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Clip.h
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// Copyright Contributors to the OpenVDB Project
// SPDX-License-Identifier: MPL-2.0
/// @file Clip.h
///
/// @brief Functions to clip a grid against a bounding box, a camera frustum,
/// or another grid's active voxel topology
#ifndef OPENVDB_TOOLS_CLIP_HAS_BEEN_INCLUDED
#define OPENVDB_TOOLS_CLIP_HAS_BEEN_INCLUDED
#include <openvdb/Grid.h>
#include <openvdb/math/Math.h> // for math::isNegative()
#include <openvdb/math/Maps.h> // for math::NonlinearFrustumMap
#include <openvdb/tree/LeafManager.h>
#include <openvdb/points/PointDataGrid.h>
#include "GridTransformer.h" // for tools::resampleToMatch()
#include "Prune.h"
#include <tbb/blocked_range.h>
#include <tbb/parallel_reduce.h>
#include <type_traits> // for std::enable_if, std::is_same
#include <vector>
namespace openvdb {
OPENVDB_USE_VERSION_NAMESPACE
namespace OPENVDB_VERSION_NAME {
namespace tools {
/// @brief Clip the given grid against a world-space bounding box
/// and return a new grid containing the result.
/// @param grid the grid to be clipped
/// @param bbox a world-space bounding box
/// @param keepInterior if true, discard voxels that lie outside the bounding box;
/// if false, discard voxels that lie inside the bounding box
/// @warning Clipping a level set will likely produce a grid that is
/// no longer a valid level set.
template<typename GridType>
typename GridType::Ptr
clip(const GridType& grid, const BBoxd& bbox, bool keepInterior = true);
/// @brief Clip the given grid against a frustum and return a new grid containing the result.
/// @param grid the grid to be clipped
/// @param frustum a frustum map
/// @param keepInterior if true, discard voxels that lie outside the frustum;
/// if false, discard voxels that lie inside the frustum
/// @warning Clipping a level set will likely produce a grid that is
/// no longer a valid level set.
template<typename GridType>
typename GridType::Ptr
clip(const GridType& grid, const math::NonlinearFrustumMap& frustum, bool keepInterior = true);
/// @brief Clip a grid against the active voxels of another grid
/// and return a new grid containing the result.
/// @param grid the grid to be clipped
/// @param mask a grid whose active voxels form a boolean clipping mask
/// @param keepInterior if true, discard voxels that do not intersect the mask;
/// if false, discard voxels that intersect the mask
/// @details The mask grid need not have the same transform as the source grid.
/// Also, if the mask grid is a level set, consider using tools::sdfInteriorMask
/// to construct a new mask comprising the interior (rather than the narrow band)
/// of the level set.
/// @warning Clipping a level set will likely produce a grid that is
/// no longer a valid level set.
template<typename GridType, typename MaskTreeType>
typename GridType::Ptr
clip(const GridType& grid, const Grid<MaskTreeType>& mask, bool keepInterior = true);
////////////////////////////////////////
/// @cond OPENVDB_DOCS_INTERNAL
namespace clip_internal {
// Use either MaskGrids or BoolGrids internally.
// (MaskGrids have a somewhat lower memory footprint.)
using MaskValueType = ValueMask;
//using MaskValueType = bool;
template<typename TreeT>
class MaskInteriorVoxels
{
public:
using ValueT = typename TreeT::ValueType;
using LeafNodeT = typename TreeT::LeafNodeType;
MaskInteriorVoxels(const TreeT& tree): mAcc(tree) {}
template<typename LeafNodeType>
void operator()(LeafNodeType& leaf, size_t /*leafIndex*/) const
{
const auto* refLeaf = mAcc.probeConstLeaf(leaf.origin());
if (refLeaf) {
for (auto iter = leaf.beginValueOff(); iter; ++iter) {
const auto pos = iter.pos();
leaf.setActiveState(pos, math::isNegative(refLeaf->getValue(pos)));
}
}
}
private:
tree::ValueAccessor<const TreeT> mAcc;
};
////////////////////////////////////////
template<typename TreeT>
class CopyLeafNodes
{
public:
using MaskTreeT = typename TreeT::template ValueConverter<MaskValueType>::Type;
using MaskLeafManagerT = tree::LeafManager<const MaskTreeT>;
CopyLeafNodes(const TreeT&, const MaskLeafManagerT&);
void run(bool threaded = true);
typename TreeT::Ptr tree() const { return mNewTree; }
CopyLeafNodes(CopyLeafNodes&, tbb::split);
void operator()(const tbb::blocked_range<size_t>&);
void join(const CopyLeafNodes& rhs) { mNewTree->merge(*rhs.mNewTree); }
private:
const MaskTreeT* mClipMask;
const TreeT* mTree;
const MaskLeafManagerT* mLeafNodes;
typename TreeT::Ptr mNewTree;
};
template<typename TreeT>
CopyLeafNodes<TreeT>::CopyLeafNodes(const TreeT& tree, const MaskLeafManagerT& leafNodes)
: mTree(&tree)
, mLeafNodes(&leafNodes)
, mNewTree(new TreeT(mTree->background()))
{
}
template<typename TreeT>
CopyLeafNodes<TreeT>::CopyLeafNodes(CopyLeafNodes& rhs, tbb::split)
: mTree(rhs.mTree)
, mLeafNodes(rhs.mLeafNodes)
, mNewTree(new TreeT(mTree->background()))
{
}
template<typename TreeT>
void
CopyLeafNodes<TreeT>::run(bool threaded)
{
if (threaded) tbb::parallel_reduce(mLeafNodes->getRange(), *this);
else (*this)(mLeafNodes->getRange());
}
template<typename TreeT>
void
CopyLeafNodes<TreeT>::operator()(const tbb::blocked_range<size_t>& range)
{
tree::ValueAccessor<TreeT> acc(*mNewTree);
tree::ValueAccessor<const TreeT> refAcc(*mTree);
for (auto n = range.begin(); n != range.end(); ++n) {
const auto& maskLeaf = mLeafNodes->leaf(n);
const auto& ijk = maskLeaf.origin();
const auto* refLeaf = refAcc.probeConstLeaf(ijk);
auto* newLeaf = acc.touchLeaf(ijk);
if (refLeaf) {
for (auto it = maskLeaf.cbeginValueOn(); it; ++it) {
const auto pos = it.pos();
newLeaf->setValueOnly(pos, refLeaf->getValue(pos));
newLeaf->setActiveState(pos, refLeaf->isValueOn(pos));
}
} else {
typename TreeT::ValueType value;
bool isActive = refAcc.probeValue(ijk, value);
for (auto it = maskLeaf.cbeginValueOn(); it; ++it) {
const auto pos = it.pos();
newLeaf->setValueOnly(pos, value);
newLeaf->setActiveState(pos, isActive);
}
}
}
}
////////////////////////////////////////
struct BoolSampler
{
static const char* name() { return "bin"; }
static int radius() { return 2; }
static bool mipmap() { return false; }
static bool consistent() { return true; }
template<class TreeT>
static bool sample(const TreeT& inTree,
const Vec3R& inCoord, typename TreeT::ValueType& result)
{
return inTree.probeValue(Coord::floor(inCoord), result);
}
};
////////////////////////////////////////
// Convert a grid of one type to a grid of another type
template<typename FromGridT, typename ToGridT>
struct ConvertGrid
{
using FromGridCPtrT = typename FromGridT::ConstPtr;
using ToGridPtrT = typename ToGridT::Ptr;
ToGridPtrT operator()(const FromGridCPtrT& grid) { return ToGridPtrT(new ToGridT(*grid)); }
};
// Partial specialization that avoids copying when
// the input and output grid types are the same
template<typename GridT>
struct ConvertGrid<GridT, GridT>
{
using GridCPtrT = typename GridT::ConstPtr;
GridCPtrT operator()(const GridCPtrT& grid) { return grid; }
};
////////////////////////////////////////
// Convert a grid of arbitrary type to a mask grid with the same tree configuration
// and return a pointer to the new grid.
/// @private
template<typename GridT>
typename std::enable_if<!std::is_same<MaskValueType, typename GridT::BuildType>::value,
typename GridT::template ValueConverter<MaskValueType>::Type::Ptr>::type
convertToMaskGrid(const GridT& grid)
{
using MaskGridT = typename GridT::template ValueConverter<MaskValueType>::Type;
auto mask = MaskGridT::create(/*background=*/false);
mask->topologyUnion(grid);
mask->setTransform(grid.constTransform().copy());
return mask;
}
// Overload that avoids any processing if the input grid is already a mask grid
/// @private
template<typename GridT>
typename std::enable_if<std::is_same<MaskValueType, typename GridT::BuildType>::value,
typename GridT::ConstPtr>::type
convertToMaskGrid(const GridT& grid)
{
return grid.copy(); // shallow copy
}
////////////////////////////////////////
/// @private
template<typename GridType>
typename GridType::Ptr
doClip(
const GridType& grid,
const typename GridType::template ValueConverter<MaskValueType>::Type& clipMask,
bool keepInterior)
{
using TreeT = typename GridType::TreeType;
using MaskTreeT = typename GridType::TreeType::template ValueConverter<MaskValueType>::Type;
const auto gridClass = grid.getGridClass();
const auto& tree = grid.tree();
MaskTreeT gridMask(false);
gridMask.topologyUnion(tree);
if (gridClass == GRID_LEVEL_SET) {
tree::LeafManager<MaskTreeT> leafNodes(gridMask);
leafNodes.foreach(MaskInteriorVoxels<TreeT>(tree));
tree::ValueAccessor<const TreeT> acc(tree);
typename MaskTreeT::ValueAllIter iter(gridMask);
iter.setMaxDepth(MaskTreeT::ValueAllIter::LEAF_DEPTH - 1);
for ( ; iter; ++iter) {
iter.setActiveState(math::isNegative(acc.getValue(iter.getCoord())));
}
}
if (keepInterior) {
gridMask.topologyIntersection(clipMask.constTree());
} else {
gridMask.topologyDifference(clipMask.constTree());
}
auto outGrid = grid.copyWithNewTree();
{
// Copy voxel values and states.
tree::LeafManager<const MaskTreeT> leafNodes(gridMask);
CopyLeafNodes<TreeT> maskOp(tree, leafNodes);
maskOp.run();
outGrid->setTree(maskOp.tree());
}
{
// Copy tile values and states.
tree::ValueAccessor<const TreeT> refAcc(tree);
tree::ValueAccessor<const MaskTreeT> maskAcc(gridMask);
typename TreeT::ValueAllIter it(outGrid->tree());
it.setMaxDepth(TreeT::ValueAllIter::LEAF_DEPTH - 1);
for ( ; it; ++it) {
Coord ijk = it.getCoord();
if (maskAcc.isValueOn(ijk)) {
typename TreeT::ValueType value;
bool isActive = refAcc.probeValue(ijk, value);
it.setValue(value);
if (!isActive) it.setValueOff();
}
}
}
outGrid->setTransform(grid.transform().copy());
if (gridClass != GRID_LEVEL_SET) outGrid->setGridClass(gridClass);
return outGrid;
}
} // namespace clip_internal
/// @endcond
////////////////////////////////////////
/// @private
template<typename GridType>
typename GridType::Ptr
clip(const GridType& grid, const BBoxd& bbox, bool keepInterior)
{
using MaskValueT = clip_internal::MaskValueType;
using MaskGridT = typename GridType::template ValueConverter<MaskValueT>::Type;
// Transform the world-space bounding box into the source grid's index space.
Vec3d idxMin, idxMax;
math::calculateBounds(grid.constTransform(), bbox.min(), bbox.max(), idxMin, idxMax);
CoordBBox region(Coord::floor(idxMin), Coord::floor(idxMax));
// Construct a boolean mask grid that is true inside the index-space bounding box
// and false everywhere else.
MaskGridT clipMask(/*background=*/false);
clipMask.fill(region, /*value=*/true, /*active=*/true);
return clip_internal::doClip(grid, clipMask, keepInterior);
}
/// @private
template<typename SrcGridType, typename ClipTreeType>
typename SrcGridType::Ptr
clip(const SrcGridType& srcGrid, const Grid<ClipTreeType>& clipGrid, bool keepInterior)
{
using MaskValueT = clip_internal::MaskValueType;
using ClipGridType = Grid<ClipTreeType>;
using SrcMaskGridType = typename SrcGridType::template ValueConverter<MaskValueT>::Type;
using ClipMaskGridType = typename ClipGridType::template ValueConverter<MaskValueT>::Type;
// Convert the clipping grid to a boolean-valued mask grid with the same tree configuration.
auto maskGrid = clip_internal::convertToMaskGrid(clipGrid);
// Resample the mask grid into the source grid's index space.
if (srcGrid.constTransform() != maskGrid->constTransform()) {
auto resampledMask = ClipMaskGridType::create(/*background=*/false);
resampledMask->setTransform(srcGrid.constTransform().copy());
tools::resampleToMatch<clip_internal::BoolSampler>(*maskGrid, *resampledMask);
tools::prune(resampledMask->tree());
maskGrid = resampledMask;
}
// Convert the mask grid to a mask grid with the same tree configuration as the source grid.
auto clipMask = clip_internal::ConvertGrid<
/*from=*/ClipMaskGridType, /*to=*/SrcMaskGridType>()(maskGrid);
// Clip the source grid against the mask grid.
return clip_internal::doClip(srcGrid, *clipMask, keepInterior);
}
/// @private
template<typename GridType>
typename GridType::Ptr
clip(const GridType& inGrid, const math::NonlinearFrustumMap& frustumMap, bool keepInterior)
{
using ValueT = typename GridType::ValueType;
using TreeT = typename GridType::TreeType;
using LeafT = typename TreeT::LeafNodeType;
const auto& gridXform = inGrid.transform();
const auto frustumIndexBBox = frustumMap.getBBox();
// Return true if index-space point (i,j,k) lies inside the frustum.
auto frustumContainsCoord = [&](const Coord& ijk) -> bool {
auto xyz = gridXform.indexToWorld(ijk);
xyz = frustumMap.applyInverseMap(xyz);
return frustumIndexBBox.isInside(xyz);
};
// Return the frustum index-space bounding box of the corners of
// the given grid index-space bounding box.
auto toFrustumIndexSpace = [&](const CoordBBox& inBBox) -> BBoxd {
const Coord bounds[2] = { inBBox.min(), inBBox.max() };
Coord ijk;
BBoxd outBBox;
for (int i = 0; i < 8; ++i) {
ijk[0] = bounds[(i & 1) >> 0][0];
ijk[1] = bounds[(i & 2) >> 1][1];
ijk[2] = bounds[(i & 4) >> 2][2];
auto xyz = gridXform.indexToWorld(ijk);
xyz = frustumMap.applyInverseMap(xyz);
outBBox.expand(xyz);
}
return outBBox;
};
// Construct an output grid with the same transform and metadata as the input grid.
auto outGrid = inGrid.copyWithNewTree();
if (outGrid->getGridClass() == GRID_LEVEL_SET) {
// After clipping, a level set grid might no longer be a valid SDF.
outGrid->setGridClass(GRID_UNKNOWN);
}
const auto& bg = outGrid->background();
auto outAcc = outGrid->getAccessor();
// Copy active and inactive tiles that intersect the clipping region
// from the input grid to the output grid.
// ("Clipping region" refers to either the interior or the exterior
// of the frustum, depending on the value of keepInterior.)
auto tileIter = inGrid.beginValueAll();
tileIter.setMaxDepth(GridType::ValueAllIter::LEAF_DEPTH - 1);
CoordBBox tileBBox;
for ( ; tileIter; ++tileIter) {
const bool tileActive = tileIter.isValueOn();
const auto& tileValue = tileIter.getValue();
// Skip background tiles.
if (!tileActive && math::isApproxEqual(tileValue, bg)) continue;
// Transform the tile's bounding box into frustum index space.
tileIter.getBoundingBox(tileBBox);
const auto tileFrustumBBox = toFrustumIndexSpace(tileBBox);
// Determine whether any or all of the tile intersects the clipping region.
enum class CopyTile { kNone, kPartial, kFull };
auto copyTile = CopyTile::kNone;
if (keepInterior) {
if (frustumIndexBBox.isInside(tileFrustumBBox)) {
copyTile = CopyTile::kFull;
} else if (frustumIndexBBox.hasOverlap(tileFrustumBBox)) {
copyTile = CopyTile::kPartial;
}
} else {
if (!frustumIndexBBox.hasOverlap(tileFrustumBBox)) {
copyTile = CopyTile::kFull;
} else if (!frustumIndexBBox.isInside(tileFrustumBBox)) {
copyTile = CopyTile::kPartial;
}
}
switch (copyTile) {
case CopyTile::kNone:
break;
case CopyTile::kFull:
// Copy the entire tile.
outAcc.addTile(tileIter.getLevel(), tileBBox.min(), tileValue, tileActive);
break;
case CopyTile::kPartial:
// Copy only voxels inside the clipping region.
for (std::vector<CoordBBox> bboxVec = { tileBBox }; !bboxVec.empty(); ) {
// For efficiency, subdivide sufficiently large tiles and discard
// subregions based on additional bounding box intersection tests.
// The mimimum subregion size is chosen so that cost of the
// bounding box test is comparable to testing every voxel.
if (bboxVec.back().volume() > 64 && bboxVec.back().is_divisible()) {
// Subdivide this region in-place and append the other half to the list.
bboxVec.emplace_back(bboxVec.back(), tbb::split{});
continue;
}
auto subBBox = bboxVec.back();
bboxVec.pop_back();
// Discard the subregion if it lies completely outside the clipping region.
if (keepInterior) {
if (!frustumIndexBBox.hasOverlap(toFrustumIndexSpace(subBBox))) continue;
} else {
if (frustumIndexBBox.isInside(toFrustumIndexSpace(subBBox))) continue;
}
// Test every voxel within the subregion.
for (const auto& ijk: subBBox) {
if (frustumContainsCoord(ijk) == keepInterior) {
if (tileActive) {
outAcc.setValueOn(ijk, tileValue);
} else {
outAcc.setValueOff(ijk, tileValue);
}
}
}
}
break;
}
}
tools::prune(outGrid->tree());
// Ensure that the output grid has the same leaf node topology as the input grid,
// with the exception of leaf nodes that lie completely outside the clipping region.
// (This operation is serial.)
for (auto leafIter = inGrid.constTree().beginLeaf(); leafIter; ++leafIter) {
const auto leafBBox = leafIter->getNodeBoundingBox();
const auto leafFrustumBBox = toFrustumIndexSpace(leafBBox);
if (keepInterior) {
if (frustumIndexBBox.hasOverlap(leafFrustumBBox)) {
outAcc.touchLeaf(leafBBox.min());
}
} else {
if (!frustumIndexBBox.hasOverlap(leafFrustumBBox)
|| !frustumIndexBBox.isInside(leafFrustumBBox))
{
outAcc.touchLeaf(leafBBox.min());
}
}
}
// In parallel across output leaf nodes, copy leaf voxels
// from the input grid to the output grid.
tree::LeafManager<TreeT> outLeafNodes{outGrid->tree()};
outLeafNodes.foreach(
[&](LeafT& leaf, size_t /*idx*/) {
auto inAcc = inGrid.getConstAccessor();
ValueT val;
for (auto voxelIter = leaf.beginValueAll(); voxelIter; ++voxelIter) {
const auto ijk = voxelIter.getCoord();
if (frustumContainsCoord(ijk) == keepInterior) {
const bool active = inAcc.probeValue(ijk, val);
voxelIter.setValue(val);
voxelIter.setValueOn(active);
}
}
}
);
return outGrid;
}
////////////////////////////////////////
// Explicit Template Instantiation
#ifdef OPENVDB_USE_EXPLICIT_INSTANTIATION
#ifdef OPENVDB_INSTANTIATE_CLIP
#include <openvdb/util/ExplicitInstantiation.h>
#endif
#define _FUNCTION(TreeT) \
Grid<TreeT>::Ptr clip(const Grid<TreeT>&, const BBoxd&, bool)
OPENVDB_VOLUME_TREE_INSTANTIATE(_FUNCTION)
#undef _FUNCTION
#define _FUNCTION(TreeT) \
Grid<TreeT>::Ptr clip(const Grid<TreeT>&, const math::NonlinearFrustumMap&, bool)
OPENVDB_ALL_TREE_INSTANTIATE(_FUNCTION)
#undef _FUNCTION
#define _FUNCTION(TreeT) \
Grid<TreeT>::Ptr clip_internal::doClip(const Grid<TreeT>&, const MaskGrid&, bool)
OPENVDB_VOLUME_TREE_INSTANTIATE(_FUNCTION)
#undef _FUNCTION
#endif // OPENVDB_USE_EXPLICIT_INSTANTIATION
} // namespace tools
} // namespace OPENVDB_VERSION_NAME
} // namespace openvdb
#endif // OPENVDB_TOOLS_CLIP_HAS_BEEN_INCLUDED
ExplicitInstantiation.h
value
ValueT value
Definition GridBuilder.h:1290
GridTransformer.h
Grid.h
LeafManager.h
A LeafManager manages a linear array of pointers to a given tree's leaf nodes, as well as optional au...
Maps.h
Math.h
General-purpose arithmetic and comparison routines, most of which accept arbitrary value types (or at...
PointDataGrid.h
Attribute-owned data structure for points. Point attributes are stored in leaf nodes and ordered by v...
Prune.h
Defined various multi-threaded utility functions for trees.
openvdb::v10_0::Coord::floor
static Coord floor(const Vec3< T > &xyz)
Return the largest integer coordinates that are not greater than xyz (node centered conversion).
Definition Coord.h:56
openvdb::v10_0::Grid
Container class that associates a tree with a transform and metadata.
Definition Grid.h:571
openvdb::v10_0::ValueMask
Definition Types.h:111
openvdb::v10_0::math::BBox::max
const Vec3T & max() const
Return a const reference to the maximum point of this bounding box.
Definition BBox.h:64
openvdb::v10_0::math::BBox::expand
void expand(ElementType padding)
Pad this bounding box.
Definition BBox.h:321
openvdb::v10_0::math::BBox::min
const Vec3T & min() const
Return a const reference to the minimum point of this bounding box.
Definition BBox.h:62
openvdb::v10_0::math::CoordBBox
Axis-aligned bounding box of signed integer coordinates.
Definition Coord.h:249
openvdb::v10_0::math::CoordBBox::min
const Coord & min() const
Definition Coord.h:321
openvdb::v10_0::math::Coord
Signed (x, y, z) 32-bit integer coordinates.
Definition Coord.h:25
openvdb::v10_0::math::NonlinearFrustumMap
This map is composed of three steps. First it will take a box of size (Lx X Ly X Lz) defined by a mem...
Definition Maps.h:1895
openvdb::v10_0::math::NonlinearFrustumMap::getBBox
const BBoxd & getBBox() const
Return the bounding box that defines the frustum in pre-image space.
Definition Maps.h:2366
openvdb::v10_0::math::NonlinearFrustumMap::applyInverseMap
Vec3d applyInverseMap(const Vec3d &in) const override
Return the pre-image of in under the map.
Definition Maps.h:2106
openvdb::v10_0::tree::LeafManager
This class manages a linear array of pointers to a given tree's leaf nodes, as well as optional auxil...
Definition LeafManager.h:85
openvdb::v10_0::tree::LeafManager::foreach
void foreach(const LeafOp &op, bool threaded=true, size_t grainSize=1)
Threaded method that applies a user-supplied functor to each leaf node in the LeafManager.
Definition LeafManager.h:483
openvdb::v10_0::tree::ValueAccessor
Definition ValueAccessor.h:191
openvdb::v10_0::ax::run
OPENVDB_AX_API void run(const char *ax, openvdb::GridBase &grid, const AttributeBindings &bindings={})
Run a full AX pipeline (parse, compile and execute) on a single OpenVDB Grid.
openvdb::v10_0::math::isApproxEqual
bool isApproxEqual(const Type &a, const Type &b, const Type &tolerance)
Return true if a is equal to b to within the given tolerance.
Definition Math.h:406
openvdb::v10_0::math::calculateBounds
OPENVDB_API void calculateBounds(const Transform &t, const Vec3d &minWS, const Vec3d &maxWS, Vec3d &minIS, Vec3d &maxIS)
Calculate an axis-aligned bounding box in index space from an axis-aligned bounding box in world spac...
openvdb::v10_0::math::isNegative
bool isNegative(const Type &x)
Return true if x is less than zero.
Definition Math.h:367
openvdb::v10_0::math::Vec3d
Vec3< double > Vec3d
Definition Vec3.h:664
openvdb::v10_0::tools::prune
void prune(TreeT &tree, typename TreeT::ValueType tolerance=zeroVal< typename TreeT::ValueType >(), bool threaded=true, size_t grainSize=1)
Reduce the memory footprint of a tree by replacing with tiles any nodes whose values are all the same...
Definition Prune.h:335
openvdb::v10_0::tools::clip
GridType::Ptr clip(const GridType &grid, const BBoxd &bbox, bool keepInterior=true)
Clip the given grid against a world-space bounding box and return a new grid containing the result.
Definition Clip.h:352
openvdb::v10_0::tools::resampleToMatch
void resampleToMatch(const GridType &inGrid, GridType &outGrid, Interrupter &interrupter)
Resample an input grid into an output grid of the same type such that, after resampling,...
Definition GridTransformer.h:486
openvdb::v10_0::tree
Definition PointDataGrid.h:169
openvdb::v10_0::GRID_LEVEL_SET
@ GRID_LEVEL_SET
Definition Types.h:416
openvdb::v10_0::GRID_UNKNOWN
@ GRID_UNKNOWN
Definition Types.h:415
openvdb::v10_0::BBoxd
math::BBox< Vec3d > BBoxd
Definition Types.h:84
openvdb
Definition Exceptions.h:13
OPENVDB_VERSION_NAME
#define OPENVDB_VERSION_NAME
The version namespace name for this library version.
Definition version.h.in:121
OPENVDB_USE_VERSION_NAMESPACE
#define OPENVDB_USE_VERSION_NAMESPACE
Definition version.h.in:212
OPENVDB_VOLUME_TREE_INSTANTIATE
#define OPENVDB_VOLUME_TREE_INSTANTIATE(Function)
Definition version.h.in:160
OPENVDB_ALL_TREE_INSTANTIATE
#define OPENVDB_ALL_TREE_INSTANTIATE(Function)
Definition version.h.in:161