canvas切换多种酷炫的动画特效

查看演示 下载资源 下载积分： 20 积分

关注公众号，免费赠送安装视频教程、环境和学习视频，后面会不断更新。

var Emitter = function(x, y, settings) {

    /* the emitter's position */

    this.pos = {

        x: x,
        y: y
    };

    /* set specified values */

    this.settings = settings;

    /* How often the emitter needs to create a particle in milliseconds */

    this.emission_delay = 1000 / settings.emission_rate;

    /* we'll get to these later */

    this.last_update = 0;

    this.last_emission = 0;

    /* the emitter's particle objects */

    this.particles = [];

    /* particle position settings */

    this.position_vary = this.settings.position_range || false;

    this.min_position = this.settings.min_position || {x: 0, y: 0};
};