en
In mathematics and its applications, the signed distance function or signed distance field (SDF) is the orthogonal distance of a given point x to the boundary of a set Ω in a metric space (such as the surface of a geometric shape), with the sign determined by whether or not x is in the interior of Ω. (Wikipedia, CC BY-SA)
fr
En mathématiques, la fonction distance signée ou la fonction distance orientée d’un ensemble. (Wikipedia, CC BY-SA)
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