Talk About Network



Register and Login
Nick
Password
Register create new account Sign up is FREE and you can post replies, new topics, bookmark posts and more!
Recover lost password


Programming > Logo > Re: [LogoForum]...
Latest [ Topics | Posts ] Archive Post A New Topic Post a Reply
<< Topic < Post Post 1 of 1 Topic 1524 of 1588
Post > Topic >>

Re: [LogoForum] Re: making ovals

by "John St. Clair" <john.stclair@[EMAIL PROTECTED] > Jan 12, 2008 at 12:03 AM

The message below is being cross-posted from the LogoForum.  Please 
reply here at comp.lang.logo and it will be cross-posted back to the 
LogoForum.  The original author of this message is 
pavel@[EMAIL PROTECTED]
 thanks for sending the images. What you've done is actually one of 
the 
methods for making smooth curves by cutting out each vertex.

In 3D graphics this approach is often called "subdivision" and is used 
to smooth surfaces.

Here is a circle produced by subdivision:
http://jgt.akpeters.com/papers/NasriFarin01/FullCircle-d012.jpg

And here is subdivision in 3D:
http://plissken.fatalunity.com/tutorials/subdiv/graphics/bild1.jpg
http://www.lomont.org/Software/Graphics/SubdivisionSurfaces/SubdivisionBi
g.png

-Pavel

PS. Starting from a rectangle, a subdivision can produce a variety of 
ellipse-like curves. It can produce curves which are something between 
rectangle and ellipse (you have to change 0.428...)

__._,_.___
LogoForum messages are archived at: 
http://groups.yahoo.com/group/LogoForum




 1 Posts in Topic:
Re: [LogoForum] Re: making ovals
"John St. Clair"  2008-01-12 00:03:23 

Post A Reply:
  Go here to Signup

AddThis Feed Button


About - Advertising - Contact - Frequently Asked Questions - Privacy Policy - Terms of Use - Signup

Contact
tan12V112 Tue May 13 23:26:01 CDT 2008.