Class CPUGalGenFallback

java.lang.Object

gaiasky.scene.record.CPUGalGenFallback

public class CPUGalGenFallback
extends Object

CPU equivalent of the GLSL compute shader for procedural billboard particle generation. Produces a List where each ParticleVector contains: [x, y, z, size, r, g, b]

This is not bit-for-bit identical to the GPU shader, but replicates distributions, RNG style (uint state), gaussian/fbm approximations and the main logic.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	CPUGalGenFallback.RNG	Random number generator with some utility functions that mimic the GLSL implementation.

Field Summary

Fields

Modifier and Type	Field	Description
protected static final Logger.Log	logger

Constructor Summary

Constructors

Constructor	Description
CPUGalGenFallback(double bodySize)

Method Summary

Modifier and Type	Method	Description
List<IParticleRecord>	generate(BillboardDataset ds, int globalSeed)	Generate particles for a given BillboardDataset.
List<IParticleRecord>	generateConcurrent(BillboardDataset ds, int globalSeed)	Concurrent version of generate(BillboardDataset, int) using chunked batches.

Methods inherited from class Object

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

Field Details

logger

protected static final Logger.Log logger

Constructor Details

CPUGalGenFallback

public CPUGalGenFallback(double bodySize)

Method Details

generate

public List<IParticleRecord> generate(BillboardDataset ds,
 int globalSeed)

Generate particles for a given BillboardDataset.

Parameters:

ds - BillboardDataset instance (fields read from your class)

globalSeed - integer seed (u_seed)

Returns:

list of IParticleRecord, each with position, size, and color.

generateConcurrent

public List<IParticleRecord> generateConcurrent(BillboardDataset ds,
 int globalSeed)

Concurrent version of generate(BillboardDataset, int) using chunked batches.

Parameters:

ds - BillboardDataset instance (fields read from your class)

globalSeed - integer seed (u_seed)

Returns:

list of IParticleRecord, each with position, size, and color.