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#pragma once
#include <array>
class Cuboid {
private:
const std::array<std::size_t,3> _size;
const std::size_t _volume;
public:
Cuboid(std::size_t nX, std::size_t nY, std::size_t nZ):
_size{nX, nY, nZ},
_volume(nX*nY*nZ) { }
std::size_t volume() const {
return _volume;
}
std::size_t index(unsigned iX, unsigned iY, unsigned iZ) const {
return iX*_size[1]*_size[2] + iY*_size[2] + iZ;
}
int operator[](unsigned i) const {
return _size[i];
}
template <typename F>
void traverse(F f) {
for (int iX = 0; iX < _size[0]; ++iX) {
for (int iY = 0; iY < _size[1]; ++iY) {
for (int iZ = 0; iZ < _size[2]; ++iZ) {
f(iX, iY, iZ, index(iX,iY,iZ));
}
}
}
}
};
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