Acknowledgements

Thanks to Bruce Gooch, Peter Shirley, Elaine Cohen, Rich Riesenfeld, Susan and Tice Ashurst, Georgette Zubeck, David Johnson, Bill Martin, Richard Coffey, Colette Mullenhoff, Brian Loss, Matt Kaplan, Tom Thompson, Russ Fish, Mark Bloomenthal, and the rest of the Alpha1 and SCI research groups, past and present. Thanks to Lee Markosian, Loring Holden, Robert Zeleznik, and Andrew Forsberg, from Brown University, for letting me collaborate on the JOT Project. Also, thanks to Jason Herschaft for the dinosaur claw model. This work was supported in part by DARPA (F33615-96-C-5621) and/or the NSF Science and Technology Center for Computer Graphics and Scientific Visualization (ASC-89-20219). All opinions, findings, conclusions, or recommendations expressed in this document are mine and do not necessarily reflect the views of the sponsoring agencies.