76d3ae5ba2
With no 3D floors this appears to be ok, but there are so many places where colormaps are being set in the software renderer that I cannot guarantee that I got all of them correct. This will need some testing.
483 lines
16 KiB
C++
483 lines
16 KiB
C++
/*
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** Handling drawing a wall
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** Copyright (c) 2016 Magnus Norddahl
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**
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** This software is provided 'as-is', without any express or implied
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** warranty. In no event will the authors be held liable for any damages
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** arising from the use of this software.
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**
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** Permission is granted to anyone to use this software for any purpose,
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** including commercial applications, and to alter it and redistribute it
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** freely, subject to the following restrictions:
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**
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** 1. The origin of this software must not be misrepresented; you must not
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** claim that you wrote the original software. If you use this software
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** in a product, an acknowledgment in the product documentation would be
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** appreciated but is not required.
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** 2. Altered source versions must be plainly marked as such, and must not be
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** misrepresented as being the original software.
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** 3. This notice may not be removed or altered from any source distribution.
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**
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*/
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#include <stdlib.h>
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#include "templates.h"
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#include "doomdef.h"
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#include "doomstat.h"
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#include "doomdata.h"
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#include "p_lnspec.h"
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#include "sbar.h"
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#include "r_data/r_translate.h"
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#include "poly_wall.h"
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#include "poly_decal.h"
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#include "polyrenderer/poly_renderer.h"
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#include "r_sky.h"
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#include "swrenderer/scene/r_light.h"
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#include "g_levellocals.h"
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EXTERN_CVAR(Bool, r_drawmirrors)
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bool RenderPolyWall::RenderLine(const TriMatrix &worldToClip, const Vec4f &clipPlane, PolyCull &cull, seg_t *line, sector_t *frontsector, uint32_t subsectorDepth, uint32_t stencilValue, std::vector<PolyTranslucentObject> &translucentWallsOutput, std::vector<std::unique_ptr<PolyDrawLinePortal>> &linePortals)
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{
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PolyDrawLinePortal *polyportal = nullptr;
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if (line->backsector == nullptr && line->linedef && line->sidedef == line->linedef->sidedef[0] && (line->linedef->special == Line_Mirror && r_drawmirrors))
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{
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if (PolyRenderer::Instance()->InsertSeenMirror(line->linedef))
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{
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linePortals.push_back(std::make_unique<PolyDrawLinePortal>(line->linedef));
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polyportal = linePortals.back().get();
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}
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}
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else if (line->linedef && line->linedef->isVisualPortal())
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{
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FLinePortal *portal = line->linedef->getPortal();
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if (PolyRenderer::Instance()->InsertSeenLinePortal(portal))
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{
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for (auto &p : linePortals)
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{
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if (p->Portal == portal) // To do: what other criterias do we need to check for?
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{
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polyportal = p.get();
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break;
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}
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}
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if (!polyportal)
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{
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linePortals.push_back(std::make_unique<PolyDrawLinePortal>(portal));
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polyportal = linePortals.back().get();
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}
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}
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}
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RenderPolyWall wall;
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wall.LineSeg = line;
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wall.Line = line->linedef;
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wall.Side = line->sidedef;
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wall.Colormap = GetColorTable(frontsector->Colormap, frontsector->SpecialColors[sector_t::walltop]);
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wall.Masked = false;
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wall.SubsectorDepth = subsectorDepth;
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wall.StencilValue = stencilValue;
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double frontceilz1 = frontsector->ceilingplane.ZatPoint(line->v1);
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double frontfloorz1 = frontsector->floorplane.ZatPoint(line->v1);
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double frontceilz2 = frontsector->ceilingplane.ZatPoint(line->v2);
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double frontfloorz2 = frontsector->floorplane.ZatPoint(line->v2);
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if (line->backsector == nullptr)
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{
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if (line->sidedef)
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{
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wall.SetCoords(line->v1->fPos(), line->v2->fPos(), frontceilz1, frontfloorz1, frontceilz2, frontfloorz2);
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wall.TopZ = frontceilz1;
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wall.BottomZ = frontfloorz1;
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wall.UnpeggedCeil = frontceilz1;
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wall.Texpart = side_t::mid;
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wall.Polyportal = polyportal;
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wall.Render(worldToClip, clipPlane, cull);
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return true;
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}
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}
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else
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{
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sector_t *backsector = (line->backsector != line->frontsector) ? line->backsector : line->frontsector;
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double backceilz1 = backsector->ceilingplane.ZatPoint(line->v1);
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double backfloorz1 = backsector->floorplane.ZatPoint(line->v1);
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double backceilz2 = backsector->ceilingplane.ZatPoint(line->v2);
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double backfloorz2 = backsector->floorplane.ZatPoint(line->v2);
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double topceilz1 = frontceilz1;
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double topceilz2 = frontceilz2;
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double topfloorz1 = MIN(backceilz1, frontceilz1);
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double topfloorz2 = MIN(backceilz2, frontceilz2);
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double bottomceilz1 = MAX(frontfloorz1, backfloorz1);
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double bottomceilz2 = MAX(frontfloorz2, backfloorz2);
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double bottomfloorz1 = frontfloorz1;
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double bottomfloorz2 = frontfloorz2;
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double middleceilz1 = topfloorz1;
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double middleceilz2 = topfloorz2;
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double middlefloorz1 = MIN(bottomceilz1, middleceilz1);
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double middlefloorz2 = MIN(bottomceilz2, middleceilz2);
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bool bothSkyCeiling = frontsector->GetTexture(sector_t::ceiling) == skyflatnum && backsector->GetTexture(sector_t::ceiling) == skyflatnum;
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if ((topceilz1 > topfloorz1 || topceilz2 > topfloorz2) && line->sidedef && !bothSkyCeiling)
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{
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wall.SetCoords(line->v1->fPos(), line->v2->fPos(), topceilz1, topfloorz1, topceilz2, topfloorz2);
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wall.TopZ = topceilz1;
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wall.BottomZ = topfloorz1;
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wall.UnpeggedCeil = topceilz1;
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wall.Texpart = side_t::top;
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wall.Render(worldToClip, clipPlane, cull);
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}
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if ((bottomfloorz1 < bottomceilz1 || bottomfloorz2 < bottomceilz2) && line->sidedef)
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{
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wall.SetCoords(line->v1->fPos(), line->v2->fPos(), bottomceilz1, bottomfloorz1, bottomceilz2, bottomfloorz2);
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wall.TopZ = bottomceilz1;
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wall.BottomZ = bottomfloorz2;
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wall.UnpeggedCeil = topceilz1;
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wall.Texpart = side_t::bottom;
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wall.Render(worldToClip, clipPlane, cull);
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}
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if (line->sidedef)
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{
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wall.SetCoords(line->v1->fPos(), line->v2->fPos(), middleceilz1, middlefloorz1, middleceilz2, middlefloorz2);
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wall.TopZ = middleceilz1;
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wall.BottomZ = middlefloorz1;
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wall.UnpeggedCeil = topceilz1;
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wall.Texpart = side_t::mid;
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wall.Masked = true;
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FTexture *midtex = TexMan(line->sidedef->GetTexture(side_t::mid), true);
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if (midtex && midtex->UseType != FTexture::TEX_Null)
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translucentWallsOutput.push_back({ wall });
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if (polyportal)
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{
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wall.Polyportal = polyportal;
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wall.Render(worldToClip, clipPlane, cull);
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}
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}
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}
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return polyportal != nullptr;
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}
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void RenderPolyWall::Render3DFloorLine(const TriMatrix &worldToClip, const Vec4f &clipPlane, PolyCull &cull, seg_t *line, sector_t *frontsector, uint32_t subsectorDepth, uint32_t stencilValue, F3DFloor *fakeFloor, std::vector<PolyTranslucentObject> &translucentWallsOutput)
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{
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double frontceilz1 = fakeFloor->top.plane->ZatPoint(line->v1);
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double frontfloorz1 = fakeFloor->bottom.plane->ZatPoint(line->v1);
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double frontceilz2 = fakeFloor->top.plane->ZatPoint(line->v2);
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double frontfloorz2 = fakeFloor->bottom.plane->ZatPoint(line->v2);
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RenderPolyWall wall;
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wall.LineSeg = line;
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wall.Line = fakeFloor->master;
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wall.Side = fakeFloor->master->sidedef[0];
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wall.Colormap = GetColorTable(frontsector->Colormap, frontsector->SpecialColors[sector_t::walltop]);
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wall.Masked = false;
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wall.SubsectorDepth = subsectorDepth;
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wall.StencilValue = stencilValue;
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wall.SetCoords(line->v1->fPos(), line->v2->fPos(), frontceilz1, frontfloorz1, frontceilz2, frontfloorz2);
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wall.TopZ = frontceilz1;
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wall.BottomZ = frontfloorz1;
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wall.UnpeggedCeil = frontceilz1;
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wall.Texpart = side_t::mid;
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wall.Render(worldToClip, clipPlane, cull);
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}
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void RenderPolyWall::SetCoords(const DVector2 &v1, const DVector2 &v2, double ceil1, double floor1, double ceil2, double floor2)
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{
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this->v1 = v1;
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this->v2 = v2;
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this->ceil1 = ceil1;
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this->floor1 = floor1;
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this->ceil2 = ceil2;
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this->floor2 = floor2;
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}
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void RenderPolyWall::Render(const TriMatrix &worldToClip, const Vec4f &clipPlane, PolyCull &cull)
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{
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bool foggy = false;
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FTexture *tex = GetTexture();
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if (!tex && !Polyportal)
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return;
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TriVertex *vertices = PolyVertexBuffer::GetVertices(4);
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if (!vertices)
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return;
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vertices[0].x = (float)v1.X;
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vertices[0].y = (float)v1.Y;
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vertices[0].z = (float)ceil1;
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vertices[0].w = 1.0f;
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vertices[1].x = (float)v2.X;
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vertices[1].y = (float)v2.Y;
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vertices[1].z = (float)ceil2;
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vertices[1].w = 1.0f;
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vertices[2].x = (float)v2.X;
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vertices[2].y = (float)v2.Y;
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vertices[2].z = (float)floor2;
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vertices[2].w = 1.0f;
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vertices[3].x = (float)v1.X;
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vertices[3].y = (float)v1.Y;
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vertices[3].z = (float)floor1;
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vertices[3].w = 1.0f;
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if (tex)
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{
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PolyWallTextureCoords texcoords(tex, LineSeg, Line, Side, Texpart, TopZ, BottomZ, UnpeggedCeil);
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vertices[0].varying[0] = (float)texcoords.u1;
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vertices[0].varying[1] = (float)texcoords.v1;
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vertices[1].varying[0] = (float)texcoords.u2;
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vertices[1].varying[1] = (float)texcoords.v1;
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vertices[2].varying[0] = (float)texcoords.u2;
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vertices[2].varying[1] = (float)texcoords.v2;
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vertices[3].varying[0] = (float)texcoords.u1;
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vertices[3].varying[1] = (float)texcoords.v2;
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}
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// Masked walls clamp to the 0-1 range (no texture repeat)
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if (Masked)
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{
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ClampHeight(vertices[0], vertices[3]);
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ClampHeight(vertices[1], vertices[2]);
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}
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PolyDrawArgs args;
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args.uniforms.globvis = (float)PolyRenderer::Instance()->Thread.Light->WallGlobVis(foggy);
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args.uniforms.light = (uint32_t)(GetLightLevel() / 255.0f * 256.0f);
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args.uniforms.flags = 0;
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args.uniforms.subsectorDepth = SubsectorDepth;
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args.objectToClip = &worldToClip;
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args.vinput = vertices;
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args.vcount = 4;
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args.mode = TriangleDrawMode::Fan;
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args.ccw = true;
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args.stenciltestvalue = StencilValue;
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args.stencilwritevalue = StencilValue + 1;
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if (tex)
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args.SetTexture(tex);
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args.SetColormap(GetColorTable(Line->frontsector->Colormap, Line->frontsector->SpecialColors[sector_t::walltop]));
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args.SetClipPlane(clipPlane.x, clipPlane.y, clipPlane.z, clipPlane.w);
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//if (Side && Side->lighthead)
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// args.uniforms.light = 255; // Make walls touched by a light fullbright!
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if (Polyportal)
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{
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args.stencilwritevalue = Polyportal->StencilValue;
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args.writeColor = false;
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args.writeSubsector = false;
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PolyTriangleDrawer::draw(args);
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Polyportal->Shape.push_back({ args.vinput, args.vcount, args.ccw, args.uniforms.subsectorDepth });
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int sx1, sx2;
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LineSegmentRange range = cull.GetSegmentRangeForLine(v1.X, v1.Y, v2.X, v2.Y, sx1, sx2);
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if (range == LineSegmentRange::HasSegment)
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Polyportal->Segments.push_back({ sx1, sx2 });
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}
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else if (!Masked)
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{
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args.blendmode = TriBlendMode::Copy;
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PolyTriangleDrawer::draw(args);
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}
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else
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{
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args.uniforms.destalpha = (Line->flags & ML_ADDTRANS) ? 256 : (uint32_t)(256 - Line->alpha * 256);
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args.uniforms.srcalpha = (uint32_t)(Line->alpha * 256);
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args.subsectorTest = true;
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args.writeSubsector = false;
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args.writeStencil = false;
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if (args.uniforms.destalpha == 0 && args.uniforms.srcalpha == 256)
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args.blendmode = TriBlendMode::AlphaBlend;
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else
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args.blendmode = TriBlendMode::Add;
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PolyTriangleDrawer::draw(args);
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}
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RenderPolyDecal::RenderWallDecals(worldToClip, clipPlane, LineSeg, SubsectorDepth, StencilValue);
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}
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void RenderPolyWall::ClampHeight(TriVertex &v1, TriVertex &v2)
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{
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float top = v1.z;
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float bottom = v2.z;
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float texv1 = v1.varying[1];
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float texv2 = v2.varying[1];
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float delta = (texv2 - texv1);
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float t1 = texv1 < 0.0f ? -texv1 / delta : 0.0f;
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float t2 = texv2 > 1.0f ? (1.0f - texv1) / delta : 1.0f;
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float inv_t1 = 1.0f - t1;
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float inv_t2 = 1.0f - t2;
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v1.z = top * inv_t1 + bottom * t1;
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v1.varying[1] = texv1 * inv_t1 + texv2 * t1;
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v2.z = top * inv_t2 + bottom * t2;
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v2.varying[1] = texv1 * inv_t2 + texv2 * t2;
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}
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FTexture *RenderPolyWall::GetTexture()
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{
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FTexture *tex = TexMan(Side->GetTexture(Texpart), true);
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if (tex == nullptr || tex->UseType == FTexture::TEX_Null)
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{
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// Mapping error. Doom floodfills this with a plane.
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// This code doesn't do that, but at least it uses the "right" texture..
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if (Line && Line->backsector && Line->sidedef[0] == Side)
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{
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if (Texpart == side_t::top)
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tex = TexMan(Line->backsector->GetTexture(sector_t::ceiling), true);
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else if (Texpart == side_t::bottom)
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tex = TexMan(Line->backsector->GetTexture(sector_t::floor), true);
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}
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if (Line && Line->backsector && Line->sidedef[1] == Side)
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{
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if (Texpart == side_t::top)
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tex = TexMan(Line->frontsector->GetTexture(sector_t::ceiling), true);
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else if (Texpart == side_t::bottom)
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tex = TexMan(Line->frontsector->GetTexture(sector_t::floor), true);
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}
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if (tex == nullptr || tex->UseType == FTexture::TEX_Null)
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return nullptr;
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}
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return tex;
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}
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int RenderPolyWall::GetLightLevel()
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{
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swrenderer::CameraLight *cameraLight = swrenderer::CameraLight::Instance();
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if (cameraLight->FixedLightLevel() >= 0 || cameraLight->FixedColormap())
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{
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return 255;
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}
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else
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{
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bool foggy = false;
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int actualextralight = foggy ? 0 : PolyRenderer::Instance()->Thread.Viewport->viewpoint.extralight << 4;
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return clamp(Side->GetLightLevel(foggy, LineSeg->frontsector->lightlevel) + actualextralight, 0, 255);
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}
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}
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/////////////////////////////////////////////////////////////////////////////
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PolyWallTextureCoords::PolyWallTextureCoords(FTexture *tex, const seg_t *lineseg, const line_t *line, const side_t *side, side_t::ETexpart texpart, double topz, double bottomz, double unpeggedceil)
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{
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CalcU(tex, lineseg, line, side, texpart);
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CalcV(tex, line, side, texpart, topz, bottomz, unpeggedceil);
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}
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void PolyWallTextureCoords::CalcU(FTexture *tex, const seg_t *lineseg, const line_t *line, const side_t *side, side_t::ETexpart texpart)
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{
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double lineLength = side->TexelLength;
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double lineStart = 0.0;
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bool entireSegment = ((lineseg->v1 == line->v1) && (lineseg->v2 == line->v2)) || ((lineseg->v2 == line->v1) && (lineseg->v1 == line->v2));
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if (!entireSegment)
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{
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lineLength = (lineseg->v2->fPos() - lineseg->v1->fPos()).Length();
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lineStart = (lineseg->v1->fPos() - line->v1->fPos()).Length();
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}
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int texWidth = tex->GetWidth();
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double uscale = side->GetTextureXScale(texpart) * tex->Scale.X;
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u1 = lineStart + side->GetTextureXOffset(texpart);
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u2 = u1 + lineLength;
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u1 *= uscale;
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u2 *= uscale;
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u1 /= texWidth;
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u2 /= texWidth;
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}
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void PolyWallTextureCoords::CalcV(FTexture *tex, const line_t *line, const side_t *side, side_t::ETexpart texpart, double topz, double bottomz, double unpeggedceil)
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{
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double vscale = side->GetTextureYScale(texpart) * tex->Scale.Y;
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double yoffset = side->GetTextureYOffset(texpart);
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if (tex->bWorldPanning)
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yoffset *= vscale;
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switch (texpart)
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{
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default:
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case side_t::mid:
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CalcVMidPart(tex, line, side, topz, bottomz, vscale, yoffset);
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break;
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case side_t::top:
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CalcVTopPart(tex, line, side, topz, bottomz, vscale, yoffset);
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break;
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case side_t::bottom:
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CalcVBottomPart(tex, line, side, topz, bottomz, unpeggedceil, vscale, yoffset);
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break;
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}
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int texHeight = tex->GetHeight();
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v1 /= texHeight;
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v2 /= texHeight;
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}
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void PolyWallTextureCoords::CalcVTopPart(FTexture *tex, const line_t *line, const side_t *side, double topz, double bottomz, double vscale, double yoffset)
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{
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bool pegged = (line->flags & ML_DONTPEGTOP) == 0;
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if (pegged) // bottom to top
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{
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int texHeight = tex->GetHeight();
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v1 = -yoffset;
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v2 = v1 + (topz - bottomz);
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v1 *= vscale;
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v2 *= vscale;
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v1 = texHeight - v1;
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v2 = texHeight - v2;
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std::swap(v1, v2);
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}
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else // top to bottom
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{
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v1 = yoffset;
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v2 = v1 + (topz - bottomz);
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v1 *= vscale;
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v2 *= vscale;
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}
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}
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void PolyWallTextureCoords::CalcVMidPart(FTexture *tex, const line_t *line, const side_t *side, double topz, double bottomz, double vscale, double yoffset)
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{
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bool pegged = (line->flags & ML_DONTPEGBOTTOM) == 0;
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if (pegged) // top to bottom
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{
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v1 = yoffset * vscale;
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v2 = (yoffset + (topz - bottomz)) * vscale;
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}
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else // bottom to top
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{
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int texHeight = tex->GetHeight();
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v1 = texHeight - (-yoffset + (topz - bottomz)) * vscale;
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v2 = texHeight + yoffset * vscale;
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}
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}
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void PolyWallTextureCoords::CalcVBottomPart(FTexture *tex, const line_t *line, const side_t *side, double topz, double bottomz, double unpeggedceil, double vscale, double yoffset)
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{
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bool pegged = (line->flags & ML_DONTPEGBOTTOM) == 0;
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if (pegged) // top to bottom
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{
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v1 = yoffset;
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v2 = v1 + (topz - bottomz);
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v1 *= vscale;
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v2 *= vscale;
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}
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else
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{
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v1 = yoffset + (unpeggedceil - topz);
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v2 = v1 + (topz - bottomz);
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v1 *= vscale;
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v2 *= vscale;
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}
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}
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