r_sky.c

//
// Copyright (C) 1993-1996 Id Software, Inc.
// Copyright (C) 2016-2017 Alexey Khokholov (Nuke.YKT)
//
// 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.
//
// 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?
//  
//


// Needed for FRACUNIT.
#include "doomdef.h"

// Needed for Flat retrieval.
#include "r_data.h"
#include "r_sky.h"

//
// sky mapping
//
int			skyflatnum;
int			skytexture;
int			skytexturemid;



//
// R_InitSkyMap
// Called whenever the view size changes.
//
void R_InitSkyMap (void)
{
    skyflatnum = R_FlatNumForName ( SKYFLATNAME );
    skytexturemid = 100*FRACUNIT;
}