public static int test_0_simple_packed_invsqrt () {
Vector4f a = new Vector4f (16, 4, 100, 25);
//this function has VERY low precision
a = a.InvSqrt ();
if (a.X < (1/4f - 0.01f) || a.X > (1/4f + 0.01f))
return 1;
if (a.Y < (1/2f - 0.01f) || a.Y > (1/2f + 0.01f))
return 2;
if (a.Z < (1/10f - 0.01f) || a.Z > (1/10f + 0.01f))
return 3;
if (a.W < (1/5f - 0.01f) || a.W > (1/5f + 0.01f))
return 4;
return 0;
}
