海葵没出来
老师海葵没出来,为什么你的海葵就出来了呢?
老师海葵没出来,为什么你的海葵就出来了呢?
2016-06-16
var aneObj = function(){
this.x = [];
this.h = [];
}
aneObj.prototype.num = 50;
aneObj.prototype.init = function(){
for (var i = 0; i < this.num; i++) {
this.x[i] = i * 16 + Math.random();
this.h[i] = 200 + Math.random() * 50;
};
}
aneObj.prototype.draw = function(){
ctx2.save();
ctx2.globalAlpha = 0.6;
ctx2.lineWidth = 20;
ctx2.lineCap = 'round';
ctx2.strokeStyle = '#3b154e';
for (var i = 0; i < this.num; i++) {
// beginPath,moveTo,lineTo,stroke,strokeStyle,lineWidth,lineCap,globalAlpha
ctx2.beginPath();
ctx2.moveTo(this.x[i], canHeight);
ctx2.lineTo(this.x[i], canHeight - this.h[i]);
ctx2.stroke();
};
ctx2.restore();
}举报