so, is it legal to use source code from papers and such:
like this paper on perlin noise:
links to this source code:
and stam's famous talk on fluid dynamics, includes source code throughout, annotated with instructions like "add these macros to the beginning of your code"
I'm just not sure if it's legal to copy and paste this to use in your own commercial code.
if I were to make my own implementation, it would end up being close to identical, since I'd probably use the source code as a reference. I know very little about copyright law, including how it applies in these situations, and I can never find usage and licensing terms for these. Nor did googling any terms I could think of provide me the specific answer I need.
does anyone know for sure what the rules/laws are here, or where I can find the answer?