EP0168981A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method and apparatus for spherical panning
Assignee: Tektronix Inc
•
Filing: 1985-06-19
•
Granted: —
•
Expires: 2005-06-19
Abstract
Abstract A graphics display terminal performs a pan operation with respect to a view motion center to effectuate spherical panning. Three dimensional instructions stored in terminal memory are retransformed in accordance with a panned direction.
Inventors
- 👤 William G. Waller
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 18:03
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/14; G06F3/153; G06T; G06T15/00; G06T15/10; G06T15/20; G06F3/01; G06F3/048; G06F3/0484; G06F3/04845
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
The method of providing a graphics display including the capability of panning around an object to provide views from various directions, comprising: inputting and storing graphics information identifying a three dimensional object, forming a two dimensional image of said object in response to said graphics information, inputting further information defining a panning movement about a view motion center, said view motion center being positioned with respect to said image of said object, processing said graphics information and said further information for transforming said graphics information to describe a view from the panned direction, and forming a two dimensional second image in response to said transformed graphics information, said second image presenting said object as viewed from the panned direction.
Claim 2
Independent Claim
119 words
The method of providing a graphics display including the capability of panning around an object to provide views from various directions, comprising: inputting and storing graphics information identifying a three dimensional object, forming a two dimensional image of said object in response to said graphics information, inputting further information defining a panning movement about a view motion center, said view motion center being positioned with respect to said image of said object, processing said graphics information and said further information for transforming said graphics information to describe a view from the panned direction, and forming a two dimensional second image in response to said transformed graphics information, said second image presenting said object as viewed from the panned direction.
Claim 3
Dependent Claim
33 words
The method according to claim 1 wherein said processing of said graphics information for transforming said graphics information to describe a new view includes recalculating view directional parameters to provide transform input information.
Claim 4
Dependent Claim
54 words
The method according to claim 1 including inputting further information regarding a zoom command relative to said three dimensional object, and processing said graphics information and said further information regarding said zoom command relative to said three dimensional object for transforming said graphics information to describe a view with a differing degree of magnification.
Claim 5
Dependent Claim
165 words
A graphics display terminal capable of performing a pan operation on a displayed image to produce a resultant image as viewed from a different direction, said terminal being responsive to instructions for producing said displayed image, comprising: input means for introducing information into said graphics display terminal relative to latitude and longitude changes of a pan about a center point, means responsive to said instructions and to said information introduced via said input means for performing processing operations on said instructions, said processing operations implementing said latitude and longitude changes of a pan about said center point by transforming said instructions to describe a view in the panned direction, means responsive to the processing operations performed by the processing means for building a pixel representation of the transformed view, converting means responsive to said pixel representation built by the building means for converting said pixel representation into signals representative of said transformed view, and display means responsive to said signals for displaying the transformed view.
Claim 6
Dependent Claim
165 words
A graphics display terminal capable of performing a pan operation on a displayed image to produce a resultant image as viewed from a different direction, said terminal being responsive to instructions for producing said displayed image, comprising: input means for introducing information into said graphics display terminal relative to latitude and longitude changes of a pan about a center point, means responsive to said instructions and to said information introduced via said input means for performing processing operations on said instructions, said processing operations implementing said latitude and longitude changes of a pan about said center point by transforming said instructions to describe a view in the panned direction, means responsive to the processing operations performed by the processing means for building a pixel representation of the transformed view, converting means responsive to said pixel representation built by the building means for converting said pixel representation into signals representative of said transformed view, and display means responsive to said signals for displaying the transformed view.
Claim 7
Dependent Claim
190 words
A graphics display terminal capable of performing a pan and zoom operation on a displayed image in three dimensions to produce a resultant panned and zoomed image, said terminal being responsive to instructions for producing said displayed image, comprising: input means for introducing information into said graphics display terminal related to latitude and longitude changes of a pan about a view motion center, and for also introducing information related to a desired zoom of said image, means responsive to said instructions and to said information introduced via said input means for performing processing operations on said instructions, said processing operations implementing said latitude and longitude changes of a pan about a view motion center and said desired zoom information by recalculating view directional parameters and providing a transform of said instructions, means responsive to the processing operations performed by the processing means for building a pixel representation of said resultant panned and zoomed image, converting means responsive to said pixel representation built by the building means for converting said pixel representation into signals representative of the resultant image, and display means responsive to said signals for displaying said resultant image.
Claim 8
Dependent Claim
190 words
A graphics display terminal capable of performing a pan and zoom operation on a displayed image in three dimensions to produce a resultant panned and zoomed image, said terminal being responsive to instructions for producing said displayed image, comprising: input means for introducing information into said graphics display terminal related to latitude and longitude changes of a pan about a view motion center, and for also introducing information related to a desired zoom of said image, means responsive to said instructions and to said information introduced via said input means for performing processing operations on said instructions, said processing operations implementing said latitude and longitude changes of a pan about a view motion center and said desired zoom information by recalculating view directional parameters and providing a transform of said instructions, means responsive to the processing operations performed by the processing means for building a pixel representation of said resultant panned and zoomed image, converting means responsive to said pixel representation built by the building means for converting said pixel representation into signals representative of the resultant image, and display means responsive to said signals for displaying said resultant image.
Claim 9
Dependent Claim
46 words
The graphics display terminal according to claim 5 wherein said processing operations implementing said latitude and longitude changes of a pan about a view motion center by recalculating view directional parameters include calculating a view reference point and a viewing direction from said view reference point.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.