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/**

* jQuery Roundabout Shapes v1.1

* http://fredhq.com/projects/roundabout-shapes/

*

* Provides additional paths along which items can move for the

* jQuery Roundabout plugin (v1.0+).

*

* Terms of Use // jQuery Roundabout Shapes

*

* Open source under the BSD license

*

* Copyright (c) 2009, Fred LeBlanc

* 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 its 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 HOLDER 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.

*/

jQuery.extend(jQuery.roundabout_shape,

{

theJuggler: function(r, a, t) {

return {

x: Math.sin(r + a),

y: Math.tan(Math.exp(Math.log(r)) + a) / (t - 1),

z: (Math.cos(r + a) + 1) / 2,

scale: (Math.sin(r + Math.PI/2 + a) / 2) + 0.5

};

},

figure8: function(r, a, t) {

return {

x: Math.sin(r * 2 + a),

y: (Math.sin(r + Math.PI/2 + a) / 8) * t,

z: (Math.cos(r + a) + 1) / 2,

scale: (Math.sin(r + Math.PI/2 + a) / 2) + 0.5

};

},

waterWheel: function(r, a, t) {

return {

x: (Math.sin(r + Math.PI/2 + a) / 8) * t,

y: Math.sin(r + a) / (Math.PI/2),

z: (Math.cos(r + a) + 1) / 2,

scale: (Math.sin(r + Math.PI/2 + a) / 2) + 0.5

};

},

square: function(r, a, t) {

var sq_x, sq_y, sq_z;

if (r <= Math.PI/2) {

sq_x = (2/Math.PI) * r;

sq_y = -(2/Math.PI) * r + 1;

sq_z = -(1/Math.PI) * r + 1;

} else if (r > Math.PI/2 && r <= Math.PI) {

sq_x = -(2/Math.PI) * r + 2;

sq_y = -(2/Math.PI) * r + 1;

sq_z = -(1/Math.PI) * r + 1;

} else if (r > Math.PI && r <= (3 * Math.PI) / 2) {

sq_x = -(2/Math.PI) * r + 2;

sq_y = (2/Math.PI) * r - 3;

sq_z = (1/Math.PI) * r - 1;

} else {

sq_x = (2/Math.PI) * r - 4;

sq_y = (2/Math.PI) * r - 3;

sq_z = (1/Math.PI) * r - 1;

}

return {

x: sq_x,

y: sq_y * t,

z: sq_z,

scale: sq_z

}

},

conveyorBeltLeft: function(r, a, t) {

return {

x: -Math.cos(r + a),

y: (Math.cos(r + 3*Math.PI/2 + a) / 8) * t,

z: (Math.sin(r + a) + 1) / 2,

scale: (Math.sin(r + Math.PI/2 + a) / 2) + 0.5

};

},

conveyorBeltRight: function(r, a, t) {

return {

x: Math.cos(r + a),

y: (Math.cos(r + 3*Math.PI/2 + a) / 8) * t,

z: (Math.sin(r + a) + 1) / 2,

scale: (Math.sin(r + Math.PI/2 + a) / 2) + 0.5

};

},

goodbyeCruelWorld: function(r, a, t) {

return {

x: Math.sin(r + a),

y: (Math.tan(r + 3*Math.PI/2 + a) / 8) * (t + 0.5),

z: (Math.sin(r + a) + 1) / 2,

scale: (Math.sin(r + Math.PI/2 + a) / 2) + 0.5

};

},

diagonalRingLeft: function(r, a, t) {

return {

x: Math.sin(r + a),

y: -Math.cos(r + Math.tan(Math.cos(a))) / (t + 1.5),

z: (Math.cos(r + a) + 1) / 2,

scale: (Math.sin(r + Math.PI/2 + a) / 2) + 0.5

};

},

diagonalRingRight: function(r, a, t) {

return {

x: Math.sin(r + a),

y: Math.cos(r + Math.tan(Math.cos(a))) / (t + 1.5),

z: (Math.cos(r + a) + 1) / 2,

scale: (Math.sin(r + Math.PI/2 + a) / 2) + 0.5

};

},

rollerCoaster: function(r, a, t) {

return {

x: Math.sin(r + a),

y: Math.sin((2 + t) * r),

z: (Math.cos(r + a) + 1) / 2,

scale: (Math.sin(r + Math.PI/2 + a) / 2) + 0.5

}

},

tearDrop: function(r, a, t) {

return {

x: Math.sin(r + a),

y: -Math.sin(r/2 + t) + 0.35,

z: (Math.cos(r + a) + 1) / 2,

scale: (Math.sin(r + Math.PI/2 + a) / 2) + 0.5

}

}

});