The tree decoding routine transfers the volume information during decoding to the relevant shape routine which writes the volumes into the SET file. Every different shape has its own routine. For example, the simplest shape, BOX, is written in the SET format as follows:
,N1,:5,2#60,X,Y,Z
@302,N2#317,-DX,-DY,-DZ
@100,N3,:5,2,:9,'Name'#101,!N1,!N2
Where
The rectangular parallelepiped is first defined with the given parameters. Then the translation of coordinates is defined. The translation is necessary since GEANT and SET use origins in different places. Finally, the transformation operation is defined for a constructed solid which in this case is the translation of the coordinates of a primitive solid. The GEANT shapes are converted to SET as follows:
| SHAPE | DEFINITION IN SET |
| BOX | rectangular parallelepiped |
| TRD1 | ruled solid between 2 faces |
| TRD2 | ruled solid between 2 faces |
| TRAP | ruled solid between 2 faces |
| TUBE | solid of revolution of a face |
| TUBS | solid of revolution of a face |
| CONE | solid of revolution of a face |
| CONS | solid of revolution of a face |
| SPHE | sphere |
| PARA | ruled solid between 2 faces |
| PGON | first segment ruled solid, other segments copied and rotated, finally boolean union for all the segments |
| PCON | solid of revolution of a face |
| ELTU | solid of linear extrusion of a face |
| HYPE | not implemented |
| GTRA | ruled solid between 2 faces |
| CTUB | solid of revolution and boolean subtraction by 2 half-spaces |