mirror of
https://github.com/dhewm/dhewm3.git
synced 2024-12-13 22:31:25 +00:00
709 lines
13 KiB
C++
709 lines
13 KiB
C++
/*
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===========================================================================
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Doom 3 GPL Source Code
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Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
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This file is part of the Doom 3 GPL Source Code ("Doom 3 Source Code").
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Doom 3 Source Code 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 3 of the License, or
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(at your option) any later version.
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Doom 3 Source Code 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 Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code. If not, please request a copy in writing from id Software at the address below.
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If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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===========================================================================
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*/
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#include "../../../idlib/precompiled.h"
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#pragma hdrstop
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#include "dmap.h"
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int c_active_brushes;
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int c_nodes;
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// if a brush just barely pokes onto the other side,
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// let it slide by without chopping
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#define PLANESIDE_EPSILON 0.001
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//0.1
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/*
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================
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CountBrushList
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================
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*/
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int CountBrushList (uBrush_t *brushes)
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{
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int c;
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c = 0;
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for ( ; brushes ; brushes = brushes->next)
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c++;
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return c;
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}
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int BrushSizeForSides( int numsides ) {
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int c;
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// allocate a structure with a variable number of sides at the end
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// c = (int)&(((uBrush_t *)0)->sides[numsides]); // bounds checker complains about this
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c = sizeof( uBrush_t ) + sizeof( side_t ) * (numsides - 6);
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return c;
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}
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/*
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================
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AllocBrush
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================
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*/
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uBrush_t *AllocBrush (int numsides)
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{
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uBrush_t *bb;
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int c;
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c = BrushSizeForSides( numsides );
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bb = (uBrush_t *)Mem_Alloc(c);
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memset (bb, 0, c);
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c_active_brushes++;
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return bb;
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}
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/*
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================
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FreeBrush
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================
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*/
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void FreeBrush (uBrush_t *brushes)
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{
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int i;
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for ( i = 0 ; i < brushes->numsides ; i++ ) {
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if ( brushes->sides[i].winding ) {
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delete brushes->sides[i].winding;
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}
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if ( brushes->sides[i].visibleHull ) {
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delete brushes->sides[i].visibleHull;
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}
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}
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Mem_Free (brushes);
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c_active_brushes--;
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}
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/*
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================
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FreeBrushList
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================
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*/
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void FreeBrushList (uBrush_t *brushes)
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{
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uBrush_t *next;
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for ( ; brushes ; brushes = next)
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{
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next = brushes->next;
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FreeBrush (brushes);
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}
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}
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/*
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==================
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CopyBrush
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Duplicates the brush, the sides, and the windings
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==================
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*/
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uBrush_t *CopyBrush (uBrush_t *brush)
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{
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uBrush_t *newbrush;
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int size;
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int i;
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size = BrushSizeForSides( brush->numsides );
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newbrush = AllocBrush (brush->numsides);
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memcpy (newbrush, brush, size);
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for (i=0 ; i<brush->numsides ; i++)
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{
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if (brush->sides[i].winding)
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newbrush->sides[i].winding = brush->sides[i].winding->Copy();
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}
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return newbrush;
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}
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/*
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================
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DrawBrushList
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================
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*/
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void DrawBrushList (uBrush_t *brush)
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{
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int i;
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side_t *s;
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GLS_BeginScene ();
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for ( ; brush ; brush=brush->next)
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{
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for (i=0 ; i<brush->numsides ; i++)
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{
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s = &brush->sides[i];
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if (!s->winding)
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continue;
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GLS_Winding (s->winding, 0);
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}
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}
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GLS_EndScene ();
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}
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/*
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=============
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PrintBrush
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=============
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*/
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void PrintBrush (uBrush_t *brush)
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{
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int i;
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common->Printf( "brush: %p\n", brush );
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for ( i=0;i<brush->numsides ; i++ ) {
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brush->sides[i].winding->Print();
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common->Printf ("\n");
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}
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}
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/*
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==================
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BoundBrush
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Sets the mins/maxs based on the windings
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returns false if the brush doesn't enclose a valid volume
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==================
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*/
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bool BoundBrush (uBrush_t *brush) {
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int i, j;
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idWinding *w;
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brush->bounds.Clear();
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for ( i = 0; i < brush->numsides; i++ ) {
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w = brush->sides[i].winding;
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if (!w)
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continue;
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for ( j = 0; j < w->GetNumPoints(); j++ )
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brush->bounds.AddPoint( (*w)[j].ToVec3() );
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}
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for ( i = 0; i < 3; i++ ) {
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if (brush->bounds[0][i] < MIN_WORLD_COORD || brush->bounds[1][i] > MAX_WORLD_COORD
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|| brush->bounds[0][i] >= brush->bounds[1][i] ) {
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return false;
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}
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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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CreateBrushWindings
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makes basewindigs for sides and mins / maxs for the brush
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returns false if the brush doesn't enclose a valid volume
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==================
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*/
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bool CreateBrushWindings (uBrush_t *brush) {
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int i, j;
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idWinding *w;
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idPlane *plane;
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side_t *side;
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for ( i = 0; i < brush->numsides; i++ ) {
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side = &brush->sides[i];
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plane = &dmapGlobals.mapPlanes[side->planenum];
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w = new idWinding( *plane );
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for ( j = 0; j < brush->numsides && w; j++ ) {
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if ( i == j ) {
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continue;
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}
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if ( brush->sides[j].planenum == ( brush->sides[i].planenum ^ 1 ) ) {
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continue; // back side clipaway
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}
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plane = &dmapGlobals.mapPlanes[brush->sides[j].planenum^1];
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w = w->Clip( *plane, 0 );//CLIP_EPSILON);
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}
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if ( side->winding ) {
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delete side->winding;
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}
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side->winding = w;
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}
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return BoundBrush( brush );
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}
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/*
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==================
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BrushFromBounds
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Creates a new axial brush
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==================
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*/
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uBrush_t *BrushFromBounds( const idBounds &bounds ) {
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uBrush_t *b;
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int i;
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idPlane plane;
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b = AllocBrush (6);
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b->numsides = 6;
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for (i=0 ; i<3 ; i++) {
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plane[0] = plane[1] = plane[2] = 0;
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plane[i] = 1;
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plane[3] = -bounds[1][i];
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b->sides[i].planenum = FindFloatPlane( plane );
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plane[i] = -1;
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plane[3] = bounds[0][i];
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b->sides[3+i].planenum = FindFloatPlane( plane );
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}
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CreateBrushWindings (b);
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return b;
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}
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/*
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==================
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BrushVolume
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==================
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*/
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float BrushVolume (uBrush_t *brush) {
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int i;
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idWinding *w;
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idVec3 corner;
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float d, area, volume;
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idPlane *plane;
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if (!brush)
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return 0;
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// grab the first valid point as the corner
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w = NULL;
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for ( i = 0; i < brush->numsides; i++ ) {
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w = brush->sides[i].winding;
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if (w)
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break;
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}
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if (!w) {
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return 0;
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}
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VectorCopy ( (*w)[0], corner);
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// make tetrahedrons to all other faces
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volume = 0;
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for ( ; i < brush->numsides; i++ )
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{
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w = brush->sides[i].winding;
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if (!w)
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continue;
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plane = &dmapGlobals.mapPlanes[brush->sides[i].planenum];
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d = -plane->Distance( corner );
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area = w->GetArea();
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volume += d * area;
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}
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volume /= 3;
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return volume;
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}
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/*
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==================
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WriteBspBrushMap
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FIXME: use new brush format
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==================
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*/
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void WriteBspBrushMap( const char *name, uBrush_t *list ) {
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idFile * f;
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side_t * s;
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int i;
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idWinding * w;
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common->Printf ("writing %s\n", name);
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f = fileSystem->OpenFileWrite( name );
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if ( !f ) {
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common->Error( "Can't write %s\b", name);
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}
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f->Printf( "{\n\"classname\" \"worldspawn\"\n" );
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for ( ; list ; list=list->next )
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{
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f->Printf( "{\n" );
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for (i=0,s=list->sides ; i<list->numsides ; i++,s++)
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{
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w = new idWinding( dmapGlobals.mapPlanes[s->planenum] );
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f->Printf ("( %i %i %i ) ", (int)(*w)[0][0], (int)(*w)[0][1], (int)(*w)[0][2]);
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f->Printf ("( %i %i %i ) ", (int)(*w)[1][0], (int)(*w)[1][1], (int)(*w)[1][2]);
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f->Printf ("( %i %i %i ) ", (int)(*w)[2][0], (int)(*w)[2][1], (int)(*w)[2][2]);
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f->Printf ("notexture 0 0 0 1 1\n" );
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delete w;
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}
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f->Printf ("}\n");
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}
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f->Printf ("}\n");
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fileSystem->CloseFile(f);
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}
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//=====================================================================================
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/*
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====================
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FilterBrushIntoTree_r
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====================
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*/
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int FilterBrushIntoTree_r( uBrush_t *b, node_t *node ) {
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uBrush_t *front, *back;
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int c;
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if ( !b ) {
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return 0;
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}
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// add it to the leaf list
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if ( node->planenum == PLANENUM_LEAF ) {
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b->next = node->brushlist;
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node->brushlist = b;
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// classify the leaf by the structural brush
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if ( b->opaque ) {
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node->opaque = true;
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}
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return 1;
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}
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// split it by the node plane
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SplitBrush ( b, node->planenum, &front, &back );
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FreeBrush( b );
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c = 0;
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c += FilterBrushIntoTree_r( front, node->children[0] );
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c += FilterBrushIntoTree_r( back, node->children[1] );
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return c;
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}
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/*
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=====================
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FilterBrushesIntoTree
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Mark the leafs as opaque and areaportals and put brush
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fragments in each leaf so portal surfaces can be matched
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to materials
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=====================
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*/
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void FilterBrushesIntoTree( uEntity_t *e ) {
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primitive_t *prim;
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uBrush_t *b, *newb;
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int r;
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int c_unique, c_clusters;
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common->Printf( "----- FilterBrushesIntoTree -----\n");
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c_unique = 0;
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c_clusters = 0;
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for ( prim = e->primitives ; prim ; prim = prim->next ) {
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b = prim->brush;
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if ( !b ) {
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continue;
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}
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c_unique++;
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newb = CopyBrush( b );
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r = FilterBrushIntoTree_r( newb, e->tree->headnode );
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c_clusters += r;
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}
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common->Printf( "%5i total brushes\n", c_unique );
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common->Printf( "%5i cluster references\n", c_clusters );
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}
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/*
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================
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AllocTree
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================
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*/
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tree_t *AllocTree (void)
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{
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tree_t *tree;
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tree = (tree_t *)Mem_Alloc(sizeof(*tree));
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memset (tree, 0, sizeof(*tree));
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tree->bounds.Clear();
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return tree;
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}
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/*
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================
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AllocNode
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================
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*/
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node_t *AllocNode (void)
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{
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node_t *node;
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node = (node_t *)Mem_Alloc(sizeof(*node));
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memset (node, 0, sizeof(*node));
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return node;
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}
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//============================================================
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/*
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==================
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BrushMostlyOnSide
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==================
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*/
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int BrushMostlyOnSide (uBrush_t *brush, idPlane &plane) {
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int i, j;
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idWinding *w;
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float d, max;
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int side;
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max = 0;
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side = PSIDE_FRONT;
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for ( i = 0; i < brush->numsides; i++ ) {
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w = brush->sides[i].winding;
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if (!w)
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continue;
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for ( j = 0; j < w->GetNumPoints(); j++ )
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{
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d = plane.Distance( (*w)[j].ToVec3() );
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if (d > max)
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{
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max = d;
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side = PSIDE_FRONT;
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}
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if (-d > max)
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{
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max = -d;
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side = PSIDE_BACK;
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}
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}
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}
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return side;
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}
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/*
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================
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SplitBrush
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Generates two new brushes, leaving the original
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unchanged
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================
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*/
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void SplitBrush (uBrush_t *brush, int planenum, uBrush_t **front, uBrush_t **back) {
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uBrush_t *b[2];
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int i, j;
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idWinding *w, *cw[2], *midwinding;
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side_t *s, *cs;
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float d, d_front, d_back;
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*front = *back = NULL;
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idPlane &plane = dmapGlobals.mapPlanes[planenum];
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// check all points
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d_front = d_back = 0;
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for ( i = 0; i < brush->numsides; i++ )
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{
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w = brush->sides[i].winding;
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if (!w) {
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continue;
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}
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for ( j = 0; j < w->GetNumPoints(); j++ ) {
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d = plane.Distance( (*w)[j].ToVec3() );
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if (d > 0 && d > d_front)
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d_front = d;
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if (d < 0 && d < d_back)
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d_back = d;
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}
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}
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if (d_front < 0.1) // PLANESIDE_EPSILON)
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{ // only on back
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*back = CopyBrush( brush );
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return;
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}
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if (d_back > -0.1) // PLANESIDE_EPSILON)
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{ // only on front
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*front = CopyBrush( brush );
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return;
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}
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// create a new winding from the split plane
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w = new idWinding( plane );
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for ( i = 0; i < brush->numsides && w; i++ ) {
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idPlane &plane2 = dmapGlobals.mapPlanes[brush->sides[i].planenum ^ 1];
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w = w->Clip( plane2, 0 ); // PLANESIDE_EPSILON);
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}
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if ( !w || w->IsTiny() ) {
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// the brush isn't really split
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int side;
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side = BrushMostlyOnSide( brush, plane );
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if (side == PSIDE_FRONT)
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*front = CopyBrush (brush);
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if (side == PSIDE_BACK)
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*back = CopyBrush (brush);
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return;
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}
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if ( w->IsHuge() ) {
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common->Printf ("WARNING: huge winding\n");
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}
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midwinding = w;
|
|
|
|
// split it for real
|
|
|
|
for ( i = 0; i < 2; i++ ) {
|
|
b[i] = AllocBrush (brush->numsides+1);
|
|
memcpy( b[i], brush, sizeof( uBrush_t ) - sizeof( brush->sides ) );
|
|
b[i]->numsides = 0;
|
|
b[i]->next = NULL;
|
|
b[i]->original = brush->original;
|
|
}
|
|
|
|
// split all the current windings
|
|
|
|
for ( i = 0; i < brush->numsides; i++ ) {
|
|
s = &brush->sides[i];
|
|
w = s->winding;
|
|
if (!w)
|
|
continue;
|
|
w->Split( plane, 0 /*PLANESIDE_EPSILON*/, &cw[0], &cw[1] );
|
|
for ( j = 0; j < 2; j++ ) {
|
|
if ( !cw[j] ) {
|
|
continue;
|
|
}
|
|
/*
|
|
if ( cw[j]->IsTiny() )
|
|
{
|
|
delete cw[j];
|
|
continue;
|
|
}
|
|
*/
|
|
cs = &b[j]->sides[b[j]->numsides];
|
|
b[j]->numsides++;
|
|
*cs = *s;
|
|
cs->winding = cw[j];
|
|
}
|
|
}
|
|
|
|
|
|
// see if we have valid polygons on both sides
|
|
|
|
for (i=0 ; i<2 ; i++)
|
|
{
|
|
if ( !BoundBrush (b[i]) ) {
|
|
break;
|
|
}
|
|
|
|
if ( b[i]->numsides < 3 )
|
|
{
|
|
FreeBrush (b[i]);
|
|
b[i] = NULL;
|
|
}
|
|
}
|
|
|
|
if ( !(b[0] && b[1]) )
|
|
{
|
|
if (!b[0] && !b[1])
|
|
common->Printf ("split removed brush\n");
|
|
else
|
|
common->Printf ("split not on both sides\n");
|
|
if (b[0])
|
|
{
|
|
FreeBrush (b[0]);
|
|
*front = CopyBrush (brush);
|
|
}
|
|
if (b[1])
|
|
{
|
|
FreeBrush (b[1]);
|
|
*back = CopyBrush (brush);
|
|
}
|
|
return;
|
|
}
|
|
|
|
// add the midwinding to both sides
|
|
for (i=0 ; i<2 ; i++)
|
|
{
|
|
cs = &b[i]->sides[b[i]->numsides];
|
|
b[i]->numsides++;
|
|
|
|
cs->planenum = planenum^i^1;
|
|
cs->material = NULL;
|
|
if (i==0)
|
|
cs->winding = midwinding->Copy();
|
|
else
|
|
cs->winding = midwinding;
|
|
}
|
|
|
|
{
|
|
float v1;
|
|
int i;
|
|
|
|
for (i=0 ; i<2 ; i++)
|
|
{
|
|
v1 = BrushVolume (b[i]);
|
|
if (v1 < 1.0)
|
|
{
|
|
FreeBrush (b[i]);
|
|
b[i] = NULL;
|
|
// common->Printf ("tiny volume after clip\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
*front = b[0];
|
|
*back = b[1];
|
|
}
|