IfcTextureVertexList

Item	SPF	XML	Change	Description
IFC2x3 to IFC4 4.0.0.0
IfcTextureVertexList			ADDED

Semantic definitions at the entity

Entity definition

The IfcTextureVertexList defines an ordered collection of texture vertices. Each texture vertex is a two-dimensional vertex provided by a fixed list of two texture coordinates. The attribute TexCoordsList is a two-dimensional list, where

first dimension is an unbounded list representing each texture vertex;
second dimension is a fixed list of two list members, where [1] is the S-coordinate, and [2] the T-coordinate of the texture vertex.

NOTE The IfcTextureVertexList is introduced to provide a compact representation of an indexable representation of texture coordinates for texture maps in tessellated items.

HISTORY New entity in IFC4.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
1	TexCoordsList	IfcParameterValue	L[1:?] L[2:2]	List of texture vertices defined by S-coordinate and T-coordinate.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcPresentationItem
IfcTextureVertexList
1	TexCoordsList	IfcParameterValue	L[1:?] L[2:2]	List of texture vertices defined by S-coordinate and T-coordinate.	X

Formal representations

XML Specification

 <xs:element name="IfcTextureVertexList" type="ifc:IfcTextureVertexList" substitutionGroup="ifc:IfcPresentationItem" nillable="true"/>

 <xs:complexType name="IfcTextureVertexList">

  <xs:complexContent>

   <xs:extension base="ifc:IfcPresentationItem">

    <xs:attribute name="TexCoordsList" use="optional">

     <xs:simpleType>

      <xs:restriction>

       <xs:simpleType>

        <xs:list itemType="ifc:IfcParameterValue"/>

       </xs:simpleType>

       <xs:minLength value="2"/>

      </xs:restriction>

     </xs:simpleType>

    </xs:attribute>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcTextureVertexList

 SUBTYPE OF (IfcPresentationItem);

  TexCoordsList : LIST [1:?] OF LIST [2:2] OF IfcParameterValue;

END_ENTITY;

 EXPRESS-G diagram

	Textur - Vertexliste
	Texture Vertex List
	Liste des sommets de texture