#113 Several for Earth Flicks

[Loren Petrich]

I have several feature requests for Earth Flicks; I'm
asking about that instead of about World Wind because
there is still not yet a MacOS-X version of WW.

* Loading of image files and control files residing on
local disks or from arbitrary URL's. I wish to display
continental-drift animations with EF; I have the files,
and I'd once created a similar sort of globe viewer
with Java3D.

* Use of projections and image sizes other than
power-of-2 full-size rectangular, like rectangular and
Mollweide over subsets of the image.

* Use of any image-file formats that Java supports,
like typical Internet ones like GIF, JPEG, and PNG.

* More generalized mouse dragging of the globe that can
make north-south depart from up-down.

* Illumination, like from the view direction. That can
give the globe an appearance of depth. It need not be
fancy; Gouraud shading should suffice, and it can
easily be implemented with vertex colors.

* Display of lines of latitude and longitude.

I might be willing to try implementing them myself,
though for that, I'd like to know where to be pointed
in the code to handle loaded data, mouse tracking, and
so forth.