Browsing EG1987 Proceedings (Technical Papers) by Title
Now showing items 1-20 of 43
-
3D Models in Computer-Assisted Chemistry
(Eurographics Association, 1987)Novel and efficient algorithms have been developed in order to display on a raster scan device some basic 3D models used in computer-assisted chemistry. They allow, among other things, the construction and manipulation of ... -
Active-Ray Tracing for 3D Medical Imaging
(Eurographics Association, 1987)Large quantities of three-dimensional (3D) information are produced by 3D medical imaging techniques such as CT and MRI, in the form of digital volumes (DV). We propose a new approach to help a human observer to visualize ... -
An Algorithm for 3D Scan-Conversion of Polygons
(Eurographics Association, 1987)A three-dimensional (3D) scan-conversion algorithm, that scanconverts 3D planar polygons into their discrete voxel-map representation within a Cubic Frame Buffer (CFB), is presented. The algorithm, which is a variation of ... -
An Approach to the Formal Specification of Configurable Models of Graphics Systems
(Eurographics Association, 1987)This paper describes a general framework for the formal specification of modular graphics systems. The approach is illustrated by an example taken from the Graphical Kernel System (GKS) and uses the Z specification notation. -
An Automatic Interpolation Method of Grayvalued Images Utilizing Density Contour Lines
(Eurographics Association, 1987)This paper presents an automatic method of interpolation or inbetweening for gray valued images, which have been difficult to be processed automatically. The method consists of three parts. The first i s the extraction of ... -
Bezier Patches with Local Shape Control Parameters
(Eurographics Association, 1987)In this paper, we introduce three types of shape control parmeters (tension, bias, and continuity) into the modelling of free-form surfaces composed of bicubic Bernstein-Bezier patches. This is an extension to surfaces of ... -
The Clockworks: An Object-Oriented Computer Animation System
(Eurographics Association, 1987)The Clockworks is an object-oriented computer animation system developed at RPl's Center for Interactive Computer Graphics (CICG). The Clockworks has the ability to model and graphically simulate complex 3-D engineering ... -
COLOUR SECTION
(Eurographics Association, 1987) -
Conformal Texture Mapping
(Eurographics Association, 1987)A new class of geometric mappings is introduced to computer graphics, and the utility of this class is illustrated by applying it to texture mapping. When mapping a texture onto a surface such as a polygon, the entire ... -
Designing a System to Provide Graphical User Interfaces: The THESEUS Approach
(Eurographics Association, 1987)This paper presents the design of THESEUS, a system for programming graphical user interfaces especially targetted at the area of software engineering. Starting with the special needs and requirements that arise in this ... -
Display of Solid Models with a Multi-Processor System
(Eurographics Association, 1987)There is a growing need for fast high-quality display of solid objects. Recently-developed custom-VLSI hardware offers high-speed display but lacks the flexibility and processing power at the pixel level to sustain the ... -
Dynamic Management of 3D Scenes
(Eurographics Association, 1987)When simulating a moving observer or sensor in a 3D scene which contains a large number of objects, only the objects lying in the field of view or of interaction, named the local data base, have to be taken into account ... -
Efficient and Consistent Algorithms for Determining the Containment of Points in Polygons and Polyhedra
(Eurographics Association, 1987)Algorithms are presented for the determination of whether a given point E<sup>2</sup> in is interior to, exterior to or on an arbitrary polygonal boundary and for the determination of whether a point in E <sup>3</sup> is ... -
Experiences in Implementing Postscript
(Eurographics Association, 1987)This paper describes an implementation of POSTSCRIPT for previewing use on workstations with high resolution bitmapped displays. It discusses implementation of storage management, area fill and line drawing, imaging, fonts ... -
Extended Octtrees, between CSG Trees and Boundary Representations
(Eurographics Association, 1987)Besides the most widely used models in the Geometric Modeling Systems, Constructive Solid Geometry (CSG) and Boundary Representations (BR), Octtrees have appeared as an alternative representation scheme which is particularly ... -
Extraction and Organization of Form Features into a Structured Boundary Model
(Eurographics Association, 1987)A method is presented for the automatic identification and extraction of feature information from the solid model of an object. The procedure consists of recognizing shape features, extracting those features as solid volumes ... -
A Fast Antialiasing Method with a Z-Buffer
(Eurographics Association, 1987)This paper describes a new antialiasing method when a z-buffer is used. Good quality antialiasing is achieved in spite of unavoidable approximations. Compared to an ordinary z-buffer, only a little extra memory space and ... -
A Fast Ray Tracing Algorithm Using Space Indexing Techniques
(Eurographics Association, 1987)A fast ray tracing algorithm is presented. Spatial coherency is exploited by adopting a linear octree data structure which corresponds to an adaptive partitioning of space. A ray strides over a number of empty regions ... -
A Fast Voxel Traversal Algorithm for Ray Tracing
(Eurographics Association, 1987)A fast and simple voxel traversal algorithm through a 3D space partition is introduced. Going from one voxel to its neighbour requires only two floating point comparisons and one floating point addition. Also, multiple ray ... -
Generative Scene Modelling
(Eurographics Association, 1987)We describe a new theory of scene modelling that includes generative processes as integral components of scene descriptions. A single, uniform treatment of generative processes replaces the variety of ad hoc mechanisms ...