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qzdoom/src/r_poly_plane.cpp
2016-11-25 07:44:51 +01:00

370 lines
12 KiB
C++

/*
** Handling drawing a plane (ceiling, floor)
** Copyright (c) 2016 Magnus Norddahl
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
*/
#include <stdlib.h>
#include "templates.h"
#include "doomdef.h"
#include "sbar.h"
#include "r_data/r_translate.h"
#include "r_poly_plane.h"
#include "r_poly_portal.h"
#include "r_poly.h"
#include "r_sky.h" // for skyflatnum
EXTERN_CVAR(Int, r_3dfloors)
void RenderPolyPlane::RenderPlanes(const TriMatrix &worldToClip, subsector_t *sub, uint32_t subsectorDepth, uint32_t stencilValue, double skyCeilingHeight, double skyFloorHeight, std::vector<std::unique_ptr<PolyDrawSectorPortal>> &sectorPortals)
{
RenderPolyPlane plane;
if (r_3dfloors)
{
auto frontsector = sub->sector;
auto &ffloors = frontsector->e->XFloor.ffloors;
// 3D floor floors
for (int i = 0; i < (int)ffloors.Size(); i++)
{
F3DFloor *fakeFloor = ffloors[i];
if (!(fakeFloor->flags & FF_EXISTS)) continue;
if (!fakeFloor->model) continue;
if (fakeFloor->bottom.plane->isSlope()) continue;
//if (!(fakeFloor->flags & FF_NOSHADE) || (fakeFloor->flags & (FF_RENDERPLANES | FF_RENDERSIDES)))
// R_3D_AddHeight(fakeFloor->top.plane, frontsector);
if (!(fakeFloor->flags & FF_RENDERPLANES)) continue;
if (fakeFloor->alpha == 0) continue;
if (fakeFloor->flags & FF_THISINSIDE && fakeFloor->flags & FF_INVERTSECTOR) continue;
//fakeFloor->alpha
double fakeHeight = fakeFloor->top.plane->ZatPoint(frontsector->centerspot);
if (fakeHeight < ViewPos.Z && fakeHeight > frontsector->floorplane.ZatPoint(frontsector->centerspot))
{
plane.Render3DFloor(worldToClip, sub, subsectorDepth, stencilValue, false, fakeFloor);
}
}
// 3D floor ceilings
for (int i = 0; i < (int)ffloors.Size(); i++)
{
F3DFloor *fakeFloor = ffloors[i];
if (!(fakeFloor->flags & FF_EXISTS)) continue;
if (!fakeFloor->model) continue;
if (fakeFloor->top.plane->isSlope()) continue;
//if (!(fakeFloor->flags & FF_NOSHADE) || (fakeFloor->flags & (FF_RENDERPLANES | FF_RENDERSIDES)))
// R_3D_AddHeight(fakeFloor->bottom.plane, frontsector);
if (!(fakeFloor->flags & FF_RENDERPLANES)) continue;
if (fakeFloor->alpha == 0) continue;
if (!(fakeFloor->flags & FF_THISINSIDE) && (fakeFloor->flags & (FF_SWIMMABLE | FF_INVERTSECTOR)) == (FF_SWIMMABLE | FF_INVERTSECTOR)) continue;
//fakeFloor->alpha
double fakeHeight = fakeFloor->bottom.plane->ZatPoint(frontsector->centerspot);
if (fakeHeight > ViewPos.Z && fakeHeight < frontsector->ceilingplane.ZatPoint(frontsector->centerspot))
{
plane.Render3DFloor(worldToClip, sub, subsectorDepth, stencilValue, true, fakeFloor);
}
}
}
plane.Render(worldToClip, sub, subsectorDepth, stencilValue, true, skyCeilingHeight, sectorPortals);
plane.Render(worldToClip, sub, subsectorDepth, stencilValue, false, skyFloorHeight, sectorPortals);
}
void RenderPolyPlane::Render3DFloor(const TriMatrix &worldToClip, subsector_t *sub, uint32_t subsectorDepth, uint32_t stencilValue, bool ceiling, F3DFloor *fakeFloor)
{
FTextureID picnum = ceiling ? *fakeFloor->bottom.texture : *fakeFloor->top.texture;
FTexture *tex = TexMan(picnum);
if (tex->UseType == FTexture::TEX_Null)
return;
int lightlevel = 255;
if (fixedlightlev < 0 && sub->sector->e->XFloor.lightlist.Size())
{
lightlist_t *light = P_GetPlaneLight(sub->sector, &sub->sector->ceilingplane, false);
basecolormap = light->extra_colormap;
lightlevel = *light->p_lightlevel;
}
TriUniforms uniforms;
uniforms.light = (uint32_t)(lightlevel / 255.0f * 256.0f);
if (fixedlightlev >= 0 || fixedcolormap)
uniforms.light = 256;
uniforms.flags = 0;
uniforms.subsectorDepth = subsectorDepth;
TriVertex *vertices = PolyVertexBuffer::GetVertices(sub->numlines);
if (!vertices)
return;
if (ceiling)
{
for (uint32_t i = 0; i < sub->numlines; i++)
{
seg_t *line = &sub->firstline[i];
vertices[sub->numlines - 1 - i] = PlaneVertex(line->v1, fakeFloor->bottom.plane->ZatPoint(line->v1));
}
}
else
{
for (uint32_t i = 0; i < sub->numlines; i++)
{
seg_t *line = &sub->firstline[i];
vertices[i] = PlaneVertex(line->v1, fakeFloor->top.plane->ZatPoint(line->v1));
}
}
PolyDrawArgs args;
args.uniforms = uniforms;
args.objectToClip = &worldToClip;
args.vinput = vertices;
args.vcount = sub->numlines;
args.mode = TriangleDrawMode::Fan;
args.ccw = true;
args.stenciltestvalue = stencilValue;
args.stencilwritevalue = stencilValue + 1;
args.SetTexture(tex);
args.SetColormap(sub->sector->ColorMap);
PolyTriangleDrawer::draw(args, TriDrawVariant::DrawNormal, TriBlendMode::Copy);
PolyTriangleDrawer::draw(args, TriDrawVariant::Stencil, TriBlendMode::Copy);
}
void RenderPolyPlane::Render(const TriMatrix &worldToClip, subsector_t *sub, uint32_t subsectorDepth, uint32_t stencilValue, bool ceiling, double skyHeight, std::vector<std::unique_ptr<PolyDrawSectorPortal>> &sectorPortals)
{
FSectorPortal *portal = sub->sector->ValidatePortal(ceiling ? sector_t::ceiling : sector_t::floor);
PolyDrawSectorPortal *polyportal = nullptr;
if (portal)
{
for (auto &p : sectorPortals)
{
if (p->Portal == portal) // To do: what other criterias do we need to check for?
{
polyportal = p.get();
break;
}
}
if (!polyportal)
{
sectorPortals.push_back(std::make_unique<PolyDrawSectorPortal>(portal, ceiling));
polyportal = sectorPortals.back().get();
}
}
sector_t *fakesector = sub->sector->heightsec;
if (fakesector && (fakesector == sub->sector || (fakesector->MoreFlags & SECF_IGNOREHEIGHTSEC) == SECF_IGNOREHEIGHTSEC))
fakesector = nullptr;
bool fakeflooronly = fakesector && (fakesector->MoreFlags & SECF_FAKEFLOORONLY) != SECF_FAKEFLOORONLY;
FTextureID picnum;
bool ccw;
sector_t *frontsector;
if (ceiling && fakesector && ViewPos.Z < fakesector->floorplane.Zat0())
{
picnum = fakesector->GetTexture(sector_t::ceiling);
ccw = false;
ceiling = false;
frontsector = fakesector;
}
else if (!ceiling && fakesector && ViewPos.Z >= fakesector->floorplane.Zat0())
{
picnum = fakesector->GetTexture(sector_t::ceiling);
ccw = true;
frontsector = fakesector;
}
else if (ceiling && fakesector && ViewPos.Z > fakesector->ceilingplane.Zat0() && !fakeflooronly)
{
picnum = fakesector->GetTexture(sector_t::floor);
ccw = true;
frontsector = fakesector;
}
else if (!ceiling && fakesector && ViewPos.Z <= fakesector->ceilingplane.Zat0() && !fakeflooronly)
{
picnum = fakesector->GetTexture(sector_t::floor);
ccw = false;
ceiling = true;
frontsector = fakesector;
}
else
{
picnum = sub->sector->GetTexture(ceiling ? sector_t::ceiling : sector_t::floor);
ccw = true;
frontsector = sub->sector;
}
FTexture *tex = TexMan(picnum);
if (tex->UseType == FTexture::TEX_Null)
return;
bool isSky = picnum == skyflatnum;
TriUniforms uniforms;
uniforms.light = (uint32_t)(frontsector->lightlevel / 255.0f * 256.0f);
if (fixedlightlev >= 0 || fixedcolormap)
uniforms.light = 256;
uniforms.flags = 0;
uniforms.subsectorDepth = isSky ? RenderPolyPortal::SkySubsectorDepth : subsectorDepth;
TriVertex *vertices = PolyVertexBuffer::GetVertices(sub->numlines);
if (!vertices)
return;
if (ceiling)
{
for (uint32_t i = 0; i < sub->numlines; i++)
{
seg_t *line = &sub->firstline[i];
vertices[sub->numlines - 1 - i] = PlaneVertex(line->v1, isSky ? skyHeight : frontsector->ceilingplane.ZatPoint(line->v1));
}
}
else
{
for (uint32_t i = 0; i < sub->numlines; i++)
{
seg_t *line = &sub->firstline[i];
vertices[i] = PlaneVertex(line->v1, isSky ? skyHeight : frontsector->floorplane.ZatPoint(line->v1));
}
}
PolyDrawArgs args;
args.uniforms = uniforms;
args.objectToClip = &worldToClip;
args.vinput = vertices;
args.vcount = sub->numlines;
args.mode = TriangleDrawMode::Fan;
args.ccw = ccw;
args.stenciltestvalue = stencilValue;
args.stencilwritevalue = stencilValue + 1;
args.SetColormap(frontsector->ColorMap);
if (!isSky)
{
if (!portal)
{
args.SetTexture(tex);
PolyTriangleDrawer::draw(args, TriDrawVariant::DrawNormal, TriBlendMode::Copy);
PolyTriangleDrawer::draw(args, TriDrawVariant::Stencil, TriBlendMode::Copy);
}
else
{
args.stencilwritevalue = 252;
PolyTriangleDrawer::draw(args, TriDrawVariant::Stencil, TriBlendMode::Copy);
polyportal->Shape.push_back({ args.vinput, args.vcount, args.ccw, subsectorDepth });
}
}
else
{
if (portal)
{
args.stencilwritevalue = 252;
polyportal->Shape.push_back({ args.vinput, args.vcount, args.ccw, subsectorDepth });
}
else
{
args.stencilwritevalue = 255;
}
PolyTriangleDrawer::draw(args, TriDrawVariant::Stencil, TriBlendMode::Copy);
for (uint32_t i = 0; i < sub->numlines; i++)
{
TriVertex *wallvert = PolyVertexBuffer::GetVertices(4);
if (!wallvert)
return;
seg_t *line = &sub->firstline[i];
double skyBottomz1 = frontsector->ceilingplane.ZatPoint(line->v1);
double skyBottomz2 = frontsector->ceilingplane.ZatPoint(line->v2);
if (line->backsector)
{
sector_t *backsector = (line->backsector != line->frontsector) ? line->backsector : line->frontsector;
double frontceilz1 = frontsector->ceilingplane.ZatPoint(line->v1);
double frontfloorz1 = frontsector->floorplane.ZatPoint(line->v1);
double frontceilz2 = frontsector->ceilingplane.ZatPoint(line->v2);
double frontfloorz2 = frontsector->floorplane.ZatPoint(line->v2);
double backceilz1 = backsector->ceilingplane.ZatPoint(line->v1);
double backfloorz1 = backsector->floorplane.ZatPoint(line->v1);
double backceilz2 = backsector->ceilingplane.ZatPoint(line->v2);
double backfloorz2 = backsector->floorplane.ZatPoint(line->v2);
double topceilz1 = frontceilz1;
double topceilz2 = frontceilz2;
double topfloorz1 = MIN(backceilz1, frontceilz1);
double topfloorz2 = MIN(backceilz2, frontceilz2);
double bottomceilz1 = MAX(frontfloorz1, backfloorz1);
double bottomceilz2 = MAX(frontfloorz2, backfloorz2);
double middleceilz1 = topfloorz1;
double middleceilz2 = topfloorz2;
double middlefloorz1 = MIN(bottomceilz1, middleceilz1);
double middlefloorz2 = MIN(bottomceilz2, middleceilz2);
bool bothSkyCeiling = frontsector->GetTexture(sector_t::ceiling) == skyflatnum && backsector->GetTexture(sector_t::ceiling) == skyflatnum;
bool closedSector = backceilz1 == backfloorz1 && backceilz2 == backfloorz2;
if (ceiling && bothSkyCeiling && closedSector)
{
skyBottomz1 = middlefloorz1;
skyBottomz2 = middlefloorz2;
}
else if (bothSkyCeiling)
{
continue;
}
}
if (ceiling)
{
wallvert[0] = PlaneVertex(line->v1, skyHeight);
wallvert[1] = PlaneVertex(line->v2, skyHeight);
wallvert[2] = PlaneVertex(line->v2, skyBottomz2);
wallvert[3] = PlaneVertex(line->v1, skyBottomz1);
}
else
{
wallvert[0] = PlaneVertex(line->v1, frontsector->floorplane.ZatPoint(line->v1));
wallvert[1] = PlaneVertex(line->v2, frontsector->floorplane.ZatPoint(line->v2));
wallvert[2] = PlaneVertex(line->v2, skyHeight);
wallvert[3] = PlaneVertex(line->v1, skyHeight);
}
args.vinput = wallvert;
args.vcount = 4;
PolyTriangleDrawer::draw(args, TriDrawVariant::Stencil, TriBlendMode::Copy);
if (portal)
polyportal->Shape.push_back({ args.vinput, args.vcount, args.ccw, subsectorDepth });
}
}
}
TriVertex RenderPolyPlane::PlaneVertex(vertex_t *v1, double height)
{
TriVertex v;
v.x = (float)v1->fPos().X;
v.y = (float)v1->fPos().Y;
v.z = (float)height;
v.w = 1.0f;
v.varying[0] = v.x / 64.0f;
v.varying[1] = 1.0f - v.y / 64.0f;
return v;
}