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Record Details

Record 29 of 24914
Interactive display of molecular models using a microcomputer system
External Online Source: doi:10.1016/0010-468X(80)90067-7
Author and Affiliation:
Egan, J. T.(NASA Ames Research Center, Moffett Field, CA, United States)
Macelroy, R. D.(NASA Ames Research Center, Moffett Field, CA, United States)
Abstract: A simple, microcomputer-based, interactive graphics display system has been developed for the presentation of perspective views of wire frame molecular models. The display system is based on a TERAK 8510a graphics computer system with a display unit consisting of microprocessor, television display and keyboard subsystems. The operating system includes a screen editor, file manager, PASCAL and BASIC compilers and command options for linking and executing programs. The graphics program, written in USCD PASCAL, involves the centering of the coordinate system, the transformation of centered model coordinates into homogeneous coordinates, the construction of a viewing transformation matrix to operate on the coordinates, clipping invisible points, perspective transformation and scaling to screen coordinates; commands available include ZOOM, ROTATE, RESET, and CHANGEVIEW. Data file structure was chosen to minimize the amount of disk storage space. Despite the inherent slowness of the system, its low cost and flexibility suggests general applicability.
Publication Date: Dec 01, 1980
Document ID:
19810057734
(Acquired Nov 30, 1995)
Accession Number: 81A42138
Subject Category: COMPUTER OPERATIONS AND HARDWARE
Document Type: Journal Article
Publication Information: Computer Programs in Biomedicine; 12; Dec. 198
Publisher Information: Netherlands
Financial Sponsor: NASA; United States
Organization Source: NASA Ames Research Center; Moffett Field, CA, United States
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: COMPUTER GRAPHICS; COMPUTER SYSTEMS DESIGN; DISPLAY DEVICES; MICROCOMPUTERS; MOLECULAR STRUCTURE; ARCHITECTURE (COMPUTERS); BASIC (PROGRAMMING LANGUAGE); LARGE SCALE INTEGRATION; MICROPROCESSORS; PASCAL (PROGRAMMING LANGUAGE); TECHNOLOGY UTILIZATION
Imprint And Other Notes: Computer Programs in Biomedicine, vol. 12, Dec. 1980, p. 203-211.
Miscellaneous Notes: p. 203-211
Availability Source: Other Sources
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