IfcTextureCoordinateGenerator

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcTextureCoordinateGenerator			MOVED	Schema changed from IFCPRESENTATIONDEFINITIONRESOURCE to IFCPRESENTATIONAPPEARANCERESOURCE.
Maps	X	X	MODIFIED	Name changed from Mode to Maps. Type changed from IfcLabel to IfcSurfaceTexture. Aggregation changed from NONE to LIST.
Mode	X	X	MODIFIED	Name changed from Parameter to Mode. Type changed from IfcSimpleValue to IfcLabel. Aggregation changed from LIST to NONE.
Parameter			ADDED

Semantic definitions at the entity

Entity definition

The IfcTextureCoordinateGenerator describes a procedurally defined mapping function with input parameter to map 2D texture coordinates to 3D geometry vertices. The allowable Mode values and input Parameter need to be agreed upon in view definitions and implementer agreements.

NOTE It is recommended to use the texture coordinate generation modes as defined in X3D.

NOTE Definition according to ISO/IEC 19775-1:

The TextureCoordinateGenerator supports the automatic generation of texture coordinates for geometric shapes.
The mode field describes the algorithm used to compute texture coordinates.

SPHERE,

CAMERASPACENORMAL,

CAMERASPACEPOSITION,

CAMERASPACEREFLECTIONVECTOR,

SPHERE-LOCAL,

COORD,

COORD-EYE,

NOISE,

NOISE-EYE,

SPHERE-REFLECT,

SPHERE-REFLECT-LOCAL

NOTE The definitions of texturing within this standard have been developed in dependence on the texture component of X3D. See ISO/IEC 19775-1.2:2008 X3D Architecture and base components Edition 2, Part 1, 18 Texturing component for the definitions in the international standard.

HISTORY New entity in IFC2x2.

IFC2x2 Add2 CHANGE The attribute Texture has been deleted.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
2	Mode	IfcLabel		The Mode attribute describes the algorithm used to compute texture coordinates. NOTE The applicable values for the Mode attribute are determined by view definitions or implementer agreements. It is recommended to use the modes described in ISO/IES 19775-1.2:2008 X3D Architecture and base components Edition 2, Part 1. See 18.4.8 TextureCoordinateGenerator for recommended values.	X
3	Parameter	IfcReal	? L[1:?]	The parameters used as arguments by the function as specified by Mode. IFC4 CHANGE : Data type restricted to REAL.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcPresentationItem
IfcTextureCoordinate
1	Maps	IfcSurfaceTexture	L[1:?]	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.	X
IfcTextureCoordinateGenerator
2	Mode	IfcLabel		The Mode attribute describes the algorithm used to compute texture coordinates. NOTE The applicable values for the Mode attribute are determined by view definitions or implementer agreements. It is recommended to use the modes described in ISO/IES 19775-1.2:2008 X3D Architecture and base components Edition 2, Part 1. See 18.4.8 TextureCoordinateGenerator for recommended values.	X
3	Parameter	IfcReal	? L[1:?]	The parameters used as arguments by the function as specified by Mode. IFC4 CHANGE : Data type restricted to REAL.	X

Formal representations

XML Specification

 <xs:element name="IfcTextureCoordinateGenerator" type="ifc:IfcTextureCoordinateGenerator" substitutionGroup="ifc:IfcTextureCoordinate" nillable="true"/>

 <xs:complexType name="IfcTextureCoordinateGenerator">

  <xs:complexContent>

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

    <xs:attribute name="Mode" type="ifc:IfcLabel" use="optional"/>

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

     <xs:simpleType>

      <xs:restriction>

       <xs:simpleType>

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

       </xs:simpleType>

      </xs:restriction>

     </xs:simpleType>

    </xs:attribute>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcTextureCoordinateGenerator

 SUBTYPE OF (IfcTextureCoordinate);

  Mode : IfcLabel;

  Parameter : OPTIONAL LIST [1:?] OF IfcReal;

END_ENTITY;

 EXPRESS-G diagram

	Texturkoordinaten - Generator
	Texture Coordinate Generator
	G茅n茅rateur de coordonn茅es de texture