4 files changed, 192 insertions, 0 deletions
diff --git a/Assets/Scripts/RopePrototype.cs b/Assets/Scripts/RopePrototype.cs
new file mode 100644
index 0000000..b2f37ab
--- /dev/null
+++ b/Assets/Scripts/RopePrototype.cs
@@ -0,0 +1,133 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class RopePrototype : MonoBehaviour
+{
+    public int constraintIterations = 50;
+    public float gravityMultiplier = 1.0f;
+    public float lineWidth = 0.1f;
+    public float ropeSegmentLength = 0.25f;
+    public int segmentCount = 35;
+
+    LineRenderer lr;
+    DistanceJoint2D dj;
+    GameObject player;
+    List<RopeSegment> ropeSegments = new List<RopeSegment>();
+    Vector3[] ropePositions;
+    bool ropeCreated = false;
+
+    // Start is called before the first frame update
+    void Start()
+    {
+        player = GameObject.FindGameObjectWithTag("Player");
+        dj = GetComponent<DistanceJoint2D>();
+        lr = GetComponent<LineRenderer>();
+        lr.startWidth = lineWidth;
+        lr.endWidth = lineWidth;
+        ropePositions = new Vector3[segmentCount];
+        lr.positionCount = segmentCount;
+        Vector2 ropeLoc = transform.position;
+
+        for (int i = 0; i < segmentCount; i++)
+        {
+            ropeSegments.Add(new RopeSegment(ropeLoc));
+            ropeLoc.y -= ropeSegmentLength;
+        }
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        if (!ropeCreated)
+        {
+            CreateRope();
+            ropeCreated = true;
+        }
+        RenderLine();
+        Simulate();
+    }
+
+    void RenderLine()
+    {
+        for(int i = 0; i < ropePositions.Length; i++)
+        {
+            ropePositions[i] = ropeSegments[i].posNow;
+        }
+        lr.SetPositions(ropePositions);
+    }
+
+    void CreateRope()
+    {
+        dj.connectedBody = player.GetComponent<Rigidbody2D>();
+        dj.maxDistanceOnly = true;
+        dj.distance = Vector2.Distance(player.transform.position, transform.position);
+    }
+
+    void Simulate()
+    {
+        Vector2 gravityForce = new Vector2(0f, -gravityMultiplier);
+
+        for(int i = 0; i < ropeSegments.Count; i++)
+        {
+            RopeSegment segment = ropeSegments[i];
+            Vector2 velocity = segment.posNow - segment.posOld;
+            segment.posOld = segment.posNow;
+            segment.posNow += velocity;
+            segment.posNow += gravityForce * Time.deltaTime;
+            ropeSegments[i] = segment;
+        }
+
+        for(int i = 0; i < constraintIterations; i++)
+        {
+            ApplyContraint();
+        }
+    }
+
+    void ApplyContraint()
+    {
+        RopeSegment endSegment1 = ropeSegments[0];
+        endSegment1.posNow = transform.position;
+        ropeSegments[0] = endSegment1;
+
+        RopeSegment endSegment2 = ropeSegments[ropeSegments.Count - 1];
+        endSegment2.posNow = player.transform.position;
+        ropeSegments[ropeSegments.Count - 1] = endSegment2;
+
+        for (int i = 0; i < ropeSegments.Count-1; i++)
+        {
+            RopeSegment segment1 = ropeSegments[i];
+            RopeSegment segment2 = ropeSegments[i + 1];
+
+            float distance = (segment1.posNow - segment2.posNow).magnitude;
+            float error = distance - ropeSegmentLength;
+            Vector2 normalChange = (segment1.posNow - segment2.posNow).normalized;
+            Vector2 change = normalChange * error;
+
+            if(i != 0)
+            {
+                segment1.posNow -= change * 0.5f;
+                ropeSegments[i] = segment1;
+                segment2.posNow += change * 0.5f;
+                ropeSegments[i + 1] = segment2;
+            }
+            else
+            {
+                segment2.posNow += change;
+                ropeSegments[i + 1] = segment2;
+            }
+        }
+    }
+
+    public struct RopeSegment
+    {
+        public Vector2 posNow;
+        public Vector2 posOld;
+
+        public RopeSegment(Vector2 pos)
+        {
+            this.posNow = pos;
+            this.posOld = pos;
+        }
+    }
+}
diff --git a/Assets/Scripts/RopePrototype.cs.meta b/Assets/Scripts/RopePrototype.cs.meta
new file mode 100644
index 0000000..4ce3825
--- /dev/null
+++ b/Assets/Scripts/RopePrototype.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: f828efbe27e65524c9d7e0d87b6a6f0f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/Scripts/RopeThrowPrototype.cs b/Assets/Scripts/RopeThrowPrototype.cs
new file mode 100644
index 0000000..d828cca
--- /dev/null
+++ b/Assets/Scripts/RopeThrowPrototype.cs
@@ -0,0 +1,37 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class RopeThrowPrototype : MonoBehaviour
+{
+    public GameObject hook;
+    public bool ropeExists = false;
+
+    GameObject currentHook;
+
+    // Start is called before the first frame update
+    void Start()
+    {
+
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        if (Input.GetMouseButtonDown(0))
+        {
+            if (!ropeExists)
+            {
+                Vector2 clickLocation = Camera.main.ScreenToWorldPoint(Input.mousePosition);
+
+                currentHook = (GameObject)Instantiate(hook, clickLocation, Quaternion.identity);
+                ropeExists = true;
+            }
+            else
+            {
+                Destroy(currentHook);
+                ropeExists = false;
+            }
+        }
+    }
+}
diff --git a/Assets/Scripts/RopeThrowPrototype.cs.meta b/Assets/Scripts/RopeThrowPrototype.cs.meta
new file mode 100644
index 0000000..3fccef5
--- /dev/null
+++ b/Assets/Scripts/RopeThrowPrototype.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 4ddff3a67736d7a42a22a7590fc5b028
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: