The article presents information on research into the development of user-friendly computer graphics design programs. The project is intended to make three-dimensional (3-D) and animated computer graphics easy for a n...
详细信息
The article presents information on research into the development of user-friendly computer graphics design programs. The project is intended to make three-dimensional (3-D) and animated computer graphics easy for a non-professional to manipulate. A comparison is made to the spread of software programs which made professional-looking typefaces and printing ubiquitous. The development of prototype programs called Teddysystem and MovingSketch is described. The methods which were used to simplify the computer processing and control inputs are explained.
Nineteen cloth-modeling techniques are summarized and categorized by their main theoretical method: geometrical, physical, or hybrid. Recommendations for future work consider the different goals in textile engineering...
详细信息
Nineteen cloth-modeling techniques are summarized and categorized by their main theoretical method: geometrical, physical, or hybrid. Recommendations for future work consider the different goals in textile engineering and computer graphics.
computer graphics is often confronted with the task of providing the viewer with a visual picture of some object that is too large to fit on a computer screen unless the image is scaled down so drastically that much o...
详细信息
computer graphics is often confronted with the task of providing the viewer with a visual picture of some object that is too large to fit on a computer screen unless the image is scaled down so drastically that much of the detail is lost. The viewer is then asked to work with a partial view of the object, and use a keyboard or a mouse to (a) scroll this image horizontally or vertically, or (b) zoom in or out, or (c) rotate the object. These techniques are strikingly similar to those that the human visual system uses to deal with a similar problem. One crucial difference is that of peripheral vision-the human eye, while concentrating on a small part of the field of vision, still retains a hazy view of the peripheral region preventing it from losing sight of the total picture. This paper argues that the lack of a similar peripheral vision is a major deficiency in computer graphics today. It then goes on to develop a mapping technique that tries to simulate this peripheral vision, and, thereby, make computer graphics more powerful and versatile. The paper analyses the distortions induced by such a mapping, and argues at length why these do not pose serious problems. The suggested mapping is closely related to non-Euclidian geometry;this ties in with the fact established by experimental psychologists over 50 years ago that the perceptual geometry of human vision is strongly non-Euclidian. Thus, if one were to adapt the Turing test for artificial intelligence to computer vision, then non-Euclidian geometry can be expected to play a key role in any attempt to satisfy that test. Building on these ideas, the paper demonstrates that computer graphics has a great deal to learn from non-Euclidian geometry, and that, in tum, computer graphics can contribute significantly to the intelligent application of non-Euclidian geometries to real life problems.
Decisions about which functions to include in systems like PHIGS and GKS-3D are based primarily on the tasks users want performed, such as direct support for 3D operations. The design criteria for device interface sys...
详细信息
Decisions about which functions to include in systems like PHIGS and GKS-3D are based primarily on the tasks users want performed, such as direct support for 3D operations. The design criteria for device interface systems like the computer graphics Virtual Device Interface, however, must be based on what is feasible to do in a device, while still considering how to decompose tasks into hardware-realizable functions. Complicating these design decisions is the wide range of existing device technology and the breadth of usage models imposed by different task-oriented software.
Today's composite materials enable designers to conceive innovative designs with desired response characteristics. However, the process of converting the optimization output obtained from the structural analysis o...
详细信息
Today's composite materials enable designers to conceive innovative designs with desired response characteristics. However, the process of converting the optimization output obtained from the structural analysis of complex composite components into a reliable manufacturable product has remained a laborious and painstaking task. This has lead to large cycle times resulting in reduced cost effectiveness. For reducing the manual effort and for better visualisation of the process a software system, AUTOLAY, has been developed. The aim of this paper is to demonstrate the effective utilization of computer graphics for different aspects of design and manufacture of aircraft composite components using the AUTOLAY system.
Holograms composed from a multiplicity of independent object views, referred to as composite holograms, are discussed. Three techniques, one an extension of old techniques and the others new, are presented. The latter...
详细信息
Holograms composed from a multiplicity of independent object views, referred to as composite holograms, are discussed. Three techniques, one an extension of old techniques and the others new, are presented. The latter are called the direct method and the postrendering method. The direct approach is favored because it uses less disk space. However, it requires somewhat more care because the elemental views rendered are not at all representative of normal object views.
Within the Association of National Research Centers (AGF) in the Federal Republic of Germany, computer graphics is used in a wide range of applications. The coordinating committee “computer graphics” was set up in o...
详细信息
Within the Association of National Research Centers (AGF) in the Federal Republic of Germany, computer graphics is used in a wide range of applications. The coordinating committee “computer graphics” was set up in order to improve coordination of the numerous activities and to facilitate the exchange of information. This paper contains a survey of several important projects which show the role of computer graphics within the AGF and the various possibilities that this field has to offer.
Chemical Abstracts Service (CAS) has developed complex computer-based systems for the registration and retrieval of chemical substance information. This paper focuses on the data structures and computer graphics softw...
详细信息
Chemical Abstracts Service (CAS) has developed complex computer-based systems for the registration and retrieval of chemical substance information. This paper focuses on the data structures and computer graphics software used to represent and process graphical representations of chemical substance information. At CAS the representation of graphical data is standardized and is referred to as the CAS Graphical Data Structure (GDS). The GDS is used for the input and display of chemical structures in the CAS-developed Messenger® search and retrieval software. Messenger software is used to operate the online information retrieval service called STN International®, the scientific and technical information network. STN International provides scientists and information specialists with online access to many different scientific and technical databases. In particular, STN provides access to the CAS ONLINE® Registry File, which currently contains over 8.8 million records of unique chemical substances. This paper surveys the current structure graphics components of the Messenger software. These components provide online structure input and structure display capabilities for the CAS ONLINE Registry File. This paper also introduces the capabilities of a new Personal computer (PC)-based software package called STN Express™. The software includes an offline structure input capability specifically developed for structure query formulation by scientists and information specialists. Possible future extensions to the CAS structure graphics software are also addressed.
computer graphics, interactive techniques, and image processing are among the developments in the constantly evolving computer science field that impact the potential user ever more rapidly. This bibliography attempts...
详细信息
computer graphics, interactive techniques, and image processing are among the developments in the constantly evolving computer science field that impact the potential user ever more rapidly. This bibliography attempts to compile all articles, books, conference papers, and technical reports about computer graphics and man-machine interaction that have been published in English from 1970 to 1975. Because the literature pertaining to computer graphics and man-machine interaction is immense, this bibliography will no doubt be incomplete. Suggestions and contributions for future supplements to the bibliography should be sent to the compiler.
Algorithms for the generation of intricate shapes resulting from numerical iteration are presented. A special convergence test makes possible the production of ornamental patterns useful for study in either science or...
详细信息
Algorithms for the generation of intricate shapes resulting from numerical iteration are presented. A special convergence test makes possible the production of ornamental patterns useful for study in either science or art. This paper differs from others in that it focuses on nonstandard convergence tests.
暂无评论