Communications of the ACM
Towards device-independent graphics systems
SIGGRAPH '75 Proceedings of the 2nd annual conference on Computer graphics and interactive techniques
The semantics of graphic input devices
The papers of the ACM symposium on Graphic languages
Making nested rotations convenient for the user
SIGGRAPH '78 Proceedings of the 5th annual conference on Computer graphics and interactive techniques
Real-time measurement of multiple three-dimensional positions
Real-time measurement of multiple three-dimensional positions
Direct manipulation techniques for 3D objects using 2D locator devices
I3D '86 Proceedings of the 1986 workshop on Interactive 3D graphics
ACM Transactions on Graphics (TOG)
Tablet-based valuators that provide one, two, or three degrees of freedom
SIGGRAPH '81 Proceedings of the 8th annual conference on Computer graphics and interactive techniques
Application of graphical interaction to the analysis of radio astronomy data
SIGGRAPH '80 Proceedings of the 7th annual conference on Computer graphics and interactive techniques
Graphical input interaction technique (GIIT)
ACM SIGGRAPH Computer Graphics
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A logical valuator device which provides interactive graphical input of numeric values is presented. This device, called the Number Wheel, was developed for interactive control of highly dynamic three-dimensional displays but is not limited to this use: It is a general purpose valuator device. The implementation of the Number Wheel described here is based upon a digitizer tablet as the physical input device. The character of the Number Wheel is best explained by developing an analogy with a hypothetical physical device. The Number Wheel can be thought of as a wheel which has a portion of its circumference, or tread, protruding through a slot on the surface of the tablet, somewhat like a giant thumb wheel. Each value in the desired range of the valuator is represented by a point on the circumference of the wheel with the value of the device at any given time being the point at the top of the wheel. The valuator is changed by putting the pen on the wheel where it protrudes through the tablet and moving it back or forth in the direction of rotation. Whenever the pen leaves the rim of the wheel while still moving, the Number Wheel maintains the same speed of rotation until the pen returns to the wheel in order to change or stop its movement.