window.addEventListener("load", init);
function init() {
var stage = new createjs.Stage("myCanvas");
//
var ball = new createjs.Shape();
ball.graphics.beginFill('#888888').drawCircle(0, 0, 10);
stage.addChild(ball);
//
var angle = 0;
var centerX = stage.canvas.width / 2;
var centerY = stage.canvas.height / 2;
var radius = 100;
var speed = .01;
// 時間経過
createjs.Ticker.addEventListener("tick", handleTick);
function handleTick() {
ball.x = centerX + Math.cos(angle) * radius;
ball.y = centerY + Math.sin(angle) * radius;
angle += speed;
stage.update(); // 画面更新
}
//
var bg = new createjs.Shape();
bg.graphics.setStrokeStyle(1).beginStroke("LightGray").drawCircle(centerX, centerY, radius);
stage.addChildAt(bg, 0);
createjs.Ticker.timingMode = createjs.Ticker.RAF;
}
