添加插件

Assets/Obi/Scripts/Common/Backends/Burst/DataStructures/FluidInteraction.cs

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+#if (OBI_BURST && OBI_MATHEMATICS && OBI_COLLECTIONS)
+using System;
+using Unity.Mathematics;
+
+namespace Obi
+{
+    public struct FluidInteraction : IConstraint
+    {
+        public float4 gradient;
+        public float avgKernel;
+        public float avgGradient;
+        public int particleA;
+        public int particleB;
+
+        public int GetParticleCount() { return 2; }
+        public int GetParticle(int index) { return index == 0 ? particleA : particleB; }
+    }
+}
+#endif