Added TechDoc.txt file with some informations and some other little fixes

TechDoc.txt

@@ -0,0 +1,133 @@
+
+This file will hold some Details about the Game.
+A list of files and what every file is used for:
+
+field.c:
+  selecting a tileset
+  loading maps
+  generating maps
+  drawing the field
+
+bomb.c:
+  drawing bombs
+  drawing explosions
+  calculating and checking the explosions
+
+player.c:
+  drawing the player
+  moving the player
+  *calculating the new position of the players
+  checking for powerups
+	  
+chat.c:
+  drawing chatbox
+
+game.c:
+  the whole gameloop (multi and singleplayer)
+
+single.c:
+  creating a single game
+  *generating ai players
+  *moving the ai players
+  
+font.c:
+  drawing text on the screen
+  
+network.c:
+  network loop
+    - keeping ther network alife, like sending ping, checking for
+	  timeouts.
+    - doing the dynamic change of the send_pkg option
+	- this function will take care about all incomming network packets.
+  network init
+  network shutdown
+  update the clients for a new game
+  send to all players
+    - playerdata
+    - playermoves
+    - bombdata
+    - fielddata
+    - playerlist
+    - chat messages
+    - playerillness
+  delete a network player from a game
+  fills in the sockaddr from all the players
+  clean everything for a new network game
+
+netmenu.c:
+  network menu
+  join a game
+  host a game
+  network options
+
+packets.c:
+  everything what have to do with the network packet,
+  all send_* and all do_* function are defined in here.
+  send_packetname, do_packetname
+  
+  do_pkg
+  ------
+  will check the packet for wrong data network type
+  illegal packets, will delete the packet if we have got it already
+  do automatic pingreply or send the pkgack packet back.
+
+  send_pkg
+  --------
+  if the PKGF_ACKREQ flag is set it will cache the packet and check it if
+  it's reched the other side and if we have got the ACKPKG back.
+
+  holds an incoming index table of the last 256 (PKG_IN_INDEX_NUM) packets
+  so if one reches double in a certain time it will be ignored.
+	  
+pkgcache.c:
+  gives a pointer to a outgoing packet
+  add a outgoing packet
+    - function is only called from send_pkg
+    - only packet with PKGF_ackreq flag will cached
+  deletes a packet
+  len of an outgoing packet
+  resend cache loop
+    - function only called from network_loop
+    will resend after a timeout time a packet.
+    to make sure the packet got reched on the other side.
+
+configuration.c:
+  configuratio/option menu
+  read config
+  write config
+  change resolution menu
+  read program arguments
+  game startup init
+    - only called from the main function to set some variables at
+	  programstart
+
+gfx.c:
+  draw shadowed boxes
+  shading parts on the screen
+  draw background logo
+  draw shaded background logos
+  updates a list of parts from the screen
+    - gfx_UpdateRects   (updates all rects)
+	- gfx_AddUpdateRects(add a rect of the screen)
+  gets the color of an pixel on a surface
+  scaling of images
+  load/free playergraphics
+  load/free game data (fonts and background)
+  load/free tilesets
+  init/shutdown game graphics
+    - this function will calculate the best scaling size on the screen
+
+gamesrv.c:
+  communiaction with the game master server
+  adds a game to the master server
+  deletes a game from the masterserver
+  sends chat information to the master server
+  server selection menu
+  
+udp.c:
+  send messages
+  get messages
+  dns names
+  start/stop udp server
+
+  

src/basic.h

@@ -45,6 +45,7 @@
 #define LEN_GAMENAME 32
 #define LEN_PATHFILENAME 512
 #define LEN_FILENAME 256
+#define LEN_TILESETNAME 32
 
 #define DEFAULT_UDPPORT 11000
 #define DEFAULT_GMUDPPORT "11100"

src/configuration.c

@@ -44,7 +44,8 @@ game_init ()
     gfx.res.x = 640;
     gfx.res.y = 480;
 	gfx.bpp = 16;
-	sprintf (gfx.tileset,"default");
+	tileset[0] = 0;
+	random_tileset = 1;
     bman.fieldsize.x = 25;
     bman.fieldsize.y = 17;
     sprintf (bman.datapath, "data");

src/game.c

@@ -83,14 +83,16 @@ game_draw_info ()
 		draw_stone (x, bman.fieldsize.y-1);
 
 	if (debug) { /* do some debug informations on the screen */
-		sprintf (text, "Net Option: [");
+		sprintf (text, "NET_STAT: [");
 		for (i = 0 ; i < MAX_PLAYERS; i++)
 			sprintf (text, "%s%3d ", text, bman.players[i].net.pkgopt.send_set);
 		text[strlen(text)+1] = 0;
 		text[strlen(text)] = ']';
-		sprintf (text, "%s gfx_Rects:%d", text, UpdateRects_nr);
-		draw_text (0, gfx.res.y - gfx.font.size.y, text, 1);
-		gfx_AddUpdateRect (0, gfx.res.y - gfx.font.size.y, gfx.res.x, gfx.font.size.y);
+		sprintf (text, "%s GFX_RECTS:%d", text, UpdateRects_nr);
+		draw_text (0, gfx.res.y - (gfx.font.size.y << 1), text, 1);
+		
+		sprintf (text, "TILESET: %s", gfx.tileset);
+		gfx_AddUpdateRect (0, gfx.res.y - (gfx.font.size.y << 1), gfx.res.x, gfx.font.size.y << 1);
 	}
 	
 	if (chat.visible == 0) {

src/gfx.c

@@ -650,17 +650,18 @@ SDL_Surface *gfx_copyscreen (SDL_Rect *wnd) {
 };
 
 
-void gfx_load_tileset (char *tileset) {
+void gfx_load_tileset (char *tilesetname) {
     int i,
 	  r,
 	  g,
 	  b;
 			
-    char filename[255];
+    char filename[LEN_PATHFILENAME];
+	char tileset[LEN_TILESETNAME];
     SDL_Surface *tmpimage, *tmpimage1;
 	float sfkt;
 
-	d_printf ("Loading Tileset\n");
+	d_printf ("Loading Tileset: %s\n", tileset);
 	
 	/* Calculate the Best Size of the Images */
 	gfx.block.x = gfx.res.x / (bman.fieldsize.x+1);
@@ -673,7 +674,6 @@ void gfx_load_tileset (char *tileset) {
 	
 	/* create Table of points */
 	scale (gfx.postab, gfx.block.x, 256);
-	
 	sfkt = ((float) gfx.block.x) / ((float) GFX_IMGSIZE);
 	
     /* calculating the best offset for the field on the screen */
@@ -684,8 +684,20 @@ void gfx_load_tileset (char *tileset) {
     sprintf (filename, "%s/tileset/%s/fire.bmp", bman.datapath,tileset);
     tmpimage = SDL_LoadBMP (filename);
     if (tmpimage == NULL) {
-        printf ("Can't load image: %s\n", SDL_GetError ());
-        exit (1);
+		/* file could not be load, so load teh default tileset */
+        printf ("Can't load tileset: %s\n", SDL_GetError ());
+		if (strcmp (tileset, "default") != 0) {
+			strcpy (tileset, "default");
+			sprintf (filename, "%s/tileset/%s/fire.bmp", bman.datapath,tileset);
+			tmpimage = SDL_LoadBMP (filename);
+			if (tmpimage == NULL) {
+				printf ("default tileset could not be loaded.\n");
+				exit (1);
+			}
+			else
+				printf ("switching to default tileset.\n");
+		}
+		else exit (1);
     }
     gfx.fire.frames = tmpimage->h / GFX_IMGSIZE;
 	tmpimage1 = scale_image (tmpimage, (tmpimage->w / GFX_IMGSIZE) * gfx.block.x, gfx.fire.frames * gfx.block.y);
@@ -694,7 +706,6 @@ void gfx_load_tileset (char *tileset) {
     gfx.fire.image = SDL_DisplayFormat (tmpimage1);
 	SDL_FreeSurface (tmpimage);
     SDL_FreeSurface (tmpimage1);
-
 	
     /* load the bomb */
     sprintf (filename, "%s/tileset/%s/bomb.bmp", bman.datapath, tileset);

src/gfx.h

@@ -52,7 +52,8 @@ struct __gfx {
 	
 	_gfxani menuselect; // The Menu Select GFX (the bomb ?)
 	
-	char tileset[255];   // pathname to the tileset 
+	int random_tileset;		// random selecting of a tileset
+	char tileset[LEN_TILESETNAME];   // name of the tileset
 	
     SDL_Surface *logo;
 } typedef _gfx;

src/netmenu.c

@@ -13,7 +13,9 @@ void
 networkmenu_joingame ()
 {
     int i;
+
     gamesrv_getserver ();
+
     for (i = 0; bman.servername[i] != 0; i++)
         if (bman.servername[i] == ' ')
             bman.servername[i] = ':';

src/network.c

@@ -1,4 +1,4 @@
-/* $Id: network.c,v 1.13 2003/05/06 12:25:30 stpohle Exp $ */
+/* $Id: network.c,v 1.14 2003/05/06 17:47:13 stpohle Exp $ */
 /*
 	network routines.
 */
@@ -723,8 +723,8 @@ net_game_send_ill (int p_nr)
 
 
 /*
-  this routine is only for the server.
-  after this the data should be transfered to the other clients.
+   this routine will set up some things for the network game
+   after this the data should be transfered to the other clients.
 */
 void
 net_new_game ()

src/packets.c

@@ -267,6 +267,7 @@ do_servermode (struct pkg_servermode *s_mod, _net_addr * addr)
         bman.fieldsize.x = s_mod->fieldsize_x;
         bman.fieldsize.y = s_mod->fieldsize_y;
     }
+	strncpy (gfx.tileset, s_mod.tileset, LEN_TILESETNAME);
 };
 
 
@@ -288,6 +289,7 @@ send_servermode (_net_addr * addr, int pl_nr)
     s_mod.last_winner = bman.lastwinner;
     s_mod.fieldsize_x = bman.fieldsize.x;
     s_mod.fieldsize_y = bman.fieldsize.y;
+	strncpy (s_mod.tileset, gfx.tileset, LEN_TILESETNAME);
     send_pkg ((struct pkg *) &s_mod, addr);
 };
 
@@ -978,6 +980,10 @@ do_pkg (struct pkg *packet, _net_addr * addr)
         return 0;
     }
 
+	/* check if the incoming packet have the right size */
+	if (packet->h.tye == PKG_servermode && packet->h.len != sizeof (pkg_servermode))
+		send_error (addr, "pkg_servermode: packetsize incorrect.");
+
     switch (packet->h.typ) {
     case (PKG_error):
         if (do_error ((struct pkg_error *) packet, addr) < 0)

src/packets.h

@@ -88,9 +88,11 @@ struct pkg_servermode {
 	signed char last_winner;
 	signed char fieldsize_x;
 	signed char fieldsize_y;
+	char tileset [LEN_TILESETNAME];
     signed char pl_nr;      /* if the server sends this to a client... 
                                it will be the clients in_nr number 
                                (-1) for not set */
+
 };