基础内容

必要插件安装
缓动曲线和动画基础
ElementFolder，Track与其次级模块，PathNode重构

Assets/Plugins/Dreamteck/Utilities/LinearAlgebraUtility.cs

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+using UnityEngine;
+using System.Collections;
+using System.IO;
+
+namespace Dreamteck
+{
+    public static class LinearAlgebraUtility
+    {
+        public enum Axis
+        {
+            X = 0,
+            Y = 1,
+            Z = 2
+        }
+
+        public static Vector3 ProjectOnLine(Vector3 fromPoint, Vector3 toPoint, Vector3 project)
+        {
+            Vector3 projectedPoint = Vector3.Project((project - fromPoint), (toPoint - fromPoint)) + fromPoint;
+            Vector3 dir = toPoint - fromPoint;
+            Vector3 projectedDir = projectedPoint - fromPoint;
+            float dot = Vector3.Dot(projectedDir, dir);
+            if(dot > 0f)
+            {
+                if(projectedDir.sqrMagnitude <= dir.sqrMagnitude) return projectedPoint;
+                else return toPoint;
+            } else return fromPoint;
+        }
+
+        public static float InverseLerp(Vector3 a, Vector3 b, Vector3 value)
+        {
+            Vector3 ab = b - a;
+            Vector3 av = value - a;
+            return Vector3.Dot(av, ab) / Vector3.Dot(ab, ab);
+        }
+
+        public static float DistanceOnSphere(Vector3 from, Vector3 to, float radius)
+        {
+            float distance = 0;
+            
+            if (from == to)
+            {
+                distance = 0;
+            }
+            else if (from == -to)
+            {
+                distance = Mathf.PI * radius;
+            }
+            else
+            {
+                distance = Mathf.Sqrt(2) * radius * Mathf.Sqrt(1.0f - Vector3.Dot(from, to));
+            }
+
+            return distance;
+        }
+
+        public static Vector3 FlattenVector(Vector3 input, Axis axis, float flatValue = 0f)
+        {
+            switch (axis)
+            {
+                case Axis.X: input.x = flatValue; break;
+                case Axis.Y: input.y = flatValue; break;
+                case Axis.Z: input.z = flatValue; break;
+            }
+            return input;
+        }
+    }
+}