tools Directory Reference

Files
file	Activate.h [code]
	Implementation of topological activation/deactivation.
file	ChangeBackground.h [code]
	Efficient multi-threaded replacement of the background values in tree.
file	Clip.h [code]
	Functions to clip a grid against a bounding box, a camera frustum, or another grid's active voxel topology.
file	Composite.h [code]
	Functions to efficiently perform various compositing operations on grids.
file	Count.h [code]
	Functions to count tiles, nodes or voxels in a grid.
file	Dense.h [code]
	This file defines a simple dense grid and efficient converters to and from VDB grids.
file	DenseSparseTools.h [code]
file	Diagnostics.h [code]
	Various diagnostic tools to identify potential issues with for example narrow-band level sets or fog volumes.
file	FastSweeping.h [code]
	Defined the six functions {fog,sdf}To{Sdf,Ext,SdfAndExt} in addition to the two functions maskSdf and dilateSdf. Sdf denotes a signed-distance field (i.e. negative values are inside), fog is a scalar fog volume (i.e. higher values are inside), and Ext is a field (of arbitrary type) that is extended off the iso-surface. All these functions are implemented with the methods in the class named FastSweeping.
file	Filter.h [code]
	Filtering of VDB volumes. All operations can optionally be masked with another grid that acts as an alpha-mask. By default, filtering operations do not modify the topology of the input tree and thus do not process active tiles. However Filter::setProcessTiles can be used to process active tiles, densifying them on demand when necessary.
file	FindActiveValues.h [code]
	Finds the active values and tiles in a tree that intersects a bounding box. Methods are provided that count the number of active values and tiles, test for the existence of active values and tiles, and return a list of the active tiles that intersect a bbox.
file	GridOperators.h [code]
	Apply an operator to an input grid to produce an output grid with the same active voxel topology but a potentially different value type.
file	GridTransformer.h [code]
file	Interpolation.h [code]
file	LevelSetAdvect.h [code]
	Hyperbolic advection of narrow-band level sets.
file	LevelSetFilter.h [code]
	Performs various types of level set deformations with interface tracking. These unrestricted deformations include surface smoothing (e.g., Laplacian flow), filtering (e.g., mean value) and morphological operations (e.g., morphological opening). All these operations can optionally be masked with another grid that acts as an alpha-mask.
file	LevelSetFracture.h [code]
	Divide volumes represented by level set grids into multiple, disjoint pieces by intersecting them with one or more "cutter" volumes, also represented by level sets.
file	LevelSetMeasure.h [code]
file	LevelSetMorph.h [code]
	Shape morphology of level sets. Morphing from a source narrow-band level sets to a target narrow-band level set.
file	LevelSetPlatonic.h [code]
	Generate a narrow-band level sets of the five platonic solids.
file	LevelSetRebuild.h [code]
file	LevelSetSphere.h [code]
	Generate a narrow-band level set of sphere.
file	LevelSetTracker.h [code]
	Performs multi-threaded interface tracking of narrow band level sets. This is the building-block for most level set computations that involve dynamic topology, e.g. advection.
file	LevelSetUtil.h [code]
	Miscellaneous utility methods that operate primarily or exclusively on level set grids.
file	Mask.h [code]
	Construct boolean mask grids from grids of arbitrary type.
file	Merge.h [code]
	Functions to efficiently merge grids.
file	MeshToVolume.h [code]
	Convert polygonal meshes that consist of quads and/or triangles into signed or unsigned distance field volumes.
file	Morphology.h [code]
	Implementation of morphological dilation and erosion.
file	MultiResGrid.h [code]
	Multi-resolution grid that contains LoD sequences of trees with powers of two refinements.
file	NodeVisitor.h [code]
	Implementation of a depth-first node visitor.
file	ParticleAtlas.h [code]
	Space-partitioning acceleration structure for particles, points with radius. Partitions particle indices into voxels to accelerate range and nearest neighbor searches.
file	ParticlesToLevelSet.h [code]
	Rasterize particles with position, radius and velocity into either a boolean mask grid or a narrow-band level set grid.
file	PointAdvect.h [code]
	Class PointAdvect advects points (with position) in a static velocity field.
file	PointIndexGrid.h [code]
	Space-partitioning acceleration structure for points. Partitions the points into voxels to accelerate range and nearest neighbor searches.
file	PointPartitioner.h [code]
	Spatially partitions points using a parallel radix-based sorting algorithm.
file	PointScatter.h [code]
	We offer three different algorithms (each in its own class) for scattering of points in active voxels:
file	PointsToMask.h [code]
	This tool produces a grid where every voxel that contains a point is active. It employs thread-local storage for best performance.
file	PoissonSolver.h [code]
	Solve Poisson's equation ∇2x = b for x, where b is a vector comprising the values of all of the active voxels in a grid.
file	PotentialFlow.h [code]
	Tools for creating potential flow fields through solving Laplace's equation.
file	Prune.h [code]
	Defined various multi-threaded utility functions for trees.
file	RayIntersector.h [code]
	Accelerated intersection of a ray with a narrow-band level set or a generic (e.g. density) volume. This will of course be useful for respectively surface and volume rendering.
file	RayTracer.h [code]
	Defines two simple but multithreaded renders, a level-set ray tracer and a volume render. To support these renders we also define perspective and orthographic cameras (both designed to mimic a Houdini camera), a Film class and some rather naive shaders.
file	SignedFloodFill.h [code]
	Propagate the signs of distance values from the active voxels in the narrow band to the inactive values outside the narrow band.
file	Statistics.h [code]
	Functions to efficiently compute histograms, extrema (min/max) and statistics (mean, variance, etc.) of grid values.
file	TopologyToLevelSet.h [code]
	This tool generates a narrow-band signed distance field / level set from the interface between active and inactive voxels in a vdb grid.
file	ValueTransformer.h [code]
file	VectorTransformer.h [code]
file	VelocityFields.h [code]
	Defines two simple wrapper classes for advection velocity fields as well as VelocitySampler and VelocityIntegrator.
file	VolumeAdvect.h [code]
	Sparse hyperbolic advection of volumes, e.g. a density or velocity (vs a level set interface).
file	VolumeToMesh.h [code]
	Extract polygonal surfaces from scalar volumes.
file	VolumeToSpheres.h [code]
	Fill a closed level set or fog volume with adaptively-sized spheres.