Features

Visualization

various shapes and styles for vertices;
polyline and smooth curved edges;
various styles for edge lines and arrows;
color selection for all graph components;
possibility to scale graph image to arbitrary size;
flexible technique of labels visualization;
multiline labels text;
edge text movable along the edge line;
external vertex text movable around the vertex;
font selection for labels text;
built in graph drawing algorithms;
the user can add new graph drawing algorithms;
two graphical output formats;
special technique for visualization of hierarchical structure;
open and closed fragments;
overview window for better navigation in large graphs;
a number of options that control graph visualization.

Editor

standard intuitive user interface;
almost unlimited number of undo levels;
cut/copy/paste operations;
optimized screen update;
each fragment can be opened in separate window;
automatic elimination of objects overlapping;
automatic vertex size adjusting;
grid with several parameters;
a number of options that configure user interface;
online help available for each menu, dialog box and editor mode.

Algorithms animation

animation at run time;
samples caching for repeated and backward animation;
interaction between the user and an external module;
process specific parameters, changeable at run time;
a number of options that control sample generation;
process execution protocol;
easy to learn and use API for external modules implementation, provided by HGL library;
full documentation on HGL usage.