e08da03a3d
I got rid of the old tx and ty CVARs because they made the texture scaling much more complicated than it was actually needed (and besides, they were completely useless except for testing purposes anyway.) SVN r522 (trunk)
121 lines
3.2 KiB
C++
121 lines
3.2 KiB
C++
// Emacs style mode select -*- C++ -*-
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//-----------------------------------------------------------------------------
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//
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// $Id:$
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//
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// Copyright (C) 1993-1996 by id Software, Inc.
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//
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// This source is available for distribution and/or modification
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// only under the terms of the DOOM Source Code License as
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// published by id Software. All rights reserved.
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//
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// The source is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
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// for more details.
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//
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// $Log:$
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//
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// DESCRIPTION:
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// Sky rendering. The DOOM sky is a texture map like any
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// wall, wrapping around. 1024 columns equal 360 degrees.
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// The default sky map is 256 columns and repeats 4 times
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// on a 320 screen.
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//
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//
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//-----------------------------------------------------------------------------
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// Needed for FRACUNIT.
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#include "m_fixed.h"
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#include "r_data.h"
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#include "c_cvars.h"
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#include "g_level.h"
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#include "r_sky.h"
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#include "r_main.h"
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#include "v_text.h"
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#include "gi.h"
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//
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// sky mapping
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//
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int skyflatnum;
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int sky1texture, sky2texture;
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fixed_t skytexturemid;
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fixed_t skyscale;
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int skystretch;
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fixed_t skyheight;
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fixed_t skyiscale;
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int sky1shift, sky2shift;
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fixed_t sky1pos=0, sky1speed=0;
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fixed_t sky2pos=0, sky2speed=0;
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// [RH] Stretch sky texture if not taller than 128 pixels?
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CUSTOM_CVAR (Bool, r_stretchsky, true, CVAR_ARCHIVE)
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{
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R_InitSkyMap ();
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}
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extern "C" int detailxshift, detailyshift;
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extern fixed_t freelookviewheight;
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//==========================================================================
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//
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// R_InitSkyMap
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//
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// Called whenever the view size changes.
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//
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//==========================================================================
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void R_InitSkyMap ()
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{
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fixed_t fskyheight;
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FTexture *skytex1, *skytex2;
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skytex1 = TexMan[sky1texture];
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skytex2 = TexMan[sky2texture];
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if (skytex1 == NULL)
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return;
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if ((level.flags & LEVEL_DOUBLESKY) && skytex1->GetHeight() != skytex2->GetHeight())
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{
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Printf (TEXTCOLOR_BOLD "Both sky textures must be the same height." TEXTCOLOR_NORMAL "\n");
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sky2texture = sky1texture;
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}
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fskyheight = skytex1->GetHeight() << FRACBITS;
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if (skytex1->GetScaledHeight() <= 128)
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{
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skytexturemid = r_Yaspect/2*FRACUNIT;
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skystretch = (r_stretchsky
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&& !(dmflags & DF_NO_FREELOOK)
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&& !(level.flags & LEVEL_FORCENOSKYSTRETCH)) ? 1 : 0;
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}
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else
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{
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skytexturemid = 199 * skytex1->yScale;
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skystretch = 0;
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}
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skyheight = fskyheight << skystretch;
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if (viewwidth && viewheight)
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{
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skyiscale = (r_Yaspect*FRACUNIT) / (((freelookviewheight<<detailxshift) * viewwidth) / (viewwidth<<detailxshift));
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skyscale = ((((freelookviewheight<<detailxshift) * viewwidth) / (viewwidth<<detailxshift)) << FRACBITS) /
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(r_Yaspect);
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skyiscale = Scale (skyiscale, FieldOfView, 2048);
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skyscale = Scale (skyscale, 2048, FieldOfView);
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}
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// The (standard Doom) sky map is 256*128*4 maps.
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sky1shift = 22+skystretch-16;
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sky2shift = 22+skystretch-16;
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if (skytex1->WidthBits >= 9)
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sky1shift -= skystretch;
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if (skytex2->WidthBits >= 9)
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sky2shift -= skystretch;
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}
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