Mat3x3
A 3x3 Matrix.
Matrices in Rerun are stored as flat list of coefficients in column-major order:
column 0 column 1 column 2
-------------------------------------------------
row 0 | flat_columns[0] flat_columns[3] flat_columns[6]
row 1 | flat_columns[1] flat_columns[4] flat_columns[7]
row 2 | flat_columns[2] flat_columns[5] flat_columns[8]Arrow datatype arrow-datatype
FixedSizeList<9, float32>