Chapter 13 Creating Solutions
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of the box. This line should match the line
at the top of the right side of the box. The
final line should connect the end of the line
that was just drawn to the upper corner of
the right side of the box. This creates the
top of the box. In a cube, all the lines drawn
are the exact same size.
Cylinders
The cylinder is drawn using a square at
the axes. See Figure 13-16. To begin the
cylinder, designers use the angled lines of
the axes and draw a square. They then draw
an ellipse. An ellipse is an isometric circle.
This circle is drawn through the midpoint
of each line of the square. This forms the
bottom of the cylinder. To make the top of
the cylinder, designers draw vertical lines
from the corners of the square. They then
create a square positioned at the top of the
cylinder. The designers draw an ellipse in
the top square. To finish the cylinder, they
draw a horizontal line from one corner of
the bottom square to the other corner. Two
vertical lines are then drawn where the line
crosses the ellipse. These create the sides
of the cylinder.
Spheres
Spheres are drawn by first creating
a cube. See Figure 13-17. The cube is
created as described previously. Once the
cube is drawn, a circle is created inside
of it. The circle is drawn so it touches the
midpoint of the outside lines of the cube.
When the sphere is drawn, it looks similar
to a plain circle. In order for the sphere to
look three-dimensional, it must be shaded.
Shading is discussed later in this chapter.
Cones and Pyramids
The cone and pyramid are drawn using
the rectangular box. The box is drawn
Step 1
Step 2
Step 3
Step 4
Isometric axes
Figure 13-15. Boxes are sketched using these
four steps.
Step 1
Step 2
Step 3
Step 4
Step 5
Figure 13-16. Cylinders are sketched using
these five steps.