Another surface that i would like to try

Hello,

I am trying to replicate this skin for a project that i am doing...basically its a surface that grows from horizontal plane and continues to transform in the vertical plane. Please let me know if anyone has an idea on how to accomplish this. Oh yea, I am still a beginner.

Replies to This Discussion

Permalink Reply by Jeremy J on September 19, 2011 at 10:57am

Permalink Reply by Michael Pryor on September 19, 2011 at 11:58am

I have achieved a similar effect before, It all depends on the start geometry and the way in which you divide. http://www.grasshopper3d.com/photo/pringle-gills?context=user

Permalink Reply by kleerkoat on September 20, 2011 at 11:09am

that's really cool! you've got some other far out pics in there too!

Permalink Reply by Arthur Mamou-Mani on September 19, 2011 at 11:56am

This is interesting Jeremy!

Here is how I do:

1) I would model the shape on Rhino if you haven't already ? Please post it here if you did, it would make it easier to help.

2)I would divide the surface using a method similar to this one. The idea is to create curves following a base surface. This p[art will probably show you how to use lists. This might be confusing, use "param viewer" or Panels to see what is happening to your lists.

3) Instead of connecting the points with a polyline, I would use an "interpolated curve". Also Instead of connecting the points directly to the interpolated curve I would create a line SDL (start direction length) from every point and use the end point to define the curve (this will make sense at 4). The direction would be "unit Z" as the push only happens in height.

4)After that, I would play with an "attractor curve" to modify the length of the base lines.

Have a look at this definition for that, instead of changing the radius of the circle I would us the curve to "push" the points like on your image.

5)Finally, I would place new lines SDL at each point and use "Closest Point on surface" and "Evaluate Surface at Point" to find the p[perpendicular direction to the surface at each point...

6) I would loft all the lines :)

I hope this makes sense. Please let me know, I will try to help in a more visual way.

Permalink Reply by Manuel on September 20, 2011 at 10:36am