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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="en">
<head>
<meta HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
<link rel="stylesheet" type="text/css" href="style.css">
<TITLE>The Osirion Project - Editing the world</TITLE>
</head>
<body>
<H1>
The Osirion Project - Editing the world
</H1>
<p>
One of the goals of the project is to create a game world that is
easy to adapt and extend. At the moment of writing, the game reads the
world description from <i>ini/world.ini</i> and a list of buyable ships
from <i>ini/ships.ini</i>. These ini-files are plain text files that can be
edited with any text editor.
<p>
The world description files are server-side. This means that editing your local
copies will not affect the world when you connect to a remote server. Someone
connecting to your server will also receive your modified world.
<p>
I recommend you do not edit the original game data, but to make a copy
into your personal osirion directory. The files found in this directory will
get precedence over the original game data. Your modified files will be used
and the original files can still be updated when a new version is available.
<p>
On Linux your personal osirion directory is <i>~/.osirion</i>. On windows, your
personal osirion directory is the <i>home</i> subdirectory of the main distribution.
<h2>
File structure
</h2>
<p>
A world description files uses the windows ini-file syntax. Every section starts
with a section name enclosed in square brackets. For example, a section called
<i>planet</i> would look like:
<pre>
[planet]
</pre>
<p>
Every section contains a list of <i>value=key</i> pairs to describe the properties
for the current section. A planet would probably have a radius and a texture and the
planet section could look like:
<pre>
[planet]
radius=32
texture=planets/iceworld
</pre>
<p>
Lines starting with a semicolon are considered comments and are ignored:
<pre>
; The iceworld, a very dark and cold place
</pre>
<h2>
world.ini
</h2>
<p>
The <i>world.ini</i> file describes the objects in the game world and their basic properties.
In the context of the engine, an object is called an <i>entity</i>.
<h3>
[entity]
</h3>
<p>
Entities come in two flavours: basic geometrical shapes and entities with models. Both have a similar
definition and set of properties. A simple entity is considered decoration by the engine and won't change
direction or location.
<p>
Every in-game entity should have a <i>label</i> key. If the entity in question is going to be used as a base,
or any object the could be referenced in possible scripting, it should have a unique label. The label
should be lowercase and not contain spaces. A player-friendly name can be provided through the <i>name</i> key.
<table>
<tr>
<td class="wide"><i>label =</i></td>
<td class="narrow"><strong>[string]</strong></td>
<td>the in-game label of the entity</td>
</tr>
<tr>
<td class="wide"><i>name =</i></td>
<td class="narrow"><strong>[string]</strong></td>
<td>the in-game name of the entity</td>
</tr>
</table>
<p>
Set the <i>shape</i> key to define a basic geometrical shape:
<table>
<tr>
<td class="wide"><i>shape =</i></td>
<td class="narrow"><strong>axis</strong></td>
<td>a 3d-axis with X, Y and Z lines.
</tr>
<tr>
<td class="wide"></td>
<td class="narrow"><strong>cube</strong></td>
<td>a cube</td>
</tr>
<tr>
<td class="wide"></td>
<td class="narrow"><strong>diamond</strong></td>
<td>a regular octahedron with an axis</td>
</tr>
<tr>
<td class="wide"></td>
<td class="narrow"><strong>sphere</strong></td>
<td>a polyhedron approximation of a sphere</td>
</tr>
</table>
<p>
The size of the entity can be set with the <i>radius</i> key:
<table>
<tr>
<td class="wide"><i>radius =</i></td>
<td class="narrow"><strong>[float]<strong></td>
<td>the radius of the entity in game units</td>
</tr>
</table>
<p>
An entity with a model can be created by setting the <i>model</i> key. The radius of a model is automaticly
calculated:
<table>
<tr>
<td class="wide"><i>model =</i></td>
<td class="narrow"><strong>[string]</strong></td>
<td>filename of the model in the <i>maps/</i> directory, without extension.</td>
</tr>
</table>
<p>
The <i>color</i> key sets the colour of the entity.This colour will be used to draw the entity in case of
a geometrical shape, or to draw model faces that have the <i>common/entity</i> texture. The default entity colour is white.
<table>
<tr>
<td class="wide"><i>color =</i></td>
<td><strong>[float] [float] [float]</strong></td>
<td>entity colour with RGB values in the 0.0 - 1.0 or 0 - 255 range</td>
</tr>
</table>
<p>
The <i>location</i> sets the in-game position:
<table>
<tr>
<td class="wide"><i>location =</i></td>
<td><strong>[float] [float] [float]</strong></td>
<td>x, y, z values of the entity location, z is up</td>
</tr>
</table>
<p>
Orientation can be set thought the <i>direction</i>, <i>pitch</i>, and <i>roll</i> keys:
<table>
<tr>
<td class="wide"><i>direction =</i></td>
<td class="narrow"><strong>[float]</strong></td>
<td>direction angle the entity is pointing to. 0 degrees is north, 90 degrees is west, default is 0
</tr>
<tr>
<td class="wide"><i>pitch =</i></td>
<td class="narrow"><strong>[float]</strong></td>
<td>pitch angle, default is 0<td>
</tr>
<tr>
<td class="wide"><i>roll =</i></td>
<td class="narrow"><strong>[float]</strong></td>
<td>roll angle, default is 0<td>
</tr>
</table>
<h3>
[planet]
</h3>
<p>
A planet.
<h3>
[star]
</h3>
<p>
A star.
<h2>
ships.ini
</h2>
<p>
Ships that can be purchased go here.
</body>
</html>
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