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var dx = 1, dy = 1.3, frames = 1, e, stop = false, score = 0, foul = 0,
field = new Box('white','black','black'),
score_block = field.addblock(20,10,20,20).text("0").style("color","grey")
.style("font-size","5em"),
foul_block = field.addblock(70,10,20,20).text("0").style("color","tomato")
.style("font-size","5em"),
ball = field.addblock(10,0,5,5,"grey"),
bat = field.addblock(45,95,20,5,"darkgrey");
preload_sound("pong.mp3");
preload_sound("bat.mp3");
preload_sound("miss.mp3");
on(document,"keydown",function(e) {
switch (e.keyCode)
{
case keys.LEFT_ARROW: if (bat.left >= 3) {bat.move(-3,0)}; break;
case keys.RIGHT_ARROW: if (bat.left <= 100 - 22) {bat.move(3,0)}; break;
case keys.ESCAPE: stop = true; break;
}
});
function collide() {
return ball.top >= bat.top-5 && ball.left >= bat.left && ball.left < bat.left + 20;
}
function bounce(d) {
play("pong.mp3");
return -d;
}
while (1) {
await(17*frames);
ball.move(dx,dy);
dx = ball.left < 1 || ball.left > 94? bounce(dx) : dx;
dy = ball.top < 1 || ball.top > 94 ? bounce(dy) : dy;
if (collide() && dy > 0) {
dy = -dy;
play("bat.mp3");
score_block.text(++score);
}
else if (ball.top > 94) {
foul_block.text(++foul);
play("miss.mp3");
}
if (stop) {
break;
}
}