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CircularArray

PathLinkArray

Draft

Descriere

Both commands can be used on 2D objects created with the Draft Workbench or Sketcher Workbench, but also on many 3D objects such as those created with the Part Workbench, PartDesign Workbench or BIM Workbench.

Draft PathArray

Alignment

The alignment of the elements in a Draft PathArray depends on the properties of the array and the orientation of the source object. The position of the source object is ignored: for the purpose of the array the x, y and z are set to 0. If the DateAlign property of the array is set to false the orientation of the array elements is identical to that of the source object. If it is set to true the X axis of the local coordinate system of each element placement is tangent to the path. The Y and Z axes of the local coordinate systems depend on the DateAlign Mode property of the array. Other array properties involved in the alignment include DateTangent Vector, DateForce Vertical and DateVertical Vector.

3 arrays based on the same non-planar path. From left to right: Align is false, Align is true with Align Mode Original and Align is true with Align Mode Frenet.

Align Mode

Three modes are available:

Original

This mode comes closest to the single DateAlign Mode available in version 0.18. It relies on a fixed normal vector. If the path is planar this vector is perpendicular to the plane of the path, else a default vector, the positive Z axis, is used. From this normal vector and the local tangent vector (the local X axis) a cross product is calculated. This new vector is used as the local Z axis. The orientation of the local Y axis is determined from the local X and Z axes.

Frenet

This mode uses the local normal vector derived from the path at each element placement. If this vector cannot be determined (for example in the case of a straight segment) a default vector, again the positive Z axis, is used instead. With this vector and the local tangent vector the local coordinate system is determined using the same procedure as in the previous paragraph.

Tangent

This mode is similar to DateAlign Mode Original but includes the possibility to pre-rotate the source object by specifying a DateTangent Vector.

Force Vertical and Vertical Vector

These properties are only available if DateAlign Mode is Original or Tangent. If DateForce Vertical is set to true the local coordinate system is calculated in a different manner. The DateVertical Vector is used as a fixed normal vector. From this normal vector and the local tangent vector (the local X axis) again a cross product is calculated. But now this vector is used as the local Y axis. The orientation of the local Z axis is determined from the local X and Y axes.

Using these properties can be required if one of the edged of the path is (almost) parallel to the default normal of the path.

Notes

• Fused Link arrays are not displayed properly, in the 3D View their elements always appear unfused.

Proprietăți

See also: Property View.

A Draft PathArray object is derived from a Part Feature object and inherits all its properties (with the exception of some View properties that are not inherited by Link arrays). The following properties are additional unless otherwise stated:

Data

Link

The properties in this group are only available for Link arrays. See Std LinkMake for more information.

• DateScale (Float)
• Date (Hidden)Scale Vector (Vector)
• DateScale List (VectorList)
• Date (Hidden)Visibility List (BoolList)
• Date (Hidden)Placement List (PlacementList)
• Date (Hidden)Element List (LinkList)
• Date (Hidden)_ Link Touched (Bool)
• Date (Hidden)_ Child Cache (LinkList)
• Date (Hidden)_ Link Owner (Integer)
• Date (Hidden)Colored Elements (LinkSubHidden)
• DateLink Copy On Change (Enumeration)
• DateLink Transform (Bool)

Alignment

Draft

• DateAlways Sync Placement (Bool)

Objects

• DateBase (LinkGlobal): specifies the object to duplicate in the array.
• DateExpand Array (Bool): specifies whether to expand the array in the Tree View to enable the selection of its individual elements. Only available for Link arrays.
• DateFuse (Bool): specifies if overlapping elements in the array are fused or not. introduced in 1.0
• DatePath Object (LinkGlobal): specifies the object to be used for the path. It must contain Edges in its Part TopoShape.
• DatePath Subelements (LinkSubListGlobal): specifies a list of edges of the DatePath Object. If supplied only these edges are used for the path.
• DatePlacement List (PlacementList): the placement for each element. Appears in the Link group for Link arrays. introduced in 1.1

Spacing

• DateCount (Integer): specifies the number of elements in the array.
• DateEnd Offset (Length): specifies the length from the end of the path to the last copy. Must be smaller than the length of the path minus the DateStart Offset. introduced in 0.21
• DateSpacing Mode (Enumeration): specifies how elements are spaced. The options are: introduced in 1.1
  • Fixed count: available path length (minus start and end offsets) is evenly divided to accommodate DateCount elements.
  • Fixed spacing: start at start offset and place new elements after traveling a fixed distance along the path.
  • Fixed count and spacing: same as Fixed spacing, but also stop at DateCount elements.
• DateSpacing Pattern (FloatList): the spacing is multiplied by a corresponding number in this sequence. Only used if DateUse Spacing Pattern is true, otherwise hidden. introduced in 1.1
• DateSpacing Unit (Length): the base fixed distance between elements. Only used if DateSpacing Mode is Fixed spacing or Fixed count and spacing, otherwise hidden. introduced in 1.1
• DateStart Offset (Length): specifies the length from the start of the path to the first copy. Must be smaller than the length of the path. introduced in 0.21
• DateUse Spacing Pattern (Bool): use repeating spacing patterns instead of uniform spacing. introduced in 1.1

View

Link

The properties in this group, with the exception of the inherited property, are only available for Link arrays. See Std LinkMake for more information.

• VizualizareDraw Style (Enumeration)
• VizualizareLine Width (FloatConstraint)
• VizualizareOverride Material (Bool)
• VizualizarePoint Size (FloatConstraint)
• VizualizareSelectable (Bool): this is an inherited property that appears in the Selection group for other arrays.
• VizualizareShape Material (Material)

Base

The properties in this group, with the exception of the inherited property, are only available for Link arrays. See Std LinkMake for more information.

• Vizualizare (Hidden)Child View Provider (PersistentObject)
• Vizualizare (Hidden)Material List (MaterialList)
• Vizualizare (Hidden)Override Color List (ColorList)
• Vizualizare (Hidden)Override Material List (BoolList)
• Vizualizare (Hidden)Proxy (PythonObject): this is an inherited property.

Display Options

The properties in this group are inherited properties. See Part Feature for more information.

• VizualizareBounding Box (Bool): this property is not inherited by Link arrays.
• VizualizareDisplay Mode (Enumeration): for Link arrays it can be Link or ChildView. For other arrays it can be: Flat Lines, Shaded, Wireframe or Points.
• VizualizareShow In Tree (Bool)
• VizualizareVisibility (Bool)

Draft

• VizualizarePattern (Enumeration): not used.
• VizualizarePattern Size (Float): not used.

Object style

The properties in this group are not inherited by Link arrays.

Scripting

path_array = make_path_array(base_object, path_object,
                             count=4, extra=App.Vector(0, 0, 0), subelements=None,
                             align=False, align_mode="Original", tan_vector=App.Vector(1, 0, 0),
                             force_vertical=False, vertical_vector=App.Vector(0, 0, 1),
                             use_link=True)

Exempluː

import FreeCAD as App
import Draft

doc = App.newDocument()

p1 = App.Vector(500, -1000, 0)
p2 = App.Vector(1500, 1000, 0)
p3 = App.Vector(3000, 500, 0)
p4 = App.Vector(4500, 100, 0)
spline = Draft.make_bspline([p1, p2, p3, p4])
obj = Draft.make_polygon(3, 500)

path_array = Draft.make_path_array(obj, spline, 6)
doc.recompute()

wire = Draft.make_wire([p1, -p2, -p3, -p4])
path_array2 = Draft.make_path_array(obj, wire, count=3, extra=App.Vector(0, -500, 0), subelements=["Edge2", "Edge3"], align=True, force_vertical=True)
doc.recompute()

CircularArray

PathLinkArray

Draft