Graph Visualization

Applications where graphs (networks, trees, etc.) are the primary data structure of interest are abundant and their number is increasing. The visualization of graphs is a research area with a long history and with many high quality algorithms now readily available. The interactive visualization of graphs is a relatively new research area.

Twilight is an interactive graph exploration tool for multi-touch systems. Twilight provides a flexible environment that can be used to visualize and analyse graphs and networks found in the computational science. It was designed for visualizing large graphs from the following projects: Drug resistance in HIV mutations and transmission of infectious diseases (Virolab), Protein-protein interaction (VEARD) and Ontologies (ACGT). The interactive environment allows users to manipulate the layout in order to detect structures and patterns.

The project was used on the UvA Multitouch table (UvA/MMT). The UvA/MTT, developed at the Section Computational Science, combines graphics rendering with a multi-point input device to allow for direct interaction with graphical applications.

Project details

Project name: Twilight
Project membersLaurence Muller, Robert Belleman, Peter Sloot, David van Dijk, …
Published paper(s): none

Employer: University of Amsterdam / Scientific Visualization and Virtual Reality Research Group
Date: 2008/2009
Used technologies: C++/OpenSceneGraph/igraph/TUIO.  The MS Surface version uses a TUIO proxy (Surface SDK).
Code size: 6000 lines of code (C/C++) / 1200 lines of comments


Twilight running on the MS Surface

Old version of twilight


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