrupter object. The interrupter will be queried pe...
Definition: GridTransformer.h:626
openvdb::v3_1_0::tools::changeBackground
void changeBackground(TreeOrLeafManagerT &tree, const typename TreeOrLeafManagerT::ValueType &background, bool threaded=true, size_t grainSize=32)
Replace the background value in all the nodes of a tree.
Definition: ChangeBackground.h:230
openvdb::v3_1_0::math::eulerAngles
Vec3< typename MatType::value_type > eulerAngles(const MatType &mat, RotationOrder rotationOrder, typename MatType::value_type eps=static_cast< typename MatType::value_type >(1.0e-8))
Return the Euler angles composing the given rotation matrix.
Definition: Mat.h:314
openvdb::v3_1_0::tools::GridTransformer::MatrixTransform::transform
Vec3R transform(const Vec3R &pos) const
Definition: GridTransformer.h:340
openvdb::v3_1_0::tools::composite::min
const boost::disable_if_c< VecTraits< T >::IsVec, T >::type & min(const T &a, const T &b)
Definition: Composite.h:105
openvdb::v3_1_0::math::Vec3i
Vec3< int32_t > Vec3i
Definition: Vec3.h:640
openvdb::v3_1_0::math::Mat4::preTranslate
void preTranslate(const Vec3< T0 > &tr)
Left multiples by the specified translation, i.e. Trans * (*this)
Definition: Mat4.h:715
openvdb::v3_1_0::tools::GridResampler::GridResampler
GridResampler()
Definition: GridTransformer.h:193
openvdb::v3_1_0::tools::GridTransformer::MatrixTransform::MatrixTransform
MatrixTransform()
Definition: GridTransformer.h:335
Prune.h
Defined various multi-threaded utility functions for trees.
openvdb::v3_1_0::math::minComponent
Vec2< T > minComponent(const Vec2< T > &v1, const Vec2< T > &v2)
Return component-wise minimum of the two vectors.
Definition: Vec2.h:511
openvdb::v3_1_0::math::Mat4< Real >::identity
static const Mat4< Real > & identity()
Predefined constant for identity matrix.
Definition: Mat4.h:147
openvdb::v3_1_0::GridClass
GridClass
Definition: Types.h:204
openvdb::v3_1_0::tools::GridResampler::transformGrid
void transformGrid(const Transformer &, const GridT &inGrid, GridT &outGrid) const
Definition: GridTransformer.h:635
openvdb::v3_1_0::math::Mat4::setTranslation
void setTranslation(const Vec3< T > &t)
Definition: Mat4.h:319
openvdb::v3_1_0::tools::GridResampler::applyTransform
void applyTransform(const Transformer &, const GridT &inGrid, GridT &outGrid) const
Definition: GridTransformer.h:820
openvdb::v3_1_0::tools::doLevelSetRebuild
boost::enable_if< boost::is_floating_point< typename GridType::ValueType >, typename GridType::Ptr >::type doLevelSetRebuild(const GridType &grid, typename GridType::ValueType iso, typename GridType::ValueType exWidth, typename GridType::ValueType inWidth, const math::Transform *xform, InterruptT *interrupter)
Definition: LevelSetRebuild.h:229
openvdb::v3_1_0::tools::internal::TileSampler::TileSampler
TileSampler(const CoordBBox &b, const ValueT &tileVal, bool on)
Definition: GridTransformer.h:128
OPENVDB_VERSION_NAME
#define OPENVDB_VERSION_NAME
Definition: version.h:43
openvdb::v3_1_0::util::NullInterrupter
Dummy NOOP interrupter class defining interface.
Definition: NullInterrupter.h:52
openvdb::v3_1_0::tools::local_util::decompose
bool decompose(const math::Mat4< T > &m, math::Vec3< T > &scale, math::Vec3< T > &rotate, math::Vec3< T > &translate)
Decompose an affine transform into scale, rotation and translation components.
Definition: GridTransformer.h:298
openvdb::v3_1_0::tools::ABTransform::getA
const math::Transform & getA() const
Definition: GridTransformer.h:381
openvdb::v3_1_0::tools::GridTransformer
A GridTransformer applies a geometric transformation to an input grid using one of several sampling s...
Definition: GridTransformer.h:255
openvdb::v3_1_0::tools::GridTransformer::MatrixTransform
Definition: GridTransformer.h:333
SignedFloodFill.h
Propagates the sign of distance values from the active voxels in the narrow band to the inactive valu...
openvdb::v3_1_0::tools::ABTransform::invTransform
openvdb::Vec3R invTransform(const openvdb::Vec3R &pos) const
Definition: GridTransformer.h:376
openvdb::v3_1_0::math::Vec3< Real >
openvdb::v3_1_0::tools::pruneLevelSet
void pruneLevelSet(TreeT &tree, bool threaded=true, size_t grainSize=1)
Reduce the memory footprint of a tree by replacing nodes whose values are all inactive with inactive ...
Definition: Prune.h:402
openvdb::v3_1_0::tools::ABTransform::ABTransform
ABTransform(const math::Transform &aXform, const math::Transform &bXform)
Definition: GridTransformer.h:360
openvdb
Definition: Exceptions.h:39
openvdb::v3_1_0::tools::GridResampler::interrupt
bool interrupt() const
Definition: GridTransformer.h:218
openvdb::v3_1_0::tools::GridTransformer::MatrixTransform::mat
Mat4R mat
Definition: GridTransformer.h:344
openvdb::v3_1_0::tools::ABTransform::transform
openvdb::Vec3R transform(const openvdb::Vec3R &pos) const
Definition: GridTransformer.h:371
openvdb::v3_1_0::math::Y_AXIS
Definition: Math.h:840
openvdb::v3_1_0::tools::doResampleToMatch
void doResampleToMatch(const GridType &inGrid, GridType &outGrid, Interrupter &interrupter)
Definition: GridTransformer.h:399
openvdb::v3_1_0::math::Vec3::z
T & z()
Definition: Vec3.h:99
openvdb::v3_1_0::GRID_LEVEL_SET
Definition: Types.h:206
openvdb::v3_1_0::math::isAffine
bool isAffine(const Mat4< T > &m)
Definition: Mat4.h:1336
openvdb::v3_1_0::tools::internal::TileSampler::sample
bool sample(const TreeT &inTree, const Vec3R &inCoord, ValueT &result) const
Definition: GridTransformer.h:135
openvdb::v3_1_0::math::BBox< Vec3d >
openvdb::v3_1_0::tools::internal::TileSampler::ValueT
TreeT::ValueType ValueT
Definition: GridTransformer.h:123
openvdb::v3_1_0::tools::internal::TileSampler< PointSampler, TreeT >::TileSampler
TileSampler(const CoordBBox &, const typename TreeT::ValueType &, bool)
Definition: GridTransformer.h:153
openvdb::v3_1_0::tools::GridTransformer::MatrixTransform::invMat
Mat4R invMat
Definition: GridTransformer.h:344
openvdb::v3_1_0::tools::signedFloodFill
void signedFloodFill(TreeOrLeafManagerT &tree, bool threaded=true, size_t grainSize=1)
Set the values of all inactive voxels and tiles of a narrow-band level set from the signs of the acti...
Definition: SignedFloodFill.h:280
openvdb::v3_1_0::math::Transform
Calculate an axis-aligned bounding box in index space from a bounding sphere in world space...
Definition: Transform.h:66
Interpolation.h
openvdb::v3_1_0::tools::composite::max
const boost::disable_if_c< VecTraits< T >::IsVec, T >::type & max(const T &a, const T &b)
Definition: Composite.h:109
openvdb::v3_1_0::tree::ValueAccessor< const TreeT >
openvdb::v3_1_0::tools::internal::TileSampler::mEmpty
bool mEmpty
Definition: GridTransformer.h:144
Grid.h
openvdb::v3_1_0::tools::internal::TileSampler
A TileSampler wraps a grid sampler of another type (BoxSampler, QuadraticSampler, etc...
Definition: GridTransformer.h:120
openvdb::v3_1_0::math::Mat4< Real >
openvdb::v3_1_0::tools::internal::TileSampler< StaggeredPointSampler, TreeT >::TileSampler
TileSampler(const CoordBBox &, const typename TreeT::ValueType &, bool)
Definition: GridTransformer.h:161
openvdb::v3_1_0::tools::GridResampler
Definition: GridTransformer.h:187
openvdb::v3_1_0::math::Vec3::eq
bool eq(const Vec3< T > &v, T eps=static_cast< T >(1.0e-7)) const
Test if "this" vector is equivalent to vector v with tolerance of eps.
Definition: Vec3.h:145
openvdb::v3_1_0::tools::GridTransformer::transformGrid
void transformGrid(const GridT &inGrid, GridT &outGrid) const
Definition: GridTransformer.h:645
OPENVDB_USE_VERSION_NAMESPACE
#define OPENVDB_USE_VERSION_NAMESPACE
Definition: version.h:71
openvdb::v3_1_0::math::Mat4::preScale
void preScale(const Vec3< T0 > &v)
Definition: Mat4.h:748
openvdb::v3_1_0::tools::GridTransformer::MatrixTransform::isAffine
bool isAffine() const
Definition: GridTransformer.h:338
openvdb::v3_1_0::tools::Sampler
Provises a unified interface for sampling, i.e. interpolation.
Definition: Interpolation.h:90
openvdb::v3_1_0::math::scale
MatType scale(const Vec3< typename MatType::value_type > &s)
Return a matrix that scales by s.
Definition: Mat.h:594
openvdb::v3_1_0::TypeError
Definition: Exceptions.h:87
openvdb::v3_1_0::tools::GridTransformer::Ptr
boost::shared_ptr< GridTransformer > Ptr
Definition: GridTransformer.h:258
openvdb::v3_1_0::tools::Sampler::sample
static bool sample(const TreeT &inTree, const Vec3R &inCoord, typename TreeT::ValueType &result)
Sample inTree at the floating-point index coordinate inCoord and store the result in result...
openvdb::v3_1_0::math::XYZ_ROTATION
Definition: Math.h:846
openvdb::v3_1_0::math::X_AXIS
Definition: Math.h:839
openvdb::v3_1_0::tools::ABTransform::getB
const math::Transform & getB() const
Definition: GridTransformer.h:382
openvdb::v3_1_0::tools::GridTransformer::getTransform
const Mat4R & getTransform() const
Definition: GridTransformer.h:270
openvdb::v3_1_0::math::Mat4::preRotate
void preRotate(Axis axis, T angle)
Left multiplies by a rotation clock-wiseabout the given axis into this matrix.
Definition: Mat4.h:810
openvdb::v3_1_0::tools::GridResampler::Ptr
boost::shared_ptr< GridResampler > Ptr
Definition: GridTransformer.h:190
openvdb::v3_1_0::tools::GridResampler::transformTiles
bool transformTiles() const
Return true if tile processing is enabled.
Definition: GridTransformer.h:203
openvdb::v3_1_0::math::Vec3::x
T & x()
Reference to the component, e.g. v.x() = 4.5f;.
Definition: Vec3.h:97
openvdb::v3_1_0::math::Mat4::eq
bool eq(const Mat4 &m, T eps=1.0e-8) const
Test if "this" is equivalent to m with tolerance of eps value.
Definition: Mat4.h:338