IfcSpecularHighlightSelect

BACnet MVD

#### IfcSpecularHighlightSelect

Natural language names

| Specular Highlight Select
| Sélection de réflexion spéculaire

##### Semantic definitions at the type

Type definition

The IfcSpecularHighlightSelect defines the selectable types of value for specular highlight sharpness.

> NOTE The two select types relate to the different ways to specifiy the sharpness (or shininess) of the specular part of the reflectance equation. For each surface side style only one of the two methods is needed for calculating the specular part of the equation.

> HISTORY New select type in IFC2x2.

Select definition

Type | Description
--- | ---
IfcSpecularExponent |
IfcSpecularRoughness |

##### Formal representations

XML Specification
`<xs:group name="IfcSpecularHighlightSelect">
<xs:choice>
<xs:element ref="ifc:IfcSpecularExponent-wrapper"/>
<xs:element ref="ifc:IfcSpecularRoughness-wrapper"/>
</xs:choice>
</xs:group>
`
EXPRESS Specification
`TYPE IfcSpecularHighlightSelect = SELECT (
IfcSpecularExponent,
IfcSpecularRoughness);
END_TYPE;

EXPRESS-G diagram

`

References: IfcSurfaceStyleRendering

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