SIGGRAPH

Surface mining, though an efficient method of extracting near-surface coal for the nation's mounting energy needs, requires sound reclamation if the harmful environmental impacts of the method are to be held to a tolerable minimum. Another important ...

This paper describes a two-dimensional interactive graphics pre- and post-processor system developed at the U. S. Army Engineer Waterways Experiment Station (WES) for the finite element method (FEM). The paper describes advantages of the data structure ...

An interactive computer graphics system has been developed for online use with a two-stage stereotaxic technique in man. The computer plots sagittal sections approximating the region of the brain being stimulated on a display screen located in the ...

Various approaches to explicit and implicit control of time and motion in procedural real-time graphic packages and languages are discussed and illustrated. The particular approach of independentty defining static objects and dynamic attribute is ...

One of the major functions of State and Federal Public Health agencies is the collection and maintenance of large amounts of data. The utilization of this data for research and planning may be impaired by such factors as: lack of organization and ...

By combining the gaming aspects of interactive, refreshed screen graphics with accurate cost data and realistic schedules, solid front end planning as well as control and monitoring through the life of the building can be achieved. This process enables ...

A program for simple data analysis and report design is described. The design emphasizes flexibility, ease of use, and rapid interactive response. These considerations are discussed in relation to the choices that may be made in the analysis and display ...

An animation software system has been developed at The Computer Graphics Research Group which allows a person with no computer background to develop an animation idea into a finished color video product which may be seen and recorded in real time. The ...

This paper describes an animation package currently under development at the Cornell Program of Computer Graphics.The basic algorithm employed is linear or non-linear interpolation between successive pairs of key frames. These key frames are composed of ...

A technique often employed in animated vector graphics involves the use of a real-time playback mechanism. This technique is an alternative when it is not possible to generate animation frames in real-time. Instead frames are compiled in advance at non-...

This paper presents the design strategy for a crime information system with vast capabilities for production of and experimentationwith maps. Detailed disaggregated crime information from the city of Buffalo, New York forms the primary data base for the ...

The TRANS system is a drill and practice system for the study of transformations of the plane. The system is designed for elementary school pupils (ages 8-10) who have studied the subject in the classroom environment. The system contains exercises on ...

This paper describes the facilities and operation of the Program of Computer Graphics at Cornell University. A variety of graphic procedures are used for both input and output. The laboratory has the capability for producing dynamic vector displays and ...

The capability of generating graphical images on a line printer is very desirable. Many ad hoc special purpose implementations exist that satisfy the needs of particular users. A single general purpose line printer graphics capability, however, ...

This paper describes CAMILL, a system for computer aided milling of ship hull models defined with interactive graphics. The major hardware components of CAMILL are a mini-computer based refresh display and a three axis numerically controlled milling ...

GPGS is a subroutine package offering powerful and versatile support for passive and interactive vector graphics, for time-sharing, batch, and stand-alone minicomputer systems. The package is computer, language, and operating system, as well as display ...

A FORTRAN subroutine SYMBEL is described which enables the drawing of the enhanced graphic characters of Dr. A. V. Hershey on any digital plotting device. Output is by linkage to an external subroutine PLOT. The program operates on any computer with ...

Many systems implement plotter device-independent computer graphics by having a system plot package which outputs a plotter-independent code (here called metacode) and having a translating driver for each plotter which uses this code as input. The ...

The method of parabolic blending for curve and surface interpolation originally conceived by A. W. Overhauser is applied to the interactive free-form design of three dimensional objects. A significant advantage of the algorithm is the user-oriented ...

A major research area in 3-D computer graphics is the inputting of complex descriptions. This paper describes our current attempt at solving that problem: creation of a sculptor's studio-line environment in which the user is provided with various tools ...

The National Mapping Program includes the activities for providing basic map data and a family of general-purpose maps. The U.S. Geological Survey is developing a Digital Cartographic Data Base (DCDB) within the National Mapping Program to include such ...

A program offering a variety of cartographic techniques for mapping gridded data is described. Dot-distribution maps, several forms of contour maps and screen-toned maps are currently implemented for plotter and vector CRT. The structure and logic of ...

Surface display techniques, including contour mapping, usually use an interpolant when data values are on a rectangular grid; but when values are irregularly located some form of assumed or estimated distance-weighting function is often used to estimate ...