The distinction is hazy, however. We’ll look at level of detail techniques that are very much top down, while most of the character AI is bottom up. A good AI developer will mix and match any reliable techniques that get the job done, regardless of the approach. That pragmatic approach is the one we always follow. So in this book, we avoid using agent-based terminology. We prefer to talk about game characters in general, however they are structured.
The distinction between top down and bottom to top perspectives is worth considering
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