Class Ifc4::IfcMaterialUsageDefinition

Nested Relationships

This class is a nested type of Struct Ifc4.

Inheritance Relationships

Base Type

Derived Types

Class Documentation

class Ifc4::IfcMaterialUsageDefinition : public IfcUtil::IfcBaseEntity

IfcMaterialUsageDefinition is a general supertype for all material related information items in IFC that have occurrence specific assignment parameters to assign a set of materials with shape parameters to a reference geometry item of that component. There are two ways of assigning a set of materials with shape parameters:

a layer set to a reference curve - assigning a material layer set with material layers having a sequence and thickness parameter to a reference curve of an element - represented by the ‘Axis’ shape representation of that element a profile set to a cardinal point - assigning a material profile set with assigned profile geometry and insertion points to a reference curve by an offset, called “cardinal point” - the reference curve is represented by the ‘Axis’ shape representation of that element

Each instantiable subtype of IfcMaterialUsageDefinition has to be assigned to a subtype of IfcElement by using the objectified relationship IfcRelAssociatesMaterial; it is only valid in conjunction with an element occurrence.

HISTORY New entity in IFC2x4

Informal proposition

It is illegal to assign a subtype of IfcMaterialUsageDefinition to a subtype of IfcElementType, it shall only be assigned to an element occurrence.

Subclassed by Ifc4::IfcMaterialLayerSetUsage, Ifc4::IfcMaterialProfileSetUsage

Public Functions

IfcTemplatedEntityList<IfcRelAssociatesMaterial>::ptr AssociatedTo() const
const IfcParse::entity &declaration() const
IfcMaterialUsageDefinition(IfcEntityInstanceData *e)

Public Static Functions

const IfcParse::entity &Class()