/// <summary>
/// A fluid simulation using a hybrid SPH and grid
/// based method. Each SPH particle is calculated
/// against a fixed number of other particles, with
/// the results scaled to account for the particles
/// which are not tested against
/// </summary>
public HybridFluidSim(FSQ finalRender, Device device)
{
_finalRender = finalRender ??
throw new ArgumentNullException(nameof(finalRender));
_device = device ??
throw new ArgumentNullException(nameof(device));
var generatedFilename =
GenerateTempFile(
"HybridFluid/HybridFluidComputeShaders2.hlsl",
ParticleOutputShader.MarkupList.
Concat(ParticleUpdateShader.MarkupList).
Concat(WriteParticlesToSubspaceShader.MarkupList));
const float fieldHalfSize = 500.0f;
const int particleCount = 10000;
_particleBuffers =
new ParticleBuffers(
_device,
new Vector3(fieldHalfSize / 3.0f, fieldHalfSize, 0.0f),
new Vector3(fieldHalfSize * 1.6f, fieldHalfSize, fieldHalfSize),
//new Vector3(fieldHalfSize, fieldHalfSize, 0.0f),
//new Vector3(fieldHalfSize, fieldHalfSize, fieldHalfSize),
particleCount);
_particleUpdateShader =
new ParticleUpdateShader(
generatedFilename,
_device,
_particleBuffers,
particleCount);
_particleOutputShader =
new ParticleOutputShader(
generatedFilename,
_device,
_particleBuffers.ReadBuffer,
_finalRender.UAV,
particleCount);
_subspaceBuffers = new SubspaceBuffers(
_device,
32,
32,
32);
_writeParticlesToSubspaceShader =
new WriteParticlesToSubspaceShader(
generatedFilename,
device,
_subspaceBuffers,
_particleBuffers,
ParticleUpdateShader.ParticleReadSlot);
}
public WriteParticlesToSubspaceShader(
string filename,
Device device,
SubspaceBuffers subspaceBuffers,
ParticleBuffers particleBuffers,
int particleReadSlot) :
base(filename, "WriteParticlesToSubspace", device)
{
_subspaceBuffers = subspaceBuffers ??
throw new ArgumentNullException(nameof(subspaceBuffers));
_particleBuffers = particleBuffers ??
throw new ArgumentNullException(nameof(particleBuffers));
_particleReadSlot = particleReadSlot;
}
/// <summary>
/// Shader which reads in the particles in the read buffer,
/// updates their state (position, velocity etc), and writes
/// them to the output buffer
/// </summary>
public ParticleUpdateShader(
string filename,
Device device,
ParticleBuffers particleBuffer,
int particleCount) :
base(
filename,
"UpdateParticles",
device)
{
_particleBuffer = particleBuffer ??
throw new ArgumentNullException(nameof(particleBuffer));
_threadGroupsX = particleCount / threadGroupSize;
_threadGroupsY = 1;
_threadGroupsZ = 1;
}
