Quaternions & Matrices - CG Forge - Quick Tip

For the full course, visit :
www.cgforge.com/course?course...
In this quick tip, we take a look at a practical example which takes advantage of quaternion and matrix (and/or Euler) based rotation.

[@bekabaratashvili3178]

You are the greatest teacher!!!

[@user-hl5zx1qh7s]

thanks for the helpful video

[@requa3314]

super usefullllll thank you :)

[@anarkijex]

ok so how do you show the orient attribute as a marker or gizmo?

[@es_ina]

like any other marker. in the visualization menu, the button in the right side panel of the scene view. the one that looks like the tipical map location icon.

[@ichtreffnixtv8605]

Hi, I'm scaling packed prims in a rbd sim by modifying primintrinsics in a geowrangle: matrix3 trn = ident(); // cannot use primintrinsic(...) because I wouldn't be able to scale over life anymore float scale = chramp("scale_over_life", @nage); setprimintrinsic(0, "transfrom", @primnum, trn*scale); This works great, the only problem is that my instances don't rotate anymore. Is there a way to read the rotation back in, and "merge" it into trn matrix, so that my rotation is updated and not hardcoded? Thank you in advance !

[@jesterchrome]

you can use cracktransform() to extract what you need from the prim intrinsic then use maketransform() to set in your new trn with your custom scale

[@ichtreffnixtv8605]

@@jesterchrome Thanks!

[@rossisbudda]

Thaaats a... rivet!? But for sure a nice lesson. Thanks!