void Difficulty::ProcessVSpeeds(TimingData& BPS, TimingData& VerticalSpeeds, double SpeedConstant)
{
VerticalSpeeds.clear();
if (SpeedConstant) // We're using a CMod, so further processing is pointless
{
TimingSegment VSpeed;
VSpeed.Time = 0;
VSpeed.Value = SpeedConstant;
VerticalSpeeds.push_back(VSpeed);
return;
}
// Calculate velocity at time based on BPM at time
for (auto Time = BPS.begin();
Time != BPS.end();
++Time)
{
float VerticalSpeed;
TimingSegment VSpeed;
if (Time->Value)
{
float spb = 1 / Time->Value;
VerticalSpeed = MeasureBaseSpacing / (spb * 4);
}
else
VerticalSpeed = 0;
VSpeed.Value = VerticalSpeed;
VSpeed.Time = Time->Time; // We blindly take the BPS time that had offset and drift applied.
VerticalSpeeds.push_back(VSpeed);
}
// Let first speed be not-null.
if (VerticalSpeeds.size() && VerticalSpeeds[0].Value == 0)
{
for (auto i = VerticalSpeeds.begin();
i != VerticalSpeeds.end();
++i)
{
if (i->Value != 0)
VerticalSpeeds[0].Value = i->Value;
}
}
}
void Difficulty::GetPlayableData(VectorTN NotesOut,
TimingData& BPS,
TimingData& VerticalSpeeds,
TimingData& Warps,
float Drift, double SpeedConstant)
{
/*
We'd like to build the notes' position from 0 to infinity,
however the real "zero" position would be the judgment line
in other words since "up" is negative relative to 0
and 0 is the judgment line
position would actually be
judgeline - positiveposition
and positiveposition would just be
measure * measuresize + fraction * fractionsize
In practice, since we use a ms-based model rather than a beat one,
we just do regular integration of
position = sum(speed_i * duration_i) + speed_current * (time_current - speed_start_time)
*/
assert(Data != nullptr);
ProcessBPS(BPS, Drift);
ProcessVSpeeds(BPS, VerticalSpeeds, SpeedConstant);
if (!SpeedConstant) // If there is a speed constant having speed changes is not what we want
ProcessSpeedVariations(BPS, VerticalSpeeds, Drift);
if (SpeedConstant) Warps.clear();
else Warps = Data->Warps;
// From here on, we'll just copy the notes out. Otherwise, just leave the processed data.
if (!NotesOut)
return;
for (int KeyIndex = 0; KeyIndex < Channels; KeyIndex++)
NotesOut[KeyIndex].clear();
/* For all channels of this difficulty */
for (int KeyIndex = 0; KeyIndex < Channels; KeyIndex++)
{
int MIdx = 0;
/* For each measure of this channel */
for (auto Msr = Data->Measures.begin();
Msr != Data->Measures.end();
++Msr)
{
/* For each note in the measure... */
ptrdiff_t total_notes = Msr->Notes[KeyIndex].size();
for (auto Note = 0; Note < total_notes; Note++)
{
/*
Calculate position. (Change this to TrackNote instead of processing?)
issue is not having the speed change data there.
*/
NoteData &CurrentNote = (*Msr).Notes[KeyIndex][Note];
TrackNote NewNote;
NewNote.AssignNotedata(CurrentNote);
NewNote.AddTime(Drift);
float VerticalPosition = IntegrateToTime(VerticalSpeeds, NewNote.GetStartTime());
float HoldEndPosition = IntegrateToTime(VerticalSpeeds, NewNote.GetTimeFinal());
// if upscroll change minus for plus as well as matrix at screengameplay7k
if (!CurrentNote.EndTime)
NewNote.AssignPosition(VerticalPosition);
else
NewNote.AssignPosition(VerticalPosition, HoldEndPosition);
// Okay, now we want to know what fraction of a beat we're dealing with
// this way we can display colored (a la Stepmania) notes.
// We should do this before changing time by drift.
double cBeat = IntegrateToTime(BPS, NewNote.GetStartTime());
double iBeat = floor(cBeat);
double dBeat = (cBeat - iBeat);
NewNote.AssignFraction(dBeat);
double Wamt = -GetWarpAmountAtTime(CurrentNote.StartTime);
NewNote.AddTime(Wamt);
if (!SpeedConstant || (NewNote.IsJudgable() && !IsWarpingAt(CurrentNote.StartTime)))
NotesOut[KeyIndex].push_back(NewNote);
}
MIdx++;
}
// done with the channel - sort it
std::stable_sort(NotesOut[KeyIndex].begin(), NotesOut[KeyIndex].end(),
[](const TrackNote &A, const TrackNote &B) -> bool
{
return A.GetVertical() < B.GetVertical();
});
}
}
void Difficulty::ProcessBPS(TimingData& BPS, double Drift)
{
/*
Calculate BPS. The algorithm is basically the same as VSpeeds.
BPS time is calculated applying the offset and drift.
*/
assert(Data != NULL);
TimingData &StopsTiming = Data->Stops;
BPS.clear();
for (auto Time = Timing.begin();
Time != Timing.end();
++Time)
{
TimingSegment Seg;
Seg.Time = TimeFromTimingKind(Timing, StopsTiming, *Time, BPMType, Offset, Drift);
Seg.Value = BPSFromTimingKind(Time->Value, BPMType);
BPS.push_back(Seg);
}
/* Sort for justice */
sort(BPS.begin(), BPS.end());
if (!StopsTiming.size() || BPMType != VSRG::Difficulty::BT_BEAT) // Stops only supported in Beat mode.
return;
/* Here on, just working with stops. */
for (auto Time = StopsTiming.begin();
Time != StopsTiming.end();
++Time)
{
TimingSegment Seg;
double TValue = TimeAtBeat(Timing, Offset + Drift, Time->Time) + StopTimeAtBeat(StopsTiming, Time->Time);
double TValueN = TimeAtBeat(Timing, Offset + Drift, Time->Time) + StopTimeAtBeat(StopsTiming, Time->Time) + Time->Value;
/* Initial Stop */
Seg.Time = TValue;
Seg.Value = 0;
/* First, eliminate collisions. */
for (auto k = BPS.begin(); k != BPS.end();)
{
if (k->Time == TValue) /* Equal? Remove the collision, leaving only the 0 in front. */
{
k = BPS.erase(k);
if (k == BPS.end())
break;
else continue;
}
++k;
}
// Okay, the collision is out. Let's push our 0-speeder.
BPS.push_back(Seg);
// Now we find what bps to restore to.
float bpsRestore = bps(SectionValue(Timing, Time->Time));
for (auto k = BPS.begin(); k != BPS.end(); )
{
if (k->Time > TValue && k->Time <= TValueN) // So wait, there's BPM changes in between? Holy shit.
{
bpsRestore = k->Value; /* This is the last speed change in the interval that the stop lasts. We'll use it. */
/* Eliminate this since we're not going to use it. */
k = BPS.erase(k);
if (k == BPS.end())
break;
continue;
}
++k;
}
/* Restored speed after stop */
Seg.Time = TValueN;
Seg.Value = bpsRestore;
BPS.push_back(Seg);
}
std::sort(BPS.begin(), BPS.end());
}