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Easings: Rewrote all easings to only rely on state and reduce code si…

…ze. Fixes #8115 - Easings: Simplify equations to only rely on state.
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scottgonzalez committed Feb 11, 2012
1 parent 530d4cb commit c0093b599fcd58b6ad122ab425c4cc1a4da4a520
Showing with 53 additions and 232 deletions.
  1. +18 −17 demos/effect/easing.html
  2. +35 −215 ui/jquery.effects.core.js
@@ -15,33 +15,31 @@
</style>
<script>
$(function() {
if ( !$( "<canvas/>" )[0].getContext ) {
$( "<div/>" ).text(
"Your browser doesn't support canvas, which is required for this demo. " +
"Give Firefox 3 a try!"
if ( !$( "<canvas>" )[0].getContext ) {
$( "<div>" ).text(
"Your browser doesn't support canvas, which is required for this demo."
).appendTo( "#graphs" );
return;
}
var i = 0,
width = 100,
height = 100;
$.each( $.easing, function( name, impl ) {
// skip linear/jswing and any non functioning implementation
if ( !$.isFunction( impl ) || /jswing/.test( name ) ) {
return;
}
var graph = $( "<div/>" ).addClass( "graph" ).appendTo( "#graphs" ),
text = $( "<div/>" ).text( ++i + ". " + name ).appendTo( graph ),
wrap = $( "<div/>" ).appendTo( graph ).css( 'overflow', 'hidden' ),
canvas = $( "<canvas/>" ).appendTo( wrap )[ 0 ];
var graph = $( "<div>" ).addClass( "graph" ).appendTo( "#graphs" ),
text = $( "<div>" ).text( ++i + ". " + name ).appendTo( graph ),
wrap = $( "<div>" ).appendTo( graph ).css( 'overflow', 'hidden' ),
canvas = $( "<canvas>" ).appendTo( wrap )[ 0 ];
canvas.width = width;
canvas.height = height;
var drawHeight = height * 0.8,
cradius = 10;
ctx = canvas.getContext( "2d" );
ctx.fillStyle = "black";
// draw background
ctx.beginPath();
ctx.moveTo( cradius, 0 );
ctx.quadraticCurveTo( 0, 0, 0, cradius );
@@ -53,31 +51,34 @@
ctx.lineTo( cradius, 0 );
ctx.fill();
// draw bottom line
ctx.strokeStyle = "#555";
ctx.beginPath();
ctx.moveTo( width * 0.1, drawHeight + .5 );
ctx.lineTo( width * 0.9, drawHeight + .5 );
ctx.stroke();
// draw top line
ctx.strokeStyle = "#555";
ctx.beginPath();
ctx.moveTo( width * 0.1, drawHeight * .3 - .5 );
ctx.lineTo( width * 0.9, drawHeight * .3 - .5 );
ctx.stroke();
// plot easing
ctx.strokeStyle = "white";
ctx.beginPath();
ctx.lineWidth = 2;
ctx.moveTo( width * 0.1, drawHeight );
$.each( new Array( width ), function( position ) {
var val = impl( 0, position, 0, 1, height );
if ( /linear|jswing/.test( name ) ) {
val = position / width;
}
var state = position / width,
val = impl( state, position, 0, 1, width );
ctx.lineTo( position * 0.8 + width * 0.1,
drawHeight - drawHeight * val * 0.7 );
});
ctx.stroke();
// animate on click
graph.click(function() {
wrap
.animate( { height: "hide" }, 2000, name )
@@ -662,229 +662,49 @@ $.fn.extend({
/*********************************** EASING ***********************************/
/******************************************************************************/

/*
* jQuery Easing v1.3 - http://gsgd.co.uk/sandbox/jquery/easing/
*
* Uses the built in easing capabilities added In jQuery 1.1
* to offer multiple easing options
*
* TERMS OF USE - jQuery Easing
*
* Open source under the BSD License.
*
* Copyright 2008 George McGinley Smith
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* Neither the name of the author nor the names of contributors may be used to endorse
* or promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
// based on easing equations from Robert Penner (http://www.robertpenner.com/easing)

// t: current time, b: begInnIng value, c: change In value, d: duration
$.easing.jswing = $.easing.swing;
var baseEasings = {};

$.extend( $.easing, {
def: "easeOutQuad",
swing: function ( x, t, b, c, d ) {
return $.easing[ $.easing.def ]( x, t, b, c, d );
},
easeInQuad: function ( x, t, b, c, d ) {
return c * ( t /= d ) * t + b;
},
easeOutQuad: function ( x, t, b, c, d ) {
return -c * ( t /= d ) * ( t - 2 ) + b;
},
easeInOutQuad: function ( x, t, b, c, d ) {
if ( ( t /= d / 2 ) < 1 ) return c / 2 * t * t + b;
return -c / 2 * ( ( --t ) * ( t-2 ) - 1) + b;
},
easeInCubic: function ( x, t, b, c, d ) {
return c * ( t /= d ) * t * t + b;
},
easeOutCubic: function ( x, t, b, c, d ) {
return c * ( ( t = t / d - 1 ) * t * t + 1 ) + b;
},
easeInOutCubic: function ( x, t, b, c, d ) {
if ( ( t /= d / 2 ) < 1 ) return c / 2 * t * t * t + b;
return c / 2 * ( ( t -= 2 ) * t * t + 2) + b;
},
easeInQuart: function ( x, t, b, c, d ) {
return c * ( t /= d ) * t * t * t + b;
},
easeOutQuart: function ( x, t, b, c, d ) {
return -c * ( ( t = t / d - 1 ) * t * t * t - 1) + b;
},
easeInOutQuart: function ( x, t, b, c, d ) {
if ( (t /= d / 2 ) < 1 ) return c / 2 * t * t * t * t + b;
return -c / 2 * ( ( t -= 2 ) * t * t * t - 2) + b;
},
easeInQuint: function ( x, t, b, c, d ) {
return c * ( t /= d ) * t * t * t * t + b;
},
easeOutQuint: function ( x, t, b, c, d ) {
return c * ( ( t = t / d - 1 ) * t * t * t * t + 1) + b;
},
easeInOutQuint: function ( x, t, b, c, d ) {
if ( ( t /= d / 2 ) < 1 ) return c / 2 * t * t * t * t * t + b;
return c / 2 * ( ( t -= 2 ) * t * t * t * t + 2) + b;
},
easeInSine: function ( x, t, b, c, d ) {
return -c * Math.cos( t / d * ( Math.PI / 2 ) ) + c + b;
},
easeOutSine: function ( x, t, b, c, d ) {
return c * Math.sin( t / d * ( Math.PI /2 ) ) + b;
},
easeInOutSine: function ( x, t, b, c, d ) {
return -c / 2 * ( Math.cos( Math.PI * t / d ) - 1 ) + b;
},
easeInExpo: function ( x, t, b, c, d ) {
return ( t==0 ) ? b : c * Math.pow( 2, 10 * ( t / d - 1) ) + b;
},
easeOutExpo: function ( x, t, b, c, d ) {
return ( t==d ) ? b + c : c * ( -Math.pow( 2, -10 * t / d) + 1) + b;
},
easeInOutExpo: function ( x, t, b, c, d ) {
if ( t==0 ) return b;
if ( t==d ) return b + c;
if ( ( t /= d / 2) < 1) return c / 2 * Math.pow( 2, 10 * (t - 1) ) + b;
return c / 2 * ( -Math.pow( 2, -10 * --t ) + 2 ) + b;
},
easeInCirc: function ( x, t, b, c, d ) {
return -c * ( Math.sqrt( 1 - ( t /= d ) * t ) - 1 ) + b;
},
easeOutCirc: function ( x, t, b, c, d ) {
return c * Math.sqrt( 1 - ( t = t / d - 1 ) * t ) + b;
},
easeInOutCirc: function ( x, t, b, c, d ) {
if ( ( t /= d / 2) < 1 ) return -c / 2 * ( Math.sqrt( 1 - t * t ) - 1 ) + b;
return c / 2 * ( Math.sqrt( 1 - ( t -= 2 ) * t ) + 1 ) + b;
},
easeInElastic: function ( x, t, b, c, d ) {
var s = 1.70158,
p = d * 0.3,
a = c;
if ( t == 0 ) return b;
if ( ( t /= d ) == 1 ) return b+c;
if ( a < Math.abs( c ) ) {
a = c;
s = p / 4;
} else {
s = p / ( 2 * Math.PI ) * Math.asin( c / a );
}
return - ( a * Math.pow( 2, 10 * ( t -= 1 ) ) * Math.sin( ( t * d - s) * ( 2 * Math.PI ) / p ) ) + b;
},
easeOutElastic: function ( x, t, b, c, d ) {
var s = 1.70158,
p = d * 0.3,
a = c;
if ( t == 0 ) return b;
if ( ( t /= d ) == 1 ) return b+c;
if ( a < Math.abs( c ) ) {
a = c;
s = p / 4;
} else {
s = p / ( 2 * Math.PI ) * Math.asin( c / a );
}
return a * Math.pow( 2, -10 * t ) * Math.sin( ( t * d - s ) * ( 2 * Math.PI ) / p ) + c + b;
},
easeInOutElastic: function ( x, t, b, c, d ) {
var s = 1.70158,
p = d * ( 0.3 * 1.5 ),
a = c;
if ( t == 0 ) return b;
if ( ( t /= d / 2 ) == 2 ) return b+c;
if ( a < Math.abs( c ) ) {
a = c;
s = p / 4;
} else {
s = p / ( 2 * Math.PI ) * Math.asin( c / a );
}
if ( t < 1 ) return -.5 * ( a * Math.pow( 2, 10 * ( t -= 1 ) ) * Math.sin( ( t * d - s ) * ( 2 * Math.PI ) / p ) ) + b;
return a * Math.pow( 2, -10 * ( t -= 1 ) ) * Math.sin( ( t * d - s ) * ( 2 * Math.PI ) / p ) *.5 + c + b;
},
easeInBack: function ( x, t, b, c, d, s ) {
if ( s == undefined ) s = 1.70158;
return c * ( t /= d ) * t * ( ( s+1 ) * t - s ) + b;
},
easeOutBack: function ( x, t, b, c, d, s ) {
if ( s == undefined ) s = 1.70158;
return c * ( ( t = t / d - 1 ) * t * ( ( s + 1 ) * t + s) + 1) + b;
$.each( [ "Quad", "Cubic", "Quart", "Quint", "Expo" ], function( i, name ) {
baseEasings[ name ] = function( p ) {
return Math.pow( p, i + 2 );
};
});

$.extend( baseEasings, {
Sine: function ( p ) {
return 1 - Math.cos( p * Math.PI / 2 );
},
easeInOutBack: function ( x, t, b, c, d, s ) {
if ( s == undefined ) s = 1.70158;
if ( ( t /= d / 2 ) < 1 ) return c / 2 * ( t * t * ( ( ( s *= 1.525 ) + 1 ) * t - s ) ) + b;
return c / 2 * ( ( t -= 2 ) * t * ( ( ( s *= 1.525 ) + 1 ) * t + s) + 2) + b;
Circ: function ( p ) {
return 1 - Math.sqrt( 1 - p * p );
},
easeInBounce: function ( x, t, b, c, d ) {
return c - $.easing.easeOutBounce( x, d - t, 0, c, d ) + b;
Elastic: function( p ) {
return p === 0 || p === 1 ? p :
-Math.pow( 2, 8 * (p - 1) ) * Math.sin( ( (p - 1) * 80 - 7.5 ) * Math.PI / 15 );
},
easeOutBounce: function ( x, t, b, c, d ) {
if ( ( t /= d ) < ( 1 / 2.75 ) ) {
return c * ( 7.5625 * t * t ) + b;
} else if ( t < ( 2 / 2.75 ) ) {
return c * ( 7.5625 * ( t -= ( 1.5 / 2.75 ) ) * t + .75 ) + b;
} else if ( t < ( 2.5 / 2.75 ) ) {
return c * ( 7.5625 * ( t -= ( 2.25/ 2.75 ) ) * t + .9375 ) + b;
} else {
return c * ( 7.5625 * ( t -= ( 2.625 / 2.75 ) ) * t + .984375 ) + b;
}
Back: function( p ) {
return p * p * ( 3 * p - 2 );
},
easeInOutBounce: function ( x, t, b, c, d ) {
if ( t < d / 2 ) return $.easing.easeInBounce( x, t * 2, 0, c, d ) * .5 + b;
return $.easing.easeOutBounce( x, t * 2 - d, 0, c, d ) * .5 + c * .5 + b;
Bounce: function ( p ) {
var pow2,
bounce = 4;

while ( p < ( ( pow2 = Math.pow( 2, --bounce ) ) - 1 ) / 11 ) {}
return 1 / Math.pow( 4, 3 - bounce ) - 7.5625 * Math.pow( ( pow2 * 3 - 2 ) / 22 - p, 2 );
}
});

/*
*
* TERMS OF USE - EASING EQUATIONS
*
* Open source under the BSD License.
*
* Copyright 2001 Robert Penner
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* Neither the name of the author nor the names of contributors may be used to endorse
* or promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
$.each( baseEasings, function( name, easeIn ) {
$.easing[ "easeIn" + name ] = easeIn;
$.easing[ "easeOut" + name ] = function( p ) {
return 1 - easeIn( 1 - p );
};
$.easing[ "easeInOut" + name ] = function( p ) {
return p < .5 ?
easeIn( p * 2 ) / 2 :
easeIn( p * -2 + 2 ) / -2 + 1;
};
});

})(jQuery);

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