void CLocationCriteriaTableEntry::InitSelector (SSelectorInitCtx &InitCtx, CCompositeImageSelector *retSelector)
// InitSelector
//
// Initializes the selector
{
int i;
// Generate the table based on criteria and location
TProbabilityTable<int> ProbTable;
for (i = 0; i < m_Table.GetCount(); i++)
{
// Compute the probability of this entry at the
// given location.
int iChance = m_Table[i].Criteria.CalcLocationWeight(InitCtx.pSystem, InitCtx.sLocAttribs, InitCtx.vObjPos);
if (iChance > 0)
ProbTable.Insert(i, iChance);
}
// If none match, then add the default element
if (ProbTable.GetCount() == 0 && m_iDefault != -1)
ProbTable.Insert(m_iDefault, 1000);
// Roll
if (ProbTable.GetCount() > 0)
{
int iRoll = ProbTable.RollPos();
int iIndex = ProbTable[iRoll];
retSelector->AddVariant(GetID(), iIndex);
m_Table[iIndex].pImage->InitSelector(InitCtx, retSelector);
}
}
CSoundType *CSoundtrackManager::CalcGameTrackToPlay (const CString &sRequiredAttrib)
// CalcGameTrackToPlay
//
// Calculates a game track to play.
{
int i;
CSystem *pSystem = g_pUniverse->GetCurrentSystem();
// Create a probability table of tracks to play.
TSortMap<int, TProbabilityTable<CSoundType *>> Table(DescendingSort);
for (i = 0; i < g_pUniverse->GetSoundTypeCount(); i++)
{
CSoundType *pTrack = g_pUniverse->GetSoundType(i);
// If this is not appropriate music then skip it
if (!pTrack->HasAttribute(sRequiredAttrib))
continue;
// If this is a system track and we've already played a
// system track, then skip it.
else if (m_bSystemTrackPlayed
&& pTrack->HasAttribute(ATTRIB_SYSTEM_SOUNDTRACK))
continue;
// Calculate the chance for this track based on location
// criteria.
int iChance = (pSystem ? pSystem->CalcMatchStrength(pTrack->GetLocationCriteria()) : 1000);
if (iChance == 0)
continue;
// Adjust probability based on when we last played this tack.
switch (GetLastPlayedRank(pTrack->GetUNID()))
{
case 0:
iChance = 0;
break;
case 1:
iChance = iChance / 10;
break;
case 2:
iChance = iChance / 5;
break;
case 3:
case 4:
iChance = iChance / 3;
break;
case 5:
case 6:
case 7:
iChance = iChance / 2;
break;
case 8:
case 9:
case 10:
iChance = 2 * iChance / 3;
break;
}
if (iChance == 0)
continue;
// Add to the probability table
TProbabilityTable<CSoundType *> *pEntry = Table.SetAt(pTrack->GetPriority());
pEntry->Insert(pTrack, iChance);
}
// If the table is empty, then there is nothing to play.
if (Table.GetCount() == 0)
return NULL;
// Otherwise, roll out of the first table.
TProbabilityTable<CSoundType *> &Entry = Table[0];
return Entry.GetAt(Entry.RollPos());
}