47 lines
5.3 KiB
HTML
47 lines
5.3 KiB
HTML
<html><head><title>Arch IFC/de</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><link type='text/css' href='wiki.css' rel='stylesheet'></head><body><h1>Arch IFC/de</h1></div>
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<p>Das <a href="Arch_Module.html" title="Arch Module">Arch Module</a> bietet einen Import für <a rel="nofollow" class="external text" href="https://de.wikipedia.org/wiki/Industry_Foundation_Classes">Industry Foundation Classes (IFC)</a>. Dieser immer stärker verbreitete offene Standard unterstützt den Austausch zwischen Anwendungen zur <a rel="nofollow" class="external text" href="https://de.wikipedia.org/wiki/Building_Information_Modeling">Gebäudedatenmodellierung</a>.
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<p>Der sich in Entwicklung befindende Import kann mit zwei unterschiedlichen Engines genutzt werden: Entweder mit Hilfe des mitgelieferten Python-Parsers, der zwar langsam ist, aber keine zusätzliche Software benötigt. Oder mit Hilfe der <a rel="nofollow" class="external text" href="http://ifcopenshell.org">IfcOpenShell</a>, die separat installiert werden muss. Nach korrekter Installation ist die IfcOpenShell standardmäßig gesetzt. Alternativ kann in den Einstellungen zu Arch auf den Python-Parser ausgewichen werden.
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<p>Aufgrund der höheren Geschwindigkeit und des Umfangs wird die IfcOpenShell für den Import empfohlen. IfcOpenShell unterstützt alle Ifc 2.3 Entities, die Geometrieinformationen enthalten. Diejenigen, die nicht zu <a href="Arch_Module.html" title="Arch Module">Arch</a> Objekten konvertiert werden können, werden als einfache <a href="Part_Module.html" title="Part Module">Teile</a> eingefügt. Der interne Parser unterstützt nur die folgenden Typen:
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<h2><span class="mw-headline" id="Import">Import</span></h2>
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<p>All <a rel="nofollow" class="external text" href="http://www.buildingsmart-tech.org/ifc/IFC4x1/html/schema/ifckernel/lexical/ifcproduct.htm">IfcProduct</a>-based entities from IFC2x3 or IFC4 files will be imported into the FreeCAD document. The IFC preferences settings allow you to set how the IFC objects are imported: as full parametric Arch objects, as non-parametric Arch objects, as non-parametric Part shapes, or as one Part shape per floor. Each of these types looses some information over the previous one, but is lighter on resources, which allows to open bigger files. A last type allows to discard entirely the importing of Arch objects, which is useful for structural analytic models.
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</p><p>If parametric Arch objects are used, for all IFC types that have an equivalent in the Arch Module, the corresponding type is used. For the others, a generic Part shape is created. All Arch objects, parametric and non-parametric, will carry the full set of <a rel="nofollow" class="external text" href="http://www.buildingsmart-tech.org/ifc/IFC4x1/html/schema/ifcpropertyresource/lexical/ifcproperty.htm">IfcProperties</a> attached to each object.
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</p><p><a rel="nofollow" class="external text" href="http://www.buildingsmart-tech.org/ifc/IFC4x1/html/schema/ifcproductextension/lexical/ifcannotation.htm">IfcAnnotation</a> objects are also imported, as well as linear and curve-based <a rel="nofollow" class="external text" href="http://www.buildingsmart-tech.org/ifc/IFC4x1/html/schema/ifcstructuralanalysisdomain/lexical/ifcstructuralitem.htm">IfcStructuralItem</a>-based entities.
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</p><p>Enabling the <b>show debug messages</b> in the IFC preferences settings will print a report indicating if any object from the IFC file failed to import.
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<h2><span class="mw-headline" id="Export">Export</span></h2>
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<p>Der Export von IFC-Dateien wird derzeit nur experimentell unterstützt und benötigt die <a rel="nofollow" class="external text" href="http://github.com/aothms/IfcOpenShell">Entwicklerversion</a> von IfcOpenShell. Nach Installation steht der experimentelle Export zur Verfügung.
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<p>IFC files are exported as IFC2x3 or IFC4 depending on your version of IfcOpenShell, which can be compiled with any of the IFC schemas.
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</p><p>If the shape of exported objects is based on an extrusion or a boolean operation, the operation and components will be correctly exported to IFC. If not, the object's shape is exported as <a rel="nofollow" class="external text" href="http://www.buildingsmart-tech.org/ifc/IFC4x1/html/schema/ifcgeometricmodelresource/lexical/ifcfacetedbrep.htm">IfcFacetedBrep</a>. If the shape contains curves, these will be faceted.
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<h2><span class="mw-headline" id="Links">Links</span></h2>
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<p>Tutorial <a href="https://www.freecadweb.org/wiki/index.php?title=Import/Export_IFC_-_compiling_IfcOpenShell" title="Import/Export IFC - compiling IfcOpenShell">Import/Export IFC - compiling IfcOpenShell</a>
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Online version: "<a dir="ltr" href="https://www.freecadweb.org/wiki/index.php?title=Arch_IFC/de&oldid=273109">http://www.freecadweb.org/wiki/index.php?title=Arch_IFC/de&oldid=273109</a>"</div>
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