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- /*
- ===========================================================================
- Copyright (C) 1997-2006 Id Software, Inc.
- This file is part of Quake 2 Tools source code.
- Quake 2 Tools 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 2 Tools 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 Quake 2 Tools source code; if not, write to the Free Software
- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- ===========================================================================
- */
- #include "qbsp.h"
- /*
- ==============================================================================
- PORTAL FILE GENERATION
- Save out name.prt for qvis to read
- ==============================================================================
- */
- #define PORTALFILE "PRT1"
- FILE *pf;
- int num_visclusters; // clusters the player can be in
- int num_visportals;
- void WriteFloat (FILE *f, vec_t v)
- {
- if ( fabs(v - Q_rint(v)) < 0.001 )
- fprintf (f,"%i ",(int)Q_rint(v));
- else
- fprintf (f,"%f ",v);
- }
- /*
- =================
- WritePortalFile_r
- =================
- */
- void WritePortalFile_r (node_t *node)
- {
- int i, s;
- portal_t *p;
- winding_t *w;
- vec3_t normal;
- vec_t dist;
- // decision node
- if (node->planenum != PLANENUM_LEAF && !node->detail_seperator)
- {
- WritePortalFile_r (node->children[0]);
- WritePortalFile_r (node->children[1]);
- return;
- }
-
- if (node->contents & CONTENTS_SOLID)
- return;
- for (p = node->portals ; p ; p=p->next[s])
- {
- w = p->winding;
- s = (p->nodes[1] == node);
- if (w && p->nodes[0] == node)
- {
- if (!Portal_VisFlood (p))
- continue;
- // write out to the file
-
- // sometimes planes get turned around when they are very near
- // the changeover point between different axis. interpret the
- // plane the same way vis will, and flip the side orders if needed
- // FIXME: is this still relevent?
- WindingPlane (w, normal, &dist);
- if ( DotProduct (p->plane.normal, normal) < 0.99 )
- { // backwards...
- fprintf (pf,"%i %i %i ",w->numpoints, p->nodes[1]->cluster, p->nodes[0]->cluster);
- }
- else
- fprintf (pf,"%i %i %i ",w->numpoints, p->nodes[0]->cluster, p->nodes[1]->cluster);
- for (i=0 ; i<w->numpoints ; i++)
- {
- fprintf (pf,"(");
- WriteFloat (pf, w->p[i][0]);
- WriteFloat (pf, w->p[i][1]);
- WriteFloat (pf, w->p[i][2]);
- fprintf (pf,") ");
- }
- fprintf (pf,"\n");
- }
- }
- }
- /*
- ================
- FillLeafNumbers_r
- All of the leafs under node will have the same cluster
- ================
- */
- void FillLeafNumbers_r (node_t *node, int num)
- {
- if (node->planenum == PLANENUM_LEAF)
- {
- if (node->contents & CONTENTS_SOLID)
- node->cluster = -1;
- else
- node->cluster = num;
- return;
- }
- node->cluster = num;
- FillLeafNumbers_r (node->children[0], num);
- FillLeafNumbers_r (node->children[1], num);
- }
- /*
- ================
- NumberLeafs_r
- ================
- */
- void NumberLeafs_r (node_t *node)
- {
- portal_t *p;
- if (node->planenum != PLANENUM_LEAF && !node->detail_seperator)
- { // decision node
- node->cluster = -99;
- NumberLeafs_r (node->children[0]);
- NumberLeafs_r (node->children[1]);
- return;
- }
-
- // either a leaf or a detail cluster
- if ( node->contents & CONTENTS_SOLID )
- { // solid block, viewpoint never inside
- node->cluster = -1;
- return;
- }
- FillLeafNumbers_r (node, num_visclusters);
- num_visclusters++;
- // count the portals
- for (p = node->portals ; p ; )
- {
- if (p->nodes[0] == node) // only write out from first leaf
- {
- if (Portal_VisFlood (p))
- num_visportals++;
- p = p->next[0];
- }
- else
- p = p->next[1];
- }
- }
- /*
- ================
- CreateVisPortals_r
- ================
- */
- void CreateVisPortals_r (node_t *node)
- {
- // stop as soon as we get to a detail_seperator, which
- // means that everything below is in a single cluster
- if (node->planenum == PLANENUM_LEAF || node->detail_seperator )
- return;
- MakeNodePortal (node);
- SplitNodePortals (node);
- CreateVisPortals_r (node->children[0]);
- CreateVisPortals_r (node->children[1]);
- }
- /*
- ================
- FinishVisPortals_r
- ================
- */
- void FinishVisPortals2_r (node_t *node)
- {
- if (node->planenum == PLANENUM_LEAF)
- return;
- MakeNodePortal (node);
- SplitNodePortals (node);
- FinishVisPortals2_r (node->children[0]);
- FinishVisPortals2_r (node->children[1]);
- }
- void FinishVisPortals_r (node_t *node)
- {
- if (node->planenum == PLANENUM_LEAF)
- return;
- if (node->detail_seperator)
- {
- FinishVisPortals2_r (node);
- return;
- }
- FinishVisPortals_r (node->children[0]);
- FinishVisPortals_r (node->children[1]);
- }
- int clusterleaf;
- void SaveClusters_r (node_t *node)
- {
- if (node->planenum == PLANENUM_LEAF)
- {
- dleafs[clusterleaf++].cluster = node->cluster;
- return;
- }
- SaveClusters_r (node->children[0]);
- SaveClusters_r (node->children[1]);
- }
- /*
- ================
- WritePortalFile
- ================
- */
- void WritePortalFile (tree_t *tree)
- {
- char filename[1024];
- node_t *headnode;
- qprintf ("--- WritePortalFile ---\n");
- headnode = tree->headnode;
- num_visclusters = 0;
- num_visportals = 0;
- FreeTreePortals_r (headnode);
- MakeHeadnodePortals (tree);
- CreateVisPortals_r (headnode);
- // set the cluster field in every leaf and count the total number of portals
- NumberLeafs_r (headnode);
-
- // write the file
- sprintf (filename, "%s.prt", source);
- printf ("writing %s\n", filename);
- pf = fopen (filename, "w");
- if (!pf)
- Error ("Error opening %s", filename);
-
- fprintf (pf, "%s\n", PORTALFILE);
- fprintf (pf, "%i\n", num_visclusters);
- fprintf (pf, "%i\n", num_visportals);
- qprintf ("%5i visclusters\n", num_visclusters);
- qprintf ("%5i visportals\n", num_visportals);
- WritePortalFile_r (headnode);
- fclose (pf);
- // we need to store the clusters out now because ordering
- // issues made us do this after writebsp...
- clusterleaf = 1;
- SaveClusters_r (headnode);
- }
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