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Assets/Scripts/PlaceableStreetObject.cs

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+using UnityEngine;
+
+public class PlaceableStreetObject : MonoBehaviour
+{
+    public GameObject childObject;
+    public bool placeable = true;
+    TrafficNode snappingNode;
+
+    private void Update()
+    {
+        UpdateSnappingNode();
+        ScaleOnMousePosition();
+        RotateToMousePosition();
+        placeable = childObject.GetComponent<PlaceableStreetObjectChild>().placeable;
+    }
+
+    float AngleBetweenTwoPoints(Vector3 a, Vector3 b)
+    {
+        return Mathf.Atan2(a.y - b.y, a.x - b.x) * Mathf.Rad2Deg;
+    }
+
+    private void UpdateSnappingNode()
+    {
+        Vector3 mousePosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
+        RaycastHit2D[] hits = Physics2D.RaycastAll(mousePosition, Vector2.zero);
+
+
+        // Snapping
+        TrafficNode foundNode = null;
+        foreach (RaycastHit2D hit in hits)
+        {
+            if (hit.collider != null)
+            {
+                if (hit.collider.gameObject.tag == "TrafficNode")
+                {
+                    foundNode = hit.collider.gameObject.GetComponent<TrafficNode>();
+                }
+            }
+        }
+
+        if (snappingNode != null)
+        {
+            snappingNode.gizmoSphereColor = Color.green;
+        }
+
+        snappingNode = foundNode;
+
+        if (snappingNode != null)
+        {
+            snappingNode.gizmoSphereColor = Color.red;
+        }
+
+        childObject.GetComponent<PlaceableStreetObjectChild>().snappingNode = snappingNode;
+    }
+
+
+    Vector3 GetEndPosition()
+    {
+        PlaceableStreetObjectChild child = childObject.GetComponent<PlaceableStreetObjectChild>();
+        Vector3 mousePosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
+
+        Vector3 endPosition = mousePosition;
+
+
+        // Snapping
+        if (snappingNode != null)
+        {
+            endPosition.x = snappingNode.gameObject.transform.position.x;
+            endPosition.y = snappingNode.gameObject.transform.position.y;
+        }
+
+        endPosition.z = 0;
+        return endPosition;
+    }
+
+    void RotateToMousePosition()
+    {
+        Vector3 endPosition = GetEndPosition();
+        float angle = AngleBetweenTwoPoints(transform.position, endPosition);
+        transform.rotation = Quaternion.Euler(new Vector3(0f, 0f, angle));
+    }
+    void ScaleOnMousePosition()
+    {
+        Vector3 endPosition = GetEndPosition();
+        transform.localScale = new Vector3(-Vector3.Distance(endPosition, transform.position), 1, 1);
+    }
+
+
+}