Fix a small tile cache bug.

[flightgear.git] / README.gpc

diff --git a/README.gpc b/README.gpc
index e27ea778976ea26b6e181907748b4498d2f19b7b..f58ba8077262f1cca8cb5f0156756df547ba9407 100644 (file)
--- a/README.gpc
+++ b/README.gpc
@@ -12,29 +12,40 @@ distribution.
 
 This library comes as a single source file and header with no build
 directions.  So, here are some directions contributed by Riley Rainey
-<riley.rainey@websimulations.com>:
+<riley.rainey@websimulations.com> with additional notes by Curt Olson:
 
 
 1. Download the GPC library source code from URL:
 
        http://www.cs.man.ac.uk/aig/staff/alan/software
 
-2. Unpack it; the current version seems to be 2.22:
+2. Unpack it; the current version seems to be 2.30:
 
-       $ zcat gpc222.tar.Z | tar xvf -
+       $ zcat gpc231.tar.Z | tar xvf -
 
-3. Copy in the Makefile attached to this message:
+3. ***IMPORTANT STEP*** ***DO NOT SKIP***
 
-       $ cp Makefile ./gpc222
+   This is important step if you want to use gpc to generate quality
+   scenery!
 
-4. Check install paths.  Edit the Makefile and make sure the install
+   Before building the library, edit the gpc.h file and change
+   GPC_EPSILON to something bigger.  You may experiment with this
+   value, but the following seems to work well for me:
+
+       #define GPC_EPSILON (0.000001)
+
+4. Copy in the Makefile attached to this message:
+
+       $ cp Makefile ./gpc231
+
+5. Check install paths.  Edit the Makefile and make sure the install
    paths are satisfactory.  Also make sure that all the make commands
    have leading tabs (i.e. that the tabs aren't expanded out into 8
    spaces) otherwise the make will fail.
 
-5. Build and install it:
+6. Build and install it:
 
-       $ cd ./gpc222
+       $ cd ./gpc231
        $ make
        $ su
        Password:
@@ -43,7 +54,7 @@ directions.  So, here are some directions contributed by Riley Rainey
 
 -------------------------- snip ------------------------------
 
-# Unix/Linux makefile for GPC 2.22
+# Unix/Linux makefile for GPC 2.31
 #
 # Riley Rainey  (riley.rainey@websimulations.com)