bool UPoseableMeshComponent::AllocateTransformData()
{
// Allocate transforms if not present.
if ( Super::AllocateTransformData() )
{
if( LocalAtoms.Num() != SkeletalMesh->RefSkeleton.GetNum() )
{
LocalAtoms = SkeletalMesh->RefSkeleton.GetRefBonePose();
TArray<FBoneIndexType> RequiredBoneIndexArray;
RequiredBoneIndexArray.AddUninitialized(LocalAtoms.Num());
for(int32 BoneIndex = 0; BoneIndex < LocalAtoms.Num(); ++BoneIndex)
{
RequiredBoneIndexArray[BoneIndex] = BoneIndex;
}
RequiredBones.InitializeTo(RequiredBoneIndexArray, *SkeletalMesh);
}
FillSpaceBases();
FlipEditableSpaceBases();
return true;
}
LocalAtoms.Empty();
return false;
}
void UPoseableMeshComponent::RefreshBoneTransforms(FActorComponentTickFunction* TickFunction)
{
SCOPE_CYCLE_COUNTER(STAT_RefreshBoneTransforms);
// Can't do anything without a SkeletalMesh
if( !SkeletalMesh )
{
return;
}
// Do nothing more if no bones in skeleton.
if( GetNumSpaceBases() == 0 )
{
return;
}
// We need the mesh space bone transforms now for renderer to get delta from ref pose:
FillSpaceBases();
FlipEditableSpaceBases();
MarkRenderDynamicDataDirty();
}
void USkeletalMeshComponent::RefreshBoneTransforms()
{
SCOPE_CYCLE_COUNTER(STAT_RefreshBoneTransforms);
// Can't do anything without a SkeletalMesh
// Do nothing more if no bones in skeleton.
if( !SkeletalMesh || SpaceBases.Num() == 0 )
{
return;
}
AActor * Owner = GetOwner();
const FAnimUpdateRateParameters & UpdateRateParams = Owner ? Owner->AnimUpdateRateParams : FAnimUpdateRateParameters();
{
FScopeLockPhysXWriter LockPhysXForWriting;
// Recalculate the RequiredBones array, if necessary
if( !bRequiredBonesUpToDate )
{
RecalcRequiredBones(PredictedLODLevel);
}
// Update rate turned off, evaluate every frame.
if( !bEnableUpdateRateOptimizations || (UpdateRateParams.GetEvaluationRate() <= 1) )
{
// evaluate pure animations, and fill up LocalAtoms
EvaluateAnimation();
// We need the mesh space bone transforms now for renderer to get delta from ref pose:
FillSpaceBases();
// Invalidate cached bones.
CachedLocalAtoms.Empty();
CachedSpaceBases.Empty();
}
else
{
// figure out if our cache is invalid.
const bool bInvalidCachedBones = (LocalAtoms.Num() != SkeletalMesh->RefSkeleton.GetNum())
|| (LocalAtoms.Num() != CachedLocalAtoms.Num())
|| (SpaceBases.Num() != CachedSpaceBases.Num());
// If cache is invalid, we need to rebuild it. And we can't interpolate.
// (same path if we're not interpolating and not skipping a frame).
if( bInvalidCachedBones || (!UpdateRateParams.ShouldInterpolateSkippedFrames() && !UpdateRateParams.ShouldSkipEvaluation()) )
{
// evaluate pure animations, and fill up LocalAtoms
EvaluateAnimation();
// Fill SpaceBases from LocalAtoms
FillSpaceBases();
// Cache bones
CachedLocalAtoms = LocalAtoms;
CachedSpaceBases = SpaceBases;
}
else
{
// No interpolation, just copy
// @todo: if we don't blend any physics, we could even skip the copy.
if( !UpdateRateParams.ShouldInterpolateSkippedFrames() )
{
LocalAtoms = CachedLocalAtoms;
SpaceBases = CachedSpaceBases;
}
else
{
// If we are not skipping evaluation this frame, refresh cache.
if( !UpdateRateParams.ShouldSkipEvaluation() )
{
// Preserve LocalAtoms and SpaceBases, so we can keep interpolation.
Exchange(LocalAtoms, CachedLocalAtoms);
Exchange(SpaceBases, CachedSpaceBases);
// evaluate pure animations, and fill up LocalAtoms
EvaluateAnimation();
// Fill SpaceBases from LocalAtoms
FillSpaceBases();
Exchange(LocalAtoms, CachedLocalAtoms);
Exchange(SpaceBases, CachedSpaceBases);
}
// Interpolate
{
SCOPE_CYCLE_COUNTER(STAT_InterpolateSkippedFrames);
const float Alpha = 0.25f + (1.f / float(FMath::Max(UpdateRateParams.GetEvaluationRate(), 2) * 2));
FAnimationRuntime::LerpBoneTransforms(LocalAtoms, CachedLocalAtoms, Alpha, RequiredBones);
FAnimationRuntime::LerpBoneTransforms(SpaceBases, CachedSpaceBases, Alpha, RequiredBones);
}
}
}
}
// Transforms updated, cached local bounds are now out of date.
InvalidateCachedBounds();
// update physics data from animated data
UpdateKinematicBonesToPhysics(false);
UpdateRBJointMotors();
}
// @todo anim : hack TTP 224385 ANIM: Skeletalmesh double buffer
// this is problem because intermediate buffer changes physics position as well
// this causes issue where a half of frame, physics position is fixed with anim pose, and the other half is real simulated position
// if you enable physics in tick, since that's before physics update, you'll get animation pose dominating physics pose, which isn't what you want. (Or what you'll see)
// so do not update transform if physics is on. This problem will be solved by double buffer, when we keep one buffer for intermediate, and the other buffer for result query
{
FScopeLockPhysXReader LockPhysXForReading;
if( !IsSimulatingPhysics() )
{
SCOPE_CYCLE_COUNTER(STAT_UpdateLocalToWorldAndOverlaps);
// New bone positions need to be sent to render thread
UpdateComponentToWorld();
// animation often change overlap.
UpdateOverlaps();
}
}
MarkRenderDynamicDataDirty();
}