Cutting holes in a panelized screen

[LizW (Liz)]

I am pretty new to grasshopper am I am trying to create a parametric panelized mesh screen with ciruclar cutouts. I have managed to panalize the curved sruface of the facade and project the circular cutouts onto the panels, however I can’t quite work out how to get the circles to be cut out of the panels?

Also on the edge panels, the circles dont seem to distribute evenly as on the full panels.

Any help would be much appreciated! Thanks!
Screen 2.gh (7.3 KB) Screen 1.3dm (8.6 MB)

[tay.othman (tay.0)]

Hello ,
Cool Facade, your issue is the data tree mismatch, since you are paneling, dividing and sub-dividing, usually generate complex data structure. please find the attached revised GH definition, be careful with surface split since it may take around 1 minute to calculate.
Screen 2.gh (18.0 KB)

[diff-arch]

Welcome @LizW,

Seems like @tay.othman was faster!

I’ve given the panels a thickness and extruded the circles to closed cylinders to subtract them!

Screen 3.gh (14.1 KB)

[Joseph_Oster]

Aligning and lofting multiple shapes in Grasshopper

Some of the complexity in this model could have been avoided had I selected the curves from the Rhino file more judiciously, or treated them as two holed surfaces (below, yellow group). The two duplicate curves may still have caused trouble but that’s a separate issue. [LobbyWall_2021May6a] LobbyWall_2021May6a.gh (1.5 MB) If the entire model (the Voronoi holes) were done in GH instead of Rhino, such organization tends to come naturally.

[LizW (Liz)]

Thanks so much for everyones help x

@diff-arch is there a way to cut/trim the panels you have created so they follow the original shape of the facade I had but filter the holes so the ones that are cut but the edge are not used?

Also if anyone wants another challenge I am now trying to figues out a way to create a gradation in the size of the holes so they get smaller as the get lower to the ground using attractor points/curve…

Thanks again everyone

[Joseph_Oster]

@LizW

Also if anyone wants another challenge I am now trying to figues out a way to create a gradation in the size of the holes so they get smaller as the get lower to the ground using attractor points/curve…

Not a challenge at all. Trivial, no attractor required, just the Z coordinate of the points.

[LizW (Liz)]

Is there a way to filter the circles so they appear staggered?
I assume you would need to filter every second point but do I need to reorganise the list first?

[LizW (Liz)]

how do you scale using the z coordinate?

[Joseph_Oster]

@LizW

how do you scale using the z coordinate?

Z_circles_2021May10a2.gh (9.5 KB)

[diff-arch]

@LizW

@diff-arch is there a way to cut/trim the panels you have created so they follow the original shape of the facade I had but filter the holes so the ones that are cut but the edge are not used?

Yes, seems like I missed that in my original post. Now, I’ve got rid of all the PanellingTools components, because they are not necessary, and even make it more difficult to solve this, because they return too clean data trees.

@LizW

Also if anyone wants another challenge I am now trying to figues out a way to create a gradation in the size of the holes so they get smaller as the get lower to the ground using attractor points/curve…

It’s a little hard to tell what you mean by “staggered”, but I’ve integrated a method using hexagonal grids to distribute the circle centers on the panels. If you want a more random approach, simply substitute it for @Joseph_Oster’s random proposal above.

Seems like all of this was more of a challenge for you than us here.

Screen 4.gh (40.0 KB)

[Joseph_Oster]

@diff-arch

If you want a more random approach, simply substitute it for @Joseph_Oster’s random proposal above.

My post was a quick illustration of how to scale circles based on the Z coordinate of points, not a proposal for using random points instead of a staggered grid.

[Joseph_Oster]

This post answers two of the questions in your DUPLICATE THREAD:

Varied Perforated Screen Help

Hi Everyone. I am quite new to using grasshopper so I was wondering if I could get some help! I have trying to model a perfroated screen facade for a building but I am having a couple issues: I want the pattern of the facade to have staggered circles perforations like the image I have attached. I tried to cull every second point to achieve this but I can’t quite seem to get it to work I want the circles perforations to vary depending on the height. I have tried to do so by using the z value h…

@LizW

• I want the circles perforations to vary depending on the height. I have tried to do so by using the z value however the pattern doesn’t quite seem to be working and it seems to mostly at times vary within a panel rather than across the whole facade
• I also cant quite manage to the the shapes of the panels to follow the curved cutout of the facade… (i want the panels on the edge to follow the curved edge of the overall shape)

Z_circles_2021May11a.gh (46.2 KB)

[Joseph_Oster]

@LizW

Is there a way to filter the circles so they appear staggered?
I assume you would need to filter every second point but do I need to reorganise the list first?

This (white group) implements “staggered rows” by moving them plus or minus the max radius.

Z_circles_2021May11b.gh (59.5 KB)

It takes about 20 seconds. No plugins.