doc/api/a00134_source.html

 #pragma once
 #include "../detail/type_mat4x4.hpp"

 namespace glm
 {

     typedef mat<4, 4, double, defaultp>     dmat4x4;

     typedef mat<4, 4, double, defaultp>     dmat4;

 }//namespace glm
glm::dmat4x4
mat< 4, 4, double, defaultp > dmat4x4
4 columns of 4 components matrix of double-precision floating-point numbers.
Definition: matrix_double4x4.hpp:15

glm::dmat4
mat< 4, 4, double, defaultp > dmat4
4 columns of 4 components matrix of double-precision floating-point numbers.
Definition: matrix_double4x4.hpp:20

glm
Definition: common.hpp:20