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TechDraw GeometricHatch

Description

The GeometricHatch tool fills a closed region in a View with a pattern based on an AutoDesk PAT hatching specification. Alternatively, the Hatch tool uses an SVG or bitmap file as hatch pattern, see Hatching for details.

*Geometric hatch pattern on a face*

Usage

  1. Select an closed region in a View.
  2. Press the Apply Geometric Hatch to Face button
  3. A dialog will open where you can select your pattern, the scale, line weight and color.

Notes

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

Properties

  • 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.

Scripting

See also:

TechDraw API 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)

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documentation index > TechDraw > TechDraw GeometricHatch