This command splits points of a cloud into 3 or 4 categories:
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Walls,
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Floors and ceilings,
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Others.
Requirements
Select the point clouds to split and launch the command.
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Set the angular tolerance for walls (maximum angle with nadir-zenith line).
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Set the angular tolerance for floors and ceilings (maximum slope).
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You can change the slider for the Local Normal Smoothing. This slider allows you to increase or decrease the radius of the influence zone on a cloud, in order to take into account a bigger part of the cloud.
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Choose the point clouds to create:
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Walls to classify the points which meet the threshold.
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Floors and Ceilings to classify the points which meet the threshold. Floors and Ceiling are also segmented when all inputs have scanning directions.
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Other to keep other points.
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Notes
This command computes local point cloud normals to segment it. Consequently, any cleaning or segmentation done before may result in a slightly different segmentation.