虚拟现实virtualreality的介绍20

广技师10计本2班21号汪志锋Whatarethese?HeadMountedDisplayVRData-gloveWhataretheyusedfor?PlayinggameworkingWhatisVirtualReality?•Definition•Features•CrucialTechnologies•ApplicationsDefinitionVirtualreality(VR)isatechnologywhichallowsausertointeractwithacomputer-simulatedenvironment.Features–Immersive–Interactive–Realtime–ViewercenteredCrucialTechnologies1.Displaysystem—immersetheuserinthevirtualworldandblockoutcontradictorysensoryimpressionsfromtherealworld2.Graphicsrenderingsystem—generates,at20to30framespersecond,theever-changingimages3.Trackingsystem—continuallyreportsthepositionandorientationoftheuser’sheadandlimbs4.Virtualworldconstructionandmaintenancesystem—buildingandmaintainingdetailedandrealisticmodelsofthevirtualworld1.Displaysystem•Displaytechnologyadvancesveryrapidly•VRdisplaysystemmustprovideimmersion•DesktopdisplaysarenotconsideredtobeVR–Hardlyblockouttherealworld–Donotpresentvirtualworldobjectsinlifesize–DonotcreatetheillusionofimmersionCAVE•CaveAutomaticVirtualEnvironment•Animmersivevirtualrealityenvironmentwhereprojectorsaredirectedto3,4,5or6ofthewallsofaroom-sizedcubeHead-MountedDisplay•Wornontheheadoraspartofahelmet•Asmalldisplayopticinfrontofoneoreacheye3.Trackingsystem•Trackingobserver’sbodycoordinate/headmotion•Challenges:–Accuracy（精度）–Ergonomics（人类工程学）–Systemlatency（系统时间延迟）HeadTrackingAtrackingmechanismregistersanyheadmotionbytheuser.Whenausermovesherhead,thescenechangesaccordingly,justasinreallife.Applications•Manufacture•Professiontraining•Game•EducationmanufactureProfessiontraininggameeducation