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Test commands

The center.posn command returns TRUE if the screen coordinates of the screen object's bottom center pixel is within a specified region.


center.posn(obj oA, byt X1, byt Y1, byt X2, byt Y2)


Test commands are only valid in an if statement.

The region to be tested is bounded by (X1, Y1) - (X2, Y2).

The position test commands (posn, center.posn, right.posn, and are used to determine if a screen object's position is within a certain area.


 if (center.posn(o1, 0, 120, 60, 130)) {
   print("the object's lower center pixel is in the box");

Technical Information

Required interpreter version Available in all AGI versions
Bytecode value 17 (0x11 hex)

See Also