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<languages/>
{{GuiCommand|Name=Draft PathArray|Workbenches=[[Draft Module|Draft]], [[Arch Module|Arch]]|MenuLocation=Draft → PathArray|SeeAlso=[[Draft Array|Draft Array]] }}

{{Docnav
|[[Draft_CircularArray|CircularArray]]
|[[Draft_PathLinkArray|PathLinkArray]]
|[[Draft_Workbench|Draft]]
|IconL=Draft_CircularArray.svg
|IconR=Draft_PathLinkArray.svg
|IconC=Workbench_Draft.svg
}}

{{GuiCommand
|Name=Draft PathArray
|MenuLocation=Modification → Array tools → Path array
|Workbenches=[[Draft_Workbench|Draft]], [[Arch_Workbench|Arch]]
|Version=0.14
|SeeAlso=[[Draft_OrthoArray|Draft OrthoArray]], [[Draft_PolarArray|Draft PolarArray]], [[Draft_CircularArray|Draft CircularArray]], [[Draft_PathLinkArray|Draft PathLinkArray]], [[Draft_PointArray|Draft PointArray]], [[Draft_PointLinkArray|Draft PointLinkArray]]
}}


==Description==
==Description==


The [[Image:Draft_PathArray.svg|24px]] '''Draft PathArray''' command creates a regular array from a selected object by placing copies along a path. Use the [[Draft_PathLinkArray|Draft PathLinkArray]] command to create a more efficient [[App_Link|Link]] array instead. Except for the type of array that is created, Link array or regular array, the [[Draft_PathLinkArray|Draft PathLinkArray]] command is identical to this command.
The PathArray tool places copies of a selected shape along a selected path. The path can be a Wire or one or more Edges. The shapes can optionally be aligned with the tangent of the path. If required, a translation Vector can be specified to shift the shapes so the centroid is on the path. If no objects are selected, you will be invited to select them.

Both commands can be used on 2D objects created with the [[Draft_Workbench|Draft Workbench]] or [[Sketcher_Workbench|Sketcher Workbench]], but also on many 3D objects such as those created with the [[Part_Workbench|Part Workbench]], [[PartDesign_Workbench|PartDesign Workbench]] or [[Arch_Workbench|Arch Workbench]].


[[Image:Draft_PathArray_Example.png|400px]]
[[Image:Draft_PathArray_Example.png|400px]]
{{Caption|Draft PathArray}}


==How to use==
==Usage==


# Select a shape object you wish to distribute.
# Select the object you wish to array.
# Add the path object to the selection. It is also possible to select edges instead. The edges must belong to the same object and they must be connected.
# Select a path object along which the shapes will be distributed. -or-
# There are several ways to invoke the command:
# Select some edges of a path object.
# Press the {{KEY|[[Image:Draft_PathArray.png|16px]] [[Draft PathArray]]}} button.
#* Press the {{Button|[[Image:Draft_PathArray.svg|16px]] [[Draft_PathArray|Draft PathArray]]}} button.
#* Select the {{MenuCommand|Modification → Array tools → [[Image:Draft_PathArray.svg|16px]] Path array}} option from the menu.
# The array is created.
# Optionally change the [[#Properties|properties]] of the array in the [[property_editor|Property editor]].


==Options==
==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 {{Value|x}}, {{Value|y}} and {{Value|z}} are set to {{Value|0}}. If the {{PropertyData|Align}} 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 {{PropertyData|Align Mode}} property of the array. Other array properties involved in the alignment include {{PropertyData|Tangent Vector}}, {{PropertyData|Force Vertical}} and {{PropertyData|Vertical Vector}}.
* The array starts with shape copies which are not aligned to the path, nor translated to a new position by default. You can then change the count, alignment and/or translation vector in the properties.

[[Image:Draft_PathArray_example2.png|600px]]
{{Caption|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 {{PropertyData|Align 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 [https://en.wikipedia.org/wiki/Cross_product 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 {{PropertyData|Align Mode}} {{Value|Original}} but includes the possibility to pre-rotate the source object by specifying a {{PropertyData|Tangent Vector}}.

===Force Vertical and Vertical Vector===

These properties are only available if {{PropertyData|Align Mode}} is {{Value|Original}} or {{Value|Tangent}}. If {{PropertyData|Force Vertical}} is set to {{TRUE}} the local coordinate system is calculated in a different manner. The {{PropertyData|Vertical 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.


==Properties==
==Properties==


See also: [[property_editor|Property editor]].
* {{PropertyData|Base}}: The shape object

* {{PropertyData|PathObj}}: The path object
A Draft PathArray object is derived from a [[Part_Feature|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:
* {{PropertyData|PathSubs}}: The subelements(edges) of path object to be used as the path

* {{PropertyData|Count}}: The number of time to copy the shape
===Data===
* {{PropertyData|Xlate}}: The translation vector

* {{PropertyData|Align}}: True to align the shapes to the path, False to leave shapes in their default orientation.
{{TitleProperty|Link}}

The properties in this group are only available for Link arrays. See [[Std_LinkMake#Properties|Std LinkMake]] for more information.

* {{PropertyData|Scale|Float}}
* {{PropertyData|Scale Vector|Vector|Hidden}}
* {{PropertyData|Scale List|VectorList}}
* {{PropertyData|Visibility List|BoolList|Hidden}}
* {{PropertyData|Placement List|PlacementList|Hidden}}
* {{PropertyData|Element List|LinkList|Hidden}}
* {{PropertyData|_ Link Touched|Bool|Hidden}}
* {{PropertyData|_ Child Cache|LinkList|Hidden}}
* {{PropertyData|Colored Elements|LinkSubHidden|Hidden}}
* {{PropertyData|Link Transform|Bool}}

{{TitleProperty|Alignment}}

* {{PropertyData|Align|Bool}}: specifies if the elements in the array are aligned along the path or not. If it is {{FALSE}} all other properties in this group, except {{PropertyData|Extra Translation}}, do not apply and are hidden.
* {{PropertyData|Align Mode|Enumeration}}: specifies the align mode, which can be {{Value|Original}}, {{Value|Frenet}} or {{Value|Tangent}}.
* {{PropertyData|Extra Translation|VectorDistance}}: specifies an additional displacement for each element along the path.
* {{PropertyData|Force Vertical|Bool}}: specifies whether to override the default normal direction with the value of {{PropertyData|Vertical Vector}}. Only used if {{PropertyData|Align Mode}} is {{Value|Original}} or {{Value|Tangent}}.
* {{PropertyData|Tangent Vector|Vector}}: specifies the alignment vector. Only used if {{PropertyData|Align Mode}} is {{Value|Tangent}}.
* {{PropertyData|Vertical Vector|Vector}}: specifies the override for the default normal direction. Only used if {{PropertyData|Vertical Vector}} is {{TRUE}}.

{{TitleProperty|Objects}}

* {{PropertyData|Base|LinkGlobal}}: specifies the object to duplicate in the array.
* {{PropertyData|Count|Integer}}: specifies the number of elements in the array.
* {{PropertyData|Expand Array|Bool}}: specifies whether to expand the array in the [[Tree_view|Tree view]] to enable the selection of its individual elements. Only available for Link arrays.
* {{PropertyData|Path Object|LinkGlobal}}: specifies the object to be used for the path. It must contain {{Value|Edges}} in its [[Part_TopoShape|Part TopoShape]].
* {{PropertyData|Path Subelements|LinkSubListGlobal}}: specifies a list of edges of the {{PropertyData|Path Object}}. If supplied only these edges are used for the path.

===View===

{{TitleProperty|Link}}

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

* {{PropertyView|Draw Style|Enumeration}}
* {{PropertyView|Line Width|FloatConstraint}}
* {{PropertyView|Override Material|Bool}}
* {{PropertyView|Point Size|FloatConstraint}}
* {{PropertyView|Selectable|Bool}}: this is an inherited property that appears in the Selection group for other arrays
* {{PropertyView|Shape Material|Material}}

{{TitleProperty|Base}}

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

* {{PropertyView|Child View Provider|PersistentObject|Hidden}}
* {{PropertyView|Material List|MaterialList|Hidden}}
* {{PropertyView|Override Color List|ColorList|Hidden}}
* {{PropertyView|Override Material List|BoolList|Hidden}}
* {{PropertyView|Proxy|PythonObject|Hidden}}: this is an inherited property.

{{TitleProperty|Display Options}}

The properties in this group are inherited properties. See [[Part_Feature#Properties|Part Feature]] for more information.

* {{PropertyView|Bounding Box|Bool}}: this property is not inherited by Link arrays.
* {{PropertyView|Display Mode|Enumeration}}: for Link arrays it can be {{value|Link}} or {{value|ChildView}}. For other arrays it can be: {{value|Flat Lines}}, {{value|Shaded}}, {{value|Wireframe}} or {{value|Points}}
* {{PropertyView|Show In Tree|Bool}}
* {{PropertyView|Visibility|Bool}}

{{TitleProperty|Draft}}

* {{PropertyView|Pattern|Enumeration}}: not used.
* {{PropertyView|Pattern Size|Float}}: not used.

{{TitleProperty|Object style}}

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


==Scripting==
==Scripting==


See also: [https://freecad.github.io/SourceDoc/ Autogenerated API documentation] and [[FreeCAD Scripting Basics|FreeCAD Scripting Basics]].
The PathArray tool can by used in [[macros]] and from the python console by using the following function:

To create a path array use the {{incode|make_path_array}} method ({{Version|0.19}}) of the Draft module. This method replaces the deprecated {{incode|makePathArray}} method.


{{Code|code=
{{Code|code=
path_array = make_path_array(base_object, path_object,
makePathArray(shapeobject,pathobject,count,[translationvector],[alignment],[listofpathsubelements])
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)
}}
}}
* Distribute count copies of a document shapeobject along a pathobject or subobjects of a pathobject. Optionally translates each copy by FreeCAD.Vector xlate direction and distance to adjust for difference in shape centre vs shape reference point. Optionally aligns baseobject to tangent/normal/binormal of path.


* {{incode|base_object}} is the object to be arrayed. It can also be the {{incode|Label}} (string) of an object in the current document.
Example:
* {{incode|path_object}} is the path object. It can also be the {{incode|Label}} (string) of an object in the current document.
* {{incode|count}} is the number of elements in the array.
* {{incode|extra}} is a vector that displaces each element.
* {{incode|subelements}} is a list of edges of {{incode|path_object}}, for example {{incode|["Edge1", "Edge2"]}}. If supplied only these edges are used for the path.
* If {{incode|align}} is {{incode|True}} the elements are aligned along the path depending on the value of {{incode|align_mode}}, which can be {{incode|"Original"}}, {{incode|"Frenet"}} or {{incode|"Tangent"}}.
* {{incode|tan_vector}} is a unit vector that defines the local tangent direction of the elements along the path. It is used when {{incode|align_mode}} is {{incode|"Tangent"}}.
* If {{incode|force_vertical}} is {{incode|True}} {{incode|vertical_vector}} is used for the local Z direction of the elements along the path. It is used when {{incode|align_mode}} is {{incode|"Original"}} or {{incode|"Tangent"}}.
* If {{incode|use_link}} is {{incode|True}} the created elements are [[App_Link|App Links]] instead of regular copies.
* {{incode|path_array}} is returned with the created array object.

Example:

{{Code|code=
{{Code|code=
import FreeCAD,Draft
import FreeCAD as App
import Draft
Draft.makePathArray(base,path,items,centretrans,orient,pathsubs)

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()
}}
}}


==Usage Notes==
* Align + Xlate: When Align is True, the Xlate vector is relative to the local (tangent/normal/binormal) coordinates. When Align is False, the Xlate vector is relative to the global (XYZ) coordinates.


{{Docnav
==Limitations==
|[[Draft_CircularArray|CircularArray]]
* This tool is not available before version 0.14
|[[Draft_PathLinkArray|PathLinkArray]]
* The PathSubs Property does not yet appear in the properties list.
|[[Draft_Workbench|Draft]]
|IconL=Draft_CircularArray.svg
|IconR=Draft_PathLinkArray.svg
|IconC=Workbench_Draft.svg
}}


{{Draft Tools navi{{#translation:}}}}
<languages/>
{{Userdocnavi{{#translation:}}}}

Revision as of 12:42, 9 August 2022

Draft PathArray

Menu location
Modification → Array tools → Path array
Workbenches
Draft, Arch
Default shortcut
None
Introduced in version
0.14
See also
Draft OrthoArray, Draft PolarArray, Draft CircularArray, Draft PathLinkArray, Draft PointArray, Draft PointLinkArray

Description

The Draft PathArray command creates a regular array from a selected object by placing copies along a path. Use the Draft PathLinkArray command to create a more efficient Link array instead. Except for the type of array that is created, Link array or regular array, the Draft PathLinkArray command is identical to this command.

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 Arch Workbench.

Draft PathArray

Usage

  1. Select the object you wish to array.
  2. Add the path object to the selection. It is also possible to select edges instead. The edges must belong to the same object and they must be connected.
  3. There are several ways to invoke the command:
    • Press the Draft PathArray button.
    • Select the Modification → Array tools → Path array option from the menu.
  4. The array is created.
  5. Optionally change the properties of the array in the Property editor.

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 DataAlign 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 DataAlign Mode property of the array. Other array properties involved in the alignment include DataTangent Vector, DataForce Vertical and DataVertical 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 DataAlign 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 DataAlign Mode Original but includes the possibility to pre-rotate the source object by specifying a DataTangent Vector.

Force Vertical and Vertical Vector

These properties are only available if DataAlign Mode is Original or Tangent. If DataForce Vertical is set to true the local coordinate system is calculated in a different manner. The DataVertical 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.

Properties

See also: Property editor.

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.

  • DataScale (Float)
  • Data (Hidden)Scale Vector (Vector)
  • DataScale List (VectorList)
  • Data (Hidden)Visibility List (BoolList)
  • Data (Hidden)Placement List (PlacementList)
  • Data (Hidden)Element List (LinkList)
  • Data (Hidden)_ Link Touched (Bool)
  • Data (Hidden)_ Child Cache (LinkList)
  • Data (Hidden)Colored Elements (LinkSubHidden)
  • DataLink Transform (Bool)

Alignment

  • DataAlign (Bool): specifies if the elements in the array are aligned along the path or not. If it is false all other properties in this group, except DataExtra Translation, do not apply and are hidden.
  • DataAlign Mode (Enumeration): specifies the align mode, which can be Original, Frenet or Tangent.
  • DataExtra Translation (VectorDistance): specifies an additional displacement for each element along the path.
  • DataForce Vertical (Bool): specifies whether to override the default normal direction with the value of DataVertical Vector. Only used if DataAlign Mode is Original or Tangent.
  • DataTangent Vector (Vector): specifies the alignment vector. Only used if DataAlign Mode is Tangent.
  • DataVertical Vector (Vector): specifies the override for the default normal direction. Only used if DataVertical Vector is true.

Objects

  • DataBase (LinkGlobal): specifies the object to duplicate in the array.
  • DataCount (Integer): specifies the number of elements in the array.
  • DataExpand 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.
  • DataPath Object (LinkGlobal): specifies the object to be used for the path. It must contain Edges in its Part TopoShape.
  • DataPath Subelements (LinkSubListGlobal): specifies a list of edges of the DataPath Object. If supplied only these edges are used for the path.

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.

  • ViewDraw Style (Enumeration)
  • ViewLine Width (FloatConstraint)
  • ViewOverride Material (Bool)
  • ViewPoint Size (FloatConstraint)
  • ViewSelectable (Bool): this is an inherited property that appears in the Selection group for other arrays
  • ViewShape 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.

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

Display Options

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

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

Draft

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

Object style

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

Scripting

See also: Autogenerated API documentation and FreeCAD Scripting Basics.

To create a path array use the make_path_array method (introduced in version 0.19) of the Draft module. This method replaces the deprecated makePathArray method.

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)
  • base_object is the object to be arrayed. It can also be the Label (string) of an object in the current document.
  • path_object is the path object. It can also be the Label (string) of an object in the current document.
  • count is the number of elements in the array.
  • extra is a vector that displaces each element.
  • subelements is a list of edges of path_object, for example ["Edge1", "Edge2"]. If supplied only these edges are used for the path.
  • If align is True the elements are aligned along the path depending on the value of align_mode, which can be "Original", "Frenet" or "Tangent".
  • tan_vector is a unit vector that defines the local tangent direction of the elements along the path. It is used when align_mode is "Tangent".
  • If force_vertical is True vertical_vector is used for the local Z direction of the elements along the path. It is used when align_mode is "Original" or "Tangent".
  • If use_link is True the created elements are App Links instead of regular copies.
  • path_array is returned with the created array object.

Example:

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()