美国人的汽车画法(1)

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1、外国人的汽车画法DrawingEllipsesAnatomyofanellipse:Whenweviewacircleatanangleweseeanellipse.Werefertothisviewingangleasthedegreeoftheellipse.Aperfectcircleisviewedat90degreesandatangleslessthanthatweseevariousdegreeellipsesonthewaydowntoazerodegreeellipse(astraightline).Un

2、derstandingthemechanicsofdrawingellipsesisnotdifficult,masteringthedrawingofellipsesis.Anellipsehastwoaxesweneedtoknowabout,theminoraxisandthemajoraxis.Theminoraxisdividestheellipseintotwoequalhalvesacrossitsnarrowdimension.Themajoraxisdividestheellipseacrossitslo

3、ngdimensionintotwoequalhalves.Theminorandmajoraxescrosseachotherata90degreeangle.Seedrawinge-1.Ifwelookatthedrawingine-2wecanseethatIhavedrawnasquarearoundourellipse.AfterIdrawthesquareIdrawan“X”acrossittofinditscenterinperspective.Whenyouobservetheminorandmajorax

4、esoftheellipseweseethattheminoraxisgoesthroughthecenterofthesquarewhilethemajoraxisdoesnot.Wealsoobservethattheellipsetouchestangentexactlyinthemiddleofeachsideofthesquare,exactlywherewewouldexpectitto.Thisisabitofamindbender.Wehavetakenasymmetricalshape,theellips

5、e,anddroppeditintoperspective.Thisalwaysworksifyoudoyourdrawingwithintheallowablelimitsofdistortion.Regardlessofwhetheryourellipseisrollingonthegroundorrestingonit,asweseeindrawinge-3,theconstructionresultremainsthesame.Learningfromthisobservationandnowknowingwher

6、etheminorandmajoraxesofourellipseshouldbeisthesinglegreatesthelpindrawingellipsesproperly.Sincetheellipseminoraxisalwaysgoesthroughthecenterofoursquarethisissomethingwecanusetohelpusdrawit.Converselythemajoraxisreferencesnothingthatcanhelpusinlocatingitinourperspe

7、ctivesquare.ThisiswhyIdonotrecommendusingthemajoraxiswhendrawingellipses.Practicedrawingellipseswithoutworryingaboutlocatingtheminperspective.Hereareafewexamplesofmyrustyarmtryingtodrawsomeellipsesforthistutorialthismorning.Drawvarioussizesanddifferingdegrees.Afte

8、ryoudrawtheellipseidentifyitsminoraxisbydrawingalineacrossitsnarrowdimensionthatdivideseachsideequally.findithelpfulifyouimaginethatyouaregoingtofoldyou