FBox FKBoxElem::CalcAABB(const FTransform& BoneTM, float Scale) const
{
FTransform ElemTM = GetTransform();
ElemTM.ScaleTranslation( FVector(Scale) );
ElemTM *= BoneTM;
FVector Extent(0.5f * Scale * X, 0.5f * Scale * Y, 0.5f * Scale * Z);
FBox LocalBox(-Extent, Extent);
return LocalBox.TransformBy(ElemTM);
}
void UGeometryCacheComponent::UpdateLocalBounds()
{
FBox LocalBox(0);
for (const FTrackRenderData& Section : TrackSections)
{
// Use World matrix per section for correct bounding box
LocalBox += (Section.MeshData->BoundingBox.TransformBy(Section.WorldMatrix));
}
LocalBounds = LocalBox.IsValid ? FBoxSphereBounds(LocalBox) : FBoxSphereBounds(FVector(0, 0, 0), FVector(0, 0, 0), 0); // fallback to reset box sphere bounds
UpdateBounds();
}
FBoxSphereBounds UTextRenderComponent::CalcBounds(const FTransform& LocalToWorld) const
{
if(!Text.IsEmpty() && Font)
{
FVector2D Size(FLT_MIN, 0);
FVector2D LeftTop(FLT_MAX, FLT_MAX);
float FirstLineHeight = -1;
FTextIterator It(*Text.ToString());
float AdjustedXScale = WorldSize * XScale * InvDefaultSize;
float AdjustedYScale = WorldSize * YScale * InvDefaultSize;
while (It.NextLine())
{
FVector2D LineSize = ComputeTextSize(It, Font, AdjustedXScale, AdjustedYScale, HorizSpacingAdjust);
float LineLeft = ComputeHorizontalAlignmentOffset(LineSize, HorizontalAlignment);
Size.X = FMath::Max(LineSize.X, Size.X);
Size.Y += LineSize.Y > 0 ? LineSize.Y : Font->GetMaxCharHeight();
LeftTop.X = FMath::Min(LeftTop.X, LineLeft);
if (FirstLineHeight < 0)
{
FirstLineHeight = LineSize.Y;
}
int32 Ch;
while (It.NextCharacterInLine(Ch));
}
LeftTop.Y = ComputeVerticalAlignmentOffset(Size.Y, VerticalAlignment, FirstLineHeight);
FBox LocalBox(FVector(0, -LeftTop.X, -LeftTop.Y), FVector(0, -(LeftTop.X + Size.X), -(LeftTop.Y + Size.Y)));
FBoxSphereBounds Ret(LocalBox.TransformBy(LocalToWorld));
Ret.BoxExtent *= BoundsScale;
Ret.SphereRadius *= BoundsScale;
return Ret;
}
else
{
return FBoxSphereBounds(ForceInit);
}
}
