Added to() method in the SVG.FX

6 files changed, 234 insertions, 200 deletions

diff --git a/README.md b/README.md
index a5975bd..d970885 100644
--- a/README.md
+++ b/README.md
@@ -640,6 +640,19 @@ rect.animate(3000).move(100, 100).during(function(pos, morph) {
 })
 ```
 
+### Controlling animations externally
+Say you want to control the position of an animation with an external event than the `to()` method will proove very useful:
+
+```javascript
+var animate = draw.rect(100, 100).move(50, 50).animate('=').move(200, 200)
+
+document.onmousemove = function(event) {
+  animate.to(event.clientX / 1000)
+}
+```
+
+In order to be able use the `to()` method the duration of the animation should be set to `'='`. The value passed as the first argument of `to()` should be a number between `0` and `1`, `0` being the beginning of the animation and `1` being the end. Note that any values below `0` and above `1` will be normalized.
+
 
 ### After animation callback
 Finally, you can add callback methods using `after()`:
diff --git a/Rakefile b/Rakefile
index c378745..03e72d3 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,4 +1,4 @@
-SVGJS_VERSION = '0.18'
+SVGJS_VERSION = '0.19'
 
 # all available modules in the correct loading order
 MODULES = %w[ svg regex default color viewbox bbox rbox element container fx event group arrange defs mask clip pattern gradient doc shape rect ellipse line poly path plotable image text nested sugar ]
diff --git a/dist/svg.js b/dist/svg.js
index fa929a3..cac039e 100644
--- a/dist/svg.js
+++ b/dist/svg.js
@@ -1,4 +1,4 @@
-/* svg.js v0.18 - svg regex default color viewbox bbox rbox element container fx event group arrange defs mask clip pattern gradient doc shape rect ellipse line poly path plotable image text nested sugar - svgjs.com/license */
+/* svg.js v0.19 - svg regex default color viewbox bbox rbox element container fx event group arrange defs mask clip pattern gradient doc shape rect ellipse line poly path plotable image text nested sugar - svgjs.com/license */
 ;(function() {
 
   this.SVG = function(element) {
@@ -919,7 +919,9 @@
   SVG.extend(SVG.FX, {
     // Add animation parameters and start animation
     animate: function(d, ease, delay) {
-      var fx = this
+      var akeys, tkeys, skeys, key
+        , element = this.target
+        , fx = this
       
       /* dissect object if one is passed */
       if (typeof d == 'object') {
@@ -927,113 +929,122 @@
         ease = d.ease
         d = d.duration
       }
-      
-      /* delay animation */
-      this.timeout = setTimeout(function() {
-        
-        /* ensure default duration and easing */
-        d = d == null ? 1000 : d
-        ease = ease || '<>'
-        
-        var akeys, tkeys, skeys
-          , interval  = 1000 / 60
-          , element   = fx.target
-          , start     = new Date().getTime()
-          , finish    = start + d
-  
-        /* start animation */
-        fx.interval = setInterval(function(){
-          // This code was borrowed from the emile.js micro framework by Thomas Fuchs, aka MadRobby.
-          var i, key
-            , time = new Date().getTime()
-            , pos = time > finish ? 1 : (time - start) / d
-  
-          /* collect attribute keys */
-          if (akeys == null) {
-            akeys = []
-            for (key in fx.attrs)
-              akeys.push(key)
-          }
   
-          /* collect transformation keys */
-          if (tkeys == null) {
-            tkeys = []
-            for (key in fx.trans)
-              tkeys.push(key)
-          }
+      /* ensure default duration and easing */
+      d = d == null ? 1000 : d
+      ease = ease || '<>'
   
-          /* collect style keys */
-          if (skeys == null) {
-            skeys = []
-            for (key in fx.styles)
-              skeys.push(key)
-          }
+      /* process values */
+      fx.to = function(pos) {
+        var i
   
-          /* apply easing */
-          pos = ease == '<>' ?
-            (-Math.cos(pos * Math.PI) / 2) + 0.5 :
-          ease == '>' ?
-            Math.sin(pos * Math.PI / 2) :
-          ease == '<' ?
-            -Math.cos(pos * Math.PI / 2) + 1 :
-          ease == '-' ?
-            pos :
-          typeof ease == 'function' ?
-            ease(pos) :
-            pos
-  
-          /* run all x-position properties */
-          if (fx._x)
-            element.x(fx._at(fx._x, pos))
-          else if (fx._cx)
-            element.cx(fx._at(fx._cx, pos))
-  
-          /* run all y-position properties */
-          if (fx._y)
-            element.y(fx._at(fx._y, pos))
-          else if (fx._cy)
-            element.cy(fx._at(fx._cy, pos))
-  
-          /* run all size properties */
-          if (fx._size)
-            element.size(fx._at(fx._size.width, pos), fx._at(fx._size.height, pos))
-  
-          /* run all viewbox properties */
-          if (fx._viewbox)
-            element.viewbox(
-              fx._at(fx._viewbox.x, pos)
-            , fx._at(fx._viewbox.y, pos)
-            , fx._at(fx._viewbox.width, pos)
-            , fx._at(fx._viewbox.height, pos)
-            )
-  
-          /* animate attributes */
-          for (i = akeys.length - 1; i >= 0; i--)
-            element.attr(akeys[i], fx._at(fx.attrs[akeys[i]], pos))
-  
-          /* animate transformations */
-          for (i = tkeys.length - 1; i >= 0; i--)
-            element.transform(tkeys[i], fx._at(fx.trans[tkeys[i]], pos))
-  
-          /* animate styles */
-          for (i = skeys.length - 1; i >= 0; i--)
-            element.style(skeys[i], fx._at(fx.styles[skeys[i]], pos))
-  
-          /* callback for each keyframe */
-          if (fx._during)
-            fx._during.call(element, pos, function(from, to) {
-              return fx._at({ from: from, to: to }, pos)
-            })
+        /* normalise pos */
+        pos = pos < 0 ? 0 : pos > 1 ? 1 : pos
   
-          /* finish off animation */
-          if (time > finish) {
-            clearInterval(fx.interval)
-            fx._after ? fx._after.apply(element, [fx]) : fx.stop()
-          }
+        /* collect attribute keys */
+        if (akeys == null) {
+          akeys = []
+          for (key in fx.attrs)
+            akeys.push(key)
+        }
   
-        }, d > interval ? interval : d)
-        
-      }, delay || 0)
+        /* collect transformation keys */
+        if (tkeys == null) {
+          tkeys = []
+          for (key in fx.trans)
+            tkeys.push(key)
+        }
+  
+        /* collect style keys */
+        if (skeys == null) {
+          skeys = []
+          for (key in fx.styles)
+            skeys.push(key)
+        }
+  
+        /* apply easing */
+        pos = ease == '<>' ?
+          (-Math.cos(pos * Math.PI) / 2) + 0.5 :
+        ease == '>' ?
+          Math.sin(pos * Math.PI / 2) :
+        ease == '<' ?
+          -Math.cos(pos * Math.PI / 2) + 1 :
+        ease == '-' ?
+          pos :
+        typeof ease == 'function' ?
+          ease(pos) :
+          pos
+  
+        /* run all x-position properties */
+        if (fx._x)
+          element.x(fx._at(fx._x, pos))
+        else if (fx._cx)
+          element.cx(fx._at(fx._cx, pos))
+  
+        /* run all y-position properties */
+        if (fx._y)
+          element.y(fx._at(fx._y, pos))
+        else if (fx._cy)
+          element.cy(fx._at(fx._cy, pos))
+  
+        /* run all size properties */
+        if (fx._size)
+          element.size(fx._at(fx._size.width, pos), fx._at(fx._size.height, pos))
+  
+        /* run all viewbox properties */
+        if (fx._viewbox)
+          element.viewbox(
+            fx._at(fx._viewbox.x, pos)
+          , fx._at(fx._viewbox.y, pos)
+          , fx._at(fx._viewbox.width, pos)
+          , fx._at(fx._viewbox.height, pos)
+          )
+  
+        /* animate attributes */
+        for (i = akeys.length - 1; i >= 0; i--)
+          element.attr(akeys[i], fx._at(fx.attrs[akeys[i]], pos))
+  
+        /* animate transformations */
+        for (i = tkeys.length - 1; i >= 0; i--)
+          element.transform(tkeys[i], fx._at(fx.trans[tkeys[i]], pos))
+  
+        /* animate styles */
+        for (i = skeys.length - 1; i >= 0; i--)
+          element.style(skeys[i], fx._at(fx.styles[skeys[i]], pos))
+  
+        /* callback for each keyframe */
+        if (fx._during)
+          fx._during.call(element, pos, function(from, to) {
+            return fx._at({ from: from, to: to }, pos)
+          })
+      }
+      
+      if (typeof d === 'number') {
+        /* delay animation */
+        this.timeout = setTimeout(function() {
+          var interval  = 1000 / 60
+            , start     = new Date().getTime()
+            , finish    = start + d
+    
+          /* start animation */
+          fx.interval = setInterval(function(){
+            // This code was borrowed from the emile.js micro framework by Thomas Fuchs, aka MadRobby.
+            var time = new Date().getTime()
+              , pos = time > finish ? 1 : (time - start) / d
+    
+            /* process values */
+            fx.to(pos)
+    
+            /* finish off animation */
+            if (time > finish) {
+              clearInterval(fx.interval)
+              fx._after ? fx._after.apply(element, [fx]) : fx.stop()
+            }
+    
+          }, d > interval ? interval : d)
+          
+        }, delay || 0)
+      }
       
       return this
     }
diff --git a/dist/svg.min.js b/dist/svg.min.js
index 1666cca..d4ad94a 100644
--- a/dist/svg.min.js
+++ b/dist/svg.min.js
@@ -1 +1 @@
-(function(){if(this.SVG=function(t){return SVG.supported?new SVG.Doc(t):void 0},this.svg=function(t){return console.warn("WARNING: svg() is deprecated, please use SVG() instead."),SVG(t)},SVG.ns="http://www.w3.org/2000/svg",SVG.xlink="http://www.w3.org/1999/xlink",SVG.did=1e3,SVG.eid=function(t){return"Svgjs"+t.charAt(0).toUpperCase()+t.slice(1)+SVG.did++},SVG.create=function(t){var e=document.createElementNS(this.ns,t);return e.setAttribute("id",this.eid(t)),e},SVG.extend=function(){var t,e,i,n;for(t=[].slice.call(arguments),e=t.pop(),n=t.length-1;n>=0;n--)if(t[n])for(i in e)t[n].prototype[i]=e[i]},SVG.get=function(t){var e=document.getElementById(t);return e?e.instance:void 0},SVG.supported=function(){return!!document.createElementNS&&!!document.createElementNS(SVG.ns,"svg").createSVGRect}(),!SVG.supported)return!1;SVG.regex={test:function(t,e){return this[e].test(t)},unit:/^([\d\.]+)([a-z%]{0,2})$/,hex:/^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i,rgb:/rgb\((\d+),(\d+),(\d+)\)/,isHex:/^#[a-f0-9]{3,6}$/i,isRgb:/^rgb\(/,isCss:/[^:]+:[^;]+;?/,isStyle:/^font|text|leading|cursor/,isBlank:/^(\s+)?$/,isNumber:/^-?[\d\.]+$/},SVG.defaults={matrix:"1,0,0,1,0,0",attrs:{"fill-opacity":1,"stroke-opacity":1,"stroke-width":0,fill:"#000",stroke:"#000",opacity:1,x:0,y:0,cx:0,cy:0,width:0,height:0,r:0,rx:0,ry:0,offset:0},trans:function(){return{x:0,y:0,scaleX:1,scaleY:1,rotation:0,skewX:0,skewY:0,matrix:this.matrix,a:1,b:0,c:0,d:1,e:0,f:0}}},SVG.Color=function(t){var e;this.r=0,this.g=0,this.b=0,"string"==typeof t?SVG.regex.isRgb.test(t)?(e=SVG.regex.rgb.exec(t.replace(/\s/g,"")),this.r=parseInt(e[1]),this.g=parseInt(e[2]),this.b=parseInt(e[3])):SVG.regex.isHex.test(t)&&(e=SVG.regex.hex.exec(this._fullHex(t)),this.r=parseInt(e[1],16),this.g=parseInt(e[2],16),this.b=parseInt(e[3],16)):"object"==typeof t&&(this.r=t.r,this.g=t.g,this.b=t.b)},SVG.extend(SVG.Color,{toString:function(){return this.toHex()},toHex:function(){return"#"+this._compToHex(this.r)+this._compToHex(this.g)+this._compToHex(this.b)},toRgb:function(){return"rgb("+[this.r,this.g,this.b].join()+")"},brightness:function(){return.3*(this.r/255)+.59*(this.g/255)+.11*(this.b/255)},_fullHex:function(t){return 4==t.length?["#",t.substring(1,2),t.substring(1,2),t.substring(2,3),t.substring(2,3),t.substring(3,4),t.substring(3,4)].join(""):t},_compToHex:function(t){var e=t.toString(16);return 1==e.length?"0"+e:e}}),SVG.Color.test=function(t){return t+="",SVG.regex.isHex.test(t)||SVG.regex.isRgb.test(t)},SVG.Color.isRgb=function(t){return t&&"number"==typeof t.r},SVG.ViewBox=function(t){var e,i,n,s,r=t.bbox(),o=(t.attr("viewBox")||"").match(/-?[\d\.]+/g);this.x=r.x,this.y=r.y,this.width=t.node.offsetWidth||t.attr("width"),this.height=t.node.offsetHeight||t.attr("height"),o&&(e=parseFloat(o[0]),i=parseFloat(o[1]),n=parseFloat(o[2]),s=parseFloat(o[3]),this.zoom=this.width/this.height>n/s?this.height/s:this.width/n,this.x=e,this.y=i,this.width=n,this.height=s),this.zoom=this.zoom||1},SVG.extend(SVG.ViewBox,{toString:function(){return this.x+" "+this.y+" "+this.width+" "+this.height}}),SVG.BBox=function(t){var e;if(this.x=0,this.y=0,this.width=0,this.height=0,t){try{e=t.node.getBBox()}catch(i){e={x:t.node.clientLeft,y:t.node.clientTop,width:t.node.clientWidth,height:t.node.clientHeight}}this.x=e.x+t.trans.x,this.y=e.y+t.trans.y,this.width=e.width*t.trans.scaleX,this.height=e.height*t.trans.scaleY}this.cx=this.x+this.width/2,this.cy=this.y+this.height/2},SVG.extend(SVG.BBox,{merge:function(t){var e=new SVG.BBox;return 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n,s,r,o,h=this.target,a=this;return"object"==typeof t&&(i=t.delay,e=t.ease,t=t.duration),t=null==t?1e3:t,e=e||"<>",a.to=function(t){var i;if(t=0>t?0:t>1?1:t,null==n){n=[];for(o in a.attrs)n.push(o)}if(null==s){s=[];for(o in a.trans)s.push(o)}if(null==r){r=[];for(o in a.styles)r.push(o)}for(t="<>"==e?-Math.cos(t*Math.PI)/2+.5:">"==e?Math.sin(t*Math.PI/2):"<"==e?-Math.cos(t*Math.PI/2)+1:"-"==e?t:"function"==typeof e?e(t):t,a._x?h.x(a._at(a._x,t)):a._cx&&h.cx(a._at(a._cx,t)),a._y?h.y(a._at(a._y,t)):a._cy&&h.cy(a._at(a._cy,t)),a._size&&h.size(a._at(a._size.width,t),a._at(a._size.height,t)),a._viewbox&&h.viewbox(a._at(a._viewbox.x,t),a._at(a._viewbox.y,t),a._at(a._viewbox.width,t),a._at(a._viewbox.height,t)),i=n.length-1;i>=0;i--)h.attr(n[i],a._at(a.attrs[n[i]],t));for(i=s.length-1;i>=0;i--)h.transform(s[i],a._at(a.trans[s[i]],t));for(i=r.length-1;i>=0;i--)h.style(r[i],a._at(a.styles[r[i]],t));a._during&&a._during.call(h,t,function(e,i){return a._at({from:e,to:i},t)})},"number"==typeof t&&(this.timeout=setTimeout(function(){var e=1e3/60,i=(new Date).getTime(),n=i+t;a.interval=setInterval(function(){var e=(new Date).getTime(),s=e>n?1:(e-i)/t;a.to(s),e>n&&(clearInterval(a.interval),a._after?a._after.apply(h,[a]):a.stop())},t>e?e:t)},i||0)),this},bbox:function(){return this.target.bbox()},attr:function(t,e){if("object"==typeof t)for(var i in t)this.attr(i,t[i]);else this.attrs[t]={from:this.target.attr(t),to:e};return this},transform:function(t,e){if(1==arguments.length){t=this.target._parseMatrix(t),delete t.matrix;for(e in t)this.trans[e]={from:this.target.trans[e],to:t[e]}}else{var i={};i[t]=e,this.transform(i)}return this},style:function(t,e){if("object"==typeof t)for(var i in t)this.style(i,t[i]);else this.styles[t]={from:this.target.style(t),to:e};return this},x:function(t){return this._x={from:this.target.x(),to:t},this},y:function(t){return this._y={from:this.target.y(),to:t},this},cx:function(t){return this._cx={from:this.target.cx(),to:t},this},cy:function(t){return this._cy={from:this.target.cy(),to:t},this},move:function(t,e){return this.x(t).y(e)},center:function(t,e){return this.cx(t).cy(e)},size:function(t,e){if(this.target instanceof SVG.Text)this.attr("font-size",t);else{var i=this.target.bbox();this._size={width:{from:i.width,to:t},height:{from:i.height,to:e}}}return this},viewbox:function(t,e,i,n){if(this.target instanceof SVG.Container){var s=this.target.viewbox();this._viewbox={x:{from:s.x,to:t},y:{from:s.y,to:e},width:{from:s.width,to:i},height:{from:s.height,to:n}}}return this},during:function(t){return this._during=t,this},after:function(t){return this._after=t,this},stop:function(){return clearTimeout(this.timeout),clearInterval(this.interval),this.attrs={},this.trans={},this.styles={},delete this._x,delete this._y,delete this._cx,delete this._cy,delete this._size,delete this._after,delete this._during,delete this._viewbox,this},_at:function(t,e){return"number"==typeof t.from?t.from+(t.to-t.from)*e:SVG.regex.unit.test(t.to)?this._unit(t,e):t.to&&(t.to.r||SVG.Color.test(t.to))?this._color(t,e):1>e?t.from:t.to},_unit:function(t,e){var i,n;return i=SVG.regex.unit.exec(t.from.toString()),n=parseFloat(i?i[1]:0),i=SVG.regex.unit.exec(t.to),n+(parseFloat(i[1])-n)*e+i[2]},_color:function(t,e){var i,n;return e=0>e?0:e>1?1:e,i=new SVG.Color(t.from),n=new SVG.Color(t.to),new SVG.Color({r:~~(i.r+(n.r-i.r)*e),g:~~(i.g+(n.g-i.g)*e),b:~~(i.b+(n.b-i.b)*e)}).toHex()}}),SVG.extend(SVG.Element,{animate:function(t,e,i){return(this.fx||(this.fx=new SVG.FX(this))).stop().animate(t,e,i)},stop:function(){return this.fx&&this.fx.stop(),this}}),["click","dblclick","mousedown","mouseup","mouseover","mouseout","mousemove","mouseenter","mouseleave","touchstart","touchend","touchmove","touchcancel"].forEach(function(t){SVG.Element.prototype[t]=function(e){var i=this;return this.node["on"+t]="function"==typeof 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this.siblings()[this.position()-1]},forward:function(){return this.parent.removeElement(this).put(this,this.position()+1)},backward:function(){this.parent.level();var t=this.position();return t>1&&this.parent.removeElement(this).add(this,t-1),this},front:function(){return this.parent.removeElement(this).put(this)},back:function(){return this.parent.level(),this.position()>1&&this.parent.removeElement(this).add(this,0),this}}),SVG.Defs=function(){this.constructor.call(this,SVG.create("defs"))},SVG.Defs.prototype=new SVG.Container,SVG.Mask=function(){this.constructor.call(this,SVG.create("mask"))},SVG.Mask.prototype=new SVG.Container,SVG.extend(SVG.Element,{maskWith:function(t){return this.mask=t instanceof SVG.Mask?t:this.parent.mask().add(t),this.attr("mask","url(#"+this.mask.attr("id")+")")}}),SVG.extend(SVG.Container,{mask:function(){return this.defs().put(new SVG.Mask)}}),SVG.Clip=function(){this.constructor.call(this,SVG.create("clipPath"))},SVG.Clip.prototype=new SVG.Container,SVG.extend(SVG.Element,{clipWith:function(t){return this.clip=t instanceof SVG.Clip?t:this.parent.clip().add(t),this.attr("clip-path","url(#"+this.clip.attr("id")+")")}}),SVG.extend(SVG.Container,{clip:function(){return this.defs().put(new SVG.Clip)}}),SVG.Pattern=function(){this.constructor.call(this,SVG.create("pattern"))},SVG.Pattern.prototype=new SVG.Container,SVG.extend(SVG.Pattern,{fill:function(){return"url(#"+this.attr("id")+")"}}),SVG.extend(SVG.Defs,{pattern:function(t,e,i){var n=this.put(new SVG.Pattern);return i(n),n.attr({x:0,y:0,width:t,height:e,patternUnits:"userSpaceOnUse"})}}),SVG.extend(SVG.Container,{pattern:function(t,e,i){return this.defs().pattern(t,e,i)}}),SVG.Gradient=function(t){this.constructor.call(this,SVG.create(t+"Gradient")),this.type=t},SVG.Gradient.prototype=new SVG.Container,SVG.extend(SVG.Gradient,{from:function(t,e){return"radial"==this.type?this.attr({fx:t+"%",fy:e+"%"}):this.attr({x1:t+"%",y1:e+"%"})},to:function(t,e){return"radial"==this.type?this.attr({cx:t+"%",cy:e+"%"}):this.attr({x2:t+"%",y2:e+"%"})},radius:function(t){return"radial"==this.type?this.attr({r:t+"%"}):this},at:function(t){return this.put(new SVG.Stop(t))},update:function(t){for(;this.node.hasChildNodes();)this.node.removeChild(this.node.lastChild);return t(this),this},fill:function(){return"url(#"+this.attr("id")+")"}}),SVG.extend(SVG.Defs,{gradient:function(t,e){var i=this.put(new SVG.Gradient(t));return e(i),i}}),SVG.extend(SVG.Container,{gradient:function(t,e){return this.defs().gradient(t,e)}}),SVG.Stop=function(t){this.constructor.call(this,SVG.create("stop")),this.update(t)},SVG.Stop.prototype=new SVG.Element,SVG.extend(SVG.Stop,{update:function(t){var e,i=["opacity","color"];for(e=i.length-1;e>=0;e--)null!=t[i[e]]&&this.style("stop-"+i[e],t[i[e]]);return this.attr("offset",(null!=t.offset?t.offset:this.attr("offset"))+"%")}}),SVG.Doc=function(t){this.parent="string"==typeof t?document.getElementById(t):t,this.constructor.call(this,"svg"==this.parent.nodeName?this.parent:SVG.create("svg")),this.attr({xmlns:SVG.ns,version:"1.1",width:"100%",height:"100%"}).attr("xlink",SVG.xlink,SVG.ns).defs(),"svg"!=this.parent.nodeName&&this.stage()},SVG.Doc.prototype=new SVG.Container,SVG.extend(SVG.Doc,{stage:function(){var t,e=this,i=document.createElement("div");return i.style.cssText="position:relative;height:100%;",e.parent.appendChild(i),i.appendChild(e.node),t=function(){"complete"===document.readyState?(e.style("position:absolute;"),setTimeout(function(){e.style("position:relative;"),e.parent.removeChild(e.node.parentNode),e.node.parentNode.removeChild(e.node),e.parent.appendChild(e.node),e.fixSubPixelOffset(),SVG.on(window,"resize",function(){e.fixSubPixelOffset()})},5)):setTimeout(t,10)},t(),this},fixSubPixelOffset:function(){var t=this.node.getScreenCTM();this.style("left",-t.e%1+"px").style("top",-t.f%1+"px")}}),SVG.Shape=function(t){this.constructor.call(this,t)},SVG.Shape.prototype=new SVG.Element,SVG.Rect=function(){this.constructor.call(this,SVG.create("rect"))},SVG.Rect.prototype=new SVG.Shape,SVG.extend(SVG.Container,{rect:function(t,e){return this.put((new SVG.Rect).size(t,e))}}),SVG.Ellipse=function(){this.constructor.call(this,SVG.create("ellipse"))},SVG.Ellipse.prototype=new SVG.Shape,SVG.extend(SVG.Ellipse,{x:function(t){return null==t?this.cx()-this.attr("rx"):this.cx(t+this.attr("rx"))},y:function(t){return null==t?this.cy()-this.attr("ry"):this.cy(t+this.attr("ry"))},cx:function(t){return null==t?this.attr("cx"):this.attr("cx",t/this.trans.scaleX)},cy:function(t){return null==t?this.attr("cy"):this.attr("cy",t/this.trans.scaleY)},size:function(t,e){return this.attr({rx:t/2,ry:e/2})}}),SVG.extend(SVG.Container,{circle:function(t){return this.ellipse(t,t)},ellipse:function(t,e){return this.put((new SVG.Ellipse).size(t,e).move(0,0))}}),SVG.Line=function(){this.constructor.call(this,SVG.create("line"))},SVG.Line.prototype=new SVG.Shape,SVG.extend(SVG.Line,{x:function(t){var e=this.bbox();return null==t?e.x:this.attr({x1:this.attr("x1")-e.x+t,x2:this.attr("x2")-e.x+t})},y:function(t){var e=this.bbox();return null==t?e.y:this.attr({y1:this.attr("y1")-e.y+t,y2:this.attr("y2")-e.y+t})},cx:function(t){var e=this.bbox().width/2;return null==t?this.x()+e:this.x(t-e)},cy:function(t){var e=this.bbox().height/2;return null==t?this.y()+e:this.y(t-e)},size:function(t,e){var i=this.bbox();return this.attr(this.attr("x1")<this.attr("x2")?"x2":"x1",i.x+t).attr(this.attr("y1")<this.attr("y2")?"y2":"y1",i.y+e)},plot:function(t,e,i,n){return this.attr({x1:t,y1:e,x2:i,y2:n})}}),SVG.extend(SVG.Container,{line:function(t,e,i,n){return this.put((new SVG.Line).plot(t,e,i,n))}}),SVG.Polyline=function(t){this.constructor.call(this,SVG.create("polyline")),this.unbiased=t},SVG.Polyline.prototype=new SVG.Shape,SVG.Polygon=function(t){this.constructor.call(this,SVG.create("polygon")),this.unbiased=t},SVG.Polygon.prototype=new SVG.Shape,SVG.extend(SVG.Polyline,SVG.Polygon,{_plot:function(t){if(Array.isArray(t)){var e,i,n=[];for(e=0,i=t.length;i>e;e++)n.push(t[e].join(","));t=n.length>0?n.join(" "):"0,0"}return this.attr("points",t||"0,0")}}),SVG.extend(SVG.Container,{polyline:function(t,e){return this.put(new SVG.Polyline(e)).plot(t)},polygon:function(t,e){return this.put(new SVG.Polygon(e)).plot(t)}}),SVG.Path=function(t){this.constructor.call(this,SVG.create("path")),this.unbiased=t},SVG.Path.prototype=new SVG.Shape,SVG.extend(SVG.Path,{_plot:function(t){return this.attr("d",t||"M0,0")}}),SVG.extend(SVG.Container,{path:function(t,e){return this.put(new SVG.Path(e)).plot(t)}}),SVG.extend(SVG.Polyline,SVG.Polygon,SVG.Path,{x:function(t){return null==t?this.bbox().x:this.transform("x",t)},y:function(t){return null==t?this.bbox().y:this.transform("y",t)},size:function(t,e){var i=t/this._offset.width;return this.transform({scaleX:i,scaleY:null!=e?e/this._offset.height:i})},plot:function(t){var e=this.trans.scaleX,i=this.trans.scaleY;return this._plot(t),this._offset=this.transform({scaleX:1,scaleY:1}).bbox(),this.unbiased?this._offset.x=this._offset.y=0:(this._offset.x-=this.trans.x,this._offset.y-=this.trans.y),this.transform({scaleX:e,scaleY:i})}}),SVG.Image=function(){this.constructor.call(this,SVG.create("image"))},SVG.Image.prototype=new SVG.Shape,SVG.extend(SVG.Image,{load:function(t){return t?this.attr("xlink:href",this.src=t,SVG.xlink):this}}),SVG.extend(SVG.Container,{image:function(t,e,i){return e=null!=e?e:100,this.put((new SVG.Image).load(t).size(e,null!=i?i:e))}});var t="size family weight stretch variant style".split(" ");SVG.Text=function(){this.constructor.call(this,SVG.create("text")),this.styles={"font-size":16,"font-family":"Helvetica, Arial, sans-serif","text-anchor":"start"},this._leading=1.2,this._base=.276666666},SVG.Text.prototype=new SVG.Shape,SVG.extend(SVG.Text,{x:function(t,e){return null==t?e?this.attr("x"):this.bbox().x:(e||(e=this.style("text-anchor"),t="start"==e?t:"end"==e?t+this.bbox().width:t+this.bbox().width/2),this.attr("x",t))},cx:function(t){return null==t?this.bbox().cx:this.x(t-this.bbox().width/2)},cy:function(t,e){return null==t?this.bbox().cy:this.y(e?t:t-this.bbox().height/2)},move:function(t,e,i){return this.x(t,i).y(e)},center:function(t,e,i){return this.cx(t,i).cy(e,i)},text:function(t){if(null==t)return this.content;this.clear(),this.content=SVG.regex.isBlank.test(t)?"text":t;var e,i,n=t.split("\n");for(e=0,i=n.length;i>e;e++)this.tspan(n[e]);return this.attr("textLength",1).attr("textLength",null)},tspan:function(t){var e=(new SVG.TSpan).text(t);return this.node.appendChild(e.node),this.lines.push(e),e.attr("style",this.style())},size:function(t){return this.attr("font-size",t)},leading:function(t){return null==t?this._leading:(this._leading=t,this.rebuild("leading",t))},rebuild:function(){var t,e,i=this.styles["font-size"];for(t=0,e=this.lines.length;e>t;t++)this.lines[t].attr({dy:i*this._leading-(0==t?i*this._base:0),x:this.attr("x")||0,style:this.style()});return this},clear:function(){for(;this.node.hasChildNodes();)this.node.removeChild(this.node.lastChild);return this.lines=[],this}}),SVG.extend(SVG.Container,{text:function(t){return this.put((new SVG.Text).text(t))}}),SVG.TSpan=function(){this.constructor.call(this,SVG.create("tspan"))},SVG.TSpan.prototype=new SVG.Shape,SVG.extend(SVG.TSpan,{text:function(t){return this.node.appendChild(document.createTextNode(t)),this}}),SVG.Nested=function(){this.constructor.call(this,SVG.create("svg")),this.style("overflow","visible")},SVG.Nested.prototype=new SVG.Container,SVG.extend(SVG.Container,{nested:function(){return this.put(new SVG.Nested)}}),SVG._stroke=["color","width","opacity","linecap","linejoin","miterlimit","dasharray","dashoffset"],SVG._fill=["color","opacity","rule"];var e=function(t,e){return"color"==e?t:t+"-"+e};["fill","stroke"].forEach(function(t){var i={};i[t]=function(i){if("string"==typeof i||SVG.Color.isRgb(i))this.attr(t,i);else for(index=SVG["_"+t].length-1;index>=0;index--)null!=i[SVG["_"+t][index]]&&this.attr(e(t,SVG["_"+t][index]),i[SVG["_"+t][index]]);return this},SVG.extend(SVG.Shape,SVG.FX,i)}),SVG.extend(SVG.Element,SVG.FX,{rotate:function(t,e,i){return this.transform({rotation:t||0,cx:e,cy:i})},skew:function(t,e){return this.transform({skewX:t||0,skewY:e||0})},scale:function(t,e){return this.transform({scaleX:t,scaleY:null==e?t:e})},translate:function(t,e){return this.transform({x:t,y:e})},matrix:function(t){return this.transform({matrix:t})},opacity:function(t){return this.attr("opacity",t)}}),SVG.Text&&SVG.extend(SVG.Text,SVG.FX,{font:function(e){for(var i in e)"anchor"==i?this.attr("text-anchor",e[i]):t.indexOf(i)>-1?this.attr("font-"+i,e[i]):this.attr(i,e[i]);return this}})}).call(this);
\ No newline at end of file
diff --git a/src/fx.js b/src/fx.js
index 1b0247e..e1063e3 100644
--- a/src/fx.js
+++ b/src/fx.js
@@ -7,7 +7,9 @@ SVG.FX = function(element) {
 SVG.extend(SVG.FX, {
   // Add animation parameters and start animation
   animate: function(d, ease, delay) {
-    var fx = this
+    var akeys, tkeys, skeys, key
+      , element = this.target
+      , fx = this
     
     /* dissect object if one is passed */
     if (typeof d == 'object') {
@@ -15,113 +17,122 @@ SVG.extend(SVG.FX, {
       ease = d.ease
       d = d.duration
     }
-    
-    /* delay animation */
-    this.timeout = setTimeout(function() {
-      
-      /* ensure default duration and easing */
-      d = d == null ? 1000 : d
-      ease = ease || '<>'
-      
-      var akeys, tkeys, skeys
-        , interval  = 1000 / 60
-        , element   = fx.target
-        , start     = new Date().getTime()
-        , finish    = start + d
 
-      /* start animation */
-      fx.interval = setInterval(function(){
-        // This code was borrowed from the emile.js micro framework by Thomas Fuchs, aka MadRobby.
-        var i, key
-          , time = new Date().getTime()
-          , pos = time > finish ? 1 : (time - start) / d
+    /* ensure default duration and easing */
+    d = d == null ? 1000 : d
+    ease = ease || '<>'
 
-        /* collect attribute keys */
-        if (akeys == null) {
-          akeys = []
-          for (key in fx.attrs)
-            akeys.push(key)
-        }
+    /* process values */
+    fx.to = function(pos) {
+      var i
 
-        /* collect transformation keys */
-        if (tkeys == null) {
-          tkeys = []
-          for (key in fx.trans)
-            tkeys.push(key)
-        }
+      /* normalise pos */
+      pos = pos < 0 ? 0 : pos > 1 ? 1 : pos
 
-        /* collect style keys */
-        if (skeys == null) {
-          skeys = []
-          for (key in fx.styles)
-            skeys.push(key)
-        }
+      /* collect attribute keys */
+      if (akeys == null) {
+        akeys = []
+        for (key in fx.attrs)
+          akeys.push(key)
+      }
 
-        /* apply easing */
-        pos = ease == '<>' ?
-          (-Math.cos(pos * Math.PI) / 2) + 0.5 :
-        ease == '>' ?
-          Math.sin(pos * Math.PI / 2) :
-        ease == '<' ?
-          -Math.cos(pos * Math.PI / 2) + 1 :
-        ease == '-' ?
-          pos :
-        typeof ease == 'function' ?
-          ease(pos) :
-          pos
+      /* collect transformation keys */
+      if (tkeys == null) {
+        tkeys = []
+        for (key in fx.trans)
+          tkeys.push(key)
+      }
 
-        /* run all x-position properties */
-        if (fx._x)
-          element.x(fx._at(fx._x, pos))
-        else if (fx._cx)
-          element.cx(fx._at(fx._cx, pos))
+      /* collect style keys */
+      if (skeys == null) {
+        skeys = []
+        for (key in fx.styles)
+          skeys.push(key)
+      }
 
-        /* run all y-position properties */
-        if (fx._y)
-          element.y(fx._at(fx._y, pos))
-        else if (fx._cy)
-          element.cy(fx._at(fx._cy, pos))
+      /* apply easing */
+      pos = ease == '<>' ?
+        (-Math.cos(pos * Math.PI) / 2) + 0.5 :
+      ease == '>' ?
+        Math.sin(pos * Math.PI / 2) :
+      ease == '<' ?
+        -Math.cos(pos * Math.PI / 2) + 1 :
+      ease == '-' ?
+        pos :
+      typeof ease == 'function' ?
+        ease(pos) :
+        pos
 
-        /* run all size properties */
-        if (fx._size)
-          element.size(fx._at(fx._size.width, pos), fx._at(fx._size.height, pos))
+      /* run all x-position properties */
+      if (fx._x)
+        element.x(fx._at(fx._x, pos))
+      else if (fx._cx)
+        element.cx(fx._at(fx._cx, pos))
 
-        /* run all viewbox properties */
-        if (fx._viewbox)
-          element.viewbox(
-            fx._at(fx._viewbox.x, pos)
-          , fx._at(fx._viewbox.y, pos)
-          , fx._at(fx._viewbox.width, pos)
-          , fx._at(fx._viewbox.height, pos)
-          )
+      /* run all y-position properties */
+      if (fx._y)
+        element.y(fx._at(fx._y, pos))
+      else if (fx._cy)
+        element.cy(fx._at(fx._cy, pos))
 
-        /* animate attributes */
-        for (i = akeys.length - 1; i >= 0; i--)
-          element.attr(akeys[i], fx._at(fx.attrs[akeys[i]], pos))
+      /* run all size properties */
+      if (fx._size)
+        element.size(fx._at(fx._size.width, pos), fx._at(fx._size.height, pos))
 
-        /* animate transformations */
-        for (i = tkeys.length - 1; i >= 0; i--)
-          element.transform(tkeys[i], fx._at(fx.trans[tkeys[i]], pos))
+      /* run all viewbox properties */
+      if (fx._viewbox)
+        element.viewbox(
+          fx._at(fx._viewbox.x, pos)
+        , fx._at(fx._viewbox.y, pos)
+        , fx._at(fx._viewbox.width, pos)
+        , fx._at(fx._viewbox.height, pos)
+        )
 
-        /* animate styles */
-        for (i = skeys.length - 1; i >= 0; i--)
-          element.style(skeys[i], fx._at(fx.styles[skeys[i]], pos))
+      /* animate attributes */
+      for (i = akeys.length - 1; i >= 0; i--)
+        element.attr(akeys[i], fx._at(fx.attrs[akeys[i]], pos))
 
-        /* callback for each keyframe */
-        if (fx._during)
-          fx._during.call(element, pos, function(from, to) {
-            return fx._at({ from: from, to: to }, pos)
-          })
+      /* animate transformations */
+      for (i = tkeys.length - 1; i >= 0; i--)
+        element.transform(tkeys[i], fx._at(fx.trans[tkeys[i]], pos))
 
-        /* finish off animation */
-        if (time > finish) {
-          clearInterval(fx.interval)
-          fx._after ? fx._after.apply(element, [fx]) : fx.stop()
-        }
+      /* animate styles */
+      for (i = skeys.length - 1; i >= 0; i--)
+        element.style(skeys[i], fx._at(fx.styles[skeys[i]], pos))
 
-      }, d > interval ? interval : d)
-      
-    }, delay || 0)
+      /* callback for each keyframe */
+      if (fx._during)
+        fx._during.call(element, pos, function(from, to) {
+          return fx._at({ from: from, to: to }, pos)
+        })
+    }
+    
+    if (typeof d === 'number') {
+      /* delay animation */
+      this.timeout = setTimeout(function() {
+        var interval  = 1000 / 60
+          , start     = new Date().getTime()
+          , finish    = start + d
+  
+        /* start animation */
+        fx.interval = setInterval(function(){
+          // This code was borrowed from the emile.js micro framework by Thomas Fuchs, aka MadRobby.
+          var time = new Date().getTime()
+            , pos = time > finish ? 1 : (time - start) / d
+  
+          /* process values */
+          fx.to(pos)
+  
+          /* finish off animation */
+          if (time > finish) {
+            clearInterval(fx.interval)
+            fx._after ? fx._after.apply(element, [fx]) : fx.stop()
+          }
+  
+        }, d > interval ? interval : d)
+        
+      }, delay || 0)
+    }
     
     return this
   }
diff --git a/src/rect.js b/src/rect.js
index 852bee2..583556d 100644
--- a/src/rect.js
+++ b/src/rect.js
@@ -11,6 +11,5 @@ SVG.extend(SVG.Container, {
   rect: function(width, height) {
     return this.put(new SVG.Rect().size(width, height))
   }
-  
 
 })
\ No newline at end of file