[cairo] Rotations with Quaternions

cecashon at aol.com cecashon at aol.com
Mon Jan 8 18:43:50 UTC 2018

Hi Cairo Folks,

Would using quaternions for rotation and shear be workable internally in Cairo? It would make for a simplified function for setting up the rotation and shear of a drawing by requiring pitch, roll and yaw parameters. This is something that is visually easier for a programmer to understand even when drawing in 2d.

This is some test code using quaternions with Cairo and GTK. 


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