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Double accelerating point mass

Example of a two accelerating point masses in codyn. This model shows how multiple nodes can be used to implement different entities.

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# Global gravity, accessible from child nodes
g = 9.81

# Define a single node named n1
node "n1" {
    # Position of the point mass
    y = 20

    # Mass
    m = 0.6

    # External force, air friction
    f = "-dy"

    # Acceleration
    y'' = "-g + f / m"
}

# Define a single node named n2
node "n2" {
    # Position of the point mass
    y = 8

    # Mass
    m = 0.4

    # External force, air friction
    f = "-dy"

    # Acceleration
    y'' = "-g + f / m"
}

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