The IfcIndexedPolygonalTextureMap provides the mapping of the 2-dimensional texture coordinates to a set of polygonal bounded faces onto which it is mapped. It is used for mapping the texture to faces of an IfcPolygonalFaceSet. Such faces may have inner loops.
The TexCoords defined at supertype IfcIndexedTextureMap are a two-dimensional list of texture coordinates providing two parameter values for each indexed texture vertex. The set of TexCoordIndices provides the texture coordinates for the list of IfcIndexedPolygonalFace referred to via MappedTo.Faces. The texture coordinates at each IfcTextureCoordinateIndices correspond to the vertex points at the referenced IfcIndexedPolygonalFace. See also Figure 184.108.40.206.A for further explanation.
|1||Maps||LIST [1:?] OF IfcSurfaceTexture||
Reference 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.
Reference to the IfcTessellatedFaceSet to which it applies the texture map.
Indexable list of texture vertices.
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|4||TexCoordIndices||SET [1:?] OF IfcTextureCoordinateIndices||
Set of texture coordinate indices for polygonal faces with and without inner loops.
ENTITY IfcIndexedPolygonalTextureMap SUBTYPE OF (IfcIndexedTextureMap); TexCoordIndices : SET [1:?] OF IfcTextureCoordinateIndices; END_ENTITY;