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Add **Any State to Anim Graph state machines**

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This commit is contained in:
Wojtek Figat
2023-04-24 20:20:27 +02:00
parent 65e477cfd0
commit 7158cfb5bf
7 changed files with 507 additions and 375 deletions
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160
Source/Engine/Animations/Graph/AnimGroup.Animation.cpp
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@@ -11,7 +11,7 @@
namespace
{
void BlendAdditiveWeightedRotation(Quaternion& base, Quaternion& additive, float weight)
FORCE_INLINE void BlendAdditiveWeightedRotation(Quaternion& base, Quaternion& additive, float weight)
{
// Pick a shortest path between rotation to fix blending artifacts
additive *= weight;
@@ -463,6 +463,79 @@ Variant AnimGraphExecutor::SampleState(AnimGraphNode* state)
return result;
}
void AnimGraphExecutor::UpdateStateTransitions(AnimGraphContext& context, const AnimGraphNode::StateMachineData& stateMachineData, AnimGraphInstanceData::StateMachineBucket& stateMachineBucket, const AnimGraphNode::StateBaseData& stateData)
{
int32 transitionIndex = 0;
while (transitionIndex < ANIM_GRAPH_MAX_STATE_TRANSITIONS && stateData.Transitions[transitionIndex] != AnimGraphNode::StateData::InvalidTransitionIndex)
{
const uint16 idx = stateData.Transitions[transitionIndex];
ASSERT(idx < stateMachineData.Graph->StateTransitions.Count());
auto& transition = stateMachineData.Graph->StateTransitions[idx];
if (transition.Destination == stateMachineBucket.CurrentState)
{
// Ignore transition to the current state
transitionIndex++;
continue;
}
const bool useDefaultRule = EnumHasAnyFlags(transition.Flags, AnimGraphStateTransition::FlagTypes::UseDefaultRule);
if (transition.RuleGraph && !useDefaultRule)
{
// Execute transition rule
auto rootNode = transition.RuleGraph->GetRootNode();
ASSERT(rootNode);
if (!(bool)eatBox((Node*)rootNode, &rootNode->Boxes[0]))
{
transitionIndex++;
continue;
}
}
// Evaluate source state transition data (position, length, etc.)
const Value sourceStatePtr = SampleState(stateMachineBucket.CurrentState);
auto& transitionData = context.TransitionData; // Note: this could support nested transitions but who uses state machine inside transition rule?
if (ANIM_GRAPH_IS_VALID_PTR(sourceStatePtr))
{
// Use source state as data provider
const auto sourceState = (AnimGraphImpulse*)sourceStatePtr.AsPointer;
auto sourceLength = Math::Max(sourceState->Length, 0.0f);
transitionData.Position = Math::Clamp(sourceState->Position, 0.0f, sourceLength);
transitionData.Length = sourceLength;
}
else
{
// Reset
transitionData.Position = 0;
transitionData.Length = ZeroTolerance;
}
// Check if can trigger the transition
bool canEnter = false;
if (useDefaultRule)
{
// Start transition when the current state animation is about to end (split blend duration evenly into two states)
const auto transitionDurationHalf = transition.BlendDuration * 0.5f + ZeroTolerance;
const auto endPos = transitionData.Length - transitionDurationHalf;
canEnter = transitionData.Position >= endPos;
}
else if (transition.RuleGraph)
canEnter = true;
if (canEnter)
{
// Start transition
stateMachineBucket.ActiveTransition = &transition;
stateMachineBucket.TransitionPosition = 0.0f;
break;
}
// Skip after Solo transition
// TODO: don't load transitions after first enabled Solo transition and remove this check here
if (EnumHasAnyFlags(transition.Flags, AnimGraphStateTransition::FlagTypes::Solo))
break;
transitionIndex++;
}
}
void ComputeMultiBlendLength(float& length, AnimGraphNode* node)
{
ANIM_GRAPH_PROFILE_EVENT("Setup Mutli Blend Length");
@@ -1502,77 +1575,21 @@ void AnimGraphExecutor::ProcessGroupAnimation(Box* boxBase, Node* nodeBase, Valu
}
}
ASSERT(bucket.CurrentState && bucket.CurrentState->GroupID == 9 && bucket.CurrentState->TypeID == 20);
ASSERT(bucket.CurrentState && bucket.CurrentState->Type == GRAPH_NODE_MAKE_TYPE(9, 20));
// Update transitions
// Note: this logic assumes that all transitions are sorted by Order property and Enabled
// Note: this logic assumes that all transitions are sorted by Order property and Enabled (by Editor when saving Anim Graph asset)
while (!bucket.ActiveTransition && transitionsLeft-- > 0)
{
// Check if can change the current state
const auto& stateData = bucket.CurrentState->Data.State;
int32 transitionIndex = 0;
while (stateData.Transitions[transitionIndex] != AnimGraphNode::StateData::InvalidTransitionIndex
&& transitionIndex < ANIM_GRAPH_MAX_STATE_TRANSITIONS)
// State transitions
UpdateStateTransitions(context, data, bucket, bucket.CurrentState->Data.State);
// Any state transitions
// TODO: cache Any state nodes inside State Machine to optimize the loop below
for (const AnimGraphNode& anyStateNode : data.Graph->Nodes)
{
const uint16 idx = stateData.Transitions[transitionIndex];
ASSERT(idx < data.Graph->StateTransitions.Count());
auto& transition = data.Graph->StateTransitions[idx];
const bool useDefaultRule = EnumHasAnyFlags(transition.Flags, AnimGraphStateTransition::FlagTypes::UseDefaultRule);
if (transition.RuleGraph && !useDefaultRule)
{
// Execute transition rule
auto rootNode = transition.RuleGraph->GetRootNode();
ASSERT(rootNode);
if (!(bool)eatBox((Node*)rootNode, &rootNode->Boxes[0]))
{
transitionIndex++;
continue;
}
}
// Evaluate source state transition data (position, length, etc.)
const Value sourceStatePtr = SampleState(bucket.CurrentState);
auto& transitionData = context.TransitionData; // Note: this could support nested transitions but who uses state machine inside transition rule?
if (ANIM_GRAPH_IS_VALID_PTR(sourceStatePtr))
{
// Use source state as data provider
const auto sourceState = (AnimGraphImpulse*)sourceStatePtr.AsPointer;
auto sourceLength = Math::Max(sourceState->Length, 0.0f);
transitionData.Position = Math::Clamp(sourceState->Position, 0.0f, sourceLength);
transitionData.Length = sourceLength;
}
else
{
// Reset
transitionData.Position = 0;
transitionData.Length = ZeroTolerance;
}
// Check if can trigger the transition
bool canEnter = false;
if (useDefaultRule)
{
// Start transition when the current state animation is about to end (split blend duration evenly into two states)
const auto transitionDurationHalf = transition.BlendDuration * 0.5f + ZeroTolerance;
const auto endPos = transitionData.Length - transitionDurationHalf;
canEnter = transitionData.Position >= endPos;
}
else if (transition.RuleGraph)
canEnter = true;
if (canEnter)
{
// Start transition
bucket.ActiveTransition = &transition;
bucket.TransitionPosition = 0.0f;
break;
}
// Skip after Solo transition
// TODO: don't load transitions after first enabled Solo transition and remove this check here
if (EnumHasAnyFlags(transition.Flags, AnimGraphStateTransition::FlagTypes::Solo))
break;
transitionIndex++;
if (anyStateNode.Type == GRAPH_NODE_MAKE_TYPE(9, 34))
UpdateStateTransitions(context, data, bucket, anyStateNode.Data.AnyState);
}
// Check for instant transitions
@@ -1608,13 +1625,10 @@ void AnimGraphExecutor::ProcessGroupAnimation(Box* boxBase, Node* nodeBase, Valu
}
// Entry
case 19:
{
// Not used
CRASH;
break;
}
// State
case 20:
// Any State
case 34:
{
// Not used
CRASH;
@@ -1622,8 +1636,6 @@ void AnimGraphExecutor::ProcessGroupAnimation(Box* boxBase, Node* nodeBase, Valu
}
// State Output
case 21:
value = box->HasConnection() ? eatBox(nodeBase, box->FirstConnection()) : Value::Null;
break;
// Rule Output
case 22:
value = box->HasConnection() ? eatBox(nodeBase, box->FirstConnection()) : Value::Null;