IfcColourRgbList

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcColourRgbList			ADDED

Semantic definitions at the entity

Entity definition

The IfcColourRgbList defines an ordered collection of RGB colour values. Each colour value is a fixed list of three colour components (red, green, blue). The attribute ColourList is a two-dimensional list, where:

first dimension is an unbounded list representing each colour value;
second dimension is a fixed list of four list members, where [1] is the red component, [2] the green component, and [3] the blue component.

NOTE The IfcColourRgbList is introduced to provide a compact representation of an indexable representation of colours for tessellated items.

HISTORY New entity in IFC4.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
1	ColourList	IfcNormalisedRatioMeasure	L[1:?] L[3:3]	List of colours defined by the red, green, blue components. All values are provided as a ratio of 0.0 ≤ value ≤ 1.0. When using 8bit for each colour channel, a value of 0.0 equals 0, a value of 1.0 equals 255, and values between are interpolated.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcPresentationItem
IfcColourRgbList
1	ColourList	IfcNormalisedRatioMeasure	L[1:?] L[3:3]	List of colours defined by the red, green, blue components. All values are provided as a ratio of 0.0 ≤ value ≤ 1.0. When using 8bit for each colour channel, a value of 0.0 equals 0, a value of 1.0 equals 255, and values between are interpolated.	X

Formal representations

XML Specification

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

 <xs:complexType name="IfcColourRgbList">

  <xs:complexContent>

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

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

     <xs:simpleType>

      <xs:restriction>

       <xs:simpleType>

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

       </xs:simpleType>

       <xs:minLength value="3"/>

      </xs:restriction>

     </xs:simpleType>

    </xs:attribute>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcColourRgbList

 SUBTYPE OF (IfcPresentationItem);

  ColourList : LIST [1:?] OF LIST [3:3] OF IfcNormalisedRatioMeasure;

END_ENTITY;

 EXPRESS-G diagram

	Liste von RGB-Farbwerten
	Colour Rgb List
	Liste de couleur RGB