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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Roundness (object) ： ウィキペディア英語版 Roundness (object) Roundness is the measure of how closely the shape of an object approaches that of a circle. Roundness is dominated by the shape's gross features rather than the definition of its edges and corners, or the surface roughness of a manufactured object. A smooth ellipse can have low roundness, if its eccentricity is large. Regular polygons increase their roundness with increasing numbers of sides, even though they are still sharp-edged. Roundness applies in two dimensions. Its analogue in three dimensions is sphericity. In geology and the study of sediments (where three-dimensional particles are most important), roundness is considered to be the measurement of surface roughness and the overall shape is described by sphericity. == Simple definitions == The ISO definition of roundness is based on the ratio between the inscribed and the circumscribed circles, i.e. the maximum and minimum sizes for circles that are just sufficient to fit inside and to enclose the shape.〔ISO 1101〕 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「Roundness (object)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.