IfcTextureMap
Definition
from IAI: An IfcTextureMap
provides the
mapping of the 2-dimensional texture coordinates to the surface onto
which it is mapped. It is used for mapping the texture to vertex based
geometry models, such as
- IfcFacetedBrep
- IfcFacetedBrepWithVoids
- IfcFaceBasedSurfaceModel
- IfcShellBasedSurfaceModel
The IfcTextureMap
provides a set of TextureMaps, each IfcVertexBasedTextureMap
holds a corresponding pair of lists:
- a list of TexturePoints,
currently of type IfcCartesianPoint,
and
- a list of TexturesVertices
of type IfcTextureVertex.
Each IfcTextureVertex (given as S, T coordinates of
2
dimension) corresponds to the geometric coordinates of the IfcCartesianPoint
(given as X, Y, and
Z coordinates of 3 dimensions).
HISTORY
New class
in IFC
Release 2x Edition 2.
IFC2x
Edition 3 CHANGE The IfcTextureMap
has changed by deleting the attribute Texture.
The attribute TextureMaps
has
been added.
Informal
propositions:
- All TexturePoints in the list TextureMaps
of IfcVertexBasedTextureMap
shall be used by the vertex
based geometry, to which this texture map is assigned to by using the IfcAnnotationSurface.Item
attribute.
EXPRESS specification:
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| WR11
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:
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SIZEOF([
'IFCGEOMETRICMODELRESOURCE.IFCSHELLBASEDSURFACEMODEL',
'IFCGEOMETRICMODELRESOURCE.IFCFACEBASEDSURFACEMODEL',
'IFCGEOMETRICMODELRESOURCE.IFCFACETEDBREP',
'IFCGEOMETRICMODELRESOURCE.IFCFACETEDBREPWITHVOIDS']
* TYPEOF(SELF\IfcTextureCoordinate.AnnotatedSurface[1].Item)
) >= 1;
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Attribute definitions:
| TextureMaps
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:
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Reference to a list of texture vertex assignment to coordinates within a vertex based geometry.
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Formal Propositions:
| WR11
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:
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The texture map shall only be defined for an IfcAnnotatedSurface, referening a vertex based surface or solid model.
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Inheritance graph