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

879 lines
17 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.
*
****/
// csg4.c
#include "csg.h"
/*
NOTES
-----
check map size for +/- 4k limit at load time
*/
int brushfaces;
int c_csgfaces;
FILE *out[NUM_HULLS];
int c_tiny, c_tiny_clip;
int c_outfaces;
qboolean hullfile = false;
static char qhullfile[ 256 ];
qboolean glview;
qboolean noclip;
qboolean onlyents;
qboolean wadtextures = true;
vec3_t world_mins, world_maxs;
/*
==================
NewFaceFromFace
Duplicates the non point information of a face, used by SplitFace
==================
*/
bface_t *NewFaceFromFace (bface_t *in)
{
bface_t *newf;
newf = malloc (sizeof(bface_t));
memset (newf, 0, sizeof(newf));
newf->contents = in->contents;
newf->texinfo = in->texinfo;
newf->planenum = in->planenum;
newf->plane = in->plane;
return newf;
}
void FreeFace (bface_t *f)
{
free (f->w);
free (f);
}
/*
=================
ClipFace
Clips a faces by a plane, returning the fragment on the backside
and adding any fragment to the outside.
Faces exactly on the plane will stay inside unless overdrawn by later brush
frontside is the side of the plane that holds the outside list
Precedence is necesary to handle overlapping coplanar faces.
=================
*/
#define SPLIT_EPSILON 0.3
bface_t *ClipFace (brush_t *b, bface_t *f, bface_t **outside,
int splitplane, qboolean precedence)
{
bface_t *front;
winding_t *fw, *bw;
vec_t d;
plane_t *split;
int i, count[3];
// handle exact plane matches special
if (f->planenum == (splitplane^1) )
{ // opposite side, so put on inside list
return f;
}
if ( f->planenum == splitplane )
{
// coplanar
if (precedence)
{ // this fragment will go to the inside, because
// the earlier one was clipped to the outside
return f;
}
f->next = *outside;
*outside = f;
return NULL;
}
split = &mapplanes[splitplane];
#if 0
count[0] = count[1] = count[2] = 0;
for (i=0 ; i<f->w->numpoints ; i++)
{
d = DotProduct (f->w->p[i], split->normal) - split->dist;
if (d < -SPLIT_EPSILON)
count[1]++;
else if (d > SPLIT_EPSILON)
count[0]++;
else
count[2]++;
}
if (!count[0])
{
fw = NULL;
bw = f->w;
}
else if (!count[1])
{
fw = f->w;
bw = NULL;
}
else
#endif
ClipWindingNoCopy (f->w, split->normal, split->dist, &fw, &bw);
if (!fw)
return f;
if (!bw)
{
f->next = *outside;
*outside = f;
return NULL;
}
FreeWinding (f->w);
front = NewFaceFromFace (f);
front->w = fw;
WindingBounds (fw, front->mins, front->maxs);
front->next = *outside;
*outside = front;
f->w = bw;
WindingBounds (bw, f->mins, f->maxs);
return f;
}
/*
===========
WriteFace
===========
*/
void WriteFace (int hull, bface_t *f)
{
int i, j;
winding_t *w;
static int level = 128;
vec_t light;
ThreadLock ();
if (!hull)
c_csgfaces++;
if (glview)
{
// .gl format
w = f->w;
fprintf (out[hull], "%i\n", w->numpoints);
level+=28;
light = (level&255)/255.0;
for (i=0 ; i<w->numpoints ; i++)
{
fprintf (out[hull], "%5.2f %5.2f %5.2f %5.3f %5.3f %5.3f\n",
w->p[i][0],
w->p[i][1],
w->p[i][2],
light,
light,
light);
}
fprintf (out[hull], "\n");
}
else
{
// .p0 format
w = f->w;
fprintf (out[hull], "%i %i %i %i\n", f->planenum, f->texinfo, f->contents, w->numpoints);
for (i=0 ; i<w->numpoints ; i++)
{
fprintf (out[hull], "%5.2f %5.2f %5.2f\n",
w->p[i][0],
w->p[i][1],
w->p[i][2]);
}
fprintf (out[hull], "\n");
}
ThreadUnlock ();
}
/*
==================
SaveOutside
The faces remaining on the outside list are final
polygons. Write them to the output file.
Passable contents (water, lava, etc) will generate
a mirrored copy of the face to be seen from the inside.
==================
*/
void SaveOutside (brush_t *b, int hull, bface_t *outside, int mirrorcontents)
{
bface_t *f , *next, *f2;
int i;
int planenum;
vec3_t temp;
for (f=outside ; f ; f=next)
{
next = f->next;
if (WindingArea (f->w) < 1.0)
{
c_tiny++;
qprintf ("Entity %i, Brush %i: tiny fragment\n"
, b->entitynum, b->brushnum);
continue;
}
// count unique faces
if (!hull)
{
for (f2=b->hulls[hull].faces ; f2 ; f2=f2->next)
{
if (f2->planenum == f->planenum)
{
if (!f2->used)
{
f2->used = true;
c_outfaces++;
}
break;
}
}
}
WriteFace (hull, f);
// if (mirrorcontents != CONTENTS_SOLID)
{
f->planenum ^= 1;
f->plane = &mapplanes[f->planenum];
f->contents = mirrorcontents;
// swap point orders
for (i=0 ; i<f->w->numpoints/2 ; i++) // add points backwards
{
VectorCopy (f->w->p[i], temp);
VectorCopy (f->w->p[f->w->numpoints-1-i]
, f->w->p[i]);
VectorCopy (temp, f->w->p[f->w->numpoints-1-i]);
}
WriteFace (hull, f);
}
FreeFace (f);
}
}
/*
==================
EncloseInside
Changes the contents on all faces that got clipped out
and moves them back to the outside list
==================
*/
void EncloseInside (bface_t *inside, bface_t **outside
, int contents)
{
bface_t *f, *next;
for (f=inside ; f ; f=next)
{
next = f->next;
f->contents = contents;
f->next = *outside;
*outside = f;
}
}
//==========================================================================
bface_t *CopyFace (bface_t *f)
{
bface_t *n;
n = NewFaceFromFace (f);
n->w = CopyWinding (f->w);
VectorCopy (f->mins, n->mins);
VectorCopy (f->maxs, n->maxs);
return n;
}
/*
==================
CopyFacesToOutside
Make a copy of all the faces of the brush, so they
can be chewed up by other brushes.
All of the faces start on the outside list.
As other brushes take bites out of the faces, the
fragments are moved to the inside list, so they
can be freed when they are determined to be
completely enclosed in solid.
==================
*/
bface_t *CopyFacesToOutside (brushhull_t *bh)
{
bface_t *f, *newf;
bface_t *outside;
outside = NULL;
for (f=bh->faces ; f ; f=f->next)
{
brushfaces++;
newf = CopyFace (f);
WindingBounds (newf->w, newf->mins, newf->maxs);
newf->next = outside;
outside = newf;
}
return outside;
}
//============================================================
/*
===========
CSGBrush
===========
*/
void CSGBrush (int brushnum)
{
int hull;
brush_t *b1, *b2;
brushhull_t *bh1, *bh2;
int bn;
qboolean overwrite;
int i;
bface_t *f, *f2, *next, *fcopy;
bface_t *outside, *oldoutside;
entity_t *e;
vec_t area;
SetThreadPriority(GetCurrentThread(),THREAD_PRIORITY_ABOVE_NORMAL);
b1 = &mapbrushes[brushnum];
e = &entities[b1->entitynum];
for (hull = 0 ; hull<NUM_HULLS ; hull++)
{
bh1 = &b1->hulls[hull];
// set outside to a copy of the brush's faces
outside = CopyFacesToOutside (bh1);
overwrite = false;
for (bn=0 ; bn<e->numbrushes ; bn++)
{
// see if b2 needs to clip a chunk out of b1
if (bn==brushnum)
{
overwrite = true; // later brushes now overwrite
continue;
}
b2 = &mapbrushes[e->firstbrush + bn];
bh2 = &b2->hulls[hull];
if (!bh2->faces)
continue; // brush isn't in this hull
// check brush bounding box first
for (i=0 ; i<3 ; i++)
if (bh1->mins[i] > bh2->maxs[i]
|| bh1->maxs[i] < bh2->mins[i])
break;
if (i<3)
continue;
// divide faces by the planes of the b2 to find which
// fragments are inside
f = outside;
outside = NULL;
for ( ; f ; f=next)
{
next = f->next;
// check face bounding box first
for (i=0 ; i<3 ; i++)
if (bh2->mins[i] > f->maxs[i]
|| bh2->maxs[i] < f->mins[i])
break;
if (i<3)
{ // this face doesn't intersect brush2's bbox
f->next = outside;
outside = f;
continue;
}
oldoutside = outside;
fcopy = CopyFace (f); // save to avoid fake splits
// throw pieces on the front sides of the planes
// into the outside list, return the remains on the inside
for (f2=bh2->faces ; f2 && f ; f2=f2->next)
f = ClipFace (b1, f, &outside, f2->planenum, overwrite);
area = f ? WindingArea (f->w) : 0;
if (f && area < 1.0)
{
qprintf ("Entity %i, Brush %i: tiny penetration\n"
, b1->entitynum, b1->brushnum);
c_tiny_clip++;
FreeFace (f);
f = NULL;
}
if (f)
{
// there is one convex fragment of the original
// face left inside brush2
FreeFace (fcopy);
if (b1->contents > b2->contents)
{ // inside a water brush
f->contents = b2->contents;
f->next = outside;
outside = f;
}
else // inside a solid brush
FreeFace (f); // throw it away
}
else
{ // the entire thing was on the outside, even
// though the bounding boxes intersected,
// which will never happen with axial planes
// free the fragments chopped to the outside
while (outside != oldoutside)
{
f2 = outside->next;
FreeFace (outside);
outside = f2;
}
// revert to the original face to avoid
// unneeded false cuts
fcopy->next = outside;
outside = fcopy;
}
}
}
// all of the faces left in outside are real surface faces
SaveOutside (b1, hull, outside, b1->contents);
}
}
//======================================================================
/*
============
EmitPlanes
============
*/
void EmitPlanes (void)
{
int i;
dplane_t *dp;
plane_t *mp;
numplanes = nummapplanes;
mp = mapplanes;
dp = dplanes;
for (i=0 ; i<nummapplanes ; i++, mp++, dp++)
{
VectorCopy ( mp->normal, dp->normal);
dp->dist = mp->dist;
dp->type = mp->type;
}
}
/*
============
SetModelNumbers
============
*/
void SetModelNumbers (void)
{
int i;
int models;
char value[10];
models = 1;
for (i=1 ; i<num_entities ; i++)
{
if (entities[i].numbrushes)
{
sprintf (value, "*%i", models);
models++;
SetKeyValue (&entities[i], "model", value);
}
}
}
/*
============
SetLightStyles
============
*/
#define MAX_SWITCHED_LIGHTS 32
void SetLightStyles (void)
{
int stylenum;
char *t;
entity_t *e;
int i, j;
char value[10];
char lighttargets[MAX_SWITCHED_LIGHTS][64];
// any light that is controlled (has a targetname)
// must have a unique style number generated for it
stylenum = 0;
for (i=1 ; i<num_entities ; i++)
{
e = &entities[i];
t = ValueForKey (e, "classname");
if (Q_strncasecmp (t, "light", 5))
continue;
t = ValueForKey (e, "targetname");
if (!t[0])
continue;
// find this targetname
for (j=0 ; j<stylenum ; j++)
if (!strcmp (lighttargets[j], t))
break;
if (j == stylenum)
{
if (stylenum == MAX_SWITCHED_LIGHTS)
Error ("stylenum == MAX_SWITCHED_LIGHTS");
strcpy (lighttargets[j], t);
stylenum++;
}
sprintf (value, "%i", 32 + j);
SetKeyValue (e, "style", value);
}
}
/*
============
WriteBSP
============
*/
void WriteBSP (char *name)
{
char path[1024];
strcpy (path, name);
DefaultExtension (path, ".bsp");
SetModelNumbers ();
SetLightStyles ();
UnparseEntities ();
if ( !onlyents )
WriteMiptex ();
WriteBSPFile (path);
}
//======================================================================
/*
============
ProcessModels
============
*/
int typecontents[4] = {CONTENTS_WATER, CONTENTS_SLIME, CONTENTS_LAVA
, CONTENTS_SKY};
void ProcessModels (void)
{
int i, j, type;
int placed;
int first, contents;
brush_t temp;
vec3_t origin;
for (i=0 ; i<num_entities ; i++)
{
if (!entities[i].numbrushes)
continue;
//
// sort the contents down so stone bites water, etc
//
first = entities[i].firstbrush;
placed = 0;
for (type=0 ; type<4 ; type++)
{
contents = typecontents[type];
for (j=placed+1 ; j< entities[i].numbrushes ; j++)
{
if (mapbrushes[first+j].contents == contents)
{
temp = mapbrushes[first+placed];
mapbrushes[first+placed] = mapbrushes[j];
mapbrushes[j] = temp;
placed++;
}
}
}
//
// csg them in order
//
if (i == 0)
{
RunThreadsOnIndividual (entities[i].numbrushes, 1 , CSGBrush);
}
else
{
for (j=0 ; j<entities[i].numbrushes ; j++)
CSGBrush (first + j);
}
// write end of model marker
if (!glview)
{
for (j=0 ; j<NUM_HULLS ; j++)
fprintf (out[j], "-1 -1 -1 -1\n");
}
}
}
//=========================================
/*
============
BoundWorld
============
*/
void BoundWorld (void)
{
int i;
brushhull_t *h;
ClearBounds (world_mins, world_maxs);
for (i=0 ; i<nummapbrushes ; i++)
{
h = &mapbrushes[i].hulls[0];
if (!h->faces)
continue;
AddPointToBounds (h->mins, world_mins, world_maxs);
AddPointToBounds (h->maxs, world_mins, world_maxs);
}
qprintf ("World bounds: (%i %i %i) to (%i %i %i)\n",
(int)world_mins[0],(int)world_mins[1],(int)world_mins[2],
(int)world_maxs[0],(int)world_maxs[1],(int)world_maxs[2]);
VectorCopy (world_mins, draw_mins);
VectorCopy (world_maxs, draw_maxs);
Draw_ClearWindow ();
}
/*
============
main
============
*/
extern char qproject[];
int main (int argc, char **argv)
{
int i, j;
int hull;
entity_t *ent;
char source[1024];
char name[1024];
double start, end;
printf( "qcsg.exe v2.8 (%s)\n", __DATE__ );
printf ("---- qcsg ----\n" );
for (i=1 ; i<argc ; i++)
{
if (!strcmp(argv[i],"-threads"))
{
numthreads = atoi (argv[i+1]);
i++;
}
else if (!strcmp(argv[i],"-glview"))
{
glview = true;
}
else if (!strcmp(argv[i], "-v"))
{
printf ("verbose = true\n");
verbose = true;
}
else if (!strcmp(argv[i], "-draw"))
{
printf ("drawflag = true\n");
drawflag = true;
}
else if (!strcmp(argv[i], "-noclip"))
{
printf ("noclip = true\n");
noclip = true;
}
else if (!strcmp(argv[i], "-onlyents"))
{
printf ("onlyents = true\n");
onlyents = true;
}
else if (!strcmp(argv[i], "-nowadtextures"))
{
printf ("wadtextures = false\n");
wadtextures = false;
}
else if (!strcmp(argv[i], "-wadinclude"))
{
pszWadInclude[nWadInclude++] = strdup( argv[i + 1] );
i++;
}
else if( !strcmp( argv[ i ], "-proj" ) )
{
strcpy( qproject, argv[ i + 1 ] );
i++;
}
else if (!strcmp(argv[i], "-hullfile"))
{
hullfile = true;
strcpy( qhullfile, argv[i + 1] );
i++;
}
else if (argv[i][0] == '-')
Error ("Unknown option \"%s\"", argv[i]);
else
break;
}
if (i != argc - 1)
Error ("usage: qcsg [-nowadtextures] [-wadinclude <name>] [-draw] [-glview] [-noclip] [-onlyents] [-proj <name>] [-threads #] [-v] [-hullfile <name>] mapfile");
SetThreadPriority(GetCurrentThread(),THREAD_PRIORITY_ABOVE_NORMAL);
start = I_FloatTime ();
CheckHullFile( hullfile, qhullfile );
ThreadSetDefault ();
SetQdirFromPath (argv[i]);
strcpy (source, ExpandArg (argv[i]));
COM_FixSlashes(source);
StripExtension (source);
strcpy (name, ExpandArg (argv[i]));
DefaultExtension (name, ".map"); // might be .reg
//
// if onlyents, just grab the entites and resave
//
if (onlyents && !glview)
{
char out[1024];
int old_entities;
sprintf (out, "%s.bsp", source);
LoadBSPFile (out);
// Get the new entity data from the map file
LoadMapFile (name);
// Write it all back out again.
WriteBSP (source);
end = I_FloatTime ();
printf ("%5.0f seconds elapsed\n", end-start);
return 0;
}
//
// start from scratch
//
LoadMapFile (name);
RunThreadsOnIndividual (nummapbrushes, true, CreateBrush);
BoundWorld ();
qprintf ("%5i map planes\n", nummapplanes);
for (i=0 ; i<NUM_HULLS ; i++)
{
char name[1024];
if (glview)
sprintf (name, "%s.gl%i",source, i);
else
sprintf (name, "%s.p%i",source, i);
out[i] = fopen (name, "w");
if (!out[i])
Error ("Couldn't open %s",name);
}
ProcessModels ();
qprintf ("%5i csg faces\n", c_csgfaces);
qprintf ("%5i used faces\n", c_outfaces);
qprintf ("%5i tiny faces\n", c_tiny);
qprintf ("%5i tiny clips\n", c_tiny_clip);
for (i=0 ; i<NUM_HULLS ; i++)
fclose (out[i]);
if (!glview)
{
EmitPlanes ();
WriteBSP (source);
}
end = I_FloatTime ();
printf ("%5.0f seconds elapsed\n", end-start);
return 0;
}