工具类

public class ShootTool
{private Transform start, target, control;private float speed, height;private Vector3 moveDir = Vector3.zero;private Vector3[] moveNode;private int moveIndex = 5;private int segmentNumber = 30;private LineRenderer lineRenderer = null;private bool onShoot = false;private Vector3 originalPos = Vector3.zero;private Vector3 originalRot = Vector3.zero;public void InitData(Transform startTemp, Transform controlTemp, Transform targetTemp, float speedTemp, float heightTemp, LineRenderer line = null) {start = startTemp;control = controlTemp;target = targetTemp;speed = speedTemp;height = heightTemp;lineRenderer = line;originalPos = start.transform.position;originalRot = start.transform.eulerAngles;}public void OnBegin(){if (onShoot) return;moveNode = GetBeizerList(start.position, control.position, target.position, segmentNumber);onShoot = true;}public void OnUpdate(){DrawCurve();if (onShoot){           if (moveIndex >= moveNode.Length){              OnFlyFinish();return;} moveDir = (moveNode[moveIndex] - start.transform.position).normalized;start.LookAt(moveNode[moveIndex]);start.transform.position += moveDir * Time.deltaTime * speed;if (Vector3.Distance(start.transform.position, moveNode[moveIndex]) <= 0.5f) moveIndex += 1;}}private void OnFlyFinish(){onShoot = false;moveIndex = 5;start.gameObject.SetActive(false);start.transform.position = originalPos;start.transform.eulerAngles = originalRot;start.gameObject.SetActive(true);}private void DrawCurve(){if (lineRenderer == null) return;for (int i = 1; i <= segmentNumber; i++){float value = i / (float)segmentNumber;Vector3 pixel = CalculateCubicBezierPoint(value, originalPos, control.position, target.position);lineRenderer.positionCount = i;lineRenderer.SetPosition(i - 1, pixel);}}private Vector3 CalculateCubicBezierPoint(float value, Vector3 startPoint, Vector3 controlPoint, Vector3 endPoint){float tempValue01 = 1 - value;float tempValue02 = value * value;float tempValue03 = tempValue01 * tempValue01;Vector3 newPos = tempValue03 * startPoint;newPos += 2 * tempValue01 * value * controlPoint;newPos += tempValue02 * endPoint;return newPos;}public Vector3[] GetBeizerList(Vector3 startPoint, Vector3 controlPoint, Vector3 endPoint, int segmentNumber){Vector3[] path = new Vector3[segmentNumber];for (int i = 1; i <= segmentNumber; i++){float value = i / (float)segmentNumber;Vector3 pixel = CalculateCubicBezierPoint(value, startPoint, controlPoint, endPoint);path[i - 1] = pixel;}return path;}
}

调用类

public class ShootToolExample : MonoBehaviour
{[SerializeField] Transform start, target, control;[SerializeField] float height = 40;[SerializeField] float speed = 30;[SerializeField] LineRenderer lineRenderer;private ShootTool shootTool = new ShootTool();private void Awake(){shootTool = new ShootTool();shootTool.InitData(start, control, target, speed, height, lineRenderer);}private void Update(){if (Input.GetMouseButton(0)) { shootTool.OnBegin(); }shootTool.OnUpdate();}
}