About Us

Rechenraum e.U. is a Vienna based start-up developing effective software solutions for processing and optimizing geometric data. The company was established in 2012 by Dr. Simon Flöry.


Rechenraum e.U.
Stutterheimstraße 16-18, Stiege 2, 3. Stock, 20a
1150 Wien, Austria

phone: +43 (0)1 789 061 269
mobile: +43 (0)681 815 023 16


Our work is based on cutting edge knowledge, emerging from our continuous research efforts with partners from industry and academia. Among others, our research is and has been supported by aws (Austria Wirtschaftsservice), FFG (Austrian Research Promotion Agency) and the Vienna Business Agency.

Publication list

Martin Reis, Heinz Schmiedhofer, Simon Flöry, Florian Rist and Georg Suter. A Novel Dovetail Joining Method for Planar Panels with Non-Orthogonal Cut Surfaces. Applied Mechanics and Materials, volumes 799-800, 335-342, 2015.

Heinz Schmiedhofer, Martin Reis, Simon Flöry, Florian Rist and Georg Suter. A Framework for Linking Design and Fabrication in Geometrically Complex Architecture. In David Gerber et al., editors, ACADIA 2014 Design Agency, Proc. ACADIA 2014, 247-256, 2014.

Murat Arikan, Michael Schwärzler, Simon Flöry, Michael Wimmer and Stefan Maierhofer. O-Snap: Optimization-Based Snapping for Modeling Architecture. ACM Trans. Graphics 32/1, #6, 2013.

Simon Flöry, Yukie Nagai, Florin Isvoranu, Helmut Pottmann, and Johannes Wallner. Ruled Free Forms. In Advances in Architectural Geometry 2012. Springer, 2012.

Simon Flöry and Helmut Pottmann. Ruled surfaces for rationalization and design in architecture. In Aaron Sprecher et al., editors, LIFE in:formation. Proc. ACADIA 2010, 103–109, 2010.

Johannes Wallner, Alexander Schiftner, Martin Kilian, Simon Flöry, Mathias Höbinger, Bailin Deng, Qi-Xing Huang, and Helmut Pottmann. Tiling freeform shapes with straight panels: Algorithmic methods. In Cristiano Ceccato et al., editors, Advances in Architectural Geometry 2010, 73–86. Springer, 2010.

Sajjad Baloch, Rupen Melkisetoglu, Simon Flöry, Sergei Azernikov, Greg Slabaugh, Alexander Zouhar, and Tong Fang. Automatic detection of anatomical features on 3D ear impressions for canonical representation. In Tianzi Jiang et al., editors, MICCAI 2010, volume 6363, 555–562. Springer, 2010.

Simon Flöry and Michael Hofer. Surface fitting and registration of point clouds using approximations of the unsigned distance function. Computer Aided Geometric Design, 27:60–77, 2009.

Barbara Thuswaldner, Simon Flöry, Robert Kalasek, Michael Hofer, Qi-Xing Huang, and Hilke Thür. Digital anastylosis of the octagon in ephesos. ACM JOCCH, 2(1):1–27, 2009.

Simon Flöry. Fitting curves and surfaces to point clouds in the presence of obstacles. Computer Aided Geometric Design, 26(2):192–202, 2009.

Martin Kilian, Simon Flöry, Zhonggui Chen, Niloy J. Mitra, Alla Sheffer, and Helmut Pottmann. Curved folding. ACM Trans. Graph., 27(3):75:1–75:9, 2008.

Martin Kilian, Simon Flöry, Zhonggui Chen, Niloy J. Mitra, Alla Sheffer, and Helmut Pottmann. Developable surfaces with curved creases. In Proc. AAG 2008, 33–36, 2008.

Simon Flöry and Michael Hofer. Constrained curve fitting on manifolds. Computer Aided Design, 40(1):25–34, 2008.

Niloy J. Mitra, Simon Flöry, Maks Ovsjanikov, Natasha Gelfand, Leo Guibas, and Helmut Pottmann. Dynamic geometry registration. In Proc. SGP 2007, 173–182, 2007.

Qi-Xing Huang, Simon Flöry, Natasha Gelfand, Michael Hofer, and Helmut Pottmann. Reassembling fractured objects by geometric matching. ACM Trans. Graph., 25(3):569–578, 2006.


Simon Flöry. Constrained Matching of Point Clouds and Surfaces. PhD Thesis, TU Wien, 2010.

Simon Flöry. Fitting B-Spline Curves to Point Clouds in the Presence of Obstacles. Master Thesis, TU Wien, 2005.


Gregory G. Slabaugh, Tong Fang, Rupen Melkisetoglu, and Simon Flöry. Method and system for second bend plane detection of ear canal surfaces, US20090148016, 2009.