模型旋转缩放

虚拟仿真实验常常会用到对模型简单的旋转跟缩放。

简单实现了一下，有加阻尼效果，贴在需要旋转的模型上便可。

using UnityEngine;
using System.Collections;

public class modelController : MonoBehaviour {
    private float axisX;
    private float axisY;

    private float leap_Distance;
    bool iszuni;
    bool isxuanzhuan;
    
    float x;
    float y;

    float f_beginSize;
    Vector3 v_beginRotate;

    void Awake()
    {
        axisY  = 0;
        axisX  = 0;
        leap_Distance = f_beginSize = transform.localScale.x;
        v_beginRotate = transform.localEulerAngles;
    }

    void Update()
    {
        ZoomScale();
        if (iszuni)
        {
            transform.localScale = Vector3.Lerp(transform.localScale, Vector3.one * leap_Distance, 0.2f);
        }

        if (Input.GetMouseButton(0))
        {//鼠标按着左键移动 
            y = Input.GetAxis("Mouse X") * 8;
            x = Input.GetAxis("Mouse Y") * 8;
            isxuanzhuan = true;
        }
        else
        {
            x = y = 0;
        }
        if (isxuanzhuan)
        {
            axisY = Mathf.Lerp(axisY, y,0.2f);
            axisX = Mathf.Lerp(axisX, x,0.2f);
            //旋转角度（增加）
            transform.Rotate(new Vector3(axisX, -axisY, 0), Space.World);
        }
    }

    
    /// <summary>
    /// 鼠标滚轮缩放物体的方法(Scale)
    /// </summary>
    void ZoomScale()
    {
        if (Input.GetAxis("Mouse ScrollWheel") != 0)
        {
            leap_Distance += Input.GetAxis("Mouse ScrollWheel") * f_beginSize;
            //最大扩大2倍，最小缩小0.5倍
            if (leap_Distance < (f_beginSize * 0.5f))
            {
                leap_Distance = f_beginSize * 0.5f;
            }
            if (leap_Distance > f_beginSize * 2)
            {
                leap_Distance = f_beginSize * 2;
            }
            iszuni = true;
        }
    }

    /// <summary>
    /// 重置
    /// </summary>
    public void ResetScale()
    {
        iszuni = false;
        leap_Distance = f_beginSize;
        transform.localScale = Vector3.one * f_beginSize;
        transform.localEulerAngles = v_beginRotate;
    }
}