How to draw pattern on inside of sphere

[reecekenney50]

Hello,

I am trying to re-create the design of a Pokeball. I have the exterior complete but I am now trying to understand how to create the inside pattern. I've attached an image for reference, but essentially I'm looking for some direction in creating the blue shapes on the inside of the sphere. Ideally, I would be able to have these shapes stick out from the surface slightly too.

I have played around with some things, such as extruding a cylinder from above the sphere through to the bottom and then used the combine tool to create the intersecting part as a new body. The problem with that is that I'm not sure how to now extrude(?) this upwards from the surface by a few millimetres. And to be honest, I don't even know if that was the right approach to start with.  

Happy to do my own research, so any vague direction would be much appreciated. I'm just not sure where to start. Thanks in advance

[davebYYPCU]

couple of ways to do it, 

I used an offset surface body, and cut it into a band, with Extrude > Intersect, Thickened, can be joined to the solid ball if required.  Pattern if more are needed.

Might help....

[Drewpan]

Hi,

Similar way but different.

Draw a sketch of a half circle. Dimension it. Constrain etc.

In SURFACE mode, revolve the sketch around an axis and create a spherical surface.

You now have a Body that is only a surface. You build the outside and inside of your sphere from this.

Lets start with the inside. Go back to SOLID and use the Thicken command and make the inside whatever you want.

We want the INSIDE so we thicken a MINUS value.

We now have a body so lets slice it up. Create a sketch and draw a cutting tool. Project the body of the sphere onto

the sketch to help create the tool.

Extrude cut your sphere with the cutting tool.

Houston - we have a problem, but only a little one.

Front view

Right view.

Lets fix it. New sketch, this time on the plane we need to fix and project body again.

We know the dimensions so put them in and join up the projected lines.

Extrude cut the bits we don't want.

Rinse and repeat on the bottom. Not the most efficient way to do this but I am making it up as I go.

Slice it in half with the plane and Remove (NOT Delete) the top part.

Now make a mirror of the bottom and make sure it is a New Body and not Join.

Change the bodies into Components and give them an appearance.

Ok. Outside now. Go back to our original spherical surface and thicken it on the outside (positive). Then slice it.

Turn it into Components. Make them pretty colours and you can work out the rest.

Not my best effort but I did do it on the fly.

Cheers

Andrew