Add some more code comments

src/doom/p_map.c

@@ -1369,6 +1369,7 @@ boolean PIT_ChangeSector (mobj_t*	thing)
 	mo = P_SpawnMobj (thing->x,
 			  thing->y,
 			  thing->z + thing->height/2, MT_BLOOD);
+	// [crispy] connect blood object with the monster that bleeds it
 	mo->target = thing;
 
 	mo->momx = (P_Random() - P_Random ())<<12;

src/doom/p_mobj.c

@@ -902,6 +902,7 @@ P_SpawnBlood
     th = P_SpawnMobj (x,y,z, MT_BLOOD);
     th->momz = FRACUNIT*2;
     th->tics -= P_Random()&3;
+    // [crispy] connect blood object with the monster that bleeds it
     th->target = target;
 
     if (target->flags & MF_SHADOW) // Spectres bleed spectre blood

src/doom/r_data.c

@@ -688,6 +688,36 @@ void R_InitSpriteLumps (void)
 
 // [crispy] from boom202s/R_DATA.C:676-787
 
+// Emacs style mode select   -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// $Id: r_data.c,v 1.24 1998/09/07 20:11:45 jim Exp $
+//
+//  BOOM, a modified and improved DOOM engine
+//  Copyright (C) 1999 by
+//  id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
+//
+//  This program is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU General Public License
+//  as published by the Free Software Foundation; either version 2
+//  of the License, or (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 
+//  02111-1307, USA.
+//
+// DESCRIPTION:
+//      Preparation of data for rendering,
+//      generation of lookups, caching, retrieval by name.
+//
+//-----------------------------------------------------------------------------
+
 byte *tranmap;
 
 //

src/doom/r_defs.h

@@ -376,6 +376,7 @@ typedef struct vissprite_s
     lighttable_t*	colormap;
 
     int			mobjflags;
+    // [crispy] color translation table for blood colored by monster class
     byte*			translation;
 
 } vissprite_t;