Browse Prior Art Database

Marking Primitives of Special Interest in Set-Theoretic Models

IP.com Disclosure Number: IPCOM000100941D
Original Publication Date: 1990-Jun-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 1 page(s) / 44K

Publishing Venue

IBM

Related People

Todd, SJ: AUTHOR [+2]

Abstract

A technique in computer graphics and solid modelling is disclosed in which primitives are marked with processing-specific attributes which concentrate computing resource on to areas of interest for picture production from solid models.

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This is the abbreviated version, containing approximately 72% of the total text.

Marking Primitives of Special Interest in Set-Theoretic Models

       A technique in computer graphics and solid modelling is
disclosed in which primitives are marked with processing-specific
attributes which concentrate computing resource on to areas of
interest for picture production from solid models.

      Solid models consist of a number of primitives of differing
geometries, which may have different colors, textures, etc.,
associated with them.  Yet, in nearly all conventional systems, the
quality of rendering is the same across the whole model.

      Disclosed is the technique of marking primitives of special
interest for enhanced rendering.  In particular:
*  Marking primitives for anti-aliasing, or full-resolution rendering
in a generally low-resolution picture, [in the Winchester Solid
Modelling System (WINSOM)].
*  Marking primitives for especially detailed conversion to wire
frame/polygons in the FastDraw module of WINSOM. The primitives to be
dealt with in this way could be marked:
*  Manually, within the input language.  Obviously, whole sub-models
can be marked at once.
*  Automatically.  A good example of this is a solid character set.
It is well known that typefaces are difficult to read if not
anti-aliased.  In developing applications, such as a high-quality
business graphics utility, a solid character set is necessary.  To
anti-alias a whole picture because it contains a few characters would
be extremely wasteful.

      There...