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halflife-sdk-steam/utils/qbsp2/qbsp.c
2002-12-23 00:00:00 +00:00

1016 lines
20 KiB
C

/***
*
* Copyright (c) 1996-2002, Valve LLC. All rights reserved.
*
* This product contains software technology licensed from Id
* Software, Inc. ("Id Technology"). Id Technology (c) 1996 Id Software, Inc.
* All Rights Reserved.
*
****/
// qbsp.c
#include "bsp5.h"
//
// command line flags
//
qboolean drawflag;
qboolean nofill;
qboolean notjunc;
qboolean allverbose;
qboolean nogfx;
qboolean noclip;
qboolean leakonly;
qboolean watervis;
int subdivide_size = 240;
char bspfilename[1024];
char pointfilename[1024];
char portfilename[1024];
FILE *polyfiles[NUM_HULLS];
int hullnum;
//===========================================================================
/*
=================
BaseWindingForPlane
=================
*/
winding_t *BaseWindingForPlane (dplane_t *p)
{
int i, x;
vec_t max, v;
vec3_t org, vright, vup;
winding_t *w;
vec3_t temp;
#if 0
// find the major axis
max = -BOGUS_RANGE;
x = -1;
for (i=0 ; i<3; i++)
{
v = fabs(p->normal[i]);
if (v > max)
{
x = i;
max = v;
}
}
if (x==-1)
Error ("BaseWindingForPlane: no axis found");
VectorCopy (vec3_origin, vup);
switch (x)
{
case 0:
case 1:
vup[2] = 1;
break;
case 2:
vup[0] = 1;
break;
}
v = DotProduct (vup, p->normal);
VectorMA (vup, -v, p->normal, vup);
VectorNormalize (vup);
VectorScale (p->normal, p->dist, org);
CrossProduct (vup, p->normal, vright);
VectorScale (vup, 8192, vup);
VectorScale (vright, 8192, vright);
#else
VectorScale (p->normal, p->dist, org);
VectorCopy (vec3_origin, vup);
VectorCopy (vec3_origin, vright);
if (!p->normal[1] && !p->normal[2])
{
vup[2] = 8192;
vright[1] = 8192*p->normal[0];
}
else if (!p->normal[0] && !p->normal[2])
{
vup[2] = 8192;
vright[0] = -8192*p->normal[1];
}
else if (!p->normal[0] && !p->normal[1])
{
vup[1] = 8192;
vright[0] = 8192*p->normal[2];
}
else
{
vup[0] = -2*p->normal[1]*p->normal[2];
vup[1] = p->normal[0]*p->normal[2];
vup[2] = p->normal[0]*p->normal[1];
VectorNormalize (vup);
VectorCopy (p->normal, temp); // to vec3_t
CrossProduct (vup, temp, vright);
VectorScale (vup, 8192, vup);
VectorScale (vright, 8192, vright);
}
#endif
// project a really big axis aligned box onto the plane
w = NewWinding (4);
VectorSubtract (org, vright, w->points[0]);
VectorAdd (w->points[0], vup, w->points[0]);
VectorAdd (org, vright, w->points[1]);
VectorAdd (w->points[1], vup, w->points[1]);
VectorAdd (org, vright, w->points[2]);
VectorSubtract (w->points[2], vup, w->points[2]);
VectorSubtract (org, vright, w->points[3]);
VectorSubtract (w->points[3], vup, w->points[3]);
w->numpoints = 4;
return w;
}
/*
==================
CopyWinding
==================
*/
winding_t *CopyWinding (winding_t *w)
{
int size;
winding_t *c;
size = (int)((winding_t *)0)->points[w->numpoints];
c = malloc (size);
memcpy (c, w, size);
return c;
}
/*
==================
ClipWinding
Clips the winding to the plane, returning the new winding on the positive side
Frees the input winding.
If keepon is true, an exactly on-plane winding will be saved, otherwise
it will be clipped away.
==================
*/
winding_t *ClipWinding (winding_t *in, dplane_t *split, qboolean keepon)
{
vec_t dists[MAX_POINTS_ON_WINDING];
int sides[MAX_POINTS_ON_WINDING];
int counts[3];
vec_t dot;
int i, j;
vec_t *p1, *p2;
vec3_t mid;
winding_t *neww;
int maxpts;
counts[0] = counts[1] = counts[2] = 0;
// determine sides for each point
// do this exactly, with no epsilon so tiny portals still work
for (i=0 ; i<in->numpoints ; i++)
{
dot = DotProduct (in->points[i], split->normal);
dot -= split->dist;
dists[i] = dot;
if (dot > 0)
sides[i] = SIDE_FRONT;
else if (dot < 0)
sides[i] = SIDE_BACK;
else
sides[i] = SIDE_ON;
counts[sides[i]]++;
}
sides[i] = sides[0];
dists[i] = dists[0];
if (keepon && !counts[0] && !counts[1])
return in;
if (!counts[0])
{
FreeWinding (in);
return NULL;
}
if (!counts[1])
return in;
maxpts = in->numpoints+4; // can't use counts[0]+2 because
// of fp grouping errors
neww = NewWinding (maxpts);
for (i=0 ; i<in->numpoints ; i++)
{
p1 = in->points[i];
if (sides[i] == SIDE_ON)
{
VectorCopy (p1, neww->points[neww->numpoints]);
neww->numpoints++;
continue;
}
if (sides[i] == SIDE_FRONT)
{
VectorCopy (p1, neww->points[neww->numpoints]);
neww->numpoints++;
}
if (sides[i+1] == SIDE_ON || sides[i+1] == sides[i])
continue;
// generate a split point
p2 = in->points[(i+1)%in->numpoints];
dot = dists[i] / (dists[i]-dists[i+1]);
for (j=0 ; j<3 ; j++)
{ // avoid round off error when possible
if (split->normal[j] == 1)
mid[j] = split->dist;
else if (split->normal[j] == -1)
mid[j] = -split->dist;
else
mid[j] = p1[j] + dot*(p2[j]-p1[j]);
}
VectorCopy (mid, neww->points[neww->numpoints]);
neww->numpoints++;
}
if (neww->numpoints > maxpts)
Error ("ClipWinding: points exceeded estimate");
// free the original winding
FreeWinding (in);
return neww;
}
/*
==================
DivideWinding
Divides a winding by a plane, producing one or two windings. The
original winding is not damaged or freed. If only on one side, the
returned winding will be the input winding. If on both sides, two
new windings will be created.
==================
*/
//#define DIVIDE_EPSILON 0.5
#define DIVIDE_EPSILON ON_EPSILON
void DivideWinding (winding_t *in, dplane_t *split, winding_t **front, winding_t **back)
{
vec_t dists[MAX_POINTS_ON_WINDING];
int sides[MAX_POINTS_ON_WINDING];
int counts[3];
vec_t dot;
int i, j;
vec_t *p1, *p2;
vec3_t mid;
winding_t *f, *b;
int maxpts;
counts[0] = counts[1] = counts[2] = 0;
// determine sides for each point
for (i=0 ; i<in->numpoints ; i++)
{
dot = DotProduct (in->points[i], split->normal);
dot -= split->dist;
dists[i] = dot;
if (dot > DIVIDE_EPSILON)
sides[i] = SIDE_FRONT;
else if (dot < -DIVIDE_EPSILON)
sides[i] = SIDE_BACK;
else
{
sides[i] = SIDE_ON;
}
counts[sides[i]]++;
}
sides[i] = sides[0];
dists[i] = dists[0];
*front = *back = NULL;
if (!counts[0])
{
*back = in;
return;
}
if (!counts[1])
{
*front = in;
return;
}
maxpts = in->numpoints+4; // can't use counts[0]+2 because
// of fp grouping errors
*front = f = NewWinding (maxpts);
*back = b = NewWinding (maxpts);
for (i=0 ; i<in->numpoints ; i++)
{
p1 = in->points[i];
if (sides[i] == SIDE_ON)
{
VectorCopy (p1, f->points[f->numpoints]);
f->numpoints++;
VectorCopy (p1, b->points[b->numpoints]);
b->numpoints++;
continue;
}
if (sides[i] == SIDE_FRONT)
{
VectorCopy (p1, f->points[f->numpoints]);
f->numpoints++;
}
if (sides[i] == SIDE_BACK)
{
VectorCopy (p1, b->points[b->numpoints]);
b->numpoints++;
}
if (sides[i+1] == SIDE_ON || sides[i+1] == sides[i])
continue;
// generate a split point
p2 = in->points[(i+1)%in->numpoints];
dot = dists[i] / (dists[i]-dists[i+1]);
for (j=0 ; j<3 ; j++)
{ // avoid round off error when possible
if (split->normal[j] == 1)
mid[j] = split->dist;
else if (split->normal[j] == -1)
mid[j] = -split->dist;
else
mid[j] = p1[j] + dot*(p2[j]-p1[j]);
}
VectorCopy (mid, f->points[f->numpoints]);
f->numpoints++;
VectorCopy (mid, b->points[b->numpoints]);
b->numpoints++;
}
if (f->numpoints > maxpts || b->numpoints > maxpts)
Error ("ClipWinding: points exceeded estimate");
}
//===========================================================================
/*
==================
NewFaceFromFace
Duplicates the non point information of a face, used by SplitFace and
MergeFace.
==================
*/
face_t *NewFaceFromFace (face_t *in)
{
face_t *newf;
newf = AllocFace ();
newf->planenum = in->planenum;
newf->texturenum = in->texturenum;
newf->original = in->original;
newf->contents = in->contents;
return newf;
}
void SplitFaceTmp( face_t *in, dplane_t *split, face_t **front, face_t **back )
{
vec_t dists[MAXEDGES+1];
int sides[MAXEDGES+1];
int counts[3];
vec_t dot;
int i, j;
face_t *newf, *new2;
vec_t *p1, *p2;
vec3_t mid;
if (in->numpoints < 0)
Error ("SplitFace: freed face");
counts[0] = counts[1] = counts[2] = 0;
// determine sides for each point
for (i=0 ; i<in->numpoints ; i++)
{
dot = DotProduct (in->pts[i], split->normal);
dot -= split->dist;
dists[i] = dot;
if (dot > ON_EPSILON)
sides[i] = SIDE_FRONT;
else if (dot < -ON_EPSILON)
sides[i] = SIDE_BACK;
else
sides[i] = SIDE_ON;
counts[sides[i]]++;
}
sides[i] = sides[0];
dists[i] = dists[0];
if (!counts[0])
{
*front = NULL;
*back = in;
return;
}
if (!counts[1])
{
*front = in;
*back = NULL;
return;
}
*back = newf = NewFaceFromFace (in);
*front = new2 = NewFaceFromFace (in);
// distribute the points and generate splits
for (i=0 ; i<in->numpoints ; i++)
{
if (newf->numpoints > MAXEDGES || new2->numpoints > MAXEDGES)
Error ("SplitFace: numpoints > MAXEDGES");
p1 = in->pts[i];
if (sides[i] == SIDE_ON)
{
VectorCopy (p1, newf->pts[newf->numpoints]);
newf->numpoints++;
VectorCopy (p1, new2->pts[new2->numpoints]);
new2->numpoints++;
continue;
}
if (sides[i] == SIDE_FRONT)
{
VectorCopy (p1, new2->pts[new2->numpoints]);
new2->numpoints++;
}
else
{
VectorCopy (p1, newf->pts[newf->numpoints]);
newf->numpoints++;
}
if (sides[i+1] == SIDE_ON || sides[i+1] == sides[i])
continue;
// generate a split point
p2 = in->pts[(i+1)%in->numpoints];
dot = dists[i] / (dists[i]-dists[i+1]);
for (j=0 ; j<3 ; j++)
{ // avoid round off error when possible
if (split->normal[j] == 1)
mid[j] = split->dist;
else if (split->normal[j] == -1)
mid[j] = -split->dist;
else
mid[j] = p1[j] + dot*(p2[j]-p1[j]);
}
VectorCopy (mid, newf->pts[newf->numpoints]);
newf->numpoints++;
VectorCopy (mid, new2->pts[new2->numpoints]);
new2->numpoints++;
}
if (newf->numpoints > MAXEDGES || new2->numpoints > MAXEDGES)
Error ("SplitFace: numpoints > MAXEDGES");
#if 0
CheckFace (newf);
CheckFace (new2);
#endif
}
/*
==================
SplitFace
==================
*/
void SplitFace (face_t *in, dplane_t *split, face_t **front, face_t **back)
{
SplitFaceTmp( in, split, front, back );
// free the original face now that is is represented by the fragments
if ( *front && *back )
FreeFace (in);
}
//===========================================================================
int c_activefaces, c_peakfaces;
int c_activesurfaces, c_peaksurfaces;
int c_activewindings, c_peakwindings;
int c_activeportals, c_peakportals;
void PrintMemory (void)
{
printf ("faces : %6i (%6i)\n", c_activefaces, c_peakfaces);
printf ("surfaces: %6i (%6i)\n", c_activesurfaces, c_peaksurfaces);
printf ("windings: %6i (%6i)\n", c_activewindings, c_peakwindings);
printf ("portals : %6i (%6i)\n", c_activeportals, c_peakportals);
}
/*
==================
NewWinding
==================
*/
winding_t *NewWinding (int points)
{
winding_t *w;
int size;
if (points > MAX_POINTS_ON_WINDING)
Error ("NewWinding: %i points", points);
c_activewindings++;
if (c_activewindings > c_peakwindings)
c_peakwindings = c_activewindings;
size = (int)((winding_t *)0)->points[points];
w = malloc (size);
memset (w, 0, size);
return w;
}
void FreeWinding (winding_t *w)
{
c_activewindings--;
free (w);
}
/*
===========
AllocFace
===========
*/
face_t *AllocFace (void)
{
face_t *f;
c_activefaces++;
if (c_activefaces > c_peakfaces)
c_peakfaces = c_activefaces;
f = malloc (sizeof(face_t));
memset (f, 0, sizeof(face_t));
f->planenum = -1;
return f;
}
void FreeFace (face_t *f)
{
c_activefaces--;
free (f);
}
/*
===========
AllocSurface
===========
*/
surface_t *AllocSurface (void)
{
surface_t *s;
s = malloc (sizeof(surface_t));
memset (s, 0, sizeof(surface_t));
c_activesurfaces++;
if (c_activesurfaces > c_peaksurfaces)
c_peaksurfaces = c_activesurfaces;
return s;
}
void FreeSurface (surface_t *s)
{
c_activesurfaces--;
free (s);
}
/*
===========
AllocPortal
===========
*/
portal_t *AllocPortal (void)
{
portal_t *p;
c_activeportals++;
if (c_activeportals > c_peakportals)
c_peakportals = c_activeportals;
p = malloc (sizeof(portal_t));
memset (p, 0, sizeof(portal_t));
return p;
}
void FreePortal (portal_t *p)
{
c_activeportals--;
free (p);
}
/*
===========
AllocNode
===========
*/
node_t *AllocNode (void)
{
node_t *n;
n = malloc (sizeof(node_t));
memset (n, 0, sizeof(node_t));
return n;
}
//===========================================================================
face_t *validfaces[MAX_MAP_PLANES];
void AddFaceToBounds (face_t *f, vec3_t mins, vec3_t maxs)
{
int i;
for (i=0 ; i<f->numpoints ; i++)
AddPointToBounds (f->pts[i], mins, maxs);
}
/*
===============
SurflistFromValidFaces
===============
*/
surfchain_t *SurflistFromValidFaces (void)
{
surface_t *n;
int i;
face_t *f, *next;
surfchain_t *sc;
sc = malloc(sizeof(*sc));
ClearBounds (sc->mins, sc->maxs);
sc->surfaces = NULL;
// grab planes from both sides
for (i=0 ; i<numplanes ; i+=2)
{
if (!validfaces[i] && !validfaces[i+1])
continue;
n = AllocSurface ();
n->next = sc->surfaces;
sc->surfaces = n;
ClearBounds (n->mins, n->maxs);
n->planenum = i;
n->faces = NULL;
for (f = validfaces[i] ; f ; f=next)
{
next = f->next;
f->next = n->faces;
n->faces = f;
AddFaceToBounds (f, n->mins, n->maxs);
}
for (f = validfaces[i+1] ; f ; f=next)
{
next = f->next;
f->next = n->faces;
n->faces = f;
AddFaceToBounds (f, n->mins, n->maxs);
}
AddPointToBounds (n->mins, sc->mins, sc->maxs);
AddPointToBounds (n->maxs, sc->mins, sc->maxs);
validfaces[i] = NULL;
validfaces[i+1] = NULL;
}
// merge all possible polygons
MergeAll (sc->surfaces);
return sc;
}
/*
===============
ReadSurfs
===============
*/
surfchain_t *ReadSurfs (FILE *file)
{
int nump;
int r;
int planenum, texinfo, contents, numpoints;
face_t *f;
int i;
double v[3];
// read in the polygons
while (1)
{
r = fscanf (file, "%i %i %i %i\n", &planenum, &texinfo, &contents, &numpoints);
if (r == 0 || r == -1)
return NULL;
if (planenum == -1) // end of model
break;
if (r != 4)
Error ("ReadSurfs: scanf failure");
if (numpoints > MAXPOINTS)
Error ("ReadSurfs: %i > MAXPOINTS", numpoints);
if (planenum > numplanes)
Error ("ReadSurfs: %i > numplanes", planenum);
if (texinfo > numtexinfo)
Error ("ReadSurfs: %i > numtexinfo", texinfo);
f = AllocFace ();
f->planenum = planenum;
f->texturenum = texinfo;
f->contents = contents;
f->numpoints = numpoints;
f->next = validfaces[planenum];
validfaces[planenum] = f;
for (i=0 ; i<f->numpoints ; i++)
{
r = fscanf (file, "%lf %lf %lf\n", &v[0], &v[1], &v[2]);
VectorCopy (v, f->pts[i]);
}
fscanf (file, "\n");
}
return SurflistFromValidFaces ();
}
/*
===============
ProcessModel
===============
*/
qboolean ProcessModel (void)
{
char mod[80];
surfchain_t *surfs;
node_t *nodes;
dmodel_t *model;
int i;
int startleafs;
surfs = ReadSurfs (polyfiles[0]);
if (!surfs)
return false; // all models are done
VectorCopy (surfs->mins, draw_mins);
VectorCopy (surfs->maxs, draw_maxs);
if (nummodels >= MAX_MAP_MODELS)
Error ("nummodels == MAX_MAP_MODELS");
startleafs = numleafs;
model = &dmodels[nummodels];
nummodels++;
VectorCopy (surfs->mins, model->mins);
VectorCopy (surfs->maxs, model->maxs);
//
// SolidBSP generates a node tree
//
nodes = SolidBSP (surfs);
//
// build all the portals in the bsp tree
// some portals are solid polygons, and some are paths to other leafs
//
if (nummodels == 1 && !nofill) // assume non-world bmodels are simple
nodes = FillOutside (nodes, true); // make a leakfile if bad
FreePortals (nodes);
// fix tjunctions
tjunc (nodes);
MakeFaceEdges (nodes);
// emit the faces for the bsp file
model->headnode[0] = numnodes;
model->firstface = numfaces;
WriteDrawNodes (nodes);
model->numfaces = numfaces - model->firstface;;
model->visleafs = numleafs - startleafs;
if (noclip)
return true;
//
// the clipping hulls are simpler
//
for (hullnum = 1 ; hullnum < NUM_HULLS ; hullnum++)
{
surfs = ReadSurfs (polyfiles[hullnum]);
nodes = SolidBSP (surfs);
if (nummodels == 1 && !nofill) // assume non-world bmodels are simple
nodes = FillOutside (nodes, false);
FreePortals (nodes);
model->headnode[hullnum] = numclipnodes;
WriteClipNodes (nodes);
}
return true;
}
/*
=================
ProcessFile
=================
*/
void ProcessFile (char *bspfilename)
{
int i;
char name[1024];
// create filenames
sprintf (portfilename, "%s.prt", bspfilename);
remove (portfilename);
sprintf (pointfilename, "%s.pts", bspfilename);
remove (pointfilename);
// open the polygon files
for (i=0 ; i<NUM_HULLS ; i++)
{
sprintf (name, "%s.p%i", bspfilename, i);
polyfiles[i] = fopen (name, "r");
if (!polyfiles[i])
Error ("Can't open %s", name);
}
// load the output of qcsg
strcat (bspfilename, ".bsp");
LoadBSPFile (bspfilename);
ParseEntities ();
// init the tables to be shared by all models
BeginBSPFile ();
// process each model individually
while (ProcessModel ())
;
// write the updated bsp file out
FinishBSPFile ();
}
/*
==================
main
==================
*/
extern char qproject[];
int main (int argc, char **argv)
{
int i;
double start, end;
printf( "qbsp2.exe v2.2 (%s)\n", __DATE__ );
printf ("---- qbsp2 ----\n" );
//
// check command line flags
//
for (i=1 ; i<argc ; i++)
{
if (argv[i][0] != '-')
break;
if (!strcmp(argv[i],"-threads"))
{
numthreads = atoi (argv[i+1]);
i++;
}
else if (!strcmp(argv[i], "-v"))
{
printf ("verbose = true\n");
verbose = true;
}
else if (!strcmp (argv[i],"-notjunc"))
notjunc = true;
else if (!strcmp (argv[i],"-draw"))
drawflag = true;
else if (!strcmp (argv[i],"-watervis"))
watervis = true;
else if (!strcmp (argv[i],"-noclip"))
noclip = true;
else if (!strcmp (argv[i],"-nofill"))
nofill = true;
else if (!strcmp (argv[i],"-verbose"))
allverbose = true;
else if (!strcmp (argv[i],"-leakonly"))
leakonly = true;
else if (!strcmp (argv[i],"-nogfx"))
nogfx = true;
else if( !strcmp( argv[ i ], "-proj" ) )
{
strcpy( qproject, argv[ i + 1 ] );
i++;
}
else if (!strcmp (argv[i],"-subdivide"))
{
subdivide_size = atoi(argv[i+1]);
i++;
}
else
Error ("qbsp: Unknown option '%s'", argv[i]);
}
if (i != argc - 2 && i != argc - 1)
Error ("usage: qbsp [-draw] [-leakonly] [-noclip] [-nofill] [-nogfx] [-notjunc] [-proj name] [-subdivide size] [-threads n] [-v] [-watervis] sourcefile");
ThreadSetDefault ();
SetQdirFromPath (argv[i]);
strcpy (bspfilename, ExpandArg(argv[i]));
StripExtension (bspfilename);
//
// do it!
//
start = I_FloatTime ();
ProcessFile (bspfilename);
end = I_FloatTime ();
printf ("%5.0f seconds elapsed\n", end-start);
return 0;
}