ref: bea7b7bf8ccbc2bc41906517079e76fcfb31cb5a
dir: /code/bspc/tree.c/
/*
===========================================================================
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"
extern int c_nodes;
int c_pruned;
int freedtreemem = 0;
void RemovePortalFromNode (portal_t *portal, node_t *l);
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
node_t *NodeForPoint (node_t *node, vec3_t origin)
{
plane_t *plane;
vec_t d;
while (node->planenum != PLANENUM_LEAF)
{
plane = &mapplanes[node->planenum];
d = DotProduct (origin, plane->normal) - plane->dist;
if (d >= 0)
node = node->children[0];
else
node = node->children[1];
}
return node;
} //end of the function NodeForPoint
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void Tree_FreePortals_r (node_t *node)
{
portal_t *p, *nextp;
int s;
// free children
if (node->planenum != PLANENUM_LEAF)
{
Tree_FreePortals_r(node->children[0]);
Tree_FreePortals_r(node->children[1]);
}
// free portals
for (p = node->portals; p; p = nextp)
{
s = (p->nodes[1] == node);
nextp = p->next[s];
RemovePortalFromNode (p, p->nodes[!s]);
#ifdef ME
if (p->winding) freedtreemem += MemorySize(p->winding);
freedtreemem += MemorySize(p);
#endif //ME
FreePortal(p);
}
node->portals = NULL;
} //end of the function Tree_FreePortals_r
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void Tree_Free_r (node_t *node)
{
// face_t *f, *nextf;
bspbrush_t *brush, *nextbrush;
//free children
if (node->planenum != PLANENUM_LEAF)
{
Tree_Free_r (node->children[0]);
Tree_Free_r (node->children[1]);
} //end if
//free bspbrushes
// FreeBrushList (node->brushlist);
for (brush = node->brushlist; brush; brush = nextbrush)
{
nextbrush = brush->next;
#ifdef ME
freedtreemem += MemorySize(brush);
#endif //ME
FreeBrush(brush);
} //end for
node->brushlist = NULL;
/*
NOTE: only used when creating Q2 bsp
// free faces
for (f = node->faces; f; f = nextf)
{
nextf = f->next;
#ifdef ME
if (f->w) freedtreemem += MemorySize(f->w);
freedtreemem += sizeof(face_t);
#endif //ME
FreeFace(f);
} //end for
*/
// free the node
if (node->volume)
{
#ifdef ME
freedtreemem += MemorySize(node->volume);
#endif //ME
FreeBrush (node->volume);
} //end if
if (numthreads == 1) c_nodes--;
#ifdef ME
freedtreemem += MemorySize(node);
#endif //ME
FreeMemory(node);
} //end of the function Tree_Free_r
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void Tree_Free(tree_t *tree)
{
//if no tree just return
if (!tree) return;
//
freedtreemem = 0;
//
Tree_FreePortals_r(tree->headnode);
Tree_Free_r(tree->headnode);
#ifdef ME
freedtreemem += MemorySize(tree);
#endif //ME
FreeMemory(tree);
#ifdef ME
Log_Print("freed ");
PrintMemorySize(freedtreemem);
Log_Print(" of tree memory\n");
#endif //ME
} //end of the function Tree_Free
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
tree_t *Tree_Alloc(void)
{
tree_t *tree;
tree = GetMemory(sizeof(*tree));
memset (tree, 0, sizeof(*tree));
ClearBounds (tree->mins, tree->maxs);
return tree;
} //end of the function Tree_Alloc
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void Tree_Print_r (node_t *node, int depth)
{
int i;
plane_t *plane;
bspbrush_t *bb;
for (i=0 ; i<depth ; i++)
printf (" ");
if (node->planenum == PLANENUM_LEAF)
{
if (!node->brushlist)
printf ("NULL\n");
else
{
for (bb=node->brushlist ; bb ; bb=bb->next)
printf ("%i ", bb->original->brushnum);
printf ("\n");
}
return;
}
plane = &mapplanes[node->planenum];
printf ("#%i (%5.2f %5.2f %5.2f):%5.2f\n", node->planenum,
plane->normal[0], plane->normal[1], plane->normal[2],
plane->dist);
Tree_Print_r (node->children[0], depth+1);
Tree_Print_r (node->children[1], depth+1);
} //end of the function Tree_Print_r
//===========================================================================
// NODES THAT DON'T SEPERATE DIFFERENT CONTENTS CAN BE PRUNED
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void Tree_PruneNodes_r (node_t *node)
{
bspbrush_t *b, *next;
if (node->planenum == PLANENUM_LEAF) return;
Tree_PruneNodes_r (node->children[0]);
Tree_PruneNodes_r (node->children[1]);
if (create_aas)
{
if ((node->children[0]->contents & CONTENTS_LADDER) ||
(node->children[1]->contents & CONTENTS_LADDER)) return;
}
if ((node->children[0]->contents & CONTENTS_SOLID)
&& (node->children[1]->contents & CONTENTS_SOLID))
{
if (node->faces)
Error ("node->faces seperating CONTENTS_SOLID");
if (node->children[0]->faces || node->children[1]->faces)
Error ("!node->faces with children");
// FIXME: free stuff
node->planenum = PLANENUM_LEAF;
node->contents = CONTENTS_SOLID;
node->detail_seperator = false;
if (node->brushlist)
Error ("PruneNodes: node->brushlist");
// combine brush lists
node->brushlist = node->children[1]->brushlist;
for (b = node->children[0]->brushlist; b; b = next)
{
next = b->next;
b->next = node->brushlist;
node->brushlist = b;
} //end for
//free the child nodes
FreeMemory(node->children[0]);
FreeMemory(node->children[1]);
//two nodes are cut away
c_pruned += 2;
} //end if
} //end of the function Tree_PruneNodes_r
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void Tree_PruneNodes(node_t *node)
{
Log_Print("------- Prune Nodes --------\n");
c_pruned = 0;
Tree_PruneNodes_r(node);
Log_Print("%5i pruned nodes\n", c_pruned);
} //end of the function Tree_PruneNodes