mirror of
https://github.com/ZDoom/qzdoom.git
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298 lines
9.2 KiB
C++
298 lines
9.2 KiB
C++
//
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//---------------------------------------------------------------------------
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//
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// Copyright(C) 2005-2016 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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** hw_flatvertices.cpp
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** Creates flat vertex data for hardware rendering.
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**
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**/
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#include "doomtype.h"
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#include "p_local.h"
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#include "r_state.h"
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#include "m_argv.h"
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#include "c_cvars.h"
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#include "g_levellocals.h"
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#include "flatvertices.h"
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FFlatVertexGenerator::FFlatVertexGenerator(int width, int height)
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{
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vbo_shadowdata.Resize(NUM_RESERVED);
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// the first quad is reserved for handling coordinates through uniforms.
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vbo_shadowdata[0].Set(0, 0, 0, 0, 0);
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vbo_shadowdata[1].Set(1, 0, 0, 0, 0);
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vbo_shadowdata[2].Set(2, 0, 0, 0, 0);
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vbo_shadowdata[3].Set(3, 0, 0, 0, 0);
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// and the second one for the fullscreen quad used for blend overlays.
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vbo_shadowdata[4].Set(0, 0, 0, 0, 0);
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vbo_shadowdata[5].Set(0, (float)height, 0, 0, 1);
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vbo_shadowdata[6].Set((float)width, 0, 0, 1, 0);
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vbo_shadowdata[7].Set((float)width, (float)height, 0, 1, 1);
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// and this is for the postprocessing copy operation
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vbo_shadowdata[8].Set(-1.0f, -1.0f, 0, 0.0f, 0.0f);
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vbo_shadowdata[9].Set(-1.0f, 1.0f, 0, 0.0f, 1.f);
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vbo_shadowdata[10].Set(1.0f, -1.0f, 0, 1.f, 0.0f);
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vbo_shadowdata[11].Set(1.0f, 1.0f, 0, 1.f, 1.f);
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// The next two are the stencil caps.
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vbo_shadowdata[12].Set(-32767.0f, 32767.0f, -32767.0f, 0, 0);
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vbo_shadowdata[13].Set(-32767.0f, 32767.0f, 32767.0f, 0, 0);
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vbo_shadowdata[14].Set(32767.0f, 32767.0f, 32767.0f, 0, 0);
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vbo_shadowdata[15].Set(32767.0f, 32767.0f, -32767.0f, 0, 0);
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vbo_shadowdata[16].Set(-32767.0f, -32767.0f, -32767.0f, 0, 0);
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vbo_shadowdata[17].Set(-32767.0f, -32767.0f, 32767.0f, 0, 0);
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vbo_shadowdata[18].Set(32767.0f, -32767.0f, 32767.0f, 0, 0);
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vbo_shadowdata[19].Set(32767.0f, -32767.0f, -32767.0f, 0, 0);
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}
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void FFlatVertexGenerator::OutputResized(int width, int height)
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{
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vbo_shadowdata[4].Set(0, 0, 0, 0, 0);
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vbo_shadowdata[5].Set(0, (float)height, 0, 0, 1);
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vbo_shadowdata[6].Set((float)width, 0, 0, 1, 0);
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vbo_shadowdata[7].Set((float)width, (float)height, 0, 1, 1);
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}
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//==========================================================================
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//
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// Initialize a single vertex
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//
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//==========================================================================
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void FFlatVertex::SetFlatVertex(vertex_t *vt, const secplane_t & plane)
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{
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x = (float)vt->fX();
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y = (float)vt->fY();
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z = (float)plane.ZatPoint(vt);
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u = (float)vt->fX()/64.f;
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v = -(float)vt->fY()/64.f;
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}
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//==========================================================================
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//
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// Find a 3D floor
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//
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//==========================================================================
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static F3DFloor *Find3DFloor(sector_t *target, sector_t *model)
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{
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for(unsigned i=0; i<target->e->XFloor.ffloors.Size(); i++)
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{
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F3DFloor *ffloor = target->e->XFloor.ffloors[i];
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if (ffloor->model == model && !(ffloor->flags & FF_THISINSIDE)) return ffloor;
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}
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return NULL;
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}
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//==========================================================================
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//
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// Creates the vertices for one plane in one subsector
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//
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//==========================================================================
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int FFlatVertexGenerator::CreateSubsectorVertices(subsector_t *sub, const secplane_t &plane, int floor)
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{
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int idx = vbo_shadowdata.Reserve(sub->numlines);
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for(unsigned int k=0; k<sub->numlines; k++, idx++)
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{
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vbo_shadowdata[idx].SetFlatVertex(sub->firstline[k].v1, plane);
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if (sub->sector->transdoor && floor) vbo_shadowdata[idx].z -= 1.f;
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}
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return idx;
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}
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//==========================================================================
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//
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// Creates the vertices for one plane in one subsector
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//
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//==========================================================================
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int FFlatVertexGenerator::CreateSectorVertices(sector_t *sec, const secplane_t &plane, int floor)
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{
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int rt = vbo_shadowdata.Size();
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// First calculate the vertices for the sector itself
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for(int j=0; j<sec->subsectorcount; j++)
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{
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subsector_t *sub = sec->subsectors[j];
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CreateSubsectorVertices(sub, plane, floor);
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}
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return rt;
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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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int FFlatVertexGenerator::CreateVertices(int h, sector_t *sec, const secplane_t &plane, int floor)
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{
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// First calculate the vertices for the sector itself
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sec->vboheight[h] = sec->GetPlaneTexZ(h);
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sec->vboindex[h] = CreateSectorVertices(sec, plane, floor);
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// Next are all sectors using this one as heightsec
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TArray<sector_t *> &fakes = sec->e->FakeFloor.Sectors;
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for (unsigned g=0; g<fakes.Size(); g++)
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{
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sector_t *fsec = fakes[g];
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fsec->vboindex[2+h] = CreateSectorVertices(fsec, plane, false);
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}
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// and finally all attached 3D floors
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TArray<sector_t *> &xf = sec->e->XFloor.attached;
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for (unsigned g=0; g<xf.Size(); g++)
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{
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sector_t *fsec = xf[g];
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F3DFloor *ffloor = Find3DFloor(fsec, sec);
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if (ffloor != NULL && ffloor->flags & FF_RENDERPLANES)
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{
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bool dotop = (ffloor->top.model == sec) && (ffloor->top.isceiling == h);
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bool dobottom = (ffloor->bottom.model == sec) && (ffloor->bottom.isceiling == h);
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if (dotop || dobottom)
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{
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if (dotop) ffloor->top.vindex = vbo_shadowdata.Size();
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if (dobottom) ffloor->bottom.vindex = vbo_shadowdata.Size();
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CreateSectorVertices(fsec, plane, false);
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}
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}
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}
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sec->vbocount[h] = vbo_shadowdata.Size() - sec->vboindex[h];
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return sec->vboindex[h];
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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 FFlatVertexGenerator::CreateFlatVertices()
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{
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for (int h = sector_t::floor; h <= sector_t::ceiling; h++)
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{
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for(auto &sec : level.sectors)
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{
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CreateVertices(h, &sec, sec.GetSecPlane(h), h == sector_t::floor);
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}
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}
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// We need to do a final check for Vavoom water and FF_FIX sectors.
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// No new vertices are needed here. The planes come from the actual sector
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for (auto &sec : level.sectors)
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{
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for(auto ff : sec.e->XFloor.ffloors)
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{
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if (ff->top.model == &sec)
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{
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ff->top.vindex = sec.vboindex[ff->top.isceiling];
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}
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if (ff->bottom.model == &sec)
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{
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ff->bottom.vindex = sec.vboindex[ff->top.isceiling];
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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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//
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//
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//==========================================================================
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void FFlatVertexGenerator::UpdatePlaneVertices(sector_t *sec, int plane, FFlatVertex *map)
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{
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int startvt = sec->vboindex[plane];
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int countvt = sec->vbocount[plane];
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secplane_t &splane = sec->GetSecPlane(plane);
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FFlatVertex *vt = &vbo_shadowdata[startvt];
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FFlatVertex *mapvt = &map[startvt];
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for(int i=0; i<countvt; i++, vt++, mapvt++)
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{
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vt->z = (float)splane.ZatPoint(vt->x, vt->y);
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if (plane == sector_t::floor && sec->transdoor) vt->z -= 1;
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mapvt->z = vt->z;
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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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//==========================================================================
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void FFlatVertexGenerator::CreateVertices()
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{
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vbo_shadowdata.Resize(NUM_RESERVED);
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CreateFlatVertices();
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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 FFlatVertexGenerator::CheckPlanes(sector_t *sector, FFlatVertex *map)
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{
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if (sector->GetPlaneTexZ(sector_t::ceiling) != sector->vboheight[sector_t::ceiling])
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{
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UpdatePlaneVertices(sector, sector_t::ceiling, map);
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sector->vboheight[sector_t::ceiling] = sector->GetPlaneTexZ(sector_t::ceiling);
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}
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if (sector->GetPlaneTexZ(sector_t::floor) != sector->vboheight[sector_t::floor])
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{
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UpdatePlaneVertices(sector, sector_t::floor, map);
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sector->vboheight[sector_t::floor] = sector->GetPlaneTexZ(sector_t::floor);
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}
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}
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//==========================================================================
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//
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// checks the validity of all planes attached to this sector
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// and updates them if possible.
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//
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//==========================================================================
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void FFlatVertexGenerator::CheckUpdate(sector_t *sector, FFlatVertex *map)
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{
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CheckPlanes(sector, map);
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sector_t *hs = sector->GetHeightSec();
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if (hs != NULL) CheckPlanes(hs, map);
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for (unsigned i = 0; i < sector->e->XFloor.ffloors.Size(); i++)
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CheckPlanes(sector->e->XFloor.ffloors[i]->model, map);
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}
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