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ParticlesToLevelSet.h
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// Copyright Contributors to the OpenVDB Project
// SPDX-License-Identifier: MPL-2.0
/// @author Ken Museth
///
/// @file tools/ParticlesToLevelSet.h
///
/// @brief Rasterize particles with position, radius and velocity
/// into either a boolean mask grid or a narrow-band level set grid.
///
/// @details Optionally, arbitrary attributes on the particles can be transferred,
/// resulting in additional output grids with the same topology as the main grid.
///
/// @note Particle to level set conversion is intended to be combined with
/// some kind of surface postprocessing, using
/// @vdblink::tools::LevelSetFilter LevelSetFilter@endlink, for example.
/// Without such postprocessing the generated surface is typically too noisy and blobby.
/// However, it serves as a great and fast starting point for subsequent
/// level set surface processing and convolution.
///
/// @details For particle access, any class with the following interface may be used
/// (see the unit test or the From Particles Houdini SOP for practical examples):
/// @code
/// struct ParticleList
/// {
/// // Return the total number of particles in the list.
/// // Always required!
/// size_t size() const;
///
/// // Get the world-space position of the nth particle.
/// // Required by rasterizeSpheres().
/// void getPos(size_t n, Vec3R& xyz) const;
///
/// // Get the world-space position and radius of the nth particle.
/// // Required by rasterizeSpheres().
/// void getPosRad(size_t n, Vec3R& xyz, Real& radius) const;
///
/// // Get the world-space position, radius and velocity of the nth particle.
/// // Required by rasterizeTrails().
/// void getPosRadVel(size_t n, Vec3R& xyz, Real& radius, Vec3R& velocity) const;
///
/// // Get the value of the nth particle's user-defined attribute (of type @c AttributeType).
/// // Required only if attribute transfer is enabled in ParticlesToLevelSet.
/// void getAtt(size_t n, AttributeType& att) const;
/// };
/// @endcode
///
/// Some functions accept an interrupter argument. This refers to any class
/// with the following interface:
/// @code
/// struct Interrupter
/// {
/// void start(const char* name = nullptr) // called when computations begin
/// void end() // called when computations end
/// bool wasInterrupted(int percent=-1) // return true to abort computation
/// };
/// @endcode
///
/// The default interrupter is @vdblink::util::NullInterrupter NullInterrupter@endlink,
/// for which all calls are no-ops that incur no computational overhead.
#ifndef OPENVDB_TOOLS_PARTICLES_TO_LEVELSET_HAS_BEEN_INCLUDED
#define OPENVDB_TOOLS_PARTICLES_TO_LEVELSET_HAS_BEEN_INCLUDED
#include <openvdb/Types.h>
#include <openvdb/Grid.h>
#include <openvdb/math/Math.h>
#include <openvdb/math/Transform.h>
#include <openvdb/tree/LeafManager.h>
#include <openvdb/util/logging.h>
#include <openvdb/util/NullInterrupter.h>
#include <openvdb/thread/Threading.h>
#include "Composite.h" // for csgUnion()
#include "PointPartitioner.h"
#include "Prune.h"
#include "SignedFloodFill.h"
#include <tbb/parallel_reduce.h>
#include <tbb/blocked_range.h>
#include <functional>
#include <iostream>
#include <type_traits>
#include <vector>
namespace openvdb {
OPENVDB_USE_VERSION_NAMESPACE
namespace OPENVDB_VERSION_NAME {
namespace tools {
/// @brief Populate a scalar, floating-point grid with CSG-unioned level set spheres
/// described by the given particle positions and radii.
/// @details For more control over the output, including attribute transfer,
/// use the ParticlesToLevelSet class directly.
template<typename GridT, typename ParticleListT, typename InterrupterT = util::NullInterrupter>
inline void particlesToSdf(const ParticleListT&, GridT&, InterrupterT* = nullptr);
/// @brief Populate a scalar, floating-point grid with fixed-size, CSG-unioned
/// level set spheres described by the given particle positions and the specified radius.
/// @details For more control over the output, including attribute transfer,
/// use the ParticlesToLevelSet class directly.
template<typename GridT, typename ParticleListT, typename InterrupterT = util::NullInterrupter>
inline void particlesToSdf(const ParticleListT&, GridT&, Real radius, InterrupterT* = nullptr);
/// @brief Populate a scalar, floating-point grid with CSG-unioned trails
/// of level set spheres with decreasing radius, where the starting position and radius
/// and the direction of each trail is given by particle attributes.
/// @details For more control over the output, including attribute transfer,
/// use the ParticlesToLevelSet class directly.
/// @note The @a delta parameter controls the distance between spheres in a trail.
/// Be careful not to use too small a value.
template<typename GridT, typename ParticleListT, typename InterrupterT = util::NullInterrupter>
inline void particleTrailsToSdf(const ParticleListT&, GridT&, Real delta=1, InterrupterT* =nullptr);
/// @brief Activate a boolean grid wherever it intersects the spheres
/// described by the given particle positions and radii.
/// @details For more control over the output, including attribute transfer,
/// use the ParticlesToLevelSet class directly.
template<typename GridT, typename ParticleListT, typename InterrupterT = util::NullInterrupter>
inline void particlesToMask(const ParticleListT&, GridT&, InterrupterT* = nullptr);
/// @brief Activate a boolean grid wherever it intersects the fixed-size spheres
/// described by the given particle positions and the specified radius.
/// @details For more control over the output, including attribute transfer,
/// use the ParticlesToLevelSet class directly.
template<typename GridT, typename ParticleListT, typename InterrupterT = util::NullInterrupter>
inline void particlesToMask(const ParticleListT&, GridT&, Real radius, InterrupterT* = nullptr);
/// @brief Activate a boolean grid wherever it intersects trails of spheres
/// with decreasing radius, where the starting position and radius and the direction
/// of each trail is given by particle attributes.
/// @details For more control over the output, including attribute transfer,
/// use the ParticlesToLevelSet class directly.
/// @note The @a delta parameter controls the distance between spheres in a trail.
/// Be careful not to use too small a value.
template<typename GridT, typename ParticleListT, typename InterrupterT = util::NullInterrupter>
inline void particleTrailsToMask(const ParticleListT&, GridT&,Real delta=1,InterrupterT* =nullptr);
////////////////////////////////////////
/// @cond OPENVDB_DOCS_INTERNAL
namespace p2ls_internal {
// This is a simple type that combines a distance value and a particle
// attribute. It's required for attribute transfer which is performed
// in the ParticlesToLevelSet::Raster member class defined below.
/// @private
template<typename VisibleT, typename BlindT> class BlindData;
}
/// @endcond
template<typename SdfGridT,
typename AttributeT = void,
typename InterrupterT = util::NullInterrupter>
class ParticlesToLevelSet
{
public:
using DisableT = typename std::is_void<AttributeT>::type;
using InterrupterType = InterrupterT;
using SdfGridType = SdfGridT;
using SdfType = typename SdfGridT::ValueType;
using AttType = typename std::conditional<DisableT::value, size_t, AttributeT>::type;
using AttGridType = typename SdfGridT::template ValueConverter<AttType>::Type;
static const bool OutputIsMask = std::is_same<SdfType, bool>::value;
/// @brief Constructor using an existing boolean or narrow-band level set grid
///
/// @param grid grid into which particles are rasterized
/// @param interrupt callback to interrupt a long-running process
///
/// @details If the input grid is already populated with signed distances,
/// particles are unioned onto the existing level set surface.
///
/// @details The width in voxel units of the generated narrow band level set
/// is given by 2&times;<I>background</I>/<I>dx</I>, where @a background
/// is the background value stored in the grid and @a dx is the voxel size
/// derived from the transform associated with the grid.
/// Also note that &minus;<I>background</I> corresponds to the constant value
/// inside the generated narrow-band level set.
///
/// @note If attribute transfer is enabled, i.e., if @c AttributeT is not @c void,
/// attributes are generated only for voxels that overlap with particles,
/// not for any other preexisting voxels (for which no attributes exist!).
explicit ParticlesToLevelSet(SdfGridT& grid, InterrupterT* interrupt = nullptr);
~ParticlesToLevelSet() { delete mBlindGrid; }
/// @brief This method syncs up the level set and attribute grids
/// and therefore needs to be called before any of those grids are
/// used and after the last call to any of the rasterizer methods.
/// @details It has no effect or overhead if attribute transfer is disabled
/// (i.e., if @c AttributeT is @c void) and @a prune is @c false.
///
/// @note Avoid calling this method more than once, and call it only after
/// all the particles have been rasterized.
void finalize(bool prune = false);
/// @brief Return a pointer to the grid containing the optional user-defined attribute.
/// @warning If attribute transfer is disabled (i.e., if @c AttributeT is @c void)
/// or if @link finalize() finalize@endlink is not called, the pointer will be null.
typename AttGridType::Ptr attributeGrid() { return mAttGrid; }
/// @brief Return the size of a voxel in world units.
Real getVoxelSize() const { return mDx; }
/// @brief Return the half-width of the narrow band in voxel units.
Real getHalfWidth() const { return mHalfWidth; }
/// @brief Return the smallest radius allowed in voxel units.
Real getRmin() const { return mRmin; }
/// @brief Set the smallest radius allowed in voxel units.
void setRmin(Real Rmin) { mRmin = math::Max(Real(0),Rmin); }
/// @brief Return the largest radius allowed in voxel units.
Real getRmax() const { return mRmax; }
/// @brief Set the largest radius allowed in voxel units.
void setRmax(Real Rmax) { mRmax = math::Max(mRmin,Rmax); }
/// @brief Return @c true if any particles were ignored due to their size.
bool ignoredParticles() const { return mMinCount>0 || mMaxCount>0; }
/// @brief Return the number of particles that were ignored because they were
/// smaller than the minimum radius.
size_t getMinCount() const { return mMinCount; }
/// @brief Return the number of particles that were ignored because they were
/// larger than the maximum radius.
size_t getMaxCount() const { return mMaxCount; }
/// @brief Return the grain size used for threading
int getGrainSize() const { return mGrainSize; }
/// @brief Set the grain size used for threading.
/// @note A grain size of zero or less disables threading.
void setGrainSize(int grainSize) { mGrainSize = grainSize; }
/// @brief Rasterize each particle as a sphere with the particle's position and radius.
/// @details For level set output, all spheres are CSG-unioned.
template<typename ParticleListT>
void rasterizeSpheres(const ParticleListT& pa);
/// @brief Rasterize each particle as a sphere with the particle's position
/// and a fixed radius.
/// @details For level set output, all spheres are CSG-unioned.
///
/// @param pa particles with positions
/// @param radius fixed sphere radius in world units.
template<typename ParticleListT>
void rasterizeSpheres(const ParticleListT& pa, Real radius);
/// @brief Rasterize each particle as a trail comprising the CSG union
/// of spheres of decreasing radius.
///
/// @param pa particles with position, radius and velocity.
/// @param delta controls the distance between sphere instances
///
/// @warning Be careful not to use too small values for @a delta,
/// since this can lead to excessive computation per trail (which the
/// interrupter can't stop).
///
/// @note The direction of a trail is opposite to that of the velocity vector,
/// and its length is given by the magnitude of the velocity.
/// The radius at the head of the trail is given by the radius of the particle,
/// and the radius at the tail is @a Rmin voxel units, which has
/// a default value of 1.5 corresponding to the Nyquist frequency!
template<typename ParticleListT>
void rasterizeTrails(const ParticleListT& pa, Real delta=1.0);
private:
using BlindType = p2ls_internal::BlindData<SdfType, AttType>;
using BlindGridType = typename SdfGridT::template ValueConverter<BlindType>::Type;
/// Class with multi-threaded implementation of particle rasterization
template<typename ParticleListT, typename GridT> struct Raster;
SdfGridType* mSdfGrid;
typename AttGridType::Ptr mAttGrid;
BlindGridType* mBlindGrid;
InterrupterT* mInterrupter;
Real mDx, mHalfWidth;
Real mRmin, mRmax; // ignore particles outside this range of radii in voxel
size_t mMinCount, mMaxCount; // counters for ignored particles
int mGrainSize;
}; // class ParticlesToLevelSet
template<typename SdfGridT, typename AttributeT, typename InterrupterT>
inline ParticlesToLevelSet<SdfGridT, AttributeT, InterrupterT>::
ParticlesToLevelSet(SdfGridT& grid, InterrupterT* interrupter) :
mSdfGrid(&grid),
mBlindGrid(nullptr),
mInterrupter(interrupter),
mDx(grid.voxelSize()[0]),
mHalfWidth(grid.background()/mDx),
mRmin(1.5),// corresponds to the Nyquist grid sampling frequency
mRmax(100.0),// corresponds to a huge particle (probably too large!)
mMinCount(0),
mMaxCount(0),
mGrainSize(1)
{
if (!mSdfGrid->hasUniformVoxels()) {
OPENVDB_THROW(RuntimeError, "ParticlesToLevelSet only supports uniform voxels!");
}
if (!DisableT::value) {
mBlindGrid = new BlindGridType(BlindType(grid.background()));
mBlindGrid->setTransform(mSdfGrid->transform().copy());
}
}
template<typename SdfGridT, typename AttributeT, typename InterrupterT>
template<typename ParticleListT>
inline void ParticlesToLevelSet<SdfGridT, AttributeT, InterrupterT>::
rasterizeSpheres(const ParticleListT& pa)
{
if (DisableT::value) {
Raster<ParticleListT, SdfGridT> r(*this, mSdfGrid, pa);
r.rasterizeSpheres();
} else {
Raster<ParticleListT, BlindGridType> r(*this, mBlindGrid, pa);
r.rasterizeSpheres();
}
}
template<typename SdfGridT, typename AttributeT, typename InterrupterT>
template<typename ParticleListT>
inline void ParticlesToLevelSet<SdfGridT, AttributeT, InterrupterT>::
rasterizeSpheres(const ParticleListT& pa, Real radius)
{
if (DisableT::value) {
Raster<ParticleListT, SdfGridT> r(*this, mSdfGrid, pa);
r.rasterizeSpheres(radius/mDx);
} else {
Raster<ParticleListT, BlindGridType> r(*this, mBlindGrid, pa);
r.rasterizeSpheres(radius/mDx);
}
}
template<typename SdfGridT, typename AttributeT, typename InterrupterT>
template<typename ParticleListT>
inline void ParticlesToLevelSet<SdfGridT, AttributeT, InterrupterT>::
rasterizeTrails(const ParticleListT& pa, Real delta)
{
if (DisableT::value) {
Raster<ParticleListT, SdfGridT> r(*this, mSdfGrid, pa);
r.rasterizeTrails(delta);
} else {
Raster<ParticleListT, BlindGridType> r(*this, mBlindGrid, pa);
r.rasterizeTrails(delta);
}
}
template<typename SdfGridT, typename AttributeT, typename InterrupterT>
inline void
ParticlesToLevelSet<SdfGridT, AttributeT, InterrupterT>::finalize(bool prune)
{
OPENVDB_NO_UNREACHABLE_CODE_WARNING_BEGIN
if (!mBlindGrid) {
if (prune) {
if (OutputIsMask) {
tools::prune(mSdfGrid->tree());
} else {
tools::pruneLevelSet(mSdfGrid->tree());
}
}
return;
}
if (prune) tools::prune(mBlindGrid->tree());
using AttTreeT = typename AttGridType::TreeType;
using AttLeafT = typename AttTreeT::LeafNodeType;
using BlindTreeT = typename BlindGridType::TreeType;
using BlindLeafIterT = typename BlindTreeT::LeafCIter;
using BlindLeafT = typename BlindTreeT::LeafNodeType;
using SdfTreeT = typename SdfGridType::TreeType;
using SdfLeafT = typename SdfTreeT::LeafNodeType;
// Use topology copy constructors since output grids have the same topology as mBlindDataGrid
const BlindTreeT& blindTree = mBlindGrid->tree();
// Create the output attribute grid.
typename AttTreeT::Ptr attTree(new AttTreeT(
blindTree, blindTree.background().blind(), openvdb::TopologyCopy()));
// Note this overwrites any existing attribute grids!
mAttGrid = typename AttGridType::Ptr(new AttGridType(attTree));
mAttGrid->setTransform(mBlindGrid->transform().copy());
typename SdfTreeT::Ptr sdfTree; // the output mask or level set tree
// Extract the attribute grid and the mask or level set grid from mBlindDataGrid.
if (OutputIsMask) {
sdfTree.reset(new SdfTreeT(blindTree,
/*off=*/SdfType(0), /*on=*/SdfType(1), TopologyCopy()));
// Copy leaf voxels in parallel.
tree::LeafManager<AttTreeT> leafNodes(*attTree);
leafNodes.foreach([&](AttLeafT& attLeaf, size_t /*leafIndex*/) {
if (const auto* blindLeaf = blindTree.probeConstLeaf(attLeaf.origin())) {
for (auto iter = attLeaf.beginValueOn(); iter; ++iter) {
const auto pos = iter.pos();
attLeaf.setValueOnly(pos, blindLeaf->getValue(pos).blind());
}
}
});
// Copy tiles serially.
const auto blindAcc = mBlindGrid->getConstAccessor();
auto iter = attTree->beginValueOn();
iter.setMaxDepth(AttTreeT::ValueOnIter::LEAF_DEPTH - 1);
for ( ; iter; ++iter) {
iter.modifyValue([&](AttType& v) { v = blindAcc.getValue(iter.getCoord()).blind(); });
}
} else {
// Here we exploit the fact that by design level sets have no active tiles.
// Only leaf voxels can be active.
sdfTree.reset(new SdfTreeT(blindTree, blindTree.background().visible(), TopologyCopy()));
for (BlindLeafIterT n = blindTree.cbeginLeaf(); n; ++n) {
const BlindLeafT& leaf = *n;
const openvdb::Coord xyz = leaf.origin();
// Get leafnodes that were allocated during topology construction!
SdfLeafT* sdfLeaf = sdfTree->probeLeaf(xyz);
AttLeafT* attLeaf = attTree->probeLeaf(xyz);
// Use linear offset (vs coordinate) access for better performance!
typename BlindLeafT::ValueOnCIter m=leaf.cbeginValueOn();
if (!m) {//no active values in leaf node so copy everything
for (openvdb::Index k = 0; k!=BlindLeafT::SIZE; ++k) {
const BlindType& v = leaf.getValue(k);
sdfLeaf->setValueOnly(k, v.visible());
attLeaf->setValueOnly(k, v.blind());
}
} else {//only copy active values (using flood fill for the inactive values)
for(; m; ++m) {
const openvdb::Index k = m.pos();
const BlindType& v = *m;
sdfLeaf->setValueOnly(k, v.visible());
attLeaf->setValueOnly(k, v.blind());
}
}
}
tools::signedFloodFill(*sdfTree);//required since we only transferred active voxels!
}
if (mSdfGrid->empty()) {
mSdfGrid->setTree(sdfTree);
} else {
if (OutputIsMask) {
mSdfGrid->tree().topologyUnion(*sdfTree);
tools::prune(mSdfGrid->tree());
} else {
tools::csgUnion(mSdfGrid->tree(), *sdfTree, /*prune=*/true);
}
}
OPENVDB_NO_UNREACHABLE_CODE_WARNING_END
}
///////////////////////////////////////////////////////////
template<typename SdfGridT, typename AttributeT, typename InterrupterT>
template<typename ParticleListT, typename GridT>
struct ParticlesToLevelSet<SdfGridT, AttributeT, InterrupterT>::Raster
{
using DisableT = typename std::is_void<AttributeT>::type;
using ParticlesToLevelSetT = ParticlesToLevelSet<SdfGridT, AttributeT, InterrupterT>;
using SdfT = typename ParticlesToLevelSetT::SdfType; // type of signed distance values
using AttT = typename ParticlesToLevelSetT::AttType; // type of particle attribute
using ValueT = typename GridT::ValueType;
using AccessorT = typename GridT::Accessor;
using TreeT = typename GridT::TreeType;
using LeafNodeT = typename TreeT::LeafNodeType;
using PointPartitionerT = PointPartitioner<Index32, LeafNodeT::LOG2DIM>;
static const bool
OutputIsMask = std::is_same<SdfT, bool>::value,
DoAttrXfer = !DisableT::value;
/// @brief Main constructor
Raster(ParticlesToLevelSetT& parent, GridT* grid, const ParticleListT& particles)
: mParent(parent)
, mParticles(particles)
, mGrid(grid)
, mMap(*(mGrid->transform().baseMap()))
, mMinCount(0)
, mMaxCount(0)
, mIsCopy(false)
{
mPointPartitioner = new PointPartitionerT;
mPointPartitioner->construct(particles, mGrid->transform());
}
/// @brief Copy constructor called by tbb threads
Raster(Raster& other, tbb::split)
: mParent(other.mParent)
, mParticles(other.mParticles)
, mGrid(new GridT(*other.mGrid, openvdb::ShallowCopy()))
, mMap(other.mMap)
, mMinCount(0)
, mMaxCount(0)
, mTask(other.mTask)
, mIsCopy(true)
, mPointPartitioner(other.mPointPartitioner)
{
mGrid->newTree();
}
virtual ~Raster()
{
// Copy-constructed Rasters own temporary grids that have to be deleted,
// while the original has ownership of the bucket array.
if (mIsCopy) {
delete mGrid;
} else {
delete mPointPartitioner;
}
}
void rasterizeSpheres()
{
mMinCount = mMaxCount = 0;
if (mParent.mInterrupter) {
mParent.mInterrupter->start("Rasterizing particles to level set using spheres");
}
mTask = std::bind(&Raster::rasterSpheres, std::placeholders::_1, std::placeholders::_2);
this->cook();
if (mParent.mInterrupter) mParent.mInterrupter->end();
}
void rasterizeSpheres(Real radius)
{
mMinCount = radius < mParent.mRmin ? mParticles.size() : 0;
mMaxCount = radius > mParent.mRmax ? mParticles.size() : 0;
if (mMinCount>0 || mMaxCount>0) {//skipping all particles!
mParent.mMinCount = mMinCount;
mParent.mMaxCount = mMaxCount;
} else {
if (mParent.mInterrupter) {
mParent.mInterrupter->start(
"Rasterizing particles to level set using const spheres");
}
mTask = std::bind(&Raster::rasterFixedSpheres,
std::placeholders::_1, std::placeholders::_2, radius);
this->cook();
if (mParent.mInterrupter) mParent.mInterrupter->end();
}
}
void rasterizeTrails(Real delta=1.0)
{
mMinCount = mMaxCount = 0;
if (mParent.mInterrupter) {
mParent.mInterrupter->start("Rasterizing particles to level set using trails");
}
mTask = std::bind(&Raster::rasterTrails,
std::placeholders::_1, std::placeholders::_2, delta);
this->cook();
if (mParent.mInterrupter) mParent.mInterrupter->end();
}
/// @brief Kick off the optionally multithreaded computation.
void operator()(const tbb::blocked_range<size_t>& r)
{
assert(mTask);
mTask(this, r);
mParent.mMinCount = mMinCount;
mParent.mMaxCount = mMaxCount;
}
/// @brief Required by tbb::parallel_reduce
void join(Raster& other)
{
OPENVDB_NO_UNREACHABLE_CODE_WARNING_BEGIN
if (OutputIsMask) {
if (DoAttrXfer) {
tools::compMax(*mGrid, *other.mGrid);
} else {
mGrid->topologyUnion(*other.mGrid);
}
} else {
tools::csgUnion(*mGrid, *other.mGrid, /*prune=*/true);
}
OPENVDB_NO_UNREACHABLE_CODE_WARNING_END
mMinCount += other.mMinCount;
mMaxCount += other.mMaxCount;
}
private:
/// Disallow assignment since some of the members are references
Raster& operator=(const Raster&) { return *this; }
/// @return true if the particle is too small or too large
bool ignoreParticle(Real R)
{
if (R < mParent.mRmin) {// below the cutoff radius
++mMinCount;
return true;
}
if (R > mParent.mRmax) {// above the cutoff radius
++mMaxCount;
return true;
}
return false;
}
/// @brief Threaded rasterization of particles as spheres with variable radius
/// @param r range of indices into the list of particles
void rasterSpheres(const tbb::blocked_range<size_t>& r)
{
AccessorT acc = mGrid->getAccessor(); // local accessor
bool run = true;
const Real invDx = 1 / mParent.mDx;
AttT att;
Vec3R pos;
Real rad;
// Loop over buckets
for (size_t n = r.begin(), N = r.end(); n < N; ++n) {
// Loop over particles in bucket n.
typename PointPartitionerT::IndexIterator iter = mPointPartitioner->indices(n);
for ( ; run && iter; ++iter) {
const Index32& id = *iter;
mParticles.getPosRad(id, pos, rad);
const Real R = invDx * rad;// in voxel units
if (this->ignoreParticle(R)) continue;
const Vec3R P = mMap.applyInverseMap(pos);
this->getAtt<DisableT>(id, att);
run = this->makeSphere(P, R, att, acc);
}//end loop over particles
}//end loop over buckets
}
/// @brief Threaded rasterization of particles as spheres with a fixed radius
/// @param r range of indices into the list of particles
/// @param R radius of fixed-size spheres
void rasterFixedSpheres(const tbb::blocked_range<size_t>& r, Real R)
{
AccessorT acc = mGrid->getAccessor(); // local accessor
AttT att;
Vec3R pos;
// Loop over buckets
for (size_t n = r.begin(), N = r.end(); n < N; ++n) {
// Loop over particles in bucket n.
for (auto iter = mPointPartitioner->indices(n); iter; ++iter) {
const Index32& id = *iter;
this->getAtt<DisableT>(id, att);
mParticles.getPos(id, pos);
const Vec3R P = mMap.applyInverseMap(pos);
this->makeSphere(P, R, att, acc);
}
}
}
/// @brief Threaded rasterization of particles as spheres with velocity trails
/// @param r range of indices into the list of particles
/// @param delta inter-sphere spacing
void rasterTrails(const tbb::blocked_range<size_t>& r, Real delta)
{
AccessorT acc = mGrid->getAccessor(); // local accessor
bool run = true;
AttT att;
Vec3R pos, vel;
Real rad;
const Vec3R origin = mMap.applyInverseMap(Vec3R(0,0,0));
const Real Rmin = mParent.mRmin, invDx = 1 / mParent.mDx;
// Loop over buckets
for (size_t n = r.begin(), N = r.end(); n < N; ++n) {
// Loop over particles in bucket n.
typename PointPartitionerT::IndexIterator iter = mPointPartitioner->indices(n);
for ( ; run && iter; ++iter) {
const Index32& id = *iter;
mParticles.getPosRadVel(id, pos, rad, vel);
const Real R0 = invDx * rad;
if (this->ignoreParticle(R0)) continue;
this->getAtt<DisableT>(id, att);
const Vec3R P0 = mMap.applyInverseMap(pos);
const Vec3R V = mMap.applyInverseMap(vel) - origin; // exclude translation
const Real speed = V.length(), invSpeed = 1.0 / speed;
const Vec3R Nrml = -V * invSpeed; // inverse normalized direction
Vec3R P = P0; // local position of instance
Real R = R0, d = 0; // local radius and length of trail
for (size_t m = 0; run && d <= speed ; ++m) {
run = this->makeSphere(P, R, att, acc);
P += 0.5 * delta * R * Nrml; // adaptive offset along inverse velocity direction
d = (P - P0).length(); // current length of trail
R = R0 - (R0 - Rmin) * d * invSpeed; // R = R0 -> mRmin(e.g. 1.5)
}//end loop over sphere instances
}//end loop over particles
}//end loop over buckets
}
void cook()
{
// parallelize over the point buckets
const Index32 bucketCount = Index32(mPointPartitioner->size());
if (mParent.mGrainSize>0) {
tbb::parallel_reduce(
tbb::blocked_range<size_t>(0, bucketCount, mParent.mGrainSize), *this);
} else {
(*this)(tbb::blocked_range<size_t>(0, bucketCount));
}
}
/// @brief Rasterize sphere at position P and radius R into
/// a narrow-band level set with half-width, mHalfWidth.
/// @return @c false if rasterization was interrupted
///
/// @param P coordinates of the particle position in voxel units
/// @param R radius of particle in voxel units
/// @param att an optional user-defined attribute value to be associated with voxels
/// @param acc grid accessor with a private copy of the grid
///
/// @note For best performance all computations are performed in voxel space,
/// with the important exception of the final level set value that is converted
/// to world units (the grid stores the closest Euclidean signed distances
/// measured in world units). Also note we use the convention of positive distances
/// outside the surface and negative distances inside the surface.
template <bool IsMaskT = OutputIsMask>
typename std::enable_if<!IsMaskT, bool>::type
makeSphere(const Vec3R& P, Real R, const AttT& att, AccessorT& acc)
{
const Real
dx = mParent.mDx,
w = mParent.mHalfWidth,
max = R + w, // maximum distance in voxel units
max2 = math::Pow2(max), // square of maximum distance in voxel units
min2 = math::Pow2(math::Max(Real(0), R - w)); // square of minimum distance
// Bounding box of the sphere
const Coord
lo(math::Floor(P[0]-max),math::Floor(P[1]-max),math::Floor(P[2]-max)),
hi(math::Ceil( P[0]+max),math::Ceil( P[1]+max),math::Ceil( P[2]+max));
const ValueT inside = -mGrid->background();
ValueT v;
size_t count = 0;
for (Coord c = lo; c.x() <= hi.x(); ++c.x()) {
//only check interrupter every 32'th scan in x
if (!(count++ & ((1<<5)-1)) && util::wasInterrupted(mParent.mInterrupter)) {
thread::cancelGroupExecution();
return false;
}
const Real x2 = math::Pow2(c.x() - P[0]);
for (c.y() = lo.y(); c.y() <= hi.y(); ++c.y()) {
const Real x2y2 = x2 + math::Pow2(c.y() - P[1]);
for (c.z() = lo.z(); c.z() <= hi.z(); ++c.z()) {
const Real x2y2z2 = x2y2 + math::Pow2(c.z()-P[2]); // squared dist from c to P
#if defined __INTEL_COMPILER
_Pragma("warning (push)")
_Pragma("warning (disable:186)") // "pointless comparison of unsigned integer with zero"
#endif
if (x2y2z2 >= max2 || (!acc.probeValue(c, v) && (v < ValueT(0))))
continue;//outside narrow band of the particle or inside existing level set
#if defined __INTEL_COMPILER
_Pragma("warning (pop)")
#endif
if (x2y2z2 <= min2) {//inside narrow band of the particle.
acc.setValueOff(c, inside);
continue;
}
// convert signed distance from voxel units to world units
//const ValueT d=dx*(math::Sqrt(x2y2z2) - R);
const ValueT d = Merge(static_cast<SdfT>(dx*(math::Sqrt(x2y2z2)-R)), att);
if (d < v) acc.setValue(c, d);//CSG union
}//end loop over z
}//end loop over y
}//end loop over x
return true;
}
/// @brief Rasterize a sphere of radius @a r at position @a p into a boolean mask grid.
/// @return @c false if rasterization was interrupted
template <bool IsMaskT = OutputIsMask>
typename std::enable_if<IsMaskT, bool>::type
makeSphere(const Vec3R& p, Real r, const AttT& att, AccessorT& acc)
{
const Real
rSquared = r * r, // sphere radius squared, in voxel units
inW = r / math::Sqrt(6.0); // half the width in voxel units of an inscribed cube
const Coord
// Bounding box of the sphere
outLo(math::Floor(p[0] - r), math::Floor(p[1] - r), math::Floor(p[2] - r)),
outHi(math::Ceil(p[0] + r), math::Ceil(p[1] + r), math::Ceil(p[2] + r)),
// Bounds of the inscribed cube
inLo(math::Ceil(p[0] - inW), math::Ceil(p[1] - inW), math::Ceil(p[2] - inW)),
inHi(math::Floor(p[0] + inW), math::Floor(p[1] + inW), math::Floor(p[2] + inW));
// Bounding boxes of regions comprising out - in
/// @todo These could be divided further into sparsely- and densely-filled subregions.
const std::vector<CoordBBox> padding{
CoordBBox(outLo.x(), outLo.y(), outLo.z(), inLo.x()-1, outHi.y(), outHi.z()),
CoordBBox(inHi.x()+1, outLo.y(), outLo.z(), outHi.x(), outHi.y(), outHi.z()),
CoordBBox(outLo.x(), outLo.y(), outLo.z(), outHi.x(), inLo.y()-1, outHi.z()),
CoordBBox(outLo.x(), inHi.y()+1, outLo.z(), outHi.x(), outHi.y(), outHi.z()),
CoordBBox(outLo.x(), outLo.y(), outLo.z(), outHi.x(), outHi.y(), inLo.z()-1),
CoordBBox(outLo.x(), outLo.y(), inHi.z()+1, outHi.x(), outHi.y(), outHi.z()),
};
const ValueT onValue = Merge(SdfT(1), att);
// Sparsely fill the inscribed cube.
/// @todo Use sparse fill only if 2r > leaf width?
acc.tree().sparseFill(CoordBBox(inLo, inHi), onValue);
// Densely fill the remaining regions.
for (const auto& bbox: padding) {
if (util::wasInterrupted(mParent.mInterrupter)) {
thread::cancelGroupExecution();
return false;
}
const Coord &bmin = bbox.min(), &bmax = bbox.max();
Coord c;
Real cx, cy, cz;
for (c = bmin, cx = c.x(); c.x() <= bmax.x(); ++c.x(), cx += 1) {
const Real x2 = math::Pow2(cx - p[0]);
for (c.y() = bmin.y(), cy = c.y(); c.y() <= bmax.y(); ++c.y(), cy += 1) {
const Real x2y2 = x2 + math::Pow2(cy - p[1]);
for (c.z() = bmin.z(), cz = c.z(); c.z() <= bmax.z(); ++c.z(), cz += 1) {
const Real x2y2z2 = x2y2 + math::Pow2(cz - p[2]);
if (x2y2z2 < rSquared) {
acc.setValue(c, onValue);
}
}
}
}
}
return true;
}
using FuncType = typename std::function<void (Raster*, const tbb::blocked_range<size_t>&)>;
template<typename DisableType>
typename std::enable_if<DisableType::value>::type
getAtt(size_t, AttT&) const {}
template<typename DisableType>
typename std::enable_if<!DisableType::value>::type
getAtt(size_t n, AttT& a) const { mParticles.getAtt(n, a); }
template<typename T>
typename std::enable_if<std::is_same<T, ValueT>::value, ValueT>::type
Merge(T s, const AttT&) const { return s; }
template<typename T>
typename std::enable_if<!std::is_same<T, ValueT>::value, ValueT>::type
Merge(T s, const AttT& a) const { return ValueT(s,a); }
ParticlesToLevelSetT& mParent;
const ParticleListT& mParticles;//list of particles
GridT* mGrid;
const math::MapBase& mMap;
size_t mMinCount, mMaxCount;//counters for ignored particles!
FuncType mTask;
const bool mIsCopy;
PointPartitionerT* mPointPartitioner;
}; // struct ParticlesToLevelSet::Raster
///////////////////// YOU CAN SAFELY IGNORE THIS SECTION /////////////////////
/// @cond OPENVDB_DOCS_INTERNAL
namespace p2ls_internal {
// This is a simple type that combines a distance value and a particle
// attribute. It's required for attribute transfer which is defined in the
// Raster class above.
/// @private
template<typename VisibleT, typename BlindT>
class BlindData
{
public:
using type = VisibleT;
using VisibleType = VisibleT;
using BlindType = BlindT;
BlindData() {}
explicit BlindData(VisibleT v) : mVisible(v), mBlind(zeroVal<BlindType>()) {}
BlindData(VisibleT v, BlindT b) : mVisible(v), mBlind(b) {}
BlindData(const BlindData&) = default;
BlindData& operator=(const BlindData&) = default;
const VisibleT& visible() const { return mVisible; }
const BlindT& blind() const { return mBlind; }
OPENVDB_NO_FP_EQUALITY_WARNING_BEGIN
bool operator==(const BlindData& rhs) const { return mVisible == rhs.mVisible; }
OPENVDB_NO_FP_EQUALITY_WARNING_END
bool operator< (const BlindData& rhs) const { return mVisible < rhs.mVisible; }
bool operator> (const BlindData& rhs) const { return mVisible > rhs.mVisible; }
BlindData operator+(const BlindData& rhs) const { return BlindData(mVisible + rhs.mVisible); }
BlindData operator-(const BlindData& rhs) const { return BlindData(mVisible - rhs.mVisible); }
BlindData operator-() const { return BlindData(-mVisible, mBlind); }
protected:
VisibleT mVisible;
BlindT mBlind;
};
/// @private
// Required by several of the tree nodes
template<typename VisibleT, typename BlindT>
inline std::ostream& operator<<(std::ostream& ostr, const BlindData<VisibleT, BlindT>& rhs)
{
ostr << rhs.visible();
return ostr;
}
/// @private
// Required by math::Abs
template<typename VisibleT, typename BlindT>
inline BlindData<VisibleT, BlindT> Abs(const BlindData<VisibleT, BlindT>& x)
{
return BlindData<VisibleT, BlindT>(math::Abs(x.visible()), x.blind());
}
/// @private
// Required to support the (zeroVal<BlindData>() + val) idiom.
template<typename VisibleT, typename BlindT, typename T>
inline BlindData<VisibleT, BlindT>
operator+(const BlindData<VisibleT, BlindT>& x, const T& rhs)
{
return BlindData<VisibleT, BlindT>(x.visible() + static_cast<VisibleT>(rhs), x.blind());
}
} // namespace p2ls_internal
/// @endcond
//////////////////////////////////////////////////////////////////////////////
// The following are convenience functions for common use cases.
template<typename GridT, typename ParticleListT, typename InterrupterT>
inline void
particlesToSdf(const ParticleListT& plist, GridT& grid, InterrupterT* interrupt)
{
static_assert(std::is_floating_point<typename GridT::ValueType>::value,
"particlesToSdf requires an SDF grid with floating-point values");
if (grid.getGridClass() != GRID_LEVEL_SET) {
OPENVDB_LOG_WARN("particlesToSdf requires a level set grid;"
" try Grid::setGridClass(openvdb::GRID_LEVEL_SET)");
}
ParticlesToLevelSet<GridT> p2ls(grid, interrupt);
p2ls.rasterizeSpheres(plist);
tools::pruneLevelSet(grid.tree());
}
template<typename GridT, typename ParticleListT, typename InterrupterT>
inline void
particlesToSdf(const ParticleListT& plist, GridT& grid, Real radius, InterrupterT* interrupt)
{
static_assert(std::is_floating_point<typename GridT::ValueType>::value,
"particlesToSdf requires an SDF grid with floating-point values");
if (grid.getGridClass() != GRID_LEVEL_SET) {
OPENVDB_LOG_WARN("particlesToSdf requires a level set grid;"
" try Grid::setGridClass(openvdb::GRID_LEVEL_SET)");
}
ParticlesToLevelSet<GridT> p2ls(grid, interrupt);
p2ls.rasterizeSpheres(plist, radius);
tools::pruneLevelSet(grid.tree());
}
template<typename GridT, typename ParticleListT, typename InterrupterT>
inline void
particleTrailsToSdf(const ParticleListT& plist, GridT& grid, Real delta, InterrupterT* interrupt)
{
static_assert(std::is_floating_point<typename GridT::ValueType>::value,
"particleTrailsToSdf requires an SDF grid with floating-point values");
if (grid.getGridClass() != GRID_LEVEL_SET) {
OPENVDB_LOG_WARN("particlesToSdf requires a level set grid;"
" try Grid::setGridClass(openvdb::GRID_LEVEL_SET)");
}
ParticlesToLevelSet<GridT> p2ls(grid, interrupt);
p2ls.rasterizeTrails(plist, delta);
tools::pruneLevelSet(grid.tree());
}
template<typename GridT, typename ParticleListT, typename InterrupterT>
inline void
particlesToMask(const ParticleListT& plist, GridT& grid, InterrupterT* interrupt)
{
static_assert(std::is_same<bool, typename GridT::ValueType>::value,
"particlesToMask requires a boolean-valued grid");
ParticlesToLevelSet<GridT> p2ls(grid, interrupt);
p2ls.rasterizeSpheres(plist);
tools::prune(grid.tree());
}
template<typename GridT, typename ParticleListT, typename InterrupterT>
inline void
particlesToMask(const ParticleListT& plist, GridT& grid, Real radius, InterrupterT* interrupt)
{
static_assert(std::is_same<bool, typename GridT::ValueType>::value,
"particlesToMask requires a boolean-valued grid");
ParticlesToLevelSet<GridT> p2ls(grid, interrupt);
p2ls.rasterizeSpheres(plist, radius);
tools::prune(grid.tree());
}
template<typename GridT, typename ParticleListT, typename InterrupterT>
inline void
particleTrailsToMask(const ParticleListT& plist, GridT& grid, Real delta, InterrupterT* interrupt)
{
static_assert(std::is_same<bool, typename GridT::ValueType>::value,
"particleTrailsToMask requires a boolean-valued grid");
ParticlesToLevelSet<GridT> p2ls(grid, interrupt);
p2ls.rasterizeTrails(plist, delta);
tools::prune(grid.tree());
}
} // namespace tools
} // namespace OPENVDB_VERSION_NAME
} // namespace openvdb
#endif // OPENVDB_TOOLS_PARTICLES_TO_LEVELSET_HAS_BEEN_INCLUDED
Composite.h
Functions to efficiently perform various compositing operations on grids.
Grid.h
LeafManager.h
A LeafManager manages a linear array of pointers to a given tree's leaf nodes, as well as optional au...
Math.h
General-purpose arithmetic and comparison routines, most of which accept arbitrary value types (or at...
OPENVDB_NO_FP_EQUALITY_WARNING_END
#define OPENVDB_NO_FP_EQUALITY_WARNING_END
Definition Math.h:49
OPENVDB_NO_FP_EQUALITY_WARNING_BEGIN
#define OPENVDB_NO_FP_EQUALITY_WARNING_BEGIN
Definition Math.h:48
NullInterrupter.h
OPENVDB_NO_UNREACHABLE_CODE_WARNING_END
#define OPENVDB_NO_UNREACHABLE_CODE_WARNING_END
Definition Platform.h:118
OPENVDB_NO_UNREACHABLE_CODE_WARNING_BEGIN
#define OPENVDB_NO_UNREACHABLE_CODE_WARNING_BEGIN
Definition Platform.h:117
PointPartitioner.h
Spatially partitions points using a parallel radix-based sorting algorithm.
Prune.h
Defined various multi-threaded utility functions for trees.
SignedFloodFill.h
Propagate the signs of distance values from the active voxels in the narrow band to the inactive valu...
Transform.h
openvdb::v10_0::ShallowCopy
Tag dispatch class that distinguishes shallow copy constructors from deep copy constructors.
Definition Types.h:641
openvdb::v10_0::TopologyCopy
Tag dispatch class that distinguishes topology copy constructors from deep copy constructors.
Definition Types.h:644
openvdb::v10_0::math::Coord
Signed (x, y, z) 32-bit integer coordinates.
Definition Coord.h:25
openvdb::v10_0::math::Vec3::length
T length() const
Length of the vector.
Definition Vec3.h:200
openvdb::v10_0::tools::ParticlesToLevelSet
Definition ParticlesToLevelSet.h:160
openvdb::v10_0::tools::ParticlesToLevelSet::InterrupterType
InterrupterT InterrupterType
Definition ParticlesToLevelSet.h:163
openvdb::v10_0::tools::ParticlesToLevelSet::rasterizeTrails
void rasterizeTrails(const ParticleListT &pa, Real delta=1.0)
Rasterize each particle as a trail comprising the CSG union of spheres of decreasing radius.
Definition ParticlesToLevelSet.h:345
openvdb::v10_0::tools::ParticlesToLevelSet::setRmax
void setRmax(Real Rmax)
Set the largest radius allowed in voxel units.
Definition ParticlesToLevelSet.h:224
openvdb::v10_0::tools::ParticlesToLevelSet::ParticlesToLevelSet
ParticlesToLevelSet(SdfGridT &grid, InterrupterT *interrupt=nullptr)
Constructor using an existing boolean or narrow-band level set grid.
Definition ParticlesToLevelSet.h:293
openvdb::v10_0::tools::ParticlesToLevelSet::getRmin
Real getRmin() const
Return the smallest radius allowed in voxel units.
Definition ParticlesToLevelSet.h:217
openvdb::v10_0::tools::ParticlesToLevelSet::finalize
void finalize(bool prune=false)
This method syncs up the level set and attribute grids and therefore needs to be called before any of...
Definition ParticlesToLevelSet.h:359
openvdb::v10_0::tools::ParticlesToLevelSet::rasterizeSpheres
void rasterizeSpheres(const ParticleListT &pa, Real radius)
Rasterize each particle as a sphere with the particle's position and a fixed radius.
Definition ParticlesToLevelSet.h:331
openvdb::v10_0::tools::ParticlesToLevelSet::setGrainSize
void setGrainSize(int grainSize)
Set the grain size used for threading.
Definition ParticlesToLevelSet.h:239
openvdb::v10_0::tools::ParticlesToLevelSet::getRmax
Real getRmax() const
Return the largest radius allowed in voxel units.
Definition ParticlesToLevelSet.h:222
openvdb::v10_0::tools::ParticlesToLevelSet::getVoxelSize
Real getVoxelSize() const
Return the size of a voxel in world units.
Definition ParticlesToLevelSet.h:211
openvdb::v10_0::tools::ParticlesToLevelSet::~ParticlesToLevelSet
~ParticlesToLevelSet()
Definition ParticlesToLevelSet.h:193
openvdb::v10_0::tools::ParticlesToLevelSet::getHalfWidth
Real getHalfWidth() const
Return the half-width of the narrow band in voxel units.
Definition ParticlesToLevelSet.h:214
openvdb::v10_0::tools::ParticlesToLevelSet::getMinCount
size_t getMinCount() const
Return the number of particles that were ignored because they were smaller than the minimum radius.
Definition ParticlesToLevelSet.h:230
openvdb::v10_0::tools::ParticlesToLevelSet::SdfType
typename SdfGridT::ValueType SdfType
Definition ParticlesToLevelSet.h:166
openvdb::v10_0::tools::ParticlesToLevelSet::rasterizeSpheres
void rasterizeSpheres(const ParticleListT &pa)
Rasterize each particle as a sphere with the particle's position and radius.
Definition ParticlesToLevelSet.h:317
openvdb::v10_0::tools::ParticlesToLevelSet::getGrainSize
int getGrainSize() const
Return the grain size used for threading.
Definition ParticlesToLevelSet.h:236
openvdb::v10_0::tools::ParticlesToLevelSet::attributeGrid
AttGridType::Ptr attributeGrid()
Return a pointer to the grid containing the optional user-defined attribute.
Definition ParticlesToLevelSet.h:208
openvdb::v10_0::tools::ParticlesToLevelSet::ignoredParticles
bool ignoredParticles() const
Return true if any particles were ignored due to their size.
Definition ParticlesToLevelSet.h:227
openvdb::v10_0::tools::ParticlesToLevelSet::DisableT
typename std::is_void< AttributeT >::type DisableT
Definition ParticlesToLevelSet.h:162
openvdb::v10_0::tools::ParticlesToLevelSet< SdfGridT, AttributeT, InterrupterT >::OutputIsMask
static const bool OutputIsMask
Definition ParticlesToLevelSet.h:171
openvdb::v10_0::tools::ParticlesToLevelSet::AttType
typename std::conditional< DisableT::value, size_t, AttributeT >::type AttType
Definition ParticlesToLevelSet.h:168
openvdb::v10_0::tools::ParticlesToLevelSet::AttGridType
typename SdfGridT::template ValueConverter< AttType >::Type AttGridType
Definition ParticlesToLevelSet.h:169
openvdb::v10_0::tools::ParticlesToLevelSet::setRmin
void setRmin(Real Rmin)
Set the smallest radius allowed in voxel units.
Definition ParticlesToLevelSet.h:219
openvdb::v10_0::tools::ParticlesToLevelSet::getMaxCount
size_t getMaxCount() const
Return the number of particles that were ignored because they were larger than the maximum radius.
Definition ParticlesToLevelSet.h:233
openvdb::v10_0::tools::ParticlesToLevelSet::SdfGridType
SdfGridT SdfGridType
Definition ParticlesToLevelSet.h:165
openvdb::v10_0::tools::PointPartitioner
Definition PointPartitioner.h:77
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
logging.h
OPENVDB_LOG_WARN
#define OPENVDB_LOG_WARN(message)
Log a warning message of the form 'someVar << "some text" << ...'.
Definition logging.h:256
nanovdb::CoordBBox
BBox< Coord > CoordBBox
Definition NanoVDB.h:1809
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::operator==
bool operator==(const Vec3< T0 > &v0, const Vec3< T1 > &v1)
Equality operator, does exact floating point comparisons.
Definition Vec3.h:473
openvdb::v10_0::math::Ceil
int Ceil(float x)
Return the ceiling of x.
Definition Math.h:856
openvdb::v10_0::math::Sqrt
float Sqrt(float x)
Return the square root of a floating-point value.
Definition Math.h:761
openvdb::v10_0::math::Max
const Type & Max(const Type &a, const Type &b)
Return the maximum of two values.
Definition Math.h:595
openvdb::v10_0::math::operator-
Vec3< typename promote< T, Coord::ValueType >::type > operator-(const Vec3< T > &v0, const Coord &v1)
Allow a Coord to be subtracted from a Vec3.
Definition Coord.h:551
openvdb::v10_0::math::operator+
Vec3< typename promote< T, typename Coord::ValueType >::type > operator+(const Vec3< T > &v0, const Coord &v1)
Allow a Coord to be added to or subtracted from a Vec3.
Definition Coord.h:525
openvdb::v10_0::math::Abs
Coord Abs(const Coord &xyz)
Definition Coord.h:515
openvdb::v10_0::math::Pow2
Type Pow2(Type x)
Return x2.
Definition Math.h:548
openvdb::v10_0::math::Floor
int Floor(float x)
Return the floor of x.
Definition Math.h:848
openvdb::v10_0::tools::composite::max
const std::enable_if<!VecTraits< T >::IsVec, T >::type & max(const T &a, const T &b)
Definition Composite.h:110
openvdb::v10_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:390
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::particlesToMask
void particlesToMask(const ParticleListT &, GridT &, InterrupterT *=nullptr)
Activate a boolean grid wherever it intersects the spheres described by the given particle positions ...
Definition ParticlesToLevelSet.h:991
openvdb::v10_0::tools::compMax
void compMax(GridOrTreeT &a, GridOrTreeT &b)
Given grids A and B, compute max(a, b) per voxel (using sparse traversal). Store the result in the A ...
Definition Composite.h:748
openvdb::v10_0::tools::signedFloodFill
void signedFloodFill(TreeOrLeafManagerT &tree, bool threaded=true, size_t grainSize=1, Index minLevel=0)
Set the values of all inactive voxels and tiles of a narrow-band level set from the signs of the acti...
Definition SignedFloodFill.h:267
openvdb::v10_0::tools::particleTrailsToSdf
void particleTrailsToSdf(const ParticleListT &, GridT &, Real delta=1, InterrupterT *=nullptr)
Populate a scalar, floating-point grid with CSG-unioned trails of level set spheres with decreasing r...
Definition ParticlesToLevelSet.h:974
openvdb::v10_0::tools::particlesToSdf
void particlesToSdf(const ParticleListT &, GridT &, InterrupterT *=nullptr)
Populate a scalar, floating-point grid with CSG-unioned level set spheres described by the given part...
Definition ParticlesToLevelSet.h:940
openvdb::v10_0::tools::csgUnion
void csgUnion(GridOrTreeT &a, GridOrTreeT &b, bool prune=true, bool pruneCancelledTiles=false)
Given two level set grids, replace the A grid with the union of A and B.
Definition Composite.h:881
openvdb::v10_0::tools::particleTrailsToMask
void particleTrailsToMask(const ParticleListT &, GridT &, Real delta=1, InterrupterT *=nullptr)
Activate a boolean grid wherever it intersects trails of spheres with decreasing radius,...
Definition ParticlesToLevelSet.h:1013
openvdb::v10_0::util::wasInterrupted
bool wasInterrupted(T *i, int percent=-1)
Definition NullInterrupter.h:49
openvdb::v10_0::Index
Index32 Index
Definition Types.h:54
openvdb::v10_0::Real
double Real
Definition Types.h:60
openvdb::v10_0::GRID_LEVEL_SET
@ GRID_LEVEL_SET
Definition Types.h:416
openvdb::v10_0::operator<<
std::ostream & operator<<(std::ostream &ostr, const Metadata &metadata)
Write a Metadata to an output stream.
Definition Metadata.h:351
openvdb::v10_0::Index32
uint32_t Index32
Definition Types.h:52
openvdb::v10_0::Vec3R
math::Vec3< Real > Vec3R
Definition Types.h:72
openvdb::v10_0::zeroVal
T zeroVal()
Return the value of type T that corresponds to zero.
Definition Math.h:70
openvdb
Definition Exceptions.h:13
Types.h
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