Package cz.fidentis.analyst.engines.sampling.impl

Class PoissonDiskSubSamplingGPU

java.lang.Object

cz.fidentis.analyst.engines.sampling.impl.PointSamplingVisitorImpl

cz.fidentis.analyst.engines.sampling.impl.PoissonDiskSubSampling

cz.fidentis.analyst.engines.sampling.impl.PoissonDiskSubSamplingGPU

All Implemented Interfaces:

MeshVisitor, PointSamplingVisitor

public class PoissonDiskSubSamplingGPU
extends PoissonDiskSubSampling

This implementation overrides PoissonDiskSubSampling sample generation to use GPU-based Ray Casting algorithm implemented in OpenCl. Each instance creates new OpenCL context and is responsible for it's disposing before destruction.

Nested Class Summary

Nested classes/interfaces inherited from class cz.fidentis.analyst.engines.sampling.impl.PoissonDiskSubSampling

PoissonDiskSubSampling.ActiveNode

Field Summary

Fields

Modifier and Type	Field	Description
static final int	MIN_PROJECTION_ITERATIONS
static final double	PROJECTOR_MAX_ANGLE
static final double	PROJECTOR_MIN_ROTATION

Fields inherited from class cz.fidentis.analyst.engines.sampling.impl.PoissonDiskSubSampling

facets, POISSON_MAX_ITERATIONS, smoothing

Constructor Summary

Constructors

Constructor	Description
PoissonDiskSubSamplingGPU(int max, MeshTriangle.Smoothing smoothing)	Constructor for the maximum number of samples.

Method Summary

Modifier and Type	Method	Description
void	dispose()	Dispose all disposable resources this visitor was using.
List<MeshPoint>	getSamples()	Returns a list of vertices reduced according to the strategy.
String	toString()

Methods inherited from class cz.fidentis.analyst.engines.sampling.impl.PoissonDiskSubSampling

addSamplesToKdTree, createProjectorFromGrid, distanceToNumSamples, filterRaysIntersections, generatePoissonSamples, isBackedByOrigMesh, rotateProjectorPlane, setRequiredSamples, visitMeshFacet

Methods inherited from class cz.fidentis.analyst.engines.sampling.impl.PointSamplingVisitorImpl

getRequiredSamples, setRealSamples

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface cz.fidentis.analyst.data.mesh.MeshVisitor

isThreadSafe

Field Details

PROJECTOR_MAX_ANGLE

public static final double PROJECTOR_MAX_ANGLE

See Also:

• Constant Field Values

PROJECTOR_MIN_ROTATION

public static final double PROJECTOR_MIN_ROTATION

See Also:

• Constant Field Values

MIN_PROJECTION_ITERATIONS

public static final int MIN_PROJECTION_ITERATIONS

See Also:

• Constant Field Values

Constructor Details

PoissonDiskSubSamplingGPU

public PoissonDiskSubSamplingGPU(int max,
 MeshTriangle.Smoothing smoothing)

Constructor for the maximum number of samples. The density (minimal distance between samples) is approximated so that the mean absolut percentage error (MAPE) of this approximation is ~ 5.27%, and the median absolute percentage error (MDAPE) is ~ 4.52%.

Parameters:

max - Required number of samples. Must be bigger than zero

smoothing - Surface samples can be equipped by interpolated normal and or adapted position to interpolate surface curvature. Use Smoothing.NONE to simply get samples from triangle planes without normal vectors.

Throws:

IllegalArgumentException - if the input parameter is wrong

Method Details

getSamples

public List<MeshPoint> getSamples()

Description copied from interface: PointSamplingVisitor

Returns a list of vertices reduced according to the strategy. The returned mesh points are backed by original points.

Specified by:

getSamples in interface PointSamplingVisitor

Overrides:

getSamples in class PoissonDiskSubSampling

Returns:

selected vertices of inspected meshes

toString

public String toString()

Overrides:

toString in class PoissonDiskSubSampling

dispose

public void dispose()

Description copied from interface: MeshVisitor

Dispose all disposable resources this visitor was using. Distances can still be retrieved after calling this method. Subclasses should override this method if they need to dispose something.