Basic Jewelry Modeling in Rhino.pdf

Basic Jewelry Modeling

in Rhino ceros ®

BASIC JEWELRY MODELING IN RHINO CEROS

Rhino ceros is a registered trademark of Robert McNeel & Associates.

Revised 10 February 2005.

Tutorials provided by:

Alex Antich, TechJewel

Giuseppe Massoni, Massoni Design

BASIC JEWELRY MODELING IN RHINO CEROS

Table of Contents

1 Create a Ring with a Concave Top Surface .................................................5

Starting a Model with a Template .................................................................. 5

Modeling the Shank Outline .......................................................................... 6

Creating the Inside Shank Curve ................................................................. 10

Extruding Curves to Create the Solid Ring..................................................... 13

Cutting Out the Shank ............................................................................... 14

2 Create a Ring with Decorative Top Elements ...........................................16

Modeling the Shank................................................................................... 16

Creating the Inside Curve........................................................................... 24

Extruding Curves to Create the Solid Ring..................................................... 26

Cutting Out the Shank ............................................................................... 28

3 Create a Simple Band Ring.......................................................................29

Modeling the Shank Inner Curve ................................................................. 29

Creating the Shank Cross-Section Profile ...................................................... 31

4 Create an Eternity Ring with Claw Settings..............................................36

Modeling the Shank................................................................................... 36

Create the Claw to Array ............................................................................ 37

Create a construction circle for the outside of the shank ............................ 37

Create construction lines ...................................................................... 38

Arraying the Claw Profile Around the Ring ............................................... 42

Extruding the Curves to Create the Solid Ring ............................................... 42

Creating the Channel ................................................................................. 43

Cut the Channel........................................................................................ 45

5 Create a Ring with Gemstones .................................................................47

Draw the Initial Shank Outline Shape........................................................... 47

Adding Gemstones .................................................................................... 49

Importing a gemstone model ................................................................ 49

Place another gemstone ....................................................................... 50

Place the third gemstone ...................................................................... 51

Making the Finished Shank Curves............................................................... 53

Making the Interior Opening ....................................................................... 54

Edit the interior curve's shape ............................................................... 55

Making the Curves that Define the Exterior Shape.......................................... 58

Making the Exterior Surfaces ...................................................................... 62

Making the Interior Surface ........................................................................ 63

Making the Front and Back Surfaces ............................................................ 64

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BASIC JEWELRY MODELING IN RHINO CEROS

Making a Solid to Cut the Opening in the Top Surface..................................... 65

Cut the Opening in the Top Surface ............................................................. 66

BASIC JEWELRY MODELING IN RHINO CEROS

1 Create a Ring with a Concave Top Surface

In this tutorial, you will learn how to make a

ring with a concave top surface.

You will learn how to:

• Use grid snap and object snaps

• Use layers

• Make circles and arcs to define the shape

of the ring

• Extend arcs

• Join the arc segments into a single

polycurve

• Offset a polycurve to make a second

polycurve

• Turn on and move control points

• Extrude the 2-D curves to make solids

• Use zoom commands to change the view

• Use the BooleanDifference command to hollow the ring's interior

Starting a Model with a Template

When starting a model in Rhino you can select a template to begin the modeling

process. Templates contain information that helps you get started such as units,

layers, viewport layouts, and toolbars.

Selecting a default template sets the units for your model. For these examples, we

will be using millimeters as our units.

The templates include six predefined layers . Layers are a way of organizing objects so

you can manipulate them separately or keep track of them in some way. It may help

you to think of layers as transparent sheets where you can place different parts of

your model. The predefined layers have color properties that will let you distinguish

various parts more easily.

Modeling aids can help you draw the 2-D geometry with more precision. In this

tutorial you will use the snap and object snap (osnap) modeling aids. You can find

the controls for modeling aids on the status bar at the bottom of the Rhino window.

When Snap is on, the marker "snaps" between grid snap points. In this template, the

grid snap is set at one-millimeter intervals to match the grid line intersections.

Object snaps make it easy to snap precisely to various parts of the geometry. In this

tutorial, we will use the End object snap to attach geometry at the end of another

piece of geometry.

Note Object snaps are crucial to accurate modeling. Never try to place things

visually on the screen; it is too difficult, and it is impossible to ensure

accuracy.

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