Event Display

The Event Display classes.

Eve is a ROOT module based on experiment-independent part of the ALICE event display developed in cooperation between ALICE offline project and ROOT during the last two years. It has been used in ALICE for more than a year to perform high-level event visualization, debugging of simulation and reconstruction code as well as for raw-data visualization.

Papers describing Eve (older ones still using the old name - Reve):

• [EVE - Event Visualization Environment of the ROOT framework] (http://pos.sissa.it//archive/conferences/070/103/ACAT08_103.pdf) presented at ACAT 2008.
• [Event Visualization Environment of the ALICE experiment] (http://indico.cern.ch/contributionDisplay.py?contribId=25&confId=13356) presented at ROOT Workshop 2007.
• [Raw-data display and visual reconstruction validation in ALICE] (http://indico.cern.ch/contributionDisplay.py?contribId=442&sessionId=23&confId=3580) presented at CHEP 2007.

Eve is built on top of ROOT's GUI, GL and GED infrastructure and delivers the following main features:

• Base-classes for representation of visual objects that can be presented in list-tree views, object-editors and rendered via OpenGL (TEveElement and sub-classes).
• Application manager class TEveManager for top-level management of elements, GUI components, geometries and events;
• Classes for presentation of full TGeo geometries (TEveGeoNode and TEveGeoTopNode) as well as of simplifed geometries via extraction of shape-data (TEveGeoShape).

CMS geometry

• Classes for presentation of trajectories or tracks (TEveTrack, TEveTrackPropagator) and hits or clusters (TEvePointSet, TEvePointSetArray).

A simulated ALICE pp@14TeV event in 3D

• Base-classes for presentation of raw-data or digits (TEveDigitSet, TEveQuadSet and TEveBoxSet). A collection of objects can be assigned common signal-to-color mapping (TEveRGBAPelette) and surrounding frame (TEveFrameBox).

Hexagonal and rectangular digits

• Base-classes for 2D projections with dynamically controllable fish-eye magnification of the vertex region (TEveProjectionManager and TEveProjection). Tracks, points and geometries can be projected automatically. R-phi and Rho-z projections are currently supported.

A r-phi projection with fish-eye transformation of a simulated ALICE pp@14TeV event

• TriangleSet class for presentation of generic triangle meshes.

3DS shuttle object

Classes
class	TEveCaloData::CellData_t
	Cell data inner structure. More...
class	TEveCaloData::CellGeom_t
	Cell geometry inner structure. More...
class	TEve3DProjection
	3D scaling projection. More...
class	TEveArrow
	Class used for display of a thick arrow. More...
class	TEveArrowEditor
	GUI editor for TEveArrow. More...
class	TEveArrowGL
	OpenGL renderer class for TEveArrow. More...
class	TEveBox
	3D box with arbitrary vertices (cuboid). More...
class	TEveBoxGL
	OpenGL renderer class for TEveBox. More...
class	TEveBoxProjected
	Projection of TEveBox. More...
class	TEveBoxProjectedGL
	OpenGL renderer class for TEveBoxProjected. More...
class	TEveBoxSet
	Collection of 3D primitives (fixed-size boxes, boxes of different sizes, or arbitrary sexto-epipeds, cones). More...
class	TEveBoxSetGL
	A GL rendering class for TEveBoxSet. More...
class	TEveBrowser
	Specialization of TRootBrowser for Eve. More...
class	TEveCalo2D
	Visualization of a calorimeter event data in 2D. More...
class	TEveCalo2DGL
	OpenGL renderer class for TEveCalo2D. More...
class	TEveCalo3D
	Visualization of a calorimeter event data in 3D. More...
class	TEveCalo3DEditor
	GUI editor for TEveCalo3D. More...
class	TEveCalo3DGL
	OpenGL renderer class for TEveCalo3D. More...
class	TEveCaloData
	A central manager for calorimeter event data. More...
class	TEveCaloDataHist
	A central manager for calorimeter data of an event written in TH2F. More...
class	TEveCaloDataVec
	Calo data for universal cell geometry. More...
class	TEveCaloLego
	Visualization of calorimeter data as eta/phi histogram. More...
class	TEveCaloLegoEditor
	GUI editor for TEveCaloLego. More...
class	TEveCaloLegoGL
	OpenGL renderer class for TEveCaloLego. More...
class	TEveCaloLegoOverlay
	GL-overlay control GUI for TEveCaloLego. More...
class	TEveCaloViz
	Base class for calorimeter data visualization. More...
class	TEveCaloVizEditor
	GUI editor for TEveCaloEditor. More...
class	TEveChunkManager
	Vector-like container with chunked memory allocation. More...
class	TEveCompositeFrame
	Abstract base-class for frame-slots that encompass EVE-windows (sub-classes of TEveWindow). More...
class	TEveCompositeFrameInMainFrame
	An EVE window-slot contained within a TGMainFrame. More...
class	TEveCompositeFrameInPack
	An EVE window-slot contained within one frame of a TGPack. More...
class	TEveCompositeFrameInTab
	An EVE window-slot contained within one tab of a TGTab. More...
class	TEveCompound
	Description of TEveCompound. More...
class	TEveCompoundProjected
	Description of TEveCompoundProjected. More...
class	TEveContextMenu
	Specialization of TContext menu. More...
class	TEveDigitSet
	Base-class for storage of digit collections; provides transformation matrix (TEveTrans), signal to color mapping (TEveRGBAPalette) and visual grouping (TEveFrameBox). More...
class	TEveDigitSetEditor
	Editor for TEveDigitSet class. More...
class	TEveDigitSetGL
	OpenGL renderer class for TEveDigitSet. More...
class	TEveElement
	Base class for TEveUtil visualization elements, providing hierarchy management, rendering control and list-tree item management. More...
class	TEveElementEditor
	Editor for TEveElement class. More...
class	TEveElementList
	A list of TEveElements. More...
class	TEveElementListProjected
	A projected element list – required for proper propagation of render state to projected views. More...
class	TEveEventManager
	Base class for event management and navigation. More...
class	TEveException
	Exception class thrown by TEve classes and macros. More...
class	TEveFrameBox
	Description of a 2D or 3D frame that can be used to visually group a set of objects. More...
class	TEveFrameBoxGL
	A class encapsulating GL rendering of TEveFrameBox via a static member function. More...
class	TEveGDoubleValuator
	Composite GUI element for selection of range (label, two number-entries and double-slider). More...
class	TEveGedEditor
	Specialization of TGedEditor for proper update propagation to TEveManager. More...
class	TEveGedNameFrame
	Specialization of TGedNameFrame used in EVE. More...
class	TEveGedNameTextButton
	Specialization of TGTextButton for EVE name frame. More...
class	TEveGeoManagerHolder
	Exception safe wrapper for setting gGeoManager. More...
class	TEveGeoNode
	Wrapper for TGeoNode that allows it to be shown in GUI and controlled as a TEveElement. More...
class	TEveGeoNodeEditor
	Editor for TEveGeoNode class. More...
class	TEveGeoPolyShape
	Description of TEveGeoPolyShape. More...
class	TEveGeoShape
	Wrapper for TGeoShape with absolute positioning and color attributes allowing display of extracted TGeoShape's (without an active TGeoManager) and simplified geometries (needed for non-linear projections). More...
class	TEveGeoShapeExtract
	Globally positioned TGeoShape with rendering attributes and an optional list of daughter shape-extracts. More...
class	TEveGeoShapeProjected
	A 3D projected TEveGeoShape. More...
class	TEveGeoTopNode
	A wrapper over a TGeoNode, possibly displaced with a global trasformation stored in TEveElement. More...
class	TEveGeoTopNodeEditor
	Editor for TEveGeoTopNode class. More...
class	TEveGListTreeEditorFrame
	Composite GUI frame for parallel display of a TGListTree and TEveGedEditor. More...
class	TEveGridStepper
	Provide discrete position coordinates for placement of objects on regular grids. More...
class	TEveGridStepperEditor
	Editor for TEveGridStepper class. More...
class	TEveGridStepperSubEditor
	Sub-editor for TEveGridStepper class. More...
class	TEveGTriVecValuator
	Composite GUI element for setting three numerical values (label, three number-entries). More...
class	TEveGValuator
	Composite GUI element for single value selection (supports label, number-entry and slider). More...
class	TEveGValuatorBase
	Base class for composite GUI elements for setting of numeric values. More...
class	TEveJetCone
	Draws a jet cone with leading particle is specified in (eta,phi) and cone radius is given. More...
class	TEveJetConeEditor
	GUI editor for TEveJetCone. More...
class	TEveJetConeGL
	OpenGL renderer class for TEveJetCone. More...
class	TEveJetConeProjected
	Projection of TEveJetCone. More...
class	TEveJetConeProjectedGL
	OpenGL renderer class for TEveJetConeProjected. More...
class	TEveLegoEventHandler
	A base class of TGLEventHandler. More...
class	TEveLine
	An arbitrary polyline with fixed line and marker attributes. More...
class	TEveLineEditor
	Editor for TEveLine class. More...
class	TEveLineGL
	GL-renderer for TEveLine class. More...
class	TEveLineProjected
	Projected copy of a TEveLine. More...
class	TEveElement::TEveListTreeInfo
	Structure holding information about TGListTree and TGListTreeItem that represents given TEveElement. More...
class	TEveListTreeItem
	Special list-tree-item for Eve. More...
class	TEveMacro
	Sub-class of TMacro, overriding Exec to unload the previous version and cleanup after the execution. More...
class	TEveMagField
	Abstract base-class for interfacing to magnetic field needed by the TEveTrackPropagator. More...
class	TEveMagFieldConst
	Implements constant magnetic field, given by a vector fB. More...
class	TEveMagFieldDuo
	Implements constant magnetic filed that switches on given axial radius fR2 from vector fBIn to fBOut. More...
class	TEveManager
	Central application manager for Eve. More...
class	TEvePad
	This was intended as a TPad wrapper to allow smart updates of groups of pads. More...
class	TEvePadHolder
	Exception safe wrapper for setting gPad. More...
class	TEveParamList
	Collection of named parameters. More...
class	TEveParamListEditor
	GUI editor for TEveParamList. More...
class	TEvePathMarkT< TT >
	Special-point on track: More...
class	TEvePlot3D
	Description of TEvePlot3D. More...
class	TEvePlot3DGL
	OpenGL renderer class for TEvePlot3D. More...
class	TEvePointSelector
	TEvePointSelector is a sub-class of TSelectorDraw for direct extraction of point-like data from a Tree. More...
class	TEvePointSelectorConsumer
	TEvePointSelectorConsumer is a virtual base for classes that can be filled from TTree data via the TEvePointSelector class. More...
class	TEvePointSet
	TEvePointSet is a render-element holding a collection of 3D points with optional per-point TRef and an arbitrary number of integer ids (to be used for signal, volume-id, track-id, etc). More...
class	TEvePointSetArray
	An array of point-sets with each point-set playing a role of a bin in a histogram. More...
class	TEvePointSetArrayEditor
	Editor for TEvePointSetArray class. More...
class	TEvePointSetProjected
	Projected copy of a TEvePointSet. More...
class	TEvePolygonSetProjected
	A set of projected polygons. More...
class	TEvePolygonSetProjectedGL
	GL-renderer for TEvePolygonSetProjected class. More...
class	TEveProjectable
	Abstract base-class for non-linear projectable objects. More...
class	TEveProjected
	Abstract base class for classes that hold results of a non-linear projection transformation. More...
class	TEveProjection
	Base-class for non-linear projections. More...
class	TEveProjectionAxes
	Axes for non-linear projections. More...
class	TEveProjectionAxesEditor
	GUI editor for TEveProjectionAxes. More...
class	TEveProjectionAxesGL
	OpenGL renderer class for TEveProjectionAxes. More...
class	TEveProjectionManager
	Manager class for steering of projections and managing projected objects. More...
class	TEveProjectionManagerEditor
	GUI editor for TEveProjectionManager class. More...
class	TEveQuadSet
	Supports various internal formats that result in rendering of a set of planar (lines, rectangles, hexagons with shared normal) objects. More...
class	TEveQuadSetGL
	GL-renderer for TEveQuadSet class. More...
class	TEveRefBackPtr
	Base-class for reference-counted objects with reverse references to TEveElement objects. More...
class	TEveRefCnt
	Base-class for reference-counted objects. More...
class	TEveRGBAPalette
	A generic, speed-optimised mapping from value to RGBA color supporting different wrapping and range truncation modes. More...
class	TEveRGBAPaletteEditor
	Editor for TEveRGBAPalette class. More...
class	TEveRGBAPaletteOverlay
	Description of TEveRGBAPaletteOverlay. More...
class	TEveRGBAPaletteSubEditor
	Sub-editor for TEveRGBAPalette class. More...
class	TEveRhoZProjection
	Transformation from 3D to 2D. More...
class	TEveRPhiProjection
	XY projection with distortion around given center. More...
class	TEveScalableStraightLineSet
	Straight-line-set with extra scaling, useful for projectables that need to be scaled in accordance with an external object. More...
class	TEveScene
	Eve representation of TGLScene. More...
class	TEveSceneInfo
	TEveUtil representation of TGLSceneInfo. More...
class	TEveSceneList
	List of Scenes providing common operations on TEveScene collections. More...
class	TEveSecondarySelectable
	Semi-abstract interface for classes supporting secondary-selection. More...
class	TEveSelection
	Make sure there is a SINGLE running TEveSelection for each selection type (select/highlight). More...
class	TEveSelectorToEventList
	TSelector that stores entry numbers of matching TTree entries into an event-list. More...
class	TEveShape
	Abstract base-class for 2D/3D shapes. More...
class	TEveShapeEditor
	GUI editor for TEveShape. More...
class	TEveStraightLineSet
	Set of straight lines with optional markers along the lines. More...
class	TEveStraightLineSetEditor
	Editor for TEveStraightLineSet class. More...
class	TEveStraightLineSetGL
	GL-renderer for TEveStraightLineSet class. More...
class	TEveStraightLineSetProjected
	Projected replica of a TEveStraightLineSet. More...
class	TEveText
	TEveElement class used for displaying FreeType GL fonts. More...
class	TEveTextEditor
	GUI editor for TEveText. More...
class	TEveTextGL
	OpenGL renderer class for TEveText. More...
class	TEveTrack
	Visual representation of a track. More...
class	TEveTrackEditor
	Editor for TEveTrack class. More...
class	TEveTrackGL
	GL-renderer for TEveTrack class. More...
class	TEveTrackList
	A list of tracks supporting change of common attributes and selection based on track parameters. More...
class	TEveTrackListEditor
	Editor for TEveTrackList class. More...
class	TEveTrackListProjected
	Specialization of TEveTrackList for holding TEveTrackProjected objects. More...
class	TEveTrackProjected
	Projected copy of a TEveTrack. More...
class	TEveTrackProjectedGL
	GL-renderer for TEveTrackProjected class. More...
class	TEveTrackPropagator
	Holding structure for a number of track rendering parameters. More...
class	TEveTrackPropagatorEditor
	GUI editor for TEveTrackPropagator. More...
class	TEveTrackPropagatorSubEditor
	Sub-editor for TEveTrackPropagator class. More...
class	TEveTrans
	TEveTrans is a 4x4 transformation matrix for homogeneous coordinates stored internally in a column-major order to allow direct usage by GL. More...
class	TEveTransEditor
	Editor for TEveTrans class. More...
class	TEveTransSubEditor
	Sub-editor for TEveTrans class. More...
class	TEveTriangleSet
	Made from a list of vertices and a list of triangles (triplets of vertex indices). More...
class	TEveTriangleSetEditor
	Editor for TEveTriangleSet class. More...
class	TEveTriangleSetGL
	GL-renderer for TEveTriangleSet class. More...
class	TEveUtil
	Standard utility functions for Eve. More...
class	TEveVector2T< TT >
	Minimal, templated two-vector. More...
class	TEveVector4T< TT >
	Minimal, templated four-vector. More...
class	TEveVectorT< TT >
	Minimal, templated three-vector. More...
class	TEveViewer
	Eve representation of TGLViewer. More...
class	TEveViewerList
	List of Viewers providing common operations on TEveViewer collections. More...
class	TEveViewerListEditor
	GUI editor for TEveViewerList. More...
class	TEveVSD
	Visualization Summary Data - a collection of trees holding standard event data in experiment independent format. More...
class	TEveWindow
	Abstract base-class for representing eve-windows. More...
class	TEveWindowEditor
	GUI editor for TEveWindow. More...
class	TEveWindowFrame
	Encapsulates TGFrame into an eve-window. More...
class	TEveWindowManager
	Manager for EVE windows. More...
class	TEveWindowPack
	Encapsulates TGPack into an eve-window. More...
class	TEveWindowSlot
	Description of TEveWindowSlot. More...
class	TEveWindowTab
	Encapsulates TGTab into an eve-window. More...
class	TEveManager::TExceptionHandler
	Exception handler for Eve exceptions. More...