how can houdini judge the corner of the polyline

Forums Technical Discussion how can houdini judge the corner of the polyline

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syzmatrix: Member; 111 posts; Joined: Dec. 2008; Offline

May 8, 2009 12:40 a.m.

hi everyone

Here is a simple question.

can houdini judge the coner points and seperate the polyline into different lines,I just want it to be procedurly.

Attachments:
send.jpg (87.7 KB)


syzmatrix: Member; 111 posts; Joined: Dec. 2008; Offline

May 8, 2009 12:41 a.m.

here is the attached file. :?

Attachments:
ttttt.hip (42.7 KB)


probbins: Member; 1145 posts; Joined: July 2005; Offline

May 8, 2009 10:29 a.m.

I don't suppose a 2nd carve sop is what you are looking for? Using first U to locate the corner and keeping both inside and outside.

I would perhaps be nice if you could identify a specific point on the curve and turn on Breakpoints for that location.

“gravity is not a force, it is a boundary layer”
“everything is coincident”
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syzmatrix: Member; 111 posts; Joined: Dec. 2008; Offline

May 8, 2009 10:50 a.m.

hi probbins
thanks a lot for your reply! I just think about the same thing.
The problem is clear now. How can I find the corner point by houdini:it is really confusing me a lot.


jacob clark: Member; 665 posts; Joined: July 2005; Offline

May 8, 2009 11 a.m.

Use the poly extrude SOP

Find the normal that is not pointed in the same direction as the primitive normal.

Should be good to go!

cheers,
-j


syzmatrix: Member; 111 posts; Joined: Dec. 2008; Offline

May 8, 2009 2:54 p.m.

jacob clark,thanks very much for your reply.

I will try it soon. :wink:


syzmatrix: Member; 111 posts; Joined: Dec. 2008; Offline

May 9, 2009 1:40 a.m.

here is what I get now. The question is more and more approaching its goal. I can find the primtive normal and the point normal. But there is still some problems that I do not know how to put the point normal and the primtive normal together to compare. Hope some nice guy HELPS! :shock:

Attachments:
send.jpg (99.1 KB)


syzmatrix: Member; 111 posts; Joined: Dec. 2008; Offline

May 9, 2009 1:41 a.m.

here is the hip file

Attachments:
ttttt.hip (54.6 KB)


Simon: Member; 2199 posts; Joined: July 2005; Offline

May 9, 2009 7:08 a.m.

could you remove inline points using the facet sop and then the end points the one left is the corner…..

Edited by - May 10, 2009 05:16:45

The trick is finding just the right hammer for every screw


syzmatrix: Member; 111 posts; Joined: Dec. 2008; Offline

May 10, 2009 3:18 a.m.

Thanks very much for you reply, Simon.

I take you method and work it out. It seems to be a good solution for the problem.

It is a part of a much bigger project, and there are still some problems.

Thanks for all the help you offer!

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