IfcReflectanceMethodEnum

Semantic definitions at the type

Type definition

The IfcReflectanceMethodEnum defines the range of different reflectance methods available.

HISTORY New enumeration type in IFC2x2.

Enumeration definition

Constant	Description
BLINN	A reflectance model providing a smooth, slightly shiny appearance.
FLAT	A reflectance model providing a constant colour. This model ignores the effect of all light sources.
GLASS	A reflectance model that supports an approximation of glass-like materials that have both reflective and transmissive properties.
MATT	A reflectance model providing a dull matte appearance.
METAL	A reflectance model providing a specular metallic appearance.
MIRROR	A reflectance model that supports secondary mirrored views through ray tracing.
PHONG	A reflectance model conforming with the Phong model in which reflections are greatest in the `mirror' direction of a surface opposite the viewing direction with respect to the surface normal.
PHYSICAL	A reflectance model conforming with the Physical lighting model defined in X3D.
PLASTIC	A reflectance model providing a specular effect which is similar to the Phong model.
STRAUSS	A reflectance model for metallic and non-metallic appearance based on a limited set of control parameter.
NOTDEFINED

Formal representations

XML Specification

 <xs:simpleType name="IfcReflectanceMethodEnum">

  <xs:restriction base="xs:string">

   <xs:enumeration value="blinn"/>

   <xs:enumeration value="flat"/>

   <xs:enumeration value="glass"/>

   <xs:enumeration value="matt"/>

   <xs:enumeration value="metal"/>

   <xs:enumeration value="mirror"/>

   <xs:enumeration value="phong"/>

   <xs:enumeration value="physical"/>

   <xs:enumeration value="plastic"/>

   <xs:enumeration value="strauss"/>

   <xs:enumeration value="notdefined"/>

  </xs:restriction>

 </xs:simpleType>

EXPRESS Specification


TYPE IfcReflectanceMethodEnum = ENUMERATION OF (

 BLINN, 
 FLAT, 
 GLASS, 
 MATT, 
 METAL, 
 MIRROR, 
 PHONG, 
 PHYSICAL, 
 PLASTIC, 
 STRAUSS, 
 NOTDEFINED);
END_TYPE;


 EXPRESS-G diagram

	Reflectance Method Enum
	Enumération des méthodes de réflexion