You need a check in the loop to see if the player wants to end the game.
Clojure doesn't have a break statement like Java so you created a infinite loop
that will never end. To make sure the game ends you need to have a base case.
Example of a main game loop in clojure:
(loop [game-state initial-state]
(if (game-ends? game-state)
(close-game game-state)
(recur (render (logic game-state)))))
You should also look into records to store the game's state. Records are
faster than hash maps and you have polymorphism with protocols. Be careful of
the lazy functions in clojure like map. It will only execute when you ask a
value for it.
Matt Hoyt
________________________________
From: Dennis Haupt <d.haup...@googlemail.com>
To: clojure@googlegroups.com
Sent: Saturday, September 24, 2011 2:36 PM
Subject: beginner question
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in java, i would start coding a game with a loop like this:
while (true) {
logic();
render();
}
i would store the current state of the world in an object containing
the complete data of the whole game and update its values in each
iteration.
how would i do this in clojure?
the outer loop could look like
(def next [oldstate] (....)) <- input = current game, return value =
next iteration
(loop [world initalState] (recur (next world))) // <- the loop
but how would be world look like? the "best" (most trivial) thing that
i could think of is for it to be a map which is passed along several
transform functions, for example
(def playerHealthRegen [world] (...)) <- input = world (a map), output
= a new map with a new entry at key "playerhealth"
each function would then return a slightly modified version of the
world, and at the end, i'll have my completely new state.
is that about right? or is there a completely different way i overlooked?
- --
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