Unity C＃Raycast鼠标点击 [英] Unity C# Raycast Mouse Click

问题描述

我已经花了一整天的时间研究光从Unity C＃Raycasting，我没有什么可以展示它。我已经学习了教程，在线资源，堆栈溢出问题，甚至有字复制脚本，希望Unity将最终认识到我实际使用Raycast的所有尝试。下面是一个使用Raycast的脚本示例，它对我来说不起作用：

I have literally spent all day researching the light out of Unity C# Raycasting and I have nothing to show for it. I have studied tutorials, online resources, stack overflow questions, and have even word for word copied script in hopes that Unity would finally recognize all my attempts to actually use a Raycast. Here is an example of a script using Raycast that simply won't work for me:

if (mouseDown) {
    print ("mouse is down");
    Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
    RaycastHit hit;
    if (Physics.Raycast(ray, out hit)) {
        print ("response???");
    }
}

我觉得这应该可以工作...但它不。 mouseDown正在工作，因为它应该，但当我点击我的对象，它拒绝承认从我的鼠标位置到对象的rayhit。我还应该提到，该项目是在2D。任何建议？

I feel like this should work... but it's not. The mouseDown is working as it should but when I click on my object it refuses to acknowledge the rayhit from my mouse position to the object. I should also mention that the project is in 2D. Any suggestions?

推荐答案

1 。如果您要检测的对象是 Image / Canvas ，那么这不是怎么做的。要使用Image / Canvas检测触摸，您必须从 IPointerDownHandler 或 IPointerClickHandler 派生，然后从中实现函数。

1.If the Object you are trying to detect touch with is an Image/Canvas, then this is not how to do this. To detect touch with Image/Canvas, you use have to derive from IPointerDownHandler or IPointerClickHandler then implement the functions from them.

public class YourClass : MonoBehaviour,IPointerDownHandler,IPointerClickHandler
{
   public void OnPointerClick(PointerEventData eventData)
   {
      Debug.Log("Clicked");
   }

   public void OnPointerDown(PointerEventData eventData)
   {
      Debug.Log("Down");
   }

}

2 。现在如果GameObject你想要检测的触摸只是一个2D纹理或Sprite，然后使用下面的代码：

2.Now if the GameObject you want to detect the touch with is just a 2D Texture or Sprite then use the code below:

if (Input.GetMouseButtonDown(0))
{
    Vector2 cubeRay = Camera.main.ScreenToWorldPoint(Input.mousePosition);
    RaycastHit2D cubeHit = Physics2D.Raycast(cubeRay, Vector2.zero);

    if (cubeHit)
    {
        Debug.Log("We hit " + cubeHit.collider.name);
    }
}

$ c> Collider2D 添加到2D纹理或Sprite。确保碰撞器通过重新调整碰撞器的大小来覆盖2D纹理或Sprite。由于这是一个2D游戏，您使用的任何 collider 必须以 2D 结尾。例如，有一个 Box Collider ，并且有一个 Box Collider 2D 。您必须附加 Box Collider 2D 。到精灵/纹理。

For this to work, you must attach Collider2D to the 2D Texture or Sprite. Make sure that the Collider is covering the 2D Texture or Sprite by re-sizing the collider. Since this is a 2D game, any collider you are using must end with 2D.For example, there is a Box Collider and there is a Box Collider 2D. You must attach Box Collider 2D. to the Sprite/Texture.

3 。如果＃2 无法使用，那么您的项目已创建为 / strong>，而不是 2D 。删除项目，创建一个新项目，并确保您选择2D这一次。 ＃2 现在只要一个2D 对撞机附在它上面，它就可以工作。

3.If #2 did not work, then your project was created as a 3D instead of 2D. Delete the project, create a new Project and make sure you choose 2D this time. #2 answer should now work as long as a 2D collider is attached to it.

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