/// <summary>
/// Initializes a new instance of the <see cref="SpiceInstance"/> class.
/// </summary>
/// <param name="parameters">The method description.</param>
/// <param name="state">The biasing simulation state.</param>
/// <param name="maxOrder">The maximum order.</param>
protected SpiceInstance(SpiceMethod parameters, IBiasingSimulationState state, int maxOrder)
{
Parameters = parameters.ThrowIfNull(nameof(parameters));
State = state.ThrowIfNull(nameof(state));
MaxOrder = maxOrder;
States = new NodeHistory <SpiceIntegrationState>(maxOrder + 2);
}
/// <summary>
/// Initializes a new instance of the <see cref="ConvergenceAid"/> class.
/// </summary>
/// <param name="variable">The variable.</param>
/// <param name="state">The biasing simulation state.</param>
/// <param name="value">The value.</param>
/// <exception cref="ArgumentNullException">Thrown if <paramref name="variable"/> or <paramref name="state"/> is <c>null</c>.</exception>
/// <exception cref="SpiceSharpException">Thrown if the variable for the convergence aid was not found.</exception>
public ConvergenceAid(IVariable variable, IBiasingSimulationState state, double value)
{
Variable = variable.ThrowIfNull(nameof(variable));
Value = value;
_state = state.ThrowIfNull(nameof(state));
if (!state.Map.Contains(variable))
{
throw new SpiceSharpException(Properties.Resources.Simulations_ConvergenceAidVariableNotFound.FormatString(variable.Name));
}
_index = state.Map[variable];
_diagonal = _state.Solver.GetElement(new MatrixLocation(_index, _index));
_rhs = !Value.Equals(0.0) ? _state.Solver.GetElement(_index) : _state.Solver.FindElement(_index);
_state.Solution[_index] = Value;
}
