摘要:

AbstractIn this paper the design and development of a graphic programming system to be relied on KAΔMOΣ are described. The system architecture upresented together with the functionality of construction and manipulation of the geometric entities. The environment provides an homogeneous handling of both 2D and 3D objects, these last being represented in a complete solid modelling scheme. Handling is achieved through a set of operators designed to manipulate geometric entities in a way suitable to hide users the implementation details of the specific representation domain. Prolog has been used as a common language to implement both the geometric entities supported by a hierarchical construction and their shape constraint

ISSN:0167-7055    

DOI:10.1111/1467-8659.1110003

出版商:Blackwell Science Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractThe first ISO/IEC standard for computer graphics, the Graphical Kernel System (GKS) was published in August 1985. In accordance with ISO/IEC procedures, GKS is now being reviewed and revised. This paper describes how formal specification techniques are being used by the authors to analyse key parts of proposals being made for changes to the framework of GKS to bring the standard into line with the requirements of applications and the operating environment likely to be found in the mid‐1990'

ISSN:0167-7055    

DOI:10.1111/1467-8659.1110017

出版商:Blackwell Science Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractActual computer image and motion synthesis paradigms are presented in order to introduce a new computer animation paradigm that simulates the traditional pinscreen animation technique. Pinscreen is a very particular and difficult device that enables a “chiaroscuro” approach to image synthesis. The paper describes the traditional pinscreen technique, the way it is operated, results and related difficulties. An extended computer model, including colour and time extensions, to simulate the pinscreen is presented. Results achieved with vector and raster approaches are discussed. Advantages and possibilities of the method when compared with the traditional method and the problems that arise from this technique will also be explained. Finally current and future work is referen

ISSN:0167-7055    

DOI:10.1111/1467-8659.1110031

出版商:Blackwell Science Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractOver the last several years the authors have used computer graphics to generate, study and analyze more than 300 Islamic geometrical repeat patterns. These patterns offer a rich source for exploitation by artists and are also of interest to mathematicians, crystallographers, architects, archaeologists and others. They can serve as elegant test beds for research into hierarchical programming and texture mapping. The paper discusses the evolution of classical geometric methods for Islamic patterns and goes on to develop algorithms based on group theory for efficient generation of all crystallographic repeat patterns using modern computer graphics.

ISSN:0167-7055    

DOI:10.1111/1467-8659.1110043

出版商:Blackwell Science Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractExisting standards for three‐dimensional graphic representations are unable to produce any realistically shaded images (except PHIGS PLUS, which provides discrete shading only). Ray Tracing or Radiosity are not taken into account up to this time.This article is intended to show one way to integrate the Ray Tracing technique into the pipeline of the graphics standards GKS‐3D and PHIGS. No modifications of the viewing concepts are required by our implementat

ISSN:0167-7055    

DOI:10.1111/1467-8659.1110055

出版商:Blackwell Science Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractWith the help of computer graphics, the chaotic behaviour of an ecological model in the complex plane has been investigated. Convergence maps that show multi‐fractal characteristics (science) and beautiful patterns (art) are presente

ISSN:0167-7055    

DOI:10.1111/1467-8659.1110061

出版商:Blackwell Science Ltd    

年代:1992

数据来源: WILEY