Programming Of Autonomous Characters Based On Probabilistic Automata And Personality

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1、COMPUTERANIMATIONANDVIRTUALWORLDSComp.Anim.VirtualWorlds2004;15:319326(DOI:10.1002/cav.35)******************************************************************************************************BehavioralprogrammingofautonomouscharactersbasedonprobabilisticautomataandpersonalityByLucaChittaro*andM

2、ilenaSerra************************************************************************************Thispaperpresentsasystemforrealisticbehavioralprogrammingofvirtualcharacters,basedonpersonalityandprobabilisticautomata.WedescribepersonalitybyusingtheFive-FactorModelandachieveautonomythroughagoal-orie

3、ntedapproach.Eachcharacterperceivesthesurroundingworld,decideshowtobehaveandactsontheenvironmentaccordingtoitspersonalityandtoitsgoals.Thechiefideaexploredbytheproposedapproachisthatpersonalityhasaprobabilisticinfluenceonbehaviorselectioninsteadofadeterministicone.Differentbehaviorsequencesavaila

4、bletoachieveagoalaremodeledusingprobabilisticautomataandmakingprobabilitydependentoncharacterpersonality.Thisleadstonon-repetitivebehaviors,whoseevolutionisnotforeseeable.Thepaperfirstmotivatestheapproachinthecontextofcybertherapy.Then,itsummarizesrelatedworkandillustratesindetailtheproposedappro

5、ach.Finally,itpresentsobtainedresultsanddiscussesthemainlimitationsoftheimplementedsystem.Copyright#2004JohnWiley&Sons,Ltd.KEYWORDS:virtualcharacters;personality;behavioralautonomy;probabilisticautomataIntroductionelicitparticularemotionsorstatesinapatient.Oneofthemostsignificantsuccessesinthisfie

6、ldhasbeenreachedinthetreatmentofphobias:patientsareex-Averyimportantchallengeforthevirtualrealityposedtoobjectsandsituationsthatcausetheirphobia,communityistocreateVirtualEnvironments(VEs)butthisexposuretakesplaceinaVEinsteadoftherealinhabitedbyrealisticcharacters.Realismshouldideally2,3world(Vi

7、rtualRealityExposureTherapy,VRET).Anbeachievedinalllayersofthemodelingpyramid,i.e.importantfactorfortheeffectivenessofcybertherapyisgeometric,kinematic,physical,behavioralandcogni-1thesenseofpresencefeltbypatients,thatishigh