now handles slopes

Author: Zeyu-Li

Assets/Scripts/movement.cs

@@ -22,6 +22,11 @@ public class movement : MonoBehaviour
     // jump
     public float jump = 1f;
 
+    // slope
+    public bool isSliding = false;
+    public float slopeLimit = 35f;
+    private Vector3 slopeParallel;
+
     // Update is called once per frame
     void Update()
     {
@@ -39,9 +44,44 @@ void Update()
 
         controller.Move(move*movementSpeed*Time.deltaTime);
 
+        // slopes, modified from https://answers.unity.com/questions/1502223/sliding-down-a-slope-with-a-character-controller.html
+        if (isGrounded) {
+            RaycastHit hit;
+            Physics.Raycast(transform.position, Vector3.down, out hit);
+            // Saving the normal
+            Vector3 n = hit.normal;
+
+            // Crossing my normal with the player's up vector (if your player rotates I guess you can just use Vector3.up to create a vector parallel to the ground
+            Vector3 groundParallel = Vector3.Cross(transform.up, n);
+
+            // Crossing the vector we made before with the initial normal gives us a vector that is parallel to the slope and always pointing down
+            slopeParallel = Vector3.Cross(groundParallel, n);
+            Debug.DrawRay(hit.point, slopeParallel * 10, Color.green);
+
+            // Just the current angle we're standing on
+            float currentSlope = Mathf.Round(Vector3.Angle(hit.normal, transform.up));
+
+            // If the slope is on a slope too steep and the player is Grounded the player is pushed down the slope.
+            if (currentSlope >= slopeLimit) {
+                isSliding = true;
+            }
+            // If the player is standing on a slope that isn't too steep, is grounded, as is not sliding anymore we start a function to count time
+            else if (currentSlope < slopeLimit && isSliding) {
+                isSliding = false;
+            }
+        }
+
+        if (isSliding) {
+            controller.Move(slopeParallel.normalized / 2 * Time.deltaTime);
+        }
+
         // jump
         if (Input.GetButtonDown("Jump") && isGrounded) {
             velocity.y = Mathf.Sqrt(jump * -2f * gravity);
+            if (isSliding) {
+                // cut jump in halve
+                velocity.y /= 2;
+            }
         }
 
         velocity.y += gravity*Time.deltaTime;