pst-fill — a PSTricks package for filling and

METAPOST can be used to create animations. We show here an example of animation of polyhedra, introducing the 3d package. Introduction METAPOST (Hobby (1992); see also the description in Goossens et al. (1997)) is a drawing language very similar to METAFONT, but whose output is PostScript. METAPOST is especially suited for geometrical and technical drawings, where a drawing can naturally be decomposed in several parts, related in some logical way. Knuth is using METAPOST for the revisions of and additions to The Art Of Computer Programming (Knuth, 1997), and it is or will be a component of every standard T E X distribution. Unfortunately, METAPOST is still quite bare and the user is only o#ered the raw power --- a little bit like the T E X user who only has plain T E Xat his/her disposal. The lack of libraries is certainly due to the infancy of METAPOST (which came in the public domain at the beginning of 1995) and thus to the small number of its users. In this paper, we presen...

Statistical applications in fields such as bioinformatics, information retrieval, speech processing, image processing and communications often involve large-scale models in which thousands or millions of random variables are linked in complex ways. Graphical models provide a general methodology

The polygon remains a popular graphics primitive for computer graphics application. Besides having a simple representation, computer rendering of polygons is widely supported by commercial graphics hardware and software.

A new method for generating pictures is presented and illustrated with examples. The idea is to generate a string of symbols using an L−system, and to interpret this string as a sequence of commands which control a "turtle". Suitable generalizations of the notions of the L−system and of a turtle are introduced. The resulting mathematical model can be used to create a variety of (finite approximations of) fractal curves, ranging from Koch curves, to classic space−filling curves, to relatively realistic−looking pictures of plants and trees. All these pictures are defined in a uniform and compact way.

The rapid increase in the performance of graphics hardware, coupled with recent improvements in its programmability, have made graphics hardware acompelling platform for computationally demanding tasks in awide variety of application domains. In this report, we describe, summarize, and analyze

The goal of the research described in this paper is to develop an application-independent presentation tool that automatically designs effective graphical presentations (such as bar charts, scatter plots, and connected graphs) of relational information. Two problems are raised by this goal

Constraints provide a declarative means for specifying relationships that we wish to hold true. Interactive graphical applications give rise to varying kinds of constraints, and researchers have developed diverse constraint solving techniques. I survey the classes of constraints used by numerous

Writing scripts (often called “macros”) can be helpful for automating repetitive tasks. Scripting facilities for text editors like Emacs and Microsoft Word have been widely used and available. However, for graphical applications, scripting has been tried many times but has never been successful

reality and visualization. In this paper a simple experimental system for spatial sound simulation is presented, along with the results of several experiments that were conducted with this system. The system, called SAGA (Spatial Audio in Graphical Applications), was built to investigate the usability