gamasutra.com — In games today, more and more realistic effects are expected, and the best way to get them is by using the correct physical models. The problem many of these models share is that they are represented with partial differential equations (PDE). The solving of this type of equation is often avoided by using different types of tricks. It is sad to say, but in the end tricks are just tricks, and they don't give the correct solution - just something that looks like it.
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