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去掉obi，使用自写绳索

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BobSong
2026-02-23 20:51:03 +08:00
parent cb636f862d
commit 91e2309eeb
2011 changed files with 2593 additions and 190578 deletions
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26
Assets/Obi/Scripts/Common/Backends/Burst/Constraints/Aerodynamics/BurstAerodynamicConstraints.cs
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#if (OBI_BURST && OBI_MATHEMATICS && OBI_COLLECTIONS)
using System;
namespace Obi
{
public class BurstAerodynamicConstraints : BurstConstraintsImpl<BurstAerodynamicConstraintsBatch>
{
public BurstAerodynamicConstraints(BurstSolverImpl solver) : base(solver, Oni.ConstraintType.Aerodynamics)
{
}
public override IConstraintsBatchImpl CreateConstraintsBatch()
{
var dataBatch = new BurstAerodynamicConstraintsBatch(this);
batches.Add(dataBatch);
return dataBatch;
}
public override void RemoveBatch(IConstraintsBatchImpl batch)
{
batches.Remove(batch as BurstAerodynamicConstraintsBatch);
batch.Destroy();
}
}
}
#endif

11
Assets/Obi/Scripts/Common/Backends/Burst/Constraints/Aerodynamics/BurstAerodynamicConstraints.cs.meta
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112
Assets/Obi/Scripts/Common/Backends/Burst/Constraints/Aerodynamics/BurstAerodynamicConstraintsBatch.cs
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#if (OBI_BURST && OBI_MATHEMATICS && OBI_COLLECTIONS)
using UnityEngine;
using Unity.Jobs;
using Unity.Collections;
using Unity.Collections.LowLevel.Unsafe;
using Unity.Mathematics;
using Unity.Burst;
using System.Collections;
namespace Obi
{
public class BurstAerodynamicConstraintsBatch : BurstConstraintsBatchImpl, IAerodynamicConstraintsBatchImpl
{
private NativeArray<float> aerodynamicCoeffs;
public BurstAerodynamicConstraintsBatch(BurstAerodynamicConstraints constraints)
{
m_Constraints = constraints;
m_ConstraintType = Oni.ConstraintType.Aerodynamics;
}
public void SetAerodynamicConstraints(ObiNativeIntList particleIndices, ObiNativeFloatList aerodynamicCoeffs, int count)
{
this.particleIndices = particleIndices.AsNativeArray<int>();
this.aerodynamicCoeffs = aerodynamicCoeffs.AsNativeArray<float>();
m_ConstraintCount = count;
}
public override JobHandle Initialize(JobHandle inputDeps, float stepTime, float substepTime, int steps, float timeLeft)
{
return inputDeps;
}
public override JobHandle Evaluate(JobHandle inputDeps, float stepTime, float substepTime, int steps, float timeLeft)
{
var projectConstraints = new AerodynamicConstraintsBatchJob()
{
particleIndices = particleIndices,
aerodynamicCoeffs = aerodynamicCoeffs,
positions = solverImplementation.positions,
velocities = solverImplementation.velocities,
normals = solverImplementation.normals,
wind = solverImplementation.wind,
invMasses = solverImplementation.invMasses,
deltaTime = substepTime
};
return projectConstraints.Schedule(m_ConstraintCount, 32, inputDeps);
}
public override JobHandle Apply(JobHandle inputDeps, float substepTime)
{
return inputDeps;
}
[BurstCompile]
public struct AerodynamicConstraintsBatchJob : IJobParallelFor
{
[ReadOnly] public NativeArray<int> particleIndices;
[ReadOnly] [NativeDisableParallelForRestriction] public NativeArray<float> aerodynamicCoeffs;
[ReadOnly] public NativeArray<float4> positions;
[ReadOnly] public NativeArray<float4> normals;
[ReadOnly] public NativeArray<float4> wind;
[ReadOnly] public NativeArray<float> invMasses;
[NativeDisableContainerSafetyRestriction]
public NativeArray<float4> velocities;
[ReadOnly] public float deltaTime;
public void Execute(int i)
{
int p = particleIndices[i];
float area = aerodynamicCoeffs[i * 3];
float dragCoeff = aerodynamicCoeffs[i * 3 + 1];
float liftCoeff = aerodynamicCoeffs[i * 3 + 2];
if (invMasses[p] > 0)
{
float4 relVelocity = velocities[p] - wind[p];
float rvSqrMag = math.lengthsq(relVelocity);
if (rvSqrMag < BurstMath.epsilon)
return;
float4 rvNorm = relVelocity / math.sqrt(rvSqrMag);
// calculate surface normal (always facing wind)
float4 surfNormal = normals[p] * math.sign(math.dot(normals[p], rvNorm));
// aerodynamic_factor was originally multiplied by air_density. The density is now premultiplied in lift and drag.
float aerodynamicFactor = 0.5f * rvSqrMag * area;
float attackAngle = math.dot(surfNormal,rvNorm);
float3 liftDirection = math.normalizesafe(math.cross(math.cross(surfNormal.xyz, rvNorm.xyz), rvNorm.xyz));
//drag:
velocities[p] += (-dragCoeff * rvNorm +
// lift:
liftCoeff * new float4(liftDirection.xyz,0)) *
// scale
attackAngle * math.min(aerodynamicFactor * invMasses[p] * deltaTime, 1000);
}
}
}
}
}
#endif

11
Assets/Obi/Scripts/Common/Backends/Burst/Constraints/Aerodynamics/BurstAerodynamicConstraintsBatch.cs.meta
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@@ -1,11 +0,0 @@
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