3-D folks, Mathematicians, and Artists: Trying to create my own Trompe-l'œil / forced perspective illusionary image to hang on my wall (e.g. the awesome parking garage signage everyone's already seen... more examples here, and here). I'm having trouble faking it with 2-D programs, and the math is puzzling me. [more inside]
posted by jjjjjjjijjjjjjj on Jan 9, 2009 - 34 answers

3D Trig question: I have a 2D square in 3D space (a Face). I know the positions of the four corner vertices in form x,y,z. How do I calculate the rotation in degrees (Euler angles) as relative from the center of the face? I want to end up with degrees of rotations around x-axis,y-axis,z-axis. Bonus if you can write it in pseudocode.
posted by pooya on May 9, 2007 - 7 answers

How can I work out if a point x,y,z is contained by a cone ? [more inside]
posted by matholio on Jan 14, 2007 - 15 answers

Vector Geometry Filter: I'm working in matlab and need to transform a surface to match an arbitrary angle. I have the unit vector of the new normal (and the original normal is in the Z axis (0 0 1))...however i'm not sure how to rotate one normal to another (i know, i know, it sounds very simple really...) [more inside]
posted by NGnerd on Oct 23, 2006 - 5 answers

Do you know of any 3D interactive geometry software? I would like to have the power of Cabri / Geometer's Sketchpad in 3D.
posted by MzB on Feb 3, 2004 - 0 answers