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!

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Use Captions and Enjoy :)

  1. Step 1: Video

  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!)