1. State Key Laboratory of Computer Science, Institute of Software, Chinese Academy of Sciences, Beijing 100190, China
2. School of Digital Media and Design Arts, Beijing University of Posts and Telecommunications, Beijing 100876, China
3. Beijing Key Lab of Human-Computer Interaction, Institute of Software, Chinese Academy of Sciences, Beijing 100190, China
Corresponding author (email@example.com
This paper presents a new pen-based technique, Tilting-Twisting-Rolling, to support compass geometric construction. By leveraging the 3D orientation information and 3D rotation information of a pen, this technique allows smooth pen action to complete multi-step geometric construction without switching task states. Results from a user study show this Tilting-Twisting-Rolling technique can improve user performance and user experience in compass geometric construction.
This work was supported by National Key Research and Development Plan of China (Grant No. 2016YFB1001405), National Natural Science Foundation of China (Grant Nos. 61232013, 61422212, 61303162), Fundamental Research Funds for the Central Universities, and Beijing Municipal Social Science Foundation (Grant No. 16YTC033).
Steps in constructing an arc. (a) Setting the centre point; (b) adjusting the radius; (c) fixing the radius; protectłinebreak(d) drawing the arc.
User's actions with Tilting-Twisting-Rolling. (a) Pen tapping to set the center; (b) pen tilting to adjust the radius; (c) pen twisting to set the radius; (d) pen rolling to draw.
3D coordinates for modeling the virtual compass.
State transitions of the compass.
Drawing the bisector of an angle.
Mean movement time and mean error rate for two techniques. Mean values and the standard error for each series are shown.
Subjective ratings. Median value and the standard error for each series are shown.
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