重新导入obi

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

@@ -0,0 +1,51 @@
+#if (OBI_BURST && OBI_MATHEMATICS && OBI_COLLECTIONS)
+using UnityEngine;
+using Unity.Jobs;
+using Unity.Collections;
+using Unity.Mathematics;
+using Unity.Burst;
+using System;
+using System.Collections;
+
+namespace Obi
+{
+    [BurstCompile]
+    struct UpdatePositionsJob : IJobParallelFor
+    {
+        [ReadOnly] public NativeArray<int> activeParticles;
+
+        // linear/position properties:
+        [NativeDisableParallelForRestriction] public NativeArray<float4> positions;
+        [ReadOnly] public NativeArray<float4> previousPositions;
+        [NativeDisableParallelForRestriction] public NativeArray<float4> velocities;
+
+        // angular/orientation properties:
+        [NativeDisableParallelForRestriction] public NativeArray<quaternion> orientations;
+        [ReadOnly] public NativeArray<quaternion> previousOrientations;
+        [NativeDisableParallelForRestriction] public NativeArray<float4> angularVelocities;
+
+        [ReadOnly] public float velocityScale;
+        [ReadOnly] public float sleepThreshold;
+
+        // The code actually running on the job
+        public void Execute(int index)
+        {
+            int i = activeParticles[index];
+
+            // damp velocities:
+            velocities[i] *= velocityScale;
+            angularVelocities[i] *= velocityScale;
+
+            // if the kinetic energy is below the sleep threshold, keep the particle at its previous position.
+            if (math.lengthsq(velocities[i]) * 0.5f + math.lengthsq(angularVelocities[i]) * 0.5f <= sleepThreshold)
+            {
+                positions[i] = previousPositions[i];
+                orientations[i] = previousOrientations[i];
+                velocities[i] = float4.zero;
+                angularVelocities[i] = float4.zero;
+            }
+
+        }
+    }
+}
+#endif