This is the open source project KaDraw - Karlsruhe Graph Drawing. So far, it contains the algorithm MulMent [1] which is alternative iterative local optimizer suggested by Gansner et. al usable and fast in practice.
MulMent is a multilevel algorithm tailored to large networks. Its main drawing routine is a local optimizer suggested by Gansner et al. [2], which we have made fast in practice. Moreover, MulMent employs a coarsening algorithm for building the multilevel hierarchy that can control the trade-off between the number of hierarchy levels and convergence speed of the local optimizer. The speed of the local optimizer stems from (i) shared-memory parallelism and (ii) approximation of long-range forces by using coarser representatives stored in the multilevel hierarchy.

Example drawing of bcsstk31:

Example drawing.

September 2015: Initial Release of MulMent codes within the framework.


The program is licenced under GPL 2.0. Please let us know if you need a commercial licence.
If you publish results using our algorithms, please acknowledge our work by quoting the following paper:

             AUTHOR = {Meyerhenke, Henning and Nöllenburg, Marting and Schulz, Christian},
             TITLE = {{Drawing Large Graphs by Multilevel Maxent-Stress Optimization}},
             BOOKTITLE = {Proceedings of the 23rd International Symposium on Graph Drawing & Network Visualization},
             SERIES = {LNCS},
             PUBLISHER = {Springer},
             YEAR = {2015}



  • Write us an email if you need support!
  • We are glad for any comments and error reports (or even bug fixes or feature requests) that you send us.
  • Graphs used in our papers will be provided to you on request!


  • [1] Henning Meyerhenke, Martin Nöllenburg and Christian Schulz. Drawing Large Graphs by Multilevel Maxent-Stress Optimization. Proceedings of the 23rd International Symposium on Graph Drawing & Network Visualization. 2015.
    PDF here.
  • [2] Emden R. Gansner, Yifan Hu and Stephen North. A Maxent-Stress Model for Graph Layout. IEEE Transactions on Visualization and Computer Graphfics, Vol. 19, No. 6, 2013.

Other Open Source Frameworks

  • KaHIP -- Karlsruhe High Quality Partitioning
  • ParHIP -- Parallel High Quality Partitioning
  • KaLP -- Karlsruhe Longest Paths
  • KaMIS -- Karlsruhe Maximum Independent Sets
  • VieM -- Vienna Mapping and Sparse Quadratic Assignment