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A Multitouch Software Architecture

A Multitouch Software Architecture. Florian Echtler and Gudrun Klinker Technische Universität München Institut für Informatik. NordiCHI 2008: Using Bridges. Hank Wei. Outline. Introduction Related Work A Multitouch Software Architecture Implementation Discussion

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A Multitouch Software Architecture

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  1. A Multitouch Software Architecture Florian Echtler and Gudrun Klinker Technische Universität München Institut für Informatik NordiCHI 2008: Using Bridges Hank Wei

  2. Outline • Introduction • Related Work • A Multitouch Software Architecture • Implementation • Discussion • Conclusion and Future Work

  3. Introduction • Multi-touch Hardware & Software • Interoperability • Software Architecture • High-Level API • Across Hardware • Standardization

  4. Related Work • Multitouch Interfaces • low-level input processing tools • touchlib • reacTIVision • OSC-based TUIO • high-level interaction software • DiamondTouch • DiamondSpin

  5. Related Work • Other toolkits • vvvv, Processing, MPX • Recognize Gestures

  6. A Multitouch Software Architecture • Hardware Abstraction Layer • Transformation Layer • Interpretation Layer • Regions • Events • Features • Widget Layer

  7. Implementation • Multitouch Widgets based on OpenGL • Reconfigurable, Hardware-Independent • support Gestures (move, scale, rotate) • Hardware Drivers • for FTIR, DI, Wiimote, DiamondTouch.. • TUIO converters

  8. Discussion • Interoperability • Multi-Pointer X (MPX) • Latency • layer-to-layer • 100 sample (Hardware-Independent) on laptop • average latency of 2.35 ms, standard deviation of 0.26 ms • Use Case • add support for novel input device • create device-independent Multitouch App.

  9. Conclusion and Future Work • Software Architecture which aims to encompass the major common traits of existing multitouch software • Standard Library of Gestures • Hardware Abstraction Layers for other kinds of input hardware. • e.g., combined optical and acoustic tracking.

  10. Comment • Technology and then Architecture? • Architecture and then Technology? • Architecture v.s. Implementation

  11. Q&A thanks

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