/// <summary>
/// Palauttaa kappaleessa tapahtuneet muutokset edelliseen päivitykseen nähden.
/// </summary>
/// <returns></returns>
public SongState Update()
{
SongState state = new SongState(false, MelodyChange.None, false);
if (currentBeatIndex < beatMoments.Length)
{
state.IsBeat = SecondsPlayed > beatMoments[currentBeatIndex];
if (state.IsBeat)
currentBeatIndex++;
}
if (currentOnsetIndex < onsetMoments.Length)
{
bool newOnset = SecondsPlayed > onsetMoments[currentOnsetIndex];
if (newOnset)
{
state.IsOnset = true;
// currentOnsetIndex++;
/*float frequencyOnPreviousOnset = frequencies[currentFrequencyIndex];
int bComplementIndex = Array.BinarySearch(frequencyMoments, SecondsPlayed);
if (bComplementIndex < 0)
{
// ei suoraa osumaa, indeksi on seuraavaksi suuremman arvon indeksin bitwise complement
// (https://msdn.microsoft.com/en-us/library/2cy9f6wb.aspx)
bComplementIndex = ~bComplementIndex; // ~ on bitwise complement -operaattori
}
currentFrequencyIndex = bComplementIndex;
currentOnsetIndex++; // skipataan osa, sama binaryhaku tähän
float currentFrequency = frequencies[currentFrequencyIndex];
*/
// jos taajuus +- 1/4 sävelaskeleen sisällä edellisestä, sama nuotti uudestaan
// jos yli 1/4, ylempi
// jos alle 1/4, alempi
float frequencyOnPreviousOnset;
if (currentOnsetIndex - 1 >= 0)
frequencyOnPreviousOnset = onsetFrequencies[currentOnsetIndex - 1];
else frequencyOnPreviousOnset = 0;
float currentFrequency = onsetFrequencies[currentOnsetIndex];
currentOnsetIndex++;
// ei ihan tarkka, mutta close enough i think
float quarterStepDownChange = (frequencyOnPreviousOnset - (frequencyOnPreviousOnset / HALF_STEP_FREQUENCY_CHANGE));
float quarterStepUpChange = ((frequencyOnPreviousOnset * HALF_STEP_FREQUENCY_CHANGE) - frequencyOnPreviousOnset);
if (currentFrequency > frequencyOnPreviousOnset + quarterStepUpChange)
{
state.Change = MelodyChange.HigherNote;
return state;
}
if (currentFrequency < frequencyOnPreviousOnset - quarterStepDownChange)
{
state.Change = MelodyChange.LowerNote;
return state;
}
state.Change = MelodyChange.SameNote;
}
}
return state;
}
void SongUpdate(SongState state, KeyboardChange keyChange)
{
if (state.IsBeat)
{
CreateShardPolygon(RandomGen.NextFloat(SPMinRadius, SPMaxRadius), RandomGen.NextFloat(SPMinSpeed, SPMaxSpeed));
}
switch (state.Change)
{
case MelodyChange.None:
break;
case MelodyChange.SameNote:
// testPoly.Position += new Vector2(25.0f, 0.0f);
break;
case MelodyChange.HigherNote:
testPoly.Position += new Vector2(0.0f, -25.0f);
break;
case MelodyChange.LowerNote:
testPoly.Position += new Vector2(0.0f, 25.0f);
break;
default:
break;
}
if (state.IsOnset)
{
}
}