html5+CSS3心形动画跟随鼠标光标运动特效

代码片段：

this.update = function () {
var lastPoint = { x: _this.x, y: _this.y };
// 随着时间移动点
_this.radians = _this.velocity;

// 拖动效果
_this.lastMouse.x = (mouse.x - _this.lastMouse.x) * 0.05;
_this.lastMouse.y = (mouse.y - _this.lastMouse.y) * 0.05;

// 圆周运动＃＃＃ _this.distanceFromCenter.x = _this.prevDistanceFromCenter.x Math.sin(_this.radians) * 100;
_this.distanceFromCenter.y = _this.prevDistanceFromCenter.x Math.sin(_this.radians) * 100;

_this.x = _this.lastMouse.x Math.cos(_this.radians) * _this.distanceFromCenter.x;
_this.y = _this.lastMouse.y Math.sin(_this.radians) * _this.distanceFromCenter.y;

_this.draw(lastPoint);
};