Initial commit

Assets/Low Poly Animated People/- Scripts/AIScripts/SurfaceRotation.cs

@@ -0,0 +1,65 @@
+using UnityEngine;
+
+namespace PolyPerfect
+{
+  public class SurfaceRotation : MonoBehaviour
+  {
+    private string terrainLayer = "Terrain";
+    private int layer;
+    private bool rotate = true;
+    private Quaternion targetRotation;
+    private float rotationSpeed = 2f;
+
+    private void Awake()
+    {
+      layer = LayerMask.GetMask(terrainLayer);
+    }
+
+    private void Start()
+    {
+      RaycastHit hit;
+      Vector3 direction = transform.parent.TransformDirection(Vector3.down);
+
+      if (Physics.Raycast(transform.parent.position, direction, out hit, 50f, layer))
+      {
+        float distance = hit.distance;
+        Quaternion surfaceRotation = Quaternion.FromToRotation(Vector3.up, hit.normal);
+        transform.rotation = surfaceRotation * transform.parent.rotation;
+      }
+    }
+
+    private void Update()
+    {
+      if (!rotate)
+        return;
+
+      RaycastHit hit;
+      Vector3 direction = transform.parent.TransformDirection(Vector3.down);
+
+      if (Physics.Raycast(transform.parent.position, direction, out hit, 50f, layer))
+      {
+        float distance = hit.distance;
+        Quaternion surfaceRotation = Quaternion.FromToRotation(Vector3.up, hit.normal);
+        targetRotation = surfaceRotation * transform.parent.rotation;
+      }
+
+      transform.rotation = Quaternion.Lerp(transform.rotation, targetRotation, Time.deltaTime * rotationSpeed);
+    }
+
+    public void SetRotationSpeed(float speed)
+    {
+      if (speed > 0f)
+        rotationSpeed = speed;
+    }
+
+    private void OnBecameVisible()
+    {
+      rotate = true;
+    }
+
+    private void OnBecameInvisible()
+    {
+      rotate = false;
+    }
+  }
+}