Base

Base:
    .doc: """
Defines the links of the tracks of a track system. Note that this link description
also specifies the track width and height.

Example:

In the example below, the links are boxes via the LinkDescription.Box,
and the visual geometry is added with the box visual trait.

Link is TrackSystem.Components.Tracks.LinkDescription.Box:
    with TrackSystem.Components.Tracks.Traits.BoxVisual
    width: 0.2
    height: 0.05

The variation of the links is defined as a box variation, which allows
for cyclic variations in the width and height of the links.

Link is TrackSystem.Components.Tracks.LinkDescription.Box:
    with TrackSystem.Components.Tracks.Traits.BoxVisual
    width: 0.2
    height: 0.05
    variation becomes TrackSystem.Components.Tracks.LinkVariation.Box:
        height_variation becomes Math.Distributions.Cyclic.DiscretePulse:
            period: 5
            amplitude: 0.1
        width_variation becomes Math.Distributions.Cyclic.DiscretePulse:
            period: 5
            amplitude: 0.05
"""
    inertia is Physics3D.Bodies.Inertia
    local_cm_transform is Math.AffineTransform
    variation is TrackSystem.Components.Tracks.LinkVariation.Base
    width is Real
    height is Real