The first file is just a silly way to demonstrate the basic usage of shell scripting (bash) in UNIX/Linux env.

The second one, works under cygwin and it set some parameters for raytracer, and then run it.

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The Snell and Frensel are implemented. The acoustic effect is also implemented.

Different objects with different Ref. index and nested glass is also done.

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For KDTree, on each level the space is getting separated on X, Y, Z axises repeatedly.

The speed increases dramatically when the depth increases, the speedup is shown below for depth=4, 8, 12, 16, 20

with depth 20 or more, there is no considerable speedup for KDTree. Since, the major times is due to loading obj files and build the tree.

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