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Chapter 13: Flashlight - Revolve Curves
Creatingsurfacesfromcurvesandjoiningthesurfacestogetherallowsyoumuchgreaterfreedom.Thistutorialintroducestheconceptofdrawingcurvesandonemethodofcreatingsurfacesfromthosecurves.
Youwilllearnhowto: Drawfree-formcurvesbasedonanexistingobject. Editcontrolpoints. Revolvesurfacesaroundanaxis.
Revolvingcurvesisagoodmethodforcreatingtubularshapeslikevases,wineglasses,andchairlegs.Youaregoingtouseabasicflashlightasaguidefordrawingthecurvesyouwillneedforthenewmodel.Usingthebasicflashlightgivesyouaframeofreferencefordecidingaboutthesizeandshapeoftheobject.
To get started4 OpenthetutorialmodelfileFlashlight.3dm.
Set up the modelYouaregoingtotracearoundtheoldflashlight.Tomakethiseasier,youwilllocktheobjects.Whenobjectsarelocked,youcanseethemandsnaptothem,butyoucannotselectthem.Thiskeepstheobjectsfrominterferingwhenyouwanttoselectthingscloseby.Youcanstilluseobjectsnapstosnaptolockedobjects.Youwillthencreatesomecurvesandrevolvethemtomakethenewflashlight.
Lock the flashlight objects1. Selectalltheobjects.
PresstheCtrl and Akeystoselectalltheobjectsinthemodel.
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Chapter 13: Flashlight - Revolve Curves
2. OntheEditmenu,clickVisibility > Lock.
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Chapter 13: Flashlight - Revolve Curves
Draw a centerlineDrawaconstructioncenterlinethroughthecenteroftheoldflashlight.
Draw the construction centerline1. OntheCurvemenuclickLine > Single Line.2. AttheStart of lineprompt,usetheCenterobjectsnaptoplacethestartofthelineatthecenter
oftheflashlightbase.3. AttheEnd of lineprompt,turnOrthoon,anddrawthelinethroughtheexactcenteroftheold
flashlight.
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Chapter 13: Flashlight - Revolve Curves
Draw the body profile curveYouaregoingtodrawaprofilecurvethatyouwillusetorevolvetocreatetheflashlightbody.Aprofilecurvedefinesacross-sectionofonehalfofthepart.
Draw the body curve1. Onthestatusbar,clicktheLayerpaneandmakethelayerFree Form Bodycurrent.2. OntheCurvemenu,clickFree-Form > Control Points.3. AttheStart of curveprompt,intheFrontviewport,startdrawingacurvearoundtheflashlight
bodyasillustrated.
UsetheEndobjectsnaptostartthecurveattheendoftheconstructioncenterline.UsetheNearobjectsnaptoendthecurveontheconstructioncenterline.Startingandendingthecurveexactlyonthelineisimportantsothatlaterwhenyourevolvethecurvetocreateasolid,therewillbenogapsoroverlappingparts.Whendrawingthecurve,useOrthotocontrolthefirsttwo(1and2)pointsandthelasttwopoints(3and4)onthecurve.Ifthefirsttwopointsandthelasttwopointsareplacedinastraightline,thecurvewillstartandendtangenttothatline.
4. Whenyouhaveplacedthelastcontrolpoint,pressEntertofinishdrawingthecurve.Toplacethelasttwopointsinastraightlinewitheachother,useGrid Snap,Ortho,orPerpobjectsnap.
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Chapter 13: Flashlight - Revolve Curves
Draw the lens profile curveMakeanotherprofilecurveforthelens.
Create the lens1. OntheCurvemenu,clickFree-Form > Control Points.2. AttheStart of curveprompt,intheFrontviewport,placethefirstcontrolpointofthelens
profile.UsetheNearobjectsnaptostartandendthecurveontheconstructioncenterline.Placecontrolpointsintheupperpartofthelenscurvesoitcrossesthebodyprofilecurve.
Get the old flashlight out of your way1. OntheEditmenu,clickVisibility > Unlock.2. Selectalltheobjectsexceptthetwoprofilecurvesyoujustdrewandtheswitchsphere.3. OntheEditmenu,clickVisibility > Hide.
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Chapter 13: Flashlight - Revolve Curves
Build the flashlight bodyTomakethebody,youwillrevolvetheprofilecurve360degrees.Youwillusetheendpointofthecurveandorthotoestablishtherotationaxis.
Create the flashlight body1. OntheSurfacemenu,clickRevolve.2. AttheSelect curve to revolveprompt,selectthebodyprofilecurve.3. AttheStart of revolve axisprompt,usetheEndsnaptosnaptooneendoftheprofilecurve.
4. AttheEnd of revolve axisprompt,turnOrthoon,andspecifytherevolveaxislineasillustrated.
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Chapter 13: Flashlight - Revolve Curves
5. IntheStart angle...prompt,clicktheFullCircleoption.
Create the lensNowrevolvethelensprofilecurveinthesamewayasthebody.
Revolve the lens profile curve1. OntheSurfacemenu,clickRevolve.2. AttheSelect curve to revolveprompt,selectthelensprofilecurve.3. AttheStart of revolve axisprompt,useEndobjectsnaptolocatetheendpointofoneofthecurve
profiles.
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Chapter 13: Flashlight - Revolve Curves
4. AttheEnd of revolve axisprompt,turnOrthoon,anddrawtherevolveaxislineasillustrated.
5. IntheStart angle...prompt,clicktheFullCircleoption.
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