The 3D Tractus: A Three-Dimensional Drawing Board (Lapides, et al – 2006)

Current Mood: studious

Blogs I Commented On:

• Pankaj Rajan
• Aaron Wolin
• Brandon Paulson

Summary:
This paper discusses the 3D Tractus, a drawing board-like device which can be raised and lowered to provide sketches in 3D. The device employs a counterweight system for easy vertical motion, four vertical aluminum bars for support, a tablet for the actual sketching, and a string potentiometer as a height senseor. For the software, a pen-based device handles input, and users have three visual software components to work with: a 3D sketch overview window, a drawing pad window, and a menu bar to access less common features. Dynamic line width is used to provide depth cues, and a traditional image editor-like eraser is used for deleting entire strokes.

Discussion:
The device discussed in this paper is an interesting concept for emulating 3D sketching using a standard tablet. There are obviously some limitations in providing true 3D sketching as it can only provide depth cues though a 2D window as opposed to a VR-based solution to visualize those same depths. I would imagine the usability would feel a bit distracting by relying on the other arm to navigate the drawing area in order to perform 3D sketching. Some improvements on the system I would suggest are a button to automate vertical movement, and an inclined surface to provide easier drawing. I can imagine some people whom would enjoy using this system over traditional devices.