>Can anyone tell me if this kind of thing is possible:
>
>-- ie work out distance to cover in x and y
>on globalToLocal pt, cr
> return [#xx:(pt[#xx]-cr[#xx]), #yy:(pt[#yy]-cr[#yy])]
>end
As you probably have it going by now, yes you can do that. You can
also use dot syntax (in a similar way to how it is in ActionScript
and other languages):
on globaltolocal pt,cr
return [#xx: pt.xx - cr.xx, #yy: pt.yy - cr.yy]
end
By the way, property lists may have seemed to be a good idea when you
started this, but you can get at the elements of points easily, and
you can do math on points, lists, and rects too. For example:
pts = [point(10,10),point(20,20),point(15,13)]
put pts
-- [point(10, 10), point(20, 20), point(15, 13)]
pts[2] = pts[2] - point(3,5)
put pts
-- [point(10, 10), point(17, 15), point(15, 13)]
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