version 1, including all changes.
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SSYSTEM |
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!!!SSYSTEM |
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NAME |
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SYNOPSIS |
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DESCRIPTION |
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OPTIONS |
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PERFORMANCE |
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KEYBOARD BINDINGS: |
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FILES |
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ACKNOWLEDGEMENTS |
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AUTHOR |
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BUGS |
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---- |
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!!NAME |
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ssystem - Solar System Simulator |
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!!SYNOPSIS |
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__ssystem__ [[ __-bench__ ] [[ __-slices__ ''N'' ] |
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[[ __-stacks__ ''N'' ] |
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!!DESCRIPTION |
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This document describes the Debian installation of |
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__ssystem__. ssystem is an OpenGL Solar System simulator. |
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Only the Sun , the nine planets and a few major satellites |
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are included. Background stars are also |
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included. |
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Although ssystem is not 100% accurate the author tried to |
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keep it as close to reality as possible. Starting with |
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version 1.1 all planets' data except planets' radii, which |
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are scaled up for easier visualization, should be correct |
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(within the accuracy limit of the new planet positioning |
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algorithm, see positions.c for details). |
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!!OPTIONS |
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Ssystem takes the following command line |
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options. |
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__-bench__ |
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Aborts program execution after 1000 frames, displaying |
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framerate. |
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__-slices__ |
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Sets sphere SLICES parameter to N |
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__-stacks__ |
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Sets sphere SLICES parameter to N |
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These two last options (slices and stacks) have a great |
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performace impact (see Performance section) |
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!!PERFORMANCE |
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Hardware acceleration is not required, but highly |
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recommended for smooth framerates. I get 48fps (running on |
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Linux) with the |
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Default value for SLICES and STACKS is 12 but you can play |
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with these values in the command line (see Command line |
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options section). Depending on your system you may start |
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trying with the following values: |
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SLICES STACKS |
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Pentium 60 and below 8 6 |
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Pentium 100-166 10 10 |
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Pentium 200-266 12 12 |
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Pentium II 233 16 14 |
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Pentium II 300 20 18 |
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!!KEYBOARD BINDINGS: |
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Home/End: Selects previous/next body. |
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h : Online help |
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f : Flat/Smooth shading model. |
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t : Texture on/off. |
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l : Lighting on/off. |
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s : Stars on/off. |
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d : Demo mode on/off. |
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n : Moves camera near current planet. |
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c : Toggle between free and linked to planet camera |
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modes. |
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p : Pause |
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Hold SHIFT for faster operation in the following key |
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bindings: |
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+/-: Increase/Decrease time factor. |
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Arrow keys: Rotate camera. |
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Page Up/Down: Increase/decrease speed. |
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Camera movement: |
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Default camera mode is free. In this mode Arrow keys rotates |
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camera, |
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Page Up/Down increase/decrease camera speed. |
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Linked mode is a bit different, here arrow keys are useless. |
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You can move the camera towards the planet by increasing |
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speed. Once you're near the planet program sets camera speed |
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to zero. |
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Camera speed is limited to 10000 Km/iteration (1 iteration = |
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1 frame), which is light speed at 30 |
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frames/sec. |
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!!FILES |
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''/usr/doc/ssystem |
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/usr/bin/ssystem |
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/usr/lib/ssystem'' |
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!!ACKNOWLEDGEMENTS |
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-Brian Paul (Mesa) |
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http://www.ssec.wisc.edu/~brianp/MesQ.html |
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-Daryll Strauss (Linux Glide) |
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-David Bucciarelli (Mesa 3dfx driver) |
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http://www-hmw.caribel.pisa.it/fxmesa/index.shtml |
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-Curtis L. Olson (star catalog stuff) |
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-This software is based in part on the work of The |
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Independent JPEG Group |
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-Galilean and Saturn satellites computed using code |
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extracted with permission from XEphem, (c) 1997 Elwood |
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Charles Downey |
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http://iraf.noao.edu/~ecdowney/xephem.html |
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-Keith Burnett's planet positioning algorithm used with |
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persmission. |
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http://www.xylem.demon.co.uk/kepler/ |
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-Nacho (beta testing) |
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-And of course, thanks to all of you who help me with |
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suggestions and tips. |
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Check ssytem homepage for updates |
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(http://www1.las.es/~amil/ssystem). |
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!!AUTHOR |
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Raul Alonso |
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This man page created from documents written by the author |
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of ssystem by John Lapeyre |
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!!BUGS |
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Outer bodies movement is a bit jerky. Although ssystem uses |
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double precision floating point arithmetic, Mesa uses simple |
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precision arithmetic internally (faster and precise enough |
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for most aplications). I'm working on it. |
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---- |
