maya小球弹跳动画Word下载.docx

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