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1 files changed, 51 insertions, 0 deletions

diff --git a/Samples/AnimTest/Animation/Path.cs b/Samples/AnimTest/Animation/Path.cs
new file mode 100644
index 00000000..1f04e090
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+++ b/Samples/AnimTest/Animation/Path.cs
@@ -0,0 +1,51 @@
+// Copyright (c) 2015-2021  Jean-Philippe Bruyère <jp_bruyere@hotmail.com>
+//
+// This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
+using System.Numerics;
+
+namespace vke {
+    public class Path 
+	{
+		public Vector3 Start;
+		public Vector3 End;
+
+		float length;
+		Vector3 vDir;
+
+		public Path(Vector3 startPos, Vector3 endPos){
+			Start = startPos;
+			End = endPos;
+			initialComputations ();
+		}
+		protected void initialComputations(){
+			Vector3 vPath = End - Start;
+			vDir = Vector3.Normalize (vPath);
+			length = vPath.Length();
+		}
+		/// <summary>
+		/// Get single step on the path
+		/// </summary>
+		/// <returns>return position on the path</returns>
+		/// <param name="pos">Position expressed as percentage of total length</param>
+		public virtual Vector3 GetStep(float pos){
+			return Start + vDir * length * pos;
+		}
+
+		public static Vector3 CalculateBezierPoint(float t, Vector3 p0, Vector3 p1, Vector3 p2, Vector3 p3)
+		{
+			float u = 1 - t;
+			float tt = t * t;
+			float uu = u * u;
+			float uuu = uu * u;
+			float ttt = tt * t;
+
+			Vector3 p = uuu * p0;
+			p += 3 * uu * t * p1;
+			p += 3 * u * tt * p2;
+			p += ttt * p3;
+
+			return p;
+		}
+    }
+
+}