Unity 大地图滑动与缩放

目录

1.UGUI实现大地图滚动与缩放

2.Sprite Renderer实现大地图滑动与缩放

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1.UGUI实现大地图滚动与缩放

 

 如图，大地图尺寸是超出屏幕1920*1080的，我们使用ScrollView实现大地图滑动

 ⚠️注意：camera使用 Perspective

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class UiScale : MonoBehaviour
{
    public ScrollRect bgScroll;

    private float lastDis = 0;
    private float cameraDis = 0;

    void Start()
    {

    }

    private void OnEnable()
    {
    }

    void Update()
    {
        if (Input.touchCount > 1)
        {
            bgScroll.horizontal = false;
            bgScroll.vertical = false;
            Touch t1 = Input.GetTouch(0);
            Touch t2 = Input.GetTouch(1);
            if (t2.phase == TouchPhase.Began)
            {
                lastDis = Vector2.Distance(t1.position, t2.position);
            }
            else
            if (t1.phase == TouchPhase.Moved && t2.phase == TouchPhase.Moved)
            {
                float dis = Vector2.Distance(t1.position, t2.position);
                if (Mathf.Abs(dis - lastDis) > 1)
                {
                    if (dis != lastDis)
                    {
                        if (dis < lastDis)
                        {
                            if (cameraDis != 0)
                            {
                                cameraDis += 10;
                                cameraDis = Mathf.Clamp(cameraDis, -50, 0);
                                lastDis = dis;
                            }
                        }
                        else
                        {
                            if (cameraDis != -50)
                            {
                                cameraDis -= 10;
                                cameraDis = Mathf.Clamp(cameraDis, -50, 0);
                                lastDis = dis;
                            }
                        }
                    }
                }
            }
        }
        else
        {
            bgScroll.horizontal = true;
            bgScroll.vertical = true;
        }

        if (Input.mouseScrollDelta.y != 0)
        {
            if (Input.mouseScrollDelta.y > 0)
            {
                cameraDis -= 10;
                cameraDis = Mathf.Clamp(cameraDis, -50, 0);
            }
            else
            {
                cameraDis += 10;
                cameraDis = Mathf.Clamp(cameraDis, -50, 0);
            }
        }

        if (Input.GetKeyDown(KeyCode.Escape))
        {
            Application.Quit();
        }
    }

    private void LateUpdate()
    {
        if (this.transform.position.z == cameraDis) { return; }
        this.transform.position = new Vector3(this.transform.position.x, this.transform.position.y, cameraDis);
    }

}

2.Sprite Renderer实现大地图滑动与缩放

 

 ⚠️注意:Camera使用Orthographic

using UnityEngine;

public class SpriteBgContr : MonoBehaviour
{
    public Camera _camera;

    private Vector3 oriMousePos;
    private Vector3 oriPos;

    private int curDis = 3;
    private float lastDis = 0;

    void Start()
    {

    }

    void Update()
    {

    }

    private void OnMouseDown()
    {
        oriMousePos = Input.mousePosition;
        oriPos = _camera.transform.position;
    }

    private void OnMouseDrag()
    {
        if (Input.touchCount > 1)
        {
            Touch t1 = Input.GetTouch(0);
            Touch t2 = Input.GetTouch(1);
            if (t2.phase == TouchPhase.Began)
            {
                lastDis = Vector2.Distance(t1.position, t2.position);
            }
            else
            if (t1.phase == TouchPhase.Moved && t2.phase == TouchPhase.Moved)
            {
                float dis = Vector2.Distance(t1.position, t2.position);
                if (Mathf.Abs(dis - lastDis) > 1)
                {
                    if (dis != lastDis)
                    {
                        if (dis < lastDis)
                        {
                            if (curDis < 3)
                            {
                                curDis += 1;
                                curDis = Mathf.Clamp(curDis, 1, 3);
                                lastDis = dis;
                            }
                        }
                        else
                        {
                            if (curDis > 1)
                            {
                                curDis -= 1;
                                curDis = Mathf.Clamp(curDis, 1, 3);
                                lastDis = dis;
                            }
                        }
                    }
                }
            }
        }
        else
        {
            var offsetX = _camera.ScreenToWorldPoint(Input.mousePosition).x - _camera.ScreenToWorldPoint(oriMousePos).x;
            var offsetY = _camera.ScreenToWorldPoint(Input.mousePosition).y - _camera.ScreenToWorldPoint(oriMousePos).y;
            _camera.transform.position = new Vector3(Mathf.Clamp(oriPos.x - offsetX, -4, 4), Mathf.Clamp(_camera.transform.position.y - offsetY, -2, 2), -10);
        }
    }

    private void LateUpdate()
    {
        if (_camera.fieldOfView == curDis) { return; }
        _camera.orthographicSize = curDis;
    }
}