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// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id: r_sky.c,v 1.8 2001/08/06 23:57:09 stroggonmeth Exp $
//
// Copyright (C) 1993-1996 by id Software, Inc.
// Portions Copyright (C) 1998-2000 by DooM Legacy Team.
//
// 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.
//
//
// $Log: r_sky.c,v $
// Revision 1.8 2001/08/06 23:57:09 stroggonmeth
// Removed portal code, improved 3D floors in hardware mode.
//
// Revision 1.7 2001/04/02 18:54:32 bpereira
// no message
//
// Revision 1.6 2001/03/21 18:24:39 stroggonmeth
// Misc changes and fixes. Code cleanup
//
// Revision 1.5 2001/03/13 22:14:20 stroggonmeth
// Long time no commit. 3D floors, FraggleScript, portals, ect.
//
// Revision 1.4 2001/01/25 22:15:44 bpereira
// added heretic support
//
// Revision 1.3 2000/09/21 16:45:08 bpereira
// no message
//
// Revision 1.2 2000/02/27 00:42:10 hurdler
// fix CR+LF problem
//
// Revision 1.1.1.1 2000/02/22 20:32:32 hurdler
// Initial import into CVS (v1.29 pr3)
//
//
// DESCRIPTION:
// Sky rendering. The DOOM sky is a texture map like any
// wall, wrapping around. A 1024 columns equal 360 degrees.
// The default sky map is 256 columns and repeats 4 times
// on a 320 screen?
//
//
//-----------------------------------------------------------------------------
#include "doomdef.h"
#include "r_sky.h"
#include "r_local.h"
#include "w_wad.h"
#include "z_zone.h"
#include "p_maputl.h" // P_PointOnLineSide
// SoM: I know I should be moving portals out of r_sky.c and as soon
// as I have time and a I will... But for now, they are mostly used
// for sky boxes anyway so they have a mostly appropriate home here.
//
// sky mapping
//
int skyflatnum;
int skytexture;
int skytexturemid;
fixed_t skyscale;
int skymode=0; // old (0), new (1) (quick fix!)
//
// R_InitSkyMap called at startup, once.
//
void R_InitSkyMap (void)
{
// set at P_LoadSectors
//skyflatnum = R_FlatNumForName ( SKYFLATNAME );
}
// Setup sky draw for old or new skies (new skies = freelook 256x240)
//
// Call at loadlevel after skytexture is set
//
// NOTE: skycolfunc should be set at R_ExecuteSetViewSize ()
// I dont bother because we don't use low detail no more
//
void R_SetupSkyDraw (void)
{
texpatch_t* patches;
patch_t wpatch;
int count;
int height;
int i;
// parse the patches composing sky texture for the tallest one
// patches are usually RSKY1,RSKY2... and unique
// note: the TEXTURES lump doesn't have the taller size of Legacy
// skies, but the patches it use will give the right size
count = textures[skytexture]->patchcount;
patches = &textures[skytexture]->patches[0];
for (height=0,i=0;i<count;i++,patches++)
{
W_ReadLumpHeader (patches->patch, &wpatch, sizeof(patch_t));
wpatch.height = SHORT(wpatch.height);
if (wpatch.height>height)
height = wpatch.height;
}
// DIRTY : should set the routine depending on colormode in screen.c
if (height>128)
{
// horizon line on 256x240 freelook textures of Legacy or heretic
skytexturemid = 200<<FRACBITS;
skymode = 1;
}
else
{
// the horizon line in a 256x128 sky texture
skytexturemid = 100<<FRACBITS;
skymode = 0;
}
// get the right drawer, it was set by screen.c, depending on the
// current video mode bytes per pixel (quick fix)
skycolfunc = skydrawerfunc[skymode];
R_SetSkyScale ();
}
// set the correct scale for the sky at setviewsize
void R_SetSkyScale (void)
{
//fix this quick mess
if (skytexturemid>100<<FRACBITS)
{
// normal aspect ratio corrected scale
skyscale = FixedDiv (FRACUNIT, pspriteyscale);
}
else
{
// double the texture vertically, bleeergh!!
skyscale = FixedDiv (FRACUNIT, pspriteyscale)>>1;
}
}
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