create stair by 2D shape,arc,Fan line,donut arc , Irregularity spline,Single Line,Multi Line to stair.

1.Arc to SpiralStair
original shape: arc

result: SpiralStair

2.Fan line to SpiralStair
original shape: Fan line

result: SpiralStair


3.Donut Arc to SpiralStair
original shape: donut arc

result: SpiralStair


4.Irregularity Shape
original shape: Irregularity spline

result: Irregularity Steps


5.Single Line to Steps
original shape:Single Line

result: Steps


6.Multi Line to Steps
original shape:Multi Line

result: Steps


UI:

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