Function envelope_r

utilities/olcUTIL_Geometry2D.h:2028–2031

	// Return rectangle that fully encapsulates a point
	template<typename T1>
	inline constexpr rect<T1> envelope_r(const olc::v_2d<T1>& p)
	{
		return rect<T1>(p, { 0,0 });
	}

	// envelope_r(l)
	// Return rectangle that fully encapsulates a line