Abstract:
Geometric transformation gestures such as rotation, scaling and dragging
are extremely common. There are multiple variants of designing and implementing
these gestures. Variants include slightly modifying the gesture
input (e.g. different original placement or tracing of fingers) or the resulting
action (e.g. scale factor, retention of scale centre or rotation degree). There
has not been a significant amount of research assessing the best design of
geometric transformation gestures across multiple multi-touch devices.
We describe our research project that looks at variants of standard
geometric transformation hand gestures. We hypothesise that these variants
are superior to standard geometric transformation gestures (in terms of
supporting more precise transformations and faster completion times) and
are as easy to initiate and maintain as the standard gestures. We also discuss
our experiences in implementing these variants and describe and present
user experiments we have completed in order to test our hypotheses.
The results show that only some of our variants are more precise and
support faster transformation completion and that only some of these
results are mirrored between devices. Furthermore, only some of our
variants are as easy to initiate and maintain as the standard gestures.
