/*
==================
CreateBrushWindings
==================
*/
void CreateBrushWindings (bspbrush_t *brush)
{
int i, j;
winding_t *w;
side_t *side;
plane_t *plane;
// translate the CSG problem to improve precision
Vector insidePoint = PointInsideBrush( brush );
Vector offset = -insidePoint;
for (i=0 ; i<brush->numsides ; i++)
{
side = &brush->sides[i];
plane = &g_MainMap->mapplanes[side->planenum];
w = BaseWindingForPlane (plane->normal, plane->dist + DotProduct(plane->normal, offset));
for (j=0 ; j<brush->numsides && w; j++)
{
if (i == j)
continue;
if (brush->sides[j].bevel)
continue;
plane = &g_MainMap->mapplanes[brush->sides[j].planenum^1];
ChopWindingInPlace (&w, plane->normal, plane->dist + DotProduct(plane->normal, offset), 0); //CLIP_EPSILON);
}
TranslateWinding( w, -offset );
side->winding = w;
}
BoundBrush (brush);
}
/**
* @brief makes basewindigs for sides and mins/maxs for the brush
* @returns false if the brush doesn't enclose a valid volume
*/
static void CreateBrushWindings (bspbrush_t* brush)
{
int i;
for (i = 0; i < brush->numsides; i++) {
side_t* side = &brush->sides[i];
const plane_t* plane = &mapplanes[side->planenum];
int j;
/* evidence that winding_t represents a hessian normal plane */
winding_t* w = BaseWindingForPlane(plane->normal, plane->dist);
for (j = 0; j < brush->numsides && w; j++) {
if (i == j)
continue;
/* back side clipaway */
if (brush->sides[j].planenum == (side->planenum ^ 1))
continue;
if (brush->sides[j].bevel)
continue;
plane = &mapplanes[brush->sides[j].planenum ^ 1];
ChopWindingInPlace(&w, plane->normal, plane->dist, 0); /*CLIP_EPSILON); */
/* fix broken windings that would generate trifans */
if (!FixWinding(w))
Verb_Printf(VERB_EXTRA, "removed degenerated edge(s) from winding\n");
}
side->winding = w;
}
BoundBrush(brush);
}
/*
==================
CreateBrushWindings
==================
*/
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].bevel)
continue;
plane = &mapplanes[brush->sides[j].planenum^1];
ChopWindingInPlace (&w, plane->normal, plane->dist, 0); //CLIP_EPSILON);
}
side->winding = w;
}
BoundBrush (brush);
}
/*
==================
CreateBrushWindings
makes basewindigs for sides and mins / maxs for the brush
returns false if the brush doesn't enclose a valid volume
==================
*/
bool CreateBrushWindings (uBrush_t *brush) {
int i, j;
idWinding *w;
idPlane *plane;
side_t *side;
for ( i = 0; i < brush->numsides; i++ ) {
side = &brush->sides[i];
plane = &dmapGlobals.mapPlanes[side->planenum];
w = new idWinding( *plane );
for ( j = 0; j < brush->numsides && w; j++ ) {
if ( i == j ) {
continue;
}
if ( brush->sides[j].planenum == ( brush->sides[i].planenum ^ 1 ) ) {
continue; // back side clipaway
}
plane = &dmapGlobals.mapPlanes[brush->sides[j].planenum^1];
w = w->Clip( *plane, 0 );//CLIP_EPSILON);
}
if ( side->winding ) {
delete side->winding;
}
side->winding = w;
}
return BoundBrush( brush );
}
/*
============
idBrush::FromWinding
============
*/
bool idBrush::FromWinding( const idWinding& w, const idPlane& windingPlane )
{
int i, j, bestAxis;
idPlane plane;
idVec3 normal, axialNormal;
sides.Append( new idBrushSide( windingPlane, -1 ) );
sides.Append( new idBrushSide( -windingPlane, -1 ) );
bestAxis = 0;
for( i = 1; i < 3; i++ )
{
if( idMath::Fabs( windingPlane.Normal()[i] ) > idMath::Fabs( windingPlane.Normal()[bestAxis] ) )
{
bestAxis = i;
}
}
axialNormal = vec3_origin;
if( windingPlane.Normal()[bestAxis] > 0.0f )
{
axialNormal[bestAxis] = 1.0f;
}
else
{
axialNormal[bestAxis] = -1.0f;
}
for( i = 0; i < w.GetNumPoints(); i++ )
{
j = ( i + 1 ) % w.GetNumPoints();
normal = ( w[j].ToVec3() - w[i].ToVec3() ).Cross( axialNormal );
if( normal.Normalize() < 0.5f )
{
continue;
}
plane.SetNormal( normal );
plane.FitThroughPoint( w[j].ToVec3() );
sides.Append( new idBrushSide( plane, -1 ) );
}
if( sides.Num() < 4 )
{
for( i = 0; i < sides.Num(); i++ )
{
delete sides[i];
}
sides.Clear();
return false;
}
sides[0]->winding = w.Copy();
windingsValid = true;
BoundBrush();
return true;
}
qboolean CreateBrushWindings( brush_t *brush )
{
dwinding_t *dw;
side_t *side;
plane_t *plane;
int i, j;
/* walk the list of brush sides */
for( i = 0; i < brush->numsides; i++ )
{
/* get side and plane */
side = &brush->sides[ i ];
plane = &mapplanes[ side->planenum ];
/* make huge winding (double precision) */
dw = BaseDWindingForPlane( plane->normal, plane->dist, MAX_WORLD_COORD );
/* walk the list of brush sides */
for( j = 0; j < brush->numsides && dw != NULL; j++ )
{
if( i == j )
continue;
if( brush->sides[ j ].planenum == (brush->sides[ i ].planenum ^ 1) )
continue; /* back side clipaway */
if( brush->sides[ j ].bevel )
continue;
plane = &mapplanes[ brush->sides[ j ].planenum ^ 1 ];
ChopDWindingInPlace( &dw, plane->normal, plane->dist, 0 );
/* ydnar: fix broken windings that would generate trifans */
FixDWinding( dw );
}
/* set side winding */
side->winding = 0;
if ( dw != NULL )
{
side->winding = WindingFromDWinding( dw );
FreeDWinding( dw );
}
}
/* find brush bounds */
return BoundBrush( brush );
}
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void CheckBSPBrush(bspbrush_t *brush)
{
int i, j;
plane_t *plane1, *plane2;
//check if the brush is convex... flipped planes make a brush non-convex
for (i = 0; i < brush->numsides; i++)
{
for (j = 0; j < brush->numsides; j++)
{
if (i == j) continue;
plane1 = &mapplanes[brush->sides[i].planenum];
plane2 = &mapplanes[brush->sides[j].planenum];
//
if (WindingsNonConvex(brush->sides[i].winding,
brush->sides[j].winding,
plane1->normal, plane2->normal,
plane1->dist, plane2->dist))
{
Log_Print("non convex brush");
break;
} //end if
} //end for
} //end for
BoundBrush(brush);
//check for out of bound brushes
for (i = 0; i < 3; i++)
{
if (brush->mins[i] < -MAX_MAP_BOUNDS || brush->maxs[i] > MAX_MAP_BOUNDS)
{
Log_Print("brush: bounds out of range\n");
Log_Print("ob->mins[%d] = %f, ob->maxs[%d] = %f\n", i, brush->mins[i], i, brush->maxs[i]);
break;
} //end if
if (brush->mins[i] > MAX_MAP_BOUNDS || brush->maxs[i] < -MAX_MAP_BOUNDS)
{
Log_Print("brush: no visible sides on brush\n");
Log_Print("ob->mins[%d] = %f, ob->maxs[%d] = %f\n", i, brush->mins[i], i, brush->maxs[i]);
break;
} //end if
} //end for
} //end of the function CheckBSPBrush
/*
==================
CreateBrushWindings
makes basewindigs for sides and mins / maxs for the brush
returns false if the brush doesn't enclose a valid volume
==================
*/
qboolean 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];
// don't create a winding for a bevel
if(side->bevel)
{
continue;
}
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].planenum == (brush->sides[i].planenum ^ 1))
continue; // back side clipaway
if(brush->sides[j].bevel)
continue;
if(brush->sides[j].backSide)
continue;
plane = &mapPlanes[brush->sides[j].planenum ^ 1];
ChopWindingInPlace(&w, plane->normal, plane->dist, 0); //CLIP_EPSILON);
}
// free any existing winding
if(side->winding)
{
FreeWinding(side->winding);
}
side->winding = w;
}
return BoundBrush(brush);
}
void SplitBrush( bspbrush_t *brush, int planenum, bspbrush_t **front, bspbrush_t **back )
{
bspbrush_t *b[2];
int i, j;
winding_t *w, *cw[2], *midwinding;
plane_t *plane, *plane2;
side_t *s, *cs;
float d, d_front, d_back;
*front = *back = NULL;
plane = &g_MainMap->mapplanes[planenum];
// check all points
d_front = d_back = 0;
for (i=0 ; i<brush->numsides ; i++)
{
w = brush->sides[i].winding;
if (!w)
continue;
for (j=0 ; j<w->numpoints ; j++)
{
d = DotProduct (w->p[j], plane->normal) - plane->dist;
if (d > 0 && d > d_front)
d_front = d;
if (d < 0 && d < d_back)
d_back = d;
}
}
if (d_front < 0.1) // PLANESIDE_EPSILON)
{ // only on back
*back = CopyBrush (brush);
return;
}
if (d_back > -0.1) // PLANESIDE_EPSILON)
{ // only on front
*front = CopyBrush (brush);
return;
}
// Move the CSG problem so that offset is at the origin
// This gives us much better floating point precision in the clipping operations
Vector offset = -0.5f * (brush->mins + brush->maxs);
// create a new winding from the split plane
w = BaseWindingForPlane (plane->normal, plane->dist + DotProduct(plane->normal,offset));
for (i=0 ; i<brush->numsides && w ; i++)
{
plane2 = &g_MainMap->mapplanes[brush->sides[i].planenum ^ 1];
ChopWindingInPlace (&w, plane2->normal, plane2->dist+DotProduct(plane2->normal,offset), 0); // PLANESIDE_EPSILON);
}
if (!w || WindingIsTiny (w) )
{ // the brush isn't really split
int side;
side = BrushMostlyOnSide (brush, plane);
if (side == PSIDE_FRONT)
*front = CopyBrush (brush);
if (side == PSIDE_BACK)
*back = CopyBrush (brush);
return;
}
if (WindingIsHuge (w))
{
qprintf ("WARNING: huge winding\n");
}
TranslateWinding( w, -offset );
midwinding = w;
//
//
// split it for real
//
//
//
// allocate two new brushes referencing the original
//
for( i = 0; i < 2; i++ )
{
b[i] = AllocBrush( brush->numsides + 1 );
b[i]->original = brush->original;
}
//
// split all the current windings
//
for( i = 0; i < brush->numsides; i++ )
{
// get the current side
s = &brush->sides[i];
// get the sides winding
w = s->winding;
if( !w )
continue;
// clip the winding
ClipWindingEpsilon_Offset( w, plane->normal, plane->dist, 0 /*PLANESIDE_EPSILON*/, &cw[0], &cw[1], offset );
for( j = 0; j < 2; j++ )
{
// does winding exist?
if( !cw[j] )
continue;
#if 0
if (WindingIsTiny (cw[j]))
{
FreeWinding (cw[j]);
continue;
}
#endif
//
// create a clipped "side" with the new winding
//
cs = &b[j]->sides[b[j]->numsides];
b[j]->numsides++;
*cs = *s;
cs->winding = cw[j];
cs->tested = false;
// save the original side information
//cs->original = s->original;
}
}
// see if we have valid polygons on both sides
for (i=0 ; i<2 ; i++)
{
BoundBrush (b[i]);
for (j=0 ; j<3 ; j++)
{
if (b[i]->mins[j] < MIN_COORD_INTEGER || b[i]->maxs[j] > MAX_COORD_INTEGER)
{
qprintf ("bogus brush after clip\n");
break;
}
}
if (b[i]->numsides < 3 || j < 3)
{
FreeBrush (b[i]);
b[i] = NULL;
}
}
if ( !(b[0] && b[1]) )
{
if (!b[0] && !b[1])
qprintf ("split removed brush\n");
else
qprintf ("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->texinfo = TEXINFO_NODE;
// initialize the displacement map index
cs->pMapDisp = NULL;
cs->visible = false;
cs->tested = false;
if (i==0)
cs->winding = CopyWinding (midwinding);
else
cs->winding = midwinding;
}
{
vec_t v1;
int i;
for (i=0 ; i<2 ; i++)
{
v1 = BrushVolume (b[i]);
if (v1 < 1.0)
{
FreeBrush (b[i]);
b[i] = NULL;
// qprintf ("tiny volume after clip\n");
}
}
}
*front = b[0];
*back = b[1];
}
void SplitBrush( brush_t *brush, int planenum, brush_t **front, brush_t **back ){
brush_t *b[2];
int i, j;
winding_t *w, *cw[2], *midwinding;
plane_t *plane, *plane2;
side_t *s, *cs;
float d, d_front, d_back;
*front = NULL;
*back = NULL;
plane = &mapplanes[planenum];
// check all points
d_front = d_back = 0;
for ( i = 0 ; i < brush->numsides ; i++ )
{
w = brush->sides[i].winding;
if ( !w ) {
continue;
}
for ( j = 0 ; j < w->numpoints ; j++ )
{
d = DotProduct( w->p[j], plane->normal ) - plane->dist;
if ( d > 0 && d > d_front ) {
d_front = d;
}
if ( d < 0 && d < d_back ) {
d_back = d;
}
}
}
if ( d_front < 0.1 ) { // PLANESIDE_EPSILON)
// only on back
*back = CopyBrush( brush );
return;
}
if ( d_back > -0.1 ) { // PLANESIDE_EPSILON)
// only on front
*front = CopyBrush( brush );
return;
}
// create a new winding from the split plane
w = BaseWindingForPlane( plane->normal, plane->dist );
for ( i = 0 ; i < brush->numsides && w ; i++ )
{
plane2 = &mapplanes[brush->sides[i].planenum ^ 1];
ChopWindingInPlace( &w, plane2->normal, plane2->dist, 0 ); // PLANESIDE_EPSILON);
}
if ( !w || WindingIsTiny( w ) ) { // the brush isn't really split
int side;
side = BrushMostlyOnSide( brush, plane );
if ( side == PSIDE_FRONT ) {
*front = CopyBrush( brush );
}
if ( side == PSIDE_BACK ) {
*back = CopyBrush( brush );
}
return;
}
if ( WindingIsHuge( w ) ) {
Sys_FPrintf( SYS_VRB,"WARNING: huge winding\n" );
}
midwinding = w;
// split it for real
for ( i = 0 ; i < 2 ; i++ )
{
b[i] = AllocBrush( brush->numsides + 1 );
memcpy( b[i], brush, sizeof( brush_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;
}
/* strict, in parallel case we get the face back because it also is the midwinding */
ClipWindingEpsilonStrict( w, plane->normal, plane->dist,
0 /*PLANESIDE_EPSILON*/, &cw[0], &cw[1] );
for ( j = 0 ; j < 2 ; j++ )
{
if ( !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 ( b[i]->numsides < 3 || !BoundBrush( b[i] ) ) {
if ( b[i]->numsides >= 3 ) {
Sys_FPrintf( SYS_VRB,"bogus brush after clip\n" );
}
FreeBrush( b[i] );
b[i] = NULL;
}
}
if ( !( b[0] && b[1] ) ) {
if ( !b[0] && !b[1] ) {
Sys_FPrintf( SYS_VRB,"split removed brush\n" );
}
else{
Sys_FPrintf( SYS_VRB,"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->shaderInfo = NULL;
if ( i == 0 ) {
cs->winding = CopyWinding( midwinding );
}
else{
cs->winding = midwinding;
}
}
{
vec_t v1;
int i;
for ( i = 0 ; i < 2 ; i++ )
{
v1 = BrushVolume( b[i] );
if ( v1 < 1.0 ) {
FreeBrush( b[i] );
b[i] = NULL;
// Sys_FPrintf (SYS_VRB,"tiny volume after clip\n");
}
}
}
*front = b[0];
*back = b[1];
}
qboolean CreateBrushWindings( brush_t *brush ){
int i, j;
#if Q3MAP2_EXPERIMENTAL_HIGH_PRECISION_MATH_FIXES
winding_accu_t *w;
#else
winding_t *w;
#endif
side_t *side;
plane_t *plane;
/* walk the list of brush sides */
for ( i = 0; i < brush->numsides; i++ )
{
/* get side and plane */
side = &brush->sides[ i ];
plane = &mapplanes[ side->planenum ];
/* make huge winding */
#if Q3MAP2_EXPERIMENTAL_HIGH_PRECISION_MATH_FIXES
w = BaseWindingForPlaneAccu( plane->normal, plane->dist );
#else
w = BaseWindingForPlane( plane->normal, plane->dist );
#endif
/* walk the list of brush sides */
for ( j = 0; j < brush->numsides && w != NULL; j++ )
{
if ( i == j ) {
continue;
}
if ( brush->sides[ j ].planenum == ( brush->sides[ i ].planenum ^ 1 ) ) {
continue; /* back side clipaway */
}
if ( brush->sides[ j ].bevel ) {
continue;
}
plane = &mapplanes[ brush->sides[ j ].planenum ^ 1 ];
#if Q3MAP2_EXPERIMENTAL_HIGH_PRECISION_MATH_FIXES
ChopWindingInPlaceAccu( &w, plane->normal, plane->dist, 0 );
#else
ChopWindingInPlace( &w, plane->normal, plane->dist, 0 ); // CLIP_EPSILON );
#endif
/* ydnar: fix broken windings that would generate trifans */
#if Q3MAP2_EXPERIMENTAL_HIGH_PRECISION_MATH_FIXES
// I think it's better to FixWindingAccu() once after we chop with all planes
// so that error isn't multiplied. There is nothing natural about welding
// the points unless they are the final endpoints. ChopWindingInPlaceAccu()
// is able to handle all kinds of degenerate windings.
#else
FixWinding( w );
#endif
}
/* set side winding */
#if Q3MAP2_EXPERIMENTAL_HIGH_PRECISION_MATH_FIXES
if ( w != NULL ) {
FixWindingAccu( w );
if ( w->numpoints < 3 ) {
FreeWindingAccu( w );
w = NULL;
}
}
side->winding = ( w ? CopyWindingAccuToRegular( w ) : NULL );
if ( w ) {
FreeWindingAccu( w );
}
#else
side->winding = w;
#endif
}
/* find brush bounds */
return BoundBrush( brush );
}
/*
================
SplitBrush
Generates two new brushes, leaving the original
unchanged
================
*/
void SplitBrush (bspbrush_t *brush, int planenum,
bspbrush_t **front, bspbrush_t **back)
{
bspbrush_t *b[2];
int i, j;
winding_t *w, *cw[2], *midwinding;
plane_t *plane, *plane2;
side_t *s, *cs;
float d, d_front, d_back;
*front = *back = NULL;
plane = &mapplanes[planenum];
// check all points
d_front = d_back = 0;
for (i=0 ; i<brush->numsides ; i++)
{
w = brush->sides[i].winding;
if (!w)
continue;
for (j=0 ; j<w->numpoints ; j++)
{
d = DotProduct (w->p[j], plane->normal) - plane->dist;
if (d > 0 && d > d_front)
d_front = d;
if (d < 0 && d < d_back)
d_back = d;
}
}
if (d_front < 0.1) // PLANESIDE_EPSILON)
{ // only on back
*back = CopyBrush (brush);
return;
}
if (d_back > -0.1) // PLANESIDE_EPSILON)
{ // only on front
*front = CopyBrush (brush);
return;
}
// create a new winding from the split plane
w = BaseWindingForPlane (plane->normal, plane->dist);
for (i=0 ; i<brush->numsides && w ; i++)
{
plane2 = &mapplanes[brush->sides[i].planenum ^ 1];
ChopWindingInPlace (&w, plane2->normal, plane2->dist, 0); // PLANESIDE_EPSILON);
}
if (!w || WindingIsTiny (w) )
{ // the brush isn't really split
int side;
side = BrushMostlyOnSide (brush, plane);
if (side == PSIDE_FRONT)
*front = CopyBrush (brush);
if (side == PSIDE_BACK)
*back = CopyBrush (brush);
return;
}
if (WindingIsHuge (w))
{
qprintf ("WARNING: huge winding\n");
}
midwinding = w;
// split it for real
for (i=0 ; i<2 ; i++)
{
b[i] = AllocBrush (brush->numsides+1);
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;
ClipWindingEpsilon (w, plane->normal, plane->dist,
0 /*PLANESIDE_EPSILON*/, &cw[0], &cw[1]);
for (j=0 ; j<2 ; j++)
{
if (!cw[j])
continue;
#if 0
if (WindingIsTiny (cw[j]))
{
FreeWinding (cw[j]);
continue;
}
#endif
cs = &b[j]->sides[b[j]->numsides];
b[j]->numsides++;
*cs = *s;
// cs->planenum = s->planenum;
// cs->texinfo = s->texinfo;
// cs->visible = s->visible;
// cs->original = s->original;
cs->winding = cw[j];
cs->tested = false;
}
}
// see if we have valid polygons on both sides
for (i=0 ; i<2 ; i++)
{
BoundBrush (b[i]);
for (j=0 ; j<3 ; j++)
{
if (b[i]->mins[j] < -4096 || b[i]->maxs[j] > 4096)
{
qprintf ("bogus brush after clip\n");
break;
}
}
if (b[i]->numsides < 3 || j < 3)
{
FreeBrush (b[i]);
b[i] = NULL;
}
}
if ( !(b[0] && b[1]) )
{
if (!b[0] && !b[1])
qprintf ("split removed brush\n");
else
qprintf ("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->texinfo = TEXINFO_NODE;
cs->visible = false;
cs->tested = false;
if (i==0)
cs->winding = CopyWinding (midwinding);
else
cs->winding = midwinding;
}
{
vec_t v1;
int i;
for (i=0 ; i<2 ; i++)
{
v1 = BrushVolume (b[i]);
if (v1 < 1.0)
{
FreeBrush (b[i]);
b[i] = NULL;
// qprintf ("tiny volume after clip\n");
}
}
}
*front = b[0];
*back = b[1];
}
/*
================
SplitBrush
Generates two new brushes, leaving the original
unchanged
================
*/
void SplitBrush( uBrush_t *brush, int planenum, uBrush_t **front, uBrush_t **back )
{
uBrush_t *b[2];
int i, j;
idWinding *w, *cw[2], *midwinding;
side_t *s, *cs;
float d, d_front, d_back;
*front = *back = NULL;
idPlane &plane = dmapGlobals.mapPlanes[planenum];
// check all points
d_front = d_back = 0;
for( i = 0; i < brush->numsides; i++ )
{
w = brush->sides[i].winding;
if( !w )
{
continue;
}
for( j = 0; j < w->GetNumPoints(); j++ )
{
d = plane.Distance( ( *w ) [j].ToVec3() );
if( d > 0 && d > d_front )
{
d_front = d;
}
if( d < 0 && d < d_back )
{
d_back = d;
}
}
}
if( d_front < 0.1 ) // PLANESIDE_EPSILON)
{
// only on back
*back = CopyBrush( brush );
return;
}
if( d_back > -0.1 ) // PLANESIDE_EPSILON)
{
// only on front
*front = CopyBrush( brush );
return;
}
// create a new winding from the split plane
w = new idWinding( plane );
for( i = 0; i < brush->numsides && w; i++ )
{
idPlane &plane2 = dmapGlobals.mapPlanes[brush->sides[i].planenum ^ 1];
w = w->Clip( plane2, 0 ); // PLANESIDE_EPSILON);
}
if( !w || w->IsTiny() )
{
// the brush isn't really split
int side;
side = BrushMostlyOnSide( brush, plane );
if( side == PSIDE_FRONT )
{
*front = CopyBrush( brush );
}
if( side == PSIDE_BACK )
{
*back = CopyBrush( brush );
}
return;
}
if( w->IsHuge() )
{
common->Printf( "WARNING: huge winding\n" );
}
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, &cw[0], &cw[1] );
for( j = 0; j < 2; j++ )
{
if( !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;
}
}
for( i = 0; i < 2; i++ )
{
float 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];
}
/*
============
idBrush::TryMerge
============
*/
bool idBrush::TryMerge( const idBrush* brush, const idPlaneSet& planeList )
{
int i, j, k, l, m, seperatingPlane;
const idBrush* brushes[2];
const idWinding* w;
const idPlane* plane;
// brush bounds should overlap
for( i = 0; i < 3; i++ )
{
if( bounds[0][i] > brush->bounds[1][i] + 0.1f )
{
return false;
}
if( bounds[1][i] < brush->bounds[0][i] - 0.1f )
{
return false;
}
}
// the brushes should share an opposite plane
seperatingPlane = -1;
for( i = 0; i < GetNumSides(); i++ )
{
for( j = 0; j < brush->GetNumSides(); j++ )
{
if( GetSide( i )->GetPlaneNum() == ( brush->GetSide( j )->GetPlaneNum() ^ 1 ) )
{
// may only have one seperating plane
if( seperatingPlane != -1 )
{
return false;
}
seperatingPlane = GetSide( i )->GetPlaneNum();
break;
}
}
}
if( seperatingPlane == -1 )
{
return false;
}
brushes[0] = this;
brushes[1] = brush;
for( i = 0; i < 2; i++ )
{
j = !i;
for( k = 0; k < brushes[i]->GetNumSides(); k++ )
{
// if the brush side plane is the seprating plane
if( !( ( brushes[i]->GetSide( k )->GetPlaneNum() ^ seperatingPlane ) >> 1 ) )
{
continue;
}
plane = &brushes[i]->GetSide( k )->GetPlane();
// all the non seperating brush sides of the other brush should be at the back or on the plane
for( l = 0; l < brushes[j]->GetNumSides(); l++ )
{
w = brushes[j]->GetSide( l )->GetWinding();
if( !w )
{
continue;
}
if( !( ( brushes[j]->GetSide( l )->GetPlaneNum() ^ seperatingPlane ) >> 1 ) )
{
continue;
}
for( m = 0; m < w->GetNumPoints(); m++ )
{
if( plane->Distance( ( *w )[m].ToVec3() ) > 0.1f )
{
return false;
}
}
}
}
}
// add any sides from the other brush to this brush
for( i = 0; i < brush->GetNumSides(); i++ )
{
for( j = 0; j < GetNumSides(); j++ )
{
if( !( ( brush->GetSide( i )->GetPlaneNum() ^ GetSide( j )->GetPlaneNum() ) >> 1 ) )
{
break;
}
}
if( j < GetNumSides() )
{
sides[j]->flags &= brush->GetSide( i )->GetFlags();
continue;
}
sides.Append( brush->GetSide( i )->Copy() );
}
// remove any side from this brush that is the opposite of a side of the other brush
for( i = 0; i < GetNumSides(); i++ )
{
for( j = 0; j < brush->GetNumSides(); j++ )
{
if( GetSide( i )->GetPlaneNum() == ( brush->GetSide( j )->GetPlaneNum() ^ 1 ) )
{
break;
}
}
if( j < brush->GetNumSides() )
{
delete sides[i];
sides.RemoveIndex( i );
i--;
continue;
}
}
contents |= brush->contents;
CreateWindings();
BoundBrush();
return true;
}
/**
* @brief Generates two new brushes, leaving the original unchanged
*/
void SplitBrush(brush_t *brush, int32_t plane_num, brush_t **front, brush_t **back) {
brush_t *b[2];
int32_t i, j;
winding_t *w, *cw[2], *midwinding;
map_plane_t *plane, *plane2;
side_t *s, *cs;
vec_t d, d_front, d_back;
*front = *back = NULL;
plane = &map_planes[plane_num];
// check all points
d_front = d_back = 0;
for (i = 0; i < brush->num_sides; i++) {
w = brush->sides[i].winding;
if (!w) {
continue;
}
for (j = 0; j < w->num_points; j++) {
d = DotProduct(w->points[j], plane->normal) - plane->dist;
if (d > 0 && d > d_front) {
d_front = d;
}
if (d < 0 && d < d_back) {
d_back = d;
}
}
}
if (d_front < 0.1) { // PLANESIDE_EPSILON)
// only on back
*back = CopyBrush(brush);
return;
}
if (d_back > -0.1) { // PLANESIDE_EPSILON)
// only on front
*front = CopyBrush(brush);
return;
}
// create a new winding from the split plane
w = WindingForPlane(plane->normal, plane->dist);
for (i = 0; i < brush->num_sides && w; i++) {
plane2 = &map_planes[brush->sides[i].plane_num ^ 1];
ChopWindingInPlace(&w, plane2->normal, plane2->dist, 0); // PLANESIDE_EPSILON);
}
if (!w || WindingIsTiny(w)) { // the brush isn't really split
int32_t side;
side = BrushMostlyOnSide(brush, plane);
if (side == SIDE_FRONT) {
*front = CopyBrush(brush);
}
if (side == SIDE_BACK) {
*back = CopyBrush(brush);
}
return;
}
if (WindingIsHuge(w)) {
Mon_SendWinding(ERROR_WARN, (const vec3_t *) w->points, w->num_points, "Large winding");
}
midwinding = w;
// split it for real
for (i = 0; i < 2; i++) {
b[i] = AllocBrush(brush->num_sides + 1);
b[i]->original = brush->original;
}
// split all the current windings
for (i = 0; i < brush->num_sides; i++) {
s = &brush->sides[i];
w = s->winding;
if (!w) {
continue;
}
ClipWindingEpsilon(w, plane->normal, plane->dist, 0 /*PLANESIDE_EPSILON */, &cw[0], &cw[1]);
for (j = 0; j < 2; j++) {
if (!cw[j]) {
continue;
}
cs = &b[j]->sides[b[j]->num_sides];
b[j]->num_sides++;
*cs = *s;
cs->winding = cw[j];
cs->tested = false;
}
}
// see if we have valid polygons on both sides
for (i = 0; i < 2; i++) {
BoundBrush(b[i]);
for (j = 0; j < 3; j++) {
if (b[i]->mins[j] < MIN_WORLD_COORD || b[i]->maxs[j] > MAX_WORLD_COORD) {
Com_Debug(DEBUG_ALL, "bogus brush after clip\n");
break;
}
}
if (b[i]->num_sides < 3 || j < 3) {
FreeBrush(b[i]);
b[i] = NULL;
}
}
if (!(b[0] && b[1])) {
if (!b[0] && !b[1]) {
Com_Debug(DEBUG_ALL, "split removed brush\n");
} else {
Com_Debug(DEBUG_ALL, "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]->num_sides];
b[i]->num_sides++;
cs->plane_num = plane_num ^ i ^ 1;
cs->texinfo = TEXINFO_NODE;
cs->visible = false;
cs->tested = false;
if (i == 0) {
cs->winding = CopyWinding(midwinding);
} else {
cs->winding = midwinding;
}
}
{
vec_t v1;
for (i = 0; i < 2; i++) {
v1 = BrushVolume(b[i]);
if (v1 < 1.0) {
FreeBrush(b[i]);
b[i] = NULL;
Com_Debug(DEBUG_ALL, "tiny volume after clip\n");
}
}
}
*front = b[0];
*back = b[1];
}
//===========================================================================
// NOTE: can't keep brush->original intact
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
bspbrush_t *TryMergeBrushes(bspbrush_t *brush1, bspbrush_t *brush2)
{
int i, j, k, n, shared;
side_t *side1, *side2, *cs;
plane_t *plane1, *plane2;
bspbrush_t *newbrush;
//check for bounding box overlapp
for (i = 0; i < 3; i++)
{
if (brush1->mins[i] > brush2->maxs[i] + 2
|| brush1->maxs[i] < brush2->mins[i] - 2)
{
return NULL;
} //end if
} //end for
//
shared = 0;
//check if the brush is convex... flipped planes make a brush non-convex
for (i = 0; i < brush1->numsides; i++)
{
side1 = &brush1->sides[i];
//don't check the "shared" sides
for (k = 0; k < brush2->numsides; k++)
{
side2 = &brush2->sides[k];
if (side1->planenum == (side2->planenum^1))
{
shared++;
//there may only be ONE shared side
if (shared > 1) return NULL;
break;
} //end if
} //end for
if (k < brush2->numsides) continue;
//
for (j = 0; j < brush2->numsides; j++)
{
side2 = &brush2->sides[j];
//don't check the "shared" sides
for (n = 0; n < brush1->numsides; n++)
{
side1 = &brush1->sides[n];
if (side1->planenum == (side2->planenum^1)) break;
} //end for
if (n < brush1->numsides) continue;
//
side1 = &brush1->sides[i];
//if the side is in the same plane
//*
if (side1->planenum == side2->planenum)
{
if (side1->texinfo != TEXINFO_NODE &&
side2->texinfo != TEXINFO_NODE &&
side1->texinfo != side2->texinfo) return NULL;
continue;
} //end if
//
plane1 = &mapplanes[side1->planenum];
plane2 = &mapplanes[side2->planenum];
//
if (WindingsNonConvex(side1->winding, side2->winding,
plane1->normal, plane2->normal,
plane1->dist, plane2->dist))
{
return NULL;
} //end if
} //end for
} //end for
newbrush = AllocBrush(brush1->numsides + brush2->numsides);
newbrush->original = brush1->original;
newbrush->numsides = 0;
//newbrush->side = brush1->side; //brush contents
//fix texinfos for sides lying in the same plane
for (i = 0; i < brush1->numsides; i++)
{
side1 = &brush1->sides[i];
//
for (n = 0; n < brush2->numsides; n++)
{
side2 = &brush2->sides[n];
//if both sides are in the same plane get the texinfo right
if (side1->planenum == side2->planenum)
{
if (side1->texinfo == TEXINFO_NODE) side1->texinfo = side2->texinfo;
if (side2->texinfo == TEXINFO_NODE) side2->texinfo = side1->texinfo;
} //end if
} //end for
} //end for
//
for (i = 0; i < brush1->numsides; i++)
{
side1 = &brush1->sides[i];
//don't add the "shared" sides
for (n = 0; n < brush2->numsides; n++)
{
side2 = &brush2->sides[n];
if (side1->planenum == (side2->planenum ^ 1)) break;
} //end for
if (n < brush2->numsides) continue;
//
for (n = 0; n < newbrush->numsides; n++)
{
cs = &newbrush->sides[n];
if (cs->planenum == side1->planenum)
{
Log_Print("brush duplicate plane\n");
break;
} //end if
} //end if
if (n < newbrush->numsides) continue;
//add this side
cs = &newbrush->sides[newbrush->numsides];
newbrush->numsides++;
*cs = *side1;
} //end for
for (j = 0; j < brush2->numsides; j++)
{
side2 = &brush2->sides[j];
for (n = 0; n < brush1->numsides; n++)
{
side1 = &brush1->sides[n];
//if the side is in the same plane
if (side2->planenum == side1->planenum) break;
//don't add the "shared" sides
if (side2->planenum == (side1->planenum ^ 1)) break;
} //end for
if (n < brush1->numsides) continue;
//
for (n = 0; n < newbrush->numsides; n++)
{
cs = &newbrush->sides[n];
if (cs->planenum == side2->planenum)
{
Log_Print("brush duplicate plane\n");
break;
} //end if
} //end if
if (n < newbrush->numsides) continue;
//add this side
cs = &newbrush->sides[newbrush->numsides];
newbrush->numsides++;
*cs = *side2;
} //end for
BSPBrushWindings(newbrush);
BoundBrush(newbrush);
CheckBSPBrush(newbrush);
return newbrush;
} //end of the function TryMergeBrushes
/**
* @brief Generates two new brushes, leaving the original unchanged
*/
void SplitBrush (const bspbrush_t* brush, uint16_t planenum, bspbrush_t** front, bspbrush_t** back)
{
bspbrush_t* b[2];
int i, j;
winding_t* w, *cw[2], *midwinding;
plane_t* plane;
float d_front, d_back;
*front = *back = nullptr;
plane = &mapplanes[planenum];
/* check all points */
d_front = d_back = 0;
for (i = 0; i < brush->numsides; i++) {
w = brush->sides[i].winding;
if (!w)
continue;
for (j = 0; j < w->numpoints; j++) {
const float d = DotProduct(w->p[j], plane->normal) - plane->dist;
if (d > 0 && d > d_front)
d_front = d;
else if (d < 0 && d < d_back)
d_back = d;
}
}
if (d_front < 0.1) { /* PLANESIDE_EPSILON) */
/* only on back */
*back = CopyBrush(brush);
return;
}
if (d_back > -0.1) { /* PLANESIDE_EPSILON) */
/* only on front */
*front = CopyBrush(brush);
return;
}
/* create a new winding from the split plane */
w = BaseWindingForPlane(plane->normal, plane->dist);
for (i = 0; i < brush->numsides && w; i++) {
plane_t* plane2 = &mapplanes[brush->sides[i].planenum ^ 1];
ChopWindingInPlace(&w, plane2->normal, plane2->dist, 0); /* PLANESIDE_EPSILON); */
}
/* the brush isn't really split */
if (!w || WindingIsTiny(w)) {
const int side = BrushMostlyOnSide(brush, plane);
if (side == PSIDE_FRONT)
*front = CopyBrush(brush);
else if (side == PSIDE_BACK)
*back = CopyBrush(brush);
return;
}
if (WindingIsHuge(w)) {
/** @todo Print brush and entnum either of the brush that was splitted
* or the plane that was used as splitplane */
Com_Printf("WARNING: Large winding\n");
}
midwinding = w;
/* split it for real */
for (i = 0; i < 2; i++) {
b[i] = AllocBrush(brush->numsides + 1);
b[i]->original = brush->original;
}
/* split all the current windings */
for (i = 0; i < brush->numsides; i++) {
const side_t* s = &brush->sides[i];
w = s->winding;
if (!w)
continue;
ClipWindingEpsilon(w, plane->normal, plane->dist,
0 /*PLANESIDE_EPSILON*/, &cw[0], &cw[1]);
for (j = 0; j < 2; j++) {
side_t* cs;
if (!cw[j])
continue;
cs = &b[j]->sides[b[j]->numsides];
b[j]->numsides++;
*cs = *s;
cs->winding = cw[j];
cs->tested = false;
}
}
/* see if we have valid polygons on both sides */
for (i = 0; i < 2; i++) {
BoundBrush(b[i]);
for (j = 0; j < 3; j++) {
if (b[i]->mins[j] < -MAX_WORLD_WIDTH || b[i]->maxs[j] > MAX_WORLD_WIDTH) {
/** @todo Print brush and entnum either of the brush that was split
* or the plane that was used as splitplane */
Verb_Printf(VERB_EXTRA, "bogus brush after clip\n");
break;
}
}
if (b[i]->numsides < 3 || j < 3) {
FreeBrush(b[i]);
b[i] = nullptr;
}
}
if (!(b[0] && b[1])) {
/** @todo Print brush and entnum either of the brush that was splitted
* or the plane that was used as splitplane */
if (!b[0] && !b[1])
Verb_Printf(VERB_EXTRA, "split removed brush\n");
else
Verb_Printf(VERB_EXTRA, "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++) {
side_t* cs = &b[i]->sides[b[i]->numsides];
b[i]->numsides++;
cs->planenum = planenum ^ i ^ 1;
cs->texinfo = TEXINFO_NODE;
cs->visible = false;
cs->tested = false;
if (i == 0)
cs->winding = CopyWinding(midwinding);
else
cs->winding = midwinding;
}
for (i = 0; i < 2; i++) {
const vec_t v1 = BrushVolume(b[i]);
if (v1 < 1.0) {
FreeBrush(b[i]);
b[i] = nullptr;
/** @todo Print brush and entnum either of the brush that was splitted
* or the plane that was used as splitplane */
Verb_Printf(VERB_EXTRA, "tiny volume after clip\n");
}
}
*front = b[0];
*back = b[1];
}
//===========================================================================
// Generates two new brushes, leaving the original
// unchanged
//
// modified for Half-Life because there are quite a lot of tiny node leaves
// in the Half-Life bsps
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void Q1_SplitBrush(bspbrush_t *brush, int planenum, int nodenum,
bspbrush_t **front, bspbrush_t **back)
{
bspbrush_t *b[2];
int i, j;
winding_t *w, *cw[2], *midwinding;
plane_t *plane, *plane2;
side_t *s, *cs;
float d, d_front, d_back;
*front = *back = NULL;
plane = &mapplanes[planenum];
// check all points
d_front = d_back = 0;
for (i=0 ; i<brush->numsides ; i++)
{
w = brush->sides[i].winding;
if (!w)
continue;
for (j=0 ; j<w->numpoints ; j++)
{
d = DotProduct (w->p[j], plane->normal) - plane->dist;
if (d > 0 && d > d_front)
d_front = d;
if (d < 0 && d < d_back)
d_back = d;
} //end for
} //end for
if (d_front < 0.1) // PLANESIDE_EPSILON)
{ // only on back
*back = CopyBrush (brush);
Log_Print("Q1_SplitBrush: only on back\n");
return;
} //end if
if (d_back > -0.1) // PLANESIDE_EPSILON)
{ // only on front
*front = CopyBrush (brush);
Log_Print("Q1_SplitBrush: only on front\n");
return;
} //end if
// create a new winding from the split plane
w = BaseWindingForPlane (plane->normal, plane->dist);
for (i = 0; i < brush->numsides && w; i++)
{
plane2 = &mapplanes[brush->sides[i].planenum ^ 1];
ChopWindingInPlace(&w, plane2->normal, plane2->dist, 0); // PLANESIDE_EPSILON);
} //end for
if (!w || WindingIsTiny(w))
{ // the brush isn't really split
int side;
Log_Print("Q1_SplitBrush: no split winding\n");
side = BrushMostlyOnSide (brush, plane);
if (side == PSIDE_FRONT)
*front = CopyBrush (brush);
if (side == PSIDE_BACK)
*back = CopyBrush (brush);
return;
}
if (WindingIsHuge(w))
{
Log_Print("Q1_SplitBrush: WARNING huge split winding\n");
} //end of
midwinding = w;
// split it for real
for (i = 0; i < 2; i++)
{
b[i] = AllocBrush (brush->numsides+1);
b[i]->original = brush->original;
} //end for
// split all the current windings
for (i=0 ; i<brush->numsides ; i++)
{
s = &brush->sides[i];
w = s->winding;
if (!w)
continue;
ClipWindingEpsilon (w, plane->normal, plane->dist,
0 /*PLANESIDE_EPSILON*/, &cw[0], &cw[1]);
for (j=0 ; j<2 ; j++)
{
if (!cw[j])
continue;
#if 0
if (WindingIsTiny (cw[j]))
{
FreeWinding (cw[j]);
continue;
}
#endif
cs = &b[j]->sides[b[j]->numsides];
b[j]->numsides++;
*cs = *s;
// cs->planenum = s->planenum;
// cs->texinfo = s->texinfo;
// cs->visible = s->visible;
// cs->original = s->original;
cs->winding = cw[j];
cs->flags &= ~SFL_TESTED;
} //end for
} //end for
// see if we have valid polygons on both sides
for (i=0 ; i<2 ; i++)
{
BoundBrush (b[i]);
for (j=0 ; j<3 ; j++)
{
if (b[i]->mins[j] < -4096 || b[i]->maxs[j] > 4096)
{
Log_Print("Q1_SplitBrush: bogus brush after clip\n");
break;
} //end if
} //end for
if (b[i]->numsides < 3 || j < 3)
{
FreeBrush (b[i]);
b[i] = NULL;
Log_Print("Q1_SplitBrush: numsides < 3\n");
} //end if
} //end for
if ( !(b[0] && b[1]) )
{
if (!b[0] && !b[1])
Log_Print("Q1_SplitBrush: split removed brush\n");
else
Log_Print("Q1_SplitBrush: split not on both sides\n");
if (b[0])
{
FreeBrush (b[0]);
*front = CopyBrush (brush);
} //end if
if (b[1])
{
FreeBrush (b[1]);
*back = CopyBrush (brush);
} //end if
return;
} //end if
// 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->texinfo = 0;
//store the node number in the surf to find the texinfo later on
cs->surf = nodenum;
//
cs->flags &= ~SFL_VISIBLE;
cs->flags &= ~SFL_TESTED;
cs->flags &= ~SFL_TEXTURED;
if (i==0)
cs->winding = CopyWinding (midwinding);
else
cs->winding = midwinding;
} //end for
{
vec_t v1;
int i;
for (i=0 ; i<2 ; i++)
{
v1 = BrushVolume (b[i]);
if (v1 < 1)
{
FreeBrush (b[i]);
b[i] = NULL;
Log_Print("Q1_SplitBrush: tiny volume after clip\n");
} //end if
} //end for
} //*/
*front = b[0];
*back = b[1];
} //end of the function Q1_SplitBrush
