From 221f8b42adeb776e10944a5ed3835b8f00434985 Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Wed, 5 Jan 2011 13:26:58 +0000
Subject: Added some structure to allow pluggable display drivers.

---
 BUILD         | 24 +++++++++++++++++-------
 config/config | 30 ++++++++++++++++++++++++++++++
 driver/BUILD  | 18 ++++++++++++++++++
 3 files changed, 65 insertions(+), 7 deletions(-)
 create mode 100644 driver/BUILD

diff --git a/BUILD b/BUILD
index e7b3102..d5a19b5 100644
--- a/BUILD
+++ b/BUILD
@@ -1,17 +1,27 @@
 
-sdlgrav has the following dependencies:
+grav has the following dependencies:
 
-    * SDL 1.2
     * GNU Multiple Precision Arithmetic Library
-    * OpenGL
 
 
-To build sdlgrav:
+To build grav:
 
-$ cd sdlgrav
+$ cd grav
 $ make depend
 $ make
 
+This will generate the executable, grav.  See INSTRUCTIONS for instructions on
+how to use the software.
+
+Note that grav cannot display by itself, but uses plugins to display the
+simulated systems.  There is in-built support for displaying information to
+stdout in the abscence of any other display.
+
+The instructions for building display drivers can be found in the driver
+directory.
+
+    * SDL 1.2
+    * SDL Image
+    * OpenGL
+
 
-This will generate the stand-alone executable, sdlgrav.  See INSTRUCTIONS for
-instructions on how to use the software.
diff --git a/config/config b/config/config
index 1f6b18a..08a7a4a 100644
--- a/config/config
+++ b/config/config
@@ -1,2 +1,32 @@
 # Example configuration file
 #
+#
+# General format is:
+#
+# [section]
+# variable = value
+#
+# Any blank lines or lines starting with a comment are ignored.
+#
+
+
+# This defines any textures to load, and the names applied to them.  Any image
+# format supported by SDL Image should be loadable.
+#
+[textures]
+example1 = files/file.png
+example2 = files/file.png
+
+
+# This enables or disables various graphical effects.  The defaults for the
+# effects are given here.
+#
+[gfx]
+trails = yes
+
+
+# This defines the bodies that will be placed in the simulation.
+#
+[universe]
+body = sun
+body = planet
diff --git a/driver/BUILD b/driver/BUILD
new file mode 100644
index 0000000..ae16a7a
--- /dev/null
+++ b/driver/BUILD
@@ -0,0 +1,18 @@
+
+The following display drivers are available:
+
+SDL-GL	[NOT YET AVAILABLE]
+
+    Displays using OpenGL and SDL.  Require the following:
+
+	* SDL 1.2
+	* SDL Image
+	* OpenGL
+
+    To make:
+
+    	$ cd sdl-gl
+	$ make depend
+	$ make
+
+    This generates sdl-gl.so
-- 
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