Hello,
I've written a simple bit of lingo that uses pairs of points (co-ordinates)
to draw 8 lines onto a blank cast member "canvas." The lines will all
connect into a closed polygon. The pairs of points are extracted from a
list. called glistOfPointsCatA
For starters I had:
member("canvas").image.draw(getAt(glistOfPointsCatA, 1),
getAt(glistOfPointsCatA, 2), [#shapeType:#line, #lineSize:2, #color:
rgb(150, 0, 0)])
member("canvas").image.draw(getAt(glistOfPointsCatA, 2),
getAt(glistOfPointsCatA, 3), [#shapeType:#line, #lineSize:2, #color:
rgb(150, 0, 0)])
member("canvas").image.draw(getAt(glistOfPointsCatA, 3),
getAt(glistOfPointsCatA, 4), [#shapeType:#line, #lineSize:2, #color:
rgb(150, 0, 0)])
member("canvas").image.draw(getAt(glistOfPointsCatA, 4),
getAt(glistOfPointsCatA, 5), [#shapeType:#line, #lineSize:2, #color:
rgb(150, 0, 0)])
member("canvas").image.draw(getAt(glistOfPointsCatA, 5),
getAt(glistOfPointsCatA, 6), [#shapeType:#line, #lineSize:2, #color:
rgb(150, 0, 0)])
member("canvas").image.draw(getAt(glistOfPointsCatA, 6),
getAt(glistOfPointsCatA, 7), [#shapeType:#line, #lineSize:2, #color:
rgb(150, 0, 0)])
member("canvas").image.draw(getAt(glistOfPointsCatA, 7),
getAt(glistOfPointsCatA, 8), [#shapeType:#line, #lineSize:2, #color:
rgb(150, 0, 0)])
--complete circle/polygon
member("canvas").image.draw(getAt(glistOfPointsCatA, 8),
getAt(glistOfPointsCatA, 1), [#shapeType:#line, #lineSize:2, #color:
rgb(150, 0, 0)])
This works fine, but I'd like to condense it.
So I've been trying the following:
repeat with i = 1 to 8
member("canvas").image.draw(getAt(glistOfPointsCatA, i),
getAt(glistOfPointsCatA, i+1), [#shapeType:#line, #lineSize:2, #color:
rgb(150, 0, 0)])
end repeat
(Will come to the last 'complete circle/polygon' later).
It almost works (I see the results on screen for a second) then I get the
error: "List expected".
After testing, it seems the i variable is OK to use on its own, but not as
i+1
Even substituting i+1 for something like j where j =i+1 doesn't work.
I feel close but no cigar.
Any thoughts would be appreciated.
Neil
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