User Interface Research Group - Masatomo Kobayashi - Sketching 3D Curves with Single ...
This study tried to propose a new sketching technique that allows users to draw 3D curves using a hand-drawn trajectory on a 2D screen. A free stroke trajectory drawn on the 2D canvas is projected into the air in the virtual 3D space, keeping the virtual velocity constant, v. Considering the speed of stroke drawing, this technique would make users free from unnecessary overheads to determine the depth of strokes, such as switching viewpoints or drawing the shadow of curves.
It was extremely difficult for users to control the speed of drawing. They could not draw any 3D shapes except very rough curves and spirals. We think, however, the speed-based strategy has potential to enhance existing systems.
KOBAYASHI Masatomo <kobayash at is.s.u-tokyo.ac.jp>