var y = p[count]['y']+p[count]['h']*Math.random();
count++;
if(count>=p.length)
count=0;
var color = colors[Math.floor(i%colors.length)];
var alpha = 0.2 + Math.random()*0.5;
circle.alpha = alpha;
circle.radius = r;
circle.graphics.beginFill(color).drawCircle(0, 0, r);
circle.x = x;
circle.y = y;
circles.push(circle);
stage.addChild(circle);
circle.movement = 'float';
tweenCircle(circle);
}
}
initCircles
然后再讲显示特效Failed的createText（）。先将FAILED的text显示在textstage里，然后ctx.getImageData.data获取像素数据，并以此来为每个小圆点定义位置。
function createText(t) {
curText=t;
var fontSize = 500/(t.length);
if (fontSize > 80) fontSize = 80;
text.text = t;
text.font = "900 "+fontSize+"px 'Source Sans Pro'";
text.textAlign = 'center';
text.x = TETRIS_COLS*CELL_SIZE/2;
text.y = 0;
textStage.addChild(text);
textStage.update(); var ctx = document.getElementById('text').getContext('2d');
var pix = ctx.getImageData(0,0,600,200).data;
textPixels = [];
for (var i = pix.length; i >= 0; i -= 4) {
if (pix[i] != 0) {
var x = (i / 4) % 600;
var y = Math.floor(Math.floor(i/600)/4);
if((x && x%8 == 0) && (y && y%8 == 0)) textPixels.push({x: x, y: y});
}
}
formText();
textStage.clear();//清楚text的显示
}
CreateText
跟着代码的节奏走，我们现在来到了formtext.
function formText() {
for(var i= 0, l=textPixels.length; i<l; i++) {
circles[i].originX = offsetX + textPixels[i].x;
circles[i].originY = offsetY + textPixels[i].y;
tweenCircle(circles[i], 'in');
}
textFormed = true;
if(textPixels.length < circles.length) {
for(var j = textPixels.length; j<circles.length; j++) {
circles[j].tween = TweenLite.to(circles[j], 0.4, {alpha: 0.1});
}
}
}formtext
explode()就是讲已组成字的小圆点给重新遣散。
动画实现是使用了tweenlite.
function tweenCircle(c, dir) {
if(c.tween) c.tween.kill();
if(dir == 'in') {
/*TweenLite.to 改变c实例的x坐标，y坐标，使用easeInOut弹性函数，透明度提到1，改变大小,radius，总用时0.4s*/
c.tween = TweenLite.to(c, 0.4, {x: c.originX, y: c.originY, ease:Quad.easeInOut, alpha: 1, radius: 5, scaleX: 0.4, scaleY: 0.4, onComplete: function() {
c.movement = 'jiggle';/*轻摇*/
tweenCircle(c);
}});
} else if(dir == 'out') {
c.tween = TweenLite.to(c, 0.8, {x: window.innerWidth*Math.random(), y: window.innerHeight*Math.random(), ease:Quad.easeInOut, alpha: 0.2 + Math.random()*0.5, scaleX: 1, scaleY: 1, onComplete: function() {
c.movement = 'float';
