- GuiCommand: Name:TechDraw GeometricHatch MenuLocation:TechDraw → Apply Geometric Hatch to Face Workbenches:TechDraw SeeAlso:TechDraw Hatch, TechDraw Hatching
The 
TechDraw GeometricHatch tool fills a closed region in a View with a pattern based on an AutoDesk PAT hatching specification. Alternatively the 
TechDraw Hatch tool uses SVG based hatch patterns. See Hatching for details.
- Select a closed region in a View.
- There are several ways to invoke the tool:
- Press the
TechDraw GeometricHatch button. - Select the TechDraw → Apply Geometric Hatch to Face option from the menu.
- Press the
- The Apply Geometric Hatch to Face task panel opens.
- Optionally change the Pattern File, the Pattern Name, the Pattern Scale, the Line Weight and the Line Color.
- Press the OK button.
- Hatching objects are vulnerable to the "topological naming problem". See TechDraw LengthDimension for more information. It is recommended that hatching be one of the last steps in your drawing process.
A small set of sample patterns are available in:
$INSTALL_DIR/data/Mod/TechDraw/PAT/FCPAT.pat$INSTALL_DIR
is the directory where FreeCAD was installed, for example
/usr/share/freecad/data/Mod/TechDraw/PAT/FCPAT.pat-
Source: The View and Face to receive the hatch pattern.
-
File Pattern: The location of the PAT file to use.
-
Name Pattern: The name of the PAT specification within File Pattern.
-
Scale Pattern: The scale to be applied to the pattern (must be > 0.0).
-
Weight Pattern: The thickness of the pattern lines.
-
Color Pattern: The color for the pattern lines.
See also: Autogenerated API documentation and FreeCAD Scripting Basics.
The GeometricHatch tool can be used in macros and from the Python console by using the following functions:
hatch = FreeCAD.ActiveDocument.addObject('TechDraw::DrawGeomHatch','GeomHatch')
hatch.Source = (view1,["Face0"])
hatch.FilePattern = "path/to/myPATfile.pat"
hatch.NamePattern = "Diamond"
rc = page.addView(hatch)It is also possible to use TechDraw's geometric hatch engine to produce a compound object in the 3D space. One must take care that the base face lies on the XY plane, as the algorithm is not tailored yet for other cases:
import TechDraw
face = Part.makePlane(10,10)
patfile = "path/to/myPATfile.pat"
pattern = "Diamond"
scale = 10
hatch = TechDraw.makeGeomHatch(face, scale, pattern, patfile)
Part.show(hatch){{TechDraw Tools navi}}
documentation index > TechDraw > TechDraw GeometricHatch