/// <summary>
/// Copyright (c) 2021 MirzkisD1Ex0 All rights reserved.
/// Code Version 1.0
/// </summary>
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
namespace ToneTuneToolkit.Mobile
{
public class ObjectRotateAndScale : MonoBehaviour
{
private Vector2 oldPosA;
private Vector2 oldPosB;
private void Update()
{
if (Input.GetMouseButton(0))
{
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;
if (Physics.Raycast(ray, out hit))
{
if (hit.collider.tag == "Player") // 如果射线不在Tag为Player的物体上则跳过后续的步骤
{
if (Input.touchCount == 1)
{
ObjectRotate();
}
if (Input.touchCount == 2)
{
ObjectScale();
}
}
}
}
}
/// <summary>
/// 单指操作
/// 旋转
/// </summary>
private void ObjectRotate()
{
if (Input.GetTouch(0).phase == TouchPhase.Moved)
{
float offsetX = Input.GetAxis("Mouse X");
float offsetY = Input.GetAxis("Mouse Y");
transform.Rotate(new Vector3(offsetY, -offsetX, 0) * 10f, Space.World);
}
return;
}
/// <summary>
/// 双指操作
/// 缩放
/// </summary>
private void ObjectScale()
{
if (Input.GetTouch(0).phase == TouchPhase.Moved || Input.GetTouch(1).phase == TouchPhase.Moved)
{
Vector2 newPosA = Input.GetTouch(0).position;
Vector2 newPosB = Input.GetTouch(1).position;
float oldScale;
float newScale;
oldScale = transform.localScale.x;
if (IsEnlarge(oldPosA, oldPosB, newPosA, newPosB))
{
newScale = oldScale * 1.02f;
}
else
{
newScale = oldScale / 1.02f;
}
transform.localScale = new Vector3(newScale, newScale, newScale);
oldPosA = newPosA;
oldPosB = newPosB;
}
}
/// <summary>
/// 双指触点判断
/// 远了就是放大
/// </summary>
/// <param name="oldPositionA"></param>
/// <param name="oldPositionB"></param>
/// <param name="newPositionA"></param>
/// <param name="newPositionB"></param>
/// <returns></returns>
private bool IsEnlarge(Vector2 oldPositionA, Vector2 oldPositionB, Vector2 newPositionA, Vector2 newPositionB)
{
float oldDistance = Vector2.Distance(oldPositionA, oldPositionB);
float newDistance = Vector2.Distance(newPositionA, newPositionB);
if (oldDistance < newDistance)
{
return true;
}
return false;
}
}
}
