Showing papers on "Computer graphics lighting published in 1982"

Fundamentals of interactive computer graphics

Abstract: Fundamentals of interactive computer graphics , Fundamentals of interactive computer graphics , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی

A New Color-Namiing System for Graphics Languages

Abstract: An English-based color notation system, designed for computer graphics applications, proved easier to learn and more accurate than quantitative systems.

GKSamdash;The First Graphics Standard

Abstract: For the first time, an international graphics standard is possible. After years of research and redesign, the GKS emerges as the most likely candidate.

Computer graphics generator

Abstract: Electronic circuitry for generation of graphics images on a computer display screen is disclosed which allows graphics capability to be added or retrofitted to computers having standard video display character generation circuitry. The graphics circuitry receives address, data and control signals from the normal computer peripheral bus. Address signals received by the graphics circuitry are interpreted as command signals and, in accordance with the command signals, data present on the computer peripheral data bus is interpreted either as graphics data to be written in a random access graphics memory or as an address location for such data in the memory. The graphics circuitry normally operates asynchronously with respect to the computer under control of the character clock generated by the character generation circuitry. Proper synchronization with computer operation is achieved by using wait commands which cause the computer circuitry to cease processing temporarily while write or read operations are being processed by the graphics circuitry. In addition, special circuitry is provided which allows the graphics circuitry to automatically increment and decrement address information stored within the circuitry.

Tutorial, computer graphics

Abstract: Figure 10. This example shows that p 2 has separation properties different from E2. By juxtaposing a description of homogeneous coordinates as used in computer graphics with a topological description of projective planes, this article has documented their equivalence. The ostensibly benign conventions imposed in the use of homogeneous coordinates effectively convert E3 to the projective plane P3. Although they may seem interchangeable locally, these spaces exhibit significantly different separation properties. A single plane like z = 0 does not separate P3 as it does E3, so clipping algorithms must take this into account.2 A computer graphics user who thinks that he is modeling E3 may encounter mysterious ambiguities over different line segments connecting the same two points in P3. The mystery is satisfactorily solved if we recognize that computer graphics attempts to model E3 by using P3. A person who wants to develop an algorithm using homogeneous coordinates for computer graphics should be aware of the discrepancies between the two realms, lest he risk anomolous behavior of the algorithm caused by lines passing through infinity and returning behind the viewer.

Real-Time Animation of Human Figure Drawings with Hidden Lines Omitted

Abstract: Using a graphics system called NUDES, researchers in Australia are investigating just how well polyellipsoid human figures work in real-time vector and raster graphics displays.

An interactive graphics environment for architectural energy simulation

Abstract: An interactive computer graphics system has been developed for the architecture profession which provides a “design environment” for the evaluation of building energy consumption. The system includes an integrated set of graphic input tools which generate the geometric and attribute data necessary for the determination of thermal load in buildings. In addition, a comprehensive set of graphical output routines has been created to allow the designer to visually interpret the results of alternative design strategies.

Image Handling In Two-Dimensional Design

Abstract: A research team in England has developed an image manipulation system that enables graphics designers to work creatively with visual ambiguities.

Simulation and graphics on microcomputers

Abstract: It is difficult to relate the output of a simulation model to the physical system it describes. Graphic representa tions of results can make simulations more credible and more interesting. On most large computers, how ever, there are software and hardware barriers between the user and graphical output. Microcomputers, on the other hand, are easy to use, and simple graphics are easy to produce without help from a programmer or systems specialist. Examples show bar charts, snap shots, dot plots, bit density plots, and contour plots of simulation results generated using an Atari 800 micro computer, a color television, and an Epson MX-80 printer (costing about $600) with graphics capability. All the user must do to obtain such plots is write short programs (less than 100 statements) in BASIC.

An Overview of 3D Graphics

Abstract: Almost every major application of computers requires the construction and manipulation within the computer of a model representing some entity or artefact in the outside world which is being designed or analysed. Often a single model is inadequate for all the different manipulations that are required, so several different models of the same object may be constructed, with transformations defined between them. (This is common, for example, in geometric modelling.)

Computer Graphics Applications in Japan

Abstract: Grpahic displays fall into three categories, as is already well known. Two of them are storage and vector scan displays. The third is the raster scan terminal, which is widely used today because of its low cost. Though some of these kinds of terminals are imported from the USA, vector and raster scan displays, personal computers and image processors are currently being manufactured by Japanese computer mainframe and graphics equipment manufacturers. Terminals made in Japan are highly appreciated by graphics users. This popularity is due to their high reliability, versatility and short lead time between ordering and delivery.

TASC Graphics Software Package.

Abstract: : The interactive TASC Graphics Software Package (TGSP), developed at TASC, is based on NCAR Graphics Software The basic NCAR Graphics Software has been extensively modified to allow for interactive color graphics Many enhancements have also been made to meet the needs of the Weapons Support System (WSS) This document contains a general description of all modifications and enhancements which are contained in the TGSP TGSP is used extensively in the applications software generated for the Weapon Support System Additional keywords: Subroutines; Man computer interface; WRITEB computer program

Computer Graphics Software Workshop Report

Abstract: White was arguably the predominant colour at the IUSC Package Workshop held at the University of Leicester UK in January, as the East Midlands snow descended. But inside Stamford Hall, there was colour and animation as over one hundred delegates heard about and saw the latest developments in computer graphics software in this latest of the regular six-monthly Package Workshops organised by the Inter-University Software Committee.

Chips of many colors

Abstract: A large number of available color display tools generally fall into three categories. Intelligent terminals offer a wide range of color grpahics capability but require extensive software for specific applications. Large turn-key graphics systems, with color display consoles controlled by software, were made for electronic design. In color CAD workstations, color graphics is under hardware control and offers specific features for IC design. The authors look at the various colour graphics systems, and their advantages in VLSI chip design.