Hatch Patterns are saved in .pat file
Where is it?
Hatch pattern files are saved in Options> File Locations> System > Support files search path.
Sample.pat file Custom Hatch pattern file can be found on C:\Program Files\Dassault Systemes\DraftSight\Default Files\Support
You can also add new path to your custom hatch patterns.
How to Create Custom Hatch pattern ?
We recommend to read to Custom line styles before continuing with Custom hatch pattern.
Edit sample.pat file with notepad and you will see dash dot line with 45 degrees angle.
*DASHDOT, Dash Dot Line 45 Degrees 45, 0,0 , 0,1, 0.5, -0.25,0,-0.25
First Line: Hatch pattern name , Description
Second Line: Angle(45), X, Y(origin) , X spacing , Y spacing, Line style values (0.5,-0.25,0,-0.25)
Same as second line you can write similar lines below it for different hatch patterns
Now lets create new Custom hatch pattern from scratch. You can either edit and type in above sample.pat file or create new Pat file and add file location to Options> File Locations> System > Support files search path
*CO_First, Dash Space Dash
0, 0,0, 0,1, 0.25,-0.25
Our hatch pattern will follow dash , space dash pattern with equal vertical Y spacing of 1″ . Dash length is 0.25 and space length is 0.25.
To demonstrate I have drawn Rectangle of 10″ x 10″ .As our Y spacing is 1″ so Hatch pattern is spread inside this rectangle .
Dash(0.25) and space(-0.25) pattern:
Now we will write second hatch pattern line which will cross this hatch pattern to 90 degree.
*CO_Second, Dash Space Dash 0, 0,0, 0,1, 0.25,-0.25 90, 0,0, 0,1, 0.25,-0.25
Copy above lines and paste in custom .pat file .
This is how it will look like.
hmm Wanna rotate it? But no need to change angle from .pat file just double click on above hatch pattern in DraftSight drawing and You will see Hatch /Fill dialog box. In Angle section change to 45 degree > Ok.
This is not standard hatch pattern but I want to show you how you can customize it and change as you want!