HTML and CSS Reference
In-Depth Information
window.addEventListener('load', eventWindowLoaded, false);
function eventWindowLoaded() {
canvasApp();
}
function canvasSupport () {
return Modernizr.canvas;
}
function canvasApp() {
if (!canvasSupport()) {
return;
}
function drawScreen () {
context.fillStyle = '#EEEEEE';
context.fillRect(0, 0, theCanvas.width, theCanvas.height);
//Box
context.strokeStyle = '#000000';
context.strokeRect(1, 1, theCanvas.width-2, theCanvas.height-2);
ball.x = circle.centerX + Math.cos(circle.angle) * circle.radius;
ball.y = circle.centerY + Math.sin(circle.angle) * circle.radius;
circle.angle += ball.speed;
context.fillStyle = "#000000";
context.beginPath();
context.arc(ball.x,ball.y,15,0,Math.PI*2,true);
context.closePath();
context.fill();
}
var radius = 100;
var circle = {centerX:250, centerY:250, radius:125, angle:0}
var ball = {x:0, y:0,speed:.1};
theCanvas = document.getElementById("canvasOne");
context = theCanvas.getContext("2d");
setInterval(drawScreen, 33);
}
</script>
