pointvec/sources/scripts/pos.js

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function Pos(x,y)
{
this.x = x;
this.y = y;
this.toString = function()
{
return x+","+y;
}
this.sub = function(pos2)
{
return new Pos(this.x - pos2.x,this.y - pos2.y)
}
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this.is_equal = function(pos2)
{
return pos2.x == this.x && pos2.y == this.y;
}
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}