Creating an octagon from a grid

Forums Technical Discussion Creating an octagon from a grid

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Bennell: Member; 75 posts; Joined: Dec. 2017; Offline

Aug. 23, 2018 10:56 a.m.

I'm new to Houdini and I want to create an octagon for use as a primitive. How can I create an octagon from a grid?


goldfarb: Staff; 3455 posts; Joined: July 2005; Offline

Aug. 23, 2018 11:52 a.m.

do you want to make an octagon or do you want to make a grid of octagons?
you can take a circle SOP, polygons, Divisions = 8
to get an octagon
but Octagons will NOT tile, this is the best you'll get:

Edited by goldfarb - Aug. 23, 2018 11:52:41

Michael Goldfarb | www.odforce.net
Training Lead
SideFX
www.sidefx.com


jsmack: Member; 7737 posts; Joined: Sept. 2011; Offline

Aug. 23, 2018 12:14 p.m.

You're not thinking hyperbolically:


Bennell: Member; 75 posts; Joined: Dec. 2017; Offline

Aug. 23, 2018 12:57 p.m.

goldfarb
do you want to make an octagon or do you want to make a grid of octagons?
you can take a circle SOP, polygons, Divisions = 8
to get an octagon
but Octagons will NOT tile, this is the best you'll get:

An individual octagon.


malexander: Staff; 5156 posts; Joined: July 2005; Offline

Aug. 23, 2018 1:59 p.m.

You can boolean a 2x2 grid with a 45' rotated copy of itself. Grid > Boolean input #1, Grid > Transform (ry=45) > Boolean input #2.

Edit: Or just Circle SOP, Polygon, 8 divisions - though it's not as nicely aligned.

Edited by malexander - Aug. 23, 2018 14:01:56


Bennell: Member; 75 posts; Joined: Dec. 2017; Offline

Aug. 23, 2018 2:21 p.m.

twod
You can boolean a 2x2 grid with a 45' rotated copy of itself. Grid > Boolean input #1, Grid > Transform (ry=45) > Boolean input #2.

Edit: Or just Circle SOP, Polygon, 8 divisions - though it's not as nicely aligned.

What about a octagon with subdivisions like this one.

Edited by Bennell - Aug. 23, 2018 14:22:16

Attachments:
Octagon.JPG (54.6 KB)


goldfarb: Staff; 3455 posts; Joined: July 2005; Offline

Aug. 23, 2018 5:34 p.m.

try this

Attachments:
octagon.0.hip (70.2 KB)

Michael Goldfarb | www.odforce.net
Training Lead
SideFX
www.sidefx.com


jsmack: Member; 7737 posts; Joined: Sept. 2011; Offline

Aug. 23, 2018 5:40 p.m.

A tube?


Bennell: Member; 75 posts; Joined: Dec. 2017; Offline

Aug. 23, 2018 6:56 p.m.

goldfarb
try this

Thanks.

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