From: Colin Godfrey To: siggraphdistrib@cs.umb.edu Subject: *CAL* SIGGRAPH/Boston: Wed May 5 ***Cancellation***, Wed May 26 announcement Date: Monday, May 03, 1999 5:48 PM --- SIGGRAPH/Boston Wed. May 5, meeting cancelled. --- We regret to announce that we heard today that the speakers for the Wed. May 5 meeting ("Design Information Media Management System" and the "Media Mapper") have cancelled. So we shall not meet this month, except for the special meeting on Wed May 26 announced below. Our last regular meeting of the season will be on 9 June with a presentation from SensAble about a new input device for computer clay modeling and sculpting. See http://www.siggraph.org/chapters/boston for details. ----------------------------------------------------------------------------- SIGGRAPH/Boston Meeting Announcement Wednesday 26 May 1999 at GTE Labs in Waltham MA (room 3-120) This will be a special meeting where we will hear from two local speakers that had papers accepted to this summer's SIGGRAPH conference. "Skin: A Constructive Approach to Modeling Free-form Shapes" by Lee Markosian, Jonathan M. Cohen, Thomas Crulli, and John Hughes Presented by Lee Markosian We present a new particle-based surface representation with which a user can interactively sculpt free-form surfaces. The particles maintain mesh connectivity, and operate under rules which lead them to form triangulations with properties suitable for use in subdivision. The user interactively guides the particles, which we call 'skin', to grow over a given collection of polyhedral elements (or 'skeletons'), yielding a smooth surface (through subdivision) that approximates the underlying skeletal shapes. Skin resembles blobby modeling in the constructive approach to modeling it supports, but allows for a richer vocabulary of skeleton shapes, supports sharp creases where desired, and provides a convenient mechanism for adding multiresolution surface detail. About the Speaker Lee is a Ph.D. student in Computer Science at Brown. He expects to complete his dissertation, titled "Art-based Modeling and Rendering for Computer Graphics," later this year. "Art-Based Rendering of Fur, Grass, and Trees" by Michael A. Kowalski, Lee Markosian, J.D. Northrup, Lubomir Bourdev, Ronen Barzel, and John F. Hughes Presented by Michael Kowalski Artists and illustrators can evoke the complexity of fur or vegetation with relatively few well-placed strokes. We present an algorithm that takes such an approach to render 3D scenes containing fur, grass and trees in a stylized manner based on the drawings of Dr. Seuss and others. The algorithm is implemented within a broader framework which supports procedural stroke-based textures on polyhedral models. It renders moderately complex scenes at multiple frames per second on current graphics workstations, and provides some measure of inter-frame coherence. About the Speaker Michael will be graduating from Brown University this May with a Master's degree in Computer Science. His background includes training in traditional drawing and painting, and his research interest is the application of art and illustration principles to computer rendering. In June he will begin work for ATR Research Labs in Kyoto, Japan. When Wednesday, May 26, 1999. Networking time and light refreshements at 6:30 PM, announcements and feature presentation at 7:00 PM. Where GTE Laboratories, 40 Sylvan Rd., Waltham, MA, conference room 3-120 Directions to GTE Labs From Route 128 (interstate 95), get off at exit 27B, Winter Street, in Waltham. -> From I-95 (128) South the exit leads you right onto Winter Street. -> From I-95 (128) North, turn right at the light at the end of the exit, onto Wyman Street, turn right again at the next opportunity, onto Winter Street, and cross over I-95. Go West on Winter Street through 3 closely spaced traffic lights, staying in the right lane. The Cambridge Reservoir appears on your right and the entrance to GTE Laboratories (40 Sylvan Road) is on the left. About halfway past the buildings, turn right under a pedestrian bridge joining two buildings. Lobby 3 is essentially straight ahead, on a small circular driveway at the end of the road you are on. Park in the central lot and sign in at Lobby 3. The talk is in room 3-120.