Function reflection

linear_algebra/src/transformations_2d.py:50–58

>>> reflection(45) # doctest: +NORMALIZE_WHITESPACE [[0.05064397763545947, 0.893996663600558], [0.893996663600558, 0.7018070490682369]]

(angle: float)

def reflection(angle: float) -> list[list[float]]:
    """
    >>> reflection(45)  # doctest: +NORMALIZE_WHITESPACE
    [[0.05064397763545947, 0.893996663600558],
     [0.893996663600558, 0.7018070490682369]]
    """
    c, s = cos(angle), sin(angle)
    cs = c * s
    return [[2 * c - 1, 2 * cs], [2 * cs, 2 * s - 1]]


print(f"    {scaling(5) = }")