The
construction of the majority of the objects around us (houses, motorcycles,
televisions, telephones, computers, etc.) requires that these objects to be previously
defined (design process) and subsequently represented with exact precision on
plans (objective description of the form).
We can represent objects by the representation systems. Representation systems are graphic languages to link elements in 3D to elements in 2D and vice versa. They are a very important part of descriptive geometry.
These languages are universal. They can be understood all over the world
Representation systems are based on the projections of the geometrical three-dimensional elements on plans. The projections vary according to the representation system.
We can project the objects in different ways:
• ORTHOGONAL PROJECTION
• OBLIQUE PROJECTIONS
• CONIC PROJECTIONS
( IN GREEK, ORTHO= 90 Degrees, GONAL= angle)
We can represent objects by the representation systems. Representation systems are graphic languages to link elements in 3D to elements in 2D and vice versa. They are a very important part of descriptive geometry.
These languages are universal. They can be understood all over the world
Representation systems are based on the projections of the geometrical three-dimensional elements on plans. The projections vary according to the representation system.
We can project the objects in different ways:
• ORTHOGONAL PROJECTION
• OBLIQUE PROJECTIONS
• CONIC PROJECTIONS
( IN GREEK, ORTHO= 90 Degrees, GONAL= angle)
CLASSIFICATION OF THE REPRESENTATION SYSTEMS
Diedric System:
Isometric Perspective
This system is composed of three planes
forming a trihedral, which is projected, forming the same
angle, onto the drawing plane. This gives us the isometric perspective. 
Conic Perspective
Conic perspective is a method that gives us the sensation of distance and depth in a flat support. It is an optical illusion.
•
First rule:
–
When
we look at a group of parallel lines that escape and we want to draw them, we
do not draw them parallel, but instead we draw them meeting at one point.
–
We
call this point the vanishing point.
Basic Elements in linear
perspective
•
Point
of view : It is the observer’s eye.
•
Horizon
line: The height of this line coincides with the height of the point of view.
•
Ground
line: It is a theoretical line that help us to draw the figures. The distance
between the horizon line and the ground line is the height of the observer.
•
Vanishing
point: It is always on the horizon line.
•
Distance
points: They are the vanishing points of the lines that form 45º with the
representation plane
One point perspective
Two points perspective (Dos puntos de fuga)
NEXT PROJECT:
Design the classroom with one point perspective. Some examples:
