96 lines
3.7 KiB
C#
96 lines
3.7 KiB
C#
/// ---------------------------------------------
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/// Behavior Designer
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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.BehaviorDesigner.Samples
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{
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using UnityEngine;
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/// <summary>
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/// Moves a projectile towards the specified target.
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/// </summary>
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public class Projectile : MonoBehaviour
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{
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[Tooltip("The speed at which the projectile should move.")]
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[SerializeField] protected float m_Speed = 5;
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[Tooltip("The amount of damage that should be applied.")]
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[SerializeField] protected float m_DamageAmount = 20;
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[Tooltip("The +/- range of damage that should be applied.")]
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[SerializeField] protected float m_DamageVariance;
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[Tooltip("Should the y-axis direction be ignored?")]
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[SerializeField] protected bool m_IgnoreY = true;
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[Tooltip("Should the projectile rotate towards the target?")]
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[SerializeField] protected bool m_RotateTowardsTarget;
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private Transform m_Transform;
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private Transform m_Target;
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/// <summary>
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/// Initializes the projectile to the specified target.
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/// </summary>
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/// <param name="target">The target the projectile should move towards.</param>
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public void Initialize(GameObject target)
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{
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m_Transform = transform;
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m_Target = target.transform;
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if (m_RotateTowardsTarget) {
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var direction = GetDirection();
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var angle = Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg;
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m_Transform.rotation = Quaternion.AngleAxis(angle, Vector3.forward);
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}
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}
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/// <summary>
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/// Returns the direction that the projectile should move.
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/// </summary>
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/// <returns>The direction that the projectile should move.</returns>
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private Vector3 GetDirection()
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{
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var direction = m_Target.position - m_Transform.position;
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if (m_IgnoreY) {
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direction.y = 0;
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}
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return direction.normalized;
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}
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/// <summary>
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/// Move towards the target.
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/// </summary>
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private void Update()
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{
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var direction = GetDirection();
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m_Transform.position += direction * m_Speed * Time.deltaTime;
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if (m_RotateTowardsTarget) {
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var angle = Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg;
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m_Transform.rotation = Quaternion.AngleAxis(angle, Vector3.forward);
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}
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}
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/// <summary>
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/// The projectile collided with another object.
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/// </summary>
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/// <param name="collision">The other object.</param>
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private void OnCollisionEnter(Collision collision)
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{
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Health health;
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if (collision.transform == m_Target && (health = collision.collider.gameObject.GetComponent<Health>()) != null) {
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health.Value -= (m_DamageAmount + Random.Range(-m_DamageVariance, m_DamageVariance));
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Destroy(gameObject);
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}
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}
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/// <summary>
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/// The projectile collided with another object.
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/// </summary>
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/// <param name="collision">The other object.</param>
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private void OnCollisionEnter2D(Collision2D collision)
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{
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Health health;
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if (collision.transform == m_Target && (health = collision.collider.gameObject.GetComponent<Health>()) != null) {
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health.Value -= (m_DamageAmount + Random.Range(-m_DamageVariance, m_DamageVariance));
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Destroy(gameObject);
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}
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}
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}
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} |