/// <summary>
/// Draws a curve between startCoordinate and endCoordinate of movement according to the max offset,
/// specified by amp. Drawn using a sine function with rotation
/// Note that both Positions and slope have length of number of intervals + 1. This is for drawing purpose only.
/// </summary>
/// <param name="movement"></param>
/// <param name="bpm"></param>
/// <param name="amp"></param>
public Function(Movement movement, int bpm, float amp)
{
this.movement = movement;
Size = (int)((movement.endBeat - movement.startBeat + 1) / (float)bpm * 60 / INTERVAL_TIME) * 8;
Positions = new Vector2[Size + 1];
// Change coordinates so that (0,0) is bottom left
// Original start and ending positions specified by XML
Vector2 oStartPos = new Vector2(movement.startCoordinate.X, movement.startCoordinate.Y);
Vector2 oEndPos = new Vector2(movement.endCoordinate.X, movement.endCoordinate.Y);
shiftPos = oStartPos;
endPos = oEndPos - shiftPos;
if (amp == 0)
{
isStraightLine = true;
Position();
}
else
{
Vector2 endPosPrime = new Vector2(Vector2.Distance(oStartPos, oEndPos), 0);
Vector2 midPosPrime = new Vector2(endPosPrime.X / 2, 2 * amp);
// Rotation angle
double theta = Math.Atan((oEndPos.Y - oStartPos.Y) / (oEndPos.X - oStartPos.X));
if (oEndPos.X < oStartPos.X) theta += Math.PI;
double midPosX = Math.Cos(theta) * midPosPrime.X - Math.Sin(theta) * midPosPrime.Y;
double midPosY = Math.Sin(theta) * midPosPrime.X + Math.Cos(theta) * midPosPrime.Y;
midPos = new Vector2((float)midPosX, (float)midPosY);
Position();
}
}
private bool Expired(Movement m)
{
return m.fadeBeat < current_beat;
}
public override void Update(GameTime gameTime)
{
if (CountDownDone() && !watch.IsRunning)
{
Start();
}
if (satisfaction.maxAge == 0 )
{
if (!failed)
{
MediaPlayer.Stop();
distorted.Stop();
MediaPlayer.IsMuted = false;
MediaPlayer.Play(LevelFail);
}
failed = true;
}
else
{
satisfaction.Update(gameTime);
// Adjusts volume
Keys key = gameState.Input.Key;
if (key != Keys.None)
{
if (key == Keys.A)
{
volume = MathHelper.Clamp(volume + 1, 1, 10);
}
else if (key == Keys.Z)
{
volume = MathHelper.Clamp(volume - 1, 1, 10);
}
scaledVol = (float)(0.524 * Math.Pow(Math.E, volume / 10) - 0.425); // exponential scale
if (MediaPlayer.IsMuted) distorted.Volume = scaledVol;
else MediaPlayer.Volume = scaledVol;
}
//watch = watch.Add(gameTime.ElapsedGameTime);
current_beat = beat_sum + (int)Math.Round((float)watch.ElapsedMilliseconds / beatTime);
bool newMovement = false;
if (current_beat > last_beat) // new beat
{
last_beat = current_beat;
if (current_act != null && current_act.endBeat < current_beat)
{
current_act = null;
}
LinkedListNode<Movement> checkMove = actionList.First;
drawSet.RemoveWhere(Expired);
while (checkMove != null)
{
if (checkMove.Value.showBeat == current_beat)
{
drawSet.Add(checkMove.Value);
checkMove = checkMove.Next;
}
else if (checkMove.Value.showBeat > current_beat) break;
else checkMove = checkMove.Next;
}
do
{
// check and remove the head of the list
if (actionList.First != null && actionList.First.Value.startBeat == current_beat)
{
current_act = actionList.First.Value;
if (current_act.myType != Movement.Types.Control)
{
actionList.RemoveFirst();
c++;
newMovement = true;
}
else
{
beat_sum = current_beat;
accumulated_ms = accumulated_ms + (int)watch.ElapsedMilliseconds;
beatTime = 60000 / current_act.BPM;
actionList.RemoveFirst();
watch.Restart();
}
}
else break;
} while (true);
if (current_act != null)
{
Movement.Types type = current_act.myType;
float score = moveEval.Accuracy(current_act, buffer, gameTime);
gainedScore = (int)(score * 10);
// comboOn = moveEval.CurrentMovement !=null && moveEval.CurrentMovement.myType == Movement.Types.Wave ? gainedScore > 0 : true;
// Adjusts age of satisfaction queue
if (gainedScore < 0)
{
if (moveEval.CurrentMovement.myType == Movement.Types.Wave ) failCount++;
if (satisfaction.maxAge < 5) satisfaction.maxAge = 0;
else satisfaction.maxAge = Math.Max(4, satisfaction.maxAge - AGE_DECR);
if (failCount == 3 && current_act.myType == Movement.Types.Wave)
{
Random rand = new Random();
BrokenStrings[rand.Next(3)].Play();
}
else
{
if (failCount >= 5)
{
MediaPlayer.IsMuted = true;
distorted.Volume = scaledVol;
}
}
}
else
{
failCount = 0;
satisfaction.maxAge = Math.Min(SatisfactionQueue.MAX_AGE, satisfaction.maxAge + AGE_INCR);
MediaPlayer.IsMuted = false;
distorted.Volume = 0.0f;
}
moveEval.Update(current_act, score, (newMovement || actionList.Count == 0), gameTime, this);
/* Keep the combo on if it is now Wave and the most recent gainedScore is greater than 0 (i.e. success continues),
* or if combo is on before a Shake phase is entered,
* otherwise break the combo. */
// comboOn = !(gainedScore < 0 && type == Movement.Types.Wave /* and last is also wave */);
comboOn = gainedScore > 3 || (comboOn && gainedScore == 0);
/** Add to combo count if it is now Wave and combo is on,
* else if it is now Wave but combo is broken, reset count to 0,
* else if combo is on but a Shape or Noop phase is entered, keep the count until next Wave. */
comboCount = comboOn && moveEval.CurrentMovement.myType == Movement.Types.Wave ? comboCount + 1 : (type == Movement.Types.Wave ? 0 : comboCount);
if (comboCount > maxCombo) maxCombo = comboCount;
// if (actionList.First != null) // prevents score from endlessly increasing
/** Add gainedScore to current_score.
* If there is a combo and the most recent score is non-negative (e.g. Shaking is succuessful), also add the current combo count to the score */
if (actionList.Count != 0) current_score += (gainedScore + (comboCount > 1 && gainedScore > 0 ? comboCount : 0));
current_score = Math.Max(0, current_score);
if (newMovement) { buffer.Clear(); }
}
}
}
if (actionList.Count == 0 || failed)
{
untilClapping++;
if (untilClapping == 150) ended = true;
if (!failed && untilClapping == 150)
{
if (current_score < 1000)
{
SmallApplause.Play();
}
else
{
LargeApplause.Play();
}
}
backToMenu++;
}
if (backToMenu >= 420)
{
//UnloadContent(); // doesn't seem to work, i.e. memory usage does not decrease
if (!failed)
{
gameState.Score = current_score;
gameState.Combo = (maxCombo > 1 ? maxCombo : 0);
gameState.UpdateStats();
}
else
{
gameState.Score = -1;
gameState.Combo = -1;
}
gameState.CurrentScreen = gameState.PreviousScreen;
}
}
/**
public bool Timing(InputBuffer inputs, Point p, bool start)
{
if (inputs.Count != 0)
{
Vector2 coords = new Vector2(p.X, GameEngine.HEIGHT - p.Y);
Vector2 pos = (start ? inputs[0].Position : inputs[inputs.Count - 1].Position);
// Console.WriteLine("coords is " + coords);
// Console.WriteLine("pos is " + pos);
// Console.WriteLine("difference in pos is " + Vector2.Distance(coords, pos)+"\n");
return Vector2.Distance(coords, pos) <= 100;
}
else
{
return false;
}
} */
/*Returns a floating number 0 to 1 which indicates how well the input is matching the movement */
public float Accuracy(Movement m, InputBuffer inputs, GameTime t)
{
int totalInput = inputs.Count;
int correct = 0;
if (CurrentMovement != null)
{
switch (CurrentMovement.myType)
{
case Movement.Types.Noop:
return (totalInput > 20 ? -0.5f : 0.0f);
case Movement.Types.Shake:
if (totalInput < 20)
{
return 0.0f;
}
else
{
foreach (InputState state in inputs)
{
if (Math.Abs(state.Acceleration.X) > ACC_THRESHOLD || Math.Abs(state.Acceleration.Y) > ACC_THRESHOLD)
{
correct++;
}
}
return (float)correct / totalInput / 2;
}
case Movement.Types.Wave:
if (totalInput < 5)
{
return -0.3f;
}
else
{
Vector2 startPos = new Vector2(CurrentMovement.startCoordinate.X, CurrentMovement.startCoordinate.Y);
Vector2 endPos = new Vector2(CurrentMovement.endCoordinate.X, CurrentMovement.endCoordinate.Y);
float DIST_THRESHOLD = 0.55f * Vector2.Distance(startPos, endPos);
Vector2[] slopes = CurrentMovement.f.Slope(totalInput - 1);
float errorSum = 0.0f;
float dist = Vector2.Distance(inputs[totalInput - 1].Position, inputs[0].Position);
if (dist >= DIST_THRESHOLD)
{
for (int i = 1; i < totalInput; i++)
{
Vector2 normVel = Vector2.Normalize(inputs[i].Velocity);
Vector2 slope = slopes[i];
errorSum += (normVel.X - slope.X) * (normVel.X - slope.X) + (normVel.Y - slope.Y) * (normVel.Y - slope.Y);
}
float rmsError = (float)Math.Sqrt((double)errorSum / (double)(totalInput - 1));
float accuracy = (1 - rmsError * MAGIC_WAVE_THRESHOLD);
return (accuracy > FAIL_THRESHOLD ? accuracy : -0.3f);
}
else
{
return -0.3f;
}
}
default:
return 0.0f;
}
}
else
{
return 0.0f;
}
}
public MovementEvaluator(Movement m)
{
CurrentMovement = m;
}
public void Update(Movement m, float score, bool newMovement, GameTime t, PlayLevel level)
{
if (newMovement) // current movement is over, set state accordingly
{
//Debug.WriteLine("NEW MOVEMENT!");
// send score back to Movement
if (CurrentMovement != null)
{
if (score < FAIL_THRESHOLD)
{
CurrentMovement.setState(Movement.States.Fail);
}
else if (score >= FAIL_THRESHOLD)
{
CurrentMovement.setState(Movement.States.Succeed);
}
else // no op
{
CurrentMovement.setState(Movement.States.None);
}
}
CurrentMovement = m; // update movement
}
}