//@Todo curve flags won't transfer over - it only overwritees
void FBlendedCurve::Blend(const FBlendedCurve& A, const FBlendedCurve& B, float Alpha)
{
check(A.Num()==B.Num());
if(FMath::Abs(Alpha) <= ZERO_ANIMWEIGHT_THRESH)
{
// if blend is all the way for child1, then just copy its bone atoms
Override(A);
}
else if(FMath::Abs(Alpha - 1.0f) <= ZERO_ANIMWEIGHT_THRESH)
{
// if blend is all the way for child2, then just copy its bone atoms
Override(B);
}
else
{
InitFrom(A);
for(int32 CurveId=0; CurveId<A.Elements.Num(); ++CurveId)
{
Elements[CurveId].Value = FMath::Lerp(A.Elements[CurveId].Value, B.Elements[CurveId].Value, Alpha);
Elements[CurveId].Flags |= (A.Elements[CurveId].Flags | B.Elements[CurveId].Flags);
}
}
ValidateCurve(this);
}
void FBlendedCurve::ConvertToAdditive(const FBlendedCurve& BaseCurve)
{
check(bInitialized);
check(Num()==BaseCurve.Num());
for(int32 CurveId=0; CurveId<Elements.Num(); ++CurveId)
{
Elements[CurveId].Value -= BaseCurve.Elements[CurveId].Value;
Elements[CurveId].Flags |= BaseCurve.Elements[CurveId].Flags;
}
ValidateCurve(this);
}
void FBlendedCurve::Accumulate(const FBlendedCurve& AdditiveCurve, float Weight)
{
check(bInitialized);
check(Num()==AdditiveCurve.Num());
if (Weight > ZERO_ANIMWEIGHT_THRESH)
{
for(int32 CurveId=0; CurveId<Elements.Num(); ++CurveId)
{
Elements[CurveId].Value += AdditiveCurve.Elements[CurveId].Value * Weight;
Elements[CurveId].Flags |= AdditiveCurve.Elements[CurveId].Flags;
}
}
ValidateCurve(this);
}
void FBlendedCurve::Combine(const FBlendedCurve& CurveToCombine)
{
check(bInitialized);
check(Num()==CurveToCombine.Num());
for(int32 CurveId=0; CurveId<CurveToCombine.Elements.Num(); ++CurveId)
{
// if target value is non zero, we accpet target's value
// originally this code was doing max, but that doesn't make sense since the values can be negative
// we could try to pick non-zero, but if target value is non-zero, I think we should accept that value
// if source is non zero, it will be overriden
if (CurveToCombine.Elements[CurveId].Value != 0.f)
{
Elements[CurveId].Value = CurveToCombine.Elements[CurveId].Value;
}
Elements[CurveId].Flags |= CurveToCombine.Elements[CurveId].Flags;
}
ValidateCurve(this);
}