/*
============
idBrushBSPNode::idBrushBSPNode
============
*/
idBrushBSPNode::idBrushBSPNode( void ) {
brushList.Clear();
contents = 0;
flags = 0;
volume = NULL;
portals = NULL;
parent = NULL;
children[0] = children[1] = NULL;
areaNum = 0;
occupied = 0;
plane = idPlane( 0.f, 0.f, 0.f, 0.f );
}
// and facing the apropriate direction
static byte *faceCastsShadow;
static int *remap;
#define MAX_SHADOW_INDEXES 0x18000
#define MAX_SHADOW_VERTS 0x18000
static int numShadowIndexes;
static glIndex_t shadowIndexes[MAX_SHADOW_INDEXES];
static int numShadowVerts;
static idVec4 shadowVerts[MAX_SHADOW_VERTS];
static bool overflowed;
idPlane pointLightFrustums[6][6] = {
{
idPlane( 1,0,0,0 ),
idPlane( 1,1,0,0 ),
idPlane( 1,-1,0,0 ),
idPlane( 1,0,1,0 ),
idPlane( 1,0,-1,0 ),
idPlane( -1,0,0,0 ),
},
{
idPlane( -1,0,0,0 ),
idPlane( -1,1,0,0 ),
idPlane( -1,-1,0,0 ),
idPlane( -1,0,1,0 ),
idPlane( -1,0,-1,0 ),
idPlane( 1,0,0,0 ),
},
/*
============
idBrush::Split
============
*/
int idBrush::Split( const idPlane& plane, int planeNum, idBrush** front, idBrush** back ) const
{
int res, i, j;
idBrushSide* side, *frontSide, *backSide;
float dist, maxBack, maxFront, *maxBackWinding, *maxFrontWinding;
idWinding* w, *mid;
assert( windingsValid );
if( front )
{
*front = NULL;
}
if( back )
{
*back = NULL;
}
res = bounds.PlaneSide( plane, -BRUSH_EPSILON );
if( res == PLANESIDE_FRONT )
{
if( front )
{
*front = Copy();
}
return res;
}
if( res == PLANESIDE_BACK )
{
if( back )
{
*back = Copy();
}
return res;
}
maxBackWinding = ( float* ) _alloca16( sides.Num() * sizeof( float ) );
maxFrontWinding = ( float* ) _alloca16( sides.Num() * sizeof( float ) );
maxFront = maxBack = 0.0f;
for( i = 0; i < sides.Num(); i++ )
{
side = sides[i];
w = side->winding;
if( !w )
{
continue;
}
maxBackWinding[i] = 10.0f;
maxFrontWinding[i] = -10.0f;
for( j = 0; j < w->GetNumPoints(); j++ )
{
dist = plane.Distance( ( *w )[j].ToVec3() );
if( dist > maxFrontWinding[i] )
{
maxFrontWinding[i] = dist;
}
if( dist < maxBackWinding[i] )
{
maxBackWinding[i] = dist;
}
}
if( maxFrontWinding[i] > maxFront )
{
maxFront = maxFrontWinding[i];
}
if( maxBackWinding[i] < maxBack )
{
maxBack = maxBackWinding[i];
}
}
if( maxFront < BRUSH_EPSILON )
{
if( back )
{
*back = Copy();
}
return PLANESIDE_BACK;
}
if( maxBack > -BRUSH_EPSILON )
{
if( front )
{
*front = Copy();
}
return PLANESIDE_FRONT;
}
mid = new idWinding( plane.Normal(), plane.Dist() );
for( i = 0; i < sides.Num() && mid; i++ )
{
mid = mid->Clip( -sides[i]->plane, BRUSH_EPSILON, false );
}
if( mid )
{
if( mid->IsTiny() )
{
delete mid;
mid = NULL;
}
else if( mid->IsHuge() )
{
// if the winding is huge then the brush is unbounded
common->Warning( "brush %d on entity %d is unbounded"
"( %1.2f %1.2f %1.2f )-( %1.2f %1.2f %1.2f )-( %1.2f %1.2f %1.2f )", primitiveNum, entityNum,
bounds[0][0], bounds[0][1], bounds[0][2], bounds[1][0], bounds[1][1], bounds[1][2],
bounds[1][0] - bounds[0][0], bounds[1][1] - bounds[0][1], bounds[1][2] - bounds[0][2] );
delete mid;
mid = NULL;
}
}
if( !mid )
{
if( maxFront > - maxBack )
{
if( front )
{
*front = Copy();
}
return PLANESIDE_FRONT;
}
else
{
if( back )
{
*back = Copy();
}
return PLANESIDE_BACK;
}
}
if( !front && !back )
{
delete mid;
return PLANESIDE_CROSS;
}
*front = new idBrush();
( *front )->SetContents( contents );
( *front )->SetEntityNum( entityNum );
( *front )->SetPrimitiveNum( primitiveNum );
*back = new idBrush();
( *back )->SetContents( contents );
( *back )->SetEntityNum( entityNum );
( *back )->SetPrimitiveNum( primitiveNum );
for( i = 0; i < sides.Num(); i++ )
{
side = sides[i];
if( !side->winding )
{
continue;
}
// if completely at the front
if( maxBackWinding[i] >= BRUSH_EPSILON )
{
( *front )->sides.Append( side->Copy() );
}
// if completely at the back
else if( maxFrontWinding[i] <= -BRUSH_EPSILON )
{
( *back )->sides.Append( side->Copy() );
}
else
{
// split the side
side->Split( plane, &frontSide, &backSide );
if( frontSide )
{
( *front )->sides.Append( frontSide );
}
else if( maxFrontWinding[i] > -BRUSH_EPSILON )
{
// favor an overconstrained brush
side = side->Copy();
side->winding = side->winding->Clip( idPlane( plane.Normal(), ( plane.Dist() - ( BRUSH_EPSILON + 0.02f ) ) ), 0.01f, true );
assert( side->winding );
( *front )->sides.Append( side );
}
if( backSide )
{
( *back )->sides.Append( backSide );
}
else if( maxBackWinding[i] < BRUSH_EPSILON )
{
// favor an overconstrained brush
side = side->Copy();
side->winding = side->winding->Clip( idPlane( -plane.Normal(), -( plane.Dist() + ( BRUSH_EPSILON + 0.02f ) ) ), 0.01f, true );
assert( side->winding );
( *back )->sides.Append( side );
}
}
}
side = new idBrushSide( -plane, planeNum ^ 1 );
side->winding = mid->Reverse();
side->flags |= SFL_SPLIT;
( *front )->sides.Append( side );
( *front )->windingsValid = true;
( *front )->BoundBrush( this );
side = new idBrushSide( plane, planeNum );
side->winding = mid;
side->flags |= SFL_SPLIT;
( *back )->sides.Append( side );
( *back )->windingsValid = true;
( *back )->BoundBrush( this );
return PLANESIDE_CROSS;
}
