void AngleVectors (const QAngle &angles, Vector *forward, Vector *right, Vector *up)
{
	Assert( s_bMathlibInitialized );
	float sr, sp, sy, cr, cp, cy;
	
	SinCos( DEG2RAD( angles[YAW] ), &sy, &cy );
	SinCos( DEG2RAD( angles[PITCH] ), &sp, &cp );
	SinCos( DEG2RAD( angles[ROLL] ), &sr, &cr );

	if (forward)
	{
		forward->x = cp*cy;
		forward->y = cp*sy;
		forward->z = -sp;
	}

	if (right)
	{
		right->x = (-1*sr*sp*cy+-1*cr*-sy);
		right->y = (-1*sr*sp*sy+-1*cr*cy);
		right->z = -1*sr*cp;
	}

	if (up)
	{
		up->x = (cr*sp*cy+-sr*-sy);
		up->y = (cr*sp*sy+-sr*cy);
		up->z = cr*cp;
	}
}