103 lines
3.0 KiB
C#
103 lines
3.0 KiB
C#
using System.Collections.Generic;
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using UnityEngine;
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public class ShieldController : MonoBehaviour
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{
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public float followSpeed = 20f;
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public float pushForce = 10f;
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public LayerMask pushableLayers;
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private Rigidbody2D rb;
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private Camera mainCam;
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private HashSet<GameObject> hitEnemies = new HashSet<GameObject>();
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void Start()
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{
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rb = GetComponent<Rigidbody2D>();
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mainCam = Camera.main;
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}
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void Update()
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{
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if (BalloonGameManager.IsGameOver) return;
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HandleMovement();
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DestroyOffscreenEnemies();
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}
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void HandleMovement()
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{
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if (Input.GetMouseButton(0))
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{
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Vector2 touchPosition = mainCam.ScreenToWorldPoint(Input.mousePosition);
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Vector2 direction = (touchPosition - rb.position);
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rb.velocity = direction * followSpeed;
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}
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else
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{
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rb.velocity = Vector2.zero;
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}
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// Clamp shield inside the camera
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Vector3 viewPos = mainCam.WorldToViewportPoint(transform.position);
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viewPos.x = Mathf.Clamp01(viewPos.x);
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viewPos.y = Mathf.Clamp01(viewPos.y);
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transform.position = mainCam.ViewportToWorldPoint(viewPos);
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}
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private void OnCollisionEnter2D(Collision2D collision)
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{
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if (((1 << collision.gameObject.layer) & pushableLayers) != 0)
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{
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Rigidbody2D otherRb = collision.rigidbody;
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if (otherRb != null && otherRb != rb)
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{
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Vector2 forceDir = collision.transform.position - transform.position;
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forceDir.Normalize();
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otherRb.AddForce(forceDir * pushForce, ForceMode2D.Impulse);
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// Add to list of hit enemies
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if (!hitEnemies.Contains(collision.gameObject))
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{
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hitEnemies.Add(collision.gameObject);
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}
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}
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}
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}
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void DestroyOffscreenEnemies()
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{
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float buffer = 1f; // World units to extend camera bounds (adjust as needed)
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List<GameObject> toRemove = new List<GameObject>();
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foreach (GameObject enemy in hitEnemies)
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{
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if (enemy == null) continue;
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Vector3 enemyPos = enemy.transform.position;
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Vector3 camPos = mainCam.transform.position;
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float camHeight = 2f * mainCam.orthographicSize;
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float camWidth = camHeight * mainCam.aspect;
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float left = camPos.x - camWidth / 2f - buffer;
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float right = camPos.x + camWidth / 2f + buffer;
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float bottom = camPos.y - camHeight / 2f - buffer;
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float top = camPos.y + camHeight / 2f + buffer;
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if (enemyPos.x < left || enemyPos.x > right ||
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enemyPos.y < bottom || enemyPos.y > top)
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{
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Destroy(enemy);
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toRemove.Add(enemy);
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}
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}
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foreach (GameObject e in toRemove)
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{
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hitEnemies.Remove(e);
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}
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}
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}
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