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397 lines
11 KiB
C++
397 lines
11 KiB
C++
//
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//---------------------------------------------------------------------------
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//
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// Copyright(C) 2002-2016 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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#include "gl/system/gl_system.h"
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#include "a_sharedglobal.h"
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#include "g_level.h"
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#include "r_sky.h"
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#include "r_state.h"
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#include "r_utility.h"
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#include "doomdata.h"
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#include "portal.h"
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#include "g_levellocals.h"
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#include "gl/gl_functions.h"
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#include "gl/data/gl_data.h"
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#include "gl/renderer/gl_lightdata.h"
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#include "gl/scene/gl_drawinfo.h"
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#include "gl/scene/gl_portal.h"
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#include "gl/textures/gl_material.h"
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#include "gl/utility/gl_convert.h"
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CVAR(Bool,gl_noskyboxes, false, 0)
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extern int skyfog;
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//==========================================================================
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//
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// Set up the skyinfo struct
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//
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//==========================================================================
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void GLSkyInfo::init(int sky1, PalEntry FadeColor)
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{
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memset(this, 0, sizeof(*this));
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if ((sky1 & PL_SKYFLAT) && (sky1 & (PL_SKYFLAT - 1)))
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{
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const line_t *l = &level.lines[(sky1&(PL_SKYFLAT - 1)) - 1];
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const side_t *s = l->sidedef[0];
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int pos;
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if (level.flags & LEVEL_SWAPSKIES && s->GetTexture(side_t::bottom).isValid())
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{
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pos = side_t::bottom;
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}
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else
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{
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pos = side_t::top;
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}
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FTextureID texno = s->GetTexture(pos);
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texture[0] = FMaterial::ValidateTexture(texno, false, true);
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if (!texture[0] || texture[0]->tex->UseType == FTexture::TEX_Null) goto normalsky;
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skytexno1 = texno;
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x_offset[0] = s->GetTextureXOffset(pos) * (360.f/65536.f);
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y_offset = s->GetTextureYOffset(pos);
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mirrored = !l->args[2];
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}
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else
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{
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normalsky:
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if (level.flags&LEVEL_DOUBLESKY)
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{
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texture[1] = FMaterial::ValidateTexture(sky1texture, false, true);
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x_offset[1] = GLRenderer->mSky1Pos;
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doublesky = true;
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}
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if ((level.flags&LEVEL_SWAPSKIES || (sky1 == PL_SKYFLAT) || (level.flags&LEVEL_DOUBLESKY)) &&
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sky2texture != sky1texture) // If both skies are equal use the scroll offset of the first!
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{
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texture[0] = FMaterial::ValidateTexture(sky2texture, false, true);
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skytexno1 = sky2texture;
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sky2 = true;
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x_offset[0] = GLRenderer->mSky2Pos;
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}
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else if (!doublesky)
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{
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texture[0] = FMaterial::ValidateTexture(sky1texture, false, true);
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skytexno1 = sky1texture;
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x_offset[0] = GLRenderer->mSky1Pos;
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}
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}
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if (skyfog > 0)
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{
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fadecolor = FadeColor;
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fadecolor.a = 0;
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}
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else fadecolor = 0;
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}
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//==========================================================================
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//
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// Calculate sky texture for ceiling or floor
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//
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//==========================================================================
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void GLWall::SkyPlane(sector_t *sector, int plane, bool allowreflect)
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{
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int ptype = -1;
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FSectorPortal *sportal = sector->ValidatePortal(plane);
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if (sportal != nullptr && sportal->mFlags & PORTSF_INSKYBOX) sportal = nullptr; // no recursions, delete it here to simplify the following code
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// Either a regular sky or a skybox with skyboxes disabled
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if ((sportal == nullptr && sector->GetTexture(plane) == skyflatnum) || (gl_noskyboxes && sportal != nullptr && sportal->mType == PORTS_SKYVIEWPOINT))
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{
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GLSkyInfo skyinfo;
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skyinfo.init(sector->sky, Colormap.FadeColor);
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ptype = PORTALTYPE_SKY;
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sky = UniqueSkies.Get(&skyinfo);
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}
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else if (sportal != nullptr)
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{
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switch (sportal->mType)
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{
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case PORTS_STACKEDSECTORTHING:
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case PORTS_PORTAL:
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case PORTS_LINKEDPORTAL:
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{
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FPortal *glport = sector->GetGLPortal(plane);
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if (glport != NULL)
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{
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if (sector->PortalBlocksView(plane)) return;
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if (GLPortal::instack[1 - plane]) return;
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ptype = PORTALTYPE_SECTORSTACK;
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portal = glport;
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}
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break;
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}
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case PORTS_SKYVIEWPOINT:
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case PORTS_HORIZON:
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case PORTS_PLANE:
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ptype = PORTALTYPE_SKYBOX;
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secportal = sportal;
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break;
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}
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}
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else if (allowreflect && sector->GetReflect(plane) > 0)
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{
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if ((plane == sector_t::ceiling && ViewPos.Z > sector->ceilingplane.fD()) ||
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(plane == sector_t::floor && ViewPos.Z < -sector->floorplane.fD())) return;
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ptype = PORTALTYPE_PLANEMIRROR;
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planemirror = plane == sector_t::ceiling ? §or->ceilingplane : §or->floorplane;
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}
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if (ptype != -1)
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{
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PutPortal(ptype);
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}
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}
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//==========================================================================
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//
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// Calculate sky texture for a line
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//
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//==========================================================================
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void GLWall::SkyLine(sector_t *fs, line_t *line)
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{
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FSectorPortal *secport = line->GetTransferredPortal();
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GLSkyInfo skyinfo;
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int ptype;
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// JUSTHIT is used as an indicator that a skybox is in use.
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// This is to avoid recursion
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if (!gl_noskyboxes && secport && (secport->mSkybox == nullptr || !(secport->mFlags & PORTSF_INSKYBOX)))
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{
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ptype = PORTALTYPE_SKYBOX;
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secportal = secport;
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}
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else
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{
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skyinfo.init(fs->sky, Colormap.FadeColor);
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ptype = PORTALTYPE_SKY;
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sky = UniqueSkies.Get(&skyinfo);
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}
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ztop[0] = zceil[0];
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ztop[1] = zceil[1];
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zbottom[0] = zfloor[0];
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zbottom[1] = zfloor[1];
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PutPortal(ptype);
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}
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//==========================================================================
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//
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// Skies on one sided walls
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//
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//==========================================================================
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void GLWall::SkyNormal(sector_t * fs,vertex_t * v1,vertex_t * v2)
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{
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ztop[0]=ztop[1]=32768.0f;
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zbottom[0]=zceil[0];
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zbottom[1]=zceil[1];
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SkyPlane(fs, sector_t::ceiling, true);
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ztop[0]=zfloor[0];
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ztop[1]=zfloor[1];
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zbottom[0]=zbottom[1]=-32768.0f;
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SkyPlane(fs, sector_t::floor, true);
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}
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//==========================================================================
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//
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// Upper Skies on two sided walls
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//
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//==========================================================================
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void GLWall::SkyTop(seg_t * seg,sector_t * fs,sector_t * bs,vertex_t * v1,vertex_t * v2)
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{
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if (fs->GetTexture(sector_t::ceiling)==skyflatnum)
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{
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if (bs->special == GLSector_NoSkyDraw) return;
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if (bs->GetTexture(sector_t::ceiling)==skyflatnum)
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{
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// if the back sector is closed the sky must be drawn!
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if (bs->ceilingplane.ZatPoint(v1) > bs->floorplane.ZatPoint(v1) ||
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bs->ceilingplane.ZatPoint(v2) > bs->floorplane.ZatPoint(v2) || bs->transdoor)
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return;
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// one more check for some ugly transparent door hacks
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if (!bs->floorplane.isSlope() && !fs->floorplane.isSlope())
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{
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if (bs->GetPlaneTexZ(sector_t::floor)==fs->GetPlaneTexZ(sector_t::floor)+1.)
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{
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FTexture * tex = TexMan(seg->sidedef->GetTexture(side_t::bottom));
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if (!tex || tex->UseType==FTexture::TEX_Null) return;
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// very, very, very ugly special case (See Icarus MAP14)
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// It is VERY important that this is only done for a floor height difference of 1
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// or it will cause glitches elsewhere.
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tex = TexMan(seg->sidedef->GetTexture(side_t::mid));
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if (tex != NULL && !(seg->linedef->flags & ML_DONTPEGTOP) &&
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seg->sidedef->GetTextureYOffset(side_t::mid) > 0)
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{
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ztop[0]=ztop[1]=32768.0f;
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zbottom[0]=zbottom[1]=
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bs->ceilingplane.ZatPoint(v2) + seg->sidedef->GetTextureYOffset(side_t::mid);
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SkyPlane(fs, sector_t::ceiling, false);
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return;
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}
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}
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}
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}
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ztop[0]=ztop[1]=32768.0f;
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FTexture * tex = TexMan(seg->sidedef->GetTexture(side_t::top));
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if (bs->GetTexture(sector_t::ceiling) != skyflatnum)
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{
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zbottom[0]=zceil[0];
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zbottom[1]=zceil[1];
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}
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else
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{
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zbottom[0] = bs->ceilingplane.ZatPoint(v1);
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zbottom[1] = bs->ceilingplane.ZatPoint(v2);
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flags|=GLWF_SKYHACK; // mid textures on such lines need special treatment!
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}
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}
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else
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{
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float frontreflect = fs->GetReflect(sector_t::ceiling);
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if (frontreflect > 0)
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{
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float backreflect = bs->GetReflect(sector_t::ceiling);
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if (backreflect > 0 && bs->ceilingplane.fD() == fs->ceilingplane.fD())
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{
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// Don't add intra-portal line to the portal.
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return;
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}
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}
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else
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{
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int type = fs->GetPortalType(sector_t::ceiling);
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if (type == PORTS_STACKEDSECTORTHING || type == PORTS_PORTAL || type == PORTS_LINKEDPORTAL)
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{
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FPortal *pfront = fs->GetGLPortal(sector_t::ceiling);
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FPortal *pback = bs->GetGLPortal(sector_t::ceiling);
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if (pfront == NULL || fs->PortalBlocksView(sector_t::ceiling)) return;
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if (pfront == pback && !bs->PortalBlocksView(sector_t::ceiling)) return;
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}
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}
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// stacked sectors
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ztop[0] = ztop[1] = 32768.0f;
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zbottom[0] = fs->ceilingplane.ZatPoint(v1);
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zbottom[1] = fs->ceilingplane.ZatPoint(v2);
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}
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SkyPlane(fs, sector_t::ceiling, true);
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}
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//==========================================================================
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//
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// Lower Skies on two sided walls
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//
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//==========================================================================
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void GLWall::SkyBottom(seg_t * seg,sector_t * fs,sector_t * bs,vertex_t * v1,vertex_t * v2)
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{
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if (fs->GetTexture(sector_t::floor)==skyflatnum)
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{
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if (bs->special == GLSector_NoSkyDraw) return;
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FTexture * tex = TexMan(seg->sidedef->GetTexture(side_t::bottom));
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// For lower skies the normal logic only applies to walls with no lower texture!
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if (tex->UseType==FTexture::TEX_Null)
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{
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if (bs->GetTexture(sector_t::floor)==skyflatnum)
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{
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// if the back sector is closed the sky must be drawn!
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if (bs->ceilingplane.ZatPoint(v1) > bs->floorplane.ZatPoint(v1) ||
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bs->ceilingplane.ZatPoint(v2) > bs->floorplane.ZatPoint(v2))
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return;
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}
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else
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{
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// Special hack for Vrack2b
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if (bs->floorplane.ZatPoint(ViewPos) > ViewPos.Z) return;
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}
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}
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zbottom[0]=zbottom[1]=-32768.0f;
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if ((tex && tex->UseType!=FTexture::TEX_Null) || bs->GetTexture(sector_t::floor)!=skyflatnum)
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{
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ztop[0]=zfloor[0];
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ztop[1]=zfloor[1];
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}
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else
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{
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ztop[0] = bs->floorplane.ZatPoint(v1);
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ztop[1] = bs->floorplane.ZatPoint(v2);
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flags|=GLWF_SKYHACK; // mid textures on such lines need special treatment!
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}
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}
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else
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{
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float frontreflect = fs->GetReflect(sector_t::floor);
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if (frontreflect > 0)
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{
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float backreflect = bs->GetReflect(sector_t::floor);
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if (backreflect > 0 && bs->floorplane.fD() == fs->floorplane.fD())
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{
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// Don't add intra-portal line to the portal.
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return;
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}
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}
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else
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{
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int type = fs->GetPortalType(sector_t::floor);
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if (type == PORTS_STACKEDSECTORTHING || type == PORTS_PORTAL || type == PORTS_LINKEDPORTAL)
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{
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FPortal *pfront = fs->GetGLPortal(sector_t::floor);
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FPortal *pback = bs->GetGLPortal(sector_t::floor);
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if (pfront == NULL || fs->PortalBlocksView(sector_t::floor)) return;
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if (pfront == pback && !bs->PortalBlocksView(sector_t::floor)) return;
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}
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}
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// stacked sectors
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zbottom[0]=zbottom[1]=-32768.0f;
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ztop[0] = fs->floorplane.ZatPoint(v1);
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ztop[1] = fs->floorplane.ZatPoint(v2);
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}
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SkyPlane(fs, sector_t::floor, true);
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}
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