Select Primitives(Faces) by Angle

[saca]

hi,

I want to select Primitives(Faces) by the angle of  selected primitives.

You can see this useful  function on 3dsMax Polygon modeling.

if you select some Primitives(polygons), other neighbor Primitives are selected by the selected Primitive angle.

thanks.

[Juraj]

Hi, check Group SOP, you can specify normal direction there and it will add polygons with similar normal to the group.

[saca]

thanks Juraj,

Group SOP is Very useful.

but i want to select primitives by angle from selected Primitive(s).

example; picture below, i want to Select Primitive 24-30 by angle from Primitive 30.(not pattern 24- 30, the reason my scene is build by very compｌex geometry.)

(If you can, the primitive 30 is selected by mouse operation.)

 

3dsMax select by angle "Planar threshold".

 

Edited September 13, 2016 by saca

[Juraj]

Looks like interesting VEX excercise  

Check attached file.

jt_group_by_angle.hipnc

[saca]

thanks, your kindness.

if "Block End>PieceAttribute:name" check off, this function work well.
Poly-Extrud SOP is used for my test.

I'm new to houdini and wrangle, i need to study houdini more.
 

[vinyvince]

On 12/09/2016 at 11:49 AM, Juraj said:

Hi, check Group SOP, you can specify normal direction there and it will add polygons with similar normal to the group.

The problem i found with the group soup is it doesn't seem to take care of your custom normal. I modify my normal using box Hexplanar mapping masks and i wanted to extract group using these normals. Thr group sop will not allow you to do this.

You have to write yours

 

________________________________________________________________

Vincent Thomas   (VFX and Art since 1998)
Senior Env and Lighting  artist & Houdini generalist & Creative Concepts
 http://fr.linkedin.com/in/vincentthomas