celeritas::BackgroundInput Struct Reference

Extra metadata for the "background" volume. More...

#include <OrangeInput.hh>

Public Member Functions
	operator bool () const
	Whether the background metadata is used.

Public Attributes
VolumeId	label
LocalVolumeId	volume

Detailed Description

Extra metadata for the "background" volume.

Unlike a regular volume, the "background" represents a volume rather than a volume instance. Note that this can be an explicit volume (i.e., made of booleans) or implicit (i.e., have the lowest "Z order").

This is something of a hack: the background volume in a orangeinp::UnitProto is annotated by setting the label to VolumeInstanceId{} in g4org::ProtoConstructor; then converted from a proto to a UnitInput by the InputBuilder, and finally in g4org::Converter the empty volume instance IDs are replaced by (1) the world VolumeInstanceId for the top-level background volume, or (2) the VolumeId corresponding to the unit's label.

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The documentation for this struct was generated from the following file:

• OrangeInput.hh