New answers tagged projection
The short answer is that the standard perspective projection has a side effect of focusing Z resolution near the camera, which is actually beneficial. A perspective projection turns out to be linear in 1/Z rather than Z, meaning that there are very large changes in Z near to the camera, but smaller changes as the distance increases. Here's an article ...
He too those numbers, because of the same reason some people uses 800 * 600 for computers. It is one of the smallest screen size wich can be found on the market. It's just easier to handle, than something like 1600 * 900.
Top 50 recent answers are included