Parça Oluştur

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Menü konumu
None
Tezgahlar
Hepsi
Varsayılan kısayol
Hiçbiri
Versiyonda tanıtıldı
0.17
Ayrıca bkz
Grup Oluştur, Cisim Oluştur


Tanım

Parça , bir grup nesnenin, tek bir birim olarak beraber hareket ettirilebilen, bir çok nesneyi bir arada tutan genel amaçlı konteynerdir. Parça, en çok Parça tasarım gövdeleri, Parça tezgahı nesneleri, Kafes nesneleri, vb. gibi FreeCAD nesnelerini içerebilir.

Parça, eskizlerin ve diğer nesnelerin eklenebileceği yerel bir koordinat sistemi sağlar.

Although it is primarily intended for solid bodies, the Std Part can be used to manage any object that has a Placement property, so it can also contain Mesh Features, sketches, and other objects derived from the App GeoFeature class.

Parça, tüm tezgahlarda görüntülenen Yapı araç çubuğunda bulunur.

The Std Part.svg Std Part tool is not defined by a particular workbench, but by the base system, thus it is found in the structure toolbar that is available in all workbenches. To group objects arbitrarily without considering their position, use Std Group.svg Std Group; this object does not affect the placements of the elements that it contains, it is essentially just a folder that is used to keep the tree view organized.

Std Part-tree.pngStd Part example.png

Left: elements inside a Std Part in the tree view. Right: objects positioned in space, referred to the Origin of the Std Part.


Nasıl kullanılır

Araç çubuğundaki Std Part.png Parça düğmesine basın. Parça otomatik olarak aktif hale gelir.

  • Etkinleştirmek veya devre dışı bırakmak için Model ağacındaki Parçayı çift tıklayın.
  • Parçaya nesneler eklemek için, Model ağacındaki Parçaların üzerine sürükleyip bırakın.
  • Nesneleri bir Parçadan çıkarmak için, bunları Parçaların dışına ve Model ağacının üstündeki belge etiketine sürükleyip bırakın.

Notes

  • As of v0.19, a given object can only belong to a single Part.
  • Double-click the Part in the tree view or open the context menu (right-click) and select Toggle active part to activate or deactivate the Part. If another Part is active, it will be deactivated. See active status for more information.

Sınırlamalar

  • Bir Parça aktif olsa bile, yeni oluşturulan nesneler Parçaların içine değil, ağacın altına yerleştirilir. Basitçe Parçaların üzerine sürükleyip bırakın.
  • Bir Parçanın şekli yoktur. Bu nedenle, çoğu 3D işleminin, Parça Boole'ları gibi bir Parçaya uygulanması mümkün değildir.
  • Draft Snaps seçili Parça kaplarında ya da bir Parça kapsayıcısının içindeki nesnelerde çalışmaz.
  • "Editör'ün Notu: Şu anda, Parça aktif durumunun bir amaca hizmet edip etmediği açık değildir."

Özellikler

A Std Part is internally called App Part (App::Part class), and is derived from an App GeoFeature (App::GeoFeature class), therefore it shares most of the latter's properties.

In addition to the properties described in App GeoFeature, the App Part class has some properties that help it manage information in the context of an assembly, for example, DataType, DataId, DataLicense, DataLicenseURL, DataColor, and DataGroup.

These are the properties available in the property editor. Hidden properties can be shown by using the Show all command in the context menu of the property editor.

Data

Base

  • DataId: Parçanın ID'si (Parça numarası). Bu alan isteğe bağlıdır.
  • DataLicense: Parçanın yayınlandığı lisans.
  • DataLicense URL:Lisans terimlerinin bulunabileceği Web adresi.
  • DataPlacement:Parçaların 3D uzayda yönünü ve konumunu belirtir. Yerleşim bölümüne bakınız.
  • DataLabel: Etiket, yapılan işleme verilen addır. Bu ad, istediğiniz zaman değiştirilebilir.
  • DataGroup:Referans nesneleri listeler.

Hidden properties Data

  • DataMaterial (Map): map with material properties. By default, it is empty {}.
  • DataMeta (Map): map with additional meta information. By default, it is empty {}.
  • DataUid (UUID): the universally unique identifier (UUID) (128-bit number) of the object. This is assigned at creation time.
  • DataLabel2 (String): a longer, user editable description of this object, it is an arbitrary UTF8 string that may include newlines. By default, it is an empty string "".
  • DataExpression Engine (ExpressionEngine): a list of expressions. By default, it is empty [].
  • DataVisibility (Bool): whether to display the object or not.
  • DataOrigin (Link): the App Origin object that is the positional reference for all elements listed in DataGroup.
  • Data_ Group Touched (Bool): whether the group is touched or not.

View

The App Part only has the five properties of the basic App FeaturePython, and it does not have hidden properties.

Base

  • ViewDisplay Mode (Enumeration): Group.
  • ViewOn Top When Selected (Enumeration): Disabled (default), Enabled, Object, Element.
  • ViewSelection Style (Enumeration): Shape (default), BoundBox. If the option is Shape, the entire shape (vertices, edges, and faces) will be highlighted in the 3D view; if it is BoundBox only the bounding box will be highlighted.
  • ViewShow In Tree (Bool): if it is true, the object appears in the tree view. Otherwise, it is set as invisible.
  • ViewVisibility (Bool): if it is true, the object appears in the 3D view; otherwise it is invisible. By default this property can be toggled on and off by pressing the Space bar in the keyboard.

Örnek kullanımlar

  • Ayrı olarak imal edilecek nesneleri gruplayan ve ahşap bir masa gibi birbirine vidalanan bir montaj kabı olarak.
  • FreeCAD'de bir STEP düzeneğini içe aktarırken, ana düzenek ve alt düzenekleri Parça kaplarıdır.
  • Bir bilyalı yatak gibi çok kaynaşık olmayan bileşenlerden oluşan bir parça.

The Std Part is intended to be the basic building block to create assemblies. Unlike a PartDesign Body, an assembly is meant to be a collection of separate, distinguishable elements which are connected in some way in the physical world, for example, through pressure, screws, or glue.

Examples that could be Parts:

  • A wooden table that consists of individual wooden pieces (legs, top), which are put together by glue or metal screws.
  • A ball bearing that is composed of multiple steel balls, an inner ring, a retainer, a seal, and an outer ring.
  • An assembly of a screw with a washer, and a matching nut.

PartDesign Body contiguous separate.png PartDesign Body contiguous assembly.png

Left: three individual contiguous solids, each of them modelled by a PartDesign Body. Right: the individual Bodies put together inside a Std Part to create an assembly.


In general terms, when importing a STEP file into the program, the main assembly and its sub-assemblies will be imported as Part containers, each of them containing a simple Part Feature.

Detailed explanation

Aktif Durum

Bir FreeCAD belgesi birden fazla Parça içerebilir. Bir seferde sadece bir Parça aktif olabilir. Ağaç görünümünde açık mavi bir arka plan rengiyle etkin olan kısım görüntülenecektir.

An open document can contain multiple Parts. An active Part will be displayed in the tree view with the background color specified by the Active container value in the preferences editor (by default, light blue). An active part will also be shown in bold text.

To activate or de-activate a Part:

  • Double click on it on the tree view, or
  • Open the context menu (right click) and select Toggle active part.

Notes:

  • The active status of Parts was developed in v0.17 in parallel with the active status of PartDesign Bodies; however, as of v0.19 this status does not serve a real purpose for Parts.
  • Even when a Part is active, newly created objects are not placed inside of it automatically. In this case, simply drag these new objects, and drop them onto the desired Part.
  • Only a single Part can be active at a time.

Std Part active.png

Document with two Std Parts, of which the second one is active.


Orijin

Orijin, üç standart eksenden (X, Y, Z) ve üç standart düzlemden (XY, XZ ve YZ) oluşur. Eskizler bu düzlemlere eklenebilir. Parça içindeki tüm unsurlar Parça'nın orijini ile ilişkilendirilir; bu, Parçanın, içerisindeki öğelerin yerleşimini etkilemeden, küresel koordinat sistemine göre hareket ettirilebileceği ve döndürülebileceği anlamına gelir.

The Origin consists of the three standard axes (X, Y, Z) and three standard planes (XY, XZ and YZ). Sketches and other objects can be attached to these elements when creating them.

Part Origin tree.png Part Origin view.png

Left: Part Origin in the tree view. Right: representation of the Origin elements in the 3D view.


Note: the Origin is an App Origin object (App::Origin class), while the axes and planes are objects of type App::Line and App::Plane respectively. Each of these elements can be hidden and unhidden individually with the Space bar; this is useful to choose the correct reference when creating other objects.

Note 2: all elements inside the Part are referenced to the Part's Origin which means that the Part can be moved and rotated in reference to the global coordinate system without affecting the placement of the elements inside.

Görünürlük Yönetimi

Parçanın görünürlüğü, içerdiği herhangi bir nesnenin görünürlüğünün yerini alır. Parça gizlenirse, görünürlüğü true olarak ayarlanmış olsa bile içerdiği nesneler de gizlenir. Bir Parçanın içinde birden fazla nesne bir anda görülebilir.

The Part's visibility supersedes the visibility of any object it contains. If the Part is hidden, the objects it contains will be hidden as well, even if their individual ViewVisibility property is set to true. If the Part is visible, then each object's ViewVisibility determines whether the object is shown or not.

Part Visibility off.png Part Visibility on.png

The visibility of the Std Part determines whether the objects grouped under it are shown in the 3D view or not. Left: the Part is hidden, so none of the objects will be shown in the 3D view. Right: the Part is visible, so each object controls its own visibility.


Inheritance

A Std Part is formally an instance of the class App::Part, whose parent is the basic App GeoFeature (App::GeoFeature class), and is augmented with an Origin extension.

FreeCAD core objects.svg

Simplified diagram of the relationships between the core objects in the program. The App::Part class is a simple container that has a position in 3D space, and has an Origin to control the placement of the objects grouped under it.


Scripting

See also: FreeCAD Scripting Basics, and scripted objects.

See Part Feature for the general information on adding objects to the document.

A Std Part (App Part) is created with the addObject() method of the document. Once a Part exists, other objects can be added to it with the addObject() or addObjects() methods of this Part.

import FreeCAD as App

doc = App.newDocument()
obj = App.ActiveDocument.addObject("App::Part", "Part")

bod1 = App.ActiveDocument.addObject("PartDesign::Body", "Body")
bod2 = App.ActiveDocument.addObject("Part::Box", "Box")

obj.addObjects([bod1, bod2])
App.ActiveDocument.recompute()

A Part is a container for other objects, so it doesn't have its own Shape (Part TopoShape). However, in expressions or in the Spreadsheet Workbench, it is useful to get the compound shape of all objects contained inside the Part. This can be accomplished by using the _shape pseudo-property, which can then be used to extract other attributes.

=Part._shape.Edges[0].Length


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