89 lines
3.2 KiB
C#
89 lines
3.2 KiB
C#
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/// ---------------------------------------------
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/// Ultimate Character Controller
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/// Copyright (c) Opsive. All Rights Reserved.
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/// https://www.opsive.com
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/// ---------------------------------------------
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namespace Opsive.UltimateCharacterController.Objects.ItemAssist
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{
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using Opsive.Shared.Game;
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using UnityEngine;
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/// <summary>
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/// Represents a shell casing which uses the trajectory object for kinematic shell movement.
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/// </summary>
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[RequireComponent(typeof(Rigidbody))]
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public class Shell : TrajectoryObject
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{
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[Tooltip("Time to live in seconds before the shell is removed.")]
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[SerializeField] protected float m_Lifespan = 10;
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[Tooltip("Chance of shell not being removed after settling on the ground.")]
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[Range(0, 1)] [SerializeField] protected float m_Persistence = 1;
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private float m_RemoveTime;
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private Vector3 m_StartScale;
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/// <summary>
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/// Initialize the default values.
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/// </summary>
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protected override void Awake()
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{
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base.Awake();
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m_StartScale = transform.localScale;
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// The Rigidbody is only used to notify Unity that the object isn't static. The Rigidbody doesn't control any movement.
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var rigidbody = GetComponent<Rigidbody>();
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rigidbody.mass = m_Mass;
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rigidbody.isKinematic = true;
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rigidbody.constraints = RigidbodyConstraints.FreezeAll;
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}
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/// <summary>
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/// The shell has been spawned - reset the timing and component values.
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/// </summary>
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protected override void OnEnable()
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{
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base.OnEnable();
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m_RemoveTime = Time.time + m_Lifespan;
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m_Transform.localScale = m_StartScale;
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if (m_Collider != null) {
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m_Collider.enabled = true;
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}
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}
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/// <summary>
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/// Move and rotate the object according to a parabolic trajectory.
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/// </summary>
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protected override void FixedUpdate()
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{
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base.FixedUpdate();
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if (Time.time > m_RemoveTime) { // The shell should be removed.
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m_Transform.localScale = Vector3.Lerp(m_Transform.localScale, Vector3.zero, Utility.TimeUtility.FramerateDeltaTime * 0.2f);
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if (Time.time > m_RemoveTime + 0.5f) {
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ObjectPool.Destroy(m_GameObject);
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}
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}
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}
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/// <summary>
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/// The object has collided with another object.
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/// </summary>
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/// <param name="hit">The RaycastHit of the object. Can be null.</param>
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protected override void OnCollision(RaycastHit? hit)
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{
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base.OnCollision(hit);
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if (m_Velocity.sqrMagnitude > 4) { // Hard bounce.
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// Apply more random rotation velocity to make the shell behave a bit unpredictably on a hard bounce (similar to real brass shell behavior).
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AddTorque(Random.rotation.eulerAngles * 0.15f * (Random.value > 0.5f ? 1 : -1));
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} else if (Random.value > m_Persistence) { // Soft bounce.
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// Remove the shell after half a second on a soft bounce.
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m_RemoveTime = Time.time + 0.5f;
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}
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}
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}
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}
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