Assets/Scripts/Terrain/BreakableTerrain.cs

   1 using UnityEngine;
   2 using UnityEngine.Tilemaps;
   3
   4 public class BreakableTerrain : MonoBehaviour
   5 {
   6     public HealthSlider m_yarnPhysics;
   7     public float m_tresholdVelocity = 40.0f;
   8
   9     private Tilemap m_tilemap;
  10     private Vector3Int m_checkOffset = new Vector3Int(-5, -5, 0);
  11     private Vector3Int m_checkSize = new Vector3Int(10, 10, 0);
  12
  13     private void Awake()
  14     {
  15         m_tilemap = GetComponent<Tilemap>();
  16         m_yarnPhysics = GameObject.FindGameObjectWithTag("YarnPhysics").GetComponent<HealthSlider>();
  17     }
  18
  19     private void OnCollisionEnter2D(Collision2D collision)
  20     {
  21         if (collision.gameObject.CompareTag("YarnPhysics"))
  22         {
  23             Rigidbody2D rigidbody = collision.gameObject.GetComponent<Rigidbody2D>();
  24             float velocityMagnitude = Vector3.Magnitude(m_yarnPhysics.CurrentYarnVelocity);
  25
  26             if (velocityMagnitude >= m_tresholdVelocity)
  27             {
  28                 ContactPoint2D[] contact = new ContactPoint2D[1];
  29                 GetComponent<CompositeCollider2D>().GetContacts(contact);
  30
  31                 Vector3Int tilePosition = m_tilemap.WorldToCell(new Vector3(
  32                     contact[0].point.x,
  33                     contact[0].point.y,
  34                     0.0f));
  35
  36                 // Pick the tile which collided with the yarn as the center of a 10x10 bounding box
  37                 BoundsInt checkBounds = new BoundsInt(tilePosition + m_checkOffset, m_checkSize);
  38
  39                 for (int x = checkBounds.xMin; x != checkBounds.xMax; ++x)
  40                 {
  41                     for (int y = checkBounds.yMin; y != checkBounds.yMax; ++y)
  42                     {
  43                         Vector3Int tilePos = new Vector3Int(x, y, 0);
  44                         TileBase tile = m_tilemap.GetTile(tilePos);
  45                         if (tile != null)
  46                         {
  47                             m_tilemap.SetTile(tilePos, null);
  48                         }
  49                     }
  50                 }
  51
  52                 // Restore the yarn's original velocity pre-collision
  53                 rigidbody.velocity = m_yarnPhysics.CurrentYarnVelocity;
  54             }
  55         }
  56     }
  57 }