Hello! Need help with connecting points to create a space frame, final step of the process (irregular surface)

by Jsalit

Mar 26, 2017

Hi guys, first of all Im very new to grashopper and rhino so please bear with me.

I've managed to create a surface in Rhino and wanted to create a pyramidal space frame under/over it. I've attached a rhino file of the surface (just note I turned off the layer of the surface, so rhino graphics don't overlap with the grashopper graphics)

Then i made this grashopper code to generate the needed points

My problem at the moment is that i cannot figure out how to correctly sortout the points or data in order to correctly connect them into a space frame with polylines and lines.

I really would appreciate any kind of advice or help, no matter how small , im banging my head against the wall here. If you think im doing soemthing totally wrong i would highly appreciate if you could point towards any kind of mistakes in reasoning.

It all appears just a few components away. Im sure someone out there has an idea how to do it. I watched a number of tutorials on how to make a space frame over a regular surface and the methods  used there to create those lines, but i haven't managed to translate it to my situation

Looking forward for anykind of input/advice/help, thank you in advance!

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    Joseph Oster

    I'm not a "mesh guy" so I would do it like this:

    The 'Tree/List Viewer' is only a visualization tool to see the columns and rows of projected points, not part of the model.  Connect 'Flip' to 'Pt' to see rows vs. columns.  The 'Project I (Index)' output tells you whether or not any given point intersects the surface.

    What you do with the points to create a space frame is up to you!  Some culling of alternate points, perhaps?  Then moving them up/down in the 'Z' direction?  Or surface normal, if that's what you prefer.

    1

    Mar 26, 2017

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      Joseph Oster

      Using the points from the previous post, here is a rather brute force way to define a framework of points above and below the surface.  It has XZ and YZ diagonals but is missing XY diagonals - and with more clever mapping, could likely be done with fewer components.

      4

      Mar 26, 2017

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        Hyungsoo Kim

        Hi.

        This one is a typical way of creating space frames using subsurfaces.

        Perhaps the most simplest way is using "Relative Items" component but  may be more difficult to understand to you.

        1

        Mar 26, 2017