C++ Eigen initialize static matrix -

is possible initialize static eigen matrix4d in header file? want use global variable.

i'd along lines of:

static eigen::matrix4d foo = eigen::matrix4d(1, 2 ... 16);

or similar vectors:

static eigen::matrix4d foo = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16};

here link eigen matrix docs. can't seem find how there.

on lines of dawid's answer (which has small issue, see comments), can do:

static eigen::matrix4d foo = [] {     eigen::matrix4d tmp;     tmp << 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16;     return tmp; }();

return value optimization takes care of temporary, no worries copy.

Ruby Co