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2006•Machinery Design and ManufactureRequires access

Development of surface area calculation function based on VBA for AutoCAD

Yi Li

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Abstract

A surface area calculation function is developed based on VBA for AutoCAD. Because surfaces in AutoCAD are wire-frame-modeled Polygonmeshs, the area query command AREA can not apply to them. According to characteristics of Polygonmesh, it is exploded to little facets. Then all the facets' areas are add up for approximation to surface area. The means for improving accuracy are also studied. Practice proved that this method has certain accuracy and can meet the needs in engineering.

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What this paper is about

A surface area calculation function is developed based on VBA for AutoCAD. Because surfaces in AutoCAD are wire-frame-modeled Polygonmeshs, the area query command AREA can not apply to them. According to characteristics of Polygonmesh, it is exploded to little facets. Then all the facets' areas are add up for approximation to surface area. The means for improving accuracy are also studied. Practice proved that this method has certain accuracy and can meet the needs in engineering.

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Available abstract

A surface area calculation function is developed based on VBA for AutoCAD. Because surfaces in AutoCAD are wire-frame-modeled Polygonmeshs, the area query command AREA can not apply to them. According to characteristics of Polygonmesh, it is exploded to little facets. Then all the facets' areas are add up for approximation to surface area. The means for improving accuracy are also studied. Practice proved that this method has certain accuracy and can meet the needs in engineering.

Key concepts: Visual Basic for Applications, Surface (topology), Function (biology), Computer science, Engineering drawing, Frame (networking), Computer graphics (images), Engineering

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