IFC 4.3.x development

8.12.3.39 IfcTextureCoordinate

Change log

IFC4

additionsattributesMaps
deletionsinverses AnnotatedSurface

8.12.3.39.1 Semantic definitions at the entity

The IfcTextureCoordinate is an abstract supertype of the different kinds to apply texture coordinates to geometries. For vertex based geometries an explicit assignment of 2D texture vertices to the 3D geometry points is supported by the subtype IfcTextureMap, in addition there can be a procedural description of how texture coordinates shall be applied to geometric items. If no IfcTextureCoordinate is provided for the IfcSurfaceTexture, the default mapping shall be used.

NOTE  See relevant subtypes of IfcGeometricRepresentationItem for default texture mapping description.

NOTE  The definitions of texturing has been adapted from X3D Architecture and base components, section 18 Texturing component as defined in ISO/IEC 19775-1.2

HISTORY  New entity in IFC2x2.

IFC2x3 CHANGE  The attribute Texture is deleted.

IFC4 CHANGE  The inverse attribute AnnotatedSurface isdeleted, and the attribute Maps is added.

8.12.3.39.1 Attributes

#Attribute Type Description
IfcPresentationItem
IfcTextureCoordinate
1Maps LIST [1:?] OF IfcSurfaceTextureReference to the one (or many in case of multi textures with identity transformation to geometric surfaces) subtype(s) of IfcSurfaceTexture that are mapped to a geometric surface by the texture coordinate transformation.

8.12.3.39.2 Entity inheritance

dot_inheritance IfcIndexedTextureMap IfcIndexedTextureMap IfcTextureCoordinate IfcTextureCoordinate IfcIndexedTextureMap->IfcTextureCoordinate IfcPresentationItem IfcPresentationItem IfcTextureCoordinate->IfcPresentationItem IfcTextureCoordinateGenerator IfcTextureCoordinateGenerator IfcTextureCoordinateGenerator->IfcTextureCoordinate IfcTextureMap IfcTextureMap IfcTextureMap->IfcTextureCoordinate IfcPresentationItem_children 16 more... IfcPresentationItem_children->IfcPresentationItem

8.12.3.39.3 Formal representations

ENTITY IfcTextureCoordinate
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcIndexedTextureMap
	,IfcTextureCoordinateGenerator
	,IfcTextureMap))
 SUBTYPE OF (IfcPresentationItem);
	Maps : LIST [1:?] OF IfcSurfaceTexture;
END_ENTITY;