초록 ▼

Techniques are developed for defining an engine which has as its input two-dimensional drawing views, wherein the engine produces a three-dimensional geometric solid. The engine comprises, among other things, a set of rules for identifying particular elements within the various two-dimensional views

Techniques are developed for defining an engine which has as its input two-dimensional drawing views, wherein the engine produces a three-dimensional geometric solid. The engine comprises, among other things, a set of rules for identifying particular elements within the various two-dimensional views, and for determining the useful relationships between elements (e.g., arcs, lines, and the like) in one view vis-a-vis related elements in another view, to thereby ascertain the three-dimensional form defined by these elements and their corresponding relations to other elements.

대표청구항 ▼

[ I claim:] [1.] A method of generating and displaying a three-dimensional geometric solid from two-dimensional drawing data using a digital computer, wherein said two-dimensional drawing data comprises a plurality of geometric entities, comprising the steps of:(a) segregating said geometric entitie

[ I claim:] [1.] A method of generating and displaying a three-dimensional geometric solid from two-dimensional drawing data using a digital computer, wherein said two-dimensional drawing data comprises a plurality of geometric entities, comprising the steps of:(a) segregating said geometric entities into a plurality of respective view sets, wherein said segregating step comprises the steps of:grouping said geometric entities into closed curve sets, open curve sets and disjoint curves;ordering said closed curve sets as a function of area;computing a center of gravity for each of said closed curve sets;grouping at least one of said closed curve sets into a unique one of said view sets in accordance with said ordering step, said computing step, and whether said curve set makes contact with another of said closed curve sets;grouping at least one of said open curve sets into a unique one of said view sets by identifying a closed curve set with which it makes contact; andgrouping each of said disjoint curves into a unique one of said view sets by identifying a closed curve set with which it makes contact;(b) automatically identifying a plurality of relational constraints associated with said geometric entities; and(c) automatically generating and displaying said three-dimensional geometric solid in accordance with said segregating and defining steps.