EP0488578A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Enhanced computer aided design shading
Assignee: Dassault Systemes of America Corp
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Filing: 1991-11-20
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Granted: —
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Expires: 2011-11-20
Abstract
Abstract Disclosed herein is a design system for designing, dynamically changing and displaying design drawings. The invention allows a user to select a solid object from a display as the current, active object. The user then selects a surface to present in the foreground. The system then modifies the display data structure to accentuate the foreground surface by modifying the illumination of individual pixels. This technique gives the effect of shading areas on the display to highlight important characteristics of the drawing.
Inventors
- 👤 Liangpin Chen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 18:18
CPC Classifications
G; G06; G06T; G06T15/00; G06T15/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
77 words
Apparatus for performing a set of display operations to modify a three dimensional drawing on a graphic display, comprising: (a) means for storing information defining a three dimensional drawing on the graphic display; (b) means for generating a drawing on the graphic display based on the information; (c) means for selecting a surface of the drawing; (d) means for modifying the information and displaying the drawing with the selected surface appearing in the foreground of the display.
Claim 2
Dependent Claim
26 words
Apparatus as recited in claim 1, further comprising means for storing three dimensional drawing information for realistic shading of three dimensional surfaces on a graphic display.
Claim 3
Dependent Claim
20 words
Apparatus as recited in claim 1, further comprising predefined rules for modifying the information based on the type of surface.
Claim 4
Dependent Claim
19 words
Apparatus as recited in claim 1, further comprising means for modifying the illumination of individual pixels on the display.
Claim 5
Dependent Claim
22 words
Apparatus as recited in claim 1, further comprising means for specifying the location where the drawing should appear on the graphic display.
Claim 6
Dependent Claim
23 words
Apparatus as recited in claim 1, further comprising means for modifying the information based on knot sequences for individual splines of the drawing.
Claim 7
Independent Claim
73 words
A method for performing a set of display operations to modify a three dimensional drawing on a graphic display, comprising the steps of: (a) storing information defining a three dimensional drawing on the graphic display; (b) generating a drawing on the graphic display based on the information; (c) selecting a surface of the drawing; (d) modifying the information and displaying the drawing with the selected surface appearing in the foreground of the display.
Claim 8
Dependent Claim
20 words
A method as recited in claim 7, further comprising the step of storing three dimensional drawing information in data structures.
Claim 9
Dependent Claim
24 words
A method as recited in claim 7, further comprising the step of predefining rules for modifying the information based on the type of surface.
Claim 10
Dependent Claim
21 words
A method as recited in claim 7, further comprising the step of modifying the illumination of individual pixels on the display.
Claim 11
Dependent Claim
24 words
A method as recited in claim 7, further comprising the step of specifying the location where the drawing should appear on the graphic display.
Claim 12
Dependent Claim
25 words
A method as recited in claim 7, further comprising the step of modifying the information based on knot sequences for individual splines of the drawing.
References Cited (Backward Citations)
No citation records indexed.
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