Luna::reflect

Float4 reflect(const Float4 &ivec, const Float4 &nvec)

Computes the reflected vector of the input vector.

This function performs the following operations:

return ivec - (2 * [dot](group___runtime_math_vector_1ga59253c111957a8ea29144ec873bcdc1c.md)(ivec, nvec) * nvec);

Parameters

• in ivec

  The direction of the incident ray.

• in nvec

  The direction of the surface normal.

Return value

Returns the direction of the reflected ray. The length of the reflected vector is the same as the length of the ivec.

Valid Usage

• nvec must be a normalized vector.