POINT

Function

POINT returns the ‘colour’ of the specified pixel.

Syntax

A = POINT (X,Y)

Example

10 REM Invert the graphics screen
20 FOR X = 0 TO 239
30 FOR Y = 0 TO 63
40 IF POINT(X,Y) = 1 THEN PRESET (X,Y) ELSE PSET (X,Y)
50 NEXT Y:NEXT X

Remarks

An odd number returned by the function indicates a black pixel, while an even number indicates a white pixel. If the co-ordinates are out of range then -1 is returned.