unity 模型旋转与放大缩小

ainatipen · 发表于 2022-5-5 14:58

版本unity2020.3.31
一、安卓手机实现手指滑动旋转模型
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Rotate : MonoBehaviour
{

//上一个手指的位置
//Vector3 PrevlousPosition;
//手指的偏移值
//Vector3 Offset;

//速度
float xSpeed = 150f;

void Start()
{

}

void Update()
{

      //如果触摸了屏幕
      if (Input.GetMouseButton(0))
      {
         //判断是几个手指触摸
         if (Input.touchCount == 1)
         {
            //第一个触摸到手指头 phase状态 Moved滑动
            if (Input.GetTouch(0).phase == TouchPhase.Moved)
            {
                  //根据你旋转的模型物体是要围绕哪一个轴旋转 Vector3.up是围绕Y旋转
                  transform.Rotate(Vector3.up * Input.GetAxis(&#34;Mouse X&#34;) * xSpeed * Time.deltaTime);
            }
         }
      }
}
}
二、安卓手机实现放大缩小模型
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

//放大缩小功能 f
public class Scale : MonoBehaviour
{

Vector2 oldPos1;
Vector2 oldPos2;

// Use this for initialization
void Start()
{

}

// Update is called once per frame
void Update()
{
      if (Input.touchCount == 2)
      {
         if (Input.GetTouch(0).phase == TouchPhase.Moved || Input.GetTouch(1).phase == TouchPhase.Moved)
         {
            Vector2 temPos1 = Input.GetTouch(0).position;
            Vector2 temPos2 = Input.GetTouch(1).position;

            if (isEnLarge(oldPos1, oldPos2, temPos1, temPos2))
            {
                  float oldScale = transform.localScale.x;
                  //放大的倍数如果要修改列如:oldScale * 1.025f 修改成 oldScale * 1.25f 根据自己需求修改
                  float newScale = oldScale * 1.025f;

                  transform.localScale = new Vector3(newScale, newScale, newScale);
            }
            else
            {
                  float oldScale = transform.localScale.x;
                  //缩小的倍数如果要修改列如:oldScale / 1.025f 修改成 oldScale / 1.25f 根据自己需求修改
                  float newScale = oldScale / 1.025f;

                  transform.localScale = new Vector3(newScale, newScale, newScale);
            }

            oldPos1 = temPos1;
            oldPos2 = temPos2;

         }
      }
}

bool isEnLarge(Vector2 oP1, Vector2 oP2, Vector2 nP1, Vector2 nP2)
{

      float length1 = Mathf.Sqrt((oP1.x - oP2.x) * (oP1.x - oP2.x) + (oP1.y - oP2.y) * (oP1.y - oP2.y));
      float length2 = Mathf.Sqrt((nP1.x - nP2.x) * (nP1.x - nP2.x) + (nP1.y - nP2.y) * (nP1.y - nP2.y));

      if (length1 < length2)
      {
         return true;
      }
      else
      {
         return false;
      }

}
}

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