我要评论1. 使用raycast
如果你的图片是在ui canvas上，可以使用raycast来检测鼠标点击是否在图片上。
using unityengine;
using unityengine.eventsystems;
using unityengine.ui;
public class imageclickchecker : monobehaviour
{
public image targetimage;
void update()
{
if (input.getmousebuttondown(0))
{
if (ispointeroveruiobject(targetimage.gameobject))
{
debug.log("mouse is over the image!");
}
else
{
debug.log("mouse is not over the image.");
}
}
}
private bool ispointeroveruiobject(gameobject target)
{
pointereventdata pointereventdata = new pointereventdata(eventsystem.current);
pointereventdata.position = input.mouseposition;
list<raycastresult> results = new list<raycastresult>();
eventsystem.current.raycastall(pointereventdata, results);
foreach (raycastresult result in results)
{
if (result.gameobject == target)
{
return true;
}
}
return false;
}
}
2. 使用recttransform utility
另外一种方法是直接使用recttransformutility来进行坐标转换和检测。
using unityengine;
using unityengine.ui;
public class imageclickchecker : monobehaviour
{
public image targetimage;
void update()
{
if (input.getmousebuttondown(0))
{
if (ismouseoverimage(targetimage))
{
debug.log("mouse is over the image!");
}
else
{
debug.log("mouse is not over the image.");
}
}
}
private bool ismouseoverimage(image image)
{
recttransform recttransform = image.getcomponent<recttransform>();
vector2 localmouseposition = recttransformutility.screenpointtolocalpointinrectangle(
recttransform, input.mouseposition, null, out vector2 localpoint);
return recttransform.rect.contains(localpoint);
}
}
3. 使用collider和physics raycast
如果你的图片是3d对象，使用collider和physics raycast可以更容易实现。
using unityengine;
public class imageclickchecker : monobehaviour
{
void update()
{
if (input.getmousebuttondown(0))
{
ray ray = camera.main.screenpointtoray(input.mouseposition);
raycasthit hit;
if (physics.raycast(ray, out hit))
{
if (hit.collider != null && hit.collider.gameobject == this.gameobject)
{
debug.log("mouse is over the image!");
}
else
{
debug.log("mouse is not over the image.");
}
}
}
}
}
根据你的具体需求，选择适合的检测方法。如果你的图片在canvas上，推荐使用第一种或第二种方法；如果你的图片是3d对象，推荐使用第三种方法。
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