mirror of
https://github.com/ZDoom/gzdoom-gles.git
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e89a598b31
This was done mainly to reduce the amount of occurences of the word FTexture but it immediately helped detect two small and mostly harmless bugs that were found due to the stricter type checks.
392 lines
13 KiB
C++
392 lines
13 KiB
C++
//
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//---------------------------------------------------------------------------
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//
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// Copyright(C) 2001-2016 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_fakeflat.cpp
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** Fake flat functions to render stacked sectors
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**
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*/
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#include "p_lnspec.h"
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#include "p_local.h"
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#include "g_levellocals.h"
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#include "a_sharedglobal.h"
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#include "r_sky.h"
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#include "gl/renderer/gl_renderer.h"
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#include "gl/scene/gl_scenedrawer.h"
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#include "gl/data/gl_data.h"
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//==========================================================================
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//
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// Check whether the player can look beyond this line
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//
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//==========================================================================
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CVAR(Bool, gltest_slopeopt, false, 0)
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bool gl_CheckClip(side_t * sidedef, sector_t * frontsector, sector_t * backsector)
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{
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line_t *linedef = sidedef->linedef;
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double bs_floorheight1;
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double bs_floorheight2;
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double bs_ceilingheight1;
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double bs_ceilingheight2;
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double fs_floorheight1;
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double fs_floorheight2;
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double fs_ceilingheight1;
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double fs_ceilingheight2;
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// Mirrors and horizons always block the view
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//if (linedef->special==Line_Mirror || linedef->special==Line_Horizon) return true;
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// Lines with portals must never block.
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// Portals which require the sky flat are excluded here, because for them the special sky semantics apply.
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if (!(frontsector->GetPortal(sector_t::ceiling)->mFlags & PORTSF_SKYFLATONLY) ||
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!(frontsector->GetPortal(sector_t::floor)->mFlags & PORTSF_SKYFLATONLY) ||
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!(backsector->GetPortal(sector_t::ceiling)->mFlags & PORTSF_SKYFLATONLY) ||
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!(backsector->GetPortal(sector_t::floor)->mFlags & PORTSF_SKYFLATONLY))
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{
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return false;
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}
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// on large levels this distinction can save some time
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// That's a lot of avoided multiplications if there's a lot to see!
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if (frontsector->ceilingplane.isSlope())
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{
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fs_ceilingheight1 = frontsector->ceilingplane.ZatPoint(linedef->v1);
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fs_ceilingheight2 = frontsector->ceilingplane.ZatPoint(linedef->v2);
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}
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else
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{
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fs_ceilingheight2 = fs_ceilingheight1 = frontsector->ceilingplane.fD();
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}
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if (frontsector->floorplane.isSlope())
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{
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fs_floorheight1 = frontsector->floorplane.ZatPoint(linedef->v1);
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fs_floorheight2 = frontsector->floorplane.ZatPoint(linedef->v2);
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}
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else
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{
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fs_floorheight2 = fs_floorheight1 = -frontsector->floorplane.fD();
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}
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if (backsector->ceilingplane.isSlope())
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{
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bs_ceilingheight1 = backsector->ceilingplane.ZatPoint(linedef->v1);
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bs_ceilingheight2 = backsector->ceilingplane.ZatPoint(linedef->v2);
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}
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else
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{
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bs_ceilingheight2 = bs_ceilingheight1 = backsector->ceilingplane.fD();
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}
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if (backsector->floorplane.isSlope())
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{
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bs_floorheight1 = backsector->floorplane.ZatPoint(linedef->v1);
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bs_floorheight2 = backsector->floorplane.ZatPoint(linedef->v2);
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}
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else
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{
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bs_floorheight2 = bs_floorheight1 = -backsector->floorplane.fD();
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}
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// now check for closed sectors!
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if (bs_ceilingheight1 <= fs_floorheight1 && bs_ceilingheight2 <= fs_floorheight2)
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{
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FTexture * tex = TexMan(sidedef->GetTexture(side_t::top));
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if (!tex || tex->UseType == ETextureType::Null) return false;
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if (backsector->GetTexture(sector_t::ceiling) == skyflatnum &&
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frontsector->GetTexture(sector_t::ceiling) == skyflatnum) return false;
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return true;
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}
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if (fs_ceilingheight1 <= bs_floorheight1 && fs_ceilingheight2 <= bs_floorheight2)
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{
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FTexture * tex = TexMan(sidedef->GetTexture(side_t::bottom));
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if (!tex || tex->UseType == ETextureType::Null) return false;
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// properly render skies (consider door "open" if both floors are sky):
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if (backsector->GetTexture(sector_t::ceiling) == skyflatnum &&
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frontsector->GetTexture(sector_t::ceiling) == skyflatnum) return false;
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return true;
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}
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if (bs_ceilingheight1 <= bs_floorheight1 && bs_ceilingheight2 <= bs_floorheight2)
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{
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// preserve a kind of transparent door/lift special effect:
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if (bs_ceilingheight1 < fs_ceilingheight1 || bs_ceilingheight2 < fs_ceilingheight2)
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{
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FTexture * tex = TexMan(sidedef->GetTexture(side_t::top));
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if (!tex || tex->UseType == ETextureType::Null) return false;
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}
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if (bs_floorheight1 > fs_floorheight1 || bs_floorheight2 > fs_floorheight2)
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{
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FTexture * tex = TexMan(sidedef->GetTexture(side_t::bottom));
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if (!tex || tex->UseType == ETextureType::Null) return false;
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}
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if (backsector->GetTexture(sector_t::ceiling) == skyflatnum &&
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frontsector->GetTexture(sector_t::ceiling) == skyflatnum) return false;
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if (backsector->GetTexture(sector_t::floor) == skyflatnum && frontsector->GetTexture(sector_t::floor)
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== skyflatnum) return false;
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return true;
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}
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return false;
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}
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//==========================================================================
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//
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// check for levels with exposed lower areas
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//
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//==========================================================================
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void GLSceneDrawer::CheckViewArea(vertex_t *v1, vertex_t *v2, sector_t *frontsector, sector_t *backsector)
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{
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if (in_area == area_default &&
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(backsector->heightsec && !(backsector->heightsec->MoreFlags & SECF_IGNOREHEIGHTSEC)) &&
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(!frontsector->heightsec || frontsector->heightsec->MoreFlags & SECF_IGNOREHEIGHTSEC))
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{
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sector_t * s = backsector->heightsec;
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double cz1 = frontsector->ceilingplane.ZatPoint(v1);
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double cz2 = frontsector->ceilingplane.ZatPoint(v2);
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double fz1 = s->floorplane.ZatPoint(v1);
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double fz2 = s->floorplane.ZatPoint(v2);
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// allow some tolerance in case slopes are involved
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if (cz1 <= fz1 + 1. / 100 && cz2 <= fz2 + 1. / 100)
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in_area = area_below;
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else
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in_area = area_normal;
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}
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}
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//==========================================================================
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//
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// This is mostly like R_FakeFlat but with a few alterations necessitated
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// by hardware rendering
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//
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//==========================================================================
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sector_t * gl_FakeFlat(sector_t * sec, sector_t * dest, area_t in_area, bool back)
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{
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if (!sec->heightsec || sec->heightsec->MoreFlags & SECF_IGNOREHEIGHTSEC || sec->heightsec==sec)
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{
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// check for backsectors with the ceiling lower than the floor. These will create
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// visual glitches because upper amd lower textures overlap.
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if (back && sec->planes[sector_t::floor].TexZ > sec->planes[sector_t::ceiling].TexZ)
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{
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if (!sec->floorplane.isSlope() && !sec->ceilingplane.isSlope())
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{
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*dest = *sec;
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dest->ceilingplane=sec->floorplane;
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dest->ceilingplane.FlipVert();
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dest->planes[sector_t::ceiling].TexZ = dest->planes[sector_t::floor].TexZ;
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dest->ClearPortal(sector_t::ceiling);
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dest->ClearPortal(sector_t::floor);
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return dest;
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}
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}
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return sec;
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}
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#ifdef _DEBUG
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if (sec->sectornum==560)
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{
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int a = 0;
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}
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#endif
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if (in_area==area_above)
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{
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if (sec->heightsec->MoreFlags&SECF_FAKEFLOORONLY /*|| sec->GetTexture(sector_t::ceiling)==skyflatnum*/) in_area=area_normal;
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}
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int diffTex = (sec->heightsec->MoreFlags & SECF_CLIPFAKEPLANES);
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sector_t * s = sec->heightsec;
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#if 0
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*dest=*sec; // This will invoke the copy operator which isn't really needed here. Memcpy is faster.
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#else
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memcpy(dest, sec, sizeof(sector_t));
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#endif
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// Replace floor and ceiling height with control sector's heights.
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if (diffTex)
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{
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if (s->floorplane.CopyPlaneIfValid (&dest->floorplane, &sec->ceilingplane))
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{
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dest->SetTexture(sector_t::floor, s->GetTexture(sector_t::floor), false);
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dest->SetPlaneTexZ(sector_t::floor, s->GetPlaneTexZ(sector_t::floor));
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dest->vboindex[sector_t::floor] = sec->vboindex[sector_t::vbo_fakefloor];
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dest->vboheight[sector_t::floor] = s->vboheight[sector_t::floor];
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}
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else if (s->MoreFlags & SECF_FAKEFLOORONLY)
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{
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if (in_area==area_below)
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{
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dest->CopyColors(s);
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if (!(s->MoreFlags & SECF_NOFAKELIGHT))
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{
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dest->lightlevel = s->lightlevel;
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dest->SetPlaneLight(sector_t::floor, s->GetPlaneLight(sector_t::floor));
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dest->SetPlaneLight(sector_t::ceiling, s->GetPlaneLight(sector_t::ceiling));
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dest->ChangeFlags(sector_t::floor, -1, s->GetFlags(sector_t::floor));
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dest->ChangeFlags(sector_t::ceiling, -1, s->GetFlags(sector_t::ceiling));
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}
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return dest;
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}
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return sec;
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}
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}
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else
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{
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dest->SetPlaneTexZ(sector_t::floor, s->GetPlaneTexZ(sector_t::floor));
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dest->floorplane = s->floorplane;
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dest->vboindex[sector_t::floor] = sec->vboindex[sector_t::vbo_fakefloor];
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dest->vboheight[sector_t::floor] = s->vboheight[sector_t::floor];
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}
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if (!(s->MoreFlags&SECF_FAKEFLOORONLY))
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{
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if (diffTex)
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{
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if (s->ceilingplane.CopyPlaneIfValid (&dest->ceilingplane, &sec->floorplane))
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{
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dest->SetTexture(sector_t::ceiling, s->GetTexture(sector_t::ceiling), false);
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dest->SetPlaneTexZ(sector_t::ceiling, s->GetPlaneTexZ(sector_t::ceiling));
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dest->vboindex[sector_t::ceiling] = sec->vboindex[sector_t::vbo_fakeceiling];
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dest->vboheight[sector_t::ceiling] = s->vboheight[sector_t::ceiling];
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}
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}
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else
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{
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dest->ceilingplane = s->ceilingplane;
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dest->SetPlaneTexZ(sector_t::ceiling, s->GetPlaneTexZ(sector_t::ceiling));
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dest->vboindex[sector_t::ceiling] = sec->vboindex[sector_t::vbo_fakeceiling];
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dest->vboheight[sector_t::ceiling] = s->vboheight[sector_t::ceiling];
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}
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}
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if (in_area==area_below)
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{
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dest->CopyColors(s);
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dest->SetPlaneTexZ(sector_t::floor, sec->GetPlaneTexZ(sector_t::floor));
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dest->SetPlaneTexZ(sector_t::ceiling, s->GetPlaneTexZ(sector_t::floor));
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dest->floorplane=sec->floorplane;
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dest->ceilingplane=s->floorplane;
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dest->ceilingplane.FlipVert();
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dest->vboindex[sector_t::floor] = sec->vboindex[sector_t::floor];
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dest->vboheight[sector_t::floor] = sec->vboheight[sector_t::floor];
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dest->vboindex[sector_t::ceiling] = sec->vboindex[sector_t::vbo_fakefloor];
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dest->vboheight[sector_t::ceiling] = s->vboheight[sector_t::floor];
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dest->ClearPortal(sector_t::ceiling);
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if (!(s->MoreFlags & SECF_NOFAKELIGHT))
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{
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dest->lightlevel = s->lightlevel;
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}
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if (!back)
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{
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dest->SetTexture(sector_t::floor, diffTex ? sec->GetTexture(sector_t::floor) : s->GetTexture(sector_t::floor), false);
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dest->planes[sector_t::floor].xform = s->planes[sector_t::floor].xform;
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//dest->ceilingplane = s->floorplane;
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if (s->GetTexture(sector_t::ceiling) == skyflatnum)
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{
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dest->SetTexture(sector_t::ceiling, dest->GetTexture(sector_t::floor), false);
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//dest->floorplane = dest->ceilingplane;
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//dest->floorplane.FlipVert ();
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//dest->floorplane.ChangeHeight (+1);
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dest->planes[sector_t::ceiling].xform = dest->planes[sector_t::floor].xform;
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}
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else
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{
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dest->SetTexture(sector_t::ceiling, diffTex ? s->GetTexture(sector_t::floor) : s->GetTexture(sector_t::ceiling), false);
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dest->planes[sector_t::ceiling].xform = s->planes[sector_t::ceiling].xform;
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}
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if (!(s->MoreFlags & SECF_NOFAKELIGHT))
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{
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dest->SetPlaneLight(sector_t::floor, s->GetPlaneLight(sector_t::floor));
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dest->SetPlaneLight(sector_t::ceiling, s->GetPlaneLight(sector_t::ceiling));
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dest->ChangeFlags(sector_t::floor, -1, s->GetFlags(sector_t::floor));
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dest->ChangeFlags(sector_t::ceiling, -1, s->GetFlags(sector_t::ceiling));
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}
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}
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}
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else if (in_area == area_above)
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{
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dest->CopyColors(s);
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dest->SetPlaneTexZ(sector_t::ceiling, sec->GetPlaneTexZ(sector_t::ceiling));
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dest->SetPlaneTexZ(sector_t::floor, s->GetPlaneTexZ(sector_t::ceiling));
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dest->ceilingplane = sec->ceilingplane;
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dest->floorplane = s->ceilingplane;
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dest->floorplane.FlipVert();
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dest->vboindex[sector_t::floor] = sec->vboindex[sector_t::vbo_fakeceiling];
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dest->vboheight[sector_t::floor] = s->vboheight[sector_t::ceiling];
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dest->vboindex[sector_t::ceiling] = sec->vboindex[sector_t::ceiling];
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dest->vboheight[sector_t::ceiling] = sec->vboheight[sector_t::ceiling];
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dest->ClearPortal(sector_t::floor);
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if (!(s->MoreFlags & SECF_NOFAKELIGHT))
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{
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dest->lightlevel = s->lightlevel;
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}
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if (!back)
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{
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dest->SetTexture(sector_t::ceiling, diffTex ? sec->GetTexture(sector_t::ceiling) : s->GetTexture(sector_t::ceiling), false);
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dest->SetTexture(sector_t::floor, s->GetTexture(sector_t::ceiling), false);
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dest->planes[sector_t::ceiling].xform = dest->planes[sector_t::floor].xform = s->planes[sector_t::ceiling].xform;
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if (s->GetTexture(sector_t::floor) != skyflatnum)
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{
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dest->SetTexture(sector_t::floor, s->GetTexture(sector_t::floor), false);
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dest->planes[sector_t::floor].xform = s->planes[sector_t::floor].xform;
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}
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if (!(s->MoreFlags & SECF_NOFAKELIGHT))
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{
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dest->lightlevel = s->lightlevel;
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dest->SetPlaneLight(sector_t::floor, s->GetPlaneLight(sector_t::floor));
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dest->SetPlaneLight(sector_t::ceiling, s->GetPlaneLight(sector_t::ceiling));
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dest->ChangeFlags(sector_t::floor, -1, s->GetFlags(sector_t::floor));
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dest->ChangeFlags(sector_t::ceiling, -1, s->GetFlags(sector_t::ceiling));
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}
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}
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}
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return dest;
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}
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