TechDraw: Vista di sezione

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Revision as of 22:25, 21 March 2020 by FuzzyBot (talk | contribs) (Updating to match new version of source page)

TechDraw SectionView

Menu location
TechDraw → Insert Section View
Workbenches
TechDraw
Default shortcut
None
Introduced in version
-
See also
Insert View, Insert Projection Group

Descrizione

The Section tool creates a cross section view based on an existing part view.

File:TechDraw Section example.png

Sectioning an already placed view, which shows the internal holes and a shaded cut surface

Usage

  1. Select a part view in the 3D window or tree.
  2. If you have multiple drawing pages in your document, you will also need to select the desired page in the tree.
  3. Press the Insert Section View button
  4. A dialog will open which will help calculate the various Section properties. The dialog calculates reasonable starting points for SectionNormal and view Direction, but these may be changed after creation for special needs.
  5. If you make a mistake, or change your mind while setting up the Section parameters, press the Reset button, and you can start over.

Taskview to define the sectional cut of a view

Properties

Data

Section

  • DatiBase View: The view on which this section is based.
  • DatiSection Normal: A vector describing the direction normal to the cutting plane.
  • DatiSection Origin: A vector describing a point on the cutting plane. Typically the centroid of the original part.
  • DatiFuse Before Cut: Fuse the source shapes before performing the section cut.

Cut Surface Format

  • DatiCut Surface Display: Appearance of cut surface. Options:
    • Hide Hides the cut surface, only the outline will be displayed.
    • Color: Colors the cut surface using the Cut Surface Color.
    • SvgHatch: Hatches the section cut using a hatch
    • PatHatch: Hatches the section cut using a geometric hatch
  • DatiFile Hatch Pattern: Full path to SVG hatch pattern file.
  • DatiFile Geom Pattern: Full path to PAT pattern file.
  • DatiSvg Included: Full path to the included SVG hatch pattern file.
  • DatiPat Included: Full path to the included PAT pattern file.
  • DatiName Geom Pattern: Name of PAT pattern to use (ignored for the SvgHatch setting of Cut Surface Display).

View

Cut Surface

  • VistaCut Surface Color: Solid color for surface highlight. Used if Cut Surface Display is set to Color.

Surface Hatch

  • VistaHatch Color: Color for surface hatch lines.
  • VistaWeight Pattern: Line weight for surface hatch lines.

Note: Section inherits all applicable View properties.

Scripting

See also: TechDraw API and FreeCAD Scripting Basics.

The New Section tool can be used in macros and from the Python console by using the following functions:

view = FreeCAD.ActiveDocument.addObject('TechDraw::DrawViewPart','View')
rc = page.addView(view)
view.Source = box
view.Direction = (0.0,0.0,1.0)

section = FreeCAD.ActiveDocument.addObject('TechDraw::DrawViewSection','Section')
rc = page.addView(section)
section.Source = box
section.BaseView = view
section.Direction = (0.0,1.0,0.0)
section.SectionNormal = (0.0,0.0,1.0)
section.SectionOrigin = (5.0,5.0,5.0)

Notes

  • Section Line Format: both the traditional section line format (as depicted above), and the "reference arrow method" are supported. This option is controlled by the Preference setting "Mod/TechDraw/Format/SectionFormat" (see Std_DlgParameter). 0 for traditional line, 1 for reference arrow method.
  • CutSurfaceDisplay: the cut surface can be hidden, painted in a solid color, hatched using an Svg pattern (default) or hatched using a PAT pattern. See Hatching.
  • FuseBeforeCut: the section operation sometimes fails to cut the source shapes. If FuseBeforeCut is true, the source shapes are merged into a single shape before the section operation is attempted. If you encounter problems with the section operation, try flipping this value.