Surface Mesh from a Grid of Points

hey! I was wondering how to make a surface from a grid of points.
I saw this post trying to look for a solution
http://www.grasshopper3d.com/forum/topics/patch-surface-from-points

and I also been trying to follow the AlgorithmicModelling.pdf tutorial for grasshopper. for some reason it is not working take a look of what I ended up with .

I cant figure what I have wrong I follow this tutorial but some parts arent really clear. I am guessing that maybe I have those 1 variable function wrong... I dont know :(

Would you help me out?
Thanks in advance

here is the definition

Attachments:

Points Surface.gh, 16 KB

Replies to This Discussion

Permalink Reply by Francisco Calvo on February 5, 2010 at 1:04pm

Hi, there is a problem with the definition from the manual, you have to put a
"Flatten" component between the "Merge" and the "Duplicate" components.

In your definition, I just replace the SquareGrid component, by a Series + Point
Vectors.

Here are both definition fixed.

PD: Te escribo en ingles para que todos lo entiendan

suerte!

Attachments:

Point surface final.ghx, 214 KB
PointsSurface fixed.ghx, 105 KB

Permalink Reply by Francisco Lara on February 6, 2010 at 10:11am

oh! thats weird!
well you are right I needed to "flatten" the grid of points. But even if I do that, it doesnt work. I was wondering why it works fine with a series of points and it doesnt work with a grid of points here some images

by hte way thanks for the deffinition that you fixed for me it works fine!

Attachments:

PointsSurfaceSomethingWrong.ghx, 144 KB

Permalink Reply by Francisco Calvo on February 6, 2010 at 12:22pm

Ok, the main problem of your definition is that a SquareGrid outputs more points than
a Series + Point.

Both with the same slider input = 8 SquareGrid (9*9=81 pts)......Series+Points
(8*8=64). This is because the SquareGrid takes the (8) for the numbers of "cells".

So you have to modify some ecuations in the definition, adding 1 number to the
SquareGrid.

So here is the definition fixed,

Attachments:

PointsSurfaceSomethingWrong FIXED.ghx, 141 KB

Permalink Reply by Francisco Lara on February 6, 2010 at 12:42pm

Sweeeeeet man!
Thanks... that wasnt a easy task to solve!
Take care
and Nice job

Permalink Reply by Ferdinand Facklam on October 26, 2010 at 9:40am

Thanks for the definition! How can I connect three point (or lines) to a surface?

Permalink Reply by MARIO VERGARA on February 5, 2010 at 1:36pm

hey guys!
nice job francisco!
just curious...
why use a mesh component instead of a srfgrid?
is there an advantage?
i think you can get the same result .....am i wrong??
congrats!
best
m

Permalink Reply by Luis Fraguada on February 6, 2010 at 2:48pm

nurbs surfaces and meshes are quite different...

Permalink Reply by MARIO VERGARA on February 8, 2010 at 9:06am

yes...they are
i just was trying to figure out why use mesh over nurbs?
i was wondering if there is any specific reason......in this particular case....

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