Search
Now showing items 31-40 of 42
An Analysis of Modeling Clip
(Eurographics Association, 1989)
Modeling clip gives an application the ability to remove sections of an object in order to view internal detail. The clipping volume defied by modeling clip can be concave and disjoint, and is composed of a set of volumes ...
Algorithms for 2D Line Clipping
(Eurographics Association, 1989)
New algorithms for 2D line clipping against convex, non-convex windows and windows that consist of linear edges and arcs are being presented. Algorithms were derived from the Cohen-Sutherland 's and Liang-Barsky s algorithms. ...
Non-Planar Polygons and Photographic Components for Naturalism in Computer Graphics
(Eurographics Association, 1989)
The measuring of natural objects like landscapes and already existing (not simply planned!) buildings produces natural data. That data of hue geometry typically consists of Non-planar Polygons. These may be triangulized, ...
Ray Tracing Polynomial Tensor Product Surfaces
(Eurographics Association, 1989)
With regard to ray tracing algorithms for polynomial tensor product surfaces, the most timecritical step is to find an intersection point of a ray and a surface. In this case it proves to be very difficult to decide whether ...
Graph Grammars, A New Paradigm for Implementing Visual Languages
(Eurographics Association, 1989)
This paper is a report on an ongoing work which started in 1981 and is aiming at a general method which would help to considerably reduce the time necessary to develop a syntax-directed editor for any given diagram technique. ...
Highlight Shading: Lighting and Shading in a PHIGS+/PEX-Environment
(Eurographics Association, 1989)
Todays graphics standard for the rendering of scenes with illumination and reflection is defined by PHIGS+ . PEX is a proposal to integrate that functionality into the window environment of X. This paper first describes ...
Representing Tolerance Information in Feature-Based Solid Modelling
(Eurographics Association, 1989)
In this paper a system for defining dimensions and tolerances is presented which deals with the geometric representation of the objects in a coherent and compact way. This model is a combination of a hierarchical boundary ...
2.5 Dimensional Graphics Systems
(Eurographics Association, 1989)
The outline of an extension of traditional 2D graphics systems is given. This extension is aimed at supporting a three dimensional application program, without incorporating full viewing into the general graphics system ...
GKS, Structures and Formal Specification
(Eurographics Association, 1989)
There are now three International Standards for application program interfaces for computer graphics programming, GKS, GKS-3D and PHIGS. In this paper a simplified model GKS-like system is described and a 2D PHIGS-like ...
Message-Based Object-Oriented Interaction Modeling
(Eurographics Association, 1989)
This paper describes a message-based object-oriented tool for exploring mathematically-based interactions which produce complex motions for computer animation. The tool has been implemented as an object in the object-oriented ...