New multi-resolution TexturedLayer

[Ian Mayo]

Lance had an idea: {{{ #!text

I was thinking, and decided that it might be worth it to figure out how the TexturedLayer draws the ocean surface. As it turns out, it makes a plain grid of points along the surface in the sector. It then does a simple triangular tessellation using the opengl triangle strip. While this is a good and simple implementation, it doesn't really fit our use of it. I was thinking that perhaps I could implement functionality such that a thin strip of high density triangles would follow the coast, and then use the current TexturedLayer for all open water, with very low density. This, combined with only rendering the current visible sector, would improve rendering, as well as improving the appearance of the ocean surface. Let me know what you think. }}}

Let's not lose it.