void FAnimNode_StateMachine::SetState(const FAnimationBaseContext& Context, int32 NewStateIndex)
{
if (NewStateIndex != CurrentState)
{
const int32 PrevStateIndex = CurrentState;
if(CurrentState != INDEX_NONE && CurrentState < OnGraphStatesExited.Num())
{
OnGraphStatesExited[CurrentState].ExecuteIfBound(*this, CurrentState, NewStateIndex);
}
// Determine if the new state is active or not
const bool bAlreadyActive = GetStateWeight(NewStateIndex) > 0.0f;
SetStateInternal(NewStateIndex);
if (!bAlreadyActive && !IsAConduitState(NewStateIndex))
{
// Initialize the new state since it's not part of an active transition (and thus not still initialized)
FAnimationInitializeContext InitContext(Context.AnimInstance);
StatePoseLinks[NewStateIndex].Initialize(InitContext);
// Also update BoneCaching.
FAnimationCacheBonesContext CacheBoneContext(Context.AnimInstance);
StatePoseLinks[NewStateIndex].CacheBones(CacheBoneContext);
}
if(CurrentState != INDEX_NONE && CurrentState < OnGraphStatesEntered.Num())
{
OnGraphStatesEntered[CurrentState].ExecuteIfBound(*this, PrevStateIndex, CurrentState);
}
}
}
void FAnimNode_StateMachine::ConditionallyCacheBonesForState(int32 StateIndex, FAnimationBaseContext Context)
{
// Only call CacheBones when needed.
check(StateCacheBoneCounters.IsValidIndex(StateIndex));
if (!StateCacheBoneCounters[StateIndex].IsSynchronizedWith(Context.AnimInstanceProxy->GetCachedBonesCounter()))
{
// keep track of states that have had CacheBones called on.
StateCacheBoneCounters[StateIndex].SynchronizeWith(Context.AnimInstanceProxy->GetCachedBonesCounter());
FAnimationCacheBonesContext CacheBoneContext(Context.AnimInstanceProxy);
StatePoseLinks[StateIndex].CacheBones(CacheBoneContext);
}
}