140 lines
3.4 KiB
C++
140 lines
3.4 KiB
C++
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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Copyright (C) 1997 Greg Lewis
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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 General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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See file, 'COPYING', for details.
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*/
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// csg4.c
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#include <qbsp/brush.hh>
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#include <qbsp/csg4.hh>
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#include <qbsp/map.hh>
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#include <qbsp/solidbsp.hh>
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#include <qbsp/qbsp.hh>
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#include <atomic>
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#include <mutex>
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#include "tbb/parallel_for.h"
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/*
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NOTES
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-----
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Brushes that touch still need to be split at the cut point to make a tjunction
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*/
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/*
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==================
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NewFaceFromFace
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Duplicates the non point information of a face, used by SplitFace and
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MergeFace.
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==================
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*/
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face_t *NewFaceFromFace(const face_t *in)
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{
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face_t *newf = new face_t{};
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newf->planenum = in->planenum;
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newf->texinfo = in->texinfo;
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newf->planeside = in->planeside;
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newf->contents = in->contents;
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newf->lmshift = in->lmshift;
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newf->origin = in->origin;
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newf->radius = in->radius;
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return newf;
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}
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face_t* CopyFace(const face_t* in)
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{
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face_t *temp = NewFaceFromFace(in);
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temp->w = in->w;
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return temp;
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}
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void UpdateFaceSphere(face_t *in)
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{
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in->origin = in->w.center();
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in->radius = 0;
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for (size_t i = 0; i < in->w.size(); i++) {
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in->radius = max(in->radius, qv::distance2(in->w[i], in->origin));
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}
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in->radius = sqrt(in->radius);
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}
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/*
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==================
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SplitFace
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Frees in. Returns {front, back}
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==================
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*/
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std::tuple<face_t *, face_t *> SplitFace(face_t *in, const qplane3d &split)
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{
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if (in->w.size() < 0)
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Error("Attempting to split freed face");
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/* Fast test */
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double dot = split.distance_to(in->origin);
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if (dot > in->radius) {
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// all in front
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return {in, nullptr};
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} else if (dot < -in->radius) {
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// all behind
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return {nullptr, in};
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}
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auto [front_winding, back_winding] = in->w.clip(split, options.epsilon.value(), true);
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if (front_winding && !back_winding) {
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// all in front
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return {in, nullptr};
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} else if (back_winding && !front_winding) {
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// all behind
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return {nullptr, in};
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}
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face_t *new_front = NewFaceFromFace(in);
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new_front->w = std::move(front_winding.value());
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face_t *new_back = NewFaceFromFace(in);
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new_back->w = std::move(back_winding.value());
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if (new_front->w.size() > MAXEDGES || new_back->w.size() > MAXEDGES)
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FError("Internal error: numpoints > MAXEDGES");
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/* free the original face now that it is represented by the fragments */
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delete in;
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return {new_front, new_back};
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}
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face_t *MirrorFace(const face_t *face)
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{
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face_t *newface = NewFaceFromFace(face);
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newface->w = face->w.flip();
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newface->planeside = static_cast<side_t>(face->planeside ^ 1);
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newface->contents.swap();
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newface->lmshift.swap();
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return newface;
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}
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