Method and apparatus for generating three-dimensional solid...

G - Physics – 06 – T

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G06T 17/40 (2006.01) G06T 17/10 (2006.01)

Patent

CA 2212100

Method and apparatus for generating a three-dimensional solid model on the basis of three-dimensional wire-frame models, wherein projection boundaries of the fire-frame models are obtained by projection in two or three two-dimensional planes of a three-dimensional rectangular coordinate system, and maximum and minimum coordinate values of each projection boundary in two directions of the axes defining the plane of each projection boundary are determined, and wherein the projection boundaries which have the same maximum and minimum coordinate values in the direction of the common axis of each plane are determined as a set of sweep boundaries, so that the determined sweep boundaries are swept in respective directions perpendicular to the two-dimensional planes, to obtain an intersecting portion of geometries generated by the sweeping of the sweep boundaries, and to determine a three-dimensional solid model on the basis of the intersecting portion.

L'invention est constituée pour une méthode et un appareil de production de modèles volumétriques tridimensionnels basés sur des modèles de fil de fer tridimensionnels. Les frontières de projection des modèles de fil de fer sont obtenues par la projection d'un système de coordonnées rectangulaires tridimensionnel de deux ou trois plans bidimensionnels, et les valeurs maximale et minimale des coordonnées de chaque frontière de projection dans les deux directions des axes qui définissent le plan de chaque frontière de projection sont déterminées. Les frontières de projection qui ont les mêmes coordonnées maximale et minimale dans la direction de l'axe commun de chaque plan sont établies comme ensemble de frontières de balayage dans les directions perpendiculaires aux deux plans bidimensionnels pour obtenir une intersection de géométries engendrées par le balayage des frontières de balayage et pour définir un modèle volumétrique tridimensionnel basé sur cette intersection.

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