Random Sequence Generator

function swapWords(%string, %w0, %w1) {
   %stash = getWord(%string, %w0);
   %string = setWord(%string, %w0, getWord(%string, %w1));
   %string = setWord(%string, %w1, %stash);
   return %string;
}

$str = swapWords("hello world", 0, 1);

String generateNRNumberString(S32 min, S32 max, S32 amount, String tokenStr) {
	if(((max - min)+1) < amount) {
		Con::errorf("generateNRNumberString: Cannot generate NR number string with given max/min/amount parameters");
		return "";
	}
   String out;
	//Generate the number list.
   MRandomDeck<S32> mVals;
	for(S32 i = min; i <= max; i++) {
	   mVals.addToPile(i);
	}
	mVals.shuffle();

	//Pull 'amount' values from the list.
	S32 currentItem;
	for(S32 i = 0; i < amount; i++) {
		mVals.draw(&currentItem);
		out += String::toString("%i", currentItem);
		if(i != amount-1) {
		   out += tokenStr;
		}
	}

	return out;
}

function generateTiles(%range, %count)
{
   //%range is total number of tiles
   //%count is number of tiles to be used
   echo( " >> randomCity.cs->generateTiles range " @ %range @ " count: " @%count); 
   
   //create the array
   %array = new ArrayObject(tileArray) {};
	MissionCleanup.add(%array);
   
   //Atile is a 128 x 128 section of city - we'll assign it a prefab number here.
   for (%tile = 1; %tile <= %count; %tile++)
   {
      //generate a random number within the range
      %random = getRandom(1, %range);
      echo( " >> randomCity.cs->generateTiles value for random is: " @%random);
      
      
      //tileArray.add(%tile, %random);//Obviously, adding here works but the numbers aren't unique

      //check for duplicates
      for (%i = 1; %i <= %tile; %i++)
      {
         %val = tileArray.getValue(%i);
         echo( " >> randomCity.cs->generateTiles index is: "@%i@" value is: " @%val);
         //If we have a dupe, skip and go to the next
         if(%val $= %random)
         {
            echo( " >> randomCity.cs->generateTiles val "@%val@" $= random "@%random);
            continue;
         }
         else
         {
            //Add the unique number to the array
            tileArray.add(%tile, %random);
            %test = tileArray.getValue(%tile);
            echo( " >> randomCity.cs->generateTiles tileArray index "@%tile@" value is  "@%test);
         }
      }
   }

}

function generateTiles(%range, %count)
{
   //%range is total number of tiles
   //%count is number of tiles to be used
   
   %array = new ArrayObject(tileArray);
   MissionCleanup.add(%array);
   
   //fill the array with tile numbers
   for(%tile = 1; %tile <= %range; %tile++)
   {
      tileArray.add(%tile, %null);
   }
   
   for(%i = 0; %i < %count; %i++)
   {
      %index = getRandom(0, %range-1);
      %sequenceList[%i] = tileArray.getKey(%index);
      tileArray.erase(%index);
      %range--;
   }
   
   for(%i = 0; %i < %count; %i++)
   {
      echo(%sequenceList[%i]);
   }
}

template <class RandomAccessIterator, class RandomNumberGenerator>
  void random_shuffle (RandomAccessIterator first, RandomAccessIterator last,
                       RandomNumberGenerator& gen)
{
  iterator_traits<RandomAccessIterator>::difference_type i, n;
  n = (last-first);
  for (i=n-1; i>0; --i) {
    swap (first[i],first[gen(i+1)]);
  }
}

function generateCity(%range, %count)
{
   //echo( " >> randomCity.cs->generateCity called: range " @ %range @ " count: " @%count);

   //scriptObject here that we'll unhook later and add to theLevelInfo
   //or alternately, parse the file names from a folder and assemble into this list...
   
   if(theLevelInfo.tileList $= "")
      %tileList = new ScriptObject(TileList)
      {
            key[1] = "tileA.prefab";
            key[2] = "tileB.prefab";
            key[3] = "tileC.prefab";
            key[4] = "tileD.prefab";
            key[5] = "tileE.prefab";
            key[6] = "tileF.prefab";
            key[7] = "tileG.prefab";
            key[8] = "tileH.prefab";
            key[9] = "tileI.prefab";
            key[10] = "tileJ.prefab";
            key[11] = "tileK.prefab";
            key[12] = "tileL.prefab";
            key[13] = "tileM.prefab";
            key[14] = "tileN.prefab";
            key[15] = "tileO.prefab";
            key[16] = "tileP.prefab";
            key[17] = "tileQ.prefab";
            key[18] = "tileR.prefab";
            key[19] = "tileS.prefab";
            key[20] = "tileT.prefab";
            key[21] = "tileU.prefab";
            key[22] = "tileV.prefab";
            key[23] = "tileW.prefab";
            key[24] = "tileX.prefab";
      };
   else
      %tileList = theLevelInfo.tileList;
      
   //setup a list of placeholders we'll delete later
   for(%i = 1; %i <= %count;%i++)
   {
      %temp[%i] = %tileList.key[%i];
   }
   
   //crate the array
   if(!isObject(cityArray))
      %cityArray = new ArrayObject(cityArray) {};
      
   MissionCleanup.add(%cityArray); 
   
   //add new elements to the array for each number of the count
   %dex = 0;
   while(%dex < %count)
   {
      //cycle through the numbers within our range
      for (%r = 1;%r <= %range;%r++) 
      {             
         %number = getRandom(1, %range);
       
         if (%temp[%number] $= "")
            continue;
         else
         {  
            %dex++;
            if(%dex > %count)
               break;    
            cityArray.add(%dex,%temp[%number]);      
            %temp[%number] = "";            
         }
      }
   }
}