unity , 脚本拖动相机答案

【问题标题】：Unity , script to drag cameraunity , 脚本拖动相机
【发布时间】：2020-01-11 01:11:47
【问题描述】：

我在 XY 平面上有二维网格。我有以下脚本将相机移动到平面上，相机从 (0,0,-10) 开始。

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

public class DragMap : MonoBehaviour {
private float dist;
private Vector3 MouseStart;
private Vector3 derp;

void Start () {
    dist = transform.position.z;  // Distance camera is above map
}

void Update () {
    if (Input.GetMouseButtonDown (2)) {
        MouseStart = new Vector3(Input.mousePosition.x, Input.mousePosition.y, dist);
        MouseStart = Camera.main.ScreenToWorldPoint (MouseStart);
        MouseStart.z = transform.position.z;

    } 
    else if (Input.GetMouseButton (2)) {
        var MouseMove = new Vector3(Input.mousePosition.x, Input.mousePosition.y, dist);
        MouseMove = Camera.main.ScreenToWorldPoint (MouseMove);
        MouseMove.z = transform.position.z;
        transform.position = transform.position - (MouseMove - MouseStart);
    }
}
}

但我终其一生都无法弄清楚要改变什么，所以如果我向右拖动鼠标，相机就会向左移动，反之亦然。同样，如果我向上拖动鼠标，我想向下移动相机，反之亦然。帮助！

感谢您的任何回复。

-欧米茄博士。

【问题讨论】：

你的代码目前是做什么的？拖动时移动方向错误？
当我向右拖动鼠标时，它会向右移动相机，但我想反转它。

标签： c# unity3d

【解决方案1】：

你需要对 MouseMove 向量的 x 取反才能只翻转 x 的移动：

MouseMove = new Vector3(-MouseMove.x, MouseMove.y, MouseMove.z);

【讨论】：

【解决方案2】：

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

public class DragMap : MonoBehaviour {
private float dist;
private Vector3 MouseStart;
private Vector3 derp;

void Start () {
    dist = transform.position.z;  // Distance camera is above map
}

void Update () {
    if (Input.GetMouseButtonDown (2)) {
        MouseStart = new Vector3(Input.mousePosition.x, Input.mousePosition.y, dist);
        MouseStart = Camera.main.ScreenToWorldPoint (MouseStart);
        MouseStart.z = transform.position.z;

    } 
    else if (Input.GetMouseButton (2)) {
        var MouseMove = new Vector3(Input.mousePosition.x, Input.mousePosition.y, dist);
        MouseMove = Camera.main.ScreenToWorldPoint (MouseMove);
        MouseMove.z = transform.position.z;
        transform.position = transform.position - (MouseMove - MouseStart);
    }
}
}

这里有一个简单的解决方法。如果要同时翻转 x 和 y，请将“- (MouseMove - MouseStart)”替换为“+ (MouseMove - MouseStart)”

【讨论】：