Unity 2D：检查精灵是否重叠（c#）答案

【问题标题】：Unity 2D: Check if sprites overlap (c#)Unity 2D：检查精灵是否重叠（c#）
【发布时间】：2020-07-24 16:19:57
【问题描述】：

我正在 2D Unity 中制作一个小型匹配迷你游戏，玩家可以在其中拖放同一类别的不同图像（精灵）。我制作了一个运行良好的拖放脚本，但我不确定如何检查图像是否放置在正确的位置。如果图像匹配不正确，我希望玩家拖过的图像变回原来的位置。如果图像正确匹配，我希望两者都消失。如何检查图像是否重叠。

拖放脚本：

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

public class DragandDrop : MonoBehaviour {

private bool selected;

private void Update()
{
    //Mouse is held down
   if(selected == true)
    {
        Vector2 cursorPos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
        transform.position = new Vector3(cursorPos.x, cursorPos.y, -1.0f);
    } 

   //Mouse is released
   if(Input.GetMouseButtonUp(0))
    {
        ScoreScript.scoreValue += 1/6f;
        selected = false;
        //Ignore these:
        // Vector3 position = transform.position;
        // position[2] = 0;
        // transform.position = position;


        //This is where I think I should check for overlap
    }

}

void OnMouseOver() {
    if(Input.GetMouseButtonDown(0)) {
        selected = true;
    }
}
}

【问题讨论】：

标签： c# unity3d

【解决方案1】：

应该可以的：

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

public class ImageScript : MonoBehaviour {

private bool selected;
Vector3 currentPosition;
ImageScript secondImage;
void Update()
{
    if (selected == true)
    {
    Vector2 cursorPos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
    transform.position = new Vector3(cursorPos.x, cursorPos.y, -1.0f);

    } 

//Mouse is released
    if(Input.GetMouseButtonUp(0))
    {
        if (Vector3.Distance(transform.position, secondImage.transform.position) < 1f)
        {
            //Distance to second image is less than 1 on mouse up which makes the both images disappear.

            ScoreScript.scoreValue += 1/6f;
            selected = false;
            Destroy(SecondImage);
            Destroy(this);
        }
        else
        {
            //Distance to second image on mouse up is higher than 1 which resets the position back to original.
            transform.position = currentPosition;
        }
        //Ignore these:
        // Vector3 position = transform.position;
        // position[2] = 0;
        // transform.position = position;


        //This is where I think I should check for overlap
}

}
void OnMouseOver() {
if(Input.GetMouseButtonDown(0)) 
{
    selected = true;
    currentPosition = transform.position;
    }
}

确保将第二张图片的ImageScript 分配给当前一张。

【讨论】：