raze/source/core/rendering/hw_sections.cpp
Christoph Oelckers 30b1b046e4 - added an intermediate data structure to decouple the rendering from the immediate map data.
This will be needed for sectors consisting of disjoint parts and for providing some help with addressing rendering anomalies
2021-05-03 00:04:36 +02:00

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/*
** hw_sectiona.cpp
** For decoupling the renderer from internal Build structures
**
**---------------------------------------------------------------------------
** Copyright 2021 Christoph Oelckers
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
** The sole reason for existence of this file is that Build's sector setup
** does not allow for easy splitting of sectors, either for having disjoint parts
** or requiring partial rendering. So we need to add a superstructure
** where we can shuffle around some content without disturbing the original
** order...
**
*/
#include "hw_sections.h"
SectionLine sectionLines[MAXWALLS + (MAXWALLS >> 2)];
Section sections[MAXSECTORS + (MAXSECTORS >> 2)];
TArray<int> sectionspersector[MAXSECTORS]; // reverse map, mainly for the automap
int numsections;
int numsectionlines;
void hw_BuildSections()
{
// Initial setup just creates a 1:1 mapping of walls to section lines and sectors to sections.
numsectionlines = numwalls;
numsections = numsectors;
for (int i = 0; i < numwalls; i++)
{
sectionLines[i].startpoint = sectionLines[i].wall = i;
sectionLines[i].endpoint = wall[i].point2;
sectionLines[i].partner = wall[i].nextwall;
sectionLines[i].section = wall[i].sector;
sectionLines[i].partnersection = wall[i].nextsector;
sectionLines[i].point2index = wall[i].point2 - sector[wall[i].sector].wallptr;
}
for (int i = 0; i < numsectors; i++)
{
sections[i].sector = i;
sections[i].lines.Resize(sector[i].wallnum);
for (int j = 0; j < sector[i].wallnum; j++) sections[i].lines[j] = sector[i].wallptr + j;
sectionspersector[i].Resize(1);
sectionspersector[i][0] = i;
}
}