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copied!<p>C++ isn't naturally suited for FRP; any libraries you use (<a href="http://www.boost.org/doc/libs/1_48_0/libs/phoenix/doc/html/index.html" rel="noreferrer">Boost.Phoenix</a> is a good one) will carry some overhead that you most likely don't want to deal with in a commercial 3D game.</p> <p>Not only that, but FRP isn't a very well developed technique for games, not even in Haskell, afaik; do you want to make a game or do you want to develop a technique for making games?</p> <p>Component-based entity systems have been around for quite a while and are a proven concept. They do have their limitations, most notably, how do components communicate with each other? — one solution is to have two types of components, attributes and behaviours; the latter can access any attribute, but they cannot access each other.</p> <p>If you want to make a game, go with CBS. If you want to help develop FRP in games, then do that.</p> <p>Btw, you're so very wrong to say that 2D games have simple engines. :)</p> <hr> <p><strong>2014 Update</strong></p> <p>A new language has since appeared that make extensive use of functional reactive techniques and is aimed at web development, called <a href="http://elm-lang.org/" rel="noreferrer">Elm</a>. It is very similar to Haskell and is supported by <a href="http://prezi.com" rel="noreferrer">Prezi</a>, afaik. The language designer had a pretty good <a href="http://www.infoq.com/presentations/elm-reactive-programming" rel="noreferrer">presentation</a> in which he made a small game using FRP. Anyone interested in how FRP should be handled might want to look at that video.</p>

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