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1、ATextureMethodforVisualizationofElectromagneticVectorFieldJianyunCHAI',YuZHAO',WeiGUO',ZeshengTANG2'DepartmentofElectricalEngineering,TsinghuaUniversity,BeijingP.R.China1000842DepartmentofComputerScience&Technology,TsinghuaUniversity,BeijingP.R.China100084Phone:86-10-62775559
2、Fax:86-10-62782296Email:chaiiv~,maiI.tsinzhua.edu.cnAbslmcl--ThispaperpresentsanewconceptoftextureimagewithonlyonespacecomponentA=Akissufficienttorepresentmethodfordisplayingelectromagneticfields.FieldvectorsareanyplanarmagneticfieldB=BJ+Bj.Oneadvantageofmappedtoagrayscaleima
3、gethroughitsmagneticvectorreplacingthefluxdensitybythepotentialisthatthecontoursofpotentialmodulatedwithasinefunction.Theimagevisualizesathepotentialonthefieldplanewillalwayscoincidewiththesoftappearanceoffluxtubesinsteadoffluxlines.whosefluxlinesofthefield.orientationandwidt
4、hreflectthedirectionandamplitudeoffieldIfwecreateanimagecalledapotentialmap,onwhichthevectorsrespectively.Extensionalgorithmofilluminatedmodelanddisplayingtheeddycurrentfielddistributedonthreepixelswithsamepotentialvaluesarerenderedbythesamedimensionalconductorsurfacesbasedon
5、thisconceptarefurthercolor,thenthedirectionsofthefieldvectorscanbediscussed.Theimagesrenderedbythenewalgorithmsshowsomedistinguishedfromthevarianceofpixelcolors,asshowedinuniquepropertiesthatareratherdifferentfromothers.Fig.1.AlthoughthistechniquehasbeenwidelyusedinmuchInderT
6、erms--Electromagneticfields,scientificvisualizntion.commercialsoftwaretoshowthedistributionofscalars,suchastemperatureoramplitudeofthefieldvector,itsuffers1.INTRODUCTIONseriousproblemswhenusedtodisplayofvectorfields,forVISUALIZATIONofelectromagneticfieldsbycomputerexample,not
7、verycleardirectionalpatternscanbecapturedbygraphicsorimagesisanindispensableapproachininterpretinghumanvisionsfromviewingthepotentialmapimage,thoughthestructureofthefields.Comparedwiththegraphicmethodsenoughcolortoneshavebeenemployedinit.suchasfluxlinesorhedgehogs,thetexturem
8、ethodsdevelopedinthelastdecadeseemtobesuperiorinexpressingmoredetail
