Drawn By Numbers a drawing collective between Kirsty Badenoch and Peter Bulloch. Both are English, trained as architects' and both taught at Aarhus School of Architecture, Denmark. Their drawings explore narratives within drawings.
Miralles Lines, Curvature Analysis through Graphic Differential Geometry 3: Tangent & Normal Notation. In order to find a common notation that can describe all three curves, a notation of lines tangent and normal to the curves is introduced. Each tangent vector describes the trajectory at an instant along the curve. Each normal vector is extended to the center of the circle that best approximates the radius of curvature at that instant.