POLE-ZERO is computergraphics program for interactive design and analysis of linear feedback systems; analysis is performed by standard s-plane techniques; output options available include closed loop frequency and t...
POLE-ZERO is computergraphics program for interactive design and analysis of linear feedback systems; analysis is performed by standard s-plane techniques; output options available include closed loop frequency and transient responses and root locus for system; POLE-ZERO is written entirely in FORTRAN II for IBM 7094 computer; low-level graphics language, CALLIGRAPH, is used to control graphics hardware and all of display pictures ('%'glyphs'%') are software generated through CALLIGRAPH.
For interactivecomputer systems, most of the communication between users and the computer occurs via the written and graphic information shown on the video display terminal. Let's call that information "the ...
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The Unit framework uses a dataflow programming language to describe interaction techniques for highly interactive environments, such as augmented, mixed, and virtual reality. Unit places interaction techniques in an a...
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ISBN:
(纸本)1581138849
The Unit framework uses a dataflow programming language to describe interaction techniques for highly interactive environments, such as augmented, mixed, and virtual reality. Unit places interaction techniques in an abstraction layer between the input devices and the application, which allows the application developer to separate application functionality from interaction techniques and behavior. Unit's modular approach leads to the design of reusable application-independent interaction control components, portions of which can be distributed across different machines. Unit makes it possible at run time to experiment with interaction technique behavior, as well as to switch among different input device configurations. We provide both a visual interface and a programming API for the specification of the dataflow. To demonstrate how Unit works and to show the benefits to the interaction design process, we describe a few interaction techniques implemented using Unit. We also show how Unit's distribution mechanism can offload CPU intensive operations, as well as avoid costly special-purpose hardware in experimental setups.
To date it has been found, through practical experience with the approximately 30 research users and 70 students using this system, that the startup time for a person trying to develop a research program can be reduce...
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To date it has been found, through practical experience with the approximately 30 research users and 70 students using this system, that the startup time for a person trying to develop a research program can be reduced from approximately six months to less than three weeks. In some cases, this is the only reason the system has been used by a researcher for certain jobs. At the research level, through use of the macro control system, learning how to operate the computer is no longer an obstacle to developing research support programs of an interactive nature. The macro operating system establishes an environment where the user is free to pursue the research project at hand without becoming enmeshed in the details of system operation. Embodied in the macro system is the continued possibility for further learning by the user, but such learning is neither forced nor necessary. The user is free to digest as much or as little of the detail of system operation as desired. However, since only necessary operating information is encountered, total systems learning proceeds rapidly, and the user is not over-burdened with information irrelevent to his area of endeavor. In addition, users who have been trained in the use of the system have been able to return to it after absences of four months or more and immediately resume their systems interaction at both the hardware and software levels with no aid forthcoming or required. At the systems development level, major changes in the layout of the computer software environment may be made by the systems programming staff without disturbing the active user performance. The self-documenting system and machine readable manuals can be continually enhanced to strengthen the user's ability to retain necessary written support information. Because the system allows the on-line modification or addition of control programs as well as the bypassing of interaction, the system and the user can be matured concurrently. In course work, this appro
The proceedings contain 56 papers. The topics discussed include: a tool for visualizing the topology of three-dimensional vector fields;visualizing causal effects in 4D space-time vector fields;fast rotation of volume...
ISBN:
(纸本)0818622458
The proceedings contain 56 papers. The topics discussed include: a tool for visualizing the topology of three-dimensional vector fields;visualizing causal effects in 4D space-time vector fields;fast rotation of volume data on data parallel architectures;computer assisted sphere packing in higher dimensions;the asymptotic decider: resolving the ambiguity in marching cubes;the virtual windtunnel: an environment for the exploration of three-dimensional unsteady flows;volume rendering of flow-visualization point data;visualization of equations in an interactive environment;spam filtering: an optimization scheme for volume visualization of large finite element models;two widely-different architectural approaches to computer image generation;scientific visualization from inside the metacomputer;acoustic imaging: the reconstruction of underwater objects;and achieving direct volume visualization with interactive semantic region selection.
The minimum remote graphic intelligent terminal must be able to perform some graphic and support operations to decrease response time, reduce communications, and reduce host cpu time by moving device dependent operati...
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ISBN:
(纸本)9781450373548
The minimum remote graphic intelligent terminal must be able to perform some graphic and support operations to decrease response time, reduce communications, and reduce host cpu time by moving device dependent operations to the intelligent terminal. In developing such a system a minimum set of graphic functions should be implemented and evaluated with regard to resource utilization in the mini-computer. Based on the evaluation, additional functions may be added to make use of available resources. It is the authors' opinion that two areas show the greatest potential for attacking the division of labor problem between the host and mini: 1. Simple control logic should be added to the current director codes. This logic should be specified by the application to be invoked via events in the intelligent terminal. The events are an extension of the method used for attention handling. Since the resource utilization for director codes was minimal this addition should use up the remaining resources. An example of the type cf control to be added is a simple form of the DO CASE and DO WHILE statements described in the MALUS language(7). 2. In addition to the control logic a simple means of recording a set of director codes should be considered. This involves adding SAVE and REPLAY director codes. Thus, complicated menus need not be re-transmitted. Menu stacking and selection logic will also be provided. Resource utilization involves the code necessary to handle recording and replay, and the space required for the pictures and associated control logic. Since insufficient resources remain for this, auxiliary storage (e.g. a disc) must be added. The system described did fulfill out design expectations in providing low cost remotable graphics and will be used in a production environment. It has also provided a sound framework for developing increased function for an intelligent graphics satellite.
Meshless deformation based on shape matching is a new technique for simulating deformable objects without requiring mesh connectivity information. The approach focuses on speed, ease of use and stability at the expens...
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ISBN:
(纸本)9783540896814
Meshless deformation based on shape matching is a new technique for simulating deformable objects without requiring mesh connectivity information. The approach focuses on speed, ease of use and stability at the expense of physical accuracy. In this paper we introduce improvements to the technique that increase physical realism and make it more suitable for use in interactive real-time environments such as games and virtual surgery applications. We also present intuitive real-time interaction techniques for picking, pushing and cutting objects simulated using meshless deformation based on shape matching. For deformable collision detection and response, we present a new method for surface meshes based on previous volumetric methods.
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