# Paraline drawing

# Isometric drawing.

#### Easy and accurate three dimensional drawing

Isometric drawing is a three dimensional drawing method that works with a group of three parallel lines set at 90 and 30 degrees to the horizontal.

It is a convenient drawing system because unlike perspective drawing, it enables the illustrator to calculate real measurements in any axis, including on receding planes.

Isometric drawing uses your 30/60 degree set square.

Isometric drawing is the three dimensional drawing method for **industrial design.**

# Quick menu

#### Isometric rendering

# What is isometric drawing

An isometric projection belongs in the group of drawing methods called '**axonimetric**' drawings. It is also called a '**paraline**' drawing because it uses three groups of parallel lines to construct it.

Isometric drawings are set at 30 degrees to the horizontal and use a 30/60 degree set square.

#### A convenient projection

Isometric drawing is a projection. This means that the planes of an object are projected onto three sloping planes. The best thing about Isometric drawing is that each plane is in the same angle relative to the 'picture plane'. What does that mean for us?

This means that because each view has the same amount of distortion (actually 'shear'), we can measure the length, width and height of things using real measurements. We can set up our drawing using the same measurements we used for a 3rd Angle Orthogonal drawing.

Being able to set out a drawing with real measurements is fantastic for students and designers, because when we want to test our ideas for product designs, to see how they would look if constructed, we can do it with certainty that the view is realistic.

#### Isometric drawing explained

# techniques for isometric

### ORTHOGONAL AND ISOMETRIC

#### DRAWING ACCURATELY

### SKETCHING ON AN ISOMETRIC GRID

### CRATING

#### Try this at home

### DRAWING ALL THE LINES

Consider the following drawing. The **crate** is shown in blue and the finished drawing is shown in red. When you are drawing your crate, make sure you **draw all the lines, even the ones at the back you think you won't need.** These *are needed* as you will need to measure from hidden points to calculate the position of features of the object.

#### Crate fully

# Circles in isometric

#### Adding Wheels

Circles appear as **ellipses** in isometric projections. An ellipse is a kind of oval. We have to draw them with the correct proportions between the long and short axis (length and width) and align them at the correct angle from the horizontal in our drawings.

#### Drawing ellipses in isometric

### Using an isometric template

As you move onto more complex drawings you will want to use an isometric ellipse template. These can be especially useful in tests. However, you must take care to learn how to align the small lines to the axes of the ellipse.

It might sound like a long way around, but you still need to draw the square to calculate axes before you apply the template.