Example of stereo image of surf.
MGL code:
call 'prepare2d' light on subplot 2 1 0:rotate 50 60+1:box:surf a subplot 2 1 1:rotate 50 60-1:box:surf a
C++ code:
void smgl_stereo(mglGraph *gr)
{
mglData a; mgls_prepare2d(&a);
gr->Light(true);
gr->SubPlot(2,1,0); gr->Rotate(50,60+1);
gr->Box(); gr->Surf(a);
gr->SubPlot(2,1,1); gr->Rotate(50,60-1);
gr->Box(); gr->Surf(a);
}