hatching

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hatching

In embryology, the separation of the blastocyst from the zona pellucida.
References in periodicals archive ?
Since the VTIN maintains a relatively constant rendered triangle size regardless of scene depth, slope lines, rendered at no more than 1 per triangle, do not coalesce in the background; differences in triangle size (and thus hachure stroke length) are more strongly influenced by local surface variability.
Their successful demonstration of techniques for generating simplified line drawings from photographed 3D objects established a vocabulary for further NPR research on the extraction of edges (rendered as silhouette lines) and components of surface curvature, represented by hachures.
22) Two developments were crucial: indirectly, the invention of the contour line (curved lines of equivalent elevation first used to show the overall form of landmasses on a French map of (1791) and, directly, Johann Georg Lehmann's 1799 invention of shadow-hachures, an arrangement of hachures that emphasized the "transition from level ground to steep gradients.
214-224), on the other hand, provides explicit rules for rendering slope and shadow hachures.
The most significant map-design research on reference maps, as opposed to thematic maps, was carried out on topographic maps, including those symbolized with isolines (contours), hachures, and shaded relief (Eley 1987; Griffin and Lock 1979; Hsu and Robinson 1970; Phillips 1984; Phillips et al.
Le corps se dresse presque droit au dessus, sans indication d'aile ou de queue; le plumage est seulement indique par hachures le long du dos.