edge

It is called edge to line resulting from the crossing of two surfaces or planes. The edges are also the segments of a straight that mark the limit of the sides of a plane figure.

It is possible to associate the notion of edge to the concept of edge. If we focus on a polyhedron (a body with plane faces that contain a finite volume), the edges are those straight lines in which two faces intersect.

Delving a little deeper into the concept of polyhedron, It's about a Body three-dimensional 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 counterpart 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 topological similarities in the field of classical geometry that are related to the polyhedron, although none of them is three-dimensional: the vertex (also known simply as point) is its equal to zero dimensions —Although in everyday speech it is common to use this word as a synonym for «small circle», the vertex has no length, width or height—; the edge, which consists of one dimension; the polychorus, which in addition to the three dimensions of the polyhedron adds one, represented by cells.

In the field of Graphic Schema 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 of the edge in question.

The design of three-dimensional graphics uses many of these concepts in a natural and everyday way to create extremely complex models, which at first glance do not appear to be supported by shapes. geometric basic. During the meticulous 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.

3D modeling and animation programs have the option of allowing exclusive access to one of the elements just mentioned, and each offers a number 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 a face could alter the position two or three other vertices unnecessarily. If, on the other hand, we are designing a room and we want to modify its height, it is appropriate to take the face that represents the ceiling and translate it downwards, instead of moving each vertex or edge separately.

For the geography, the edges are the rock ridges they have some mountains. These ridges are generally created by glacial erosion and allow the separation of two valleys.

The idea edge also appears in the botany. In this case, the edge is the hair-like filament that some plants have, especially grasses. Barley is a species that has edges.

Finally, in colloquial language, we usually speak of an edge with reference to a point of view or one 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 issue from a different angle".