It is called edge to the line resulting from the
intersection of two surfaces or planes. According to
DigoPaul,
edges are also the segments of
a line that mark the boundary of the sides of a flat figure.
It is possible to associate the notion of edge with the concept of edge. If
we focus on a polyhedron (a body with flat faces containing a
finite volume), the edges are those straight lines at which two faces intersect.
Delving a little deeper into the concept of polyhedron, it is
a threedimensional body belonging to classical geometry. In
its etymology we find components of the Greek language that refer to the
presence of "many faces." Although many people confuse the polyhedron with the
polygon, the latter is its topological similarity for two dimensions: it is also
created from vertices and edges, but it has only one face; in fact, a polyhedron
is a set of polygons.
In addition to the polygon, there are other similar topologies in the field
of classical geometry that are related to the polyhedron, although none of them
is threedimensional: the vertex (also known simply as a point) is its
similarity in zero dimensions —although in the everyday speech
is common use of this word as a synonym for "small circle", the vertex is not
long, wide or high; the edge, consisting of one dimension; the polycorus, which
in addition to the three dimensions of the polyhedron adds one, represented by cells.
In the field of graph theory, the edge arises from the link
between two vertices of the same graph. When two vertices are
connected through an artist, they are adjacent. In this framework, the vertices
are said to be incidents to the edge in question.
Threedimensional graphics design uses many of these concepts on a daily and
natural basis to create extremely complex models, which at first glance do not
seem to rely on basic geometric shapes. During the painstaking
work carried out by 3d artists, they manipulate the vertices, edges and faces of
their models thousands of times to achieve the results they seek at every step.
The 3d modeling and animation programs have the option of allowing exclusive
access to one of the elements just mentioned, and each one
offers a series of advantages that are suitable for different situations.
For example, when modeling a character's face, it is necessary to slightly
adjust the position of the vertices many times, from the beginning to the end of
the work; In this case, moving one face could alter the position of
two or three other vertices unnecessarily. If, on the other hand, we are
designing a room and want to modify its height, it is appropriate to take the
face that represents the ceiling and move it downwards, instead of moving each
vertex or edge separately.
For geography, the edges are the rock ridges that
some mountains have. In general, these edges are created by erosion generated by
glaciers and allow the separation of two valleys.
The idea of edge also appears in botany. In
this case, the edge is the hairlike filament that some plants
have, especially grasses. Barley is a species that has edges.
Finally, in colloquial language, edge is often referred to with reference to
a point of view or perspective. For example: "The
prosecutor decided to open a new edge and will now investigate the possible link
between the suspect and the victim's mother", "The judicial section is
just one edge of the problem: I am concerned about the political consequences of
this fact", "I would like to approach the subject from a different
angle".
