Unity3d controls the moving range of the mouse

In some forums, someone asked how to control the mouse's moving range in unity. There are two methods: one is to call the clipcursor function of user32.dll in windows.

Another method is to use the cursor. setcursor function.

Here we will introduce the first method.Code

 

[Dllimport ("user32.dll", charset = charset. Auto, exactspelling = true)]

[Return: financialas (unmanagedtype. bool)]

Public static extern bool clipcursor (ref rect rcclip );

[Dllimport ("user32.dll")]

[Return: financialas (unmanagedtype. bool)]

Public static extern bool getclipcursor (Out rect rcclip );

[Dllimport ("user32.dll")]

Static extern int getforegroundwindow ();

[Dllimport ("user32.dll")]

[Return: financialas (unmanagedtype. bool)]

Static extern bool getwindowrect (INT hwnd, ref rect lprect );

 

[Structlayout (layoutkind. Sequential)]

Public struct rect

{

Public int left;

Public int top;

Public int right;

Public int bottom;

Public rect (INT left, int top, int right, int bottom)

{

Left = left;

Top = top;

Right = right;

Bottom = bottom;

}

}

 

Rect currentclippingrect;

Rect originalclippingrect = new rect ();

 

Void start ()

{

Hndl = getforegroundwindow ();

Getwindowrect (hndl, ref currentclippingrect );

Getclipcursor (Out originalclippingrect );

Clipcursor (ref currentclippingrect );

}

 

Void onapplicationquit ()

{

Clipcursor (ref originalclippingrect );

}