maya小球弹跳动画Word下载.docx
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maya小球弹跳动画Word下载.docx
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FullyuseGraphEditor'
smaineditingfunctiontoadjusttheanimationcurve
Completeabouncinganimationwiththerhythmicaudioprovided
Andcanbebroadcastwiththedefaultplayeroftheoperatingsystem
Creatingsimplemodelsandscenarios
1)createasimpleNurbsball,andScaleis1Units
2)createaPlaneasthereferenceground,andtheScaleis100units
3)createaSquashshaper:
Deform>
CreateNonlinear>
Squash.
4)usetheSquashshaperasthechildoftheball
5)importbackgroundsound
Analyzeanimationcontentandestablishsolutions
Oursmallballanimationrequiresajumpinthebackground,asenseofgravityinthejump,andanelasticcompressioneffectsimilartothatofarubberball
1)analyzethetempoofthebackgroundsoundandfindouttheexactlocationofthestressframe.Wedefinethestressframeasasmallballlandingframe,thententativelyselectthemiddleframeofthetwolandingframeforbouncingtheballtothehighestpointofthekeyframe
2)inadvance,considerthesmallballfromeachcontacttotheground,bouncingtothetop,andthenagaintothehorizontaldisplacementofthefallingground(whichisreadytomoveintheXdirection)andtheverticalheightofthejump(hereistheYdirection)
3)wemakeasimplebouncinganimationaccordingtothegeneralplanmentionedabove,withoutconsideringthebouncingeffectoftheball
4)observetheanimation,usethelawofphysics,adjustthecurve,makethebouncingofthesmallballmorephysical,reflectthefeelingofgravity
5)byusingtheSquashshaper,asmalldeformationeffectisaddedtothesmallball
6)adjusttheanimationcurvetoachievethedesiredeffect
7)forthesakeofpossibleanimation,lettheballcontinuetobounce
Analyzethesoundandcreatefivekeyframesfortheinitialjump
Thewholebackgroundsoundsforashorttime,andwe'
llmakesurethatthestarttimeframefortheslideris0andtheendframeis60,asshownbelow
Weanalyzebackgroundsounds,andknowthekeyframesofstress(thatis,keyframesofsmallballslanding)appearinthe4,24,44frame
Landingkeyframesetting
Tomovethetimetofourthframes,weselecttheballtosetfirstkeyframesinplace(Animate>
Set,key,orpresstheshortcutkey"
S"
);
Movethetimetotwenty-fourthframes,settheXaxisoftheballto10,andsetupsecondkeyframes;
Movethetimetoforty-fourthframes,settheXaxisoftheballto20,andsetthirdkeyframes;
Afterthelandingkeyframeisconfirmed,wewillalsosettheballtohitthekeyframeatthetop:
Movethetimetotheframebetween4and24,orfourteenthframes,withoutchangingothervalues.SettheYaxisto8inthechannelbar,andsetupfourthkeyframes;
Movethetimetotheframebetween24and44,orthirty-fourthframes,withoutchangingothervalues.SettheYaxisto8inthechannelbar,andsetupfifthkeyframes
Animation,theballalongtheXaxisinthepositivedirectionofasimplejumpanimation
Theballintherealphysicalworld
Ifwewatchcarefully,wewillfindthattheballlacksasenseofweightwhenitbounces,andwhenithitstheground,thereisafeelingofslidingandfloating.Forthisreason,weneedtoopenthecharteditortoadjustthemovementcurveofthesmallball
Beforeadjustment,
Let'
sanalyzethebouncingmotionoftheballfirst
Weliveinaworldfullofgravity,bouncetotheheightoftheballduetogravity,willgraduallyweakentotheelasticforce,eventuallybecomeslavestogravity,accelerationdownward,downwardwhenithittheground,theballmethardobstacles,gravityinstantaneousbouncingupintomotion,sotheballagainandagain,keepdoingexerciseandgravitybouncingup,untilthecauseoftheconsumptionofenergyduetofrictionandstopsmoving.(inthisexercise,wedonotconsiderthefrictionfromthebouncingballmovementisalwaysinfinitecontinued)
Inordertoachievethis,wemustputtheballintoregulatingspeedfelltotheground,hitthegroundaftertherapiddecelerationbecomesanupwardmovement.Whenjumpingtothehighestpoint,theupwardmovementtendstozero,andthenconvertedtoacceleratethedownwardmovement.
Edittheanimationcurveusingthecharteditor
Openthecharteditor,selecttheTranslateYoftheball,anddisplaythemovementoftheYaxis
Selectthekeyframe,choosetheCurves>
WeightedTangentscommand,thecurvesbecometheweightcurve.Inthisway,wecanedittangentweightsmorereasonabletoachievethechangeofthespeed.
ClickonthetoolbartomakethefivekeyframesFlatcutlines
Editanimationcurves
Select3keyframesoftheball,clickthegroundtangentofthelandingframe,soastoachievetheinstantchangeo
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