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Skitters and jacks: interactive 3D positioning tools
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Source Symposium on Interactive 3D Graphics archive
Proceedings of the 1986 workshop on Interactive 3D graphics table of contents
Chapel Hill, North Carolina, United States
Pages: 183 - 196  
Year of Publication: 1987
ISBN:0-89791-228-4
Author
Eric Allan Bier  Xerox PARC, 3333 Coyote Hill Rd., Palo Alto, CA
Sponsor
SIGGRAPH: ACM Special Interest Group on Computer Graphics and Interactive Techniques
Publisher
ACM  New York, NY, USA
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Downloads (6 Weeks): 12,   Downloads (12 Months): 55,   Citation Count: 25
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ABSTRACT

Let scene composition be the precise placement of shapes relative to each other, using affine transformations. By this definition, the steps of scene composition are the selection of objects to be moved, the choice of transformation, and the specification of the parameters of the transformation. These parameters can be divided into two classes: anchors (such as an axis of rotation) and end conditions (such as a number of degrees to rotate). I discuss the advantages of using Cartesian coordinate frames to describe both kinds of parameters. Coordinate frames used in this way are called jacks. I also describe an interactive technique for placing jacks, using a three-dimensional cursor, called a skitter.


REFERENCES

Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

 
Barr81
A. H. Barr. "Superquadrics and Angle-Preserving Transformations." IEEE Computer Graphics and Applications, Volume 1, No. 1, 1981.
 
Bier83
Eric A. Bier. Solidviews: An Interactive Three Dimensional Illustrator. MIT, Cambridge, MA 02139, May 1983. MIT Dept of EECS Master's Thesis.
Bier86
 
Foley74
James D. Foley and Victor L. Wallace. "The Art of Natural Graphic Man-Machine Conversation." Proceedings of the IEEE, April 1974. Reprinted in IEEE Tutorial: Computer Graphics (pp. 315-324).
Forrest86
 
Séquin83
 
Upstill84
Steve Upstill, SCOT: An Introductory Tutorial, unpublished tutorial, EECS department, University of California, Berkeley, CA 94720, 1984,

CITED BY  25