function [c1,c2]= OrderXover(p1,p2,bounds,Ops)
// Orderbased crossover takes two parents P1,P2 and performs  order
// based crossover by Davis.  
//
// function [c1,c2] = orderbasedXover(p1,p2,bounds,Ops)
// p1      - the first parent ( [solution string function value] )
// p2      - the second parent ( [solution string function value] )
// bounds  - the bounds matrix for the solution space
// Ops     - Options matrix for simple crossover [gen #SimpXovers].

rng         = (bounds(:,2)-bounds(:,1))';         // The variable ranges'
numArranges     = rng + 1; 		          // Number of each arrages
cumArranges = cumsum([0 numArranges]);
xZomeLength = sum(numArranges)+1; 		  // Length of string is numVar + fit
c1=p1;
c2=p2;
if(p1(1:xZomeLength)==p2(1:xZomeLength)),return,end;
for i= 1:size(numArranges,2)
    sz=numArranges(i);
    pfrom=(cumArranges(i)+1);
    pto=cumArranges(i+1);
    cut1 = ceil(rand(1)*sz);                          // Generate random cut point U(1,n)
    cut2 = ceil(rand(1)*sz);                          // Generate random cut point U(1,n)
    if ( (~(cut1==cut2)) & abs(cut1-cut2)<(sz-1) )
        if (cut1>cut2)
            temp=cut2;
            cut2=cut1;
            cut1=temp;
        end
        part1 = [p1(pfrom:pto) p1(pfrom:pto)];
        part2 = [p2(pfrom:pto) p2(pfrom:pto)];
        pm1=part1(cut1:sz+cut1-1);
        pm2=part2(cut1:sz+cut1-1);
        for i=pfrom+cut1-1:pfrom+cut2-1
            pm1=strrep(pm1,p2(i),-1);
            pm2=strrep(pm2,p1(i),-1);
        end
        a=pm1(find(pm1(1:(cut2-cut1+1))>0));
        //c=pm1((2+cut2-cut1):end);
        //b=pm1(find(c)>0);
        b=pm1((cut2-cut1+1)+find(pm1((2+cut2-cut1):end)>0));
        c1(pfrom:pto)=[ a part2(cut1:cut2) b ];
        a=pm2(find(pm2(1:(cut2-cut1+1))>0));
        b=pm2((cut2-cut1+1)+find(pm2((2+cut2-cut1):end)>0));
        c2(pfrom:pto)=[ a part1(cut1:cut2) b ];
        end
    end

end