CumInCAD is a Cumulative Index about publications in Computer Aided Architectural Design
supported by the sibling associations ACADIA, CAADRIA, eCAADe, SIGraDi, ASCAAD and CAAD futures

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_id 84e8
authors Cohen, J.M., Markosian, L., Zeleznik, R.C., Hughes, J.F. and Barzel, R.
year 1999
title An Interface for Sketching 3D Curves
source ACM Symposium on Interactive 3D Graphics, pp. 17-22 (April 1999). ACM SIGGRAPH. Edited by Jessica Hodgins and James D. Foley
summary The ability to specify nonplanar 3D curves is of fundamental importance in 3D modeling and animation systems. Effective techniques for specifying such curves using 2D input devices are desirable, but existing methods typically require the user to edit the curve from several viewpoints. We present a novel method for specifying 3D curves with 2D input from a single viewpoint. The user rst draws the curve as it appears from the current viewpoint, and then draws its shadow on the oor plane. The system correlates the curve with its shadow to compute the curve's 3D shape. This method is more natural than existing methods in that it leverages skills that many artists and designers have developed from work with pencil and paper.
series other
last changed 2003/04/23 13:14

_id 2b17
authors Salesin, David and Barzel, Ronen
year 1986
title Two-Bit Graphics
source IEEE Computer Graphics and Applications. June, 1986. vol. 6: pp. 36-42 : ill. includes bibliography
summary Ordinary bitmaps allow pixels to be black or white. The authors introduce a second bitmap, the 'alpha' bitmap, which allows pixels to be transparent as well. The alpha bitmap makes it possible to have black-and-white images that are nonrectangular or that have holes in them. It also provides a richer set of operations for working with bitmaps. The article presents the mathematics for a two-bit compositing algebra, and suggest extensions for two-bit compositing, painting, and region filling. Each of these operations can be implemented with ordinary bitbits and presented on ordinary bitmap displays. The authors analyze the cost of each two-bit operation in terms of the number of bitbits it requires
keywords computer graphics, algorithms, display
series CADline
last changed 2003/06/02 11:58

_id b975
authors Salisbury, M., Anderson, S., Barzel, R. and Salesin, D.
year 1994
title Interactive pen-and-ink illustration
source Computer Graphics SIGGRAPH 1994 Proceedings, pages 101-108, July 1994
summary The goal of interactive pen-and-ink illustration is to be able to generate attractive and effective illustrations as easily as possible. We do this by having the computer perform the tedious work required to generate the many pen strokes in illustrations, while giving the user higher-level control over the darkness and textures used.
series journal paper
last changed 2003/04/23 13:14

_id caadria2006_573
id caadria2006_573
year 2006
source CAADRIA 2006 [Proceedings of the 11th International Conference on Computer Aided Architectural Design Research in Asia] Kumamoto (Japan) March 30th - April 2nd 2006, 573-575
summary Recently, more and more researchers dedicated in the development of human computer interaction for CAD systems, such as gestural input of three dimensional coordinates (Lee, Hu, and Selker, 2005), flexible manipulation of NURBS objects (Cohen, Markosian, Zeleznik, Hughes, and Barzel, 1999; Emmerik, 1990), and the creation of force feedback (Wu, 2003). These research results indicated that the more intuitive control the device can provide in modeling process, the more creative solutions can be generated (Lee, Hu, and Selker, 2005; Schweikardt and Gross, 2000; Wu, 2003).
series CAADRIA
last changed 2006/04/17 16:48

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