90 lines
2.6 KiB
Plaintext
90 lines
2.6 KiB
Plaintext
using System;
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using UnityEngine;
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using UnityEngine.EventSystems;
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public class RotateImage : MonoBehaviour, IPointerDownHandler, IDragHandler, IPointerUpHandler
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{
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private Vector2 preMousePostion;
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private float currAngle;
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private float targetAngle;
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private float originaleAngle;
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[SerializeField]
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private float rotationSpeed = 4f; // 旋转速度
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[SerializeField]
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private float returnSpeed = 5f; // 回归速度
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[SerializeField]
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[Range(0f, 0.5f)]
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private float m_maxDragLength = 0.2f;
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private float originaleAngleFixed = 90f; // 最大旋转角度限制
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private Action<float> ratateAc;
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private Action<float> m_dragEnd;
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[SerializeField]
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private float m_maxDeg = 30;
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[SerializeField]
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private RectTransform m_rotateTransform;
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public void Init(Action<float> ratateAction, Action<float> dragEnd)
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{
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this.m_dragEnd = dragEnd;
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ratateAc = ratateAction;
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originaleAngle = originaleAngleFixed;
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currAngle = originaleAngle;
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targetAngle = originaleAngle;
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}
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public void ResetStatu()
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{
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currAngle = originaleAngleFixed;
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targetAngle = originaleAngleFixed;
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originaleAngle = originaleAngleFixed;
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}
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private float GetRatio()
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{
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return (currAngle - originaleAngleFixed) / m_maxDeg * -1;
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}
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void Update()
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{
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currAngle = Mathf.Lerp(currAngle,targetAngle,Time.unscaledDeltaTime * 10f);
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m_rotateTransform.localEulerAngles = Vector3.Lerp(m_rotateTransform.localEulerAngles, new Vector3(0, 0, currAngle), Time.unscaledDeltaTime * 10f);
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// 在拖拽结束后，平滑过渡角度回到0度
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//if (!isDragging && Mathf.Abs(targetAngle - originaleAngle) > 0.1f)
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//{
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// targetAngle = Mathf.Lerp(targetAngle, originaleAngle, Time.unscaledDeltaTime * returnSpeed);
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//}
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ratateAc?.Invoke(GetRatio());
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}
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public void OnPointerDown(PointerEventData eventData)
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{
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preMousePostion = eventData.position;
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currAngle = targetAngle;
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}
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public void OnDrag(PointerEventData eventData)
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{
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float maxDragHalfLength = Screen.width * m_maxDragLength;
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float fullLength = maxDragHalfLength * 2;
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float xoffset = (eventData.position - preMousePostion).x;
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float t = (xoffset + maxDragHalfLength) / fullLength;
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// 限制角度范围在左右各30度
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targetAngle = Mathf.Lerp(90 + m_maxDeg, 90 - m_maxDeg, t);
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}
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public void OnPointerUp(PointerEventData eventData)
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{
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targetAngle = originaleAngleFixed;
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m_dragEnd?.Invoke(GetRatio());
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}
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}
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