How to model multiple craters on a surface

Replies to This Discussion

Permalink Reply by Joseph Oster on November 21, 2017 at 7:38am

Try it on a flat surface first?

1. Randomly placed craters circles (like the moon surface) with random radius?
2. Raise or extrude each circle a random distance?
3. Have the surface conform to the top edges of the circles (this is the tricky part!)
4. Finally, do the same thing on cylinder or whatever curved "closed surface" you have in mind.

Post GH code with steps 1 and 2 (and maybe 4) before tackling the hard part, step #3.

Permalink Reply by Ömer Ayan on November 21, 2017 at 8:31am

I am stuck with the number three (tricky part)..

Attachments:

• craters.gh, 8 KB

Permalink Reply by Joseph Oster on November 21, 2017 at 8:49am

You didn't internalize your 'Crv' parameter so I used a 'PlaneSrf'.  I think you'll need a better distribution of crater circles and heights, with fewer overlaps.

I don't have an answer for you, just suggesting some steps on a path forward.

Permalink Reply by Joseph Oster on November 21, 2017 at 10:05am

Using 'Construct Domain (Dom)' for the 'Random N' input is not correct.

This uses 'SrfGrid', which can be adapted to curved surfaces using surface normal vectors at each point instead of 'Z'.  The slope of the craters can be shaped using a 'Graph Mapper'.

Attachments:

• craters_2017Nov21a.gh, 22 KB

Permalink Reply by Ömer Ayan on November 23, 2017 at 6:01am

Thank you.It is what i need for now.But I believe we can get much better result if we use kangoroo.

Permalink Reply by Joseph Oster on November 23, 2017 at 6:44am

Nothing against Kangaroo but it's possible to "get much better result" without it.  What would be a "much better result"?

Permalink Reply by Ömer Ayan on November 24, 2017 at 5:25am

If i would use the circles as force objects than I could have a clear crater using kangaroo.Because with your definition i am getting this weird shapes as in the jpeg file.The problem is I am just a beginner and don't know how to use kangaroo.

Attachments:

• 1.jpg, 45 KB

Permalink Reply by Joseph Oster on November 24, 2017 at 6:06am

The problem is I am just a beginner

That does limit your options.

Instead of 'SrfGrid', you could try 'Delaunay Mesh' at lower resolution?