Trouble with points

Hello fairly new to grasshopper, and I have a quick question for you guys. I'm trying to move all vector points away from the center of the circle say 1mm. I tried pt(pointpolar) but i could only get the points to move in the x y or z, instead of a more offset move. I would also like to alternate each point on the line so the first point moves out 1 mm and the next point moves in -1mm. Any suggestions would be very appreciated. Thank you.

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Permalink Reply by John Gulliford on February 17, 2012 at 2:31pm

this should get you started

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trouble_with_points.gh, 6 KB

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Permalink Reply by Danny Boyes on February 17, 2012 at 2:42pm

Now John its 21:40 here you've only got 20 minutes to brush your teeth and get ready for bed :)

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Permalink Reply by John Gulliford on February 17, 2012 at 2:47pm

haha, well played!

with my def, how would I thread the two lists back so they are numbered like the original list. If I was merging two trees that I culled, they would remember where they belonged and fit nice and tight.

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Permalink Reply by Danny Boyes on February 17, 2012 at 3:52pm

I would use the weave component in this case

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Permalink Reply by Danny Boyes on February 17, 2012 at 2:41pm

This would be my approach:

Create a surface so that you can get the Normals for the direction of movement.

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SolutionWithPoints.gh, 5 KB

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Permalink Reply by Danny Boyes on February 18, 2012 at 12:48am

with all the moved points you can pass them through a Flip Matrix component to change rows to columns etc

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Permalink Reply by Cameron S. Andersen on February 18, 2012 at 10:09am

I'm stunned at how easy that was, I must have messed with this thing for 4 hours trying to connect those points. I think that's the hardest part about grasshopper is not having a quick reference guide. Thanks a lot.

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Permalink Reply by Cameron S. Andersen on February 17, 2012 at 5:48pm

Hey Thanks a lot guys, this is really gonna help. I'm gonna try both of these. I'll let you know how it turns out.

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Permalink Reply by Cameron S. Andersen on February 17, 2012 at 6:34pm

Danny I have a question, when you add the interpolation curve why does it make the curve in the V direction and not the U direction? If I wanted to make another curve in the U direction how do I do that? Thanks

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Permalink Reply by Cameron S. Andersen on February 18, 2012 at 12:28pm

Alright guys I have one more question. I was able to pipe all these new curves within the grasshopper definition, but now I want to create a parametric surface with the sweep and profile curves. I can bake the curves and sweep it within rhino but I would like to do this within grasshopper so the surface will respond to parameters. I've tried the sweep components, loft, and revolve but they don't seem to respond well to the data. Any suggestions?

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SolutionWithPointsWorking.gh, 5 KB
Screen shot 2.jpg, 282 KB

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Permalink Reply by Nay Soe on February 18, 2012 at 12:48pm

Hi Cameron, did you try "flatten." Each of the intCrv should be flatten for it to loft.

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Permalink Reply by Cameron S. Andersen on February 18, 2012 at 2:50pm

Okay So I've noticed something strange within my definition, when I just the V slider on the surface divide, it seems to kink and distort my circle, and also it pipes to surfaces at that spot. Any ideas and or fixes?