68 lines
1.9 KiB
C#
68 lines
1.9 KiB
C#
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using System.Collections;
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using UnityEngine;
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namespace Unity.Cinemachine.Samples
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{
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public class SimpleBullet : MonoBehaviour
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{
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public LayerMask CollisionLayers = 1;
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public float Speed = 500;
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public float Lifespan = 3;
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[Tooltip("Stretch factor in the direction of motion while flying")]
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public float Stretch = 6;
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float m_Speed;
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Vector3 m_SpawnPoint;
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void OnValidate()
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{
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Speed = Mathf.Max(1, Speed);
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Lifespan = Mathf.Max(0.2f, Lifespan);
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}
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void OnEnable()
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{
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m_Speed = Speed;
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m_SpawnPoint = transform.position;
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SetStretch(1);
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StartCoroutine(DeactivateAfter());
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}
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void Update()
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{
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if (m_Speed > 0)
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{
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var t = transform;
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if (UnityEngine.Physics.Raycast(
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t.position, t.forward, out var hitInfo, m_Speed * Time.deltaTime, CollisionLayers,
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QueryTriggerInteraction.Ignore))
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{
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t.position = hitInfo.point;
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m_Speed = 0;
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SetStretch(1);
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}
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var deltaPos = m_Speed * Time.deltaTime;
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t.position += deltaPos * t.forward;
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// Clamp the stretch to avoid the bullet stretching back past the spawn point.
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// This code assumes that the bullet length is 1.
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SetStretch(Mathf.Min(1 + deltaPos * Stretch, Vector3.Distance(t.position, m_SpawnPoint)));
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}
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}
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void SetStretch(float stretch)
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{
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var scale = transform.localScale;
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scale.z = stretch;
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transform.localScale = scale;
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}
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IEnumerator DeactivateAfter()
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{
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yield return new WaitForSeconds(Lifespan);
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gameObject.SetActive(false);
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}
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}
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}
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