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Stair Geometry

Number of Arms​

  • The number of arms defines the overall geometry of the staircase.
  • A setting of 0 arms creates a continuous spiral form, while higher values up to 4 arm introduce segmented arms, eventually overlapping at the start and end to form closed or complex looped configurations.

Stair Types​

Three stair configurations are available:

  • Type 1: Stairs with landings, adding a landing at every corner.
  • Type 2: Stairs driven by a climb curve, with steps arrayed along the curve.
  • Type 3: Stairs based on inner and outer borders, dividing the border into equal segments.

Arm-Based Constraints​

Some stair types are restricted based on the number of arms:

  • 0 Arm: Only Type 3 is supported. Since the stair rotates beyond 360 degrees, steps are generated through revolution rather than drawn curves.
  • 1 Arm: Also limited to Type 3, since climb curve wouldnt affect step distribution and there are no corners for landings (which can be added by other means)
  • 2 to 4 Arms: No restrictions — all stair types are available.

Landing Settings​

Type 1 Convert Arm to Landing​

  • Each arm can be converted into a landing by toggling its corresponding control in the UI.

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Type 2 & Type 3 Convert Steps to Landing​

  • Individual steps can be converted into landings by selecting them directly in the user interface.
  • The total number of steps remains unchanged, but the remaining steps are resized to accommodate the new landing, maintaining the overall stair height while introducing landing areas where designed.

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Extend Stair​

Each end of the stair can be independently extended or shortened, allowing for asymmetrical arm lengths and more flexible layouts.

Edge Fillets​

Edges can be customized with variable fillet values, ranging from subtle curves to a full round, or kept sharp based on design intent.