Can someone explain what is going on in this piece of code?

[Terradive]

It comes from the Legend of Revolutions Mod. It is from the CVPlayer.cpp file. It is trying to delete a unit and it goes to looking at selection groups. Is a selection group a group of selected units? If yes what happens if a unit is unselectable?

void CvPlayer::deleteUnit(int iID)																	
{
	m_units.removeAt(iID);
}


CvSelectionGroup* CvPlayer::firstSelectionGroup(int *pIterIdx, bool bRev) const
{
	return !bRev ? m_selectionGroups.beginIter(pIterIdx) : m_selectionGroups.endIter(pIterIdx);
}


CvSelectionGroup* CvPlayer::nextSelectionGroup(int *pIterIdx, bool bRev) const
{
	return !bRev ? m_selectionGroups.nextIter(pIterIdx) : m_selectionGroups.prevIter(pIterIdx);
}


int CvPlayer::getNumSelectionGroups() const																
{
	return m_selectionGroups.getCount();
}


CvSelectionGroup* CvPlayer::getSelectionGroup(int iID) const												
{
	return ((CvSelectionGroup *)(m_selectionGroups.getAt(iID)));
}


CvSelectionGroup* CvPlayer::addSelectionGroup()
{
	return ((CvSelectionGroup *)(m_selectionGroups.add()));
}

 

[duckstab]

It comes from the Legend of Revolutions Mod. It is from the CVPlayer.cpp file. It is trying to delete a unit and it goes to looking at selection groups. Is a selection group a group of selected units? If yes what happens if a unit is unselectable?

void CvPlayer::deleteUnit(int iID)																	
{
	m_units.removeAt(iID);
}


CvSelectionGroup* CvPlayer::firstSelectionGroup(int *pIterIdx, bool bRev) const
{
	return !bRev ? m_selectionGroups.beginIter(pIterIdx) : m_selectionGroups.endIter(pIterIdx);
}


CvSelectionGroup* CvPlayer::nextSelectionGroup(int *pIterIdx, bool bRev) const
{
	return !bRev ? m_selectionGroups.nextIter(pIterIdx) : m_selectionGroups.prevIter(pIterIdx);
}


int CvPlayer::getNumSelectionGroups() const																
{
	return m_selectionGroups.getCount();
}


CvSelectionGroup* CvPlayer::getSelectionGroup(int iID) const												
{
	return ((CvSelectionGroup *)(m_selectionGroups.getAt(iID)));
}


CvSelectionGroup* CvPlayer::addSelectionGroup()
{
	return ((CvSelectionGroup *)(m_selectionGroups.add()));
}

These are totally separate methods from a C++ class. It's not a sequential script. If deleteUnit() gets called, then the only code that gets executed is what's between the curly braces, i.e.

m_units.removeAt(iID);

 

[The_J]

Is a selection group a group of selected units?

More or less. It's everything which gets moved around together, so every AI stack is a selection group, but single workers too.

 

[Terradive]

CvSelectionGroup* CvPlayer::getSelectionGroup(int iID) const
{
return ((CvSelectionGroup *)(m_selectionGroups.getAt(iID)));
}

I am having problems with this piece of code when called. There apparently is no value in it. I believe because it is looking for a unit that has been deleted. I am trying to alter it to this in attempt to get around this. If anyone has a better idea, I would appreciate it.

CvSelectionGroup* CvPlayer::getSelectionGroup(int iID) const
{
if (iID != NULL)
return ((CvSelectionGroup *)(m_selectionGroups.getAt(iID)))
}