I keep hitting this thread when trying to find a good example of using concat
for a particular task, which i've just figured out, so thought i'd post my
example.

I was wanting to generate a polygon given a start point, and a vector of
offset vectors.  I used the pseudo-code provided above and came up with
this:

--
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That's handy, thanks for sharing.

Note that using 'raw text' causes that bit to not go to the mailing list,
just the forum, unless you tick the 'Message is in HTML Format' box. (bug
with Nabble IMO)

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This is handy for debugging.

numeratePoints(calculatedPoints,every=2,start=1);

module numeratePoints(pointList,every=1,size=2,start=0) {
// every=2 gives even points
// every=2 & start=1 gives odd points
for(i=[start:every:len(pointList)])
translate([pointList[i].x,pointList[i].y,10])
%text(str(i),size=size,halign="center",valign="center");
}

Unless specifically shown otherwise above, my contribution is in the Public Domain; To the extent possible under law, I have waived all copyright and related or neighbouring rights to this work. This work is published globally via the internet. :) Inclusion of works of previous authors is not included in the above.

The TPP is no simple “trade agreement.”  Fight it! http://www.ourfairdeal.org/

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Very cool, thanks for that.

-----Original Message-----
From: Discuss [mailto:discuss-bounces@lists.openscad.org] On Behalf Of MichaelAtOz
Sent: Tuesday, 1 September 2015 3:18 p.m.
To: discuss@lists.openscad.org
Subject: Re: [OpenSCAD] concat() for vectors

This is handy for debugging.

numeratePoints(calculatedPoints,every=2,start=1);

module numeratePoints(pointList,every=1,size=2,start=0) { // every=2 gives even points // every=2 & start=1 gives odd points
for(i=[start:every:len(pointList)])
translate([pointList[i].x,pointList[i].y,10])
%text(str(i),size=size,halign="center",valign="center");
}

Unless specifically shown otherwise above, my contribution is in the Public Domain; To the extent possible under law, I have waived all copyright and related or neighbouring rights to this work. This work is published globally via the internet. :) Inclusion of works of previous authors is not included in the above.

The TPP is no simple “trade agreement.”  Fight it! http://www.ourfairdeal.org/

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OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org

Oops that should be

len(pointList)-1

Unless specifically shown otherwise above, my contribution is in the Public Domain; To the extent possible under law, I have waived all copyright and related or neighbouring rights to this work. This work is published globally via the internet. :) Inclusion of works of previous authors is not included in the above.

The TPP is no simple “trade agreement.”  Fight it! http://www.ourfairdeal.org/

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Hi Chalmes,

Do you have any particular licensing of you contribution? Or public domain?

Michael

Newly minted Admin - PM me if you need anything, or if I've done something stupid...

Unless specifically shown otherwise above, my contribution is in the Public Domain; To the extent possible under law, I have waived all copyright and related or neighbouring rights to this work. This work is published globally via the internet. :)  - Obviously inclusion of works of previous authors is not included in the above.

The TPP is no simple “trade agreement.”  Fight it! http://www.ourfairdeal.org/  time is running out!

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