CodeMirror

model BouncingBall

  parameter Real e = 0.7;

  parameter Real g = 9.81;

  Real h(start=1);

  Real v;

  Boolean flying(start=true);

  Boolean impact;

  Real v_new;

equation

  impact = h <= 0.0;

  der(v) = if flying then -g else 0;

  der(h) = v;

  when {h <= 0.0 and v <= 0.0, impact} then

    v_new = if edge(impact) then -e*pre(v) else 0;

    flying = v_new > 0;

    reinit(v, v_new);

  end when;

  annotation (uses(Modelica(version="3.2")));

end BouncingBall;

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