Finding are of intersecting cross sections.

This is What i want to do:

1. extract contours of a brep closed free form in both x and y axis.

2. Take intersection points and make sufaces of the rectangles formed on surfaces by the perpendicular contour lines.

3. take out the centre points of the surface by the are cammand.

I am having troublewith number 2. Please help. Thankyou.

Attachments:

form contours.JPG, 117 KB

Replies to This Discussion

Permalink Reply by Leonardo Nuevo Arenas on December 31, 2011 at 12:43pm

if i understand this, you are trying to make a waffle construction method right? i thing the problem is your approach, with the curves you should make planar surfaces, then you will be able to find intersections by brep/brep intersection, and i would recommend you to use cylinders as the trimming geometry since it's a regular form and you will just need to control radius, after that apply and intersection between cylinders and planar surfaces and an surface split to cut the intersection, to pick un the piece without the intersections you can use list item.

Permalink Reply by Huzefa Ali on December 31, 2011 at 12:58pm

Thankyou for replying.

I have the waffle. but what i am looking for is the panel surfaces on the waffle with respect to the grid. I need the centre of each surface to apply my panel design.

Permalink Reply by Huzefa Ali on December 31, 2011 at 1:11pm

you can look at the gh file i just attached of how i got the waffle.

Attachments:

waffle final model.gh, 10 KB

Permalink Reply by Leonardo Nuevo Arenas on December 31, 2011 at 1:24pm

i don't really understand what you mean, i opened the gh def, but i don't get what is the final result you are trying to achieve

Permalink Reply by Leonardo Nuevo Arenas on December 31, 2011 at 2:15pm

just guessing you need something like this?

Attachments:

CENTER !.bmp, 2.9 MB
center 2.bmp, 2.9 MB
CENTER 3.bmp, 2.9 MB

Permalink Reply by Huzefa Ali on December 31, 2011 at 8:57pm

YES!

This is it. Can you please tell me how to do it or share the file?

Is it also possible to achieve the each divided surface on the grid?

Permalink Reply by Huzefa Ali on January 1, 2012 at 8:20am

I achieved the points. Thanks to you Loenardo. Had to do little tweaking with the definition to match my waffle. I still can figure out how to get the panels in between. Please can you explain in detail how to do it?

Another problem is that i need to give circles on the panels from the center points. For this i will need point tangents to surface or panel surface tangent vector. need your help again. Thanks again.

Permalink Reply by Yoann Mescam (Systemiq) on January 1, 2012 at 7:26pm

Pretty slow and tested only on a torus.

Attachments:

wafflefinalmodel-Systemiq.gh, 23 KB

Permalink Reply by Huzefa Ali on January 1, 2012 at 8:47pm

Thankyou so much Systemiq. Its exactly what i need. I extracted both the individual panels and points.

I wasted so much of my time on the divide surface component and then taking each of 140 surfaces individually to divide surface nearest to the grid. stupid of me. Thanks again.

Thanks

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