Prof. Dr. Jürgen Döllner

Scientific Activities

  • Organization
    Publicity & Web Chair (IEEE VISSOFT 2014)


Mixed-Projection Treemaps: A Novel Approach Mixing 2D and 2.5D Treemaps

Limberger, Daniel; Scheibel, Willy; Trapp, Matthias; Döllner, Jürgen in Proceedings of the International Conference on Information Visualization 2017 2017 .

2D treemaps are a space-filling visualization technique that facilitate exploration of non-spatial, attributed, tree-structured data using the visual variables size and color. In extension thereto, 2.5D treemaps introduce height for additional information display. This extension entails challenges such as increased rendering effort, occlusion, or the need for navigation techniques that counterbalance the advantages of 2D treemaps to a certain degree. This paper presents a novel technique for combining 2D and 2.5D treemaps using multi-perspective views to leverage the advantages of both treemap types. It enables a new form of overview+detail visualization for complex treemaps and contributes new concepts for real-time rendering of and interaction with mixed-projection treemaps. The technique operates by tilting up inner nodes using affine transformations and animated state transitions. The mixed use of orthogonal and perspective projections is discussed and application examples that facilitate exploration of multi-variate data and benefit from the reduced interaction overhead are demonstrated.
Mixed-Projection Treemaps... - Download
Further Information
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  • "Master's Thesis Presentation" (Preisträger des studentischen Wettbewerbs), DGKF & DGPF Workshop "3D-Stadmodelle", Bonn,  Germany  (November 20, 2013)
  • "Interactive Software Maps for Web-Based Source Code Analysis", Web3D2013, San Sebastian, Spain (June 20, 2013)
  • "Annotating 3D Content in Interactive, Virtual Worlds ", Web3D2013, San Sebastian, Spain (June 21, 2013)
  • "Single-Pass Rendering of Day and Night Sky Phenomena", VMV2012, Magdeburg, Germany (November 12, 2012)
  • "Semantik-basierte nicht-photorealistische Visualisierung von 3D-Stadtmodellen", 58. Deutscher Kartographentag, Berlin, Germany (June 8, 2010)

Teaching activities

Winter term 2013/14

  • course "Game Programming" (tutor & co-lecturer)
  • course "Computergraphics II" (tutor)
  • course "Software Analytics" (tutor)
  • pupils academy "Introduction to 3D CG" (co-lecturer)

Summer term 2013

  • course "Computergraphics I" (tutor)
  • course "Graphics Programming with OpenGL and C++" (tutor & co-lecturer)
  • course "Software Visualization Techniques" (tutor)

Winter term 2012/13

  • course "Game Programming" (tutor & co-lecturer)
  • course "Computergraphics II" (tutor)
  • course "Concepts and Techniques for 3D Visualization" (tutor)
  • pupils academy "Introduction to 3D CG" (co-lecturer)

Portfolio and More

Portfolio [in progress]www.daniellimberger.de
Latest Web Project [in progress]www.glisdeprecated.com
Open Sources @ Googlecode.google.com/u/cg.costume/
Open Sources @ GitHub


Vimeo Archive [old stuff]vimeo.com/user2011768