AdgRDim, a new entity to quote radial dimensions, is now available. A bunch of new classes to manage hatches have been implemented. Specifically, AdgHatch is the entity to be added to the canvas, AdgFillStyle a generic abstract class that wraps cairo_pattern_t and AdgRuledFill the AdgFillStyle implementation to fill an hatch with a serie of parallel lines with custom spacing and angle. The AdgModel now supports named pairs, that is any coordinates can be set explicitely (as before) or as a reference to a pair set by the model. The AdgPoint helper class is the object used to manage this relationship. The API of dimension entities has been updated to accept AdgPoint instead of plain AdgPair.