reflect
Calculates the reflection of an incident vector i across a surface defined by the normal vector n.
The reflection is computed using the formula: R = I - 2 * N * dot(I, N).
This function requires the normal vector n to be a unit vector (normalized) for the reflection to be geometrically accurate (where the angle of incidence equals the angle of reflection). A check is performed using 1e-6f tolerance to ensure n is normalized; an IllegalArgumentException is thrown if this precondition is not met.
Return
The reflected Vector4.
Parameters
The incident Vector4.
The normal Vector4 of the reflection surface. Must be a unit vector (its length must be approximately 1.0f within 1e-6f tolerance).
Throws
if the normal vector n is not normalized (i.e., abs(n.length() - 1.0f) >= 1e-6f).