System for texturing computer graphics images
US4855934A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1986 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Oct 3, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/04
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for rendering a spacial contour texture map onto a generally planar polygon for display on the screen of a video monitor in a computer graphic system includes a memory for storing spacial distance measures between the individual texels of the contour texture map and a boundary on the contour texture map as well as an indentifier flag to define whether the texel is on one side of the boundary or the other. The contour texture map is applied to a modeled polygon by computing the intersection of each direction vector extending from an eyepoint through the center of a selected pixel to the contour texture map in a map space coordinate system. The projected size of a pixel on the contour texture map is also computed. The distance between the intersection point of each direction vector and the boundary of the contour texture map is computed and is projected onto the pixel space, that is, the screen of the display monitor. If the projected distance between the intersection point and the boundary in pixel space is on one side of the boundary, a first texture value is assigned to the pixel for display. If the projected distance from the intersection point to the bounda…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.