“Time Management in a Real-Time Animation/Graphics Environment” by Cardman

  • ©Samuel J. Cardman




    Time Management in a Real-Time Animation/Graphics Environment


Session Title: General Applications Session



    An important aspect of a real-time animation/graphics system is the definition and management of time and time-dependent relationships: a correlation between “time in the outside world” and the program parameter considered to be “time” by the system must be established, and time-dependent relationships between user-defined objects must be fairly easily specified and possibly subsequently changed.

    Discussion of the time management problem proceeds in this paper in several stages. Part I considers the statement of the problem, rephrasing it in terms relevant to real-time animation/ graphics systems. Part II, a description of the hardware and software environment for our system, provides some of the background for its implementation. Part III discusses traditional solutions to the problem, as embodied in contemporary computer operating systems. Part IV is a brief survey of time management techniques used in several computer graphics systems, while Part V presents our solution and Part VI discusses problems still remaining.


    1. Baecker, R. M., Picture-driven Animation, AFIPS 1969 Spring Joint Computer Conference Proceedings, vol 34, 1969, pp 273–288
    2. Cardman, S. J., Time Management in a Real-Time Animation/Graphics Environment, Technical Report to the NSF, DCR74-00768A01, to be published August 1975
    3. DeFanti, T. A., The Graphics Symbiosis System, Real-Time Film Animation, Annual Report to the NSF, GJ-204, 1973, pp 5–115
    4. Frailey, D. J., Timing Features for Systems Implementation Languages, Information Processing 74, IFIP Congress 74 Proceedings, North-Holland, Amsterdam, 1974, pp 354–358
    5. Futrelle, R. P., and Potel, J. J., The System Design for GALATEA, An Interactive Real-Time Computer Graphics System for Movie and Video Analysis, GALATEA Report #3, University of Chicago, May 1974
    6. Futrelle, R. P., Concurrent Computations Driven By Real-Time Events, GALATEA Report #5, University of Chicago, August 1974
    7. Futrelle, R. P., Hard-Real-Time Structures in GALATEA, GALATEA Report #8, University of Chicago, October 1974

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