mirror of https://github.com/ioquake/ioq3.git
844 lines
16 KiB
C
Executable File
844 lines
16 KiB
C
Executable File
/*
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===========================================================================
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Copyright (C) 1999-2005 Id Software, Inc.
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This file is part of Quake III Arena source code.
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Quake III Arena source code is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Quake III Arena source code is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Foobar; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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===========================================================================
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*/
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#include "qbsp.h"
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int c_active_portals;
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int c_peak_portals;
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int c_boundary;
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int c_boundary_sides;
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/*
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===========
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AllocPortal
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===========
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*/
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portal_t *AllocPortal (void)
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{
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portal_t *p;
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if (numthreads == 1)
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c_active_portals++;
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if (c_active_portals > c_peak_portals)
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c_peak_portals = c_active_portals;
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p = malloc (sizeof(portal_t));
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memset (p, 0, sizeof(portal_t));
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return p;
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}
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void FreePortal (portal_t *p)
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{
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if (p->winding)
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FreeWinding (p->winding);
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if (numthreads == 1)
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c_active_portals--;
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free (p);
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}
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//==============================================================
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/*
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=============
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Portal_Passable
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Returns true if the portal has non-opaque leafs on both sides
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=============
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*/
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qboolean Portal_Passable(portal_t *p) {
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if (!p->onnode) {
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return qfalse; // to global outsideleaf
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}
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if (p->nodes[0]->planenum != PLANENUM_LEAF
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|| p->nodes[1]->planenum != PLANENUM_LEAF) {
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Error ("Portal_EntityFlood: not a leaf");
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}
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if ( !p->nodes[0]->opaque && !p->nodes[1]->opaque ) {
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return qtrue;
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}
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return qfalse;
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}
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//=============================================================================
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int c_tinyportals;
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/*
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=============
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AddPortalToNodes
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=============
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*/
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void AddPortalToNodes (portal_t *p, node_t *front, node_t *back)
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{
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if (p->nodes[0] || p->nodes[1])
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Error ("AddPortalToNode: allready included");
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p->nodes[0] = front;
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p->next[0] = front->portals;
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front->portals = p;
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p->nodes[1] = back;
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p->next[1] = back->portals;
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back->portals = p;
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}
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/*
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=============
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RemovePortalFromNode
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=============
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*/
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void RemovePortalFromNode (portal_t *portal, node_t *l)
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{
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portal_t **pp, *t;
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// remove reference to the current portal
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pp = &l->portals;
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while (1)
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{
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t = *pp;
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if (!t)
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Error ("RemovePortalFromNode: portal not in leaf");
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if ( t == portal )
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break;
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if (t->nodes[0] == l)
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pp = &t->next[0];
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else if (t->nodes[1] == l)
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pp = &t->next[1];
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else
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Error ("RemovePortalFromNode: portal not bounding leaf");
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}
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if (portal->nodes[0] == l)
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{
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*pp = portal->next[0];
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portal->nodes[0] = NULL;
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}
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else if (portal->nodes[1] == l)
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{
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*pp = portal->next[1];
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portal->nodes[1] = NULL;
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}
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}
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//============================================================================
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void PrintPortal (portal_t *p)
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{
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int i;
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winding_t *w;
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w = p->winding;
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for (i=0 ; i<w->numpoints ; i++)
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_printf ("(%5.0f,%5.0f,%5.0f)\n",w->p[i][0]
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, w->p[i][1], w->p[i][2]);
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}
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/*
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================
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MakeHeadnodePortals
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The created portals will face the global outside_node
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================
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*/
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#define SIDESPACE 8
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void MakeHeadnodePortals (tree_t *tree)
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{
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vec3_t bounds[2];
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int i, j, n;
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portal_t *p, *portals[6];
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plane_t bplanes[6], *pl;
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node_t *node;
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node = tree->headnode;
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// pad with some space so there will never be null volume leafs
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for (i=0 ; i<3 ; i++)
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{
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bounds[0][i] = tree->mins[i] - SIDESPACE;
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bounds[1][i] = tree->maxs[i] + SIDESPACE;
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if ( bounds[0][i] >= bounds[1][i] ) {
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Error( "Backwards tree volume" );
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}
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}
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tree->outside_node.planenum = PLANENUM_LEAF;
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tree->outside_node.brushlist = NULL;
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tree->outside_node.portals = NULL;
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tree->outside_node.opaque = qfalse;
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for (i=0 ; i<3 ; i++)
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for (j=0 ; j<2 ; j++)
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{
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n = j*3 + i;
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p = AllocPortal ();
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portals[n] = p;
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pl = &bplanes[n];
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memset (pl, 0, sizeof(*pl));
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if (j)
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{
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pl->normal[i] = -1;
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pl->dist = -bounds[j][i];
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}
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else
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{
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pl->normal[i] = 1;
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pl->dist = bounds[j][i];
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}
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p->plane = *pl;
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p->winding = BaseWindingForPlane (pl->normal, pl->dist);
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AddPortalToNodes (p, node, &tree->outside_node);
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}
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// clip the basewindings by all the other planes
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for (i=0 ; i<6 ; i++)
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{
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for (j=0 ; j<6 ; j++)
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{
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if (j == i)
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continue;
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ChopWindingInPlace (&portals[i]->winding, bplanes[j].normal, bplanes[j].dist, ON_EPSILON);
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}
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}
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}
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//===================================================
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/*
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================
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BaseWindingForNode
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================
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*/
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#define BASE_WINDING_EPSILON 0.001
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#define SPLIT_WINDING_EPSILON 0.001
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winding_t *BaseWindingForNode (node_t *node)
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{
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winding_t *w;
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node_t *n;
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plane_t *plane;
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vec3_t normal;
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vec_t dist;
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w = BaseWindingForPlane (mapplanes[node->planenum].normal
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, mapplanes[node->planenum].dist);
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// clip by all the parents
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for (n=node->parent ; n && w ; )
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{
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plane = &mapplanes[n->planenum];
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if (n->children[0] == node)
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{ // take front
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ChopWindingInPlace (&w, plane->normal, plane->dist, BASE_WINDING_EPSILON);
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}
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else
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{ // take back
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VectorSubtract (vec3_origin, plane->normal, normal);
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dist = -plane->dist;
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ChopWindingInPlace (&w, normal, dist, BASE_WINDING_EPSILON);
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}
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node = n;
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n = n->parent;
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}
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return w;
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}
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//============================================================
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/*
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==================
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MakeNodePortal
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create the new portal by taking the full plane winding for the cutting plane
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and clipping it by all of parents of this node
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==================
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*/
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void MakeNodePortal (node_t *node)
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{
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portal_t *new_portal, *p;
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winding_t *w;
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vec3_t normal;
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float dist;
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int side;
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w = BaseWindingForNode (node);
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// clip the portal by all the other portals in the node
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for (p = node->portals ; p && w; p = p->next[side])
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{
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if (p->nodes[0] == node)
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{
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side = 0;
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VectorCopy (p->plane.normal, normal);
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dist = p->plane.dist;
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}
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else if (p->nodes[1] == node)
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{
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side = 1;
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VectorSubtract (vec3_origin, p->plane.normal, normal);
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dist = -p->plane.dist;
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}
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else
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Error ("CutNodePortals_r: mislinked portal");
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ChopWindingInPlace (&w, normal, dist, CLIP_EPSILON);
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}
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if (!w)
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{
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return;
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}
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if (WindingIsTiny (w))
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{
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c_tinyportals++;
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FreeWinding (w);
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return;
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}
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new_portal = AllocPortal ();
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new_portal->plane = mapplanes[node->planenum];
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new_portal->onnode = node;
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new_portal->winding = w;
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new_portal->hint = node->hint;
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AddPortalToNodes (new_portal, node->children[0], node->children[1]);
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}
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/*
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==============
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SplitNodePortals
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Move or split the portals that bound node so that the node's
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children have portals instead of node.
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==============
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*/
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void SplitNodePortals (node_t *node)
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{
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portal_t *p, *next_portal, *new_portal;
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node_t *f, *b, *other_node;
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int side;
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plane_t *plane;
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winding_t *frontwinding, *backwinding;
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plane = &mapplanes[node->planenum];
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f = node->children[0];
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b = node->children[1];
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for (p = node->portals ; p ; p = next_portal)
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{
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if (p->nodes[0] == node)
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side = 0;
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else if (p->nodes[1] == node)
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side = 1;
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else
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Error ("SplitNodePortals: mislinked portal");
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next_portal = p->next[side];
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other_node = p->nodes[!side];
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RemovePortalFromNode (p, p->nodes[0]);
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RemovePortalFromNode (p, p->nodes[1]);
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//
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// cut the portal into two portals, one on each side of the cut plane
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//
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ClipWindingEpsilon (p->winding, plane->normal, plane->dist,
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SPLIT_WINDING_EPSILON, &frontwinding, &backwinding);
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if (frontwinding && WindingIsTiny(frontwinding))
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{
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if (!f->tinyportals)
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VectorCopy(frontwinding->p[0], f->referencepoint);
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f->tinyportals++;
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if (!other_node->tinyportals)
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VectorCopy(frontwinding->p[0], other_node->referencepoint);
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other_node->tinyportals++;
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FreeWinding (frontwinding);
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frontwinding = NULL;
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c_tinyportals++;
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}
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if (backwinding && WindingIsTiny(backwinding))
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{
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if (!b->tinyportals)
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VectorCopy(backwinding->p[0], b->referencepoint);
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b->tinyportals++;
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if (!other_node->tinyportals)
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VectorCopy(backwinding->p[0], other_node->referencepoint);
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other_node->tinyportals++;
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FreeWinding (backwinding);
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backwinding = NULL;
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c_tinyportals++;
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}
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if (!frontwinding && !backwinding)
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{ // tiny windings on both sides
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continue;
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}
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if (!frontwinding)
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{
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FreeWinding (backwinding);
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if (side == 0)
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AddPortalToNodes (p, b, other_node);
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else
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AddPortalToNodes (p, other_node, b);
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continue;
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}
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if (!backwinding)
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{
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FreeWinding (frontwinding);
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if (side == 0)
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AddPortalToNodes (p, f, other_node);
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else
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AddPortalToNodes (p, other_node, f);
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continue;
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}
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// the winding is split
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new_portal = AllocPortal ();
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*new_portal = *p;
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new_portal->winding = backwinding;
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FreeWinding (p->winding);
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p->winding = frontwinding;
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if (side == 0)
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{
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AddPortalToNodes (p, f, other_node);
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AddPortalToNodes (new_portal, b, other_node);
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}
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else
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{
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AddPortalToNodes (p, other_node, f);
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AddPortalToNodes (new_portal, other_node, b);
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}
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}
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node->portals = NULL;
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}
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/*
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================
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CalcNodeBounds
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================
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*/
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void CalcNodeBounds (node_t *node)
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{
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portal_t *p;
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int s;
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int i;
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// calc mins/maxs for both leafs and nodes
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ClearBounds (node->mins, node->maxs);
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for (p = node->portals ; p ; p = p->next[s])
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{
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s = (p->nodes[1] == node);
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for (i=0 ; i<p->winding->numpoints ; i++)
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AddPointToBounds (p->winding->p[i], node->mins, node->maxs);
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}
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}
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/*
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==================
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MakeTreePortals_r
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==================
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*/
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void MakeTreePortals_r (node_t *node)
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{
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int i;
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CalcNodeBounds (node);
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if (node->mins[0] >= node->maxs[0])
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{
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_printf ("WARNING: node without a volume\n");
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_printf("node has %d tiny portals\n", node->tinyportals);
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_printf("node reference point %1.2f %1.2f %1.2f\n", node->referencepoint[0],
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node->referencepoint[1],
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node->referencepoint[2]);
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}
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for (i=0 ; i<3 ; i++)
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{
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if (node->mins[i] < MIN_WORLD_COORD || node->maxs[i] > MAX_WORLD_COORD)
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{
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_printf ("WARNING: node with unbounded volume\n");
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break;
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}
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}
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if (node->planenum == PLANENUM_LEAF)
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return;
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MakeNodePortal (node);
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SplitNodePortals (node);
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MakeTreePortals_r (node->children[0]);
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MakeTreePortals_r (node->children[1]);
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}
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|
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/*
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==================
|
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MakeTreePortals
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==================
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*/
|
|
void MakeTreePortals (tree_t *tree)
|
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{
|
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qprintf( "----- MakeTreePortals -----\n");
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MakeHeadnodePortals (tree);
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MakeTreePortals_r (tree->headnode);
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qprintf("%6d tiny portals\n", c_tinyportals);
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}
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|
|
/*
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=========================================================
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FLOOD ENTITIES
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|
|
=========================================================
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|
*/
|
|
|
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int c_floodedleafs;
|
|
|
|
/*
|
|
=============
|
|
FloodPortals_r
|
|
=============
|
|
*/
|
|
void FloodPortals_r (node_t *node, int dist) {
|
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portal_t *p;
|
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int s;
|
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|
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if ( node->occupied ) {
|
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return;
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}
|
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|
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if ( node->opaque ) {
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return;
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}
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|
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c_floodedleafs++;
|
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node->occupied = dist;
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|
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for (p=node->portals ; p ; p = p->next[s]) {
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s = (p->nodes[1] == node);
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FloodPortals_r (p->nodes[!s], dist+1);
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}
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}
|
|
|
|
/*
|
|
=============
|
|
PlaceOccupant
|
|
=============
|
|
*/
|
|
qboolean PlaceOccupant (node_t *headnode, vec3_t origin, entity_t *occupant)
|
|
{
|
|
node_t *node;
|
|
vec_t d;
|
|
plane_t *plane;
|
|
|
|
// find the leaf to start in
|
|
node = headnode;
|
|
while (node->planenum != PLANENUM_LEAF)
|
|
{
|
|
plane = &mapplanes[node->planenum];
|
|
d = DotProduct (origin, plane->normal) - plane->dist;
|
|
if (d >= 0)
|
|
node = node->children[0];
|
|
else
|
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node = node->children[1];
|
|
}
|
|
|
|
if ( node->opaque )
|
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return qfalse;
|
|
node->occupant = occupant;
|
|
|
|
FloodPortals_r (node, 1);
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|
|
return qtrue;
|
|
}
|
|
|
|
/*
|
|
=============
|
|
FloodEntities
|
|
|
|
Marks all nodes that can be reached by entites
|
|
=============
|
|
*/
|
|
qboolean FloodEntities( tree_t *tree ) {
|
|
int i;
|
|
vec3_t origin;
|
|
const char *cl;
|
|
qboolean inside;
|
|
node_t *headnode;
|
|
|
|
headnode = tree->headnode;
|
|
qprintf ("--- FloodEntities ---\n");
|
|
inside = qfalse;
|
|
tree->outside_node.occupied = 0;
|
|
|
|
c_floodedleafs = 0;
|
|
for (i=1 ; i<num_entities ; i++)
|
|
{
|
|
GetVectorForKey (&entities[i], "origin", origin);
|
|
if (VectorCompare(origin, vec3_origin))
|
|
continue;
|
|
|
|
cl = ValueForKey (&entities[i], "classname");
|
|
|
|
origin[2] += 1; // so objects on floor are ok
|
|
|
|
if (PlaceOccupant (headnode, origin, &entities[i]))
|
|
inside = qtrue;
|
|
}
|
|
|
|
qprintf("%5i flooded leafs\n", c_floodedleafs );
|
|
|
|
if (!inside)
|
|
{
|
|
qprintf ("no entities in open -- no filling\n");
|
|
}
|
|
else if (tree->outside_node.occupied)
|
|
{
|
|
qprintf ("entity reached from outside -- no filling\n");
|
|
}
|
|
|
|
return (qboolean)(inside && !tree->outside_node.occupied);
|
|
}
|
|
|
|
/*
|
|
=========================================================
|
|
|
|
FLOOD AREAS
|
|
|
|
=========================================================
|
|
*/
|
|
|
|
int c_areas;
|
|
|
|
/*
|
|
=============
|
|
FloodAreas_r
|
|
=============
|
|
*/
|
|
void FloodAreas_r (node_t *node)
|
|
{
|
|
portal_t *p;
|
|
int s;
|
|
bspbrush_t *b;
|
|
|
|
if ( node->areaportal ) {
|
|
//
|
|
if ( node->area == -1 ) {
|
|
node->area = c_areas;
|
|
}
|
|
// this node is part of an area portal brush
|
|
b = node->brushlist->original;
|
|
|
|
// if the current area has allready touched this
|
|
// portal, we are done
|
|
if (b->portalareas[0] == c_areas || b->portalareas[1] == c_areas)
|
|
return;
|
|
|
|
// note the current area as bounding the portal
|
|
if (b->portalareas[1] != -1)
|
|
{
|
|
_printf ("WARNING: areaportal brush %i touches > 2 areas\n", b->brushnum );
|
|
return;
|
|
}
|
|
if (b->portalareas[0] != -1) {
|
|
b->portalareas[1] = c_areas;
|
|
} else {
|
|
b->portalareas[0] = c_areas;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
if (node->area != -1) {
|
|
return; // allready got it
|
|
}
|
|
if ( node->cluster == -1 ) {
|
|
return;
|
|
}
|
|
|
|
node->area = c_areas;
|
|
|
|
for (p=node->portals ; p ; p = p->next[s])
|
|
{
|
|
s = (p->nodes[1] == node);
|
|
|
|
if ( !Portal_Passable(p) )
|
|
continue;
|
|
|
|
FloodAreas_r (p->nodes[!s]);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
=============
|
|
FindAreas_r
|
|
|
|
Just decend the tree, and for each node that hasn't had an
|
|
area set, flood fill out from there
|
|
=============
|
|
*/
|
|
void FindAreas_r (node_t *node)
|
|
{
|
|
if (node->planenum != PLANENUM_LEAF)
|
|
{
|
|
FindAreas_r (node->children[0]);
|
|
FindAreas_r (node->children[1]);
|
|
return;
|
|
}
|
|
|
|
if (node->opaque)
|
|
return;
|
|
|
|
if (node->areaportal)
|
|
return;
|
|
|
|
if (node->area != -1)
|
|
return; // allready got it
|
|
|
|
FloodAreas_r (node);
|
|
c_areas++;
|
|
}
|
|
|
|
/*
|
|
=============
|
|
CheckAreas_r
|
|
=============
|
|
*/
|
|
void CheckAreas_r (node_t *node)
|
|
{
|
|
bspbrush_t *b;
|
|
|
|
if (node->planenum != PLANENUM_LEAF)
|
|
{
|
|
CheckAreas_r (node->children[0]);
|
|
CheckAreas_r (node->children[1]);
|
|
return;
|
|
}
|
|
|
|
if (node->opaque)
|
|
return;
|
|
|
|
if (node->cluster != -1)
|
|
if (node->area == -1)
|
|
_printf("WARNING: cluster %d has area set to -1\n", node->cluster);
|
|
if (node->areaportal)
|
|
{
|
|
b = node->brushlist->original;
|
|
|
|
// check if the areaportal touches two areas
|
|
if (b->portalareas[0] == -1 || b->portalareas[1] == -1)
|
|
_printf ("WARNING: areaportal brush %i doesn't touch two areas\n", b->brushnum);
|
|
}
|
|
}
|
|
|
|
/*
|
|
=============
|
|
FloodAreas
|
|
|
|
Mark each leaf with an area, bounded by CONTENTS_AREAPORTAL
|
|
=============
|
|
*/
|
|
void FloodAreas (tree_t *tree)
|
|
{
|
|
qprintf ("--- FloodAreas ---\n");
|
|
FindAreas_r( tree->headnode );
|
|
|
|
// check for areaportal brushes that don't touch two areas
|
|
CheckAreas_r( tree->headnode );
|
|
|
|
qprintf ("%5i areas\n", c_areas);
|
|
}
|
|
|
|
//======================================================
|
|
|
|
int c_outside;
|
|
int c_inside;
|
|
int c_solid;
|
|
|
|
void FillOutside_r (node_t *node)
|
|
{
|
|
if (node->planenum != PLANENUM_LEAF)
|
|
{
|
|
FillOutside_r (node->children[0]);
|
|
FillOutside_r (node->children[1]);
|
|
return;
|
|
}
|
|
|
|
// anything not reachable by an entity
|
|
// can be filled away
|
|
if (!node->occupied) {
|
|
if ( !node->opaque ) {
|
|
c_outside++;
|
|
node->opaque = qtrue;
|
|
} else {
|
|
c_solid++;
|
|
}
|
|
} else {
|
|
c_inside++;
|
|
}
|
|
|
|
}
|
|
|
|
/*
|
|
=============
|
|
FillOutside
|
|
|
|
Fill all nodes that can't be reached by entities
|
|
=============
|
|
*/
|
|
void FillOutside (node_t *headnode)
|
|
{
|
|
c_outside = 0;
|
|
c_inside = 0;
|
|
c_solid = 0;
|
|
qprintf ("--- FillOutside ---\n");
|
|
FillOutside_r (headnode);
|
|
qprintf ("%5i solid leafs\n", c_solid);
|
|
qprintf ("%5i leafs filled\n", c_outside);
|
|
qprintf ("%5i inside leafs\n", c_inside);
|
|
}
|
|
|
|
|
|
//==============================================================
|
|
|