66 lines
2.3 KiB
C#
66 lines
2.3 KiB
C#
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using UnityEngine;
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using System.Collections;
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using System.Collections.Generic;
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public class ExplosionForce : MonoBehaviour {
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public float force = 50;
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public float radius = 5;
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public float upliftModifer = 5;
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/// <summary>
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/// create an explosion force
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/// </summary>
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/// <param name="position">location of the explosion</param>
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public void doExplosion(Vector3 position){
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transform.localPosition = position;
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StartCoroutine(waitAndExplode());
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}
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/// <summary>
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/// exerts an explosion force on all rigidbodies within the given radius
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/// </summary>
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/// <returns></returns>
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private IEnumerator waitAndExplode(){
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yield return new WaitForFixedUpdate();
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Collider2D[] colliders = Physics2D.OverlapCircleAll(transform.position,radius);
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foreach(Collider2D coll in colliders){
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if(coll.GetComponent<Rigidbody2D>()&&coll.name!="hero"){
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//Roman Update
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//使其仅影响碎片
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if(coll.gameObject.layer == LayerMask.NameToLayer("Fragment"))
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//
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AddExplosionForce(coll.GetComponent<Rigidbody2D>(), force, transform.position, radius, upliftModifer);
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}
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}
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}
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/// <summary>
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/// adds explosion force to given rigidbody
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/// </summary>
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/// <param name="body">rigidbody to add force to</param>
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/// <param name="explosionForce">base force of explosion</param>
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/// <param name="explosionPosition">location of the explosion source</param>
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/// <param name="explosionRadius">radius of explosion effect</param>
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/// <param name="upliftModifier">factor of additional upward force</param>
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private void AddExplosionForce(Rigidbody2D body, float explosionForce, Vector3 explosionPosition, float explosionRadius, float upliftModifier = 0)
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{
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var dir = (body.transform.position - explosionPosition);
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float wearoff = 1 - (dir.magnitude / explosionRadius);
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Vector3 baseForce = dir.normalized * explosionForce * wearoff;
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baseForce.z = 0;
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body.AddForce(baseForce);
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if (upliftModifer != 0)
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{
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float upliftWearoff = 1 - upliftModifier / explosionRadius;
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Vector3 upliftForce = Vector2.up * explosionForce * upliftWearoff;
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upliftForce.z = 0;
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body.AddForce(upliftForce);
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}
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}
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}
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