修改水

Assets/Obi/Resources/Compute/StretchShearConstraints.compute

@@ -1,86 +0,0 @@
-#pragma kernel Project
-#pragma kernel Apply
-
-#include "MathUtils.cginc"
-#include "AtomicDeltas.cginc"
-
-StructuredBuffer<int> particleIndices;
-StructuredBuffer<int> orientationIndices;
-StructuredBuffer<float> restLengths;
-StructuredBuffer<quaternion> restOrientations;
-StructuredBuffer<float3> stiffnesses;
-RWStructuredBuffer<float3> lambdas;
-
-RWStructuredBuffer<float4> positions;
-RWStructuredBuffer<quaternion> orientations;
-StructuredBuffer<float> invMasses;
-StructuredBuffer<float> invRotationalMasses;
-
-// Variables set from the CPU
-uint activeConstraintCount;
-float deltaTime;
-float sorFactor;
-
-[numthreads(128, 1, 1)]
-void Project (uint3 id : SV_DispatchThreadID) 
-{
-    unsigned int i = id.x;
-
-    if (i >= activeConstraintCount) return;
-
-    int p1 = particleIndices[i * 2];
-    int p2 = particleIndices[i * 2 + 1];
-    int q = orientationIndices[i];
-
-    float w1 = invMasses[p1];
-    float w2 = invMasses[p2];
-
-    // calculate time adjusted compliance
-    float3 compliances = stiffnesses[i] / (deltaTime * deltaTime);
-
-    float3 e = rotate_vector(restOrientations[i], float3(0, 0, 1));
-    quaternion basis = qmul(orientations[q],restOrientations[i]);
-
-    // calculate rod vector in local element space:
-    float3 gamma = rotate_vector(q_conj(basis), (positions[p2] - positions[p1]).xyz) / (restLengths[i] + EPSILON);
-
-    // subtract third director vector (0,0,1):
-    gamma[2] -= 1;
-    
-    float W = (w1 + w2) / (restLengths[i] + EPSILON) + invRotationalMasses[q] * 4.0f * restLengths[i];
-    float3 dlambda = (gamma - compliances * lambdas[i]) / (W + compliances + EPSILON);
-    lambdas[i] += dlambda;
-
-    // convert lambda delta lambda back to world space:
-    dlambda = rotate_vector(basis, dlambda);
-
-    float4 delta1 = float4(dlambda, 0) * w1;
-    float4 delta2 = -float4(dlambda, 0) * w2;
-
-    quaternion e_3 = quaternion(e.x,e.y,e.z,0);
-    quaternion q_e_3_bar = qmul(orientations[q],q_conj(e_3));
-    
-    // calculate rotation delta:
-    quaternion rotDelta = qmul(quaternion(dlambda[0], dlambda[1], dlambda[2], 0.0f),q_e_3_bar);
-    rotDelta *= 2.0f * invRotationalMasses[q] * restLengths[i];
-
-    AddPositionDelta(p1, delta1);
-    AddPositionDelta(p2, delta2); 
-    AddOrientationDelta(q, rotDelta);
-}
-
-[numthreads(128, 1, 1)]
-void Apply (uint3 id : SV_DispatchThreadID) 
-{
-    unsigned int i = id.x;
-   
-    if (i >= activeConstraintCount) return;
-
-    int p1 = particleIndices[i * 2];
-    int p2 = particleIndices[i * 2 + 1];
-    int q = orientationIndices[i];
-
-    ApplyPositionDelta(positions, p1, sorFactor);
-    ApplyPositionDelta(positions, p2, sorFactor);
-    ApplyOrientationDelta(orientations, q, sorFactor);
-}