Added FinalIK

Assets/Plugins/RootMotion/FinalIK/_DEMOS/Aim IK/Scripts/TerrainOffset.cs

@@ -0,0 +1,54 @@
+using UnityEngine;
+using System.Collections;
+using RootMotion.FinalIK;
+
+namespace RootMotion.Demos {
+
+	/// <summary>
+	/// Raycasting to the ground to redirect upper-body animation based on ground topography.
+	/// </summary>
+	public class TerrainOffset : MonoBehaviour {
+		
+		public AimIK aimIK; // Reference to the AimIK component
+		public Vector3 raycastOffset = new Vector3(0f, 2f, 1.5f); // Offset from the character, in local space, to raycast from
+		public LayerMask raycastLayers; // The layers we want to raycast at
+		public float min = -2f, max = 2f; // Min and max for the offset
+		public float lerpSpeed = 10f; // The speed of lerping the IKPosition to make things nice and smooth
+
+		private RaycastHit hit;
+		private Vector3 offset;
+
+		void LateUpdate() {
+			// Find the raycastOffset in world space
+			Vector3 worldOffset = transform.rotation * raycastOffset;
+
+			// Find how much higher is the ground at worldOffset relative to the character position.
+			Vector3 realOffset = GetGroundHeightOffset(transform.position + worldOffset);
+
+			// Smoothly lerp the offset value so it would not jump on sudden raycast changes
+			offset = Vector3.Lerp(offset, realOffset, Time.deltaTime * lerpSpeed);
+
+			// The default offset point at the character's height
+			Vector3 zeroOffsetPosition = transform.position + new Vector3(worldOffset.x, 0f, worldOffset.z);
+
+			// Make the Aim Transform look at the default offset point (So when we are on planar ground there will be nothing for Aim IK to do)
+			aimIK.solver.transform.LookAt(zeroOffsetPosition);
+
+			// Make Aim IK bend the spine by the offset.
+			aimIK.solver.IKPosition = zeroOffsetPosition + offset;
+		}
+
+		private Vector3 GetGroundHeightOffset(Vector3 worldPosition) {
+			// Visualize the raycast
+			Debug.DrawRay(worldPosition, Vector3.down * raycastOffset.y * 2f, Color.green);
+
+			// Raycast to find how much higher is the ground at worldPosition relative to the character.
+			if (Physics.Raycast(worldPosition, Vector3.down, out hit, raycastOffset.y * 2f)) {
+				return Mathf.Clamp(hit.point.y - transform.position.y, min, max) * Vector3.up;
+			}
+
+			// Raycast found nothing so return zero
+			return Vector3.zero;
+		}
+	}
+}