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Rhino Basics Course Rhinoceros NURBS modeling for Windows

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• Polygons • Polygon Meshes

• NURBS • Curves • Surfaces • Solids

Geometry

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Polygon Meshes Polygonal Modeling Software

• SketchUp • 3DS Max • Maya • ...

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• Defined by vertices • Edges are straight lines • Faces are planar

Polygonal Meshes

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Polygon Meshes Differences with NURBS

Mesh sphere NURBS sphere

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• Curves are defined by a start, an end and weights in between

• Position of the weights affect the curvature

• Number of weights define degree of a curve

Pioneers: Paul Bézier (Renault) and

Paul de Casteljau (Citroën)

Non-Uniform Rational Basis Spline NURBS

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• Defined by crosswise curves • Curves defining the surface are called isoparms • Control points are the weights of the isoparms

The surface NURBS

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• Crosswise isoparms define the surface • It’s always a rectangular surface

Surfaces NURBS

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• Forms based on primitives • Joined (trimmed) surfaces

Solids NURBS

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Trimmed surfaces NURBS

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• Rhino • Maya • ... • Other CAD/CAM/CAE software

NURBS modeling software NURBS

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User interface Rhino

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• Download needed files from adhok.bk.tudelft.nl/site/rhino

Basics Rhino

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• Follow tutorial on TOI-Pedia wiki.bk.tudelft.nl/toi-pedia Browse by Software > Rhino Tutorials > Creating 2D Objects

Creating 2D Objects Rhino

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• Follow tutorial on TOI-Pedia wiki.bk.tudelft.nl/toi-pedia Browse by Software > Rhino Tutorials > Creating 3D Objects

Creating 3D Objects Rhino

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• Follow tutorial on TOI-Pedia wiki.bk.tudelft.nl/toi-pedia Browse by Software > Rhino Tutorials > Modeling a detail of Centre Pompidou (NURBS)

Creating 3D Objects Rhino

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• You may continue to make a head start and finish the detail similar to the photo

Creating 3D Objects Rhino

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• Make your model watertight • Convert file to STL (Stereo Lithography) • Open STL file • Check direction of faces (normals)

• Unify normals • Check for naked edges

• Match mesh edges • Fill holes

Basic checks 3D Printing Rhino

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• Free plugin for parametric modelling • Available at www.grasshopper3d.com

Grasshopper Rhino