dca4a42dd6
There are several places where a temporary change of light mode is needed, all these made this change in the global level struct. Now the change is only local to the active draw info.
288 lines
8 KiB
C++
288 lines
8 KiB
C++
//
|
|
//---------------------------------------------------------------------------
|
|
//
|
|
// Copyright(C) 2002-2018 Christoph Oelckers
|
|
// All rights reserved.
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 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 Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with this program. If not, see http://www.gnu.org/licenses/
|
|
//
|
|
//--------------------------------------------------------------------------
|
|
//
|
|
/*
|
|
** gl_light.cpp
|
|
** Light level / fog management / dynamic lights
|
|
**
|
|
**/
|
|
|
|
#include "c_cvars.h"
|
|
#include "r_sky.h"
|
|
#include "g_levellocals.h"
|
|
#include "hw_lighting.h"
|
|
#include "hwrenderer/scene/hw_drawinfo.h"
|
|
|
|
// externally settable lighting properties
|
|
static float distfogtable[2][256]; // light to fog conversion table for black fog
|
|
|
|
CVAR(Int, gl_weaponlight, 8, CVAR_ARCHIVE);
|
|
CVAR(Bool, gl_enhanced_nightvision, true, CVAR_ARCHIVE|CVAR_NOINITCALL)
|
|
|
|
//==========================================================================
|
|
//
|
|
// Sets up the fog tables
|
|
//
|
|
//==========================================================================
|
|
|
|
CUSTOM_CVAR(Int, gl_distfog, 70, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
|
|
{
|
|
for (int i = 0; i < 256; i++)
|
|
{
|
|
|
|
if (i < 164)
|
|
{
|
|
distfogtable[0][i] = (float)((gl_distfog >> 1) + (gl_distfog)*(164 - i) / 164);
|
|
}
|
|
else if (i < 230)
|
|
{
|
|
distfogtable[0][i] = (float)((gl_distfog >> 1) - (gl_distfog >> 1)*(i - 164) / (230 - 164));
|
|
}
|
|
else distfogtable[0][i] = 0;
|
|
|
|
if (i < 128)
|
|
{
|
|
distfogtable[1][i] = 6.f + (float)((gl_distfog >> 1) + (gl_distfog)*(128 - i) / 48);
|
|
}
|
|
else if (i < 216)
|
|
{
|
|
distfogtable[1][i] = (216.f - i) / ((216.f - 128.f)) * gl_distfog / 10;
|
|
}
|
|
else distfogtable[1][i] = 0;
|
|
}
|
|
}
|
|
|
|
CUSTOM_CVAR(Int,gl_fogmode,1,CVAR_ARCHIVE|CVAR_NOINITCALL)
|
|
{
|
|
if (self>2) self=2;
|
|
if (self<0) self=0;
|
|
}
|
|
|
|
|
|
//==========================================================================
|
|
//
|
|
// Get current light level
|
|
//
|
|
//==========================================================================
|
|
|
|
int HWDrawInfo::CalcLightLevel(int lightlevel, int rellight, bool weapon, int blendfactor)
|
|
{
|
|
int light;
|
|
|
|
if (lightlevel == 0) return 0;
|
|
|
|
bool darklightmode = (isDarkLightMode()) || (isSoftwareLighting() && blendfactor > 0);
|
|
|
|
if (darklightmode && lightlevel < 192 && !weapon)
|
|
{
|
|
if (lightlevel > 100)
|
|
{
|
|
light = xs_CRoundToInt(192.f - (192 - lightlevel)* 1.87f);
|
|
if (light + rellight < 20)
|
|
{
|
|
light = 20 + (light + rellight - 20) / 5;
|
|
}
|
|
else
|
|
{
|
|
light += rellight;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
light = (lightlevel + rellight) / 5;
|
|
}
|
|
|
|
}
|
|
else
|
|
{
|
|
light=lightlevel+rellight;
|
|
}
|
|
|
|
return clamp(light, 0, 255);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Get current light color
|
|
//
|
|
//==========================================================================
|
|
|
|
PalEntry HWDrawInfo::CalcLightColor(int light, PalEntry pe, int blendfactor)
|
|
{
|
|
int r,g,b;
|
|
|
|
if (blendfactor == 0)
|
|
{
|
|
if (isSoftwareLighting())
|
|
{
|
|
return pe;
|
|
}
|
|
|
|
r = pe.r * light / 255;
|
|
g = pe.g * light / 255;
|
|
b = pe.b * light / 255;
|
|
}
|
|
else
|
|
{
|
|
// This is what Legacy does with colored light in 3D volumes. No, it doesn't really make sense...
|
|
// It also doesn't translate well to software style lighting.
|
|
int mixlight = light * (255 - blendfactor);
|
|
|
|
r = (mixlight + pe.r * blendfactor) / 255;
|
|
g = (mixlight + pe.g * blendfactor) / 255;
|
|
b = (mixlight + pe.b * blendfactor) / 255;
|
|
}
|
|
return PalEntry(255, uint8_t(r), uint8_t(g), uint8_t(b));
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// calculates the current fog density
|
|
//
|
|
// Rules for fog:
|
|
//
|
|
// 1. If bit 4 of gl_lightmode is set always use the level's fog density.
|
|
// This is what Legacy's GL render does.
|
|
// 2. black fog means no fog and always uses the distfogtable based on the level's fog density setting
|
|
// 3. If outside fog is defined and the current fog color is the same as the outside fog
|
|
// the engine always uses the outside fog density to make the fog uniform across the level.
|
|
// If the outside fog's density is undefined it uses the level's fog density and if that is
|
|
// not defined it uses a default of 70.
|
|
// 4. If a global fog density is specified it is being used for all fog on the level
|
|
// 5. If none of the above apply fog density is based on the light level as for the software renderer.
|
|
//
|
|
//==========================================================================
|
|
|
|
float HWDrawInfo::GetFogDensity(int lightlevel, PalEntry fogcolor, int sectorfogdensity, int blendfactor)
|
|
{
|
|
float density;
|
|
|
|
auto oldlightmode = lightmode;
|
|
if (isSoftwareLighting() && blendfactor > 0) lightmode = ELightMode::Doom; // The blendfactor feature does not work with software-style lighting.
|
|
|
|
if (lightmode == ELightMode::DoomLegacy)
|
|
{
|
|
// uses approximations of Legacy's default settings.
|
|
density = level.fogdensity ? (float)level.fogdensity : 18;
|
|
}
|
|
else if (sectorfogdensity != 0)
|
|
{
|
|
// case 1: Sector has an explicit fog density set.
|
|
density = (float)sectorfogdensity;
|
|
}
|
|
else if ((fogcolor.d & 0xffffff) == 0)
|
|
{
|
|
// case 2: black fog
|
|
if ((!isSoftwareLighting() || blendfactor > 0) && !(level.flags3 & LEVEL3_NOLIGHTFADE))
|
|
{
|
|
density = distfogtable[lightmode != ELightMode::LinearStandard][hw_ClampLight(lightlevel)];
|
|
}
|
|
else
|
|
{
|
|
density = 0;
|
|
}
|
|
}
|
|
else if (level.outsidefogdensity != 0 && APART(level.info->outsidefog) != 0xff && (fogcolor.d & 0xffffff) == (level.info->outsidefog & 0xffffff))
|
|
{
|
|
// case 3. outsidefogdensity has already been set as needed
|
|
density = (float)level.outsidefogdensity;
|
|
}
|
|
else if (level.fogdensity != 0)
|
|
{
|
|
// case 4: level has fog density set
|
|
density = (float)level.fogdensity;
|
|
}
|
|
else if (lightlevel < 248)
|
|
{
|
|
// case 5: use light level
|
|
density = (float)clamp<int>(255 - lightlevel, 30, 255);
|
|
}
|
|
else
|
|
{
|
|
density = 0.f;
|
|
}
|
|
return density;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Check if the current linedef is a candidate for a fog boundary
|
|
//
|
|
// Requirements for a fog boundary:
|
|
// - front sector has no fog
|
|
// - back sector has fog
|
|
// - at least one of both does not have a sky ceiling.
|
|
//
|
|
//==========================================================================
|
|
|
|
bool HWDrawInfo::CheckFog(sector_t *frontsector, sector_t *backsector)
|
|
{
|
|
if (frontsector == backsector) return false; // there can't be a boundary if both sides are in the same sector.
|
|
|
|
// Check for fog boundaries. This needs a few more checks for the sectors
|
|
|
|
PalEntry fogcolor = frontsector->Colormap.FadeColor;
|
|
|
|
if ((fogcolor.d & 0xffffff) == 0)
|
|
{
|
|
return false;
|
|
}
|
|
else if (fogcolor.a != 0)
|
|
{
|
|
}
|
|
else if (level.outsidefogdensity != 0 && APART(level.info->outsidefog) != 0xff && (fogcolor.d & 0xffffff) == (level.info->outsidefog & 0xffffff))
|
|
{
|
|
}
|
|
else if (level.fogdensity!=0 || lightmode == ELightMode::DoomLegacy)
|
|
{
|
|
// case 3: level has fog density set
|
|
}
|
|
else
|
|
{
|
|
// case 4: use light level
|
|
if (frontsector->lightlevel >= 248) return false;
|
|
}
|
|
|
|
fogcolor = backsector->Colormap.FadeColor;
|
|
|
|
if ((fogcolor.d & 0xffffff) == 0)
|
|
{
|
|
}
|
|
else if (level.outsidefogdensity != 0 && APART(level.info->outsidefog) != 0xff && (fogcolor.d & 0xffffff) == (level.info->outsidefog & 0xffffff))
|
|
{
|
|
return false;
|
|
}
|
|
else if (level.fogdensity!=0 || lightmode == ELightMode::DoomLegacy)
|
|
{
|
|
// case 3: level has fog density set
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
// case 4: use light level
|
|
if (backsector->lightlevel < 248) return false;
|
|
}
|
|
|
|
// in all other cases this might create more problems than it solves.
|
|
return ((frontsector->GetTexture(sector_t::ceiling)!=skyflatnum ||
|
|
backsector->GetTexture(sector_t::ceiling)!=skyflatnum));
|
|
}
|
|
|