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  • #CV-2x3-126 — Welcome to buildingSMART-Tech.org
    be supported Description For the implementation of text within the IFC2x3 extended coordination view the following agreements and limitations are made the supported text is available as model text vector based test and drafting text true text fonts only the drafting text is exported the IfcTextStyle is supported with TextFontStyle being IfcTextStyleFontModel using Name FontFamily and FontSize drafting height and TextCharacterAppearance being IfcTextStyleForDefinedFont using Colour the length measures used within the IfcTextStyle are all given as drafting values 1 1 on paper In addition to the style the text is placed within the model by IfcTextLiteral and subtype IfcTextLiteralWithExtend The following agreements are made IfcTextLiteral is supported for single line text IfcTextLiteralWithExtent is supported for single and multi line text the attributes Placement Literal and Extent are supported Path is always assumed to be LEFT the BoxAlignment may be supported to be determined yet Addition 14 05 2007 any text in IFC2x3 coordination view is a model text i e the text style refers to model units Previous CV 2x3 125 Next CV 2x3 127 Implementation get involved first steps and tools IFC2x3 impl guidance IFC Impl Agreements CV 2x3 126 IFC Impl Guide IFC Header Guide IFC4 impl guidance

    Original URL path: http://www.buildingsmart-tech.org/implementation/ifc-implementation/ifc-impl-agreements/cv-2x3-126 (2016-02-11)
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  • #CV-2x3-127 — Welcome to buildingSMART-Tech.org
    on the limited subset of surface style entities and attributes to be supported number CV 06 127 based on IFC2x3 effects extended coordination view date 05 May 2006 initiator ISG meeting Munich summary agreements on the limited subset of surface style entities and attributes to be supported Description For the implementation of surface styles within the IFC2x3 extended coordination view the following agreements and limitations are made The IfcSurfaceStyle is supported agreement about Side still be be made The Styles shall be of type IfcSurfaceStyleShading and subtype IfcSurfaceStyleRendering only IfcSurfaceStyleLighting IfcSurfaceStyleRefraction IfcSurfaceStyleWithTextures and IfcExternallyDefinedSurfaceStyle are not supported For IfcSurfaceStyleShading the SurfaceColour is supported for IfcSurfaceStyleRendering also DiffuseColour and Transparency Other surface colour components may be exported but are not required for import Previous CV 2x3 126 Next CV 2x3 128 Implementation get involved first steps and tools IFC2x3 impl guidance IFC Impl Agreements CV 2x3 127 IFC Impl Guide IFC Header Guide IFC4 impl guidance Implementer s community accompanying documents frequently asked questions Implementations Search Advanced Search IFC Dev Blog IFC Dev Blog More Registration This site contains content which is only available to registered users To get access to the content you must be a registered user Please log

    Original URL path: http://www.buildingsmart-tech.org/implementation/ifc-implementation/ifc-impl-agreements/cv-2x3-127 (2016-02-11)
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  • #CV-2x3-128 — Welcome to buildingSMART-Tech.org
    Dijon summary agreement on how to use material layer set and usage for wall types Description For the implementation of IfcStandardWall with an associated IfcWallType within the IFC2x3 extended coordination view the following agreements are made the IfcWallType is supported but is not mandatory for export if an IfcWallType is exported for a standard wall then the following specification on assigning material information to both the IfcWallStandardCase and the IfcWallType needs to be met for each IfcWallStandardCase an IfcMaterialLayerSetUsage is assigned general rule according to the IFC specification all wall occurrences being of type IfcWallStandardCase and belonging to one wall type are assigned to one instance of IfcWallType the IfcMaterialLayerSetUsage s attached to all instances of IfcWallStandardCase belonging to the same IfcWallType shall reference the same instance of IfcMaterialLayerSet this instance of IfcMaterialLayerSet is assigned to the IfcWallType The following figure shows the correct assignment of IfcMaterialLayerSetUsage and IfcMaterialLayerSet to IfcWallStandardCase and IfcWallType Previous CV 2x3 127 Next CV 2x3 129 Implementation get involved first steps and tools IFC2x3 impl guidance IFC Impl Agreements CV 2x3 128 IFC Impl Guide IFC Header Guide IFC4 impl guidance Implementer s community accompanying documents frequently asked questions Implementations Search Advanced Search IFC Dev

    Original URL path: http://www.buildingsmart-tech.org/implementation/ifc-implementation/ifc-impl-agreements/cv-2x3-128 (2016-02-11)
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  • #CV-2x3-129 — Welcome to buildingSMART-Tech.org
    no longer be used The assignment to the presentation layer i e the CAD layer is handled by IfcPresentationLayerAssignment or its subtype IfcPresentationLayerWithStyle Each shape representation of an IfcProduct can be assigned individually to an CAD Layer PS with the pre 2x3 Pset Draughting only the whole product could be assigned In addition each individual IfcRepresentationItem within a set of IfcRepresentation Items can have its layer assignment The following agreement is made first check whether the IfcShapeRepresentation LayerAssignments points to an IfcPresentationLayerAssignment holding the CAD layer information second check whether for an individual IfcGeometricRepresentationItem within the Items of the IfcShapeRepresentation an layer assignment override exists If yes assign it to the different layer future sensible restriction should be made on the potential overriding of the IfcShapeRepresentation LayerAssignments by individual IfcGeometricRepresentationItem LayerAssignment In addition the implementer agreement is made that each individual IfcShapeRepresentation or IfcGeometricRepresentationItem shall only have zero or one LayerAssignments Layer with style In addition to the IfcPresentationLayerAssignment the subtype IfcPresentationLayerWithStyle has to be supported for import and the style information has to be acknowledged The following entities are supported for IfcPresentationLayerWithStyle LayerStyles IfcCurveStyle Previous CV 2x3 128 Next CV 2x3 130 Implementation get involved first steps and tools

    Original URL path: http://www.buildingsmart-tech.org/implementation/ifc-implementation/ifc-impl-agreements/cv-2x3-129 (2016-02-11)
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  • #CV-2x3-130 — Welcome to buildingSMART-Tech.org
    it shall no longer be used The assignment of color to the shape representation here to the curve style associated to curves being part of the shape representation is handled by IfcCurveStyle CurveColour It can be assigned to the element having a shape representation via explicitly directly attached to geometry subtype of IfcGeometricRepresentationItem inverse relationship StyledByItem pointing to IfcStyledItem Styles IfcPresentationStyleAssignment being an IfcCurveStyle explicitly indirectly attached to presentation layer subtype of IfcGeometricRepresentationItem inverse relationship LayerAssignments or IfcShapeRepresentation inverse relationship LayerAssignments pointing to the subtype IfcPresentationLayerWithStyle see also CV 2x3 129 The IfcPresentationLayerWithStyle LayerStyles points to the IfcCurveStyle implicitly attached to the material information used for parametric definition of element shape IfcMaterial HasRepresentation IfcMaterialDefinitionRepresentation with the attribute Representations refering to IfcStyledRepresentation Items being IfcStyledItem s Then IfcStyledItem Styles IfcPresentationStyleAssignment being an IfcCurveStyle All three ways of assigning a line color are supported for import in the IFC2x3 coordination view The sequence for overriding is check for the layer color if available override it if available by the material color override if if available by the explicit geometric item color Previous CV 2x3 129 Next CV 2x3 131 Implementation get involved first steps and tools IFC2x3 impl guidance IFC Impl Agreements

    Original URL path: http://www.buildingsmart-tech.org/implementation/ifc-implementation/ifc-impl-agreements/cv-2x3-130 (2016-02-11)
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  • #CV-2x3-131 — Welcome to buildingSMART-Tech.org
    associated to surfaces surface models and solid models being part of the shape representation is handled by IfcSurfaceStyle Styles pointing to IfcSurfaceStyleShading or subtype IfcSurfaceStyleRendering NOTE other entities are not allowed for IfcSurfaceStyle Styles see also CV 06 27 It can be assigned to the element having a shape representation via explicitly directly attached to geometry subtype of IfcGeometricRepresentationItem inverse relationship StyledByItem pointing to IfcStyledItem Styles IfcPresentationStyleAssignment being an IfcSurfaceStyle NOTE assigning an IfcSurfaceStyle to a presentation layer is not supported if the curve color is provided by IfcPresentationLayerWithStyle LayerStyles it can be used as the edge color for wire frame and in absent of any other surface color information also as surface color implicitly attached to the material information used for parametric definition of element shape IfcMaterial HasRepresentation IfcMaterialDefinitionRepresentation with the attribute Representations refering to IfcStyledRepresentation Items being IfcStyledItem s Then IfcStyledItem Styles IfcPresentationStyleAssignment being an IfcSurfaceStyle Both ways of assigning a surface color are supported for import in the IFC2x3 coordination view The sequence for overriding is check for the layer curve color if available override it if available by the material surface color override it if available by the explicit geometric item surface color Previous CV 2x3

    Original URL path: http://www.buildingsmart-tech.org/implementation/ifc-implementation/ifc-impl-agreements/cv-2x3-131 (2016-02-11)
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  • #CV-2x3-132 — Welcome to buildingSMART-Tech.org
    has to be acknowledged that existing applications have various restrictions on what are legal characters and what is the maximum string length for certain names e g for a layer name for an object property name for a material name etc These restrictions are very different and cannot be unified Therefore the following was agreed There are no restrictions on export beside not using LF FF and other characters in a single string Special characters like white space various special characters 5 etc are allowed for export On import each receiving application is required to parse the name string prior to assigning it While parsing not allowed characters have to be replaces by an underscore Additional effort have to be made to avoid that two distinct names become equal by e g truncating it to the maximal length NOTE It should be recommended to deal with this issue in BIM modeling guidelines to avoid using such names This is however outside of this agreement and the certification requirement Previous CV 2x3 131 Next CV 2x3 133 Implementation get involved first steps and tools IFC2x3 impl guidance IFC Impl Agreements CV 2x3 132 IFC Impl Guide IFC Header Guide IFC4 impl

    Original URL path: http://www.buildingsmart-tech.org/implementation/ifc-implementation/ifc-impl-agreements/cv-2x3-132 (2016-02-11)
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  • #CV-2x3-133 — Welcome to buildingSMART-Tech.org
    view date 24 Nov 2006 initiator ISG meeting in Dijon summary Restrict the insertion point of doors and windows in regard to the opening Description Doors an windows inserted into an opening should follow an agreement about positioning The proposal is Doors and windows shall have a local placement the local placement shall be relative to the opening into which they are inserted Doors and window should be located inside the first quadrant of the local placement with the insertion point of the door aor window at the origin The insertion point of the door andwindow is defined to be the lower left bottom corner of the door and window panel The following figures show correct placements of doors inside a wall Fig 1 insertion of doors inside the wall Fig 2 insertion of doors inside walls Fig 3 insertion of doors inside walls Previous CV 2x3 132 Next CV 2x3 134 Implementation get involved first steps and tools IFC2x3 impl guidance IFC Impl Agreements CV 2x3 133 IFC Impl Guide IFC Header Guide IFC4 impl guidance Implementer s community accompanying documents frequently asked questions Implementations Search Advanced Search IFC Dev Blog IFC Dev Blog More Registration This site contains

    Original URL path: http://www.buildingsmart-tech.org/implementation/ifc-implementation/ifc-impl-agreements/cv-2x3-133 (2016-02-11)
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