so i've reaserched a while and come with this broad definitions
a projection is the representation of a 3D object in 2D by the use of "imaginary proyectors"(cameras of some sort).
it has 2 branches,
-perspective proyections : they focus on "focal points" of the drawings, and the general rule that distant objets are smaller than closer objects.
-parallel proyections: they focus on showing the images by "beam lines" that are parallel each other.
Inside parallel proyections are 2 subdivisions
--orthographic: they represent the object by frontal images of the object
--axonometric: focus in distorting the angle of the axes for the figure representation. its broken in 2 kinds orthogonal and oblique
---orthogonal axonometry focus in the forshorthening of the angles of the drawing sistem, it subdivies in 3 parts
----isometric: it makes 3 angles equal (120 each)
----dimetric: it makes 2 angles equal
----trimetric: the 3 angles are different
---oblique axonometry focus also in the forshorthening of the angles, but with the limitant that one of them is always 90 degrees
so by this definition is it logical to conclude that oblique axonometry is a special form of the trimetric axonometry?
if any of this definition is wrong , or could be expressed better, please tell me, also biblographical references would also be appreciated. thanks!
(also sorry for if im not understood, english is my second language)