using UnityEngine;

/// /// 此脚本用于手势控制物体的旋转和缩放/// public class UserInputHandler : MonoBehaviour{

#if UNITY_IOS || UNITY_IPHONE public float horizontalSpeed = 0.2f; // 水平和垂直旋转的速度#endif#if UNITY_ANDROID

public float horizontalSpeed = 2.5f; // 水平和垂直旋转的速度#endif public float minScale = 0.6f; // 最小缩放比例 public float maxScale = 1.5f; // 最大缩放比例

private bool m_isOpenScaleGesture = true; /// /// 是否打开缩放手势 /// public bool IsOpenScaleGesture { get { return m_isOpenScaleGesture; } set { m_isOpenScaleGesture = value; } }

private bool m_isOpenRotationGesture = true; /// /// 是否打开 旋转手势 /// public bool IsOpenRotationGesture { get { return m_isOpenRotationGesture; } set { m_isOpenRotationGesture = value; } }

private Vector2 oldPos, newPos; // 此次点击和上次点击的位置 private Touch oldTouch1, oldTouch2; // 此次点击和上次点击的触摸对象

void Update() { //if (Stage.isTouchOnUI) //{ // return; //}

// 若是单点移动触控则进行旋转 if (IsOpenRotationGesture && Input.touchCount == 1) {

{ if (Input.GetTouch(0).phase == TouchPhase.Moved) { Vector2 deltaPosition = Input.GetTouch(0).deltaPosition; if (Mathf.Abs(deltaPosition.x) > 0.1f) { transform.Rotate(transform.up, -(deltaPosition.x * horizontalSpeed), Space.World); } } }

} else if (IsOpenScaleGesture && Input.touchCount == 2) { //多点触摸, 放大缩小 Touch newTouch1 = Input.GetTouch(0); Touch newTouch2 = Input.GetTouch(1);

//第2点刚开始接触屏幕, 只记录，不做处理 if (newTouch2.phase == TouchPhase.Began) { oldTouch2 = newTouch2; oldTouch1 = newTouch1; return; }

//计算老的两点距离和新的两点间距离，变大要放大模型，变小要缩放模型 float oldDistance = Vector2.Distance(oldTouch1.position, oldTouch2.position); float newDistance = Vector2.Distance(newTouch1.position, newTouch2.position);

//两个距离之差，为正表示放大手势， 为负表示缩小手势 float offset = newDistance - oldDistance;

//放大因子， 一个像素按 0.01倍来算(100可调整) float scaleFactor = offset / 250f; Vector3 localScale = transform.localScale; Vector3 scale = new Vector3(localScale.x + scaleFactor, localScale.y + scaleFactor, localScale.z + scaleFactor);

// 限制缩放在一定的范围内 if (scale.x >= minScale && scale.x