visualize terrain maps as triangle meshes by default, fixes #497.
visualize terrain maps as triangle meshes by default, fixes #497.

the user can use the gui to switch back to points visualization

openhumanoids/oh-distro,openhumanoids/oh-distro,openhumanoids/oh-distro,openhumanoids/oh-distro,openhumanoids/oh-distro,openhumanoids/oh-distro,openhumanoids/oh-distro,openhumanoids/oh-distro