Get the current x or y co-ordinate of the mouse in relation to the SLUDGE window (or screen if the program is running in full-screen mode); that is, how far across or down the window the mouse cursor is currently positioned, regardless of where the camera is aimed in a scrolling scene.
The functions each returns a number between 0 and the width or height of the window or screen minus 1 (inclusive). 0 represents the very left (in the case of getMouseScreenX) or top (in the case of getMouseScreenY) of the window or screen.
getMouseX and getMouseY
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