background_x[0...7]
Returns: Real
This variable array returns the x position within the room of
any one of the 8 backgrounds (numbered form 0 - 7 within the array)
of the current room. You can use this variable to position
backgrounds at specific places within a room, even when the
background being used is also tiled vertically or horizontally (in
which case the whole "sheet" of tiled backgrounds will be
moved).
background_x[0] = view_xview[0];
background_y[0] = view_yview[0]-50;
background_x[1] = view_xview[0]/2;
background_y[1] = view_yview[0]/2+335;
background_x[2] = view_xview[0]/8;
background_y[2] = view_yview[0]/8+500;
The above code changes the x and y values of three backgrounds in a room based on the position of the view (this effect is called parallax scrolling).