第二课 相机前壳分叉面

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1、第二課相機前殼分叉面(crotchedsurfaces)【L2_0】1.《OpenFile》:camera_L2.wire.2.MaketheBackSurfslayerinvisible.Step1:Definingmodificationarea1.《Untrim》the“Fronttop”surface.2.DeleteallCrvOnSrfofthe“Fronttop”surface.3.Setthesurface’s《Patch》to“a4”.【L2_s1-3】4.Use《ProjectNormal》toprojecttwopatcheslineontothes

2、urface.【L2_s1-4】Step2:Creatingnewboundarycurves1.《NewCurve(editpts)》[KnotSpacing:Uniform;CurveDegree:3]2.Drawacurveanddragit’sendstospecificposition.【L2_s2-2】3.《Trim》thesurfaceand“discard”theleft-frontarea.【L2_s2-3】4.Drawanothercurve.【L2_s2-4】【L2_s2-2】【L2_s2-3】【L2_s2-4】Step3:Adjustingcur

3、ves1.SelectboththelastCVsofthetwocurvesandmovethemto“r0,0,-4.【L2_s3-1】2.Selectboththe3edCVsofthetwocurvesandmovethemto“r0,0,-1”.【L2_s3-2】3.Set《ProjectTangent》tothestartendoftheshortcurvewiththe“Fronttop”surface.【L2_s3-3】【L2_s3-1】【L2_s3-2】【L2_s3-3】Step4:Creatinganewsurface1.《Untrim》the“Fro

4、nttop”surface.2.《Square》[Boundary1Continuity:Tangent].【L2_s4-2】3.Deletethosetwocurves.4.Setthe“Fronttop”surface’s《Patch》to“a2”andmakeittemplate.【L2_s4-4】Step5:Adjustingtheshapeofthenewsurface1.《Insert》two“isoparams”tothenewsurfaceatU0.75andU0.62(byusinghot-key“Alt”tosnaptotheposition).【L2

5、_s5-1】2.DisplayCVsandHulls.【L2_s5-2】3.Pickthelasthullandmoveitto“r0,0,-3”【L2_s5-3】【L2_s5-1】【L2_s5-2】【L2_s5-3】(Step5:Adjustingtheshapeofthenewsurface)4.Picknothing.Then,pickthehullnexttothelasthullandmoveitto“r0,0,-1.5”.【L2_s5-4】5.《Extend》rightboundary5mm.【L2_s5-5】6.HideCVsandHulls.Step6:R

6、e-intersectingandtrimmingsurfaces1.Togglethe“Fronttop”surfacefromtemplatetopickableandremovethosetwoCrvOnSrfs.2.《Untrim》the“Frontright”,“Frontfaçade”and“Fronthandle”surfaces.【L2_s6-2】3.Select3CrvOnSrfsanddeletethem.【L2_s6-3】4.Fromtopview,《project》newsurface’sboundarytothe“Fronttop”surfac

7、e.【L2_s6-4】【L2_s6-2】【L2_s6-3】【L2_s6-4】(Step6:Re-intersectingandtrimmingsurfaces)5.《Intersect》”Fronttop”with“Frontfacade”and“Frontright”.【L2_s6-5】6.《Trim》”Fronttop”and“Frontright”.【L2_s6-6】7.《Intersect》”Fronthandle”with“Fronttop”andthenewsurface.【L2_s6-7】【L2_s6-5】【L2