This commit switches the Cartesian -> IJK decomposition in GridDims from K->J->I into the I->J->K order. The latter is simpler. While here, also consistently use 'std::size_t' instead of 'size_t'.
This commit switches the Cartesian -> IJK decomposition in GridDims from K->J->I into the I->J->K order. The latter is simpler. While here, also consistently use 'std::size_t' instead of 'size_t'.