3 Dimensional Cracking

Hi Everyone,

I'm looking to recreate a two dimensional cracking technique from python script into grasshopper, whilst also transferring it to 3D. It's relatively simple, drawing a line between the centre of the (in 2D case - closed polyline) the extremities, and then sub dividing and repeating.

I've started this off in 3D by creating a box, finding the centriod and then creating lines between the centroid and exterior vertices. Ideally I then want to create these "triangles" into surfaces, find the centre point of all of those, and then repeat (even better would be to somehow have the repeat count on a slider of some sort)

I'm attaching a couple of screen shots to help explain what I'm trying to achieve, would be very grateful if anyone had any suggestions, also included the grasshopper file, though I apologise in advance for how messy it is!

Attachments:

3d subdivision.gh, 20 KB

Replies to This Discussion

Permalink Reply by Holly Cooper on March 14, 2017 at 9:54am

Hi Peter,

That looks great thanks! Really appreciate you getting back to me so quickly. This w/e is perfect for a fully functioning version, an chance I could get the WIP one just to continue experimenting with until then?

Thanks again,

Permalink Reply by Holly Cooper on March 15, 2017 at 4:07am

Just realised I can use the screenshot of the script to update it myself for the time being! :)

Had a complete mind blank!

Permalink Reply by Holly Cooper on March 15, 2017 at 4:25am

Retracting the pervious comment - I cant find the correct position to insert the script so my tutors will have to wait until the weekend!

Permalink Reply by peter fotiadis on March 15, 2017 at 1:46pm

... tutors will have to wait ...

Well... tutors waiting (I do hope in agony and/or in pain and/or in frustration) sounds a very good thing to me since I don't like tutors.

Anyway get this renamed version since something urgent occurred in the practice and bad/unpleasant/ugly things are scheduled for the w/e.

Attachments:

Recursively_BoxBrepTrim_V1.3dm, 384 KB
Recursively_BoxBrepTrim_V1.gh, 134 KB

Permalink Reply by Ron Wassmer on March 30, 2017 at 10:48am

Hey all!

I am trying to do something similar, by "cracking" a volume and using the edges as a facade treatment. I cant get the userbrep functionality to work for some reason.

Attachments:

user brep not working.JPG, 131 KB

Permalink Reply by peter fotiadis on March 30, 2017 at 10:55am

Hi Ron

What's the issue with the userBrep? (it works if useUserBrep == true AND there's some input brep around that is closed AND sliceMode == 2).

BTW: sliceMode 2 does the "random" (slow) slicing. The orthogonal slice - sliceMode 1 - is restricted to boxes and domains (and that's the reason that is real-time fast).

BTW: this C# is NOT written having facades in mind thus I can't predict what sort of results you'll get. Anyway post your brep (in a Rhino file) and give some hints (sketches) about what "slice" means to you.

Permalink Reply by Ron Wassmer on April 1, 2017 at 10:06am

Peter,

I was able to get the userbrep working fine, but didn't get the results I was looking for, which is fine because it was more of an exploratory measure in the first place.

thanks

Permalink Reply by Phoenix Yang on October 30, 2017 at 8:35pm

Dear all,

I tried to use my own geometry, but failed. Please see the photo attached below.

TYSM.

Best,

Phoenix

Permalink Reply by peter fotiadis on October 31, 2017 at 4:41am

Post here only the geometry used. In all tests here the whole thing works OK

Permalink Reply by Mohamed Naeim on March 14, 2017 at 9:55am

sometimes ago, I managed to create 3D Subdividing definition

It would be useful to explore it if you are not a Scripting fan

https://naeimdesigntechnologies.wordpress.com/2016/12/23/recursive-...

Attachments:

Subdivision 02 - 3D 08.gh, 43 KB

Permalink Reply by Holly Cooper on March 15, 2017 at 4:10am

Hi Mohamed,

Thanks for the reply! I have been working with the script created by Peter for a while now so its part of my architectural "story" as it were, but I'll certainly take a look at this, Thanks!