File Format FCStd: Difference between revisions

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==Overview== <!--T:35-->

<!--T:1-->
<!--T:1-->
The '''FreeCAD Standard file format''' ({{FileName|.FCStd}}) is FreeCAD's main file format. It is a compound format, supports compression and embedding of different kinds of data.
A FreeCAD project is actually a normal zip file that always contains a Document.xml file and optionally several data files, a GuiDocument.xml and a thumbnail in PNG format, PartShape3.brp Points3 . . .

== Internals of .FCStd files == <!--T:5-->

<!--T:14-->
FCStd is a [[#Contents | standard zip file containing one or more files]] in a [[#structure |specific structure]]. As such, it is possible to unpack a {{FileName|.FCStd}} file using a regular zip decompression tool, but care needs to be taken while packing the contents of a {{FileName|.FCStd}} file. FreeCAD contains a "Project Utility" to re-pack {{FileName|.FCStd}} files, it's use is described in [[#Change the source of the file .FCStd|Change the source of the file .FCStd]] below.

===Document.xml=== <!--T:15-->

<!--T:25-->
This is the main {{FileName|.xml}} file describing all the objects inside a FreeCAD document, that is, only the geometric and parametric definition of the objects, not their visual representation. If FreeCAD is ran in console mode (without the GUI), only this {{FileName|Document.xml}} will be used.

==== Example Document.xml==== <!--T:16-->


==Structure of Document.xml== <!--T:2-->
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{{Code|lang=xml|code=
<syntaxhighlight>
<?xml version='1.0' encoding='utf-8'?>
<?xml version='1.0' encoding='utf-8'?>
<!--
<!--
Line 97: Line 113:
</ObjectData>
</ObjectData>
</Document>
</Document>
}}
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==Change the source of the file .FCStd== <!--T:3-->
{{VeryImportantMessage|<br>'''ATTENTION ALWAYS WORK ON A COPY OF YOUR PROJECT !'''<br><br>}}


<!--T:4-->
===GuiDocument.xml=== <!--T:6-->
It is possible to change the source of a file .FCStd but the procedure is not without risk it is for this reason that we need to work on a '''copy'''.


<!--T:5-->
<!--T:26-->
This is the GUI counterpart of the {{FileName|Document.xml}} file. For each object described in the {{FileName|Document.xml}}, there is one corresponding object in {{FileName|GuiDocument.xml}}, describing the visual representation of that object (color, linewidth, etc).
After having made an '''copy''' of your project, follow these steps :


<!--T:6-->
===Thumbnails/thumbnail.png=== <!--T:7-->

Create a new directory and place your copy in that directory (there may be many files in your FCStd).
<!--T:27-->
This is a 128x128 pixels thumbnail image of the document, which is a screenshot of the 3D view at save time. Thumbnails are generated only if the corresponding option is enabled in the FreeCAD preferences.

===*.brep=== <!--T:9-->

<!--T:29-->
These are the [[wikipedia:Boundary representation|B-rep]] shapes of all objects that have a Part shape in the {{FileName|Document.xml}}. Each object, even if it is parametric, has its shape stored as an individual {{FileName|.brep}} file, so it can be accessed by components without the need to recalculate the shape.

===*.svg=== <!--T:8-->

<!--T:28-->
These are the template svg files used in [[TechDraw_Workbench|TechDraw]] pages.

===Typical structure=== <!--T:17-->

<!--T:30-->
Structure of a typical {{FileName|.FCStd}} file. The extension can be changed to {{FileName|.zip}} to explore it like a normal directory. The {{FileName|Document.xml}} and {{FileName|GuiDocument.xml}} are at the root of the archive, together with any number of {{FileName|.brp}} (BREP) files. One subdirectory may hold the thumbnail, and another the SVG templates used by [[TechDraw_Workbench|TechDraw]].


<!--T:7-->
* Go in '''Menu > tools > Project utility... Project utility'''
[[File:Project utility en.png|240px]]
* Source : Give your copy to unpack path.
* Destination : Give the path to the unzipped files.
* Click {{KEY|Extract}}
* Go to your directory and open both files '''GuiDocument.xml''' andt '''Document.xml''' using [http://notepad-plus-plus.org/ Notepad++] (Windows) (Notepad++ to modify a word in all open documents).
*'''GuiDocument.xml''' : contains all your project information to the interface, display in the Combo view, the configuration of FreeCAD . . .
**Example with '''Text004'''
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<!--DO NOT remove the <pre> </pre> tags. These are used to display the text exactly like this.-->
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<pre>
<ViewProvider name="Text004">
File.FCStd (File.zip)
<Properties Count="9">
|
<Property name="DisplayMode" type="App::PropertyEnumeration">
|--thumbnails/
<Integer value="1"/>
| |
</Property>
| :--Thumbnail.png
<Property name="FontName" type="App::PropertyString">
|
<String value="Arial"/>
:--Document.xml
</Property>
:--GuiDocument.xml
<Property name="FontSize" type="App::PropertyFloat">
:--Shape1.brp
<Float value="5.199999809265"/>
:--Shape2.brp
</Property>
:--MyPage.svg
<Property name="Justification" type="App::PropertyEnumeration">
:--etc.
<Integer value="0"/>
</pre>
</Property>
<Property name="LineSpacing" type="App::PropertyFloat">
<Float value="0.600000023842"/>
</Property>
<Property name="Rotation" type="App::PropertyAngle">
<Float value="0.000000000000"/>
</Property>
<Property name="RotationAxis" type="App::PropertyEnumeration">
<Integer value="2"/>
</Property>
<Property name="TextColor" type="App::PropertyColor">
<PropertyColor value="4294901760"/>
</Property>
<Property name="Visibility" type="App::PropertyBool">
<Bool value="true"/>
</Property>
</Properties>
</ViewProvider>
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<!--T:8-->
*'''Document.xml''' : contains all information relating to the constituent objects your project.
**Example with '''Text004'''
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<syntaxhighlight>
<Object type="App::Annotation" name="Text004" />
</syntaxhighlight>


== Embedding other files == <!--T:31-->


<!--T:32-->
<syntaxhighlight>
In order to embed other file types inside a FCStd file, you must first create a [[Scripted_objects|scripted object]] from the [[Python_console|Python console]], and give it an {{incode|App::PropertyFileIncluded}} property.
<Object name="Text004">

<Properties Count="3">
<!--T:33-->
<Property name="Label" type="App::PropertyString">
Then in the [[Property_editor|property editor]] you can go to the added property and choose a file in the computer. Once the FCStd file is saved, the file assigned to the {{PropertyData|PropertyFileIncluded}} property will be packed inside the {{incode|.FCStd}}. When the document is restored, the same file will be restored with the {{PropertyData|PropertyFileIncluded}} property.
<String value="Text004"/>
</Property>
<Property name="LabelText" type="App::PropertyStringList">
<StringList count="1">
<String value="135"/>
</StringList>
</Property>
<Property name="Position" type="App::PropertyVector">
<PropertyVector valueX="-30.000000000000" valueY="26.000000000000" valueZ="0.000000000000"/>
</Property>
</Properties>
</Object>


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<!--T:12-->
* Information such as :
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{{Code|code=
<syntaxhighlight>
custom_obj = App.ActiveDocument.addObject("App::FeaturePython", "CustomObject")
<VectorList file="Points1"/>
custom_obj.addProperty("App::PropertyFileIncluded", "AttachedFile")
<ColorList file="DiffuseColor"/>
}}
<Mesh file="MeshKernel.bms"/>
<Part file="PartShape.brp2"/>
. . . .
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<!--T:9-->
<!--T:34-->
* as well as other definitions containers '''file=''' relate has a file and if you change example "'''DiffuseColor'''" in '''<ColorList file="DiffuseColor"/>''' You must also change the name of the file for correspondence.
See the forum thread, [https://forum.freecadweb.org/viewtopic.php?t=38201 PDF inside the project].
* Once the Word change is identified, '''search''' (your Word) and '''Replace by''' (your new word) and click on {{KEY|Replace in all open documents}} and your change will be the same in both files '''GuiDocument.xml''' and '''Document.xml'''.

* When changes are complete, return to the tool '''Menu > Tools > Project utility... Create project'''
* Source : Give the path of the file that you just changed and that is to restore.
==Change the source of the file .FCStd== <!--T:3-->

* Destination : Give the path of the FCStd file to restore.
<!--T:4-->
* Click {{KEY|...}} In the new window click on {{KEY|Create a new folder}} (to avoid errors by rewriting the file) and you post. Click on {{KEY|Create}} you can check the "Load project file after creation".
* See [[Std_ProjectUtil|Std ProjectUtil]].
* If you have checked "Load project file after creation" your project will load in FreeCAD.
* '''PS :''' It is imperative that it have concordance GuiDocument.xml, Document.xml documents and files without which there will be errors in your .FCStd file. To do this should always work on a copy of your project.


==Other== <!--T:10-->
==Other== <!--T:10-->
More information on the format [[Fcstd_file_format|Fcstd]].


<!--T:11-->
<!--T:11-->
Here, a file Converter utility [[ImageConv|ImageConv]].
* A file Converter utility [[ImageConv|ImageConv]].



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[[Category:Command_Reference]]
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Revision as of 15:23, 28 August 2021

Overview

The FreeCAD Standard file format (.FCStd) is FreeCAD's main file format. It is a compound format, supports compression and embedding of different kinds of data.

Internals of .FCStd files

FCStd is a standard zip file containing one or more files in a specific structure. As such, it is possible to unpack a .FCStd file using a regular zip decompression tool, but care needs to be taken while packing the contents of a .FCStd file. FreeCAD contains a "Project Utility" to re-pack .FCStd files, it's use is described in Change the source of the file .FCStd below.

Document.xml

This is the main .xml file describing all the objects inside a FreeCAD document, that is, only the geometric and parametric definition of the objects, not their visual representation. If FreeCAD is ran in console mode (without the GUI), only this Document.xml will be used.

Example Document.xml

<?xml version='1.0' encoding='utf-8'?>
 <Document SchemaVersion="4">
    <Properties Count="9">
       <Property name="Comment" type="App::PropertyString">
          <String value=""/>
       </Property>
       <Property name="Company" type="App::PropertyString">
          <String value=""/>
       </Property>
       <Property name="CreatedBy" type="App::PropertyString">
          <String value=""/>
       </Property>
       <Property name="CreationDate" type="App::PropertyString">
          <String value="Fri Jan 29 15:14:38 2010 "/>
       </Property>
       <Property name="FileName" type="App::PropertyString">
          <String value="/tmp/test.FCStd"/>
       </Property>
       <Property name="Id" type="App::PropertyString">
          <String value="201b746f-a1ed-4297-bf3d-65d5ec11abe0"/>
       </Property>
       <Property name="Label" type="App::PropertyString">
          <String value="names"/>
       </Property>
       <Property name="LastModifiedBy" type="App::PropertyString">
          <String value=""/>
       </Property>
       <Property name="LastModifiedDate" type="App::PropertyString">
          <String value="Fri Jan 29 15:15:21 2010 "/>
       </Property>
    </Properties>
    <Objects Count="2">
       <Object type="Mesh::Cube" name="Cube" />
       <Object type="Part::Box" name="Box" />
    </Objects>
    <ObjectData Count="2">
       <Object name="Cube">
          <Properties Count="7">
             <Property name="Height" type="App::PropertyFloatConstraint">
                <Float value="10"/>
             </Property>
             <Property name="Label" type="App::PropertyString">
                <String value="Cube"/>
             </Property>
             <Property name="Length" type="App::PropertyFloatConstraint">
                <Float value="10"/>
             </Property>
             <Property name="Mesh" type="Mesh::PropertyMeshKernel">
                <Mesh file="MeshKernel.bms"/>
             </Property>
             <Property name="Placement" type="App::PropertyPlacement">
                <PropertyPlacement Px="0" Py="0" Pz="0" Q0="0" Q1="0" Q2="0" Q3="1"/>
             </Property>
             <Property name="Pos" type="App::PropertyPlacementLink">
                <Link value=""/>
             </Property>
             <Property name="Width" type="App::PropertyFloatConstraint">
                <Float value="10"/>
             </Property>
          </Properties>
       </Object>
       <Object name="Box">
          <Properties Count="7">
             <Property name="Height" type="App::PropertyLength">
                <Float value="10"/>
             </Property>
             <Property name="Label" type="App::PropertyString">
                <String value="Box2"/>
             </Property>
             <Property name="Length" type="App::PropertyLength">
                <Float value="10"/>
             </Property>
             <Property name="Placement" type="App::PropertyPlacement">
                <PropertyPlacement Px="0" Py="0" Pz="0" Q0="0" Q1="0" Q2="0" Q3="1"/>
             </Property>
             <Property name="Pos" type="App::PropertyPlacementLink">
                <Link value=""/>
             </Property>
             <Property name="Shape" type="Part::PropertyPartShape">
                <Part file="PartShape.brp2"/>
             </Property>
             <Property name="Width" type="App::PropertyLength">
                <Float value="10"/>
             </Property>
          </Properties>
       </Object>
    </ObjectData>
 </Document>

GuiDocument.xml

This is the GUI counterpart of the Document.xml file. For each object described in the Document.xml, there is one corresponding object in GuiDocument.xml, describing the visual representation of that object (color, linewidth, etc).

Thumbnails/thumbnail.png

This is a 128x128 pixels thumbnail image of the document, which is a screenshot of the 3D view at save time. Thumbnails are generated only if the corresponding option is enabled in the FreeCAD preferences.

*.brep

These are the B-rep shapes of all objects that have a Part shape in the Document.xml. Each object, even if it is parametric, has its shape stored as an individual .brep file, so it can be accessed by components without the need to recalculate the shape.

*.svg

These are the template svg files used in TechDraw pages.

Typical structure

Structure of a typical .FCStd file. The extension can be changed to .zip to explore it like a normal directory. The Document.xml and GuiDocument.xml are at the root of the archive, together with any number of .brp (BREP) files. One subdirectory may hold the thumbnail, and another the SVG templates used by TechDraw.

File.FCStd (File.zip)
  |
  |--thumbnails/
  |  |
  |  :--Thumbnail.png
  |
  :--Document.xml
  :--GuiDocument.xml
  :--Shape1.brp
  :--Shape2.brp
  :--MyPage.svg
  :--etc.

Embedding other files

In order to embed other file types inside a FCStd file, you must first create a scripted object from the Python console, and give it an App::PropertyFileIncluded property.

Then in the property editor you can go to the added property and choose a file in the computer. Once the FCStd file is saved, the file assigned to the DataPropertyFileIncluded property will be packed inside the .FCStd. When the document is restored, the same file will be restored with the DataPropertyFileIncluded property.

custom_obj = App.ActiveDocument.addObject("App::FeaturePython", "CustomObject")
custom_obj.addProperty("App::PropertyFileIncluded", "AttachedFile")

See the forum thread, PDF inside the project.

Change the source of the file .FCStd

Other