Opencv virtually camera rotating/translating for bird's eye view?

That is the code I would advise (it's one of mine), to my mind it answers a lot of your questions, If you want the distance, I would precise that it is in the Z matrix, the (4,3) coefficient.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.