Segment2D -- the class of a line segment in a 2D space

Methods that use an object of class Segment2D :

• pgfObject(Segment2D,HashTable) -- create the string describing a line segment in pgf
• pictureZone(Segment2D) -- find the zone that contains the line segment
• svgObject(Segment2D,HashTable) -- create the string describing a line segment in SVG

For the programmer

The object Segment2D is a type, with ancestor classes GraphicPrimitive < BasicList < Thing.