|numb||Which mouse button constant to check for.|
This function will return true if the mouse button
being checked has been released or false if it has not.
This function will only be triggered once for any mouse
button when it is released and to trigger it again the button will
need to have been pressed and released again.
speed = point_distance(x, y, mouse_x, mouse_y) / 10;
The above code will check to see if the right mouse button has been released and if it has it will set the speed of the instance to a tenth of the distance between the current x/y position and the mouse x/y position.