The Geometry related classes.

Several documents describing these classes are listed below:

The main geometry class is documented in class TGeoManager.
Presentation/article at CHEP'03
Presentation at ROOT 2004
Presentation at ROOT 2005
Presentation at ROOT 2007

Classes
class	TGeoAtt
	Visualization and tracking attributes for volumes and nodes. More...

class	TGeoBoolNode
	Base class for Boolean operations between two shapes. More...

class	TGeoBranchArray
	An array of daughter indices making a geometry path. More...

class	TGeoBuilder
	Utility class for creating geometry objects.These will be associated with the current selected geometry manager object: More...

class	TGeoCacheState
	Class storing the state of the cache at a given moment. More...

class	TGeoCombiTrans
	Class describing rotation + translation. More...

class	TGeoDecayChannel
	A decay channel for a radionuclide. More...

class	TGeoElementRN
	Class representing a radionuclidevoid TGeoManager::SetDefaultRootUnits() { if ( fgDefaultUnits == kRootUnits ) { return; } else if ( gGeometryLocked ) { TError::Fatal("TGeoManager","The system of units may only be changed once BEFORE any elements and materials are created!"); } fgDefaultUnits = kRootUnits; }. More...

class	TGeoElementTable
	Table of elements. More...

class	TGeoElemIter
	Iterator for decay branches. More...

class	TGeoExtension
	ABC for user objects attached to TGeoVolume or TGeoNode. More...

class	TGeoGenTrans
	Most general transformation, holding a translation, a rotation and a scale. More...

class	TGeoGlobalMagField
	Global magnetic field manager. More...

class	TGeoHMatrix
	Matrix class used for computing global transformations Should NOT be used for node definition. More...

class	TGeoIdentity
	An identity transformation. More...

class	TGeoIterator
	A geometry iterator. More...

class	TGeoIteratorPlugin

class	TGeoManager
	The manager class for any TGeo geometry. More...

class	TGeoMatrix
	Geometrical transformation package. More...

class	TGeoNavigator
	Class providing navigation API for TGeo geometries. More...

class	TGeoNode
	A node represent a volume positioned inside another.They store links to both volumes and to the TGeoMatrix representing the relative positioning. More...

class	TGeoNodeCache
	Special pool of reusable nodes. More...

class	TGeoNodeMatrix
	A node containing local transformation. More...

class	TGeoNodeOffset
	Node containing an offset. More...

class	TGeoOpticalSurface
	This is a wrapper class to G4OpticalSurface. More...

class	TGeoParallelWorld
	Base class for a flat parallel geometry. More...

class	TGeoPatternFinder
	Base finder class for patterns. More...

class	TGeoPhysicalNode
	Physical nodes are the actual 'touchable' objects in the geometry, representing a path of positioned volumes starting with the top node: path=/TOP/A_1/B_4/C_3 , where A, B, C represent names of volumes. More...

class	TGeoPNEntry
	The knowledge of the path to the objects that need to be misaligned is essential since there is no other way of identifying them. More...

class	TGeoRCExtension
	Reference counted extension which has a pointer to and owns a user defined TObject. More...

class	TGeoRCPtr< T >
	A reference counting-managed pointer for classes derived from TGeoExtension which can be used as C pointer. More...

class	TGeoRegion
	Regions are groups of volumes having a common set of user tracking cuts. More...

class	TGeoRotation
	Class describing rotations. More...

class	TGeoScale
	Class describing scale transformations. More...

class	TGeoScaledShape
	A shape scaled by a TGeoScale transformation. More...

class	TGeoStateInfo
	Statefull info for the current geometry level. More...

class	TGeoTessellated
	Tessellated solid class. More...

class	TGeoTranslation
	Class describing translations. More...

class	TGeoUniformMagField
	Implementation for uniform magnetic field. More...

class	TGeoVector3
	Simple 3-vector representation. More...

class	TGeoVGConverter
	Geometry converter to VecGeom. More...

class	TGeoVGShape
	Bridge class for using a VecGeom solid as TGeoShape. More...

class	TGeoVolumeAssembly
	Volume assemblies. More...

class	TGeoVolumeMulti
	Volume families. More...

class	TGeoVoxelFinder
	Finder class handling voxels. More...

class	TVirtualGeoConverter
	Abstract class for geometry converters. More...

class	TVirtualGeoPainter
	Abstract class for geometry painters. More...

class	TVirtualGeoTrack
	Base class for user-defined tracks attached to a geometry. More...

class	TVirtualMagField
	Abstract class for magnetic field. More...

Classes