Google Code-in

The objective of this task is fairly straightforward: model a 3D yin yang model that can be animated like one of these: http://brlcad.org/gci/images/gci/task_ideas/yinyang

The more 3D you can make it (instead of flat discs) the better.

Note that you don't have to actually animate your design, but it should intersect correctly (without touching) when rotated. The best way to verify that your design is correct is by applying rotations manually (e.g., rotobj or oed+rot command) or by writing a script that creates the model as needed in different orientations.

Note that the most easy way to apply the correct rotation is to make sure the origin (0,0,0) is at the center of your design. That way a simple rotation matrix will work.

SUBMIT a PNG image of your design along with a .g BRL-CAD database of the model

SUBMIT a write-up describing your model or a script that rotates it