rope with gravity effect

Assets/Scenes/RopeTest.unity

@@ -1515,7 +1515,7 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 27ac133d9e10e544ba603e07122e3359, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  gravity: 0
+  gravity: 15
   solveIterations: 10
   constrainStickMinLength: 0
   start: {fileID: 1451580753}
@@ -1530,6 +1530,7 @@ MonoBehaviour:
     serializedVersion: 2
     m_Bits: 1
   pullForce: 65
+  xyGravityDampScalor: 1
   lineRenderer: {fileID: 1973576218}
   testPos: {x: 0, y: 0}
 --- !u!120 &1973576218

Assets/Scripts/Player/HealthComponent.cs

@@ -33,7 +33,6 @@ public class HealthComponent : MonoBehaviour, ISquezeDamageReceiver
 
     public void TakeSquezeDamage(float squezeDamage)
     {
-        Debug.Log($"Taking {squezeDamage}");
         if (squezeDamage < minThreshold) return;
 
         TakeDamage((int) Mathf.Round(squezeDamage * squezeDamageScalor));

Assets/Scripts/Rope/Point.cs

@@ -3,10 +3,10 @@ using UnityEngine;
 [System.Serializable]
 public class Point
 {
-    public Vector2 position, prevPosition;
+    public Vector3 position, prevPosition;
     public bool locked;
 
-    public Point(Vector2 position, bool locked = false)
+    public Point(Vector3 position, bool locked = false)
     {
         this.position = position;
         this.prevPosition = position;

Assets/Scripts/Rope/RopeSimulator.cs

@@ -47,6 +47,9 @@ public class RopeSimulator : MonoBehaviour
     [SerializeField, Range(0f, 100f)]
     float pullForce = 20f;
 
+    [SerializeField]
+    float xyGravityDampScalor = 1f;
+
     [Header("Rendering")]
     [SerializeField] LineRenderer lineRenderer;
 
@@ -75,7 +78,7 @@ public class RopeSimulator : MonoBehaviour
         builder.AddPoint(new Point(start.position, locked: true));
         for (int i = 1; i < subDivision; i++)
         {
-            Vector2 pointPos = Vector2.Lerp(start.position, end.position, (float)i / (float)subDivision);
+            Vector3 pointPos = Vector3.Lerp(start.position, end.position, (float)i / (float)subDivision);
             //Debug.Log($"pos: {pointPos}, t={i / subDivision}");
             Debug.DrawRay(pointPos, (end.position - start.position).normalized);
             builder.AddPoint(new Point(pointPos));
@@ -93,6 +96,7 @@ public class RopeSimulator : MonoBehaviour
         {
             GameObject ropeCollider = new GameObject("Rope Collider");
             ropeCollider.transform.parent = ropeCollidersParent;
+            ropeCollider.transform.position = point.position;
             ropeCollider.layer = LayerMask.NameToLayer("Rope");
 
             var colliderComponent = ropeCollider.AddComponent<CircleCollider2D>();
@@ -129,7 +133,7 @@ public class RopeSimulator : MonoBehaviour
         if (overshoot > 0)
         {
             //start.position = prevStartPos;
-            Vector2 pullDirection = (rope.points.ElementAt(1).position - new Vector2(start.position.x, start.position.y)).normalized;
+            Vector2 pullDirection = (rope.points.ElementAt(1).position - start.position).normalized;
             start.gameObject.GetComponent<Rigidbody2D>().AddForce(pullDirection * overshoot * pullForce);
         }
 
@@ -146,6 +150,15 @@ public class RopeSimulator : MonoBehaviour
         var positions = rope.points.Select(p => new Vector3(p.position.x, p.position.y, 0f)).ToArray();
         lineRenderer.positionCount = positions.Length;
         lineRenderer.SetPositions(positions);
+
+        // Handle xy dampening on z gravity
+        foreach (var point in rope.points)
+        {
+            if (point.position.z >= 0f) continue;
+
+            Vector2 newXYPos = Vector2.MoveTowards(new Vector2(point.position.x, point.position.y), new Vector2(point.prevPosition.x, point.prevPosition.y), Mathf.Abs(point.position.z * xyGravityDampScalor));
+            point.position.Set(newXYPos.x, newXYPos.y, 0f);
+        }
     }
 
     private void OnDrawGizmos()
@@ -165,9 +178,9 @@ public class RopeSimulator : MonoBehaviour
         {
             if (!p.locked)
             {
-                Vector2 positionBeforeUpdate = p.position;
+                Vector3 positionBeforeUpdate = p.position;
                 p.position += p.position - p.prevPosition;
-                p.position += Vector2.down * gravity * Time.deltaTime * Time.deltaTime;
+                p.position.z -= gravity * Time.deltaTime * Time.deltaTime;
                 p.prevPosition = positionBeforeUpdate;
             }
         }
@@ -182,8 +195,8 @@ public class RopeSimulator : MonoBehaviour
                     continue;
                 }
 
-                Vector2 stickCentre = (stick.A.position + stick.B.position) / 2;
-                Vector2 stickDir = (stick.A.position - stick.B.position).normalized;
+                Vector3 stickCentre = (stick.A.position + stick.B.position) / 2;
+                Vector3 stickDir = (stick.A.position - stick.B.position).normalized;
                 float length = (stick.A.position - stick.B.position).magnitude;
 
                 if (length > stick.desiredLength || constrainStickMinLength)
@@ -201,16 +214,17 @@ public class RopeSimulator : MonoBehaviour
         }
     }
 
-    private void TryMovePointToPosition(Point point, Vector2 position)
+    private void TryMovePointToPosition(Point point, Vector3 position)
     {
-        Vector2 moveDir = position - point.position;
+        Vector2 moveDir = new Vector2(position.x, position.y) - new Vector2(point.position.x, point.position.y);
         int stepsRequired = (int) Mathf.Ceil(moveDir.magnitude / collisionCheckDist);
         moveDir.Normalize();
-        Vector2 initialPos = point.position;
+
+        Vector2 initialPos = new Vector2(point.position.x, point.position.y);
         for (int i = 0 ; i < stepsRequired; i++)
         {
-            Vector2 newPos = Vector2.MoveTowards(point.position, position, collisionCheckDist);
-            point.position = newPos; 
+            Vector2 newPos = Vector2.MoveTowards(new Vector2(point.position.x, point.position.y), new Vector2(position.x, position.y), collisionCheckDist);
+            point.position.Set(newPos.x, newPos.y, point.position.z); 
             Collider2D collider = Physics2D.OverlapCircle(point.position, ropeRadius, staticColliderMask);
             if (collider == null) continue;
 
@@ -219,13 +233,15 @@ public class RopeSimulator : MonoBehaviour
 
             if (Vector2.Distance(initialPos, resolvedPos) < ignoreResolveThreshold) continue;
 
-            Vector2 penetrationDir = (resolvedPos - point.position).normalized;
+            Vector2 penetrationDir = (resolvedPos - new Vector2(point.position.x, point.position.y)).normalized;
             Vector2 finalPos = resolvedPos - penetrationDir * ropeRadius;
             //Debug.Log($"resolved pos: {point.position}->{finalPos}");
-            point.position = finalPos;
-            //point.prevPosition = finalPos;
+            point.position.Set(finalPos.x, finalPos.y, point.position.z);
             break;
         }
+
+        // Move z position
+        point.position.z = position.z;
     }
 
     private void HandleStaticCollidersOfPoint(Point p)
@@ -234,8 +250,9 @@ public class RopeSimulator : MonoBehaviour
         if (hitCollider == null) return;
 
         // Register the squeze force this rope particle is squezing the collider
-        Vector2 resolvedPos = hitCollider.ClosestPoint(p.position);
-        Vector2 penetration = resolvedPos - p.position;
+        Vector2 pointPos = new Vector2(p.position.x, p.position.y);
+        Vector2 resolvedPos = hitCollider.ClosestPoint(pointPos);
+        Vector2 penetration = resolvedPos - pointPos;
         Vector2 finalPos = resolvedPos - penetration.normalized * ropeRadius;
 
         float squezeForce;
@@ -244,7 +261,7 @@ public class RopeSimulator : MonoBehaviour
         else
             colliderToSquezeForce[hitCollider] = squezeForce + penetration.magnitude;
 
-        p.position = finalPos;
+        p.position.Set(finalPos.x, finalPos.y, p.position.z);
     }
 
     void CreateOrderArray()