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vis.c
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/* -------------------------------------------------------------------------------
Copyright (C) 1999-2006 Id Software, Inc. and contributors.
For a list of contributors, see the accompanying CONTRIBUTORS file.
This file is part of GtkRadiant.
GtkRadiant is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
GtkRadiant is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
----------------------------------------------------------------------------------
This code has been altered significantly from its original form, to support
several games based on the Quake III Arena engine, in the form of "Q3Map2."
------------------------------------------------------------------------------- */
/* marker */
#define VIS_C
/* dependencies */
#include "kmap2.h"
void PlaneFromWinding(fixedWinding_t * w, visPlane_t * plane)
{
vec3_t v1, v2;
// calc plane
VectorSubtract(w->points[2], w->points[1], v1);
VectorSubtract(w->points[0], w->points[1], v2);
CrossProduct(v2, v1, plane->normal);
VectorNormalize(plane->normal);
plane->dist = DotProduct(w->points[0], plane->normal);
}
/*
NewFixedWinding()
returns a new fixed winding
ydnar: altered this a bit to reconcile multiply-defined winding_t
*/
fixedWinding_t *NewFixedWinding(int points)
{
fixedWinding_t *w;
int size;
if(points > MAX_POINTS_ON_WINDING)
Error("NewWinding: %i points", points);
size = (int)((size_t) ((fixedWinding_t *) 0)->points[points]);
w = safe_malloc(size);
memset(w, 0, size);
return w;
}
void prl(leaf_t * l)
{
int i;
vportal_t *p;
visPlane_t pl;
for(i = 0; i < l->numportals; i++)
{
p = l->portals[i];
pl = p->plane;
Sys_Printf("portal %4i to leaf %4i : %7.1f : (%4.1f, %4.1f, %4.1f)\n", (int)(p - portals), p->leaf, pl.dist, pl.normal[0],
pl.normal[1], pl.normal[2]);
}
}
//=============================================================================
/*
=============
SortPortals
Sorts the portals from the least complex, so the later ones can reuse
the earlier information.
=============
*/
int PComp(const void *a, const void *b)
{
if((*(vportal_t **) a)->nummightsee == (*(vportal_t **) b)->nummightsee)
return 0;
if((*(vportal_t **) a)->nummightsee < (*(vportal_t **) b)->nummightsee)
return -1;
return 1;
}
void SortPortals(void)
{
int i;
for(i = 0; i < numportals * 2; i++)
sorted_portals[i] = &portals[i];
if(nosort)
return;
qsort(sorted_portals, numportals * 2, sizeof(sorted_portals[0]), PComp);
}
/*
==============
LeafVectorFromPortalVector
==============
*/
int LeafVectorFromPortalVector(byte * portalbits, byte * leafbits)
{
int i, j, leafnum;
vportal_t *p;
int c_leafs;
for(i = 0; i < numportals * 2; i++)
{
if(portalbits[i >> 3] & (1 << (i & 7)))
{
p = portals + i;
leafbits[p->leaf >> 3] |= (1 << (p->leaf & 7));
}
}
for(j = 0; j < portalclusters; j++)
{
leafnum = j;
while(leafs[leafnum].merged >= 0)
leafnum = leafs[leafnum].merged;
//if the merged leaf is visible then the original leaf is visible
if(leafbits[leafnum >> 3] & (1 << (leafnum & 7)))
{
leafbits[j >> 3] |= (1 << (j & 7));
}
}
c_leafs = CountBits(leafbits, portalclusters);
return c_leafs;
}
/*
===============
ClusterMerge
Merges the portal visibility for a leaf
===============
*/
static int clustersizehistogram[MAX_MAP_LEAFS] = { 0 };
void ClusterMerge(int leafnum)
{
leaf_t *leaf;
byte portalvector[MAX_PORTALS / 8];
byte uncompressed[MAX_MAP_LEAFS / 8];
int i, j;
int numvis, mergedleafnum;
vportal_t *p;
int pnum;
// OR together all the portalvis bits
mergedleafnum = leafnum;
while(leafs[mergedleafnum].merged >= 0)
mergedleafnum = leafs[mergedleafnum].merged;
memset(portalvector, 0, portalbytes);
leaf = &leafs[mergedleafnum];
for(i = 0; i < leaf->numportals; i++)
{
p = leaf->portals[i];
if(p->removed)
continue;
if(p->status != stat_done)
Error("portal not done");
for(j = 0; j < portallongs; j++)
((long *)portalvector)[j] |= ((long *)p->portalvis)[j];
pnum = p - portals;
portalvector[pnum >> 3] |= 1 << (pnum & 7);
}
memset(uncompressed, 0, leafbytes);
uncompressed[mergedleafnum >> 3] |= (1 << (mergedleafnum & 7));
// convert portal bits to leaf bits
numvis = LeafVectorFromPortalVector(portalvector, uncompressed);
// if (uncompressed[leafnum>>3] & (1<<(leafnum&7)))
// Sys_Printf ("WARNING: Leaf portals saw into leaf\n");
// uncompressed[leafnum>>3] |= (1<<(leafnum&7));
numvis++; // count the leaf itself
//Sys_FPrintf (SYS_VRB,"cluster %4i : %4i visible\n", leafnum, numvis);
++clustersizehistogram[numvis];
memcpy(bspVisBytes + VIS_HEADER_SIZE + leafnum * leafbytes, uncompressed, leafbytes);
}
/*
==================
CalcPortalVis
==================
*/
void CalcPortalVis(void)
{
#ifdef MREDEBUG
Sys_Printf("%6d portals out of %d", 0, numportals * 2);
//get rid of the counter
RunThreadsOnIndividual(numportals * 2, qfalse, PortalFlow);
#else
RunThreadsOnIndividual(numportals * 2, qtrue, PortalFlow);
#endif
}
/*
==================
CalcPassageVis
==================
*/
void CalcPassageVis(void)
{
PassageMemory();
#ifdef MREDEBUG
_printf("%6d portals out of %d", 0, numportals * 2);
RunThreadsOnIndividual(numportals * 2, qfalse, CreatePassages);
_printf("\n");
_printf("%6d portals out of %d", 0, numportals * 2);
RunThreadsOnIndividual(numportals * 2, qfalse, PassageFlow);
_printf("\n");
#else
Sys_Printf("\n--- CreatePassages (%d) ---\n", numportals * 2);
RunThreadsOnIndividual(numportals * 2, qtrue, CreatePassages);
Sys_Printf("\n--- PassageFlow (%d) ---\n", numportals * 2);
RunThreadsOnIndividual(numportals * 2, qtrue, PassageFlow);
#endif
}
/*
==================
CalcPassagePortalVis
==================
*/
void CalcPassagePortalVis(void)
{
PassageMemory();
#ifdef MREDEBUG
Sys_Printf("%6d portals out of %d", 0, numportals * 2);
RunThreadsOnIndividual(numportals * 2, qfalse, CreatePassages);
Sys_Printf("\n");
Sys_Printf("%6d portals out of %d", 0, numportals * 2);
RunThreadsOnIndividual(numportals * 2, qfalse, PassagePortalFlow);
Sys_Printf("\n");
#else
Sys_Printf("\n--- CreatePassages (%d) ---\n", numportals * 2);
RunThreadsOnIndividual(numportals * 2, qtrue, CreatePassages);
Sys_Printf("\n--- PassagePortalFlow (%d) ---\n", numportals * 2);
RunThreadsOnIndividual(numportals * 2, qtrue, PassagePortalFlow);
#endif
}
/*
==================
CalcFastVis
==================
*/
void CalcFastVis(void)
{
int i;
// fastvis just uses mightsee for a very loose bound
for(i = 0; i < numportals * 2; i++)
{
portals[i].portalvis = portals[i].portalflood;
portals[i].status = stat_done;
}
}
/*
==================
CalcVis
==================
*/
void CalcVis(void)
{
int i, minvis, maxvis;
const char *value;
double mu, sigma, totalvis, totalvis2;
/* ydnar: rr2do2's farplane code */
farPlaneDist = 0.0f;
value = ValueForKey(&entities[0], "_farplanedist"); /* proper '_' prefixed key */
if(value[0] == '\0')
value = ValueForKey(&entities[0], "fogclip"); /* wolf compatibility */
if(value[0] == '\0')
value = ValueForKey(&entities[0], "distancecull"); /* sof2 compatibility */
if(value[0] != '\0')
{
farPlaneDist = atof(value);
if(farPlaneDist > 0.0f)
Sys_Printf("farplane distance = %.1f\n", farPlaneDist);
else
farPlaneDist = 0.0f;
}
Sys_Printf("\n--- BasePortalVis (%d) ---\n", numportals * 2);
RunThreadsOnIndividual(numportals * 2, qtrue, BasePortalVis);
// RunThreadsOnIndividual (numportals*2, qtrue, BetterPortalVis);
SortPortals();
if(fastvis)
{
CalcFastVis();
}
else if(noPassageVis)
{
CalcPortalVis();
}
else if(passageVisOnly)
{
CalcPassageVis();
}
else
{
CalcPassagePortalVis();
}
//
// assemble the leaf vis lists by oring and compressing the portal lists
//
Sys_Printf("creating leaf vis...\n");
for(i = 0; i < portalclusters; i++)
ClusterMerge(i);
totalvis = 0;
totalvis2 = 0;
minvis = -1;
maxvis = -1;
for(i = 0; i < MAX_MAP_LEAFS; ++i)
if(clustersizehistogram[i])
{
if(debugCluster)
Sys_FPrintf(SYS_VRB, "%4i clusters have exactly %4i visible clusters\n", clustersizehistogram[i], i);
/* cast is to prevent integer overflow */
totalvis += ((double)i) * ((double)clustersizehistogram[i]);
totalvis2 += ((double)i) * ((double)i) * ((double)clustersizehistogram[i]);
if(minvis < 0)
minvis = i;
maxvis = i;
}
mu = totalvis / portalclusters;
sigma = sqrt(totalvis2 / portalclusters - mu * mu);
Sys_Printf("Total clusters: %i\n", portalclusters);
Sys_Printf("Total visible clusters: %.0f\n", totalvis);
Sys_Printf("Average clusters visible: %.2f (%.3f%%/total)\n", mu, mu / portalclusters * 100.0);
Sys_Printf(" Standard deviation: %.2f (%.3f%%/total, %.3f%%/avg)\n", sigma, sigma / portalclusters * 100.0,
sigma / mu * 100.0);
Sys_Printf(" Minimum: %i (%.3f%%/total, %.3f%%/avg)\n", minvis, minvis / (double)portalclusters * 100.0,
minvis / mu * 100.0);
Sys_Printf(" Maximum: %i (%.3f%%/total, %.3f%%/avg)\n", maxvis, maxvis / (double)portalclusters * 100.0,
maxvis / mu * 100.0);
}
/*
==================
SetPortalSphere
==================
*/
void SetPortalSphere(vportal_t * p)
{
int i;
vec3_t total, dist;
fixedWinding_t *w;
float r, bestr;
w = p->winding;
VectorCopy(vec3_origin, total);
for(i = 0; i < w->numpoints; i++)
{
VectorAdd(total, w->points[i], total);
}
for(i = 0; i < 3; i++)
total[i] /= w->numpoints;
bestr = 0;
for(i = 0; i < w->numpoints; i++)
{
VectorSubtract(w->points[i], total, dist);
r = VectorLength(dist);
if(r > bestr)
bestr = r;
}
VectorCopy(total, p->origin);
p->radius = bestr;
}
/*
=============
Winding_PlanesConcave
=============
*/
#define WCONVEX_EPSILON 0.2
int Winding_PlanesConcave(fixedWinding_t * w1, fixedWinding_t * w2, vec3_t normal1, vec3_t normal2, float dist1, float dist2)
{
int i;
if(!w1 || !w2)
return qfalse;
// check if one of the points of winding 1 is at the front of the plane of winding 2
for(i = 0; i < w1->numpoints; i++)
{
if(DotProduct(normal2, w1->points[i]) - dist2 > WCONVEX_EPSILON)
return qtrue;
}
// check if one of the points of winding 2 is at the front of the plane of winding 1
for(i = 0; i < w2->numpoints; i++)
{
if(DotProduct(normal1, w2->points[i]) - dist1 > WCONVEX_EPSILON)
return qtrue;
}
return qfalse;
}
/*
============
TryMergeLeaves
============
*/
int TryMergeLeaves(int l1num, int l2num)
{
int i, j, k, n, numportals;
visPlane_t plane1, plane2;
leaf_t *l1, *l2;
vportal_t *p1, *p2;
vportal_t *portals[MAX_PORTALS_ON_LEAF];
for(k = 0; k < 2; k++)
{
if(k)
l1 = &leafs[l1num];
else
l1 = &faceleafs[l1num];
for(i = 0; i < l1->numportals; i++)
{
p1 = l1->portals[i];
if(p1->leaf == l2num)
continue;
for(n = 0; n < 2; n++)
{
if(n)
l2 = &leafs[l2num];
else
l2 = &faceleafs[l2num];
for(j = 0; j < l2->numportals; j++)
{
p2 = l2->portals[j];
if(p2->leaf == l1num)
continue;
//
plane1 = p1->plane;
plane2 = p2->plane;
if(Winding_PlanesConcave(p1->winding, p2->winding, plane1.normal, plane2.normal, plane1.dist, plane2.dist))
return qfalse;
}
}
}
}
for(k = 0; k < 2; k++)
{
if(k)
{
l1 = &leafs[l1num];
l2 = &leafs[l2num];
}
else
{
l1 = &faceleafs[l1num];
l2 = &faceleafs[l2num];
}
numportals = 0;
//the leaves can be merged now
for(i = 0; i < l1->numportals; i++)
{
p1 = l1->portals[i];
if(p1->leaf == l2num)
{
p1->removed = qtrue;
continue;
}
portals[numportals++] = p1;
}
for(j = 0; j < l2->numportals; j++)
{
p2 = l2->portals[j];
if(p2->leaf == l1num)
{
p2->removed = qtrue;
continue;
}
portals[numportals++] = p2;
}
for(i = 0; i < numportals; i++)
{
l2->portals[i] = portals[i];
}
l2->numportals = numportals;
l1->merged = l2num;
}
return qtrue;
}
/*
============
UpdatePortals
============
*/
void UpdatePortals(void)
{
int i;
vportal_t *p;
for(i = 0; i < numportals * 2; i++)
{
p = &portals[i];
if(p->removed)
continue;
while(leafs[p->leaf].merged >= 0)
p->leaf = leafs[p->leaf].merged;
}
}
/*
============
MergeLeaves
try to merge leaves but don't merge through hint splitters
============
*/
void MergeLeaves(void)
{
int i, j, nummerges, totalnummerges;
leaf_t *leaf;
vportal_t *p;
totalnummerges = 0;
do
{
nummerges = 0;
for(i = 0; i < portalclusters; i++)
{
leaf = &leafs[i];
//if this leaf is merged already
/* ydnar: vmods: merge all non-hint portals */
if(leaf->merged >= 0 && hint == qfalse)
continue;
for(j = 0; j < leaf->numportals; j++)
{
p = leaf->portals[j];
//
if(p->removed)
continue;
//never merge through hint portals
if(p->hint)
continue;
if(TryMergeLeaves(i, p->leaf))
{
UpdatePortals();
nummerges++;
break;
}
}
}
totalnummerges += nummerges;
} while(nummerges);
Sys_Printf("%6d leaves merged\n", totalnummerges);
}
/*
============
TryMergeWinding
============
*/
#define CONTINUOUS_EPSILON 0.005
fixedWinding_t *TryMergeWinding(fixedWinding_t * f1, fixedWinding_t * f2, vec3_t planenormal)
{
vec_t *p1, *p2, *p3, *p4, *back;
fixedWinding_t *newf;
int i, j, k, l;
vec3_t normal, delta;
vec_t dot;
qboolean keep1, keep2;
//
// find a common edge
//
p1 = p2 = NULL; // stop compiler warning
j = 0; //
for(i = 0; i < f1->numpoints; i++)
{
p1 = f1->points[i];
p2 = f1->points[(i + 1) % f1->numpoints];
for(j = 0; j < f2->numpoints; j++)
{
p3 = f2->points[j];
p4 = f2->points[(j + 1) % f2->numpoints];
for(k = 0; k < 3; k++)
{
if(fabs(p1[k] - p4[k]) > 0.1) //EQUAL_EPSILON) //ME
break;
if(fabs(p2[k] - p3[k]) > 0.1) //EQUAL_EPSILON) //ME
break;
} //end for
if(k == 3)
break;
} //end for
if(j < f2->numpoints)
break;
} //end for
if(i == f1->numpoints)
return NULL; // no matching edges
//
// check slope of connected lines
// if the slopes are colinear, the point can be removed
//
back = f1->points[(i + f1->numpoints - 1) % f1->numpoints];
VectorSubtract(p1, back, delta);
CrossProduct(planenormal, delta, normal);
VectorNormalize(normal);
back = f2->points[(j + 2) % f2->numpoints];
VectorSubtract(back, p1, delta);
dot = DotProduct(delta, normal);
if(dot > CONTINUOUS_EPSILON)
return NULL; // not a convex polygon
keep1 = (qboolean) (dot < -CONTINUOUS_EPSILON);
back = f1->points[(i + 2) % f1->numpoints];
VectorSubtract(back, p2, delta);
CrossProduct(planenormal, delta, normal);
VectorNormalize(normal);
back = f2->points[(j + f2->numpoints - 1) % f2->numpoints];
VectorSubtract(back, p2, delta);
dot = DotProduct(delta, normal);
if(dot > CONTINUOUS_EPSILON)
return NULL; // not a convex polygon
keep2 = (qboolean) (dot < -CONTINUOUS_EPSILON);
//
// build the new polygon
//
newf = NewFixedWinding(f1->numpoints + f2->numpoints);
// copy first polygon
for(k = (i + 1) % f1->numpoints; k != i; k = (k + 1) % f1->numpoints)
{
if(k == (i + 1) % f1->numpoints && !keep2)
continue;
VectorCopy(f1->points[k], newf->points[newf->numpoints]);
newf->numpoints++;
}
// copy second polygon
for(l = (j + 1) % f2->numpoints; l != j; l = (l + 1) % f2->numpoints)
{
if(l == (j + 1) % f2->numpoints && !keep1)
continue;
VectorCopy(f2->points[l], newf->points[newf->numpoints]);
newf->numpoints++;
}
return newf;
}
/*
============
MergeLeafPortals
============
*/
void MergeLeafPortals(void)
{
int i, j, k, nummerges, hintsmerged;
leaf_t *leaf;
vportal_t *p1, *p2;
fixedWinding_t *w;
nummerges = 0;
hintsmerged = 0;
for(i = 0; i < portalclusters; i++)
{
leaf = &leafs[i];
if(leaf->merged >= 0)
continue;
for(j = 0; j < leaf->numportals; j++)
{
p1 = leaf->portals[j];
if(p1->removed)
continue;
for(k = j + 1; k < leaf->numportals; k++)
{
p2 = leaf->portals[k];
if(p2->removed)
continue;
if(p1->leaf == p2->leaf)
{
w = TryMergeWinding(p1->winding, p2->winding, p1->plane.normal);
if(w)
{
free(p1->winding); //% FreeWinding(p1->winding);
p1->winding = w;
if(p1->hint && p2->hint)
hintsmerged++;
p1->hint |= p2->hint;
SetPortalSphere(p1);
p2->removed = qtrue;
nummerges++;
i--;
break;
}
}
}
if(k < leaf->numportals)
break;
}
}
Sys_Printf("%6d portals merged\n", nummerges);
Sys_Printf("%6d hint portals merged\n", hintsmerged);
}
/*
============
WritePortals
============
*/
int CountActivePortals(void)
{
int num, hints, j;
vportal_t *p;
num = 0;
hints = 0;
for(j = 0; j < numportals * 2; j++)
{
p = portals + j;
if(p->removed)
continue;
if(p->hint)
hints++;
num++;
}
Sys_Printf("%6d active portals\n", num);
Sys_Printf("%6d hint portals\n", hints);
return num;
}
/*
============
WritePortals
============
*/
void WriteFloat(FILE * f, vec_t v);
void WritePortals(char *filename)
{
int i, j, num;
FILE *pf;
vportal_t *p;
fixedWinding_t *w;
// write the file
pf = fopen(filename, "w");
if(!pf)
Error("Error opening %s", filename);
num = 0;
for(j = 0; j < numportals * 2; j++)
{
p = portals + j;
if(p->removed)
continue;
// if (!p->hint)
// continue;
num++;
}
fprintf(pf, "%s\n", PORTALFILE);
fprintf(pf, "%i\n", 0);
fprintf(pf, "%i\n", num); // + numfaces);
fprintf(pf, "%i\n", 0);
for(j = 0; j < numportals * 2; j++)
{
p = portals + j;
if(p->removed)
continue;
// if (!p->hint)
// continue;
w = p->winding;
fprintf(pf, "%i %i %i ", w->numpoints, 0, 0);
fprintf(pf, "%d ", p->hint);
for(i = 0; i < w->numpoints; i++)
{
fprintf(pf, "(");
WriteFloat(pf, w->points[i][0]);
WriteFloat(pf, w->points[i][1]);
WriteFloat(pf, w->points[i][2]);
fprintf(pf, ") ");
}
fprintf(pf, "\n");
}
/*
for (j = 0; j < numfaces; j++)
{
p = faces + j;
w = p->winding;
fprintf (pf,"%i %i %i ",w->numpoints, 0, 0);
fprintf (pf, "0 ");
for (i=0 ; i<w->numpoints ; i++)
{
fprintf (pf,"(");
WriteFloat (pf, w->points[i][0]);
WriteFloat (pf, w->points[i][1]);
WriteFloat (pf, w->points[i][2]);
fprintf (pf,") ");
}
fprintf (pf,"\n");
} */
fclose(pf);
}
/*
============
LoadPortals
============
*/
void LoadPortals(char *name)
{
int i, j, hint;
vportal_t *p;
leaf_t *l;
char magic[80];
FILE *f;
int numpoints;
fixedWinding_t *w;
int leafnums[2];
visPlane_t plane;
#ifdef KMAP2_NO_TYPE_PUNNING
byte4int_t blah;
byte *byteptr = NULL;
#endif
if(!strcmp(name, "-"))
f = stdin;
else
{
f = fopen(name, "r");
if(!f)
Error("LoadPortals: couldn't read %s\n", name);
}
if(fscanf(f, "%79s\n%i\n%i\n%i\n", magic, &portalclusters, &numportals, &numfaces) != 4)
Error("LoadPortals: failed to read header");
if(strcmp(magic, PORTALFILE))
Error("LoadPortals: not a portal file");
Sys_Printf("%6i portalclusters\n", portalclusters);
Sys_Printf("%6i numportals\n", numportals);
Sys_Printf("%6i numfaces\n", numfaces);
if(numportals > MAX_PORTALS)
Error("MAX_PORTALS");
// these counts should take advantage of 64 bit systems automatically
leafbytes = ((portalclusters + 63) & ~63) >> 3;
leaflongs = leafbytes / sizeof(long);
portalbytes = ((numportals * 2 + 63) & ~63) >> 3;
portallongs = portalbytes / sizeof(long);
// each file portal is split into two memory portals
portals = safe_malloc(2 * numportals * sizeof(vportal_t));
memset(portals, 0, 2 * numportals * sizeof(vportal_t));
leafs = safe_malloc(portalclusters * sizeof(leaf_t));
memset(leafs, 0, portalclusters * sizeof(leaf_t));
for(i = 0; i < portalclusters; i++)
leafs[i].merged = -1;
numBSPVisBytes = VIS_HEADER_SIZE + portalclusters * leafbytes;
if(numBSPVisBytes > MAX_MAP_VISIBILITY)
Error("MAX_MAP_VISIBILITY exceeded");
#ifdef KMAP2_NO_TYPE_PUNNING
blah.i = portalclusters;
byteptr = bspVisBytes;
Vec4_Copy(blah.b, byteptr);
blah.i = leafbytes;
byteptr += 4;
Vec4_Copy(blah.b, byteptr);
#else
((int *)bspVisBytes)[0] = portalclusters;
((int *)bspVisBytes)[1] = leafbytes;
#endif
for(i = 0, p = portals; i < numportals; i++)
{
if(fscanf(f, "%i %i %i ", &numpoints, &leafnums[0], &leafnums[1]) != 3)
Error("LoadPortals: reading portal %i", i);
if(numpoints > MAX_POINTS_ON_WINDING)
Error("LoadPortals: portal %i has too many points", i);
if((unsigned)leafnums[0] > portalclusters || (unsigned)leafnums[1] > portalclusters)
Error("LoadPortals: reading portal %i", i);
if(fscanf(f, "%i ", &hint) != 1)
Error("LoadPortals: reading hint state");
w = p->winding = NewFixedWinding(numpoints);
w->numpoints = numpoints;
for(j = 0; j < numpoints; j++)
{
double v[3];
int k;
// scanf into double, then assign to vec_t
// so we don't care what size vec_t is
if(fscanf(f, "(%lf %lf %lf ) ", &v[0], &v[1], &v[2]) != 3)
Error("LoadPortals: reading portal %i", i);
for(k = 0; k < 3; k++)
w->points[j][k] = v[k];
}
fscanf(f, "\n");
// calc plane
PlaneFromWinding(w, &plane);
// create forward portal
l = &leafs[leafnums[0]];
if(l->numportals == MAX_PORTALS_ON_LEAF)
Error("Leaf with too many portals");
l->portals[l->numportals] = p;
l->numportals++;
p->num = i + 1;
p->hint = hint;
p->winding = w;
VectorSubtract(vec3_origin, plane.normal, p->plane.normal);
p->plane.dist = -plane.dist;