What are the 3 types of drawing techniques?

Draw a quick example of each and explain it?

Isometric DrawingPerspective drawingThird Angle Orthographic

drawing

Isometric drawing is way of presenting designs/drawings in three dimensions. In order for a design to appear three dimensional, a 30 degree angle is applied to its sides. The cube opposite, has been drawn in isometric projection.

Then work away

from the line,

drawing lines up

at 30 degrees.

Connect the top two

edges by working at 30

degrees again. They

should meet exactly.

This drawing shows the shape

in more detail than the oblique

projection.

Put the two

side lines in,

making sure

they are

vertical.

Begin by drawing the

centre edge of your

shape. Draw it

vertically up the page.

Remember the spider rule and apply thick and thin lines around each shape to make them look even more 3D

Add holes to your shapes and apply thick and thin line rule

Decide where the light source would be and shade the blocks in 3 tones:

• Light tone• Mid tone • Dark tone

The mobile phone / music player opposite, has been sketched in free hand isometric projection. It allows the designer to draw in 3D quickly and with a reasonable degree of accuracy. The design is still drawn at a 30 degree angle, although this is estimated, rather than drawn with graphics equipment.

ISOMETRIC GRID PAPER

EXPLODED ISOMETERIC PROJECTION

Designers use ‘exploded’ views, often drawn in isometric projection, to show parts of productsthat are hidden from sight. For example, look at the following examples to see how this works

With exploded isometric projection, all the parts are in line with each other, along a centre line.This is drawn precisely through the centre of the product being drawn.

With a normal isometric drawing, all the parts are in their assembled positions. This means thatvital hidden detail cannot be seen.

Designers also use exploded views to explain their designs to clients/customersand manufacturers. Furthermore, exploded views of products are often suppliedto customers, who in turn assemble the product. A good example of this is 'knockdown' furniture. When the flat pack is opened, an instruction sheet or bookletexplains how the furniture is assembled, often in the form of isometric explodedviews.

The drawings seen below, were supplied with an instruction booklet. They aretwo of numerous diagrams drawn in isometric projection. They help explain howthe cabinet and all its component parts are assembled, to form the finished

product.

These are accurate drawings constructed by a designer, that explain how theproduct he/she has designed is assembled.

What is exploded isometric drawing? Where might I see these drawings Why are they useful? How can I use these skills?

Perspective drawing is a good style to use when drawing in 3D. There are different styles including single point and two point perspective. The basic example shows how to construct a simple single point perspective drawing of a cube. Using the same skills more complex drawings/designs can be drawn, after a little practice

Perspective is a realistic way of drawing objects in 3D. We have already looked at single point perspective, two point perspective using two vanishing points and when an object is drawn in this way it is even more realistic than if it were to be drawn with a single vanishing point.

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Perspective Drawing (2 point) uses a Horizon and Vanishing Points.

VP1 VP2

Orthographic drawing is a way of drawing a three dimensional object. Normally the object is drawn as three separate, related views - Front View, Side View and Plan View

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3rd Angle Orthographic Drawing uses PLAN, FRONTand SIDE views

The 3rd Angle symbol

PLAN

FRONT SIDE

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1:1 your drawing is the same size as the original item.

1:2 your drawing is HALF the size of the original item.

1:4 your drawing is a QUARTER the size of the original item.