Hatch patterns with dashed lines examples

Hatch patterns can contain dashed-lines by adding dash-lengths to a hatch pattern definition line.

Each dash-length specifies the length of a segment making up a line. If a length is positive, a pen-down segment is drawn. If a length is negative, the segment is pen-up and it is not drawn resulting in the creation of a space, also known as a gap. The pattern starts at the origin point with the first segment and cycles through the segments in circular fashion. A dash length of 0 draws a dot. You can specify up to six dash-lengths per definition line.

The standard hatch pattern ANSI33 looks like:

and is defined as follows:

*ANSI33, ANSI Bronze, Brass, Copper
45, .176776695,0, 0,.25, .125,-.0625

For example, to create a pattern that draws dashed lines at 45-degrees with a dash-length of 0.5 units and a gap after each dash of 0.5 units, the definition would look similar to

*DASH45, Dashed lines at 45 degrees
45, 0,0, 0,.5, .5,-.5

If you wanted to draw a 0.5-unit dash, a 0.25-unit gap, a dot, and a 0.25-unit gap before the next dash, the definition would look similar to

*DDOT45,Dash-dot-dash pattern: 45 degrees 
45, 0,0, 0,.5, .5,-.25, 0,-.25

Offset Lines in a Hatch Pattern Definition

Lines of a hatch pattern can be offset using the delta-x specification in a dashed-line family. The following example draws a family of lines separated by a gap of 0.5 units and a delta-x specification value of zero which results in each line lining up

0, 0,0, 0,.5, .5,-.5

An area hatched with this pattern would look like this:

The following example shows the previous hatch pattern definition with an offset along the X axis

0, 0,0, .5,.5, .5,-.5

The hatch pattern definition is similar, except the delta-x specification is set to 0.5. This offsets each successive family member by 0.5 in the direction of the line (in this case, parallel to the X axis). Because the lines are infinite, the dash pattern slides down the specified amount. An area hatched with this pattern would look like this: