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brushbsp.cpp
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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
This file is part of Quake III Arena source code.
Quake III Arena source code 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.
Quake III Arena source code 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 Foobar; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
#include "qbsp.h"
#include "l_mem.h"
#include "botlib/aasfile.h"
#include "aas_store.h"
#include "aas_cfg.h"
#include <stddef.h>
#include <assert.h>
/*
each side has a count of the other sides it splits
the best split will be the one that minimizes the total split counts
of all remaining sides
precalc side on plane table
evaluate split side
{
cost = 0
for all sides
for all sides
get
if side splits side and splitside is on same child
cost++;
}
*/
int c_nodes;
int c_nonvis;
int c_active_brushes;
int c_solidleafnodes;
int c_totalsides;
int c_brushmemory;
int c_peak_brushmemory;
int c_nodememory;
int c_peak_totalbspmemory;
// if a brush just barely pokes onto the other side,
// let it slide by without chopping
#define PLANESIDE_EPSILON 0.001
//0.1
//#ifdef DEBUG
typedef struct cname_s
{
int value;
const char *name;
} cname_t;
cname_t contentnames[] =
{
{CONTENTS_SOLID,"CONTENTS_SOLID"},
{CONTENTS_WINDOW,"CONTENTS_WINDOW"},
{CONTENTS_AUX,"CONTENTS_AUX"},
{CONTENTS_LAVA,"CONTENTS_LAVA"},
{CONTENTS_SLIME,"CONTENTS_SLIME"},
{CONTENTS_WATER,"CONTENTS_WATER"},
{CONTENTS_MIST,"CONTENTS_MIST"},
{LAST_VISIBLE_CONTENTS,"LAST_VISIBLE_CONTENTS"},
{CONTENTS_AREAPORTAL,"CONTENTS_AREAPORTAL"},
{CONTENTS_PLAYERCLIP,"CONTENTS_PLAYERCLIP"},
{CONTENTS_MONSTERCLIP,"CONTENTS_MONSTERCLIP"},
{CONTENTS_CURRENT_0,"CONTENTS_CURRENT_0"},
{CONTENTS_CURRENT_90,"CONTENTS_CURRENT_90"},
{CONTENTS_CURRENT_180,"CONTENTS_CURRENT_180"},
{CONTENTS_CURRENT_270,"CONTENTS_CURRENT_270"},
{CONTENTS_CURRENT_UP,"CONTENTS_CURRENT_UP"},
{CONTENTS_CURRENT_DOWN,"CONTENTS_CURRENT_DOWN"},
{CONTENTS_ORIGIN,"CONTENTS_ORIGIN"},
{CONTENTS_MONSTER,"CONTENTS_MONSTER"},
{CONTENTS_DEADMONSTER,"CONTENTS_DEADMONSTER"},
{CONTENTS_DETAIL,"CONTENTS_DETAIL"},
{CONTENTS_Q2TRANSLUCENT,"CONTENTS_TRANSLUCENT"},
{CONTENTS_LADDER,"CONTENTS_LADDER"},
{0, 0}
};
void PrintContents(int contents)
{
int i;
for (i = 0; contentnames[i].value; i++)
{
if (contents & contentnames[i].value)
{
Log_Write("%s,", contentnames[i].name);
} //end if
} //end for
} //end of the function PrintContents
//#endif
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ResetBrushBSP(void)
{
c_nodes = 0;
c_nonvis = 0;
c_active_brushes = 0;
c_solidleafnodes = 0;
c_totalsides = 0;
c_brushmemory = 0;
c_peak_brushmemory = 0;
c_nodememory = 0;
c_peak_totalbspmemory = 0;
} //end of the function ResetBrushBSP
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void FindBrushInTree (node_t *node, int brushnum)
{
bspbrush_t *b;
if (node->planenum == PLANENUM_LEAF)
{
for (b=node->brushlist ; b ; b=b->next)
if (b->original->brushnum == brushnum)
Log_Print ("here\n");
return;
}
FindBrushInTree(node->children[0], brushnum);
FindBrushInTree(node->children[1], brushnum);
} //end of the function FindBrushInTree
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void DrawBrushList (bspbrush_t *brush, node_t *node)
{
int i;
side_t *s;
GLS_BeginScene ();
for ( ; brush ; brush=brush->next)
{
for (i=0 ; i<brush->numsides ; i++)
{
s = &brush->sides[i];
if (!s->winding)
continue;
if (s->texinfo == TEXINFO_NODE)
GLS_Winding (s->winding, 1);
else if (!(s->flags & SFL_VISIBLE))
GLS_Winding (s->winding, 2);
else
GLS_Winding (s->winding, 0);
}
}
GLS_EndScene ();
} //end of the function DrawBrushList
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void WriteBrushList (char *name, bspbrush_t *brush, qboolean onlyvis)
{
int i;
side_t *s;
FILE *f;
qprintf ("writing %s\n", name);
f = SafeOpenWrite (name);
for ( ; brush ; brush=brush->next)
{
for (i=0 ; i<brush->numsides ; i++)
{
s = &brush->sides[i];
if (!s->winding)
continue;
if (onlyvis && !(s->flags & SFL_VISIBLE))
continue;
OutputWinding (brush->sides[i].winding, f);
}
}
fclose (f);
} //end of the function WriteBrushList
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void PrintBrush (bspbrush_t *brush)
{
int i;
printf ("brush: %p\n", brush);
for (i=0;i<brush->numsides ; i++)
{
pw(brush->sides[i].winding);
printf ("\n");
} //end for
} //end of the function PrintBrush
//===========================================================================
// Sets the mins/maxs based on the windings
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void BoundBrush (bspbrush_t *brush)
{
int i, j;
winding_t *w;
ClearBounds (brush->mins, brush->maxs);
for (i=0 ; i<brush->numsides ; i++)
{
w = brush->sides[i].winding;
if (!w)
continue;
for (j=0 ; j<w->numpoints ; j++)
AddPointToBounds (w->p[j], brush->mins, brush->maxs);
}
} //end of the function BoundBrush
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void CreateBrushWindings (bspbrush_t *brush)
{
int i, j;
winding_t *w;
side_t *side;
plane_t *plane;
for (i=0 ; i<brush->numsides ; i++)
{
side = &brush->sides[i];
plane = &mapplanes[side->planenum];
w = BaseWindingForPlane (plane->normal, plane->dist);
for (j=0 ; j<brush->numsides && w; j++)
{
if (i == j)
continue;
if (brush->sides[j].flags & SFL_BEVEL)
continue;
plane = &mapplanes[brush->sides[j].planenum^1];
ChopWindingInPlace (&w, plane->normal, plane->dist, 0); //CLIP_EPSILON);
}
side->winding = w;
}
BoundBrush (brush);
} //end of the function CreateBrushWindings
//===========================================================================
// Creates a new axial brush
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
bspbrush_t *BrushFromBounds (vec3_t mins, vec3_t maxs)
{
bspbrush_t *b;
int i;
vec3_t normal;
vec_t dist;
b = AllocBrush (6);
b->numsides = 6;
for (i=0 ; i<3 ; i++)
{
VectorClear (normal);
normal[i] = 1;
dist = maxs[i];
b->sides[i].planenum = FindFloatPlane (normal, dist);
normal[i] = -1;
dist = -mins[i];
b->sides[3+i].planenum = FindFloatPlane (normal, dist);
}
CreateBrushWindings (b);
return b;
} //end of the function BrushFromBounds
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
int BrushOutOfBounds(bspbrush_t *brush, vec3_t mins, vec3_t maxs, float epsilon)
{
int i, j, n;
winding_t *w;
side_t *side;
for (i = 0; i < brush->numsides; i++)
{
side = &brush->sides[i];
w = side->winding;
for (j = 0; j < w->numpoints; j++)
{
for (n = 0; n < 3; n++)
{
if (w->p[j][n] < (mins[n] + epsilon) || w->p[j][n] > (maxs[n] - epsilon)) return qtrue;
} //end for
} //end for
} //end for
return qfalse;
} //end of the function BrushOutOfBounds
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
vec_t BrushVolume (bspbrush_t *brush)
{
int i;
winding_t *w;
vec3_t corner;
vec_t d, area, volume;
plane_t *plane;
if (!brush) return 0;
// grab the first valid point as the corner
w = NULL;
for (i = 0; i < brush->numsides; i++)
{
w = brush->sides[i].winding;
if (w) break;
} //end for
if (!w) return 0;
VectorCopy (w->p[0], corner);
// make tetrahedrons to all other faces
volume = 0;
for ( ; i < brush->numsides; i++)
{
w = brush->sides[i].winding;
if (!w) continue;
plane = &mapplanes[brush->sides[i].planenum];
d = -(DotProduct (corner, plane->normal) - plane->dist);
area = WindingArea(w);
volume += d * area;
} //end for
volume /= 3;
return volume;
} //end of the function BrushVolume
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
int CountBrushList (bspbrush_t *brushes)
{
int c;
c = 0;
for ( ; brushes; brushes = brushes->next) c++;
return c;
} //end of the function CountBrushList
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
node_t *AllocNode (void)
{
node_t *node;
node = (node_t*)GetMemory(sizeof(*node));
memset (node, 0, sizeof(*node));
if (numthreads == 1)
{
c_nodememory += MemorySize(node);
} //end if
return node;
} //end of the function AllocNode
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
bspbrush_t *AllocBrush (int numsides)
{
bspbrush_t *bb;
//This will allocate a little too much memory but the original C code used a nasty hack for allocating sides.
size_t c = sizeof(bspbrush_t)+sizeof(side_t)*numsides;
bb = (bspbrush_t*)GetMemory(c);
memset (bb, 0, c);
if (numthreads == 1)
{
c_active_brushes++;
c_brushmemory += MemorySize(bb);
if (c_brushmemory > c_peak_brushmemory)
c_peak_brushmemory = c_brushmemory;
} //end if
return bb;
} //end of the function AllocBrush
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void FreeBrush (bspbrush_t *brushes)
{
int i;
for (i=0 ; i<brushes->numsides ; i++)
if (brushes->sides[i].winding)
FreeWinding(brushes->sides[i].winding);
if (numthreads == 1)
{
c_active_brushes--;
c_brushmemory -= MemorySize(brushes);
if (c_brushmemory < 0) c_brushmemory = 0;
} //end if
FreeMemory(brushes);
} //end of the function FreeBrush
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void FreeBrushList (bspbrush_t *brushes)
{
bspbrush_t *next;
for ( ; brushes; brushes = next)
{
next = brushes->next;
FreeBrush(brushes);
} //end for
} //end of the function FreeBrushList
//===========================================================================
// Duplicates the brush, the sides, and the windings
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
bspbrush_t *CopyBrush (bspbrush_t *brush)
{
bspbrush_t *newbrush;
int i;
size_t offset = offsetof(bspbrush_t, sides[0]) + sizeof(side_t) * brush->numsides;
newbrush = AllocBrush (brush->numsides);
memcpy (newbrush, brush, offset);
for (i=0 ; i<brush->numsides ; i++)
{
if (brush->sides[i].winding)
newbrush->sides[i].winding = CopyWinding (brush->sides[i].winding);
}
return newbrush;
} //end of the function CopyBrush
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
node_t *PointInLeaf (node_t *node, vec3_t point)
{
vec_t d;
plane_t *plane;
while (node->planenum != PLANENUM_LEAF)
{
plane = &mapplanes[node->planenum];
d = DotProduct (point, plane->normal) - plane->dist;
if (d > 0)
node = node->children[0];
else
node = node->children[1];
}
return node;
} //end of the function PointInLeaf
//===========================================================================
// Returns PSIDE_FRONT, PSIDE_BACK, or PSIDE_BOTH
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
#if 0
int BoxOnPlaneSide (vec3_t mins, vec3_t maxs, plane_t *plane)
{
int side;
int i;
vec3_t corners[2];
vec_t dist1, dist2;
// axial planes are easy
if (plane->type < 3)
{
side = 0;
if (maxs[plane->type] > plane->dist+PLANESIDE_EPSILON)
side |= PSIDE_FRONT;
if (mins[plane->type] < plane->dist-PLANESIDE_EPSILON)
side |= PSIDE_BACK;
return side;
}
// create the proper leading and trailing verts for the box
for (i=0 ; i<3 ; i++)
{
if (plane->normal[i] < 0)
{
corners[0][i] = mins[i];
corners[1][i] = maxs[i];
}
else
{
corners[1][i] = mins[i];
corners[0][i] = maxs[i];
}
}
dist1 = DotProduct (plane->normal, corners[0]) - plane->dist;
dist2 = DotProduct (plane->normal, corners[1]) - plane->dist;
side = 0;
if (dist1 >= PLANESIDE_EPSILON)
side = PSIDE_FRONT;
if (dist2 < PLANESIDE_EPSILON)
side |= PSIDE_BACK;
return side;
}
#else
extern "C" int BoxOnPlaneSide (const vec3_t emins, const vec3_t emaxs, const plane_t *p)
{
float dist1, dist2;
int sides = 0;
// axial planes are easy
if (p->type < 3)
{
if (emaxs[p->type] > p->dist+PLANESIDE_EPSILON) sides |= PSIDE_FRONT;
if (emins[p->type] < p->dist-PLANESIDE_EPSILON) sides |= PSIDE_BACK;
return sides;
} //end if
// general case
switch (p->signbits)
{
case 0:
dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
dist2 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
break;
case 1:
dist1 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
break;
case 2:
dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
dist2 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
break;
case 3:
dist1 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
break;
case 4:
dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
dist2 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
break;
case 5:
dist1 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
break;
case 6:
dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
dist2 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
break;
case 7:
dist1 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
break;
default:
dist1 = dist2 = 0; // shut up compiler
// assert( 0 );
break;
}
sides = 0;
if (dist1 - p->dist >= PLANESIDE_EPSILON) sides = PSIDE_FRONT;
if (dist2 - p->dist < PLANESIDE_EPSILON) sides |= PSIDE_BACK;
// assert(sides != 0);
return sides;
}
#endif
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
int QuickTestBrushToPlanenum (const bspbrush_t *brush, int planenum, int *numsplits)
{
int i, num;
plane_t *plane;
int s;
*numsplits = 0;
plane = &mapplanes[planenum];
#ifdef ME
//fast axial cases
if (plane->type < 3)
{
if (plane->dist + PLANESIDE_EPSILON < brush->mins[plane->type])
return PSIDE_FRONT;
if (plane->dist - PLANESIDE_EPSILON > brush->maxs[plane->type])
return PSIDE_BACK;
} //end if
#endif //ME*/
// if the brush actually uses the planenum,
// we can tell the side for sure
for (i = 0; i < brush->numsides; i++)
{
num = brush->sides[i].planenum;
if (num >= MAX_MAPFILE_PLANES)
Error ("bad planenum");
if (num == planenum)
return PSIDE_BACK|PSIDE_FACING;
if (num == (planenum ^ 1) )
return PSIDE_FRONT|PSIDE_FACING;
}
// box on plane side
s = BoxOnPlaneSide (brush->mins, brush->maxs, plane);
// if both sides, count the visible faces split
if (s == PSIDE_BOTH)
{
*numsplits += 3;
}
return s;
} //end of the function QuickTestBrushToPlanenum
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
int TestBrushToPlanenum (bspbrush_t *brush, int planenum,
int *numsplits, qboolean *hintsplit, int *epsilonbrush)
{
int i, j, num;
plane_t *plane;
int s = 0;
winding_t *w;
vec_t d, d_front, d_back;
int front, back;
int type;
float dist;
*numsplits = 0;
*hintsplit = qfalse;
plane = &mapplanes[planenum];
#ifdef ME
//fast axial cases
type = plane->type;
if (type < 3)
{
dist = plane->dist;
if (dist + PLANESIDE_EPSILON < brush->mins[type]) return PSIDE_FRONT;
if (dist - PLANESIDE_EPSILON > brush->maxs[type]) return PSIDE_BACK;
if (brush->mins[type] < dist - PLANESIDE_EPSILON &&
brush->maxs[type] > dist + PLANESIDE_EPSILON) s = PSIDE_BOTH;
} //end if
if (s != PSIDE_BOTH)
#endif //ME
{
// if the brush actually uses the planenum,
// we can tell the side for sure
for (i = 0; i < brush->numsides; i++)
{
num = brush->sides[i].planenum;
if (num >= MAX_MAPFILE_PLANES) Error ("bad planenum");
if (num == planenum)
{
//we don't need to test this side plane again
brush->sides[i].flags |= SFL_TESTED;
return PSIDE_BACK|PSIDE_FACING;
} //end if
if (num == (planenum ^ 1) )
{
//we don't need to test this side plane again
brush->sides[i].flags |= SFL_TESTED;
return PSIDE_FRONT|PSIDE_FACING;
} //end if
} //end for
// box on plane side
s = BoxOnPlaneSide (brush->mins, brush->maxs, plane);
if (s != PSIDE_BOTH) return s;
} //end if
// if both sides, count the visible faces split
d_front = d_back = 0;
for (i = 0; i < brush->numsides; i++)
{
if (brush->sides[i].texinfo == TEXINFO_NODE)
continue; // on node, don't worry about splits
if (!(brush->sides[i].flags & SFL_VISIBLE))
continue; // we don't care about non-visible
w = brush->sides[i].winding;
if (!w) continue;
front = back = 0;
for (j = 0; j < w->numpoints; j++)
{
d = DotProduct(w->p[j], plane->normal) - plane->dist;
if (d > d_front) d_front = d;
if (d < d_back) d_back = d;
if (d > 0.1) // PLANESIDE_EPSILON)
front = 1;
if (d < -0.1) // PLANESIDE_EPSILON)
back = 1;
} //end for
if (front && back)
{
if ( !(brush->sides[i].surf & SURF_SKIP) )
{
(*numsplits)++;
if (brush->sides[i].surf & SURF_HINT)
{
*hintsplit = qtrue;
} //end if
} //end if
} //end if
} //end for
if ( (d_front > 0.0 && d_front < 1.0)
|| (d_back < 0.0 && d_back > -1.0) )
(*epsilonbrush)++;
#if 0
if (*numsplits == 0)
{ // didn't really need to be split
if (front) s = PSIDE_FRONT;
else if (back) s = PSIDE_BACK;
else s = 0;
}
#endif
return s;
} //end of the function TestBrushToPlanenum
//===========================================================================
// Returns qtrue if the winding would be crunched out of
// existance by the vertex snapping.
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
#define EDGE_LENGTH 0.2
qboolean WindingIsTiny (winding_t *w)
{
#if 0
if (WindingArea (w) < 1)
return qtrue;
return qfalse;
#else
int i, j;
vec_t len;
vec3_t delta;
int edges;
edges = 0;
for (i=0 ; i<w->numpoints ; i++)
{
j = i == w->numpoints - 1 ? 0 : i+1;
VectorSubtract (w->p[j], w->p[i], delta);
len = VectorLength (delta);
if (len > EDGE_LENGTH)
{
if (++edges == 3)
return qfalse;
}
}
return qtrue;
#endif
} //end of the function WindingIsTiny
//===========================================================================
// Returns qtrue if the winding still has one of the points
// from basewinding for plane
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
qboolean WindingIsHuge (winding_t *w)
{
int i, j;
for (i=0 ; i<w->numpoints ; i++)
{
for (j=0 ; j<3 ; j++)
if (w->p[i][j] < -BOGUS_RANGE+1 || w->p[i][j] > BOGUS_RANGE-1)
return qtrue;
}
return qfalse;
} //end of the function WindingIsHuge
//===========================================================================
// creates a leaf out of the given nodes with the given brushes
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void LeafNode(node_t *node, bspbrush_t *brushes)
{
bspbrush_t *b;
int i;
node->side = NULL;
node->planenum = PLANENUM_LEAF;
node->contents = 0;
for (b = brushes; b; b = b->next)
{
// if the brush is solid and all of its sides are on nodes,
// it eats everything
if (b->original->contents & CONTENTS_SOLID)
{
for (i=0 ; i<b->numsides ; i++)
if (b->sides[i].texinfo != TEXINFO_NODE)
break;
if (i == b->numsides)
{
node->contents = CONTENTS_SOLID;
break;
} //end if
} //end if
node->contents |= b->original->contents;
} //end for
if (create_aas)
{
node->expansionbboxes = 0;
node->contents = 0;
for (b = brushes; b; b = b->next)
{
node->expansionbboxes |= b->original->expansionbbox;
node->contents |= b->original->contents;
if (b->original->modelnum)
node->modelnum = b->original->modelnum;
} //end for
if (node->contents & CONTENTS_SOLID)
{
if (node->expansionbboxes != cfg.allpresencetypes)
{
node->contents &= ~CONTENTS_SOLID;
} //end if
} //end if
} //end if
node->brushlist = brushes;
} //end of the function LeafNode
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void CheckPlaneAgainstParents (int pnum, node_t *node)
{
node_t *p;
for (p = node->parent; p; p = p->parent)
{
if (p->planenum == pnum) Error("Tried parent");
} //end for
} //end of the function CheckPlaneAgainstParants
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
qboolean CheckPlaneAgainstVolume (int pnum, node_t *node)
{
bspbrush_t *front, *back;
SplitBrush (node->volume, pnum, &front, &back);
bool good = (front && back);
if (front) FreeBrush (front);
if (back) FreeBrush (back);
return static_cast<qboolean>(good);
} //end of the function CheckPlaneAgaintsVolume
//===========================================================================
// Using a hueristic, choses one of the sides out of the brushlist
// to partition the brushes with.
// Returns NULL if there are no valid planes to split with..
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
side_t *SelectSplitSide (bspbrush_t *brushes, node_t *node)
{
int value, bestvalue;
bspbrush_t *brush, *test;
side_t *side, *bestside;
int i, pass, numpasses;
int pnum;
int s;
int front, back, both, facing, splits;
int bsplits;
int epsilonbrush;
qboolean hintsplit = qfalse;
bestside = NULL;
bestvalue = -99999;
// the search order goes: visible-structural, visible-detail,
// nonvisible-structural, nonvisible-detail.
// If any valid plane is available in a pass, no further
// passes will be tried.
numpasses = 2;
for (pass = 0; pass < numpasses; pass++)
{
for (brush = brushes; brush; brush = brush->next)
{
// only check detail the second pass
// if ( (pass & 1) && !(brush->original->contents & CONTENTS_DETAIL) )
// continue;
// if ( !(pass & 1) && (brush->original->contents & CONTENTS_DETAIL) )
// continue;
for (i = 0; i < brush->numsides; i++)
{
side = brush->sides + i;
// if (side->flags & SFL_BEVEL)
// continue; // never use a bevel as a spliter
if (!side->winding)
continue; // nothing visible, so it can't split
if (side->texinfo == TEXINFO_NODE)
continue; // allready a node splitter