line_class (library)

Author(s): Montserrat Urraca.

Version: 1.10#7 (2006/4/26, 19:22:13 CEST)

Version of last change: 1.9#131 (2003/12/4, 17:33:38 CET)

Usage and interface (`line_class`)

Library usage: :- use_module(library(line_class)).
Exports:
- Predicates: vertices/1, arrowheads/1.
Other modules used:
- System library modules: objects/objects_rt, lists.

PREDICATE: vertices/1:

Usage 1: vertices(+ListofPoints)

Description: The arguments of the list specify the coordinates for two or more points that describe a serie of connected line segments.
Call and exit should be compatible with: +ListofPoints is a list. (basic_props:list/1)

Usage 2: vertices(-ListofPoints)

Description: Gets the list of points of the line.
Call and exit should be compatible with: -ListofPoints is a list. (basic_props:list/1)

PREDICATE: arrowheads/1:

Usage 1: arrowheads(+Where)

Description: Where indicates whether or not arrowheads are to be drawn at one or both ends of the line. Where must have one of the next values: none ( for no arrowheads ), first (for an arrowhead at the first point of the line), last (for an arrowhead at the last point of the line), or both (for arrowheads at both ends). This option defaults to none.
Call and exit should be compatible with: +Where is currently instantiated to an atom. (term_typing:atom/1)

Usage 2: arrowheads(-Where)

Description: Gets position of the arrowheads.
Call and exit should be compatible with: -Where is currently instantiated to an atom. (term_typing:atom/1)