public MelodyMachine(List <Note> _notes, List <MelodyTansitionInfo> _transitions)
{
random = new System.Random();
//Read in states
foreach (var note in _notes)
{
states.Add(new MelodyState()
{
Note = note
});
}
//Read in transitions
foreach (var transition in _transitions)
{
MelodyState start = states[transition.A];
MelodyState end = states[transition.B];
if (!transitions.ContainsKey(start))
{
transitions[start] = new List <MelodyTransition>();
}
transitions[start].Add(new MelodyTransition()
{
Probability = transition.Probability, TargetState = end
});
}
//Normalize probabilities
foreach (var stateTrans in transitions)
{
float totalProbability = 0;
foreach (var trans in stateTrans.Value)
{
totalProbability += trans.Probability;
}
for (int i = 0; i < stateTrans.Value.Count; i++)
{
stateTrans.Value[i].Probability /= totalProbability;
}
}
//Start in random state;
currentState = states[0];
}
public void Next()
{
float rand = (float)random.NextDouble();
var availableTransitions = transitions[currentState];
foreach (var trans in availableTransitions)
{
if (rand < trans.Probability)
{
currentState = trans.TargetState;
break;
}
rand -= trans.Probability;
}
}
