3d user interface technique

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1、3DuserinterfacetechniquepresentedbyTanLiangIntroductionUserinterface(UIs)arebecomingmorediverseincludespatialdevices.Withnewtechnologynewproblemshavealsobeenrevealed.Understandingandactionofthephysicalworldcan’tberepresentedaccuratelyinacomputersimulation.Simp

2、lyadaptingtraditionalinterfacestylesto3Ddoesnotsolvethisproblem.Novel3DUIs,basedonreal-worldinteractionmustbedeveloped.FunctionalcomponentsControlFeedbackVisualizationNavigationManipulationAccessControlControlinterpretsuserinputsasmeaningfulactionsinanapplicat

3、ion.Controladdressesonedirectionoftheinteractiondialoguethatoccursbetweentheuserandtheapplication.InputdevicesInputinterpretationControlbasicsCoordinatemappingMixedusageInputdevicesInputdevicesarethephysicaltoolsusedtoimplementvariousinteractiontechniques.Inpu

4、tdevicescanberoughlycategorizedbasedonthetypesofeventtheygenerate.Discreteinputdevice:pinchglovesContinuousinputdevices:positioning/orientationtracksanddataglovesHybridinputdeviceSpeechinputInputinterpretationInputinterpretationinvolvesaskingtherightquestionsf

5、oragivingcontrolsituation,andansweringthosequestionssuchthatrawinputsaretranslatedintodirectedandquantifiablecontrolresults.Often,foragivingsituationtherecanbemanyequallyvalidanswers.Theanswersdeterminethepersonalityofthecontrol.Inputdevicecanalsobeusedfornon-

6、spatialcontrol.ControlbasicsControlprimitives:Themostprimitivelevelofcontrolinterpretationinvolvesthetranslationofarawmouseinputintosomethingmoreusefulfortheapplication.Aswithmostcontroltechniques,interpretationscanbeusedaloneorincombination.Mousegestures:Ages

7、tureinvolvesinterpretingthemousepositionandmousebuttonstatetogetherovertime,withthebuttonstateoramodifierkeyindicatingthestartandendofthegesture.ControlprimitivesAbsoluteorigin:Thecontroloriginispredefinedinthemousespaceatsamelocationobvioustotheuser.Theadvant

8、ageisthatthereferencepointisalwaysinthesameplacefortheuser.Disadvantagesarethatthedisplayscreendefinestheboundsontheoutputvalue.Relativeorigin:Therelativeoriginisestablishedonthefl