阶段性完成

Assets/External VFXs/Archanor/Sci-Fi Arsenal/Sci-Fi Effects/Scripts/SciFiBeamStatic.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace SciFiArsenal
+{
+
+public class SciFiArsenalBeamStatic : MonoBehaviour
+{
+
+    [Header("Prefabs")]
+    public GameObject beamLineRendererPrefab; //Put a prefab with a line renderer onto here.
+    public GameObject beamStartPrefab; //This is a prefab that is put at the start of the beam.
+    public GameObject beamEndPrefab; //Prefab put at end of beam.
+
+    private GameObject beamStart;
+    private GameObject beamEnd;
+    private GameObject beam;
+    private LineRenderer line;
+
+    [Header("Beam Options")]
+    public bool beamCollides = true; //Beam stops at colliders
+    public float beamLength = 100; //Ingame beam length
+    public float beamEndOffset = 0f; //How far from the raycast hit point the end effect is positioned
+    public float textureScrollSpeed = 0f; //How fast the texture scrolls along the beam, can be negative or positive.
+    public float textureLengthScale = 1f;   //Set this to the horizontal length of your texture relative to the vertical. Example: if texture is 200 pixels in height and 600 in length, set this to 3
+	
+	[Header("Width Pulse Options")]
+	public float widthMultiplier = 1.5f;
+	private float customWidth;
+	private float originalWidth;
+	private float lerpValue = 0.0f;
+	public float pulseSpeed = 1.0f;
+	private bool pulseExpanding = true;
+
+    void Start()
+    {
+		SpawnBeam();
+		originalWidth = line.startWidth;
+		customWidth = originalWidth * widthMultiplier;
+    }
+
+    void FixedUpdate()
+	{
+		if (beam) 
+		{
+			line.SetPosition(0, transform.position);
+			Vector3 end = transform.position + (transform.forward * beamLength);
+			RaycastHit hit;
+			
+			if (beamCollides && Physics.Raycast(transform.position, transform.forward, out hit))
+			{
+				end = hit.point - (transform.forward * beamEndOffset);
+				end = Vector3.Distance(transform.position, end) > beamLength 
+					? transform.position + (transform.forward * beamLength) 
+					: end;
+			}
+			else
+			{
+				end = transform.position + (transform.forward * beamLength);
+			}
+				
+			line.SetPosition(1, end);
+			beamStart.transform.position = transform.position;
+			beamStart.transform.LookAt(end);
+			beamEnd.transform.position = end;
+			beamEnd.transform.LookAt(beamStart.transform.position);
+			float distance = Vector3.Distance(transform.position, end);
+			line.material.mainTextureScale = new Vector2(distance / textureLengthScale, 1); //This sets the scale of the texture so it doesn't look stretched
+			line.material.mainTextureOffset -= new Vector2(Time.deltaTime * textureScrollSpeed, 0); //This scrolls the texture along the beam if not set to 0
+		}
+		
+		// Pulse the width of the beam
+		if (pulseExpanding) 
+		{
+			lerpValue += Time.deltaTime * pulseSpeed;
+		} 
+		else 
+		{
+			lerpValue -= Time.deltaTime * pulseSpeed;
+		}
+
+		if (lerpValue >= 1.0f) 
+		{
+			pulseExpanding = false;
+			lerpValue = 1.0f;
+		} 
+		else if (lerpValue <= 0.0f) 
+		{
+			pulseExpanding = true;
+			lerpValue = 0.0f;
+		}
+
+		float currentWidth = Mathf.Lerp(originalWidth, customWidth, Mathf.Sin(lerpValue * Mathf.PI));
+		
+		line.startWidth = currentWidth;
+		line.endWidth = currentWidth;
+	}
+
+    public void SpawnBeam()
+	{
+		if (beamLineRendererPrefab)
+		{
+			beam = Instantiate(beamLineRendererPrefab);
+			beam.transform.position = transform.position;
+			beam.transform.parent = transform;
+			beam.transform.rotation = transform.rotation;
+
+			line = beam.GetComponent<LineRenderer>();
+			line.useWorldSpace = true;
+
+			#if UNITY_5_5_OR_NEWER
+			line.positionCount = 2;
+			#else
+			line.SetVertexCount(2); 
+			#endif
+
+			beamStart = beamStartPrefab ? Instantiate(beamStartPrefab, beam.transform) : null;
+			beamEnd = beamEndPrefab ? Instantiate(beamEndPrefab, beam.transform) : null;
+		}
+		else
+		{
+			Debug.LogError("A prefab with a line renderer must be assigned to the `beamLineRendererPrefab` field in the SciFiArsenalBeamStatic script on " + gameObject.name);
+		}
+	}
+
+}
+}