rotateByDegrees

Creates and returns a 3x3 matrix representing a 2D rotation in the XY-plane (equivalent to a rotation around the Z-axis in a 3D context).

A positive angle results in a counter-clockwise rotation when looking down the Z-axis towards the origin (standard right-handed system convention for Z-axis rotation). The Z-coordinates of transformed vectors are unaffected by this matrix.

The input angle is specified in degrees and is converted to radians internally for trigonometric calculations.

The resulting matrix is:

| cos(rad)  -sin(rad)  0.0 |
| sin(rad)   cos(rad)  0.0 |
| 0.0        0.0       1.0 |

where rad is the input angle converted to radians.

Parameters