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Sphertis
by SICK, the Slightly Intelligent Crazy Rosebi

http://tertis.sourceforge.net/

See INSTALL to build and install.

No, it doesn't do much.
Yes, I'm working on it.

Textures from http://maps.jpl.nasa.gov/

NOTES

Yes, startup is slow. I want to cache.
Yes, the planet leaves a trace behind when it moves. Yes, the gameplay is quite primitive.
Yes, it is still poorly architected.
Yes, the rendering of the text is blocky. Yes, special effects are missing.
Yes, the sound effect is bad.
Yes, it is hard to play on the dark side of Venus. Yes, autorepeat/sliding is not working. Yes, the warping is too harsh.
Yes, the play area is too big.
Yes, the interplay of horizontal and vertical motion and clouds, planets and lighting are physically incorrect. No, I don't start esd.
No, I don't use esd well. I don't know if I should use it at all. But mikmod had a huge lag. But some of it is functional.

Yes, it is designed to mess with your eyes.

TODO

External GUI configurator. With sphertis -demo to check the params.

A filter to transform a horizontal planetary surface to a vertical surface. Seems relatively straightforward.

Stencil masks are applicable at no cost.

Can do orbitals in addition to sphere.

General idea:
sphere with stencilled out orbital
orbital above sphere with text

           ....
         ..    ..
        .########.
      ##############
    #####        #####
    ## .          . ##
      #.        .#
         ..    ..
           ....

and the orbital could cast a shadow ;}

Could look at saturnalia but probably a costly alpha particle system..