Why does the derived class condition meet or return a null pointer？？

marlon.ma · January 19, 2023, 2:36am

auto maptocolor=vtkImageMapToWindowLevelColors::SafeDownCast(temp);

the temp

Paulo_Carvalho · January 20, 2023, 2:41pm

Hello,

Can you, please, post the code that declares the derived class?

best,

Paulo

marlon.ma · February 6, 2023, 8:16am

thank you ,I know the I know where I am wrong, and I have a wrong understanding of downward conversion, but now I have understood.