mirror of
https://github.com/ZDoom/gzdoom.git
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289 lines
8.8 KiB
C++
289 lines
8.8 KiB
C++
/*
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** p_3dmidtex.cpp
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**
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** Eternity-style 3D-midtex handling
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** (No original Eternity code here!)
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**
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**---------------------------------------------------------------------------
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** Copyright 2008 Christoph Oelckers
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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*/
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#include "templates.h"
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#include "p_local.h"
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//============================================================================
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//
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// P_Scroll3dMidtex
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//
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// Scrolls all sidedefs belonging to 3dMidtex lines attached to this sector
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//
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//============================================================================
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bool P_Scroll3dMidtex(sector_t *sector, int crush, fixed_t move, bool ceiling)
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{
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extsector_t::midtex::plane &scrollplane = ceiling? sector->e->Midtex.Ceiling : sector->e->Midtex.Floor;
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// First step: Change all lines' texture offsets
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for(unsigned i = 0; i < scrollplane.AttachedLines.Size(); i++)
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{
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line_t *l = scrollplane.AttachedLines[i];
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l->sidedef[0]->AddTextureYOffset(side_t::mid, move);
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l->sidedef[1]->AddTextureYOffset(side_t::mid, move);
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}
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// Second step: Check all sectors whether the move is ok.
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bool res = false;
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for(unsigned i = 0; i < scrollplane.AttachedSectors.Size(); i++)
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{
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res |= P_ChangeSector(scrollplane.AttachedSectors[i], crush, move, 2, true);
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}
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return !res;
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}
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//============================================================================
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//
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// P_Start3DMidtexInterpolations
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//
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// Starts interpolators for every sidedef that is being changed by moving
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// this sector
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//
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//============================================================================
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void P_Start3dMidtexInterpolations(TArray<DInterpolation *> &list, sector_t *sector, bool ceiling)
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{
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extsector_t::midtex::plane &scrollplane = ceiling? sector->e->Midtex.Ceiling : sector->e->Midtex.Floor;
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for(unsigned i = 0; i < scrollplane.AttachedLines.Size(); i++)
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{
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line_t *l = scrollplane.AttachedLines[i];
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list.Push(l->sidedef[0]->SetInterpolation(side_t::mid));
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list.Push(l->sidedef[1]->SetInterpolation(side_t::mid));
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}
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}
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//============================================================================
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//
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// P_Attach3dMidtexLinesToSector
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//
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// Attaches 3dMidtex lines to a sector.
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// If lineid is != 0, all lines with the matching line id will be added
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// If tag is != 0, all lines touching a sector with the matching tag will be added
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// If both are != 0, all lines with the matching line id that touch a sector with
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// the matching tag will be added.
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//
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//============================================================================
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void P_Attach3dMidtexLinesToSector(sector_t *sector, int lineid, int tag, bool ceiling)
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{
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int v;
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if (lineid == 0 && tag == 0)
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{
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// invalid set of parameters
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return;
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}
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extsector_t::midtex::plane &scrollplane = ceiling? sector->e->Midtex.Ceiling : sector->e->Midtex.Floor;
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// Bit arrays that mark whether a line or sector is to be attached.
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BYTE *found_lines = new BYTE[(numlines+7)/8];
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BYTE *found_sectors = new BYTE[(numsectors+7)/8];
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memset(found_lines, 0, sizeof (BYTE) * ((numlines+7)/8));
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memset(found_sectors, 0, sizeof (BYTE) * ((numsectors+7)/8));
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// mark all lines and sectors that are already attached to this one
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// and clear the arrays. The old data will be re-added automatically
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// from the marker arrays.
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for (unsigned i=0; i < scrollplane.AttachedLines.Size(); i++)
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{
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int line = int(scrollplane.AttachedLines[i] - lines);
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found_lines[line>>3] |= 1 << (line&7);
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}
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for (unsigned i=0; i < scrollplane.AttachedSectors.Size(); i++)
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{
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int sec = int(scrollplane.AttachedSectors[i] - sectors);
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found_sectors[sec>>3] |= 1 << (sec&7);
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}
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scrollplane.AttachedLines.Clear();
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scrollplane.AttachedSectors.Clear();
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if (tag == 0)
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{
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for(int line = -1; (line = P_FindLineFromID(lineid,line)) >= 0; )
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{
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line_t *ln = &lines[line];
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if (ln->frontsector == NULL || ln->backsector == NULL || !(ln->flags & ML_3DMIDTEX))
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{
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// Only consider two-sided lines with the 3DMIDTEX flag
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continue;
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}
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found_lines[line>>3] |= 1 << (line&7);
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}
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}
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else
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{
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for(int sec = -1; (sec = P_FindSectorFromTag(tag, sec)) >= 0; )
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{
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for (int line = 0; line < sectors[sec].linecount; line ++)
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{
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line_t *ln = sectors[sec].lines[line];
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if (lineid != 0 && ln->id != lineid) continue;
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if (ln->frontsector == NULL || ln->backsector == NULL || !(ln->flags & ML_3DMIDTEX))
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{
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// Only consider two-sided lines with the 3DMIDTEX flag
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continue;
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}
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int lineno = int(ln-lines);
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found_lines[lineno>>3] |= 1 << (lineno&7);
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}
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}
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}
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for(int i=0; i < numlines; i++)
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{
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if (found_lines[i>>3] & (1 << (i&7)))
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{
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scrollplane.AttachedLines.Push(&lines[i]);
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v = int(lines[i].frontsector - sectors);
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assert(v < numsectors);
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found_sectors[v>>3] |= 1 << (v&7);
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v = int(lines[i].backsector - sectors);
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assert(v < numsectors);
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found_sectors[v>>3] |= 1 << (v&7);
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}
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}
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for (int i=0; i < numsectors; i++)
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{
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if (found_sectors[i>>3] & (1 << (i&7)))
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{
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scrollplane.AttachedSectors.Push(§ors[i]);
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}
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}
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delete[] found_lines;
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delete[] found_sectors;
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}
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//============================================================================
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//
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// P_GetMidTexturePosition
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//
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// Retrieves top and bottom of the current line's mid texture.
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//
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//============================================================================
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bool P_GetMidTexturePosition(const line_t *line, int sideno, fixed_t *ptextop, fixed_t *ptexbot)
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{
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if (line->sidedef[0]==NULL || line->sidedef[1]==NULL) return false;
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side_t *side = line->sidedef[sideno];
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FTextureID texnum = side->GetTexture(side_t::mid);
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if (!texnum.isValid()) return false;
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FTexture * tex= TexMan(texnum);
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if (!tex) return false;
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fixed_t y_offset = side->GetTextureYOffset(side_t::mid);
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fixed_t textureheight = tex->GetScaledHeight() << FRACBITS;
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if (tex->yScale != FRACUNIT && !tex->bWorldPanning)
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{
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y_offset = FixedDiv(y_offset, tex->yScale);
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}
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if(line->flags & ML_DONTPEGBOTTOM)
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{
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*ptexbot = y_offset +
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MAX<fixed_t>(line->frontsector->GetPlaneTexZ(sector_t::floor), line->backsector->GetPlaneTexZ(sector_t::floor));
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*ptextop = *ptexbot + textureheight;
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}
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else
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{
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*ptextop = y_offset +
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MIN<fixed_t>(line->frontsector->GetPlaneTexZ(sector_t::ceiling), line->backsector->GetPlaneTexZ(sector_t::ceiling));
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*ptexbot = *ptextop - textureheight;
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}
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return true;
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}
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//============================================================================
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//
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// P_LineOpening_3dMidtex
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//
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// 3dMidtex part of P_LineOpening
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//
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//============================================================================
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bool P_LineOpening_3dMidtex(AActor *thing, const line_t *linedef, fixed_t &opentop, fixed_t &openbottom)
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{
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fixed_t tt, tb;
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if (P_GetMidTexturePosition(linedef, 0, &tt, &tb))
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{
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if (thing->z + (thing->height/2) < (tt + tb)/2)
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{
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if(tb < opentop) opentop = tb;
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}
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else
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{
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if(tt > openbottom) openbottom = tt;
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// returns true if it touches the midtexture
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return (abs(thing->z - tt) <= thing->MaxStepHeight);
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}
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}
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return false;
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/* still have to figure out what this code from Eternity means...
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if((linedef->flags & ML_BLOCKMONSTERS) &&
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!(mo->flags & (MF_FLOAT | MF_DROPOFF)) &&
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D_abs(mo->z - textop) <= 24*FRACUNIT)
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{
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opentop = openbottom;
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openrange = 0;
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return;
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}
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*/
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}
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