catia imagine and shape v5r17

7/30/2019 CATIA Imagine and Shape V5R17

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Copyright DASSAULT SYSTEMES 1

CopyrightDASSAULTSYSTEMES

Imagine and Shape

CATIA TrainingFoils

Version 5 Release 17September 2006

EDU_CAT_EN_IMA_FI_V5R17


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CATIA Imagine and Shape

Objectives of the courseUpon completion of this course you will be able to:

- Identify and use the tools specific to the Imagine and Shape workbench

- Create new product shapes

- Improve their styles

- Modify those using Shape Design tools

Targeted audienceProduct Stylists, Industrial Designers

PrerequisitesStudents attending this course should be familiar with the CATIA GenerativeShape Design

1 day


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Table of Contents (1/3)

Introduction to CATIA Imagine and Shape 6

Overview of Imagine and Shape Workbench 7

Accessing the Workbench 12

Imagine and Shape: User Interface 13

Imagine and Shape: Recommended Settings 19

Imagine and Shape Common Tools 22

Curve Modeling 32

Curve Creation 33

Curve Deformation 36

Surface Modeling 47

Creating Basic Surfaces 48

Manipulating Surfaces 52

Modifying the Topology 63

Recap Exercise: Creating Basic Shapes 78

Operations 79

IMA Operations 80

Shape Operations 95

Imagine and Shape Recommendations 97


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General Methodology 98

Settings Management 105

Size Management 107

Tree Structure Management 108

Quality Management 112

Methods to Obtain Nice Shapes 116

Master Exercise 1: Perfume Bottle 117

Master Exercise Presentation: Perfume Bottle 118

Master Exercise Step (1): Creating the Main Shape 119

Master Exercise Step (2): Splitting the Shape 120

Master Exercise Step (3): Creating the Nozzle 121

Master Exercise Step (4): Finishing the Perfume Bottle 122

Added Exercise 1: Hair Dryer 123

Added Exercise Presentation: Hair Dryer 124

Added Exercise Step (1): Creating the Main Shape 125

Added Exercise Step (2): Creating the Nozzle 126

Added Exercise Step (3): Creating the Top Shape 127

Added Exercise Step (4): Creating the Handle 128


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Added Exercise Step (5): Creating the Buttons 129

Added Exercise Step (6): Creating the Wire 130

Added Exercise 2: Video Projector 131

Added Exercise Presentation: Video Projector 132

Added Exercise Step (1): Creating the Main Shape 133

Added Exercise Step (2): Creating the First Part of Lens 134

Added Exercise Step (3): Creating Second Part of Lens 135

Added Exercise Step (4): Creating the Button 136

Added Exercise Step (5): Splitting the Shape 137

Added Exercise Step (6): Finishing the Video Projector 138

More Exercises for Practice 139


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Introduction to CATIA Imagine and Shape

Overview of Imagine and Shape Workbench

Accessing the WorkbenchImagine and Shape: User Interface

Imagine and Shape: Recommended Settings

Imagine and Shape Common Tools


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Overview of Imagine and ShapeYou will get an overview of CATIA Imagine and Shape workbench.


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Overview

CATIA Imagine and Shape is used in product conception stage. The basic principlebehind this workbench is to start with a very simple shape, a closed or a planar one andreach the idea you have in mind by manipulating and refining the mesh of this shape(rotation, translation, scaling, subdivision). You can also use GS1/GSD operators tocombine the surfaces and finalize the shape.

Surfaces created in Imagine and shape workbench are based on Subdivision Surfacetheory.


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Introduction to Subdivision Surfaces

Catmull-Clark subdivision surface

Doo-Sabin subdivision surface

Origin of subdivision surfaces goes back to 1978 when Catmull and Clark, and Dooand Sabin first proposed to generalize bi-cubic and bi-quadratic patches methods tomeshes of arbitrary topology.


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What is a Subdivision Surface

Subdivision algorithms are exceptionally simple, work for arbitrary control meshes andproduce globally smooth surfaces. Special choices of subdivision rules allow for theintroduction of features into a surface in a simple way.

Subdivision-based representations of complex geometry can be manipulated andrendered very efficiently, which makes subdivision a highly suitable tool for interactive

animation and modeling systems.

Subdivision is an algorithmic technique to generate a smooth surface as a sequenceof successively refined polyhedral meshes.


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Subdivision Surfaces in Imagine & Shape

Control Mesh

4 sides face of the mesh

The subdivision surfaces in CATIA V5IMA are exact surfaces (Bezier orNURBS and not a polygonalapproximation) computed to reach anaesthetical shape.

A subdivision surface can be seen as askin made of elementary surface, it canbe close or open.

The topology of the shape is arbitrary,it enables then the description of alarge variety of complex topologies.

The definition and the control of theshape is made using a mesh. Thismesh is made of 4-sides faces.

Some mesh attributes can be added tocontrol the local attraction of thesurface and so obtain sharp or smoothedges in a single surfaces.


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Accessing the Workbench

Click "Start / Shape / Imagine & Shape"


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Imagine and Shape: User Interface (1/6)

Imagine andShape Tools

Subdivision Surfaces

Modification Tools Pallete

Compass

Geometry created in IMAappears under GeometricalSet in Specification Tree

Contextual Display

Shape Operation


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Contextual helpAt any time, an information text linked to themouse cursor is displayed. This simplyinforms you on the current function.

The contextual display can be turned on andoff using this icon.Three levels are available:

First level: no display Second level: Manipulation/Translation Third level: display all information

ToolbarsAll the functions have associated anddedicated toolbars to access options.No dialog panels are then displayed, savingscreen spaces.

Option keysThe shift and control keys are intensivelyuseable to manage selection and actionsThe contextual help give you a clear messageon the active keys and their actions.

Remote controlThe mouse cursor has not to be onto anelement or very close to interact.This gives you a real productivity gain and avery fast interaction with elements andhandles.


General behavior:

Controlling the shape of the curvekeeping the cursor away from the curve.


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NameToolbar

Curve creation

Open surfacecreation

Closed surfacecreation

Face Cutting

Face Subdivision

Face Erasing

Modification ofcurve/ surface

Icon

Creation

StylingSurfaces

Extrusion of faces/ face addition

Sections Number

Modification

IMA workbenchWorkbench

SelectionSelect/ SelectionTrap

Help TextText Help Level


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NameToolbar

Working ZoneDefinition

Extract

Trim

Split

Icon

Link curve tosurface

Operations

Alignment of vertex

Symmetry

ShapeOperations

Boundary

Join

Shape Fillet

Edge fillet

Variable Fillet

Offset


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NameToolbar

Intersection

Extract

Trim

Split

Icon

Revolve

Extrude

ShapeOperations(Continued)

Blend

Update All

Manual UpdateMode

View ModificationF2

View Selection F4

Update

ViewManagement Note: All commands inIMA are available by

shortcuts.


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NameToolbar

Compass Definition

Rotation

Affinity

Attraction

Icon

Translation

Reset Compass

Tools Palette(ForModification)

Local normals

Pick

Data Definition

Attenuation

All Type Selection

Select All

Edge Selection

Face Selection

Vertex Selection


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Imagine and Shape: Recommended Settings (1/3)

Update propagation: This option allows to define the level of children to be updated when working inManual update mode.

Attenuation: This option lets you define the ratio between the mouse displacement and the actualdisplacement of the manipulator. This option is important to control the mesh with a better accuracy .

Automatic Weight on vertex: Weight is automatically applied on vertex when there is at least threeconnex edges. This option is checked by default.

1

2

3

1

2

3

4

Without Automatic

Weight option

With Automatic Weight option

Primitive creation center mode: This option lets you decide the center of gravity of a premitive to be at the

center of the screen or at origin of a part.4


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These options let you define thegraphic properties for curves.

This option lets you definethe color of surfaces.

These options let you define thegraphic properties for base meshes.


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To get a nice look of the environment, set the following:

Set the Thickness of type 2 lines to 1 (instead of 2)

Under Visualization tab set the Anti-aliasing ON.

Enable 'Proportional' option and set to "0.1" to maximize dynamic display performance.


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Imagine and Shape Common ToolsYou will learn about the tools, which you can access on the fly while creatingand manipulating the surfaces.


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Selection Tools (1/3)

In most functions, the modification Tools Palette contains a set of icons dedicated tomesh selection.

Using one of the selection icons enables a filter mode to only select specifiedmesh elements.

NameToolbar

All Type Selection

Select All

Icon

Edge Selection

Face Selection

Tools Palette(For

Modification)

Vertex Selection


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Use the shift key to perform a trap selection

Press the shift key

Draw the trap

Release the shift key

Use the control key to add or remove the selection

An unselected element is added to the selection

A selected element is removed to the selection

Use the combination of shift and control key to add orremove a trap selection

Use a single click to select the element (moving themouse as close as necessary to highlight the element).



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Use Propagation icon topropagate edges selection.

When you select an edge, you can propagate the selected edge.

With propagation option a set of

connected edges is selected

Without propagation option

only one edge is selected.

The manipulator allowsyou to select two differentsets of connected edges.

Same edge selected but withdifferent mouse pointer position.


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Change the main plane between one of thethree of the compass axis

In several functions, the contextual toolbar containsa set of icons dedicated to manage the compass

Use the dedicated icon to modify the origin and theorientation of the compass

The toolbar contains a set of dedicated options:

Compass Definition (1/5)

NameToolbar

Exit the compass definition and returnto previous function

Rotation

Icon

Reset compass orientation to themodel axis

Tools Palette(For Compassdefinition)

Translation

Pick 3D element


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The compass is defined depending on the selected element:

Generally, the compass plane (x and y axis) is defined using a meanplane computation of the selected elements

Selecting a face

Align the compass X-Y plane on the mean plane of the face

Selecting an edge

Align the Z axis of the compass along the edge direction

Selecting a point

Define the compass origin

Any combination is possible


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Defining the compass using vertices:

The compass origin The Z axis The X and Y axis (the previous Zaxis is replaced by X axis)

The compass origin is locked using a single click on a vertex and is not modified if youadd elements to the selection. To free its position, use the second icon on the toolbar

Selecting successively three vertices defines:

The compass origin

The Z axis

The X and Y axis


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Selecting an edge defines the Z axis.

Defining the compass using edges:

You can also select a set of elements using multi selection (controlkey or trap using shift key).

Selecting successively two edges defines:

The Z axis

The X and Y axis (the previous Z axis isreplaced by X axis)


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Use the third icon to switch the compass axis

X change to Y, Y to Z and Z to X

To freely define the compass, use one of the following icons to performtranslation and rotation.

Use the icon to exit the compass definition


Use the last icon to pick 3D element in 3Darea. Compass aligns to this element.


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Views management (It allows to quickly change the view orientation)

Press F4 key on the keyboard

Move the mousse pointer around your model

A green pyramid appears

Select the desired view

Perspective / conical view management (Shortcut =F2)Press F2 key on the keyboardSelect Parallel or Perspective viewFor Perspective view option you can define interactively the focal angle (Default 15)

Managing the Views

Use F4 key + Shift-trap + Ctrl for better productivity in edge/vertex/plane selection


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Curve Modeling

You will learn how to create and deform the surfaces. Also, you will learn howto link a curve to a surface.

Curve Creation

Curve Deformation


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Curve CreationYou will learn how to create the curves in Imagine and Shape workbench.


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A powerful curve modeler based on an aesthetical approach supports thesubdivision surfaces technology

This new modeler provides users with a natural and intuitive way of drawingand controlling a complex curve

These curves can be created, a posteriori, in the model

The subdivision surfaces can be then controlled by curves for globaldeformation

The connections between curves are G3.

What About Curve Creation


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How to Create a Curve

Curve sketching

Created Curve

Use the dedicated Sketch Curve icon to create a newcurve.

A tools palette is displayed allowing you to specify adrawing plane. Use Plane Selection icon and select

an existing plane if you want to create a curve lying to.

If you dont specify any plane, the curve will be createdonto the view plane.

To create a curve, use the mouse to sketch or use apen palette if you can (better feeling).

Click and keep pressed the left mouse button, describeyour sketch and release the mouse button. During themouse manipulation, a graphic display shows you atemporary curve, this curve will be smoothed to createthe final one at the mouse release

As soon as you release the mouse button, the curve is

created.

The tools palette contains then additional options (seeCurve Manipulation section)

You can then continue to sketch to refine the curve


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Curve DeformationYou will learn how to deform the existing curves.


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The interaction is based on natural drawing and direct manipulation

The remote control operates in a same way than surface modification (the entirescreen is active)

Toolbar description:

What About Curve Deformation

Name

Fillet definition

Erase

Planar constraint

Transformations

Icon

Area Selection

Characteristics

Curve sketching

Direct deformation

Smoothing


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The Curve sketching option allows you to draw and refine curve in a same waydrawing with a pen and paper.Use a pen tablet to better control the drawing.

You can iterate drawing as many sketches as you want, the curve being recomputed

and updated taking into account your drawings.

Redefining a Curve by Sketching


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Select the curve to modify

Press and keep pressed the left mouse button

Move the mouse to reach the desired curve.

Release the mouse button.

If the curve plane option is activated the manipulation is allowed only in theplane where the curve has been created

If the curve plane option is not activated the manipulation is allowed in allthe directions

Manipulating the Points

The Manipulate a point option allows you to manipulate the curve.


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Select the curve to smooth

Click anywhere to smooth the curve

The more you click the more the curve is smoothed

To smooth only a portion of the curve, press the Ctrl key and select the portionto be smooth

Smooth the portion as explain above

Smoothing a Curve

Portion to be smooth

The Smoothing option allows you to smooth a curve


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Manipulator

Filleting a Curve (1/2)

The Fillet option allows you to smooth an area an better control locally the shape

Select the curve

Select the Fillet option

Press and keep pressed the left mousebutton

Move the mouse along the curve toselect the area where you want to applythe Fillet

Release the mouse button

Drag the manipulator along the greencurve to define the Fillet

Portion to be smooth


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Filleting a Curve (2/2)

Portion to be smooth Manipulator

Control Point

The Fillet option allows you also to better control the curveIf the modification area includes an extremity of the curve, the handle allows themanipulation of the position of this limit and the orientation of the tangent


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Erasing a Curve

The Erase option allows you to erase a portion of the curve

Select the curve

Select the Erase option

Press and keep pressed the left mouse

buttonMove the mouse along the curve toselect the area to erase

Release the mouse button

Special case:

Erasing an inner portion of the curve removesthe details and create a nice shape

2 31

Removing the extremity of a curve

Removing the internal part of a curve

we need to make it a jobaid


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Defining Curve Characteristics

The Curve Characteristics option allows you to displayand modify curve characteristics.

Select the curve

Select the Curve Characteristics icon

Change the value of Order field. (The more order, thetighter the curve)

Check Arc Number and change the value to modify themaximum number of arcs

Check View Limits to display the limit arcs in 3D area


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Curve Transformations

The Curve Transformation option allows you to accesstransformation icons while modifying a curve.

Select the curve

Select the Transformation icon

Tools Palette containing transformation icon isdisplayed

See CompassDefinition session

See ManipulatingSurface session


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Deforming a Curve in 3D Space

To deform the curve in 3D space deactivate the option Curve Planarity.

Curve Planarity option is ON by default .

Unselect the option to work in the 3 D space.


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Surface Modeling

You will learn how to create and modify the subdivision surfaces.

Creating Basic Surfaces

Manipulating SurfacesModifying the Topology

Recap Exercise: Creating Basic Shapes


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Creating Basic SurfacesYou will learn what are the basic surfaces and how to create them usingImagine and Shape tools.


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What About Basic Surfaces

Creating open surfaces

Creating a Circular Surface

Creating a Triangular Surface

Creating a Ring-Shaped Surface

You have also the possibility to create those kind of shapes:

Creating Closed surfaces

Creating a Cylinder

Creating a Box

Creating a Pyramid

Creating a Taurus


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Use one of the two dedicated icons to create a first surface.

Open surfacesClosed surfaces

Surfaces are created using the current viewpoint information:It can be at the center of the screen or at the origin of thepart, depending on the CATIA settings.

View Centered: Creates surface at the center of screen Origin Centered: Creates surface at the origin of the

part

The size is a ratio of the window size (independent of thezoom factor)

The size of the mesh is equal to of the screen size Ex: if you have a 16 screen the size of the mesh is 4 Note: to manage accurately the size of the surface refer

to Scaling section

The model axis orientation is used to define the surfaces.The mesh is aligned along the model axis.

Open surfaces are created onto the plane which is the mostparallel to the screen.

How to Create Surfaces (1/2)


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Sections Number icon can be used to add sections to makecircular primitives (open and closed) close to real circle.

You can apply this effect on Sphere, cylinder, Torus andCircle.This option is OFF, by defaultClick this option to enable it

The modification function is automatically launched after thecreation and the entire mesh is selected (allows to quicklyposition or scale the element).

How to Create Surfaces (2/2)


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Manipulating SurfacesYou will learn what are surface manipulation functions and how to manipulatethe surfaces.


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Through the compass, handles are remotely highlightedshowing the allowed manipulations. You dont have to beonto the handle to manipulate it.

The handle origin is by default positioned at the middle pointof the selected elements. To specify an other location use theCompass Definition option if needed.

During the manipulation, the surface is roughly pre-visualized.

The impacted area is displayed in orange color.

The surface is exactly computed at mouse release.

What About Surface Manipulation

Manipulation functions enable you to control the mesh that drives the surface.


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To perform the translation:

Move the mouse to highlight the desired axisor plane (no need to be on the element)Click and keep pressed the left mouse buttonMove the mouse to translate the elementsRelease the mouse button

To move selected elements, select the Translation icon. The icon is displayed as shown.

Applying Translation (1/3)

You can perform translations along 3 directions or onto 3 planes (defined by thedirections), depending on the mouse cursor position


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You can translate the selected elements by desired value using Data Definition icon.

Three options are available for translation using Data Definition.


Selected elements for Translation

Translated Compass

Compass get translated and selectedelement are aligned on compass plane

Compass at the Origin

Compass along with the selected elementsget translated.

Aligned Coordinates

Compass along with selected elements get

translated to the origin of the surface.


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To have a better control during the translation,use Attenuation command

Option on

Option off


You can translate the selected elements with thehelp of 3D elements using Pick icon.

Select Pick icon.Select 3D element


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To perform the translation:

Select the elements, which can be vertices,edges or faces.Move the mouse to drag selected elementsalong their own local normals.Release the mouse button

To have a better control during the translation,use Attenuation command

Option on

Option off

To move along the normal to the selection, select the Local Normals icon. The icon is displayedas shown.

Applying Translation along Normals

You can perform translations along the normal to the selection, as if performing alocal offset.

Translation along Normal


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To perform the rotation:Move the mouse to highlight the desired rotation axisClick and keep pressed the left mouse buttonMove the mouse to rotate the elementsRelease the mouse button

A graphical display informs you on the angle value

During the manipulation, use the control key to enable 5step.

If needed, use the Compass Definition option to specify theorigin of the rotation and the orientation of axis (see thecorresponding section).

To have a better control during the translation, use Attenuationcommand

Option on

Option off

To rotate selected elements, select the Rotation icon. Theicon is displayed as shown

Applying Rotation

You can perform rotations around one of the three axis of the handle.


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To scale selected elements, select the Affinity icon. The icon is displayed as shown.

Scaling

You can perform scaling along one of the three axis, along two axis or a full 3D scaling.

To perform the scaling:Move the mouse to highlight the desired axis or planeClick and keep pressed the left mouse buttonMove the mouse to scale the elementsRelease the mouse button

Use the control key to perform a 3D scaling (along the threedirections):

Press the control keyClick and keep pressed the left mouse buttonMove the mouse to scale the elementsRelease the mouse button

If needed, use the Compass Definition option to specify theorigin of the scaling and the orientation of axis.

To have a better control during the translation, useAttenuation command


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Applying Weights (1/2)

Use the Attraction icon to modify weights

Use the selection filters to enable edges or vertex selectionand then modify their attributes.

The value of the weight is displayed on the bar.(valuebetween 0 and 100%).

To modify a weight value:

Select the elements to modify

Press and keep pressed the mouse button

Move the mouse to reach the desired value.

Release the mouse button.

If an edge or a vertex has a weight value, the look of those

one is different than others (the edge thickness is bigger,the line is not dotted, the vertex is a bigger circle).

Vertex weight modification

Edge weight modification


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Applying Weights (2/2)

The value of the weight is indicated with aminus sign for sharp edge.

Smooth connection

Sharp connection

When you select a surface or an edge two options are available:


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Defining Precise Parameters for Manipulation

When you manipulate vertices, edges or faces, you can precisely define parametersusing Data Definition icon. Displays a contextual panel enabling valuesspecifications.


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Modifying the TopologyYou will learn how to modify the topology of the subdivision surfaces.


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Use one of the four dedicated icons to modify the structure of thesurface.

A dedicated toolbar allows you to turn on or off the preview option.This option help you to visualize the possible created shape, this isdrawn when the mouse move and highlight an element and when

elements are selected.

What About Topology Modification

Preview ON Preview OFF


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The extrusion function creates faces depending on the selected element. Theoption toolbar helps you to specify the selection filter (face or edge)

Extruding a Face (1/7)

Preview Creation

A face selection creates an extrusion made of 5 faces, the extrusiondirection is the normal of the selected face

An edge selection operates only on border of open surfaces, it creates a singleface on a plane defined by the mean plane of the face connected to the edge.


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Use the control key to add selection

Use a trap (with shift key) to create extrusions on a set of elements

You can operate multi-selections to create a set of extrusions, join faces or fill holes.


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With Ctrl command Without Ctrl command

Use the control key to create a junction between 2 unconnected faces.

Select 2 unconnected faces or edges to create a junction


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Use the control key to fill holes

Select 4 connected faces or edges to fill a hole (using a trap or multi-selection)


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Use the Ctrl key to create combinations


Select 3 unplanned connected faces or edges

to fill the space between those faces

Select 2 unplanned connected faces oredges to combine an extrusion


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Use the control key to create holes

Select two faces to create a hole. This works if the faces are notdirectly connected and if the tangencies of the faces are aboutthe same. See next slide for details.


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Cases of hole creation

If the angle between the normal of the two selected faces is lessor equal to 90 degrees, the operation will result on a join of thetwo faces.


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Edge extrusion

If the topology of the mesh allows it to you, an othericon appears on the tools palette: Edges extrusion

Options: Fill

Extruding an Edge (1/3)

Examples

Fill option with propagation

Extrusion


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Extruding an edge of a flat surface using Fill option.


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Fill Extrusion

Extruding an edge of a flat surface using Fill option.


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Inserting the Sections

Cutting will propagate to the connected faces.

The Section Insertion function adds number of sections to the mesh whichwill cut faces in number of parts. Number of cuts can vary from 1 to 9.The slider on the right of the screen is used to define number of cuts.

Selected Edge

Slider


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Subdividing the Faces

Use the control key or a trap using ShiftKey to add elements and subdivide theselection.

The Subdivision function creates a set of faces inside the selected one.The slider on the right of the screen is used to define the ratio between0.1 to 0.9.


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Deleting the Faces

Use the control key or a trap using Shift Key toadd elements and subdivide the selection.

Use this function to erase faces or edges. It turns closed surfaces toopen ones.

Face erase

Edge erase


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Creating Basic Shapes

Recap Exercise

20 min

In this step you will create basic geometricalshapes. You will start with standard closedsurface and deform it to get the final shape.


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Operations

IMA Operations

Shape Operations


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IMA Operations

Associating Elements

Aligning VerticesSymmetry on subdivision surface

Defining the Working Zone


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Associating ElementsYou will learn how to link an existing subdivision surface to a point, line, curveor another surface.


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This function allows you to associate point, line, curve or surface to the mesh andthen deform the surface by deforming the associated element.

What Is Associating elements?

Any kind of curve/surface can be used:

IMA Curve/Surface

FreeStyle Curve/Surface

GSD Curve/Surface

Sketcher Curves

A toolbar contains a set of dedicated options

NameToolbar

Associated element Selection

Icon

Remove current association

Tools Palette(ForAlignment)

See SelectionTools session

Remove all associations


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To operate, you need a surface and at least one point,line, curve or surface.The function operates in object-action or action-object

You can select elements before running thefunction

You can run the function and select elementsSelect the function icon

Select the surfaceSelect the curveSelect the elements to associate to the curve, ablue line linking the selected vertices and thecurve shows the associationYou can add or remove associated vertices usingselection management (see correspondingsection)

You can add a new curve to the association using thefirst icon

Select a curveYou can remove the current curve association usingthis icon

Select then the first icon to select a curveYou can remove all the associated curve using thethird icon

Select then the first icon to select a curve

How to Create the Associativity


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More About the Associativity (1/4)

The curves deformation involves a surfacedeformation

To deform a curve see the CurveDeformation section

The mesh elements linked to the curvesare automatically moved

The surface is then recomputed

The vertices are still movable using either theModification function or the Vertex alignment


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Low mesh density

High mesh density

Curve close to theinitial surface

Warning, the surface will never follow exactly the shape of the curve !To optimize the morphing between the curve and the surface, you have first tocreate the curve as close as possible to the surface, and be sure the meshdensity is enough to follow the curve during deformation.

Example 1: (Surface associated to Curve)


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Curve far from theinitial surface

Low mesh density

High mesh density

Example 2:


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Example 3: (Surface associated to Points)

Example 4: (Surface associated to Surface)


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The vertex alignment is used to re-organize vertices of a mesh.

It allows the projection of vertices on plane or onto lines defined by thecompass.

A toolbar contains a set of dedicated options

Ex aligning of 2 vertices with the plane to refine the shape

Aligning Vertices (1/2)

De/Activate the working zone

NameToolbar

Projection on Line

Icon

Projection on Plane

Tools Palette(ForAlignment)

See CompassDefinition session



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The projections operate on the selected elements

Select Vertices Alignment icon

Use the compass definition to set the compass.The Compass is displayed with a specific look

Select elements to project

Use one of the projection icons to move theselected vertices onto the compass plane or ontothe compass normal

Aligning Vertices (2/2)


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Symmetry on subdivision surface

You will learn how to create a symmetry of subdivision surface in Imagine andShape workbench.


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To create a symmetry, you need a subdivision surface and a symmetryplane.Select the Symmetry icon

Select the surfaceSelect the symmetry plane (The order of selection may be reversed)

If the surface and symmetry plane are not intersecting, result is amathematical symmetry.

If the surface and symmetry plane are intersecting, you have a option toselect one of the two solutions.

Surface is made of two parts, separated by symmetry plane. The biggerside of the surface is chosen, by default for symmetry.

How to Create a Symmetry


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Defining the Working Zone

You will learn how to define the Working Zone in Imagine and Shapeworkbench.


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This function allows you to define a working area on a mesh in order tomodify only this part of the mesh.

What is Defining the Working Zone

A toolbar contains a dedicated option


NameToolbar

Swap selection

Icon

Tools Palette(For WorkingZone)


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How to Define the Working Zone

Working Zone definition Swap selection

Modification of Surface

In Modification Tools Palette, click De/Activate Working Zone to resetprotection of selected elements.

Select the function iconSelect the surfaceSelect the elements , which you want to modify, using Selection toolsYou can swap selection of selected elements. All protected elementsbecome unprotected and vice-versa

Select Modification icon and modify the elements in working zone.


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Shape OperationsYou will learn how to use set of Generative Shape Design functions withinImagine and Shape workbench.


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Shape operations toolbar lets you access a set of functions belonging toGenerative Shape Design (GSD) workbench

These functions can be used to create/modify curves/surface.

It avoids frequent switch of workbenches from IMA to GSD.

Trim Fillet

What are Shape Operations?


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Imagine and Shape RecommendationsYou will learn about general methodology and settings management.


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General Methodology (1/7)

Create Subdivisionsurfaces

Split/Trim/Fillet inIMA Shapeoperations

Create the Solid andadd Dress Up in Part

Design

1

2

3


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Use as much as possible Shift-trap for mesh selection combined with viewsmanagement (F4).

Do not hesitate to use and customize Shortcuts to functionsExample:

F10 Hide/ShowSpace Modify

Use as much as possible the Escape key to exit a function and a shortcut toModification function, for example the Space bar.

Ergonomic advices:Put your left hand on the left side of the keyboard for a quick access to:Control / shiftEscapeSpaceF4F2


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Create your model by using several Subdivision surfaces. Avoid as much aspossible to create a complex shape with only one surface.

Try to think how to decompose the shape into elementary blocs, and also usingsharp edges. This is the key to speed-up the creation. See corresponding (General

Methodology 4/6 , 5/6 and 6/6).

Keep the Subdivisions as light as possible by limiting the mesh density, this ensurea better surface quality and an easy interaction with.

Combine the subdivision surfaces with GSD operations or other (trim, split, fillet) tofinalize the shapes.

Take benefit of Sharp Edges modeling. This gives a better feeling of the shape. Thesharp edges are then similar to styling curves. Use then GSD fillets onto thoseedges.


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The mesh structure, so the Topology, has to be carefully managed, this is the keyto obtain the targeted shape.Before starting to create a shape, it is recommended to analyze the topologystructure of the shape you have in mind.Start then by creating a very light mesh structure corresponding to this shape, by

refining this mesh you will progressively get the final shape.A good way is to determine virtual sharp edges (filleted afterward with GSD), thisis very useful.

Example 1: Modeling a mouseIn most of the case, this has the following structureTo create model, start with a basic close surface



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Example 2: Modeling a plane toyThe main structure of the shape can be described as a set of blocs as shown in thepictureThose blocs are of course refined to obtain the final shape (insertion of sections,local subdivision, etc.


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Example 3: Modeling a plane toy / Bad topologyThis example shows a bad structure and the importance of this in the final shape.The main body of the plane is made one basic shape, we use subdivision and extrusion to addother blocs but the main body is not divided in pieces, this will never allow to catch the correctshape.


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Final result

Click any IMAcommands

Subdivision surfacesare highlighted

Modifications of

Subdivision surfacesare available.

Smart selectionWhen selecting a feature and launching any command, all the feature's fathers(subdivision surfaces or styling curves) are temporarily highlighted to enable an easyselection. The selected feature is also temporarily hidden. With this new behavior, youdont need to edit the subdivision surface in the specification tree.

Example:


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Always use materials, with reflections, for example apainting one.

To have a nice reflection image on the material do thefollowing:

Open Apply Materials catalog

Select Painting tab

Right Click on DS Dark Red material

In Rendering tab click this icon

Copy the address

Close all panels

In Tools/Options/Infrastructure/Material Librarypaste the address in Environment Image File field

Settings Management

Now apply any materials to the shape and ifnecessary increase the reflexivity value


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Settings Management

To get a nice look of the environment, set thefollowing:

Use two light sources with almost thoseparameters.

Use perspective view with angle higher than

15(default value) to inspect the geometryand to feel better the shapes .

Use the ground in perspective view to feelbetter the vanishing lines.

Use if possible two windows, one in parallel view and theother one in perspective and with the ground.

You can switch from one to the other one rapidly usingControl-Tab keys.


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Size Management

To better manage the size of your model, you can create a very light skeleton withsome dimensions.


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In order to easily manage data, we suggest to store Styling surfaces into a GeometricalSet and perform operations in separated ones. The styling surfaces are then easy tofind and modify.

Avoid if possible the use of Ordered Geometrical Set and PartBody containers tocreate Subdivisions or Styling Curves

Example:Create Three Geometrical set:One for the Styling surfacesOne for the Shape operationsOne to contain the results of the Shape operations

Tree Structure Management (1/4)


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Do the Shape operations inside the Operations Geometrical Set


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Copy the result with link of Shape operations inside the Results Geometrical Set, orcreate a Join containing the result. The access to key results is then faster and simple


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Solid operations are created in the Partbody


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Quality management 1/4

Sharp Edges

Collinear tangencies

Group of faces to subdivide

Collinear tangencies

Rules to apply in order to improve surface quality and insure offset computation

Subdivide sharp edges faces having collinear tangency corners propagating the subdivision to thecontinuous faces (multi-selection)

In some cases and in order to simplify the mesh, delete unnecessary faces at the boundaries (seenext slide)


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Suppression of unnecessary faces at theboundaries (in order to simplify the mesh)

Subdivided group of faces

Refinement of boundaries (points alignment)

1

2

3


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Valence 2

Valence 3(internal)

Valence 4

Valence 5

Valence 6

Valence 3(border)

The Valence of a vertex corresponds to the number of connected edgesExample:

If Valence = 4 internal or 2 border or 3 border surface quality = C2If Valence is different: the quality can be less (C1) but the surface can still be offset.


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Point located in highcurvature area

Point located in lowcurvature area

ExampleThe general idea is to move the particular valence points out of high curvature acceleration area

In a valence 5 case, very often managed in shapes, the shape located aroundthe valence 5 vertices is not very good.To improve this, subdivide the shape as illustrated and refine the mesh to geta similar shape. The surface quality is then better


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Methods to Obtain Nice Shapes

To obtain nice shape curvature, try as much as possible to get an homogeneouspoints distribution.

The first illustration shows a good mesh distribution, the shape is very smooth.

The second illustration shows a non homogeneous mesh distribution, the shape iswavy.


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Master Exercise 1: Perfume Bottle

Master Exercise Presentation: Perfume Bottle

Master Exercise Step (1): Creating the Main ShapeMaster Exercise Step (2): Splitting the Shape

Master Exercise Step (3): Creating the Nozzle

Master Exercise Step (4): Finishing the Perfume Bottle


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Perfume Bottle

Master Exercise Presentation

60 min

Create the main body of the Bottle.

Split the body.

Create the nozzle and finish the shape.

In this exercise you will design the shape of a Perfumebottle. To do so you will have to:


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Perfume Bottle

Step 1 - Creating the Main Shape

15 min

In this step, you will create shape of mainbody of the perfume bottle. For this you willstart with closed surface and modify it to getthe final shape.


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Perfume Bottle

Step 2 - Splitting the Shape

5 min

In this step you will split the main bodyshape. For this you have to create a curve,and create extruded surface from it inGenerative Shape Design workbench.


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Perfume Bottle

Step 3 - Creating the Nozzle

30 min

In this step you will create nozzle portionof the the perfume bottle. For this you willstart with a new closed surface. Try toobtain the shape of the nozzle similar tothat shown in the exercise.


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Perfume Bottle

Step 4 - Finishing the Perfume Bottle

10 min

In this step you will give the finishingtouch to the Perfume bottle. For thatyou have to:

Create solid from closed surfaces inPart Design workbench.

Apply color to the faces.

Apply transparency to the surfaces


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Added Exercise 1: Hair Dryer

Added Exercise Presentation: Hair Dryer

Added Exercise Step (1): Creating the Main ShapeAdded Exercise Step (2): Creating the Nozzle

Added Exercise Step (3): Creating the Top Shape

Added Exercise Step (4): Creating the Handle

Added Exercise Step (5): Creating the Buttons

Added Exercise Step (6): Creating the Wire


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Hair Dryer

Added Exercise Presentation

1Hr 40 min

In this exercise you will styling surfaces of aHair Dryer. You will design the shape ofvarious parts such as Main Body, Nozzle, Topshape and Buttons.


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Hair Dryer


15 min

In this step, you will design the main bodyshape of the Hair Dryer. You will start witha closed surface and deform it to obtainfinal body shape.

You might not get the exact shape, but tryto get as close shape as possible.


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Hair Dryer

Step 2 - Creating the Nozzle

20 min

In this step, you will create the shape of thenozzle. You will start with a new Closedsurface and after achieving a good style forthe nozzle you will join it to the main body.


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Hair Dryer

Step 3 - Creating the Top Shape

20 min

In this step you will create the TopShape. For this you will start with anew closed surface and approach to astyle near to shown in the example.Then you will join it with the main body.


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Hair Dryer

Step 4 - Creating the Handle

15 min

In this step you will create you willcreate shape of handle. For this you willstart with a new closed surface, modifyit. And, with the help of newly createdsurface you will trim the main body.


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Hair Dryer

Step 5 Creating the Buttons

15 min

In this step you will create two buttons onthe top shape. For this you will deform aclosed surface to get the required size andshape, and then you will move the buttonsin the right position.


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Hair Dryer

Step 6 Creating the Wire

15 min

In this step, you will create the shape ofthe wire. Try to get style for the wireclose to the one shown in the example.


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Added Exercise 2: Video Projector

Added Exercise Presentation: Video Projector

Added Exercise Step (1): Creating the Main ShapeAdded Exercise Step (2): Creating the First Part of Lens

Added Exercise Step (3): Creating Second Part of Lens

Added Exercise Step (4): Creating the Button

Added Exercise Step (5): Splitting the Shape

Added Exercise Step (6): Finishing the Video Projector


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Video Projector

Added Exercise Presentation

80 min

In this exercise you will design the stylesurfaces for a Video Projector.


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Video Projector


15 min

In this step you will main shape of theVideo Projector. The shape obtainedwill not be exact but try to get a stylenear to the shown in example.


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Video Projector

Step 2 - Creating the First Part of Lens

10 min

In this step, you will create main shapeof the of lens.


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Video Projector

Step 3 - Creating the Second Part of Lens

15 min

In this step, you will create front portion ofthe lens. Shape obtained will not be exactbut try to get the style near to the oneshown in the example.


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Video Projector

Step 4 Creating the Button

10 min

In this step you will create the shape ofthe button.


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Video Projector

Step 5 Splitting the Shape

15 min

In this step you will create an Opensurface. With the help of the Opensurface you will trim the main body ofthe Video Projector.


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Video Projector

Step 6 Finishing the Video Projector

15 min

In this step, you will give finishingtouches to the Video Projector byapplying fillets.


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More Exercises for Practice

Practice the following exercises.

9 Hrs 40 min

catia imagine and shape v5r17

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