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                         <<  G.O.D. v0.8  >>
                    Gravitational Orbits Designer
                Copyright (C) 1993 by Filippo Portera
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WHAT IS IT ?:

  G.O.D. simulates space objects motion in their gravitational field.
  Each object attracts other objects with a force described by the 
Newton gravitional force law:
                    M1 * M2
           F = G * ---------
                       rý

where G is a costant, M1  and M2 are the masses of the two objects, r 
is their space distance.
  G.O.D. allows an interactive modelling of objects in a bidimensional 
space and then starts to calculate the orbit of each planet following 
some user customized parameters.

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PARAMETERS:

G, acceleration costant: increase or decrease the attractive force of 
objects (try values very very large (e.g.: 1.0E+30) and strange things
will appear);

Color Rate: modify choice of orbits draw colors.

Radius ratio: space dimension of the suns.

ët: time period for orbits calculation (values next to 0 assure better
    accuracy).

Lock suns: 'No' to permit suns motion,'Yes' to lock suns.

Video mode: change the resolution and number of colors on the screen.

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INSTRUCTIONS:

  Systems drawing is very simple:
  - select 'Draw' from root menu;
  - place suns with mouse pointer clicking left mouse button;
  - click right mouse button;
  - place planets and sets their initial velocity with left mouse 
    button (segment length is modulo and segment orientation is 
    direction);
  - click right mouse button;

  It's also possible to save and load system configurations with 
selection of these options in the root menu.
  After loading a system, select 'Redraw' from root menu to start 
drawing saved data.

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VIDEO MODES:

  SuperVGA 16-color
   A) Standard EGA/VGA 320x200x16
   C) Standard EGA/VGA 640x350x16
   D) Standard VGA 640x480x16
   E) SuperVGA/VESA 800x600x16
   F) SuperVGA/VESA 1024x768x16

  SuperVGA 256-color
   G) Standard VGA/MCGA 320x200x256
   I) 512k Svga/VESA 640x480x256
   J) 512k Svga/VESA 800x600x256
   K) 1024k Svga/VESA 1024x768x256

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NOTE:

 * The program needs mouse.
 * I've used only TSENG LAB 4000 video cards, so i dunno if it will 
   run on TRIDENT, GENOA, etc... in high resolution.

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FILES:

        GOD.EXE            Program with emulated FP processor 
                           (uses 6 bytes length real numbers);
        GODCOST.DAT        GOD.EXE configuration file;
        SYSTCOST.DAT       Examples saved with GOD.EXE

        GOD87.EXE          Needs math-coprocessor 
                           (works with 10 bytes length real numbers and
                           it's 3,4 times faster than the emulation 
                           version)
        GODCO87.DAT        GOD87.EXE configuration file;
        SYSTCO87.DAT       Examples saved with GOD87.EXE

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:
  I have decided to release this program free of charge,
although donations would be greatly appreciated and certainly
expedite the release of future and more interesting versions,
like some kind of 3D jam, Windows(TM) running, etc... :->

Please send money/BTP/CCT/postcards/stamps to:

	Filippo Portera
	Via Cellini 2/A
	30038 Spinea (VENICE) ITALY

For hints, bugs extermination and everything you wanna tell me, 
write to:

 fportera@quack.dsi.unive.it  (E-Mail internet address)

*===============================*==========================================*
| Filippo Portera               |  Internet: fportera@quack.dsi.unive.it   |
| Via Cellini 2/A               |                                          |
| 30038 Spinea (VE) ITALY       |                                          |
*===============================*==========================================*