Primary Classification:
  I. Computing Methodologies
  I.3 COMPUTER GRAPHICS
      I.3.5 Computational Geometry and Object Modeling
          Subjects: Curve, surface, solid, and object representations

Additional Classification:
  H. Information Systems
  H.5 INFORMATION INTERFACES AND PRESENTATION (I.7)
      H.5.2 User Interfaces (D.2.2, H.1.2, I.3.6)
          Subjects: Input devices and strategies (e.g., mouse, touchscreen); Haptic I/O

  I. Computing Methodologies
  I.3 COMPUTER GRAPHICS
      I.3.3 Picture/Image Generation
          Subjects: Line and curve generation
      I.3.6 Methodology and Techniques
          Subjects: Interaction techniques

General Terms:
Design, Human Factors, Performance, Theory

Keywords:
3D modeling, ShapeTape, bimanual input, curves, gestures, input devices, interaction techniques, surfaces