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Add **Interruption options** to State Machine transition

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This commit is contained in:
Wojtek Figat
2023-04-25 10:47:10 +02:00
parent 7158cfb5bf
commit 698a9f1938
3 changed files with 103 additions and 64 deletions
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56
Source/Engine/Animations/Graph/AnimGroup.Animation.cpp
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@@ -1521,12 +1521,11 @@ void AnimGraphExecutor::ProcessGroupAnimation(Box* boxBase, Node* nodeBase, Valu
// State Machine
case 18:
{
ANIM_GRAPH_PROFILE_EVENT("State Machine");
const int32 maxTransitionsPerUpdate = node->Values[2].AsInt;
const bool reinitializeOnBecomingRelevant = node->Values[3].AsBool;
const bool skipFirstUpdateTransition = node->Values[4].AsBool;
ANIM_GRAPH_PROFILE_EVENT("State Machine");
// Prepare
auto& bucket = context.Data->State[node->BucketIndex].StateMachine;
auto& data = node->Data.StateMachine;
@@ -1558,6 +1557,11 @@ void AnimGraphExecutor::ProcessGroupAnimation(Box* boxBase, Node* nodeBase, Valu
// Reset all state buckets pof the graphs and nodes included inside the state machine
ResetBuckets(context, data.Graph);
}
#define END_TRANSITION() \
ResetBuckets(context, bucket.CurrentState->Data.State.Graph); \
bucket.CurrentState = bucket.ActiveTransition->Destination; \
bucket.ActiveTransition = nullptr; \
bucket.TransitionPosition = 0.0f
// Update the active transition
if (bucket.ActiveTransition)
@@ -1567,11 +1571,42 @@ void AnimGraphExecutor::ProcessGroupAnimation(Box* boxBase, Node* nodeBase, Valu
// Check for transition end
if (bucket.TransitionPosition >= bucket.ActiveTransition->BlendDuration)
{
// End transition
ResetBuckets(context, bucket.CurrentState->Data.State.Graph);
bucket.CurrentState = bucket.ActiveTransition->Destination;
bucket.ActiveTransition = nullptr;
bucket.TransitionPosition = 0.0f;
END_TRANSITION();
}
// Check for transition interruption
else if (EnumHasAnyFlags(bucket.ActiveTransition->Flags, AnimGraphStateTransition::FlagTypes::InterruptionRuleRechecking))
{
const bool useDefaultRule = EnumHasAnyFlags(bucket.ActiveTransition->Flags, AnimGraphStateTransition::FlagTypes::UseDefaultRule);
if (bucket.ActiveTransition->RuleGraph && !useDefaultRule)
{
// Execute transition rule
auto rootNode = bucket.ActiveTransition->RuleGraph->GetRootNode();
if (!(bool)eatBox((Node*)rootNode, &rootNode->Boxes[0]))
{
bool cancelTransition = false;
if (EnumHasAnyFlags(bucket.ActiveTransition->Flags, AnimGraphStateTransition::FlagTypes::InterruptionInstant))
{
cancelTransition = true;
}
else
{
// Blend back to the source state (remove currently applied delta and rewind transition)
bucket.TransitionPosition -= context.DeltaTime;
bucket.TransitionPosition -= context.DeltaTime;
if (bucket.TransitionPosition <= ZeroTolerance)
{
cancelTransition = true;
}
}
if (cancelTransition)
{
// Go back to the source state
ResetBuckets(context, bucket.CurrentState->Data.State.Graph);
bucket.ActiveTransition = nullptr;
bucket.TransitionPosition = 0.0f;
}
}
}
}
}
@@ -1595,11 +1630,7 @@ void AnimGraphExecutor::ProcessGroupAnimation(Box* boxBase, Node* nodeBase, Valu
// Check for instant transitions
if (bucket.ActiveTransition && bucket.ActiveTransition->BlendDuration <= ZeroTolerance)
{
// End transition
ResetBuckets(context, bucket.CurrentState->Data.State.Graph);
bucket.CurrentState = bucket.ActiveTransition->Destination;
bucket.ActiveTransition = nullptr;
bucket.TransitionPosition = 0.0f;
END_TRANSITION();
}
}
@@ -1620,6 +1651,7 @@ void AnimGraphExecutor::ProcessGroupAnimation(Box* boxBase, Node* nodeBase, Valu
// Update bucket
bucket.LastUpdateFrame = context.CurrentFrameIndex;
#undef END_TRANSITION
break;
}