/** @return true if something was selected/deselected, false otherwise. */
bool FModeTool_GeometryModify::FrustumSelect( const FConvexVolume& InFrustum, bool InSelect /* = true */ )
{
bool bResult = false;
if( GEditorModeTools().IsModeActive( FBuiltinEditorModes::EM_Geometry ) )
{
FEdModeGeometry* mode = (FEdModeGeometry*)GEditorModeTools().GetActiveMode( FBuiltinEditorModes::EM_Geometry );
for( FEdModeGeometry::TGeomObjectIterator Itor( mode->GeomObjectItor() ) ; Itor ; ++Itor )
{
FGeomObject* go = *Itor;
FTransform ActorToWorld = go->GetActualBrush()->ActorToWorld();
// Check each vertex to see if its inside the frustum
for( int32 v = 0 ; v < go->VertexPool.Num() ; ++v )
{
FGeomVertex& gv = go->VertexPool[v];
if( InFrustum.IntersectBox( ActorToWorld.TransformPosition( gv.GetMid() ), FVector::ZeroVector ) )
{
gv.Select( InSelect );
bResult = true;
}
}
}
}
return bResult;
}
void GetViewFrustumBounds(FConvexVolume& OutResult, const FMatrix& ViewProjectionMatrix, const FPlane& InFarPlane, bool bOverrideFarPlane, bool UseNearPlane)
{
OutResult.Planes.Empty( 6 );
FPlane Temp;
// Near clipping plane.
if(UseNearPlane && ViewProjectionMatrix.GetFrustumNearPlane(Temp))
{
OutResult.Planes.Add(Temp);
}
// Left clipping plane.
if(ViewProjectionMatrix.GetFrustumLeftPlane(Temp))
{
OutResult.Planes.Add(Temp);
}
// Right clipping plane.
if(ViewProjectionMatrix.GetFrustumRightPlane(Temp))
{
OutResult.Planes.Add(Temp);
}
// Top clipping plane.
if(ViewProjectionMatrix.GetFrustumTopPlane(Temp))
{
OutResult.Planes.Add(Temp);
}
// Bottom clipping plane.
if(ViewProjectionMatrix.GetFrustumBottomPlane(Temp))
{
OutResult.Planes.Add(Temp);
}
// Far clipping plane.
if (bOverrideFarPlane)
{
OutResult.Planes.Add(InFarPlane);
}
else if(ViewProjectionMatrix.GetFrustumFarPlane(Temp))
{
OutResult.Planes.Add(Temp);
}
OutResult.Init();
}
bool UBillboardComponent::ComponentIsTouchingSelectionFrustum(const FConvexVolume& InFrustum, const FEngineShowFlags& ShowFlags, const bool bConsiderOnlyBSP, const bool bMustEncompassEntireComponent) const
{
AActor* Actor = GetOwner();
if (!bConsiderOnlyBSP && ShowFlags.BillboardSprites && Sprite != nullptr && Actor != nullptr)
{
const float Scale = ComponentToWorld.GetMaximumAxisScale();
const float MaxExtent = FMath::Max(Sprite->GetSizeX(), Sprite->GetSizeY());
const FVector Extent = Scale * MaxExtent * FVector(0.5f, 0.5f, 0.0f);
bool bIsFullyContained;
if (InFrustum.IntersectBox(Actor->GetActorLocation(), Extent, bIsFullyContained))
{
return !bMustEncompassEntireComponent || bIsFullyContained;
}
}
return false;
}
