Showing posts with label Blender. Show all posts
Showing posts with label Blender. Show all posts

Wednesday, June 6, 2012

Creating An Ellipsoid in a 3D Grapher

When creating an Ellipsoid in a 3D Grapher, whether it be online or Apple's Grapher that comes with Mac, or using a formula inside of a 3D graphics program such as Blenders Add Mesh Math Addon, use this formula.
X function is:   a(cos(u))*cos(v)
Y function is:   b(cos(u))*sin(v)
Z function is:   c(sin(u))

U min: -Pi/2
U max: Pi/2
V min: -Pi
V max: Pi
a = Some number or function greater than 0
same for b and c function, or some constant n.


  • a>b>c — tri-axial or (rarely) scalene ellipsoid;
  • a=b>c — oblate ellipsoid of revolution (oblate spheroid);
  • a=b<c — prolate ellipsoid of revolution (prolate spheroid);
  • a=b=c — the degenerate case of a sphere;

In Apple Grapher I used this:


The 3,2,2 after the [x,y,z] is where you would put the a,b,c if you like.

This took me all day to figure out.  You got it in 2 secs.  Use carefully with beer.

Thursday, June 11, 2009

3DMagix rips of Blender

3DMagix is out to charge for what is already free. 3DMagix is nothing more than Blender 3D repacked, repackaged, and sold for $47.
Blender is free and be found at http://www.blender.org
For more information about the 3DMagix scam read about it here:
http://www.blendernation.com/2009/06/11/3dmagix-re-branding-and-selling-the-free-software-blender/

Blender is the most amazing free 3D software available comparable to other programs costing $3,000.00 and more. I love Blender. I have donated to Blender. I am a Blenderhead.
Long live free Blender.