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[REBOL] Re: ANN: Planetary defense

From: carl:cybercraft at: 9-Sep-2002 1:18

On 08-Sep-02, Andrew Martin wrote:
> This one works better: > ; Needed until very latest versions of Rebol are released. > if not value? 'as-pair [ > as-pair: func [ > "Combine X and Y values into a pair." > x [number!] y [number!] > ][ > to-pair reduce [to-integer x to-integer y] > ] > ]
Thanks Andrew, though there was a fixed version of the game put out. I'd seen as-pair mentioned before, but I couldn't quite remember what it did. A useful function I stumbled across recently was within? ...
>> ? within?
USAGE: WITHIN? point offset size DESCRIPTION: Return TRUE if the point is within the rectangle bounds. WITHIN? is a function value. ARGUMENTS: point -- XY position (Type: pair) offset -- Offset of area (Type: pair) size -- Size of area (Type: pair) Don't know how well it's known though, so I thought I'd mention it. -- Carl Read