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MDN breakout step 2

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Dan Buch 2016-12-31 23:00:16 -05:00
parent 8b0863984f
commit af3e1f0b24
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GPG Key ID: FAEF12936DD3E3EC
1 changed files with 18 additions and 15 deletions
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mdn-breakout/index.html
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@ -13,24 +13,27 @@ canvas { background: #eee; display: block; margin: 0 auto; }
<script>
var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");
var x = canvas.width/2;
var y = canvas.height-30;
var dx = 2;
var dy = -2;
ctx.beginPath();
ctx.rect(20, 40, 50, 50);
ctx.fillStyle = "#FF0000";
ctx.fill();
ctx.closePath();
function drawBall() {
ctx.beginPath();
ctx.arc(x, y, 10, 0, Math.PI*2);
ctx.fillStyle = "#0095DD";
ctx.fill();
ctx.closePath();
}
ctx.beginPath();
ctx.arc(240, 160, 20, 0, Math.PI*2, false);
ctx.fillStyle = "green";
ctx.fill();
ctx.closePath();
function draw() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
drawBall();
x += dx;
y += dy;
}
ctx.beginPath();
ctx.rect(160, 10, 100, 40);
ctx.strokeStyle = "rgba(0, 0, 255, 0.5)";
ctx.stroke();
ctx.closePath();
setInterval(draw, 10);
</script>
</body>
</html>