Function CoordinateSystem

include/luxrays/core/geometry/vector.h:169–178

}

inline void CoordinateSystem(const Vector &v1, Vector *v2, Vector *v3) {
	if (fabsf(v1.x) > fabsf(v1.y)) {
		float invLen = 1.f / sqrtf(v1.x * v1.x + v1.z * v1.z);
		*v2 = Vector(-v1.z * invLen, 0.f, v1.x * invLen);
	} else {
		float invLen = 1.f / sqrtf(v1.y * v1.y + v1.z * v1.z);
		*v2 = Vector(0.f, v1.z * invLen, -v1.y * invLen);
	}
	*v3 = Cross(v1, *v2);
}

inline Vector SphericalDirection(float sintheta, float costheta, float phi) {
	return Vector(sintheta * cosf(phi), sintheta * sinf(phi), costheta);