Unity模型观察脚本

移动相机脚本，围绕物体实现缩放和旋转

加了SmoothDamp实现缓动

public class ViewAndOperate : MonoBehaviour
{public GameObject target;public float rotateSpeed;public float zoomSpeed;public float rotateSmoothTime; // 缓冲时间参考值public float zoomSmoothTime; // 缩放平滑时间private float currentDistance;private float targetDistance;private float zoomVelocity;public float zoomMinDistance;public float zoomMaxDistance;public float zoomSize;//鼠标滚轮缩放尺度private float currentAngle;private float targetAngle;private float angleVelocity;public float pitchMin;public float pitchMax;private float targetPitch;private float currentPitch;private float pitchVelocity;private void Start(){currentDistance = Vector3.Distance(transform.position, target.transform.position);targetDistance = currentDistance;}private void Update(){float scrollInput = Input.GetAxis("Mouse ScrollWheel")* zoomSize;if (Input.GetMouseButton(1)){float horizontalInput = Input.GetAxis("Mouse X") * rotateSpeed * Time.deltaTime * 100;float verticalInput = -Input.GetAxis("Mouse Y") * rotateSpeed * Time.deltaTime * 100;targetAngle += horizontalInput;targetPitch += verticalInput;targetPitch = Mathf.Clamp(targetPitch, pitchMin, pitchMax);}float smoothAngle = Mathf.SmoothDamp(currentAngle, targetAngle, ref angleVelocity, rotateSmoothTime);float deltaAngle = smoothAngle - currentAngle;currentAngle = smoothAngle;float smoothPitch = Mathf.SmoothDamp(currentPitch, targetPitch, ref pitchVelocity, rotateSmoothTime);float deltaPitch = smoothPitch - currentPitch;currentPitch = smoothPitch;transform.RotateAround(target.transform.position, Vector3.up, deltaAngle);transform.RotateAround(target.transform.position, transform.right, deltaPitch);if (scrollInput != 0){targetDistance = Mathf.Clamp(targetDistance - scrollInput * zoomSpeed, zoomMinDistance, zoomMaxDistance);}currentDistance = Mathf.SmoothDamp(currentDistance, targetDistance, ref zoomVelocity, zoomSmoothTime);Vector3 zoomDirection = (transform.position - target.transform.position).normalized;transform.position = target.transform.position + zoomDirection * currentDistance;}
}