Method random_dir

ogsr_engine/xrCore/_vector3d.h:408–419

        return *this;
    }
    IC SelfRef random_dir(CRandom& R = ::Random)
    {
        // z	= R.randF(-1,1);
        z = _cos(R.randF(PI));
        T a = R.randF(PI_MUL_2);
        T r = _sqrt(1 - z * z);
        T sa = _sin(a);
        T ca = _cos(a);
        x = r * ca;
        y = r * sa;
        return *this;
    };
    IC SelfRef random_dir(const Self& ConeAxis, float ConeAngle, CRandom& R = ::Random)
    {
        Self rnd;