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https://github.com/DrBeef/Raze.git
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399 lines
10 KiB
C++
399 lines
10 KiB
C++
//
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//---------------------------------------------------------------------------
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//
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// Copyright(C) 2000-2016 Christoph Oelckers
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// All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program 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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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see http://www.gnu.org/licenses/
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//
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//--------------------------------------------------------------------------
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//
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/*
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** gl_flat.cpp
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** Flat processing
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**
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*/
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#include "matrix.h"
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#include "hw_dynlightdata.h"
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#include "hw_cvars.h"
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#include "hw_clock.h"
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#include "hw_material.h"
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#include "hw_drawinfo.h"
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#include "flatvertices.h"
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#include "hw_lightbuffer.h"
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#include "hw_drawstructs.h"
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#include "hw_renderstate.h"
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#include "texturemanager.h"
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#include "earcut.hpp"
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#ifdef _DEBUG
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CVAR(Int, gl_breaksec, -1, 0)
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#endif
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extern PalEntry GlobalMapFog;
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extern float GlobalFogDensity;
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//==========================================================================
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//
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//
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//
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//==========================================================================
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#if 0
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void HWFlat::SetupLights(HWDrawInfo *di, FLightNode * node, FDynLightData &lightdata, int portalgroup)
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{
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Plane p;
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lightdata.Clear();
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if (renderstyle == STYLE_Add && !di->Level->lightadditivesurfaces)
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{
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dynlightindex = -1;
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return; // no lights on additively blended surfaces.
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}
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while (node)
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{
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FDynamicLight * light = node->lightsource;
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if (!light->IsActive())
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{
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node = node->nextLight;
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continue;
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}
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iter_dlightf++;
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// we must do the side check here because gl_GetLight needs the correct plane orientation
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// which we don't have for Legacy-style 3D-floors
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double planeh = plane.plane.ZatPoint(light->Pos);
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if ((planeh<light->Z() && ceiling) || (planeh>light->Z() && !ceiling))
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{
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node = node->nextLight;
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continue;
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}
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p.Set(plane.plane.Normal(), plane.plane.fD());
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draw_dlightf += GetLight(lightdata, portalgroup, p, light, false);
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node = node->nextLight;
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}
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dynlightindex = screen->mLights->UploadLights(lightdata);
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}
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#endif
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//==========================================================================
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//
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// CalcPlane fixme - this should be stored in the sector, not be recalculated each frame.
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//
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//==========================================================================
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static FVector3 CalcNormal(sectortype* sector, int plane)
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{
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FVector3 pt[3];
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auto wal = &wall[sector->wallptr];
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auto wal2 = &wall[wal->point2];
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pt[0] = { (float)WallStartX(wal), (float)WallStartY(wal), 0 };
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pt[1] = { (float)WallEndX(wal), (float)WallEndY(wal), 0 };
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PlanesAtPoint(sector, wal->x, wal->y, plane ? &pt[0].Z : nullptr, plane? nullptr : &pt[0].Z);
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PlanesAtPoint(sector, wal2->x, wal2->y, plane ? &pt[1].Z : nullptr, plane ? nullptr : &pt[1].Z);
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if (pt[0].X == pt[1].X)
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{
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if (pt[0].Y == pt[1].Y) return { 0.f, 0.f, plane ? -1.f : 1.f };
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pt[2].X = pt[0].X + 4;
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pt[2].Y = pt[0].Y;
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}
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else
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{
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pt[2].X = pt[0].X;
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pt[2].Y = pt[0].Y + 4;
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}
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PlanesAtPoint(sector, pt[2].X * 16, pt[2].Y * 16, plane ? &pt[2].Z : nullptr, plane ? nullptr : &pt[2].Z);
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auto normal = (pt[2] - pt[0]) ^ (pt[1] - pt[0]);
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if ((pt[2].Z < 0 && !plane) || (pt[2].Z > 0 && plane)) return -pt[2];
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return pt[2];
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}
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//==========================================================================
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//
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// this should be buffered later.
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//
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//==========================================================================
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void HWFlat::MakeVertices()
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{
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int numvertices = sec->wallnum;
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TArray<FVector3> points(numvertices, true);
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using Point = std::pair<float, float>;
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std::vector<std::vector<Point>> polygon;
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std::vector<Point>* curPoly;
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polygon.resize(1);
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curPoly = &polygon.back();
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for (int i = 0; i < numvertices; i++)
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{
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auto wal = &wall[sec->wallptr + i];
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float X = WallStartX(wal);
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float Y = WallStartY(wal);
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curPoly->push_back(std::make_pair(X, Y));
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if (wal->point2 != sec->wallptr+i+1 && i < numvertices - 1)
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{
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polygon.resize(polygon.size() + 1);
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curPoly = &polygon.back();
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}
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}
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// Now make sure that the outer boundary is the first polygon by picking a point that's as much to the outside as possible.
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int outer = 0;
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float minx = FLT_MAX;
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float miny = FLT_MAX;
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for (size_t a = 0; a < polygon.size(); a++)
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{
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for (auto& pt : polygon[a])
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{
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if (pt.first < minx || (pt.first == minx && pt.second < miny))
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{
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minx = pt.first;
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miny = pt.second;
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outer = a;
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}
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}
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}
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if (outer != 0) std::swap(polygon[0], polygon[outer]);
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auto indices = mapbox::earcut(polygon);
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int p = 0;
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for (size_t a = 0; a < polygon.size(); a++)
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{
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for (auto& pt : polygon[a])
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{
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float planez;
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PlanesAtPoint(sec, (pt.first * 16), (pt.second * -16), plane ? &planez : nullptr, !plane ? &planez : nullptr);
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FVector3 point = { pt.first, pt.second, planez };
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points[p++] = point;
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}
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}
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auto ret = screen->mVertexData->AllocVertices(indices.size());
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auto vp = ret.first;
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for (auto i : indices)
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{
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auto& pt = points[i];
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vp->SetVertex(pt.X, pt.Z, pt.Y);
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vp->SetTexCoord(pt.X / 64.f, pt.Y / 64.f); // todo: align
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vp++;
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}
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vertindex = ret.second;
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vertcount = indices.size();
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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void HWFlat::DrawFlat(HWDrawInfo *di, FRenderState &state, bool translucent)
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{
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if (screen->BuffersArePersistent())
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{
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MakeVertices();
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}
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#ifdef _DEBUG
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if (sec - sector == gl_breaksec)
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{
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int a = 0;
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}
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#endif
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state.SetNormal(CalcNormal(sector, plane));
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// Fog must be done before the texture so that the texture selector can override it.
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bool foggy = (GlobalMapFog || (fade & 0xffffff));
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auto ShadeDiv = lookups.tables[palette].ShadeFactor;
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// Disable brightmaps if non-black fog is used.
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if (ShadeDiv >= 1 / 1000.f && foggy)
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{
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state.EnableFog(1);
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float density = GlobalMapFog ? GlobalFogDensity : 350.f - Scale(numshades - shade, 150, numshades);
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state.SetFog((GlobalMapFog) ? GlobalMapFog : fade, density);
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state.SetSoftLightLevel(255);
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state.SetLightParms(128.f, 1 / 1000.f);
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}
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else
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{
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state.EnableFog(0);
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state.SetFog(0, 0);
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state.SetSoftLightLevel(ShadeDiv >= 1 / 1000.f ? 255 - Scale(shade, 255, numshades) : 255);
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state.SetLightParms(visibility, ShadeDiv / (numshades - 2));
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}
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// The shade rgb from the tint is ignored here.
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state.SetColor(PalEntry(255, globalr, globalg, globalb));
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if (translucent)
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{
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state.SetRenderStyle(renderstyle);
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if (!texture->GetTranslucency()) state.AlphaFunc(Alpha_GEqual, gl_mask_threshold);
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else state.AlphaFunc(Alpha_GEqual, 0.f);
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}
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state.SetMaterial(texture, UF_Texture, 0, 0/*flags & 3*/, TRANSLATION(Translation_Remap + curbasepal, palette), -1);
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state.SetLightIndex(dynlightindex);
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state.Draw(DT_Triangles, vertindex, vertcount);
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vertexcount += vertcount;
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if (translucent) state.SetRenderStyle(DefaultRenderStyle());
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//state.SetObjectColor(0xffffffff);
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//state.SetAddColor(0);
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//state.ApplyTextureManipulation(nullptr);
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}
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//==========================================================================
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//
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// HWFlat::PutFlat
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//
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// submit to the renderer
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//
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//==========================================================================
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void HWFlat::PutFlat(HWDrawInfo *di, int whichplane)
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{
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if (!screen->BuffersArePersistent()) // should be made static buffer content later (when the logic is working)
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{
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#if 0
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if (di->Level->HasDynamicLights && texture != nullptr && !di->isFullbrightScene() && !(hacktype & (SSRF_PLANEHACK | SSRF_FLOODHACK)))
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{
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SetupLights(di, section->lighthead, lightdata, sector->PortalGroup);
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}
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#endif
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MakeVertices();
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}
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plane = whichplane;
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di->AddFlat(this);
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rendered_flats++;
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}
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//==========================================================================
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//
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// Process a sector's flats for rendering
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// This function is only called once per sector.
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// Subsequent subsectors are just quickly added to the ss_renderflags array
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//
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//==========================================================================
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void HWFlat::ProcessSector(HWDrawInfo *di, sectortype * frontsector, int which)
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{
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#ifdef _DEBUG
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if (frontsector - sector == gl_breaksec)
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{
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int a = 0;
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}
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#endif
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dynlightindex = -1;
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const auto &vp = di->Viewpoint;
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float florz, ceilz;
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PlanesAtPoint(frontsector, vp.Pos.X * 16.f, vp.Pos.Y * -16.f, &ceilz, &florz);
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fade = lookups.getFade(frontsector->floorpal); // fog is per sector.
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visibility = sectorVisibility(frontsector);
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sec = frontsector;
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//
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//
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//
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// do floors
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//
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//
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//
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if ((which & SSRF_RENDERFLOOR) && !(frontsector->floorstat & CSTAT_SECTOR_SKY) && florz <= vp.Pos.Z)
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{
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// process the original floor first.
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shade = frontsector->floorshade;
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palette = frontsector->floorpal;
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//port = frontsector->ValidatePortal(sector_t::floor);
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#if 0
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if ((stack = (port != NULL)))
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{
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alpha = frontsector->GetAlpha(sector_t::floor);
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}
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else
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#endif
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alpha = 1.0f;
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if (alpha != 0.f)
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{
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int tilenum = frontsector->floorpicnum;
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tileUpdatePicnum(&tilenum, tilenum, 0);
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texture = tileGetTexture(tilenum);
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if (texture && texture->isValid())
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{
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//iboindex = frontsector->iboindex[sector_t::floor];
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renderstyle = STYLE_Translucent;
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PutFlat(di, 0);
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}
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}
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}
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//
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//
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//
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// do ceilings
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//
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//
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//
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if ((which & SSRF_RENDERCEILING) && !(frontsector->ceilingstat & CSTAT_SECTOR_SKY) && ceilz >= vp.Pos.Z)
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{
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// process the original ceiling first.
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shade = frontsector->ceilingshade;
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palette = frontsector->ceilingpal;
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/*
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port = frontsector->ValidatePortal(sector_t::ceiling);
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if ((stack = (port != NULL)))
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{
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alpha = frontsector->GetAlpha(sector_t::ceiling);
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}
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else*/
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alpha = 1.0f;
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if (alpha != 0.f)
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{
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//iboindex = frontsector->iboindex[sector_t::ceiling];
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int tilenum = frontsector->ceilingpicnum;
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tileUpdatePicnum(&tilenum, tilenum, 0);
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texture = tileGetTexture(tilenum);
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if (texture && texture->isValid())
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{
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//iboindex = frontsector->iboindex[sector_t::floor];
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renderstyle = STYLE_Translucent;
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PutFlat(di, 1);
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}
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}
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}
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}
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