Matrices in Maya explained!

[Christoph_Schaedl]

Loic Pinsard explaining matrices in maya. 

Good to know if you use Bifrost.

https://loicpinsard.netlify.app/matrices-explained-part-one

[Grahame_Fuller]

Thanks for posting that link. One thing to keep in mind, though, is that Maya uses row vectors while Bifrost uses column vectors. This means that matrices are transposed (flipped along the main diagonal from top left to bottom right) so the translation is in the last column and projection is in the bottom row. In addition, it means that multiplication is performed in reverse order as compared to when using row vectors.

Note that matrices are automatically transposed when input or output to the scene, so you don't need to worry about transposing it yourself. However, you do need to remember which convention is used where.

Cheers,

gray

[Christoph_Schaedl]

Thanks for the additional info Grahame.

Is this somehow documented in the Bifrost Docs?

[Grahame_Fuller]

Indeed it is: Work with matrices and transforms.

Cheers,

gray

[Christoph_Schaedl]

My little Artist brain is now exploding.

Could you translate this image from a Maya Matrice to Bifrost.

My Brain does work with images. 😄

[Grahame_Fuller · Accepted solution]

Does this help?

gray

[Christoph_Schaedl]

Yes, thats readable for my brain!