# 12- Parametric Hexagons

In this Paracourse Lesson, we are going to model a series of hexagons which scale based on point attractors. We are also going to study how to fix the cells on the closed Nurbs surface seam.

**35 Minutes**

**213 MB**

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## Comments

## edgar

Attachment

question.jpgI have a problem, if I created a surface in Rhino which had some crown on it and an irregular shape ( I did a square then projected curves and trim it) seem Grasshopper is reading the complete surface and not the trim part, how could I add the edges of the surface?

## parametric

Hi Edgar

Remember that Rhino/Grasshopper is a NURBS modeling software and if you have watched the basics we have explained that a Trimmed surface will be paneled on the untrimmed surface. Grasshopper uses u/v network to make the panels so you should try to make a pure NURBS surface if you want to fit it on the whole surface. You can also trim the overhanging edges.

## technolo-g

Killer lesson, thank you! I noticed that the calculation of area in order to sort the hexagons takes a significant amount of time to complete (almost 30s) on my MBP. Is there any caching mechanism that could be used or any other way to speed up this process? I’m currently just disabling the solver while making a changeset which is less than ideal.

## parametric

Thank you technolo-g

unfortunately, area calculation is a little bit slow… You can always disable the last step for sorting and change the simple hexagon polygons fast and finally enable the last part to get final results