From 103ac6931ebe2b4be7fd8e6d6544463193b6f665 Mon Sep 17 00:00:00 2001
From: Garux <garux@mail.ru>
Date: Sun, 8 Nov 2020 13:04:29 +0300
Subject: [PATCH] * fix -fixaas

---
 tools/quake3/q3map2/convert_bsp.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/quake3/q3map2/convert_bsp.c b/tools/quake3/q3map2/convert_bsp.c
index 395e43c1..f717e14c 100644
--- a/tools/quake3/q3map2/convert_bsp.c
+++ b/tools/quake3/q3map2/convert_bsp.c
@@ -33,6 +33,11 @@
 
 
 
+static void AAS_DData( unsigned char *data, int size ){
+	for ( int i = 0; i < size; i++ )
+		data[i] ^= (unsigned char) i * 119;
+}
+
 /*
    FixAAS()
    resets an aas checksum to match the given BSP
@@ -72,6 +77,7 @@ int FixAAS( int argc, char **argv ){
 	/* create bsp checksum */
 	Sys_Printf( "Creating checksum...\n" );
 	checksum = LittleLong( (int)Com_BlockChecksum( buffer, length ) ); // md4 checksum for a block of data
+	AAS_DData( (unsigned char *) &checksum, 4 );
 
 	/* write checksum to aas */
 	ext = exts;
@@ -88,7 +94,7 @@ int FixAAS( int argc, char **argv ){
 		if ( !file ) {
 			continue;
 		}
-		if ( fwrite( &checksum, 4, 1, file ) != 1 ) {
+		if ( fseek( file, 8, SEEK_SET ) != 0 || fwrite( &checksum, 4, 1, file ) != 1 ) {
 			Error( "Error writing checksum to %s", aas );
 		}
 		fclose( file );