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To
generate a grid on a withe sheet, somehow is
simple, simply to parallel bars and their
perpendiculars draw up and ready.
To develop a grid on a three-dimensional
surface, as for example in a shell (half a
sphere), it is a true problem, which is still
greater when the body is more complex.
These graticules have the appearance of being
based on quadrilaterals, but it is not thus.
The Mathemathics lodge a theorem that says
Any surface it is
triangulable, that is to say that a
quadrilateral assumption is not another thing
any more than two adjacent triangles and
whose succession produces the effect of a
squared tablecloth, as it has done in the
figures of this section.
It is evident that the parts of the triangle
that make contact with the surface of the
body, exclusively are his apexes. If it is
thus, then one will say that the triangle is
coplanar. Therefore, the
surface division is obtained by the
determination of the apexes of the squared
pattern that is generated on it.
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of images is allowed, as long as it mentions the
source and the
author.
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