Accession Number : AD0753673

Title :   Computer Assisted Assembly and Rendering of Solids.

Descriptive Note : Technical rept.,

Corporate Author : UTAH UNIV SALT LAKE CITY INFORMATION RESEARCH LAB

Personal Author(s) : Romney,Gordon Wilson

Report Date : SEP 1969

Pagination or Media Count : 270

Abstract : The objective of the paper is to describe a technique that produces shaded renderings of solids; and to describe an assembly procedure which may be used to assemble representations of 3-D objects in such a way that they can be photographically rendered. The algorithm that is used to produce photographic renderings may be subdivided into two parts -- (1) the visible surface procedure that determines which surfaces are visible and which are invisible and retains the description of only the visible surfaces, and (2) the shader which varies the tonal gradation on all visible surfaces. The assembly procedure is a tool that allows a user to form, manipulate and photographically render 3-D objects. A set of primitive structures described by planar triangles are used as the 3-D object building-set. Both the rendering and assembly procedures are presently operational software programs written in a combination of Fortran V and UNIVAC 1108 Assembly Language. (Author)

Descriptors :   (*DATA PROCESSING, GRAPHICS), (*COMPUTER PROGRAMMING, STEREOSCOPIC DISPLAY SYSTEMS), ALGORITHMS, PROJECTIVE GEOMETRY, TRANSFORMATIONS(MATHEMATICS), MATRICES(MATHEMATICS), QUEUEING THEORY, COLORING, OPERATORS(MATHEMATICS), PHOTOGRAPHY, INPUT OUTPUT DEVICES, REAL TIME, THESES

Subject Categories : Computer Programming and Software
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE