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Ruled surface by two curves is formed by the movement of a segment in space along two guiding lines in such a way that the base vertex of the segment belongs to one guiding curve, and the ending vertex belongs to the other one. Guiding curves can be curves, edges, chains of edges, contours, and so on. It is possible to design a ruled surface where one of the guiding lines is a point. Examples of ruled surfaces by two curves are shown on the picture below. Guiding curves are highlighted using thick lines while the guiding point is shown using a circle.
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Ruled surfaces designed by two guides
a) curve guides, b) curve and point guides
See Also
