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Assets/Obi/Scripts/Common/DataStructures/EmitPoint.cs

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+using UnityEngine;
+using System;
+
+namespace Obi
+{
+    [Serializable]
+    public struct EmitPoint
+    {
+        public Vector4 position;
+        public Vector4 direction;
+        public Vector4 velocity;
+        public Color color;
+
+        public EmitPoint(Vector3 position, Vector3 direction)
+        {
+            this.position = position;
+            this.direction = direction;
+            this.velocity = Vector4.zero;
+            this.color = Color.white;
+        }
+
+        public EmitPoint(Vector3 position, Vector3 direction, Color color)
+        {
+            this.position = position;
+            this.direction = direction;
+            this.velocity = Vector4.zero;
+            this.color = color;
+        }
+
+        public EmitPoint GetTransformed(Matrix4x4 transform, Matrix4x4 prevTransform, Color multiplyColor, float deltaTime)
+        {
+            var ep = new EmitPoint(transform.MultiplyPoint3x4(position),
+                                   transform.MultiplyVector(direction),
+                                   color * multiplyColor);
+
+            ep.velocity = deltaTime > 0 ? ((Vector3)ep.position - prevTransform.MultiplyPoint3x4(position)) / deltaTime : Vector3.zero;
+            return ep;
+        }
+    }
+}