83 lines
2.4 KiB
C#
83 lines
2.4 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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[RequireComponent(typeof(Rigidbody2D))]
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public class ContactDamage : MonoBehaviour {
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public float minImpulse = 100.0f;
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public float maxImpulse = 300.0f;
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public float maxDamage = 100.0f;
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private List<ContactDamage> _ignore = new List<ContactDamage>();
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public void AddIgnoreObject(ContactDamage other) {
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_ignore.Add(other);
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}
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void FixedUpdate() {
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_ignore.Clear();
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}
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void OnImpulse(float impulse, Vector2 point, GameObject impulseSource) {
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if (impulse >= minImpulse) {
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float k = 1.0f - (impulse - maxImpulse) / (minImpulse - maxImpulse);
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float damage = k * maxDamage;
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var health = GetComponent<Health>();
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if (health != null) {
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health.ApplyDamage(damage, impulseSource, point);
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}
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}
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}
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void OnCollisionEnter2D(Collision2D col) {
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var otherHuman = col.transform.GetComponent<HumanController>();
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var thisHuman = GetComponent<HumanController>();
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if (otherHuman != null && thisHuman != null) {
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return;
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}
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var otherDamageController = col.transform.GetComponent<ContactDamage>();
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if (otherDamageController != null){
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if (_ignore.Contains(otherDamageController)) {
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Debug.Log("Skip damage on " + name);
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return;
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}
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else {
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otherDamageController.AddIgnoreObject(this);
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}
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}
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float impulse;
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var rb = GetComponent<Rigidbody2D>();
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var v1 = rb.GetWorldPointVelocityEx(col.contacts[0].point);
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Vector2 v2 = Vector2.zero;
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float m2;
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Vector2 relativeVelocity;
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if (col.rigidbody != null && !col.rigidbody.isKinematic) {
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v2 = col.rigidbody.GetWorldPointVelocityEx(col.contacts[0].point);
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m2 = col.rigidbody.mass;
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}
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else {
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v2 = Vector2.zero;
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m2 = 0;
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}
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relativeVelocity = v2 - v1;
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impulse = (rb.mass*v1 + m2*v2).magnitude;
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Debug.LogFormat("Collision! Impulse = {0} on object {1} ({4}), relative velocity = {2}, self velocity = {3}", impulse, name, relativeVelocity.magnitude, v1.magnitude, col.transform.name);
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OnImpulse(impulse, col.contacts[0].point, col.gameObject);
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if (otherDamageController != null) {
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otherDamageController.OnImpulse(impulse, col.contacts[0].point, gameObject);
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}
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}
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}
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