Method and devices for projecting two-dimensional patterns...

B - Operations – Transporting – 44 – D

Patent

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B44D 2/00 (2006.01)

Patent

CA 2665617

The method and the devices according to the invention are aimed at optimizing the projection of a two-dimensional pattern onto the surface of a three-dimensional object. After having defined an original curve on the two-dimensional pattern and a projection curve (600, 800) on the surface of the three-dimensional object, a point of the pattern is selected (610, 810). The abscissa of the projection of the selected point is determined according to the abscissa of the selected point and according to a first projection ratio (615, 815). Likewise, the ordinate of the projection of the selected point is determined according to the ordinate of the selected point and according to a second projection ratio (620, 820). A projection plane is then determined. This projection plane comprises the point of the projection curve that is determined by the abscissa of the projection of the selected point. The projection of the selected point onto the surface of the three-dimensional object is determined according to the ordinate of the projection of the selected point, the intersection of the surface of the three-dimensional object with the plane of projection and the projection curve (625, 825).

Le procédé et les dispositifs selon l'invention ont pour objet l'optimisation de la projection d'un motif bidimensionnel sur la surface d'un objet tridimensionnel. Après avoir défini une courbe d'origine sur le motif bidimensionnel et une courbe de projection (600, 800) sur la surface de l'objet tridimensionnel, un point du motif est sélectionné (610, 810). L'abscisse de la projection du point sélectionné est déterminée selon l'abscisse du point sélectionné et selon un premier ratio de projection (615, 815). De même, l'ordonnée de la projection du point sélectionné est déterminée selon l'ordonnée du point sélectionné et selon un second ratio de projection (620, 820). Un plan de projection est ensuite déterminé. Ce plan de projection comprend le point de la courbe de projection déterminé par l'abscisse de la projection du point sélectionné. La projection du point sélectionné sur la surface de l'objet tridimensionnel est déterminé selon l'ordonnée de la projection du point sélectionné, l'intersection de la surface de l'objet tridimensionnel avec le plan de projection et la courbe de projection (625, 825).

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