70 lines
3.2 KiB
C#
70 lines
3.2 KiB
C#
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using UnityEngine;
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namespace DestroyIt
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{
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/// <summary>
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/// Attach this to any rigidbody object that acts as a projectile and may collide with
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/// Destructible objects. This script will play particle effects when the object hits
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/// something, and will do damage to Destructible objects.
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/// </summary>
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[RequireComponent(typeof(Rigidbody))]
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public class RigidbodyProjectile : MonoBehaviour
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{
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public HitBy weaponType = HitBy.Cannonball;
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[Tooltip("Impact velocity must be at least this amount to be detected as a hit.")]
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public float minHitVelocity = 10f;
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private Rigidbody rbody;
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private Vector3 lastVelocity;
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public void OnEnable()
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{
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rbody = GetComponent<Rigidbody>();
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}
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public void FixedUpdate()
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{
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lastVelocity = rbody.velocity;
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}
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public void OnCollisionEnter(Collision collision)
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{
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// Check that the impact is forceful enough to cause damage
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if (collision.relativeVelocity.magnitude < minHitVelocity) return;
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if (collision.contacts.Length == 0) return;
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Collider other = collision.contacts[0].otherCollider;
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// Play hit effects
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HitEffects hitEffects = other.gameObject.GetComponentInParent<HitEffects>();
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if (hitEffects != null && hitEffects.effects.Count > 0)
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hitEffects.PlayEffect(weaponType, collision.contacts[0].point, collision.contacts[0].normal);
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// Apply impact damage to Destructible objects without rigidbodies
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// Only do this for the first active and enabled Destructible script found in parent objects
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// Special Note: Destructible scripts are turned off on terrain trees by default (to save resources), so we will make an exception for them and process the collision anyway
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Destructible[] destObjs = other.gameObject.GetComponentsInParent<Destructible>(false);
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foreach (Destructible destObj in destObjs)
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{
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if (!destObj.isActiveAndEnabled && !destObj.isTerrainTree) continue; // ignore any disabled destructible terrain trees
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if (destObj.GetComponentInParent<DestructibleParent>() != null) continue; // ignore any destructible objects that have DestructibleParent scripts above them, that system already handles rigidbody collisions
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if (other.attachedRigidbody == null || other.attachedRigidbody.GetComponent<Destructible>() == null)
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{
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if (collision.relativeVelocity.magnitude >= destObj.ignoreCollisionsUnder)
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{
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destObj.ProcessDestructibleCollision(collision, gameObject.GetComponent<Rigidbody>());
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rbody.velocity = lastVelocity;
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break;
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}
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}
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}
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// Check for Chip-Away Debris
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ChipAwayDebris chipAwayDebris = collision.contacts[0].otherCollider.gameObject.GetComponent<ChipAwayDebris>();
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if (chipAwayDebris != null)
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chipAwayDebris.BreakOff(collision.relativeVelocity * -1, collision.contacts[0].point);
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}
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}
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}
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