javascript - JQuery: how to make a superposition of many moving animations which start asynchronously? -

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i want make 1 animation superimposed on another. the second (the third, fourth) animation can start asynchronously. need specify difference between new , old positions (not absolute 'left').

e.g.

// 1 moment $( '#my_div' ).animate( { 'leftshift': "+20px", 2000, 'easeoutquad' } );  // moment, may second later $( '#my_div' ).animate( { 'leftshift': "+50px" }, 2000, 'easeoutquad' );

is possible add results of several animations?

the graph clarify want (x-axis: time, y-axis: speed of distance change).

enter image description here

i'd see speeds of animations added, not one-by-one animations.

what did roko c. buljan offer?

enter image description here

but don't want deferred animations, want real-time animation.

note. current syntax ("+20px", "+50px") not supported now. it's example.

i solved problem case.

i need smooth animation. so, when user initiates new push, should new impulse. so, object mustn't stopped before.

i choose 'easing' function smooth movement - 'easeinoutquad'. implemented own version (i removed not necessary parameters standart 'easing' options of jquery):

// browsers works bad if there float px  function asyncanimate( obj, props, duration, easing ) {     function _gettime()     {         var d = new date();         return d.gettime();     }             var starttime = _gettime();     var duration = duration;      var animnum = asyncanimate._animnum;      var propints = {}; // increment ints     var propfloats = {};      for( var iprop in props )     {         var sprop = obj.css( iprop );         propfloats[ iprop ] = 0.0; // in beginning floats 0     }       var animinterval = setinterval(          function()         {             var curtime = _gettime();              if( curtime <= starttime + duration )             {                 var timediff = curtime - starttime;                 var step = easing( timediff / duration, timediff, 0, 1, duration );                  var dstep;                  var prevstep = asyncanimate._prevsteps[ animnum ];                  if( prevstep == null )                 {                     dstep = step;                 }                 else                 {                     dstep = step - prevstep;                                         }                  asyncanimate._prevsteps[ animnum ] = step;                  for( var iprop in props )                 {                                        var prop = props[ iprop ];                      // can increment int px (for crossbrowser solution),                     // so, need save float part                                       var propstep = prop * dstep;                      // calculate total int part                     var savedfloatpart = propfloats[ iprop ];                      var totalpropstep = propstep + savedfloatpart;                     var totalpropstepint = parseint( totalpropstep );                     var totalpropstepfloat = totalpropstep - totalpropstepint;                      if( math.abs( totalpropstepint ) > 0 )                     {                                                                            obj.css( iprop, "+=" + string( totalpropstepint ) + "px" );                     }                      // reset saved int/float parts                     propfloats[ iprop ] = totalpropstepfloat;                 }             }             else             {                                    clearinterval( animinterval );             }         },         10      );      asyncanimate._animnum++; }  asyncanimate._prevsteps = {}; asyncanimate._animnum = 0;

examples of usage (do not forgent include js easing functions) or create own:

asyncanimate( $( '#div1' ), { 'margin-left': 50 }, 1000, $.easing.easeinoutelastic ); // ... asyncanimate( $( '.green' ), { 'width': -50, 'height': -50 }, 250, $.easing.easeinoutquad );

you can see how works (try press buttons in short intervals).

i hope it's easy adapt other types of animations.

it seems animate() of jquery not support behavior currently.


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