private static List <OsuMovement> createMovements(List <OsuHitObject> hitObjects, double clockRate, List <Vector <double> > strainHistory)
{
OsuMovement.Initialize();
var movements = new List <OsuMovement>();
if (hitObjects.Count == 0)
{
return(movements);
}
// the first object
movements.AddRange(OsuMovement.ExtractMovement(hitObjects[0]));
// the rest
for (int i = 1; i < hitObjects.Count; i++)
{
var obj0 = i > 1 ? hitObjects[i - 2] : null;
var obj1 = hitObjects[i - 1];
var obj2 = hitObjects[i];
var obj3 = i < hitObjects.Count - 1 ? hitObjects[i + 1] : null;
var tapStrain = strainHistory[i];
movements.AddRange(OsuMovement.ExtractMovement(obj0, obj1, obj2, obj3, tapStrain, clockRate));
}
return(movements);
}
public static double CalculateCheeseHitProb(OsuMovement movement, double tp, double cheeseLevel)
{
double perMovementCheeseLevel = cheeseLevel;
if (movement.EndsOnSlider)
{
perMovementCheeseLevel = 0.5 * cheeseLevel + 0.5;
}
double cheeseMt = movement.MovementTime * (1 + perMovementCheeseLevel * movement.CheesableRatio);
return(FittsLaw.CalculateHitProb(movement.Distance, cheeseMt, tp));
}
/// <summary>
/// Estimates the probability of hitting the given <paramref name="movement"/>, with added penalty for cheesable
/// movements given by <paramref name="cheeseLevel"/>.
/// </summary>
/// <param name="movement">The movement being performed by the player.</param>
/// <param name="throughput">
/// The assumed throughput of the player in terms of Fitts's law
/// (functioning as a skill measure).
/// </param>
/// <param name="cheeseLevel">The penalty to apply to cheesable movements.</param>
public static double GetHitProbabilityAdjustedForCheese(OsuMovement movement, double throughput, double cheeseLevel)
{
double perMovementCheeseLevel = cheeseLevel;
if (movement.EndsOnSlider)
{
perMovementCheeseLevel = 0.5 * cheeseLevel + 0.5;
}
// if the movement can be cheesed, movement time is increased, resulting in a difficulty decrease
double adjustedMovementTime = movement.MovementTime * (1 + perMovementCheeseLevel * movement.CheeseWindow);
return(FittsLaw.ProbabilityToHit(movement.Distance, adjustedMovementTime, throughput));
}
/// <summary>
/// Converts hit objects into movements.
/// </summary>
/// <param name="hitObjects">List of all map hit objects</param>
/// <param name="strainHistory">List of all hit objects' tap strain</param>
/// <param name="noteDensities">List of all hit objects' visual note densities</param>
/// <param name="clockRate">Clock rate</param>
/// <param name="hidden">Are we calculating hidden mod?</param>
/// <returns>List of all movements</returns>
private static List <OsuMovement> createMovements(List <OsuHitObject> hitObjects, double clockRate, List <Vector <double> > strainHistory,
bool hidden = false, List <double> noteDensities = null)
{
var movements = new List <OsuMovement>();
if (hitObjects.Count == 0)
{
return(movements);
}
// the first object
movements.AddRange(OsuMovement.ExtractMovement(hitObjects[0]));
// the rest
for (int i = 1; i < hitObjects.Count; i++)
{
var objNeg4 = i > 3 ? hitObjects[i - 4] : null;
var objNeg2 = i > 1 ? hitObjects[i - 2] : null;
var objPrev = hitObjects[i - 1];
var objCurr = hitObjects[i];
var objNext = i < hitObjects.Count - 1 ? hitObjects[i + 1] : null;
var tapStrain = strainHistory[i];
if (hidden)
{
movements.AddRange(OsuMovement.ExtractMovement(objNeg2, objPrev, objCurr, objNext, tapStrain, clockRate,
hidden: true, noteDensity: noteDensities[i], objNeg4: objNeg4));
}
else
{
movements.AddRange(OsuMovement.ExtractMovement(objNeg2, objPrev, objCurr, objNext, tapStrain, clockRate, objNeg4: objNeg4));
}
}
return(movements);
}
private static double calculateCheeseHitProb(OsuMovement movement, double tp, double cheeseLevel)
{
double cheeseMT = movement.MT * (1 + cheeseLevel * movement.CheesableRatio);
return(FittsLaw.CalculateHitProb(movement.D, cheeseMT, tp));
}
