Houdini 19.0 Python scripting hou hou.Matrix3

hou.Matrix3 class

A 3×3 matrix of floating point values.

3×3 matrices are typically used in Houdini to represent a 3D rotation (with a possible scale). Most places in Houdini use hou.Matrix4, which can store generation 3D transformations (including translations).

Note that you can construct a general transformation Matrix4 from a Matrix3 by writing hou.Matrix4(matrix3).