poly boolean error

Become a member of the CGSociety

Connect, Share, and Learn with our Large Growing CG Art Community. It's Free!

THREAD CLOSED
 
Thread Tools Search this Thread Display Modes
Old 10 October 2006   #1
poly boolean error

i did this boolean DIFFERENCE, between the cilinder and the sphere, but i can fix why does this lines appear ( the blue ones), more detail or subdivision the cilinder has more stressed lines appear, could some one explain me why is this happening and what i should do to it correctly?


many thanks
 
Old 10 October 2006   #2
Couldn't it be that all the different Booleans affect each other?
In that case it would be better to just Boolean a single segment and then duplicate and merge to make the entire structure.
Also I have found that sometimes the points of a sharp corner will not be attached to another point with an edge (at least not all around). In that case you also got stretch lines and even holes when subdividing. But that is easily countered by adding edges to properly connect it to other points.

Greetings

Erwin
 
Old 10 October 2006   #3
Boleans are often messy, especially with precise, hard shapes. In this case I would be tempted to make one clean bolean segment (maybe even using 2 splines and make a surface mesh) and then copy-rotate the whole thing x times.
 
Old 10 October 2006   #4
thanks for the answers guys but as far i understand you said that i should do one sphere-cylinder boolean operation and then rotate de cylinder and do it over and over, im ok with that the problem is that in the picture i didnt apply more than one boolean operation so if its just one what happened that? , im going to try to the boolean with one of the sphere pole i mean the last vertice outside of the boolean, what i said do the boolean with a side of the sphere. if you have another idea let me know please...
thanks anyway
 
Old 10 October 2006   #5
jp

thanks for the answers guys but as far i understand you said that i should do one sphere-cylinder boolean operation and then rotate de cylinder and do it over and over, im ok with that the problem is that in the picture i didnt apply more than one boolean operation so if its just one what happened that? , im going to try to the boolean with one of the sphere pole i mean the last vertice outside of the boolean, what i said do the boolean with a side of the sphere. if you have another idea let me know please...
thanks anyway
 
Old 10 October 2006   #6
jp

even if i rotate the pole of the sphere im going to obatain the same result as before, why boolean operation are so complicated in xsi i can remember in maya wasnt that much, exist any other solution to carve 24 smooth holes y that cylinder?

thank you
 
Old 10 October 2006   #7
I believe they advised to cut up the original cylinder mesh before the boolean operation. Then duplicate & rotate that section, until you have a complete cylinder again.

In this way, if there is a polygonal mess, you have far less cleaning up to do initially.
 
Old 10 October 2006   #8
Thread automatically closed

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.
__________________
CGTalk Policy/Legalities
Note that as CGTalk Members, you agree to the terms and conditions of using this website.
 
Thread Closed share thread



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
CGSociety
Society of Digital Artists
www.cgsociety.org

Powered by vBulletin
Copyright 2000 - 2006,
Jelsoft Enterprises Ltd.
Minimize Ads
Forum Jump
Miscellaneous

All times are GMT. The time now is 06:49 AM.


Powered by vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.