Object orrientation

I'm having a problem at the moment with trying to find a library routine ( JUST ONE) that can 'Construct a warp transform that approximatively maps the given source coordinates to the given destination coordinates.' 

My opitions are do it from scratch or try to find something in java that does it. The problem is that the only library that does it is 19Mb big with a complex linkage of classes meaning if you add one you have to add them all (practically).  The use of all these helper classes ( my point2d, mymatrix ) makes it all so tempting to try to figure out the code your self. 

Is this a problem with OOP or how we use it.