Hi Monks:). I know monks are professional perler:) My question is where is easy and nice module to combine polygon.. I searched all of perl module site. and I got Math::polygon. This module gave me many functions. There are calculating area, perimeter, searching point in polygon etc.. But I want to achieve to combine polygons. Unfortunately that module has not that function.. Below examples, I show only rectangular but it is not always rectangular, sometimes polygons.. Also that polygons have not hole and always have minimum 5 points. Is there any nice idea? or modules you know to combine polygons? I couldn't sleep because of that problems.. Please help me 
#case 1 => There is common area. merge case
my @poly1 = ([0,0],[0,2],[2,2],[2,0],[0,0]);
my @poly2 = ([0,0],[3,0],[3,1],[0,1],[0,0]);
my @merge_poly12;
print ("@merge_poly12\n"); #then I want to print [0,0],[0,2],[2,2],[2,
+1],[3,1],[3,0],[0,0];

#case 2 => There is not common area, No merge
my @poly1 = ([0,0],[0,2],[2,2],[2,0],[0,0]);
my @poly3 = ([3,0],[3,2],[4,2],[4,0],[3,0]);
my @merge_poly13;
print ("@merge_poly13\n"); # then I want to print nothing or only @pol
+y1.

#case 3 => There is not common area, But have line, Merge case
my @poly1 = ([0,0],[0,2],[2,2],[2,0],[0,0]);
my @poly4 = ([0,2],[0,3],[1,3],[1,2],[0,2]);
my @merge_poly13;
print ("@merge_poly14\n");  # then I want to print [0,0],[0,3],[1,3],[
+1,2],[2,2],[2,0],[0,0]

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In reply to combine(merge) polygons by dideod.yang

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