unaryMinus

Overloads the unary minus operator (-) to perform component-wise negation of this quaternion.

Each component (x, y, z, and w) of this quaternion is negated.

Note: For unit quaternions representing rotations, -q represents the exact same rotation as q. This operation does not compute the quaternion conjugate or inverse for rotation purposes (unless it's a specific case like a pure vector quaternion).