How to overlay a grid of points onto a surface

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Permalink Reply by David Wood on November 4, 2009 at 10:28am

Hi,

There's a great practice definition on pg. 84 of the Grasshopper Primer. With a bit of tweaking it should do exactly what you want.

It works in fact by dividing the surface into the required number of divisions, then at the U V intersections a point can be located.

Its a great exercise to use to start getting familiar with how GH works...

Permalink Reply by Axiom on November 4, 2009 at 1:55pm

Thanks for the advice. I have had a go with the practice file which is great as it gives me the grid.

The only thing is that it gives me the (x,y,z) values linked to the corners of each surface. Is there a way to take this list and sort it so that it dosen't organise the points into the corners of a surface? In other words, can I just get a list of all the points and there (x,y,z) values?

Thanks again for your help.

Permalink Reply by David Wood on November 5, 2009 at 6:07am

Hi,

Sorry for the slow reply...

Is this the sort of thing you mean? It's a basic read-out of the XYZ co-ordinates of each point on the surface, but you could probably add a way of listing all the points so that you could visually see which point's data you were looking at...

Hope its of some help.

David.

Attachments:

• POINT VALUES.3dm, 167 KB
• POINT VALUES.ghx, 93 KB

Permalink Reply by Axiom on November 6, 2009 at 8:46am

Hi,

Thanks so much for putting that GH file together and sorry for the late reply.

I am having some problems inputting the data into a function F(x) as it keeps going red (is the data not suitable to be used in functions?), but I realize this is maybe for a different discussion.

Thanks again for talking the time to help.