FREE Lesson 2 - Axonometrics And Parallel Projection
Introduction To Technical Drawing
Technical drawing boils down to two-dimensional technical drawing (triple projection) and three-dimensional technical drawing (axonometric).
Triple Projections meansdescribing a 3D volume using a frontal, top and side view which are linked by means of a basic Ox,Oy,Oz coordinate system.
Axonometric describes a 3D volume using a 3D representation.
The difference between an axonometric and a perspective is that the lines which are parallel in real life, stay parallel in an axonometric, while the lines which are parallel in perspective converge to the same perspective point.
Also, axonometric can have a scale, which implies the drawing is proportionally smaller than the original, real-life object by a certain standardisedpercentage(100 times smaller, 50 times, 200, 20,etc.).
Examples Of Technical Drawing
Technical drawing (both triple projection and axonometric) can be combined with freehand drawing to create interesting artistic pieces.
Facades (frontal views of buildings) benefit from a higher amount of detailing in order to communicate as much information as possible - information such as materiality, the way light falls on the facade, construction details, colours, human scale, etc.
Axonometric of rooms need as much detailing as possible, to better represent the mood of the interior spaces and to move the drawing as quickly as possible from ‘a couple of construction line boxes’ to an interior space.
Keep in mind though, all these examples are still technical drawings.
They need to first be correct to respect the drawing’s scale and all the parallel edges to really be parallel... and then to be artistically expressive.
Floating Cube
The first exercise for technical drawing is a triple projection and axonometric of a simple cube, then of a cube floating 1 cm from the ground.
The top view for a simple and floating are the same, the only difference is with the frontal and side views.
The isometric axonometric is the standard type of axo you will be using 99% of times in architectural drawing.
It implies a 120-degree angle between the three axes and the same unit of measure for Ox, Oy and Oz.
