View projection systems

Projections

Represents a three-dimensional object on a surface. Is the shadow of objects

Dihedral

The use of two projection planes reflects two views of a three-dimensional object.
three-dimensional object.

Pictorial projection

Projections that represent the object three-dimensionally, and show three
three of its faces.

Projection

Axonometric.

Represents objects by means of projection
projection on the three reference axes

Isometric projection.
Dimetric projection.
Trimetric projection.

Oblique

Two dimensions of the
object, are projected in true length
true length and the third dimension
third dimension with a
reduction coefficient, forming a 45° reduction angle.

Perspective

Represents objects as they are viewed by an observer.

Vanishing point, generates depth in the drawing.

The views of an object are the orthogonal projections of the object on six planes, in the form of a cube.

Representations of the object

According to the different directions from which it is observed.

The six possible views of an object

View C

Right side view

View E

Bottom view

View F

Back view

View D

Left side view

View B

Top view or floor

View A

Front or elevation view

It is the view that provides
more information

Two variants of orthogonal projection can be used.

Are the same, their arrangement in the drawing plane is reversed.

First dihedral projection method, European

The plane of projection is located at the observer and the object.

First there is the observer, the object
object and finally the projection plane.

Place a floating stone inside a trihedron and project its views onto the faces.

Types of orthogonal projection

Axonometric projection

Isometric projection

Trimetric projection

Dimetric projection

Bounded projection

Projection in multiple views

Orthographic projection

Projection in the seventh octant
projection in the first octant

Third dihedral projection method, American

The object is located on the observer and the projection plane.

The image is projected at the observer's position inside the cube. it is represented at an angle of 90°.

First there is the observer, then the projection plane and finally the object.