Easy way to build circles and arches

Very basic step by step for new players or quick tip for everyone.

Introduction and tl;dr

For older players this whole guide will just fit in tl;dr tip that might come in handy one day. Still I decided to make full basic step by step for beginers. Why not?
Also I found a practical use for Spherical Gravity Generator.

Curves on ships make them look a lot more interesting, but the larger radius you want it to have, the more work and fine tuning it takes to create a nice shape. I found out you can skip a lot of work by using Spherical Gravity Generator as a guideline.

tl;dr
Build around spherical gravity field. Done.

What do you need

All what you need is normal and 2x1x1 slope of Armor block, Spherical Gravity Generator, Battery and Antenna.
While armor will be obviously used to build, generator will create guidelines for us.

Step 1 - Cross

That's simple. Just make a cross with armor. It will determine the radius of your circle. I made it 10 in my build.
Maximal radius you can have with that method is about 160 blocks. That's where Spherical Gravity Generator's range ends
Then connect it's lines on the bottom. You can use batteries for that.
If you don't have any antenna on this grid, that's also a good temporary place for it.

Step 2 - Guidelines

On the other side of your cross, delete the center block and put Spherical Gravity Generator inside.
Place it on side and with controll panel facing upward. You'll see why later.
In Generator's terminal set Show on HUD to On.
If you don't want to deal with artificial gravity or power for any reason, you can set Acceleration to almost 0. Absolute 0 will turn Generator off though.
Next go to Info tab and check Show gravity range
Now back in terminal set Generator's Radius to match it's field with the furthest block on your cross. It doesn't need to be very precise.
If you want you can use [radius in blocks] * 2.5 + 1.75 as radius of gravity field.
Now you should see a green sphere around your cross. There are 2 points where sphere's lines cross. Having those points away from our to be circle will be easier. That's why we placed Generator like we did.

Step 3 - Build around

Pick one end of your cross and use blocks to follow the gravity field.

Mirror curvature on the other end of your cross, to keep the nice shape.

You can use symetry tool to build all four parts at once.
Now without guidelines.

The end

Maybe circle with radius of 10 blocks isn't that impresive and could be made without all of this, but this method becomes more and more helpfull when you try bigger radius. 60 for example.
Do you see that little cyan dot near the center? That's me.
This took me just few minutes.
I hope you'll find it any usefull. Have fun building!

[C.DEF]

And if you so happen to struggle with making a giant cube... you know where this is going.

[IceGecko]

MS Paint, draw a circle, each pixel is a block, job done.

[Kakss]

kbot10, if you mean to build a ring, you can just lower radius of the gravity generator and use it as template for inner border.

[kbot10]

this is good for full circles but what about hollow ones? how would you hollow them out if u made a circle like this? still really good just suggesting that you make a new method for this

[AenesidemusOZ]

Brilliantly simple.

[CMANIAC1]

you're a fucking legend

[Procedural Texture]

I don't know why I never thought of this. Great tip!

[Cucag]

you are a god

[Kakss]

That's a cool website, but I was looking for something ingame then.

[oats]

thx helps alot
but wont help for eliptical shapes
http://oranj.io/blog/VoxelSphereGenerator
that'l help