Alex Herbert created RNG-132: -------------------------------- Summary: Package rng.sampling.shape for sampling coordinates from shapes Key: RNG-132 URL: https://issues.apache.org/jira/browse/RNG-132 Project: Commons RNG Issue Type: Task Components: sampling Affects Versions: 1.4 Reporter: Alex Herbert Assignee: Alex Herbert
Create a {{rng.sampling.shape}} package in the sampling module to contain work-in-progress samplers for shapes. * UnitSphereSampler1 (N-surface) * UnitBallSampler (N-volume) * UnitSimplexSampler (N-surface) * LineSampler (N-dimension points on a line segment or polyline) * TriangleSampler (N-dimension points within a triangle in a 2D plane) * TetrahedronSampler (3D points inside a tetrahedron) * SurfaceSampler2 (ND points on a triangulated surface) * VolumeSampler (3D points inside a volume composed of tetrahedrons) * UnitCubeSampler (N-volume) 1The UnitSphereSampler can be deprecated and a new version created to use a factory method to create the sampler (allowing optimisation for low dimensions). ^2^The SurfaceSampler would be a composite sampler. For sampling a surface the TriangleSampler can be combined with the AliasMethodSamplerDiscreteSampler. The surface should be triangulated. The area of each triangle is used to create a distribution of which triangle to pick using the alias method. A sample is then taken from the chosen triangle. Shape geometry will not be validated beyond basic testing for non-finite values of input coordinates. Validation of shapes could potentially be done by creating a {{commons-geometry-sampling}} module in the commons geometry project. -- This message was sent by Atlassian Jira (v8.3.4#803005)