Vector clamp( ) {
		if ( !std::isfinite< float >( x ) || !std::isfinite< float >( y ) ) {
			x = y = z = 0.f;
		}
		y = std::remainder( y, 360.f );
		x = std::remainder( x, 180.f );
		std::clamp< float >( x, -89.f, 89.f );
		std::clamp< float >( y, -180.f, 180.f );
		z = 0;
		return *this;
	}