الرســـــم الهندســــــــــــــى " اعدادى هندســـــــــــة"

Oblique
projection is a method of drawing objects in 3 dimensions. It is quite a
simple technique compared to isometric or even perspective drawing.
However, to draw accurately in oblique projection traditional drawing
equipment is needed (see diagram below).
The
technique for drawing a cube in oblique projection is outlined below,
stage by stage. To draw it correctly in oblique projection three main
rules must be followed:
1. Draw the front or side view of the object.
2. All measurements drawn backwards are half the original measurement.
3. 45 degrees is the angle for all lines drawn backwards

A. Draw the front view. Remember to use a T-square and 45 degree set square.

B.
Draw 45 degree lines from each corner of the square. The distance of
any lines drawn back at 45 degrees should be halved. For example, a cube
may have sides of 100mm but they must be drawn 50mm in length. This
should mean that the cube will look more realistic and in proportion.


C.
Draw 45 degree lines from each corner of the square. The distance of
any lines drawn back at 45 degrees should be halved. For example, a cube
may have sides of 100mm but they must be drawn 50mm in length. This
should mean that the cube will look more realistic and in
proportion.

Sample answer - Camera in oblique projection.

1. Draw the basic shape of the camera starting with basic cube.

2. Add detail such as the flash and eye piece.

3. Next draw the button

5. Add thickness to the lens and the camera is complete. Colour and shade can be added to enhance the final presentation.