#### GEOMETRY_COMPOSITE

###### Geometries
*GEOMETRY_COMPOSITE
"Optional title"
gid
gid${}_1$, ..., gid${}_8$
##### Parameter definition
VariableDescription
gid Geometry identification number
gid${}_1$, ..., gid${}_8$ Up to 8 sub-geometry ID's
##### Description

This command is used to combine up to eight sub-geometries into one composite geometry. A negative ID means that the region represented by the sub-geometry will be removed from the composite geometry.

##### Example
###### Composite geometry filled with soil

A composite geometry is defined by combining a GEOMETRY_PIPE with a GEOMETRY_BOX. The box is referenced with a negative ID and it cuts a hole in the cylinder defined by the pipe.

*UNIT_SYSTEM
SI
*PARTICLE_DOMAIN
0, 0, 1.0e6
0, 0, 0, 1, 1, 1
*PARTICLE_SOIL
1
DRY, 100
*GEOMETRY_COMPOSITE
100
2, -3
*GEOMETRY_PIPE
2
0.5, 0.5, 0.1, 0.5, 0.5, 0.9, 0.3
*GEOMETRY_BOX
3
0.1, 0.3, 0.3, 0.9, 0.7, 0.7
*END