获取方向鼠标拖动unity3d c#

本文关键字：unity3d 拖动 鼠标 方向 获取 | 更新日期: 2023-09-27 18:12:53

我正在制作一款unity 2d游戏，其中我想让一辆汽车成为沿弯曲道路行驶的可拖动对象。我已经添加了以下脚本的汽车，这只适用于向前拖动。我如何检测用户是向前拖动还是向后拖动在mouseDrag事件内?我是unity的新手，我更喜欢只使用c#而不是js。

using UnityEngine;
using System.Collections;
[RequireComponent(typeof(BoxCollider2D))]
public class TouchInput : MonoBehaviour {
private Vector3 screenPoint;
private Vector3 offset;
public float speed = 20.0f;
Rigidbody2D rb;
void Start(){
rb = gameObject.GetComponent<Rigidbody2D>();
}
void OnMouseDown(){
}
void OnMouseDrag(){
Vector3 cursorPoint = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPoint.z);
Vector3 cursorPosition = Camera.main.ScreenToWorldPoint(cursorPoint) + offset;
rb.velocity = new Vector3(150 * Time.deltaTime, 0, 0);
}
void OnMouseUp()
{
rb.velocity = new Vector3(0, 0, 0);
}
}

获取方向鼠标拖动unity3d c#

我写了这个简单的教程，它基本上是7行代码，工作起来像一个魅力。简单易行。你只需要使用Unity事件系统去编写冗长而无用的代码。无需使用更新或固定更新

请试试这个(方向算法在这里):

using UnityEngine;
using System.Collections;
[RequireComponent(typeof(BoxCollider2D))]
public class TouchInput : MonoBehaviour
{
    private Vector3 screenPoint;
    private Vector3 initialPosition;
    private Vector3 offset;
    public float speed = 20.0f;
    Rigidbody2D rb;
    void Start()
    {
        rb = gameObject.GetComponent<Rigidbody2D>();
    }
    void OnMouseDown()
    {
        Vector3 cursorPoint = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPoint.z);
        Vector3 initialPosition = Camera.main.ScreenToWorldPoint(cursorPoint) + offset;
    }
    void OnMouseDrag()
    {
        Vector3 cursorPoint = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPoint.z);
        Vector3 cursorPosition = Camera.main.ScreenToWorldPoint(cursorPoint) + offset;
        Vector3 heading = cursorPosition - initialPosition;
        Vector3 direction = heading / heading.magnitude; // heading magnitude = distance 
        rb.velocity = new Vector3(150 * Time.deltaTime, 0, 0);
        //Do what you want.
        //if you want to drag object on only swipe gesture comment below. Otherwise:
        initialPosition = cursorPosition;
    }
    void OnMouseUp()
    {
        rb.velocity = new Vector3(0, 0, 0);
    }
}
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