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− | {{IFC_Documentation}}
| + | In IFC, it is possible to describe an element has being an "aggregation" of sub elements. |
− | {{stub}}
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− | [[File:At2 Fixme.gif]] TODO
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− | * Aggregate meaning
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− | ** An IFC entity that does not have its own body geometry. Its components hold geometry and structure-related data.
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− | ** a whole formed by combining several separate elements
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− | In IFC, it is possible to describe how a particular element is made out of many sub elements of the same type. This description is called an "aggregation". | |
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− | Types of elements that represent objects, like walls and doors, can be aggregated, or collected.
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− | Examples:
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− | * Roofs
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− | ** Roofs can consist of many beams, insulation layers, fixings, and coverings.
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− | * Stairs
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− | ** Stairs may include multiple stair flights, some landings, and railings.
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− | [[File:At2_Tip.png]]Note that aggregations only apply to elements of the same type. You cannot mix element types. For example, you cannot say a space consists of furniture - as the space element is a different type of element to the furniture element.
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− | How to create aggregates in:
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− | * BlenderBIM [[File:At2 Fixme.gif]]
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− | * FreeCAD [[File:At2 Fixme.gif]]
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− | Further reading:
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− | * [https://community.osarch.org/discussion/comment/3657#Comment_3657 OSArch Community]
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− | * [https://standards.buildingsmart.org/IFC/RELEASE/IFC4/ADD2/HTML/schema/ifckernel/lexical/ifcrelaggregates.htm BuildingSmart Semantic definitions at the entity]
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− | * [https://www.youtube.com/watch?v=0csmFH1glik BIMvoice live: Dion Moult on how to group sub objects in IFC Jan.2021]
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| + | TODO |
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| [[Category:Industry Foundation Classes (IFC)]] | | [[Category:Industry Foundation Classes (IFC)]] |