OrdinaryMagician/vkdoom_m
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Directory restructuring to make it easier to version projects that don't build zdoom.exe.

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SVN r4 (trunk)
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Randy Heit 2006-02-24 04:48:15 +00:00
commit cf11cbdb30
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// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id:$
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This source is available for distribution and/or modification
// only under the terms of the DOOM Source Code License as
// published by id Software. All rights reserved.
//
// The source is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
// for more details.
//
// $Log:$
//
// DESCRIPTION:
// Sky rendering. The DOOM sky is a texture map like any
// wall, wrapping around. 1024 columns equal 360 degrees.
// The default sky map is 256 columns and repeats 4 times
// on a 320 screen.
//
//
//-----------------------------------------------------------------------------
// Needed for FRACUNIT.
#include "m_fixed.h"
#include "r_data.h"
#include "c_cvars.h"
#include "g_level.h"
#include "r_sky.h"
#include "r_main.h"
#include "v_text.h"
#include "gi.h"
extern int *texturewidthmask;
//
// sky mapping
//
int skyflatnum;
int sky1texture, sky2texture;
fixed_t skytexturemid;
fixed_t skyscale;
int skystretch;
fixed_t skyheight;
fixed_t skyiscale;
int sky1shift, sky2shift;
fixed_t sky1pos=0, sky1speed=0;
fixed_t sky2pos=0, sky2speed=0;
// [RH] Stretch sky texture if not taller than 128 pixels?
CUSTOM_CVAR (Bool, r_stretchsky, true, CVAR_ARCHIVE)
{
R_InitSkyMap ();
}
extern "C" int detailxshift, detailyshift;
extern fixed_t freelookviewheight;
//==========================================================================
//
// R_InitSkyMap
//
// Called whenever the view size changes.
//
//==========================================================================
void R_InitSkyMap ()
{
fixed_t fskyheight;
FTexture *skytex1, *skytex2;
skytex1 = TexMan[sky1texture];
skytex2 = TexMan[sky2texture];
if (skytex1 == NULL)
return;
if (skytex1->GetHeight() != skytex2->GetHeight())
{
Printf (TEXTCOLOR_BOLD "Both sky textures must be the same height." TEXTCOLOR_NORMAL "\n");
sky2texture = sky1texture;
}
fskyheight = skytex1->GetHeight() << FRACBITS;
if (DivScale3 (fskyheight, skytex1->ScaleY ? skytex1->ScaleY : 8) <= (128 << FRACBITS))
{
skytexturemid = r_Yaspect/2*FRACUNIT;
skystretch = (r_stretchsky
&& !(dmflags & DF_NO_FREELOOK)
&& !(level.flags & LEVEL_FORCENOSKYSTRETCH)) ? 1 : 0;
}
else
{
skytexturemid = MulScale3 (199<<FRACBITS, skytex1->ScaleY ? skytex1->ScaleY : 8);
skystretch = 0;
}
skyheight = fskyheight << skystretch;
if (viewwidth && viewheight)
{
skyiscale = (r_Yaspect*FRACUNIT) / (((freelookviewheight<<detailxshift) * viewwidth) / (viewwidth<<detailxshift));
skyscale = ((((freelookviewheight<<detailxshift) * viewwidth) / (viewwidth<<detailxshift)) << FRACBITS) /
(r_Yaspect);
skyiscale = Scale (skyiscale, FieldOfView, 2048);
skyscale = Scale (skyscale, 2048, FieldOfView);
}
// The (standard Doom) sky map is 256*128*4 maps.
sky1shift = 22+skystretch-16;
sky2shift = 22+skystretch-16;
if (skytex1->WidthBits >= 9)
sky1shift -= skystretch;
if (skytex2->WidthBits >= 9)
sky2shift -= skystretch;
}