Minecraft circle generator

Row by row

Top-left quarter, from the top edge down to the centre line. "Skip" is the empty blocks from the left edge. Build the quarter, then mirror it across both centre lines.

How to build it in the game

Place two lines of blocks that cross at the centre, one east to west and one north to south. These are your guide lines. Then build one quarter using the row list above, counting blocks from the centre line outwards. When the quarter is done, copy it into the other three corners.

Count each row twice before you move on. A single block out of place in the first quarter ends up in all four.

Odd or even diameter

An odd diameter has one centre block. Use it when you want a pillar, a beacon or a spawner in the middle, such as the shaft of a round tower. An even diameter has a 2×2 block at the centre and no single middle block. Use it when you want a wide opening in the middle, like a round pool, a fountain or a dome with a 2×2 skylight.

Spheres and domes

A sphere is a stack of circles. Build the widest circle in the middle layer, then step up with a slightly smaller diameter on each layer until you reach a single block or a small cap. A dome is the top half of the same stack. Generate each layer here, one diameter at a time, and keep the centre lines in the same place on every layer.

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