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if("now"===n)i=this._time;else{if("relative"!==n)throw new Error('Invalid value for the "when" parameter');var r=this._runners[t.id];r&&(i=r.start+e,e=0)}return t.unschedule(),t.timeline(this),t.time(-e),this._startTime=i+t.duration()+e,this._runners[t.id]={persist:this.persist(),runner:t,start:i},this._order.push(t.id),this._continue(),this},unschedule:function(t){var e=this._order.indexOf(t.id);return e<0?this:(delete this._runners[t.id],this._order.splice(e,1),t.timeline(null),this)},play:function(){return this._paused=!1,this._continue()},pause:function(){return this._nextFrame=null,this._paused=!0,this},stop:function(){return this.seek(-this._time),this.pause()},finish:function(){return this.seek(1/0),this.pause()},speed:function(t){return null==t?this._speed:(this._speed=t,this)},reverse:function(t){var e=this.speed();if(null==t)return this.speed(-e);var n=Math.abs(e);return this.speed(t?n:-n)},seek:function(t){return this._time+=t,this._continue()},time:function(t){return null==t?this._time:(this._time=t,this)},persist:function(t){return null==t?this._persist:(this._persist=t,this)},source:function(t){return null==t?this._timeSource:(this._timeSource=t,this)},_step:function(){if(!this._paused){var t=this._timeSource(),e=t-this._lastSourceTime,n=this._speed*e+(this._time-this._lastStepTime);this._lastSourceTime=t,this._time+=n,this._lastStepTime=this._time;for(var i=!1,r=0,s=this._order.length;r<s;r++){var o=this._runners[this._order[r]],a=o.runner,h=n,u=this._time-o.start;if(u<0)i=!0;else if(u<h&&(h=u),a.active()){var l=a.step(h).done;if(l){if(!0!==o.persist){var c=a.duration()-a.time()+this._time;c+this._persist<this._time&&(delete this._runners[this._order[r]],this._order.splice(r--,1)&&--s,a.timeline(null))}}else i=!0}}return this._nextFrame=i?q.Animator.frame(this._step.bind(this)):null,this}},_continue:function(){return this._paused?this:(this._nextFrame||(this._nextFrame=q.Animator.frame(this._step.bind(this))),this)},active:function(){return!!this._nextFrame}},parent:q.Element,construct:{timeline:function(){return this._timeline=this._timeline||new q.Timeline,this._timeline}}}),q.Stepper=q.invent({create:function(){}}),q.Ease=q.invent({inherit:q.Stepper,create:function(t){q.Stepper.call(this,t),this.ease=q.easing[t||q.defaults.timeline.ease]||t},extend:{step:function(t,e,n){return"number"!=typeof t?n<1?t:e:t+(e-t)*this.ease(n)},done:function(t,e){return!1}}}),q.easing={"-":function(t){return t},"<>":function(t){return-Math.cos(t*Math.PI)/2+.5},">":function(t){return Math.sin(t*Math.PI/2)},"<":function(t){return 1-Math.cos(t*Math.PI/2)},bezier:function(t,e,n,i){return function(t){}}},q.Controller=q.invent({inherit:q.Stepper,create:function(t){q.Stepper.call(this,t),this.stepper=t},extend:{step:function(t,e,n,i){return this.stepper(t,e,n,i)},done:function(t){return t.done}}}),q.Spring=q.invent({inherit:q.Controller,create:function(t,e){this.duration(t||500).overshoot(e||0)},extend:{step:function(t,e,n,i){if("string"==typeof t)return t;if(i.done=n===1/0,n===1/0)return e;if(0===n)return t;n>100&&(n=16),n/=1e3;var r=i.velocity||0,s=-this.d*r-this.k*(t-e),o=t+r*n+s*n*n/2;return i.velocity=r+s*n,i.done=Math.abs(e-o)+Math.abs(r)<.002,i.done?e:o},duration:R("_duration",I),overshoot:R("_overshoot",I)}}),q.PID=q.invent({inherit:q.Controller,create:function(t,e,n,i){q.Controller.call(this),t=null==t?.1:t,e=null==e?.01:e,n=null==n?0:n,i=null==i?1e3:i,this.p(t).i(e).d(n).windup(i)},extend:{step:function(t,e,n,i){if("string"==typeof t)return t;if(i.done=n===1/0,n===1/0)return e;if(0===n)return t;var r=e-t,s=(i.integral||0)+r*n,o=(r-(i.error||0))/n,a=this.windup;return!1!==a&&(s=Math.max(-a,Math.min(s,a))),i.error=r,i.integral=s,i.done=Math.abs(r)<.001,i.done?e:t+(this.P*r+this.I*s+this.D*o)},windup:R("windup"),p:R("P"),i:R("I"),d:R("D")}}),q});
|
