Show GL matrix storage

gistfile1.md

this code

void printMat(const char* l) {
    float mat[16] = { 0, };
    glGetFloatv(GL_MODELVIEW_MATRIX, mat);
    printf("%s\n", l);
    printf("%f %f %f %f\n", mat[0], mat[1], mat[2], mat[3]);
    printf("%f %f %f %f\n", mat[4], mat[5], mat[6], mat[7]);
    printf("%f %f %f %f\n", mat[8], mat[9], mat[10], mat[11]);
    printf("%f %f %f %f\n", mat[12], mat[13], mat[14], mat[15]);
}

... 

glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
printMat("--before--");
glTranslatef(1.0f, 2.0f, 3.0f);
printMat("--trans--");

prints this

--before--
1.000000 0.000000 0.000000 0.000000
0.000000 1.000000 0.000000 0.000000
0.000000 0.000000 1.000000 0.000000
0.000000 0.000000 0.000000 1.000000
--trans--
1.000000 0.000000 0.000000 0.000000
0.000000 1.000000 0.000000 0.000000
0.000000 0.000000 1.000000 0.000000
1.000000 2.000000 3.000000 1.000000

Showing that the storage format of matrices in GL is

xAxis.x, xAxis.y, xAxis.z, 0,
yAxis.x, yAxis.y, yAxis.z, 0,
zAxis.x, zAxis.y, zAxis.z, 0,
translation.x, translation.y, translation.z, 1