**PRIN. OF DRAFTING AND SHOP DRAWINGS - OD1641 - LESSON 1/TASK 1**

confusion is a double-point projection.

This is clarified by the following axiom:

*The end view of a straight line is a point (really a double-point).*

Figure 11 is an example of a double-point projection.

The solution is derived

exactly as shown in figure 10 (on the previous page), except for step 3. Points 1

and 2 cannot be joined by an object line because the line extends into the paper

and, therefore, appears as a double point.

This may be visualized if you hold a

pencil horizontal to the ground and rotate it until you are looking directly at the

point, with the eraser end directly behind the point.

If the point represents

point 1 and the eraser represents point 2, you now have a model of the end view of

a line.

FIGURE 11.

END VIEW OF A LINE.

**11**