# Gimbals, quaternions, and manual rotation

**URL:** <https://discourse.processing.org/t/gimbals-quaternions-and-manual-rotation/17065>\
**Category:** Coding Questions\
**Created:** [January 13, 2020, 10:14am UTC](https://discourse.processing.org/t/gimbals-quaternions-and-manual-rotation/17065 "2020-01-13T10:14:06Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![behreajj](https://avatars.discourse-cdn.com/v4/letter/b/b5a626/32.png) [@behreajj](https://discourse.processing.org/u/behreajj)\
**Post date:** [January 13, 2020, 11:05am UTC](https://discourse.processing.org/t/gimbals-quaternions-and-manual-rotation/17065/2 "2020-01-13T11:05:51Z")

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Hi @paulstgeorge ,

This thread [3D Rotations: Rotating around the screen axes](https://discourse.processing.org/t/3d-rotations-rotating-around-the-screen-axes/14239) may be a place to start. (The code discussed there doesn’t actually use any ‘picking’ function to see if the mouse has selected the 3D shape with a ray, which is a separate task from rotation.)

Best,  
Jeremy

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