Graphics Requirements for G4 Trajectories (draft: hastily prepared for trajectories parallel session)

Transcription

1 Graphics Requirements for G4 Trajectories (draft: hastily prepared for trajectories parallel session) Geant4 Workshop, CERN - October 2002 Joseph Perl

2 Problem with Existing Trajectories UDSKLFVGULYHUVKDYHDFFHVVWRGHWDLOHGLQIRUPDWLRQDERXW JHRPHWU\VLQFHWKHVFHQH+DQGOHUKDVDFFHVVWRSK\VLFDO YROXPHHWFDQGFDQSUHVHQWWKLVLQIRUPDWLRQWRWKHHQGXVHU WKURXJKODEHOVRQJUDSKLFVREMHFWVRUWKURXJKSLFNLQJ UDSKLFVGULYHUVKDYHQRDFFHVVWRGHWDLOHGLQIRUPDWLRQDERXW WUDMHFWRULHVRUVHQVLWLYHGHWHFWRUKLWV7KHVFHQH+DQGOHU RQO\VHHVWKLVGDWDDVJUDSKLFVSULPLWLYHVQRSRLQWHUEDFNWR WKHWUDMHFWRU\ UDSKLFVGULYHUVKDYHQRDFFHVVWRDX[LOLDU\SRLQWV7KHVH SRLQWVDUHQRWSHUVLVWHGORQJHQRXJKIRUJUDSKLFVWRXVH WKHPKHQFHZHFDQ WGUDZVPRRWKWUDMHFWRULHV

3 Auxiliary Points 2QWKLVWRSLF,RQO\NQRZZKDW, YHOHDUQHGIURP -RKQ$OOLVRQ6HHKLVPDLORI6HSW

4 Effect of lack on information: Example T0

5 Picking on Detector Volumes Gives Detailed Attributes

6 Picking on Trajectory Gives No Details

7 Picking on Trajectory if Graphics Drivers had Better Access to Trajectory Information

8 Proposal for Better Graphics from Trajectories LYHVFHQH+DQGOHUD'UDZ7UDMHFWRULHVPHWKRGZLWK SRLQWHUEDFNWR7UDMHFWRU\ 3HUVLVW$X[LOLDU\3RLQWVORQJHQRXJKIRUVFHQH+DQGOHUWR XVHWKHPWRGUDZVPRRWKWUDMHFWRULHV $OORZDWWDFKPHQWRIDUELWUDU\DWWULEXWHVWR7UDMHFWRULHV DQG7UDMHFWRU\3RLQWVDQGVHQVLWLYHGHWHFWRUKLWV $VXFFHVVIXOVFKHPHIRUVXFKDUELWUDU\DWWULEXWHVKDV EHHQXVHGLQ+HS5HSIRUVHYHUDO\HDUV 7KHSURSRVDOLV27IRUWRGHSHQGRQ+HS5HS 7KHSURSRVDOLVRQO\IRUWRLQFRUSRUDWHWZRVPDOOFODVVHV WKDWKROG³+HS5HSVW\OH DWWULEXWHV 7KH+HS5HSDWWULEXWHFODVVHVDUHMXVWWZRVLPSOHFODVVHV XVHGLQ+HS5HSWKH\DUHQRWWKHHQWLUH+HS5HSGHVLJQ

9 The Attribute Classes : a Generic Interface Definition for HEP Event Display Representables 8 Comments: String[] +getinstancetreetop( InstanceTreeName: String, InstanceTreeVersion: String) :InstanceTree; +gettypetree( TypeTreeName: String, TypeTreeVersion: String) :TypeTree; +getinstances( InstanceTreeName: String, InstanceTreeVersion: String, TypeNames: String[]) :InstanceTree; +getinstancesafteraction( InstanceTreeName: String, InstanceTreeVersion: String, TypeNames: String[], Actions:Action[], GetPoints: Boolean, GetDrawAtts: Boolean, GetNonDrawAtts: Boolean, InvertAtts: String[]) :InstanceTree; +getlayerorder( ) :String[]; +checkforexception( ) :String; TypeTree ID: TreeID Type Name: String Desc: String InfoURL: String AttDef Name: String Desc: String Category: String Extra: String Comments: String[] InstanceTree ID: TreeID Linked by TypeTreeID:HRTreeID TypeTreeID InstanceTreeIDs:HRTreeID[] Linked by AttDef Name Linked by TypeName AttValue AttDefName: String Value: Any ShowLabel: Int Joseph Perl 2 TreeID Name:String Version:String Instance TypeName: String Point X,Y,Z: Double Action Name:String Expression:String 0//2002

10 The Attribute Classes +HS5HS $WW'HI DPH6WULQJ 'HVF6WULQJ &DWHJRU\6WULQJ ([WUD6WULQJ +HS5HS $WW9DOXH $WW'HIDPH6WULQJ 9DOXH$Q\ 6KRZ/DEHO,QW,Q&WKH³DQ\ LVKDQGOHGDVD6WULQJWKDWLV LQWHUSUHWHGDFFRUGLQJWRDQH[WUDPHPEHURIWKH $WW'HIFDOOHGYDOXH7\SH $WW'HI DPH6WULQJ 'HVF6WULQJ &DWHJRU\6WULQJ ([WUD6WULQJ 9DOXH7\SH6WULQJ $WW9DOXH $WW'HIDPH6WULQJ 9DOXH6WULQJ 6KRZ/DEHO,QW

11 G4AttDef.h now in graphics_reps

12 G4AttValue.h now in graphics_reps

13 is Well Documented Elsewhere )RUGHWDLOVRQWKHH[DFWXVHRI+HS5HS$WWULEXWHV VHHWKH+HS5HS+RPH3DJHDW KWWSKHSUHSIUHHKHSRUJ,QSDUWLFXODUVHHWKHGHWDLOHG+HS5HSZULWHXSDW KWWSKHSUHSIUHHKHSRUJKHSUHS&RPSOHWHSSW KWWSKHSUHSIUHHKHSRUJKHSUHS&RPSOHWHSGI

14 Attribute Categories Any number of Attributes can be hung from a Type, Instance or Point. There are four Categories of Attributes: Draw Attributes (such as thickness and color) can be modified in the client through a draw attribute editor Physics Attributes (such as track momentum or hit error) can be used for visibility cuts (client side or server side) PickAction Attributes define special things to do when the user picks on the Representable (such as remove hit and refit track) Association Attributes define loose associations between Representables (such as track cluster matching) Type Name: String Desc: String InfoURL: String AttDef Name: String Desc: String Category: String Extra: String Linked by AttDef Name Linked by TypeName AttValue AttDefName: String Value: Any ShowLabel: Int Instance TypeName: String Point X,Y,Z: Double To allow for the possible addition of new Categories without backwards compatibility problems, we keep Category as a general String, not an Enum. 38 Joseph Perl 2 0//2002

15 AttDef Name: String Desc: String Category: String Extra: String Attribute Examples Linked by AttDef Name AttValue AttDefName: String Value: Any ShowLabel: Int Name Desc Extra Category Value Color Color unused Draw Blue DrawAs DrawAs unused Draw Ellipsoid Pt Transverse Momentum GeV Physics.76 PID Particle ID unused Physics Pion System Detector System unused Physics Vertex Detector Remove Remove Hit & Refit Track remove PickAction Track(5).Hit(8) Cluster Cluster Association ID Association 7 Track Track Association TrkNum Association 5 39 Joseph Perl 2 0//2002

16 The Way Forward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

17 Extra Slide more implementation details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