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Freeform surface modelling is a technique for engineering freeform surfaces with a CAD or CAID system. The technology has encompassed two main fields. Either creating aesthetic surfaces (class A surfaces) that also perform a function; for example, car bodies and consumer product outer forms, or technical surfaces for components such as gas turbine blades and other fluid dynamic engineering components. The second method is direct creation of the surface with manipulation of the surface poles/control points.

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  • Freeform surface modelling (en)
  • Superficie di classe A (it)
  • 自由曲面モデリング (ja)
  • Superfície classe A (pt)
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  • A superfície classe A é um padrão, de máxima de qualidade, que se aplica à modelagem de produtos, dentro de parâmetros industriais. O processo utiliza o método de modelagem matemática. Essas superfícies são tidas como superfícies perfeitas (continuidade G4). Existem softwares especializados na análise e modelagem de superfícies classe A como o Icem Surf. (pt)
  • Freeform surface modelling is a technique for engineering freeform surfaces with a CAD or CAID system. The technology has encompassed two main fields. Either creating aesthetic surfaces (class A surfaces) that also perform a function; for example, car bodies and consumer product outer forms, or technical surfaces for components such as gas turbine blades and other fluid dynamic engineering components. The second method is direct creation of the surface with manipulation of the surface poles/control points. (en)
  • Superficie di Classe A è un termine usato nel gergo dei progettisti indicante una superficie di stile, ottenuta dall'unione di più superfici a forma libera, che presenta continuità di tangenza e curvatura in corrispondenza di tutti i bordi di unione, creando una superficie di design, maneggiabile e non pericolosa o offensiva fisicamente in caso di contatto/urto. Un esempio è la carrozzeria dell'automobile che risulta superficie di Classe A in tutto l'esterno (eccetto il sottoscocca), le plastiche interne (cruscotto, maniglie e tutto ciò che è studiato per essere maneggiato), mentre non è superficie di Classe A dove sono presenti protuberanze o forme offensive in caso di contatto/urto come le parti meccaniche nel vano motore, viti e perni di fissaggio o tutto ciò che non è studiato per l'us (it)
  • 自由曲面モデリング(Freeform surface modelling)とは、CAD(コンピュータ支援設計)や(コンピュータ支援工業デザイン)を用いて自由曲面(freeform surface)を制御する技術である。 この技術は、主に2つの分野において使われて来た。一つは「クラスAサーフェス」と呼ばれる高品位なサーフェスの作成で、例えば自動車のボディや消費者向け製品などの外見のフォルムを作成する際に効果を発揮する。もう一つは工学的な精密さを求められる構成部品のサーフェスの作成で、例えばガスタービンのブレードやその他の流体力学的な精密機械の構成部品などである。 CADソフトで自由曲面を生成するに当たっては、主に2つの方法が使用される。一つはスプライン曲線をベースとする方法で、まずスプライン曲線を生成し、それをガイド線として掃引体を生成(「スイープ」、断面を元に押し出す)するか、もしくはスプラインによる2つの断面外形線を連結するようなサーフェスを生成(「ロフト」)する方法である。 もう一つはサーフェスの制御点を操作してサーフェスを直接生成する方法である。 (ja)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Surface_modelling.svg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Blend1.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Blend1a.gif
  • http://commons.wikimedia.org/wiki/Special:FilePath/Ff_surface3_t.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Freeform1.gif
  • http://commons.wikimedia.org/wiki/Special:FilePath/Geometric_continuity.png
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