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ACM Transactions on Graphics (TOG), Volume 13 Issue 3, July 1994

User interface specification using an enhanced spreadsheet model
Scott E. Hudson
Pages: 209-239
DOI: 10.1145/195784.195787
This paper describes a new interactive environment for user interface specification which is based on an enhanced spreadsheet model of computation. This environment allows sophisticated graphical user interfaces with dynamic feedback to be...

Exact integer hybrid subdivision and forward differencing of cubics
R. Victor Klassen
Pages: 240-255
DOI: 10.1145/195784.197476
Forward differencing is widely used to generate rapidly large numbers of points at equally space parameter values along a curve. A failing of forward differencing is the tendency to generate many extraneous points for curves with highly...

Visualizing quaternion rotation
John C. Hart, George K. Francis, Louis H. Kauffman
Pages: 256-276
DOI: 10.1145/195784.197480
Quaternions play a vital role in the representation of rotations in computer graphics, primarily for animation and user interfaces. Unfortunately, quaternion rotation is often left as an advanced topic in computer graphics education due to...

Projectively invariant intersection detections for solid modeling
Masatoshi Niizeki, Fujio Yamaguchi
Pages: 277-299
DOI: 10.1145/195784.197485
An intersection detection method for solid modeling which is invariant under projective transformations is presented. We redefine the fundamental geometric figures necessary to describe solid models and their dual figures in a homogeneous...

Smart telepointers: maintaining telepointer consistency in the presence of user interface customization
Kenneth J. Rodham, Dan R. Olsen, Jr.
Pages: 300-307
DOI: 10.1145/195784.197492
Conventional methods for maintaining telepointer consistency in shared windows do not work in the presence of per-user window customizations. This article presents the notion of a “smart telepointer,” which is a telepointer that...

Corrigenda: intersection algorithms for lines and circles
Henry G. Baker
Pages: 308-310
DOI: 10.1145/195784.197874