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This commit is contained in:
BobSong
2026-01-01 22:00:33 +08:00
parent 040a222bd6
commit 9ceffccd39
1800 changed files with 103929 additions and 139495 deletions
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85
Assets/Obi/Scripts/Common/Backends/Compute/Constraints/Distance/ComputeDistanceConstraintsBatch.cs
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using UnityEngine;
namespace Obi
{
public class ComputeDistanceConstraintsBatch : ComputeConstraintsBatchImpl, IDistanceConstraintsBatchImpl
{
GraphicsBuffer restLengthsBuffer;
GraphicsBuffer stiffnessesBuffer;
public ComputeDistanceConstraintsBatch(ComputeDistanceConstraints constraints)
{
m_Constraints = constraints;
m_ConstraintType = Oni.ConstraintType.Distance;
}
public void SetDistanceConstraints(ObiNativeIntList particleIndices, ObiNativeFloatList restLengths, ObiNativeVector2List stiffnesses, ObiNativeFloatList lambdas, int count)
{
this.particleIndices = particleIndices.AsComputeBuffer<int>();
this.restLengthsBuffer = restLengths.AsComputeBuffer<float>();
this.stiffnessesBuffer = stiffnesses.AsComputeBuffer<Vector2>();
this.lambdas = lambdas.AsComputeBuffer<float>();
this.lambdasList = lambdas;
m_ConstraintCount = count;
}
public override void Evaluate(float stepTime, float substepTime, int steps, float timeLeft)
{
if (m_ConstraintCount > 0)
{
var shader = ((ComputeDistanceConstraints)m_Constraints).constraintsShader;
int projectKernel = ((ComputeDistanceConstraints)m_Constraints).projectKernel;
shader.SetBuffer(projectKernel, "particleIndices", particleIndices);
shader.SetBuffer(projectKernel, "restLengths", restLengthsBuffer);
shader.SetBuffer(projectKernel, "stiffnesses", stiffnessesBuffer);
shader.SetBuffer(projectKernel, "lambdas", lambdas);
shader.SetBuffer(projectKernel, "positions", solverImplementation.positionsBuffer);
shader.SetBuffer(projectKernel, "invMasses", solverImplementation.invMassesBuffer);
shader.SetBuffer(projectKernel, "deltasAsInt", solverImplementation.positionDeltasIntBuffer);
shader.SetBuffer(projectKernel, "positionConstraintCounts", solverImplementation.positionConstraintCountBuffer);
shader.SetInt("activeConstraintCount", m_ConstraintCount);
shader.SetFloat("deltaTime", substepTime);
int threadGroups = ComputeMath.ThreadGroupCount(m_ConstraintCount, 128);
shader.Dispatch(projectKernel, threadGroups, 1, 1);
}
}
public override void Apply(float deltaTime)
{
if (m_ConstraintCount > 0)
{
var parameters = solverAbstraction.GetConstraintParameters(m_ConstraintType);
var shader = ((ComputeDistanceConstraints)m_Constraints).constraintsShader;
int applyKernel = ((ComputeDistanceConstraints)m_Constraints).applyKernel;
shader.SetBuffer(applyKernel, "particleIndices", particleIndices);
shader.SetBuffer(applyKernel, "positions", solverImplementation.positionsBuffer);
shader.SetBuffer(applyKernel, "deltasAsInt", solverImplementation.positionDeltasIntBuffer);
shader.SetBuffer(applyKernel, "positionConstraintCounts", solverImplementation.positionConstraintCountBuffer);
shader.SetInt("activeConstraintCount", m_ConstraintCount);
shader.SetFloat("sorFactor", parameters.SORFactor);
int threadGroups = ComputeMath.ThreadGroupCount(m_ConstraintCount, 128);
shader.Dispatch(applyKernel, threadGroups, 1, 1);
}
}
public void RequestDataReadback()
{
lambdasList.Readback();
}
public void WaitForReadback()
{
lambdasList.WaitForReadback();
}
}
}