Method and apparatus for generating display figures with three degrees of freedom
US5091867A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1989 |
| Grant date | Feb 25, 1992 |
| Priority date | — |
| Expiry date | Mar 20, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T11/203
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Apparatus and method for providing x, y an z values so as to construct figures from unit vectors rotated in three space wherein the x, y and z values result from processing construction and rotation parameters according to the following relationships: EQU .DELTA.X'=.DELTA.X COS(G.sub.z)+.DELTA.Y SIN(G.sub.z) EQU .DELTA.Y'=-.DELTA.X SIN(G.sub.z)+.DELTA.Y COS (G.sub.z) EQU .DELTA.Z'=.DELTA.Z where, EQU .DELTA.X=COS(R.sub.z) COS(R.sub.y +G.sub.y) EQU .DELTA.Y=COS(R.sub.z) SIN(R.sub.y +G.sub.y) SIN(G.sub.x)-SIN(R.sub.z) COS(G.sub.x) EQU .DELTA.Z=COS(R.sub.z) SIN(R.sub.y +G.sub.y) COS(G.sub.x)+SIN(R.sub.z) SIN(G.sub.x) EQU X=X+.DELTA.X', Y=Y+.DELTA.Y', Z=Z+.DELTA.Z' and, R.sub.z and R.sub.y are construction rotation parameters for the Z and Y axes, respectively, and G.sub.y, G.sub.x and G.sub.z are global rotation parameters for the Y, X and Z axes, respectively. As used in a graphics display system, the invention provides offset values to an apparatus for summing offset values from a specified point. An apparatus for providing depth cuing related to the offset values may be advantageously included in an alternative embodiment for apparatus employing the principles of the invention. Pro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.