Browsing EG1985 Proceedings (Technical Papers) by Title
Now showing items 1-20 of 36
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A 3-D CELLULAR FRAME BUFFER
(The Eurographics Association, 1985)A new architecture for storing and processing of threedimensional (3-D) graphics is described, The 3-D objects are discretized and stored in a full 3-D cellular memory of voxels. A 3-D graphics processor scan-converts 3-D ... -
BICEPS - THE INTERACTIVE GRAPHICS AIDED SYSTEM FOR BI-DIMENSIONAL GEOMETRY YODELING, NESTING AND FLAME CUTTING TECHNOLOGY
(The Eurographics Association, 1985)An essential condition for effective usage of numerically controlled devices is their correct and efficient programming. Especially in cutting applications every nesting layout requires a new control program tape. The ... -
A CONCEPT FOR A GKS MACHINE
(The Eurographics Association, 1985)General ideas for the creation of a very intelligent graphic terminal are presented; this terminal should know all GKS functionalities, including the future 3D Standard as well. Multiple Workstation concept is maintained ... -
Configuring Reference Systems for Certifying GKS Implementations
(The Eurographics Association, 1985)The development of test packages for certifying GKS implementations is based on the falsification approach which provides a useful framework in the area of software validation. Although there are different test strategies, ... -
CREATING CSG MODELLED PICTURES FOR RAY-CASTING DISPLAY
(The Eurographics Association, 1985)30-picture synthesis systems used for instance in the audiovisual field or networked services require the implementation of easy-to-use aids to composition. This particular composition software realizes the sizing and ... -
A CSG LIST PRIORITY HIDDEN SURFACE ALGORITHM
(The Eurographics Association, 1985)Several algorithms exist for visualizing geometric models defined by constructive solid geometry (CSG). Each of these algorithms is based on standard hidden surface methods, such as ray tracing, scan-line and z-buffer ... -
DETERMINATION OF LOCAL COORDINATE SYSTEMS FOR TEXTURE SYNTHESIS ON 3-D SURFACES
(The Eurographics Association, 1985)We propose and compare three types of local coordinate systems and describe their geometric properties Several results of texture synthesis on 3-D surfaces using these local coordinate systems are presented The synthesis ... -
EXTENDING GKS TO A DISTRIBUTED ARCHITECTURE
(The Eurographics Association, 1985)The recently adopted standards in the fields of computer networks and computer graphics has given to the opportunity to start a project to develop a distributed model of the Graphical Kernel System (GKS). The aim of this ... -
FRACTIONAL BROWNIAN RELIEF : AN EXACT LOCAL METHOD
(The Eurographics Association, 1985)Fractional Brownian process has been widely used for computer rendering of terrain models. The implementation constraints in Computer Graphics have led to the use of recursive methods, based on some local properties of ... -
A GENERALISATION OF THE TIMMER BLENDING FUNCTIONS FOR BEZIER-TYPE CUBIC CURVES
(The Eurographics Association, 1985)Alternative blending functions are derived for a Bezier-type cubic curve touching the middle side of its control polygon. Three shape parameters are used which determine the point on the middle side of the control polygon ... -
GENERALIZATION OF CONTOUR TRACKING IN IMAGE SYNTHESIS, AND APPLICATION
(The Eurographics Association, 1985)In this report, we propose to present most of the treatments about convex and nonconvex colored shapes from a data structure of their contour which is the general approach of contour tracking . Contour filling and oblique ... -
GEOMETRIC MODELLING USING EXACT OCTREE REPRESENTATION OF POLYHEDRAL OBJECTS
(The Eurographics Association, 1985)In the last few years, octrees have been proposed for the representation of solids in Geometric Modelling systems. Using them, boolean operations are simple; however, they use a great amount of memory and it is very difficult ... -
GKS Inquiry Functions within Prolog
(The Eurographics Association, 1985)This paper discusses the semantics of the GKS inquiry functions within a Prolog environment and illustrates the flexibility built into a proposed Prolog binding. -
GRAPHICAL DATA BASES BUILT ON PEANO SPACE-FILLING CURVES
(The Eurographics Association, 1985)This paper is devoted to the applications of Peano spacefilling curves for modelling graphics information. These curves, based on bit interlacing, allow the modelling, easily, of images with quadtrees, solids with octrees ... -
GRAPHICS PROGRAMMING FOR KNOWLEDGE-GUIDED INTERACTION
(The Eurographics Association, 1985)This paper describes a design approach that combines knowledge engineering techniques with an interactive graphics program. A prototype for specifying computer systems interactively is used to demonstrate the design approach. ... -
Graphics Programming with "Archetypes" - A Preliminary Study -
(The Eurographics Association, 1985)This paper is a brief report on the initial phase of the formal development of a graphics programming system. At this stage of the specification, the system architecture is just outlined and attention is focussed on the ... -
HUTWINDOWS: AN APPROACH TO USER INTERFACE DEVELOPMENT
(The Eurographics Association, 1985)The design and implementation of good graphical user interfaces is a difficult task requiring good taste and proper tools. The HutWindows system under development at Helsinki University of Technology is intended to be an ... -
An illumination model for ray-tracing
(The Eurographics Association, 1985) -
AN IMPROVEMENT OF THE RAY-TRACING ALGORITHM
(The Eurographics Association, 1985)This paper describes an improvement of the ray-tracing algorithm. The new method takes advantage of a data structure which allows us to consider only the closest objects to the path of the ray. This technique can be applied ...