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  3. FMeshSurfacePointSampling

FMeshSurfacePointSampling

[FMeshSurfacePointSampling](API\Runtime\GeometryCore\Sampling\FMeshSurfacePointSampling) computes oriented point samples on the surface of a Mesh using various sampling strategies.

API > API/Runtime > API/Runtime/GeometryCore > API/Runtime/GeometryCore/Sampling

References

   
Module GeometryCore
Header /Engine/Source/Runtime/GeometryCore/Public/Sampling/MeshSurfacePointSampling.h
Include #include "Sampling/MeshSurfacePointSampling.h"

Syntax

class FMeshSurfacePointSampling

Remarks

FMeshSurfacePointSampling computes oriented point samples on the surface of a Mesh using various sampling strategies.

Variables

  Type Name Description
Public variable TArray< FVector3d > BarycentricCoords Barycentric Coordinates of each Sample Point in it's respective Triangle.
Public variable bool bComputeBarycentrics If true, barycentric coordinates output array will be populated
Public variable bool bInvertWeights If true, weights are inverted
Public variable bool bUseVertexWeights Control whether VertexWeights (if valid) will be interpolated to modulate sampling
Public variable EInterpretWeightMode InterpretWeightMode Active weight interpretation mode
Public variable double MaxSampleRadius Parameters for non-uniform / variable-radius sampling.
Public variable uint32 MaxSamples Maximum number of samples requested. If 0 or default value, mesh will be maximally sampled
Public variable int32 MaxSubSamplePoints Safety threshold for maximum number of points in subsampling.
Public variable TArray< double > Radii Radius of each Sample Point, length is the same as Samples array
Public variable int32 RandomSeed Random Seed used to initialize sampling strategies
Public variable FGeometryResult Result TODO: when MaxSamples is set, it would be useful to be able to use Weight to modulate positional distribution instead of radius, (or both!) Outputs Result of last computation
Public variable double SampleRadius Basic sampling parameters Desired "radius" of sample points.
Public variable TArray< FFrame3d > Samples Oriented Sample Points on the mesh surface.
Public variable ESizeDistribution SizeDistribution Active Size Distribution mode
Public variable double SizeDistributionPower Used to define how extreme the Size Distribution shift is. Valid range is [1,10]
Public variable double SubSampleDensity Density of subsampling used in Poisson strategy.
Public variable TArray< int32 > TriangleIDs Triangle that contains each Sample Point, length is the same as Samples array
Public variable TArray< double > VertexWeights Per-vertex weights, size must be == Max Vertex Index of input Mesh

Functions

  Type Name Description
Public function void Compute an approximate Poisson sampling of the mesh, either uniform or non-uniform depending on the settings above.

Enums

  Type Name Description
Public enum EInterpretWeightMode Control how active Weights are used to affect point radius  
Public enum ESizeDistribution Controls the distribution of sample radii  

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