Form vs. Shape 1€¦ · Form vs. Shape 1 Index A Align with Surface 32 B Blend 34, 71 BlendSrf 54,...

Form vs. Shape 1James Carruthers

Rhinoceros®NURBS modeling for Windows

Advanced 3D Modeling with 4th Edition

James Carruthers Industrial Design 3D Consulting Rhinoceros Sales and Training www.hydraulicdesign.net

©2007 Hydraulic DesignRhinoceros is a registered trademark of Robert McNeel & Associates

James Carruthers Industrial Design 3D Consulting Rhinoceros Sales and Training www.hydraulicdesign.net

Form vs. Shape 1

ContentsIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Basic Shapes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Logo Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Tunnel Edges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Tunnel Surface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Tunnel Alternate Patch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Tunnel Alternate Sweep1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Tunnel Alternate Sweep2 NetworkSrf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Tunnel Alternate Point Editing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Refining Brim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Finishing Outer Shell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Shelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

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Form vs. Shape 1

IntroductionIntroductionIntroductionIntroduction

The main theme of this tutorial is how there aremultiple solutions to any modeling challenge youmight encounter and evaluating the suitability ofdifferent approaches depending on the purposeof the model. Different techniques might beused when modeling for manufacturing asopposed to illustration, and different techniquesare more commonly used when ‘Designing’ asopposed to ‘modeling.’ There’s more than oneway to skin a hat.This is an ‘advanced’ tutorial. It is intended to beeasy to follow, but the emphasis here is on whatNURBS and Rhinoceros can do, not necessarilyhow to execute every command prompt-by-prompt. The Evaluation version of Rhino includesa number of basic tutorials to help you getstarted. Commands are referred to by the nameused for typed entry and are HighlightedHighlightedHighlightedHighlighted .


Form vs. Shape 1


Form vs. Shape 1

Shell

Logo Panel

Brim

Tunnel

(0,-1,0)


Form vs. Shape 1

(-3.5,1.0) (6.0,1.0) (11.0,1.0)

(-12.5,-1.5).

(-4.0,-0.5) (3.7,-0.5)

(11.6,-1.9)

(-12.3,-2.2).


Form vs. Shape 1

(-1,2)


Form vs. Shape 1

(-9.2,2.3)

(-9.6,-0.9)

(-8.2,5.2)


Form vs. Shape 1

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Form vs. Shape 1

(3.3,2.0)

(3.4,-1.0)

(2.5,5.0)(0,5.0)

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Form vs. Shape 1

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Form vs. Shape 1


Form vs. Shape 1

(2.0,0.0)(2.0,-1.0)

(2.0,10.0)

(2.0,-5.2)

(3.8,-8.0)


Form vs. Shape 1

End Snap

(-6.8,6.6)

(-3.7, 8.5)(1.55,8.83)

(6.4,7.0)

(9.16,3.6)

(9.2,0.4)


Form vs. Shape 1


Form vs. Shape 1

End Snap

End Snap

End Snap

(3.53,-8.08)

End Snap


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(1.25,Y aligned withfirst point)

End Snap

End Snap


Form vs. Shape 1


Form vs. Shape 1

(-8,5,7.5)

(-5.0,3.0)

Int snap

Int snap

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Form vs. Shape 1

RailSurface EdgeMatch Tangency

RailSurfaceEdge

SectionCurve


Form vs. Shape 1

RailSurface EdgeMatch Curvature

RailSurfaceEdge

SurfaceEdgePositionMatch

Surface EdgeCurvature Match

Curve

Surface EdgePosition Match

SectionCurve

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Form vs. Shape 1


Form vs. Shape 1

RailSurface EdgeMatch Curvature

SectionSurfaceEdge

SectionSurfaceEdge

RailCurve


Form vs. Shape 1


Form vs. Shape 1

SurfaceEdgePositionMatch


Curve

Surface EdgePosition Match


Form vs. Shape 1


Form vs. Shape 1

This is might be the first solution that wouldcome to mind when considering this problem.While this may look like a good start, it’s notreally very promising considering what we ‘want’to do. If we compare the tunnel edge curve tothe intersection of the sweep with the shell(curvemade with IntersectIntersectIntersectIntersect ,) it's not really close.It would be possible to add more section curvesto the sweep and/or point-edit to get closer butit would take a lot of work.

14141414.... Build a Sweep1 along the side profilesurface. It doesn't affect the surface much, butuse the AlignAlignAlignAlign withwithwithwith SurfaceSurfaceSurfaceSurface option.

The plan to sidestep the 5-sided surface issue inthis case would be to edit the surface--I justnudged a couple points here--so that it getstrimmed off by the the brim. That's great, butagain it does not lend itself to precisely aligningwith our 'critical' features.

RailSurface Edge

SectionSurfaceEdge

SectionCurve


Form vs. Shape 1


Form vs. Shape 1

(2.78,209)


Form vs. Shape 1


Form vs. Shape 1

End Snap

RailSurface EdgeMatch Tangency

RailCurve

SectionCurve

SectionSurfaceEdge


Form vs. Shape 1

SurfaceEdge


Curve

SurfaceEdge


Form vs. Shape 1


Form vs. Shape 1

Section SurfaceEdge

Rail SurfaceEdge


Form vs. Shape 1

(-1.0,9.0)

Point Snap


Form vs. Shape 1


Form vs. Shape 1

Curve

Surface EdgeMatch Tangency

Curve

Surface EdgeMatch Tangency


Form vs. Shape 1

(-12.24,-2.0)

(-10.34,-0.69)

(-11.61,-1.23)(-11.77,-1.32)

(-12.06,-2.0)(-11.85,-1.75)

(-8.45,-0.01)

(-12.24,-2.11) (-12.05,-2.14)

(-11.85,-2.0)(-11.85,-2.14)

(-11.85,-1.44)


Form vs. Shape 1

End Snap

(10.24,-1.58)End point

(9.74,1.03)(9.90,0.96)

(8.38,1.19)

(5.99,1.45)

(9.98,0.82)

(9.98,-0.39)


Form vs. Shape 1

RailCurves

SectionCurve

SectionCurve


Form vs. Shape 1


Form vs. Shape 1

G1Continuity

G2 Continuity


Form vs. Shape 1


Form vs. Shape 1

Point snap

Point snap

(w0,-11.65,-1.53)

(w6.768,2.5,0.64)


Form vs. Shape 1


Form vs. Shape 1

End Snap

End Snap


Form vs. Shape 1


Form vs. Shape 1

End SnapEnd Snap


Form vs. Shape 1


Form vs. Shape 1

IndexA

Align with Surface 32

B

Blend 34, 71

BlendSrf 54, 59, 73

Boolean2Objects 55

brim 5

C

ChangeDegree 8

CrvDeviation 46

Curve 6, 8, 10, 13, 14, 16, 48

CutPlane 11

D

design intent 18

Dir 55

DocumentProperties 2

DupEdge 34, 50, 52

E

Ellipsoid 5

Emap 22

Explode 30

ExtendSrf 53, 68, 73

ExtractIsocurve 23

ExtractSrf 27

ExtrudeCrv 8, 14

ExtrudeCrvTapered 59

ExtrudeCrvToPoint 7

F

FilletEdge 56

freeform editing 44

G

G1 continuity 59, 73

G2 contunity 54, 59

grid options 3

I

InPlace 30

Intersect 32, 46, 67

Int snap 19

iterative 51

J

Join 7, 10, 26, 35, 36, 52, 66, 72, 74, 75, 76

L

Line 16, 19, 62

Logo Panel 8

logo panel 5

M

Maintain Height 50

MatchSrf 43

MergeEdge 27, 31, 40

mesh options 3

Mirror 10, 15, 26, 49, 53, 54

modeling aids 4

Move 49

N

Near snap 24

NetworkSrf 21, 22, 25, 37, 39, 47, 75

nudging 4, 9

O

OffsetSrf 57

Options 55

Ortho Osnap 17

P

Patch 28

Pipe 53, 67

Planar Osnap 16

Plane 11

Project 13, 62, 64

S

shell 5, 57

ShowEdges 15

Split 11, 42, 54, 58, 61, 68, 69, 71

SplitEdge 19, 20, 36, 39

Sweep1 32, 41

Sweep2 20, 21, 36, 39, 50, 65

symmetric objects 51

T

Tapered 59

tolerance 2, 64

ToPoint 7

Trim 6, 7, 10, 15, 16, 31, 72, 74

tunnel 5

Tunnel Edges 13

U

units 2

UnTrim 30, 31, 70

W

WebBrowser 4

Z

Zebra 22

Form vs. Shape 1€¦ · Form vs. Shape 1 Index A Align with Surface 32 B Blend 34, 71 BlendSrf 54,...

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