slot_js

slot.js

// (The MIT License)
// 
// Copyright (c) 2011 Ledsworth Consulting LLC
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
// documentation files (the "Software"), to deal in the Software without restriction, including without limitation the 
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit 
// persons to whom the Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the 
// Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
// WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR 
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

$(document).ready(function(){
  $('div.machine_handle').click( function() { start_spin(); } );
});

function get_cash_amount() {
  return parseInt($('span#cash').html());
}

function add_to_cash(amount) {
  $('span#cash').html(get_cash_amount() + amount); 
}

function start_spin() {
  cash = get_cash_amount();
  if(cash > 0) {
    add_to_cash(-2);
    $('div.message').hide();
    spin();
  }
  else {
    alert("Sorry, you're out of cash!");
  }
};

function move_handle() {
  $('div.ball').animate({top: '+=80'},900);
  $('div.ball').animate({top: '-=80'},900);
}

function spin() {
  move_handle();
  var w1Spins = true; var w2Spins = true; var w3Spins = true;
  var w1Spinstop = 10 + randStop();
  var w2Spinstop = w1Spinstop + 15 + randStop();
  var w3Spinstop = w2Spinstop + 15 + randStop();

  var w1 = $('div#w1');
  var w2 = $('div#w2');
  var w3 = $('div#w3');

  var spinCount = 0;
  while(w3Spins) {
    spinCount++;

    w1Spins = (spinCount < w1Spinstop) ? true : false;
    w2Spins = (spinCount < w2Spinstop) ? true : false;
    w3Spins = (spinCount < w3Spinstop) ? true : false;

    if(w1Spins) 
      advanceWheel(w1);
    if(w2Spins) 
      advanceWheel(w2);
    if(w3Spins)  
      advanceWheel(w3);
     
    // Move back to top.
    if(w1Spins)  
      w1.animate({"top": "-=30"},0);
    if(w2Spins)  
      w2.animate({"top": "-=30"},0);
    if(w3Spins)  
      w3.animate({"top": "-=30"},0);
  }
  // Trick to ensure spin result is only called after all of the 
  // above animations....
  w3.animate({"top": "-=0"}, 1, function() { spin_result(); });
};

// To emulate spinning, after shifting all wheels down one row,
// quickly shift them back up and then move all symbols down
// one row.  This approach saves having to move divs which roll 
// off the display back to the very top such that they can scroll
// down again.  1) Shift wheel back up. 2) Shift symbols down
function advanceWheel(w) {
  w.animate({"top": "+=29"}, 100);
  w.animate({"top": "+=1"}, 0, function() { shiftSymbolsDown(this); });
};

function shiftSymbolsDown(w) {
  var tmp = w.children[4].innerHTML;
  var tmp2 = w.children[4].getAttribute('val');
  for(var c=4; c>0; c--) {
    w.children[c].innerHTML = w.children[c-1].innerHTML;
    w.children[c].setAttribute('val',w.children[c-1].getAttribute('val'));
  }
  w.children[0].innerHTML = tmp;
  w.children[0].setAttribute('val',tmp2);
};

function spin_result() {
  var result = "";
  for(var w=1; w<4; w++)
    result += $('div#w'+w+' #s2').attr('val');

  if(result.match(/777/gi))
     won(500);
  else if(result.match(/===/gi))
     won(400);
  else if(result.match(/---/gi))
     won(300);
  else if(result.match(/[=|-]{3}/gi))
     won(100);
};

function won(amount) {
  add_to_cash(amount);
  $('div.message').show().html('You won '+amount+' Points');
}

function randStop() {
  return Math.floor(Math.random()*11);
}