gzdoom-gles/src/swrenderer/things/r_wallsprite.cpp

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//
// 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.
//
#include <stdio.h>
#include <stdlib.h>
#include <algorithm>
#include "p_lnspec.h"
#include "templates.h"
#include "doomdef.h"
#include "m_swap.h"
#include "i_system.h"
#include "w_wad.h"
#include "swrenderer/r_main.h"
#include "swrenderer/scene/r_things.h"
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#include "swrenderer/things/r_wallsprite.h"
#include "c_console.h"
#include "c_cvars.h"
#include "c_dispatch.h"
#include "doomstat.h"
#include "v_video.h"
#include "sc_man.h"
#include "s_sound.h"
#include "sbar.h"
#include "gi.h"
#include "r_sky.h"
#include "cmdlib.h"
#include "g_level.h"
#include "d_net.h"
#include "colormatcher.h"
#include "d_netinf.h"
#include "p_effect.h"
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#include "swrenderer/scene/r_bsp.h"
#include "swrenderer/scene/r_3dfloors.h"
#include "swrenderer/drawers/r_draw_rgba.h"
#include "swrenderer/drawers/r_draw_pal.h"
#include "v_palette.h"
#include "r_data/r_translate.h"
#include "r_data/colormaps.h"
#include "r_data/voxels.h"
#include "p_local.h"
#include "p_maputl.h"
#include "r_voxel.h"
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#include "swrenderer/segments/r_drawsegment.h"
#include "swrenderer/scene/r_portal.h"
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#include "swrenderer/line/r_wallsetup.h"
#include "swrenderer/line/r_walldraw.h"
#include "swrenderer/r_memory.h"
namespace swrenderer
{
void R_ProjectWallSprite(AActor *thing, const DVector3 &pos, FTextureID picnum, const DVector2 &scale, int renderflags)
{
FWallCoords wallc;
double x1, x2;
DVector2 left, right;
double gzb, gzt, tz;
FTexture *pic = TexMan(picnum, true);
DAngle ang = thing->Angles.Yaw + 90;
double angcos = ang.Cos();
double angsin = ang.Sin();
vissprite_t *vis;
// Determine left and right edges of sprite. The sprite's angle is its normal,
// so the edges are 90 degrees each side of it.
x2 = pic->GetScaledWidth();
x1 = pic->GetScaledLeftOffset();
x1 *= scale.X;
x2 *= scale.X;
left.X = pos.X - x1 * angcos - ViewPos.X;
left.Y = pos.Y - x1 * angsin - ViewPos.Y;
right.X = left.X + x2 * angcos;
right.Y = right.Y + x2 * angsin;
// Is it off-screen?
if (wallc.Init(left, right, TOO_CLOSE_Z))
return;
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RenderPortal *renderportal = RenderPortal::Instance();
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if (wallc.sx1 >= renderportal->WindowRight || wallc.sx2 <= renderportal->WindowLeft)
return;
// Sprite sorting should probably treat these as walls, not sprites,
// but right now, I just want to get them drawing.
tz = (pos.X - ViewPos.X) * ViewTanCos + (pos.Y - ViewPos.Y) * ViewTanSin;
int scaled_to = pic->GetScaledTopOffset();
int scaled_bo = scaled_to - pic->GetScaledHeight();
gzt = pos.Z + scale.Y * scaled_to;
gzb = pos.Z + scale.Y * scaled_bo;
vis = R_NewVisSprite();
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vis->CurrentPortalUniq = renderportal->CurrentPortalUniq;
vis->x1 = wallc.sx1 < renderportal->WindowLeft ? renderportal->WindowLeft : wallc.sx1;
vis->x2 = wallc.sx2 >= renderportal->WindowRight ? renderportal->WindowRight : wallc.sx2;
vis->yscale = (float)scale.Y;
vis->idepth = float(1 / tz);
vis->depth = (float)tz;
vis->sector = thing->Sector;
vis->heightsec = NULL;
vis->gpos = { (float)pos.X, (float)pos.Y, (float)pos.Z };
vis->gzb = (float)gzb;
vis->gzt = (float)gzt;
vis->deltax = float(pos.X - ViewPos.X);
vis->deltay = float(pos.Y - ViewPos.Y);
vis->renderflags = renderflags;
if (thing->flags5 & MF5_BRIGHT) vis->renderflags |= RF_FULLBRIGHT; // kg3D
vis->Style.RenderStyle = thing->RenderStyle;
vis->FillColor = thing->fillcolor;
vis->Translation = thing->Translation;
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vis->FakeFlatStat = WaterFakeSide::Center;
vis->Style.Alpha = float(thing->Alpha);
vis->fakefloor = NULL;
vis->fakeceiling = NULL;
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vis->bInMirror = renderportal->MirrorFlags & RF_XFLIP;
vis->pic = pic;
vis->bIsVoxel = false;
vis->bWallSprite = true;
vis->Style.ColormapNum = GETPALOOKUP(
r_SpriteVisibility / MAX(tz, MINZ), spriteshade);
vis->Style.BaseColormap = basecolormap;
vis->wallc = wallc;
}
void R_DrawWallSprite(vissprite_t *spr)
{
int x1, x2;
double iyscale;
x1 = MAX<int>(spr->x1, spr->wallc.sx1);
x2 = MIN<int>(spr->x2, spr->wallc.sx2);
if (x1 >= x2)
return;
FWallTmapVals WallT;
WallT.InitFromWallCoords(&spr->wallc);
PrepWall(swall, lwall, spr->pic->GetWidth() << FRACBITS, x1, x2, WallT);
iyscale = 1 / spr->yscale;
dc_texturemid = (spr->gzt - ViewPos.Z) * iyscale;
if (spr->renderflags & RF_XFLIP)
{
int right = (spr->pic->GetWidth() << FRACBITS) - 1;
for (int i = x1; i < x2; i++)
{
lwall[i] = right - lwall[i];
}
}
// Prepare lighting
bool calclighting = false;
FDynamicColormap *usecolormap = basecolormap;
bool rereadcolormap = true;
// Decals that are added to the scene must fade to black.
if (spr->Style.RenderStyle == LegacyRenderStyles[STYLE_Add] && usecolormap->Fade != 0)
{
usecolormap = GetSpecialLights(usecolormap->Color, 0, usecolormap->Desaturate);
rereadcolormap = false;
}
int shade = LIGHT2SHADE(spr->sector->lightlevel + r_actualextralight);
GlobVis = r_WallVisibility;
float lightleft = float(GlobVis / spr->wallc.sz1);
float lightstep = float((GlobVis / spr->wallc.sz2 - lightleft) / (spr->wallc.sx2 - spr->wallc.sx1));
float light = lightleft + (x1 - spr->wallc.sx1) * lightstep;
if (fixedlightlev >= 0)
R_SetColorMapLight(usecolormap, 0, FIXEDLIGHT2SHADE(fixedlightlev));
else if (fixedcolormap != NULL)
R_SetColorMapLight(fixedcolormap, 0, 0);
else if (!foggy && (spr->renderflags & RF_FULLBRIGHT))
R_SetColorMapLight((r_fullbrightignoresectorcolor) ? &FullNormalLight : usecolormap, 0, 0);
else
calclighting = true;
// Draw it
WallSpriteTile = spr->pic;
if (spr->renderflags & RF_YFLIP)
{
sprflipvert = true;
iyscale = -iyscale;
dc_texturemid -= spr->pic->GetHeight();
}
else
{
sprflipvert = false;
}
float maskedScaleY = (float)iyscale;
int x = x1;
bool visible = R_SetPatchStyle(spr->Style.RenderStyle, spr->Style.Alpha, spr->Translation, spr->FillColor);
// R_SetPatchStyle can modify basecolormap.
if (rereadcolormap)
{
usecolormap = basecolormap;
}
if (!visible)
{
return;
}
else
{
while (x < x2)
{
if (calclighting)
{ // calculate lighting
R_SetColorMapLight(usecolormap, light, shade);
}
if (!R_ClipSpriteColumnWithPortals(spr))
R_WallSpriteColumn(x, maskedScaleY);
light += lightstep;
x++;
}
}
R_FinishSetPatchStyle();
}
void R_WallSpriteColumn(int x, float maskedScaleY)
{
using namespace drawerargs;
dc_x = x;
float iscale = swall[dc_x] * maskedScaleY;
dc_iscale = FLOAT2FIXED(iscale);
spryscale = 1 / iscale;
if (sprflipvert)
sprtopscreen = CenterY + dc_texturemid * spryscale;
else
sprtopscreen = CenterY - dc_texturemid * spryscale;
dc_texturefrac = 0;
R_DrawMaskedColumn(WallSpriteTile, lwall[dc_x]);
}
}