Unity中用触摸控制物体旋转和放大

来源：互联网发布：网络阅卷注意事项编辑：程序博客网时间：2024/06/06 06:29
using UnityEngine;using System.Collections;using System.IO;public class ScaleAndRotate : MonoBehaviour{private Touch oldTouch1;  //上次触摸点1(手指1)private Touch oldTouch2;  //上次触摸点2(手指2)void Start(){}void Update () {//没有触摸if ( Input.touchCount <= 0 ){return;}//单点触摸， 水平上下旋转if( 1 == Input.touchCount ){Touch touch = Input.GetTouch (0);Vector2 deltaPos = touch.deltaPosition;transform.Rotate(Vector3.down  * deltaPos.x , Space.World); transform.Rotate(Vector3.right * deltaPos.y , Space.World);}//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 / 100f;Vector3 localScale = transform.localScale;Vector3 scale = new Vector3(localScale.x + scaleFactor,                            localScale.y + scaleFactor,                             localScale.z + scaleFactor);//最小缩放到 0.3 倍if (scale.x > 0.3f && scale.y > 0.3f && scale.z > 0.3f) {transform.localScale = scale;}//记住最新的触摸点，下次使用oldTouch1 = newTouch1;oldTouch2 = newTouch2;}}
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