Not sure how to make the shape() function do the "obvious" thing. use <sweep.scad> function f(t) = [ (t / 1.5 + 0.5) * 10 * cos(1.5 * 360 * t), (t / 1.5 + 0.5) * 10 * sin(1.5 * 360 * t), 100 * (1 - t) ]; function shape() = [ for (a = [0:15]) (a%2 == 0) ? [5*sin(a * 45/2), 5*sin(a * 45/2] : [10*sin(a * 45/2), 10*sin(a * 45/2]; ] /* [ [ 0, 10], [ 0, 10], [10, 10], [10, 0] ]; */ /* [ [-10, -1], [-10, 6], [ -7, 6], [ -7, 1], [ 7, 1], [ 7, 6], [ 10, 6], [ 10, -1]]; */ step = 0.005; path = [for (t=[0:step:1-step]) f(t)]; path_transforms = construct_transform_path(path); sweep(shape(), path_transforms);

On 12/13/2015 01:37 PM, jon wrote: > Not sure how to make the shape() function do the "obvious" thing. > Um, why not explain what you are trying to do? While I'm motivated to help, I'm not going to reverse engineer the code trying to guess what the target is... ciao, Torsten.

I was trying to get the loop to emit a series of 16 [x,y] positions to create the shape. The details of exactly which points are where is probably irrelevant. Does that help? On 12/13/2015 7:44 AM, Torsten Paul wrote: > On 12/13/2015 01:37 PM, jon wrote: >> Not sure how to make the shape() function do the "obvious" thing. >> > Um, why not explain what you are trying to do? > > While I'm motivated to help, I'm not going to reverse engineer the > code trying to guess what the target is... > > ciao, > Torsten. > > > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org > > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2016.0.7294 / Virus Database: 4483/11165 - Release Date: 12/12/15 > >

On 12/13/2015 01:55 PM, jon wrote: > I was trying to get the loop to emit a series of 16 [x,y] positions to > create the shape. The details of exactly which points are where is > probably irrelevant. > Like so for an ellipse?: function shape() = [ for (a = [0 : 35]) [ 5 * sin(a * 10), 8 * cos(a * 10) ] ]; // easy way to test just the shape :-) polygon(shape()); ----- Or to show the separate things going on in more detail: function x(a) = (10 + sin(a * 10)) * sin(a); function y(a) = (10 + sin(a * 10)) * cos(a); function point(a) = [ x(a), y(a) ]; function shape() = [ for (a = [0 : 359]) point(a) ]; polygon(shape()); ciao, Torsten.

Thanks. Those examples helped a lot in getting the syntax tweaked! On 12/13/2015 8:07 AM, Torsten Paul wrote: > On 12/13/2015 01:55 PM, jon wrote: >> I was trying to get the loop to emit a series of 16 [x,y] positions to >> create the shape. The details of exactly which points are where is >> probably irrelevant. >> > Like so for an ellipse?: > > function shape() = [ for (a = [0 : 35]) [ 5 * sin(a * 10), 8 * cos(a * 10) ] ]; > > // easy way to test just the shape :-) > polygon(shape()); > > ----- > > Or to show the separate things going on in more detail: > > function x(a) = (10 + sin(a * 10)) * sin(a); > > function y(a) = (10 + sin(a * 10)) * cos(a); > > function point(a) = [ x(a), y(a) ]; > > function shape() = [ for (a = [0 : 359]) point(a) ]; > > polygon(shape()); > > ciao, > Torsten. > > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org > > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2016.0.7294 / Virus Database: 4483/11165 - Release Date: 12/12/15 > >