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Cobalt is a parametric-based computer-aided design (CAD) and 3D modeling program that runs on both Macintosh and Microsoft Windows operating systems. The program combines the direct-modeling way to create and edit objects (exemplified by programs such as SpaceClaim) and the highly structured, history-driven parametric way exemplified by programs like Pro/ENGINEER. A product of Ashlar-Vellum, Cobalt is Wireframe-based and history-driven with associativity and 2D equation-driven parametrics and constraints. It offers surfacing tools, mold design tools, detailing, and engineering features. Cobalt includes a library of 149,000 mechanical parts.〔(【引用サイトリンク】url=http://www.ashlar.com/3d-modeling/3d-modeling-cobalt-features.html )〕 Cobalt's interface, which the company named the "Vellum interface" after its eponymous flagship product, was designed in 1988 by Dr. Martin Newell (who created the Utah teapot in 1975 and went on to work at Xerox PARC, where the WIMP paradigm for graphical user interfaces was invented) and Dan Fitzpatrick. The central feature of the Vellum interface is its "Drafting Assistant", which facilitates the creation and alignment of new geometry. Cobalt has received praise for its free-form surfaces on solid modeled objects. == Design == The distinguishing characteristics of Cobalt are its ease of use and quick learning curve for new users.〔 (【引用サイトリンク】title=2D and Solid Modeling Speeds Design of Heart Rate Monitor Watch )〕 Cobalt inherited its 2D and 3D wireframe features from "Vellum". However, with Cobalt, wireframe geometry—which does not have to be planar—can be subsequently revolved or extruded relative to any plane or along a curved path to create 3D solids. Cobalt also allows 3D objects to be created directly using 3D tools while still retaining the designer's ability to edit those objects via history-driven parametrics and later to add further constraints. Both types of solids—extruded 2D wireframe and directly created 3D solids—can be seamlessly mixed in the same drawing. Whereas most history-based parametric solid modelers require the designer to rigorously follow a logical progression while creating models and tend to require that the designer think ahead about the planned order of transmutations of the solid model, Cobalt has a more freeform, less structured way of solid modeling that the developer refers to as "Organic Workflow".〔(【引用サイトリンク】title=Organic Workflow™ for 3D Modeling )〕 Cobalt's less structured modeling environment coupled with an integral ray-tracing capability makes it suitable for brainstorming and product development.〔 The program's history-driven modeling and equation-driven parametrics and constraints permit designers to edit the dimensions and locations of key features in models without the need for major redesign—much like changing the value of a single cell in a complex spreadsheet. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cobalt (CAD program)」の詳細全文を読む スポンサード リンク
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