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去掉obi，使用自写绳索

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This commit is contained in:
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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122
Assets/Obi/Scripts/Common/Backends/Burst/Solver/UpdateNormalsJob.cs
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#if (OBI_BURST && OBI_MATHEMATICS && OBI_COLLECTIONS)
using Unity.Jobs;
using Unity.Collections;
using Unity.Mathematics;
using Unity.Burst;
using UnityEngine;
namespace Obi
{
[BurstCompile]
struct ResetNormals : IJobParallelFor
{
[ReadOnly] public NativeArray<int> phases;
public NativeArray<float4> normals;
[WriteOnly] public NativeArray<float4> tangents;
public void Execute(int i)
{
// leave fluid and softbody normals intact.
if ((phases[i] & (int)ObiUtils.ParticleFlags.Fluid) == 0 && normals[i].w >= 0)
{
normals[i] = float4.zero;
tangents[i] = float4.zero;
}
}
}
[BurstCompile]
unsafe struct UpdateTriangleNormalsJob : IJobParallelFor
{
[ReadOnly] public NativeArray<int> deformableTriangles;
[ReadOnly] public NativeArray<float2> deformableTriangleUVs;
[ReadOnly] public NativeArray<float4> renderPositions;
[NativeDisableParallelForRestriction] public NativeArray<float4> normals;
[NativeDisableParallelForRestriction] public NativeArray<float4> tangents;
public void Execute(int i)
{
int p1 = deformableTriangles[i*3];
int p2 = deformableTriangles[i*3 + 1];
int p3 = deformableTriangles[i*3 + 2];
float3 m1 = (renderPositions[p2] - renderPositions[p1]).xyz;
float3 m2 = (renderPositions[p3] - renderPositions[p1]).xyz;
float2 s = deformableTriangleUVs[i * 3 + 1] - deformableTriangleUVs[i * 3];
float2 t = deformableTriangleUVs[i * 3 + 2] - deformableTriangleUVs[i * 3];
float4 normal = new float4(math.cross(m1, m2), 0);
float4 tangent = float4.zero;
float area = s.x * t.y - t.x * s.y;
if (math.abs(area) > BurstMath.epsilon)
{
tangent = new float4(t.y * m1.x - s.y * m2.x,
t.y * m1.y - s.y * m2.y,
t.y * m1.z - s.y * m2.z, 0) / area;
}
BurstMath.AtomicAdd(normals, p1, normal);
BurstMath.AtomicAdd(normals, p2, normal);
BurstMath.AtomicAdd(normals, p3, normal);
BurstMath.AtomicAdd(tangents, p1, tangent);
BurstMath.AtomicAdd(tangents, p2, tangent);
BurstMath.AtomicAdd(tangents, p3, tangent);
}
}
[BurstCompile]
unsafe struct UpdateEdgeNormalsJob : IJobParallelFor
{
[ReadOnly] public NativeArray<int> deformableEdges;
[ReadOnly] public NativeArray<float4> velocities;
[ReadOnly] public NativeArray<float4> wind;
[ReadOnly] public NativeArray<float4> renderPositions;
[NativeDisableParallelForRestriction] public NativeArray<float4> normals;
public void Execute(int i)
{
int p1 = deformableEdges[i * 2];
int p2 = deformableEdges[i * 2 + 1];
float4 edge = renderPositions[p2] - renderPositions[p1];
float4 avgWind = (velocities[p1] + velocities[p2]) * 0.5f - (wind[p1] + wind[p2]) * 0.5f;
float4 normal = avgWind - math.projectsafe(avgWind, edge);
BurstMath.AtomicAdd(normals, p1, normal);
BurstMath.AtomicAdd(normals, p2, normal);
}
}
[BurstCompile]
struct RenderableOrientationFromNormals : IJobParallelFor
{
[ReadOnly] public NativeArray<int> phases;
public NativeArray<float4> normals;
public NativeArray<float4> tangents;
[WriteOnly] public NativeArray<quaternion> renderableOrientations;
public void Execute(int i)
{
if (((phases[i] & (int)ObiUtils.ParticleFlags.Fluid) == 0 && normals[i].w >= 0) && // not fluid or softbody (no SDF stored)
math.lengthsq(normals[i]) > BurstMath.epsilon &&
math.lengthsq(tangents[i]) > BurstMath.epsilon)
{
normals[i] = math.normalizesafe(normals[i]);
tangents[i] = math.normalizesafe(tangents[i]);
// particle orientation from normal/tangent:
renderableOrientations[i] = quaternion.LookRotation(normals[i].xyz, tangents[i].xyz);
}
}
}
}
#endif