private IReadOnlyList <VariableValue> EvaluateParameters(IReadOnlyList <string> parameterExpressions)
{
if (parameterExpressions is not null && parameterExpressions.Count > 0)
{
List <VariableValue> values = new List <VariableValue>(parameterExpressions.Count);
for (int i = 0; i < parameterExpressions.Count; i++)
{
values.Add(ScriptingHost.Evaluate(parameterExpressions[i]));
}
return(values);
}
return(null);
}
private void InternalStep()
{
// Get next event
ScheduledEvent nextEvent = Schedule.GetNext();
OnVertexFiring(nextEvent.Target);
// Update internal variables
Clock = nextEvent.Time;
EventCount[Graph.Verticies.IndexOf(nextEvent.Target)]++;
// Assign parameters
AssignParameters(nextEvent.Target, nextEvent.ParameterValues);
// Execute event
ScriptingHost.Execute(nextEvent.Target.Code);
// Evaluate trace variables
EvaluateTraces();
OnVertexFired(nextEvent.Target);
// Evaluate edges
for (int i = 0; i < Graph.Edges.Count; i++)
{
if (Graph.Edges[i].Source == nextEvent.Target)
{
Edge edge = Graph.Edges[i];
// Check condition
if (ScriptingHost.Evaluate(edge.Condition, VariableValue.True).AsBoolean())
{
OnEdgeFiring(edge);
// Evaluate parameters
IReadOnlyList <VariableValue> parameterValues = EvaluateParameters(edge.ParameterExpressions);
switch (edge.Action)
{
case EdgeAction.Schedule:
double time = Clock + ScriptingHost.Evaluate(edge.Delay, new VariableValue(Schedule.DefaultDelay)).AsNumber();
double priority = ScriptingHost.Evaluate(edge.Priority, new VariableValue(Schedule.DefaultPriority)).AsNumber();
Schedule.Insert(edge.Target, time, priority, parameterValues);
break;
case EdgeAction.CancelNext:
Schedule.CancelNext(edge.Target, parameterValues);
break;
case EdgeAction.CancelAll:
Schedule.CancelAll(edge.Target, parameterValues);
break;
}
OnEdgeFired(edge);
}
}
}
if (!KeepGoing())
{
State = SimulationState.Complete;
}
}