Fixed the issue with switching tab causing the ball to go out of boundaries

Abhinav Sarkar 10 years ago
parent 25ab05ede0
commit a5aa5964cd

@ -8,13 +8,14 @@
<div>FPS: <span id="fps"></span></div>
<div>Position: <span id="pos"></span></div>
<div>Velocity: <span id="vel"></span></div>
<svg style="width: 300px; height: 200px; border: 1px black solid" id="canvas">
<circle id="ball" r="5" cx="5" cy="100"/>
<div>Frame: <span id="frame"></span></div>
<div>FPS: <span id="fps"></span></div>
<div>Position: <span id="pos"></span></div>
<div>Velocity: <span id="vel"></span></div>
<svg style="width: 600px; height: 400px; border: 1px black solid" id="canvas">
<circle id="ball" r="5" cx="5" cy="100"/>
<!-- pointing to cljsbuild generated js file -->
<script src="js/frpong.js"></script>
<script type="text/javascript">frpong.core.init()</script>

@ -1,5 +1,5 @@
(ns frpong.core
(:require [frpong.helpers :as h]
(:require [frpong.helpers :as h :refer [log]]
[cljs.core.async :as async
:refer [<! >! chan put! close! sliding-buffer dropping-buffer timeout]]
[domina :as dom :refer [log]]
@ -32,6 +32,16 @@
(defn abs [x] (.abs js/Math x))
(defn tick-chan [frame-chan]
(let [c (chan)]
(loop [prev (<! frame-chan)]
(let [t (<! frame-chan)]
(when (< t (* 10 prev))
(>! c t))
(recur t))))
(defn positioner [tick-chan vel-chan pos-chan-in pos-chan-out]
(let [tick (<! tick-chan)
@ -65,7 +75,7 @@
(dom/set-attr! (dom/by-id "ball") "cy" y))))
(defn game-setup [width height padding frame-chan pos-chan vel-chan]
(let [[tick-chan-pos tick-chan-collsion] (h/dup-chan (h/diff-chan frame-chan))
(let [[tick-chan-pos tick-chan-collsion] (h/dup-chan (tick-chan (h/diff-chan frame-chan)))
[pos-chan-pos pos-chan-render pos-chan-collision] (h/multiplex pos-chan 3)
[vel-chan-pos vel-chan-collision vel-chan-render] (h/multiplex vel-chan 3)]
(positioner tick-chan-pos vel-chan-pos pos-chan-pos pos-chan)
@ -85,14 +95,17 @@
(defn ^:export init []
(let [frame-chan (h/frame-chan)
[frame-chan-fps frame-chan-game] (h/dup-chan frame-chan)
[frame-chan-fps frame-chan-game frame-chan-count] (h/multiplex frame-chan 3)
fps-chan (h/map-chan #(/ 1000 %) (h/diff-chan frame-chan-fps))
frame-count-chan (h/counting-chan frame-chan-count)
width 300
height 200
width 600
height 400
padding 5
init-pos [5 100]
init-vel [0.2 0.22]]
(go-loop (dom/set-text! (dom/by-id "fps") (<! fps-chan)))
(dom/set-text! (dom/by-id "fps") (<! fps-chan))
(dom/set-text! (dom/by-id "frame") (<! frame-count-chan)))
(game-init width height padding init-pos init-vel frame-chan-game)))

@ -9,6 +9,8 @@
(defn now []
(.valueOf (js/Date.)))
(defn log [s] (.log js/console s))
(defn put-all! [cs x]
(doseq [c cs]
(put! c x)))
@ -178,3 +180,13 @@
(>! c (- ts start))
(recur ts)))))
(defn dropping-chan [source n]
(let [c (chan)]
(loop [count 0]
(if (= count 0)
(>! c (<! source))
(<! source))
(recur (rem (inc count) n))))