# Design an Easter Egg

Hi! I wish you all a Happy Easter 2019!!

This is a new Design Fast Tutorial (nb.5) and of course I wanted to show you how we could design a simple Easter Egg on CATIA using shape design.

The purpose of this video is to highlight a new feature in Generative Shape Design called Disconnect.

First, we will start by making an egg on a geometrical set (surface design) then sketch some curved lines and project them on the egg. we will use the disconnect feature to create several patches on the model.

The second phase will focus on transform this shape into a solid. Use the automatic fillet to smooth our egg and just have fun by coloring it!

Use Captions and Enjoy :)

2. ### Step 2: Make an "Easy" Egg ;)

* better to watch video on link above *

Create a 3D part on Generative Shape Design

Call it Easter Egg 2019

Make a sketch on a vertical plane

Draw a circle Ø30mm and an ellipse H60mm W30mm

-> In that way the circle and the ellipse are tangent

Use the quick trim feature to cut the higher part of the circle and the lower part of the ellipse

Exit the sketch

Split the sketch in 2 with a perpendicular plane

* If you run a porcupine analysis, you will see that the continuity between the circle and the ellipse is broken *

* Therefore it is necessary to use the curve smooth feature on the sketch *

Click on curve smooth feature

Select the option "curvature" and put a value of 2mm

Run the porcupine analysis again and observe the new result

* The egg profile is correct, it is time to create a shape *

Do a revolute of 360deg of the sketch using Z-axis

3. ### Step 3: Split the egg in several domains

Create a sketch on a vertical plane (same use for creating the profile)

Draw several splines passing through each sides of the egg

Exit the sketch

Project the sketch on the egg (along X-axis, unpick "nearest solution")

click on OK and keep all sub-elements

* the splines are now projected on the egg *

Use the feature Disconnect on the projection to split the egg in several domain

Launch the feature Extract

Click on the small marble bag and select all the domain of the egg

* In that case you should have 6 extract *

4. ### Step 4: Transform the Surface into a Solid

Switch to Part Design Application

Define the Part Body as Work Object

Use the Thick Surface feature on the first domain (on top)

Put 1mm value

Use the Thick Surface feature on the second domain

Put 0,5mm value

...

Reproduce the same scenario on the other domain, alterning between 1mm and 0,5mm

...

Hide the Geometrical Set

* you should obtain this result *

5. ### Step 5: Refine and Color the Egg

The last step of this tutorial is to add fillet to the egg and color each domain

In Refine Tab of the action bar select Auto Fillet feature

Put a 0,25mm value

Click on OK

* The operation can take some time, due to the amount of edges *

Change the advanced visualization (select material with smooth edges)

* the rendering option should give you this visualization *

Right click on the background of the screen and show object properties panel

Select the Color Palette

Go to Textures / Painting

-> Now it up to you to paint your egg with the color you want, so have fun!

Optional: If you edit the curvature of each spline in the sketch, exit and update, you can change the shape of each domain.

• End of Tutorial (and Happy Easter 2019!)