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Support sampling 3D texture generators

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This commit is contained in:
Nikita Lisitsa 2020-12-13 22:40:17 +03:00
parent f3184a0f62
commit b7fdc4959e
1 changed files with 29 additions and 0 deletions
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29
libs/pcg/include/psemek/pcg/sample.hpp
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@ -20,6 +20,25 @@ namespace psemek::pcg
} }
} }
template <typename Gen, typename R>
void sample(Gen && gen, util::array<R, 3> & result)
{
for (std::size_t k = 0; k < result.height(); ++k)
{
for (std::size_t j = 0; j < result.height(); ++j)
{
for (std::size_t i = 0; i < result.width(); ++i)
{
float ti = (i + 0.5f) / result.width();
float tj = (j + 0.5f) / result.height();
float tk = (k + 0.5f) / result.depth();
result(i, j, k) = gen(ti, tj, tk);
}
}
}
}
template <typename Gen> template <typename Gen>
auto sample(Gen && gen, std::size_t width, std::size_t height) auto sample(Gen && gen, std::size_t width, std::size_t height)
{ {
@ -31,5 +50,15 @@ namespace psemek::pcg
return result; return result;
} }
template <typename Gen>
auto sample(Gen && gen, std::size_t width, std::size_t height, std::size_t depth)
{
using R = decltype(gen(0.f, 0.f, 0.f));
util::array<R, 3> result({width, height, depth});
sample(std::forward<Gen>(gen), result);
return result;
}
} }