by For those who missed a fine conference, below is the Table of Contents for
the Proceedings of Graphics Interface '90, held 14-18 May, 1990 in Halifax,
N.S., Canada. To order your copy, send Canadian requests to CIPS and all
others to Morgan Kaufmann at the following addresses:
Canadian Information Morgan Kaufmann Publishers
Processing Society Order Fulfillment Center
243 College St., 5th Floor P.O. Box 50490
Toronto, Ontario, Canada Palo Alto, CA 94303
M5T 2Y1 USA
Tel: (416) 593-4040 (415) 965-4081
Price: Cdn$35.00 US$40.00
If you require any additional information about the proceedings or the
conference please feel free to contact me. Graphics Interface '91 will be
held in Calgary, Alberta, 3-7 June 1991; draft papers are due 31 October
1990.
...Stephen MacKay
Proceedings Editor, GI '90
s.mac...@nrc.ca
(613) 993-6553
T A B L E O F C O N T E N T S
Page
ALGORITHMS
An Adaptive Subdivision Algorithm for Crack Prevention in the Display
of Parametric Surfaces
Forsey and Klassen 1
Real-Time Hidden-Line Elimination for a Rotating Polyhedral Scene
Using the Aspect Representation
Plantinga, Dyer and Seales 9
Image and Intervisibility Coherence in Rendering
Marks, Walsh, Christensen and Friedell 17
Colored Noise Inversion in Digital Halftoning
Geist and Reynolds 31
ANIMATION
Issues in the Automated Generation of Animated Presentations
Karp and Feiner 39
Towards Generalised Motion Dynamics for Animation
Herr and Wyvill 49
Goal-Directed Human Animation of Multiple Movements
Morawetz and Calvert 60
RENDERING & RAY TRACING
Robust Ray Intersection with Interval Arithmetic
Mitchell 68
Approximate Ray Tracing
Dauenhauer and Semwal 75
Octant Priority for Radiosity Image Rendering
Wang and Davis 83
Imprecise Computation and Load Sharing in Computer Generated Imaging
Systems
Berger and Zhao 92
USER INTERFACE
Understanding Visual Effects in a Windowed Environment
Sun, Cowan and Booth 100
CTS: An Interactive Technique for Manipulating Structured Text
Burbidge and Olsen 108
A Taxonomy of Uses of Interaction History
Lee 113
The Datapaper: Living in the Virtual World
Green and Shaw 123
CMCCS ACHIEVEMENT AWARD WINNER'S INVITED PAPER
Twenty-four Years of Computer Graphics at NRC
Marceli Wein 131
INTERACTIVE SYSTEMS
SCULPT: An Interactive Solid Modeling Tool
Naylor 138
The Concept and Design of a Virtual Laboratory
Mercer, Prusinkiewicz and Hanan 149
A Prototype System for Design Automation via the Browsing Paradigm
Kochhar 156
DATA STRUCTURES & ALGORITHMS
Toward Reliable Polygon Set Operations
Friedell and Kochhar 167
Shaded Rendering and Shadow Computation for Polyhedral Animation
Seales and Dyer 175
Using Convex Differences in Hierarchical Representations of Polygonal
Maps
Rappoport 183
Constructing Orientation Adaptive Quadtrees
Nickerson and Hartati 190
RAY TRACING
Exploiting Temporal Coherence in Ray Tracing
Chapman, Calvert and Dill 196
A Ray Tracing Method for Illumination Calculation in Diffuse-Specular
Scenes
Shirley 205
Voxel Occlusion Testing: A Shadow Determination Accelerator for Ray
Tracing
Woo and Amanatides 213
Some Regularization Problems in Ray Tracing
Amanatides and Mitchell 221
MODELLING
Pruned Bezier Curves
Barry, DeRose and Goldman 229
An Object Models Development Tool to Support Image Understanding
System
Chen and Li 239
Constrained, Grammar-Directed Generation of Landscapes
Friedell and Schulmann 244
INVITED PAPER
An Intuitive Description of Parametric Splines in Computer Graphics
Brian Barsky 252
VISUALISATION
Visualization of the Development of Multicellular Structures
Fracchia and Prusinkiewicz and de Boer 267
Nassi-Shneiderman Diagrams and Tabletalk
Epstein 277
Definitive Interfaces as a Visualisation Mechanism
Beynon and Yung 285
Visualizing the Execution of Multi-processor Real-Time Programs
Flinn and Cowan 293