|Расположение в меню|
|Черчение → 2D вид фигуры|
|Представлено в версии|
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
- 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.
- Optionally select one or more objects.
- There are several ways to invoke the command:
- If you have not yet selected an object: select an object in the 3D view.
- 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.
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:
- ДанныеAuto Update (
Bool): specifies if the projection should be automatically recomputed if the ДанныеBase object changes. Selecting
falsecan be useful if there are many Draft Shape2DViews in a document or if they are complex. If set to
falsethe Std Refresh command must be used to update the projection. introduced in version 0.20
- ДанныеBase (
Link): specifies the object to be projected.
- ДанныеFace Numbers (
IntegerList): specifies the indices of the faces to be projected. Only works if ДанныеProjection Mode is
- ДанныеFuse Arch (
Bool): specifies if Arch objects of the same type and material are fused or not.
- ДанныеHidden Lines (
Bool): specifies if hidden lines are shown or not.
- ДанныеIn Place (
Bool): only works if the selected object is an Arch SectionPlane, and ДанныеProjection Mode is
Cutfaces, specifies if the projection will appear co-planar with the section plane.
- ДанныеProjection (
Vector): specifies the direction of the projection. Ignored if ДанныеBase is an Arch SectionPlane.
- ДанныеProjection Mode (
Enumeration): specifies the projection mode. The following modes are available:
Solid: projects the entire selected object.
Individual Faces: only projects the faces in the ДанныеFace Numbers list.
Cutlines: only works if the selected object is an Arch SectionPlane, projects only the edges cut by the section plane.
Cutfaces: only works if the selected object is an Arch SectionPlane, projects the areas cut through solids by the section plane as faces.
Solid faces: projects the entire selected object by cutting faces one by one. Can be used if the
Solidmode gives wrong results. introduced in version 0.20
- ДанныеSegment Length (
Float): specifies the size in millimeters of linear segments if ДанныеTessellation is
- ДанныеTessellation (
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 ДанныеSegment Length is too short.
- ДанныеVisible Only (
Bool): specifies if the projection should only be recomputed if it is visible.
- ДанныеExclusion Points (
Vector list): A list of exclusion points. Any edge passing through any of those points will not be drawn. introduced in version 0.20
- ВидPattern (
Enumeration): not used.
- ВидPattern Size (
Float): not used.
To create a 2D projection use the
make_shape2dview method (introduced in version 0.19) of the Draft module. This method replaces the deprecated
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.
ProjectionMode property of the created object if required. It can be:
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()