Tetra Tetris and Diamond Touch A MultiUser Touch
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Tetra. Tetris and Diamond. Touch: A Multi-User Touch Interface at Play INTERACT 2003 Collberg, Kobourov, Kobes, Trush, Smith, and Yee {collberg, kobourov, kobes, strush, bsmith, gyee}@cs. arizona. edu Sept. 3, 2003 Interact 2003
What is a Diamond. Touch Table? • Looks and feels like a table • A Multi-User Interface – Developed at Mitsubishi Electric Research Laboratories (MERL) in 2001 – Size of Entire Table (36 x 24 in / 91. 4 x 60. 96 cm) Sept. 3, 2003 Interact 2003 2
Related Work • Brown et. Al, (1990), Interact. • Sears et. Al, (1990), ACM annual conference on Cooperation. • Lee. Tiernan, S. , & Grudin, J. , (2001), Interact. • Dietz, P. , & Leigh, D. , (2001), 14 th Annual ACM Symposium on User Interface Software and Technology. • Cheok et. Al, (2002), Personal and Ubiquitous Computing. Sept. 3, 2003 Interact 2003 3
How Does it Work? • Table surface is an array of antennas • Capacitive Circuit: – table user receiver pad table pc 1 cm Sept. 3, 2003 Interact 2003 4
Questions • What are the quirks / limitations of the Diamond. Touch table? • Possible applications? Sept. 3, 2003 Interact 2003 5
Tetra. Tetris • Design Goals: – Multi-user – Simultaneous input – Hand-gestures – Intuitive – Fun Sept. 3, 2003 Interact 2003 6
Tetra. Tetris: Rules • Based off Tetris • Orig. Designed for 4 • Touch-take • Objective: Symmetrical compounds Sept. 3, 2003 Interact 2003 7
Implementation Issues • Finicky electronics – Electrical interference • Row / col matching – Table does not match rows with columns – Does NOT distinguish what pair of corners is touched – Our solution: “The bounding box” Sept. 3, 2003 Interact 2003 8
Bounding Box, Cont. • Takes outer-most rows and columns • Can be used like a ‘lasso’ • Rotational ambiguity Box Width Increase Turn Right Sept. 3, 2003 Box Height Increase Turn Left Interact 2003 9
Observations • No physical separation of input from output • Fast manipulation of large regions • Support for multiple, simultaneous users Sept. 3, 2003 Interact 2003 10
Challenges • Size of touch surface – 33 x 20 inches (84 x 51 cm) • Precision control – Table resolution (160 x 96) – After weighted interpolation (2560 x 1536) – Finger >> pixel • Lack of ability to display output – 7 minute solution: lots of duct tape Sept. 3, 2003 Interact 2003 11
Usefulness • Direct touch and drag • Collaborative use of the same application • Manipulating several objects using the ‘bounding-box’ Sept. 3, 2003 Interact 2003 12
Areas for Improvement • Precision control / Rotational ambiguity • Cost of setup • Electrical interference Sept. 3, 2003 Interact 2003 13
The Future? • Current improvements from MERL – Less electrical interference – Now fits standard 4: 3 aspect ratio (orig. 5: 3) – Maturing Software Development Kit • Possible applications – Cooperative architecture design – Collaborative musical composition – Coordinated disaster relief planning Sept. 3, 2003 Interact 2003 14
Links • Tetra. Tetris Homepage – http: //tetratetris. cs. arizona. edu • MERL Diamond. Touch Page – http: //www. merl. com/projects/Diamond. Touch Sept. 3, 2003 Interact 2003 15
Acknowledgements • Darren Leigh, Paul Dietz, Ubicomp 2002 Workshop on Collaboration and Interactive Walls and Tables, 2002. • Mitsubishi Electronic Research Laboratories, www. merl. com, ftp. merl. com 2002. Sept. 3, 2003 Interact 2003 16
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Goals of Diamond. Touch: • • • Sept. 3, 2003 Interact 2003 Multipoint Identifying Debris Tolerant Durable Unencumbering Inexpensive 20
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