Parametric keyframe interpolation incorporating kinetic adjustment and phrasing control
- 1 July 1985
- journal article
- Published by Association for Computing Machinery (ACM) in ACM SIGGRAPH Computer Graphics
- Vol. 19 (3) , 255-262
- https://doi.org/10.1145/325165.325243
Abstract
Parametric keyframing is a popular animation technique where values for parameters which control the position, orientation, size, and shape of modeled objects are determined at key times, then interpolated for smooth animation. Typically the parameter values defined by the keyframes are interpolated by spline techniques with the result that the parameter change kinetics are implicitly defined by the given keyframe times and data points. Existing interpolation systems for animation are examined and found to lack certain desirable features such as continuity of acceleration or convenient kinetic control. The requirements of interpolation for animation are analyzed in order to determine the characteristics of a satisfactory system. A new interpolation system is developed and implemented which incorporates second-derivative continuity (continuity of acceleration), local control, convenient kinetic control, and joining and phrasing of successive motions. Phrasing control includes the ability to parametrically control the degree and extent of smooth motion flow between separately defined motions.Keywords
This publication has 11 references indexed in Scilit:
- Interpolating splines with local tension, continuity, and bias controlACM SIGGRAPH Computer Graphics, 1984
- Local control of bias and tension in beta-splinesACM SIGGRAPH Computer Graphics, 1983
- Computer graphic modeling of american sign languageACM SIGGRAPH Computer Graphics, 1983
- Computer animation with scripts and actorsACM SIGGRAPH Computer Graphics, 1982
- Inbetweening for computer animation utilizing moving point constraintsPublished by Association for Computing Machinery (ACM) ,1981
- Digital Representations of Human MovementACM Computing Surveys, 1979
- The problems of computer-assisted animationACM SIGGRAPH Computer Graphics, 1978
- A Practical Guide to SplinesPublished by Springer Nature ,1978
- Interactive skeleton techniques for enhancing motion dynamics in key frame animationCommunications of the ACM, 1976
- A system for computer generated moviesPublished by Association for Computing Machinery (ACM) ,1972