修改水

Assets/Obi/Scripts/Common/Backends/Burst/Solver/UpdatePositionsJob.cs

@@ -26,42 +26,25 @@ namespace Obi
 
         [ReadOnly] public float velocityScale;
         [ReadOnly] public float sleepThreshold;
-        [ReadOnly] public float maxVelocity;
-        [ReadOnly] public float maxAngularVelocity;
 
         // The code actually running on the job
         public void Execute(int index)
         {
             int i = activeParticles[index];
 
-            float4 velocity = velocities[i];
-            float4 angVelocity = angularVelocities[i];
-
             // damp velocities:
-            velocity *= velocityScale;
-            angVelocity.xyz *= velocityScale;
-
-            // clamp velocities:
-            float velMagnitude = math.length(velocity);
-            float angularVelMagnitude = math.length(angVelocity.xyz);
-
-            if (velMagnitude > BurstMath.epsilon)
-                velocity *= math.min(maxVelocity, velMagnitude) / velMagnitude;
-
-            if (angularVelMagnitude > BurstMath.epsilon)
-                angVelocity.xyz *= math.min(maxAngularVelocity, angularVelMagnitude) / angularVelMagnitude;
+            velocities[i] *= velocityScale;
+            angularVelocities[i] *= velocityScale;
 
             // if the kinetic energy is below the sleep threshold, keep the particle at its previous position.
-            if (velMagnitude * velMagnitude * 0.5f + angularVelMagnitude * angularVelMagnitude * 0.5f <= sleepThreshold)
+            if (math.lengthsq(velocities[i]) * 0.5f + math.lengthsq(angularVelocities[i]) * 0.5f <= sleepThreshold)
             {
                 positions[i] = previousPositions[i];
                 orientations[i] = previousOrientations[i];
-                velocity = float4.zero;
-                angVelocity.xyz = float3.zero;
+                velocities[i] = float4.zero;
+                angularVelocities[i] = float4.zero;
             }
 
-            velocities[i] = velocity;
-            angularVelocities[i] = angVelocity;
         }
     }
 }