VTK Delete () and Data Deletion

Question

I was looking at VTK 5.4.2 code and cannot figure out how the Delete () function works. I mean, the Delete () function is located in vtkObjectBase and is virtual, but through what chain of commands does the destructor of the vtkDoubleArray class execute (for example)?

Regards,

mightydodol

Answer 1

vtkObjectBase Delete () will call UnRegisterInternal. If the ReferenceCount classes are less than or equal to 1, it will call delete on the class.

Answer 2

This is a kind of garbage collector.

If you look at vtkObjectBase, there are three functions: Register, UnRegister and Delete. These are the ones that do reference counting.

, . , . ref. count 0, . New(), , 0. , , , ref. . () - UnRegister().

(, vtkPolyData ), , (), . , () , .

, UnRegisters, (, vtkRenderer vtkRenderWindow), .

Answer 3

Also: you do not need to call Delete () often. You can almost always use vtkSmartPointer.