doc/api/a00086_source.html

 #pragma once
 #include "../detail/type_mat2x2.hpp"

 namespace glm
 {

     typedef mat<2, 2, double, defaultp>     dmat2x2;

     typedef mat<2, 2, double, defaultp>     dmat2;

 }//namespace glm
glm::dmat2
mat< 2, 2, double, defaultp > dmat2
2 columns of 2 components matrix of double-precision floating-point numbers.
Definition: matrix_double2x2.hpp:20

glm
Definition: common.hpp:20

glm::dmat2x2
mat< 2, 2, double, defaultp > dmat2x2
2 columns of 2 components matrix of double-precision floating-point numbers.
Definition: matrix_double2x2.hpp:15