Skip to content

Latest commit

 

History

History
155 lines (89 loc) · 6.8 KB

Draft_Shape2DView.md

File metadata and controls

155 lines (89 loc) · 6.8 KB
Raw
  • GuiCommand: Name: Draft Shape2DView MenuLocation: Modification -> Shape 2D view Workbenches: Draft_Workbench, Arch_Workbench SeeAlso: TechDraw_ProjectShape

Draft Shape2DView

Description

The Draft Shape2DView command creates 2D projections from selected objects, usually 3D solids or Arch SectionPlanes. The projections are placed in the 3D view.

Draft Shape2DView projections can be displayed on a TechDraw Workbench page using the TechDraw DraftView command. Alternatively the TechDraw Workbench offer its own projection commands. But these create projections that are only displayed on the drawing page and not in the 3D view.


Projection of solid shapes onto the XY plane

Usage

  1. Optionally rotate the 3D view. The camera direction in the 3D view determines the projection vector. For example, a top view will project onto the XY plane. The projection vector is ignore for projections created from Arch SectionPlanes.
  2. Optionally select one or more objects.
  3. There are several ways to invoke the command:
    • Press the Draft Shape2DView button.
    • Select the Modification → Shape 2D view option from the menu.
  4. If you have not yet selected an object: select an object in the 3D view.
  5. The projected objects are created on the XY plane.

How to produce plans and sections with different linewidths

Drawings with different linewidths for viewed and cut lines can easily be produced by using two shape2Dview objects from a same Arch SectionPlane. One of the shape2Dview objects has its projection mode set to Solid, which renders the viewed lines, and another set to Cut lines or Cut faces to render the cut lines. The two shape2Dviews are then placed at the same location, one on top of the other.

Properties

See also: Property editor.

A Draft Shape2DView object is derived from a Part Part2DObject and inherits all its properties. It also has the following additional properties:

Data

{{TitleProperty|Draft}}

  • Auto Update|Bool: specifies if the projection should be automatically recomputed if the Base object changes. Selecting {{False}} can be useful if there are many Draft Shape2DViews in a document or if they are complex. If set to {{False}} the Std Refresh command must be used to update the projection. (v0.20)

  • Base|Link: specifies the object to be projected.

  • Face Numbers|IntegerList: specifies the indices of the faces to be projected. Only works if Projection Mode is {{Value|Individual Faces}}.

  • Fuse Arch|Bool: specifies if Arch objects of the same type and material are fused or not.

  • Hidden Lines|Bool: specifies if hidden lines are shown or not.

  • In Place|Bool: only works if the selected object is an Arch SectionPlane, and Projection Mode is {{Value|Cutlines}} or {{Value|Cutfaces}}, specifies if the projection will appear co-planar with the section plane.

  • Projection|Vector: specifies the direction of the projection. Ignored if Base is an Arch SectionPlane.

  • Projection Mode|Enumeration: specifies the projection mode. The following modes are available:

-   
    {{Value|Solid}}
    
    : projects the entire selected object.

-   
    {{Value|Individual Faces}}
    
    : only projects the faces in the **Face Numbers** list.

-   
    {{Value|Cutlines}}
    
    : only works if the selected object is an [Arch SectionPlane](Arch_SectionPlane.md), projects only the edges cut by the section plane.

-   
    {{Value|Cutfaces}}
    
    : only works if the selected object is an [Arch SectionPlane](Arch_SectionPlane.md), projects the areas cut through solids by the section plane as faces.

-   
    {{Value|Solid faces}}
    
    : projects the entire selected object by cutting faces one by one. Can be used if the {{Value|Solid}} mode gives wrong results. <small>(v0.20)</small>

  • Segment Length|Float: specifies the size in millimeters of linear segments if Tessellation is True.

  • Tessellation|Bool: specifies if tessellation should be performed. Tessellation means that curves are replaced by sequences of line segments. This can be computationally intensive if the Segment Length is too short.

  • Visible Only|Bool: specifies if the projection should only be recomputed if it is visible.

  • Exclusion Points|Vector list: A list of exclusion points. Any edge passing through any of those points will not be drawn. (v0.20)

  • Exclusion Names|String list: A list of object names. Any viewed or cut child object with a name in that list will not be drawn. (v0.21)

View

{{TitleProperty|Draft}}

  • Pattern|Enumeration: not used.

  • Pattern Size|Float: not used.

Scripting

See also: Autogenerated API documentation and FreeCAD Scripting Basics.

To create a 2D projection use the make_shape2dview method ((v0.19) ) of the Draft module. This method replaces the deprecated makeShape2DView method.

shape2dview = make_shape2dview(baseobj, projectionVector=None, facenumbers=[])

  • baseobjis the object to be projected.

  • projectionVectoris the projection vector. If not supplied the Z axis is used.

  • facenumbersis a list of face numbers (0-based). If supplied only these faces are considered.

  • shape2dviewis returned with the created 2D projection.

Change the ProjectionMode property of the created object if required. It can be: "Solid", "Individual Faces", "Cutlines", "Cutfaces" or "Solid faces".

Example:

import FreeCAD as App
import Draft

doc = App.newDocument()

box = doc.addObject("Part::Box", "Box")
box.Length = 2300
box.Width = 500
box.Height = 1000

shape1 = Draft.make_shape2dview(box)

shape2 = Draft.make_shape2dview(box, App.Vector(1, -1, 1))

shape3 = Draft.make_shape2dview(box, App.Vector(-1, 1, 1), [0, 5])
shape3.ProjectionMode = "Individual Faces"

doc.recompute()

⏵ documentation index > Draft > Draft Shape2DView