two questions for parabola

Hi I have two questions for you :

- how build a parabola like in my rhino file? that is to say with focus and a reference point.

- if you try my ghx you will a facets object, my problem is that I would like a surface and to make it I used a box brep...do you know if it's possible to use a rectangle?

Thank you

Replies to This Discussion

Permalink Reply by Pieter Segeren on April 22, 2011 at 4:13am

Hi Tomtom, I'm not sure what you are after, but I have a parabola for you that just might help, maybe.

Attachments:

parabola_test_PSG.ghx, 181 KB

Permalink Reply by TomTom on April 22, 2011 at 4:56am

no sorry it's not that, I would like to build the parobola with these parameters : focus and one point (will be the end of the parabola, last radius) like with rhino...and with your solution you have coded x^2 step by step.

Permalink Reply by TomTom on April 22, 2011 at 5:56am

I've found a way to build my parabola with controled points. now I will adjust it.

But for my other question, no one have an answer?

Is it possible to make the same things that with my test.ghx but with rectangles and not with boxes?

Because I need a surface and not a volume.

Hope someone could help me ;)

Attachments:

parabola.ghx, 140 KB

Permalink Reply by Chris Tietjen on April 22, 2011 at 6:26am

I'm not sure what you mean when you say you need a surface and not a volume. Your first test.ghx shows a surface. Can you show a sample of what your surface should look like?

Chris

Permalink Reply by TomTom on April 22, 2011 at 6:30am

no, it's not a surface, it's because thickness is 0.1mm but it's a volume.

Permalink Reply by TomTom on April 22, 2011 at 6:29am

Ok but how select interior surfaces? I'm not sure about that...

Permalink Reply by TomTom on April 22, 2011 at 6:36am

with quick look it's difficult to understant but that's good.

thank you ;)

Permalink Reply by TomTom on April 22, 2011 at 6:40am

I'm not sure to understand. in your ghx there are two differents methods? one with edges and one with an explosion of the box?

which one is better?

and what is the utility of int sliders?