--- /dev/null
+/*
+===========================================================================
+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"
+
+
+int c_active_portals;
+int c_peak_portals;
+int c_boundary;
+int c_boundary_sides;
+
+/*
+===========
+AllocPortal
+===========
+*/
+portal_t *AllocPortal (void)
+{
+ portal_t *p;
+
+ if (numthreads == 1)
+ c_active_portals++;
+ if (c_active_portals > c_peak_portals)
+ c_peak_portals = c_active_portals;
+
+ p = malloc (sizeof(portal_t));
+ memset (p, 0, sizeof(portal_t));
+
+ return p;
+}
+
+void FreePortal (portal_t *p)
+{
+ if (p->winding)
+ FreeWinding (p->winding);
+ if (numthreads == 1)
+ c_active_portals--;
+ free (p);
+}
+
+//==============================================================
+
+/*
+==============
+VisibleContents
+
+Returns the single content bit of the
+strongest visible content present
+==============
+*/
+int VisibleContents (int contents)
+{
+ int i;
+
+ for (i=1 ; i<=LAST_VISIBLE_CONTENTS ; i<<=1)
+ if (contents & i )
+ return i;
+
+ return 0;
+}
+
+
+/*
+===============
+ClusterContents
+===============
+*/
+int ClusterContents (node_t *node)
+{
+ int c1, c2, c;
+
+ if (node->planenum == PLANENUM_LEAF)
+ return node->contents;
+
+ c1 = ClusterContents(node->children[0]);
+ c2 = ClusterContents(node->children[1]);
+ c = c1|c2;
+
+ // a cluster may include some solid detail areas, but
+ // still be seen into
+ if ( ! (c1&CONTENTS_SOLID) || ! (c2&CONTENTS_SOLID) )
+ c &= ~CONTENTS_SOLID;
+ return c;
+}
+
+/*
+=============
+Portal_VisFlood
+
+Returns true if the portal is empty or translucent, allowing
+the PVS calculation to see through it.
+The nodes on either side of the portal may actually be clusters,
+not leafs, so all contents should be ored together
+=============
+*/
+qboolean Portal_VisFlood (portal_t *p)
+{
+ int c1, c2;
+
+ if (!p->onnode)
+ return false; // to global outsideleaf
+
+ c1 = ClusterContents(p->nodes[0]);
+ c2 = ClusterContents(p->nodes[1]);
+
+ if (!VisibleContents (c1^c2))
+ return true;
+
+ if (c1 & (CONTENTS_TRANSLUCENT|CONTENTS_DETAIL))
+ c1 = 0;
+ if (c2 & (CONTENTS_TRANSLUCENT|CONTENTS_DETAIL))
+ c2 = 0;
+
+ if ( (c1|c2) & CONTENTS_SOLID )
+ return false; // can't see through solid
+
+ if (! (c1 ^ c2))
+ return true; // identical on both sides
+
+ if (!VisibleContents (c1^c2))
+ return true;
+ return false;
+}
+
+
+/*
+===============
+Portal_EntityFlood
+
+The entity flood determines which areas are
+"outside" on the map, which are then filled in.
+Flowing from side s to side !s
+===============
+*/
+qboolean Portal_EntityFlood (portal_t *p, int s)
+{
+ if (p->nodes[0]->planenum != PLANENUM_LEAF
+ || p->nodes[1]->planenum != PLANENUM_LEAF)
+ Error ("Portal_EntityFlood: not a leaf");
+
+ // can never cross to a solid
+ if ( (p->nodes[0]->contents & CONTENTS_SOLID)
+ || (p->nodes[1]->contents & CONTENTS_SOLID) )
+ return false;
+
+ // can flood through everything else
+ return true;
+}
+
+
+//=============================================================================
+
+int c_tinyportals;
+
+/*
+=============
+AddPortalToNodes
+=============
+*/
+void AddPortalToNodes (portal_t *p, node_t *front, node_t *back)
+{
+ if (p->nodes[0] || p->nodes[1])
+ Error ("AddPortalToNode: allready included");
+
+ p->nodes[0] = front;
+ p->next[0] = front->portals;
+ front->portals = p;
+
+ p->nodes[1] = back;
+ p->next[1] = back->portals;
+ back->portals = p;
+}
+
+
+/*
+=============
+RemovePortalFromNode
+=============
+*/
+void RemovePortalFromNode (portal_t *portal, node_t *l)
+{
+ portal_t **pp, *t;
+
+// remove reference to the current portal
+ pp = &l->portals;
+ while (1)
+ {
+ t = *pp;
+ if (!t)
+ Error ("RemovePortalFromNode: portal not in leaf");
+
+ if ( t == portal )
+ break;
+
+ if (t->nodes[0] == l)
+ pp = &t->next[0];
+ else if (t->nodes[1] == l)
+ pp = &t->next[1];
+ else
+ Error ("RemovePortalFromNode: portal not bounding leaf");
+ }
+
+ if (portal->nodes[0] == l)
+ {
+ *pp = portal->next[0];
+ portal->nodes[0] = NULL;
+ }
+ else if (portal->nodes[1] == l)
+ {
+ *pp = portal->next[1];
+ portal->nodes[1] = NULL;
+ }
+}
+
+//============================================================================
+
+void PrintPortal (portal_t *p)
+{
+ int i;
+ winding_t *w;
+
+ w = p->winding;
+ for (i=0 ; i<w->numpoints ; i++)
+ printf ("(%5.0f,%5.0f,%5.0f)\n",w->p[i][0]
+ , w->p[i][1], w->p[i][2]);
+}
+
+/*
+================
+MakeHeadnodePortals
+
+The created portals will face the global outside_node
+================
+*/
+#define SIDESPACE 8
+void MakeHeadnodePortals (tree_t *tree)
+{
+ vec3_t bounds[2];
+ int i, j, n;
+ portal_t *p, *portals[6];
+ plane_t bplanes[6], *pl;
+ node_t *node;
+
+ node = tree->headnode;
+
+// pad with some space so there will never be null volume leafs
+ for (i=0 ; i<3 ; i++)
+ {
+ bounds[0][i] = tree->mins[i] - SIDESPACE;
+ bounds[1][i] = tree->maxs[i] + SIDESPACE;
+ }
+
+ tree->outside_node.planenum = PLANENUM_LEAF;
+ tree->outside_node.brushlist = NULL;
+ tree->outside_node.portals = NULL;
+ tree->outside_node.contents = 0;
+
+ for (i=0 ; i<3 ; i++)
+ for (j=0 ; j<2 ; j++)
+ {
+ n = j*3 + i;
+
+ p = AllocPortal ();
+ portals[n] = p;
+
+ pl = &bplanes[n];
+ memset (pl, 0, sizeof(*pl));
+ if (j)
+ {
+ pl->normal[i] = -1;
+ pl->dist = -bounds[j][i];
+ }
+ else
+ {
+ pl->normal[i] = 1;
+ pl->dist = bounds[j][i];
+ }
+ p->plane = *pl;
+ p->winding = BaseWindingForPlane (pl->normal, pl->dist);
+ AddPortalToNodes (p, node, &tree->outside_node);
+ }
+
+// clip the basewindings by all the other planes
+ for (i=0 ; i<6 ; i++)
+ {
+ for (j=0 ; j<6 ; j++)
+ {
+ if (j == i)
+ continue;
+ ChopWindingInPlace (&portals[i]->winding, bplanes[j].normal, bplanes[j].dist, ON_EPSILON);
+ }
+ }
+}
+
+//===================================================
+
+
+/*
+================
+BaseWindingForNode
+================
+*/
+#define BASE_WINDING_EPSILON 0.001
+#define SPLIT_WINDING_EPSILON 0.001
+
+winding_t *BaseWindingForNode (node_t *node)
+{
+ winding_t *w;
+ node_t *n;
+ plane_t *plane;
+ vec3_t normal;
+ vec_t dist;
+
+ w = BaseWindingForPlane (mapplanes[node->planenum].normal
+ , mapplanes[node->planenum].dist);
+
+ // clip by all the parents
+ for (n=node->parent ; n && w ; )
+ {
+ plane = &mapplanes[n->planenum];
+
+ if (n->children[0] == node)
+ { // take front
+ ChopWindingInPlace (&w, plane->normal, plane->dist, BASE_WINDING_EPSILON);
+ }
+ else
+ { // take back
+ VectorSubtract (vec3_origin, plane->normal, normal);
+ dist = -plane->dist;
+ ChopWindingInPlace (&w, normal, dist, BASE_WINDING_EPSILON);
+ }
+ node = n;
+ n = n->parent;
+ }
+
+ return w;
+}
+
+//============================================================
+
+qboolean WindingIsTiny (winding_t *w);
+
+/*
+==================
+MakeNodePortal
+
+create the new portal by taking the full plane winding for the cutting plane
+and clipping it by all of parents of this node
+==================
+*/
+void MakeNodePortal (node_t *node)
+{
+ portal_t *new_portal, *p;
+ winding_t *w;
+ vec3_t normal;
+ float dist;
+ int side;
+
+ w = BaseWindingForNode (node);
+
+ // clip the portal by all the other portals in the node
+ for (p = node->portals ; p && w; p = p->next[side])
+ {
+ if (p->nodes[0] == node)
+ {
+ side = 0;
+ VectorCopy (p->plane.normal, normal);
+ dist = p->plane.dist;
+ }
+ else if (p->nodes[1] == node)
+ {
+ side = 1;
+ VectorSubtract (vec3_origin, p->plane.normal, normal);
+ dist = -p->plane.dist;
+ }
+ else
+ Error ("CutNodePortals_r: mislinked portal");
+
+ ChopWindingInPlace (&w, normal, dist, 0.1);
+ }
+
+ if (!w)
+ {
+ return;
+ }
+
+ if (WindingIsTiny (w))
+ {
+ c_tinyportals++;
+ FreeWinding (w);
+ return;
+ }
+
+
+ new_portal = AllocPortal ();
+ new_portal->plane = mapplanes[node->planenum];
+ new_portal->onnode = node;
+ new_portal->winding = w;
+ AddPortalToNodes (new_portal, node->children[0], node->children[1]);
+}
+
+
+/*
+==============
+SplitNodePortals
+
+Move or split the portals that bound node so that the node's
+children have portals instead of node.
+==============
+*/
+void SplitNodePortals (node_t *node)
+{
+ portal_t *p, *next_portal, *new_portal;
+ node_t *f, *b, *other_node;
+ int side;
+ plane_t *plane;
+ winding_t *frontwinding, *backwinding;
+
+ plane = &mapplanes[node->planenum];
+ f = node->children[0];
+ b = node->children[1];
+
+ for (p = node->portals ; p ; p = next_portal)
+ {
+ if (p->nodes[0] == node)
+ side = 0;
+ else if (p->nodes[1] == node)
+ side = 1;
+ else
+ Error ("CutNodePortals_r: mislinked portal");
+ next_portal = p->next[side];
+
+ other_node = p->nodes[!side];
+ RemovePortalFromNode (p, p->nodes[0]);
+ RemovePortalFromNode (p, p->nodes[1]);
+
+//
+// cut the portal into two portals, one on each side of the cut plane
+//
+ ClipWindingEpsilon (p->winding, plane->normal, plane->dist,
+ SPLIT_WINDING_EPSILON, &frontwinding, &backwinding);
+
+ if (frontwinding && WindingIsTiny(frontwinding))
+ {
+ FreeWinding (frontwinding);
+ frontwinding = NULL;
+ c_tinyportals++;
+ }
+
+ if (backwinding && WindingIsTiny(backwinding))
+ {
+ FreeWinding (backwinding);
+ backwinding = NULL;
+ c_tinyportals++;
+ }
+
+ if (!frontwinding && !backwinding)
+ { // tiny windings on both sides
+ continue;
+ }
+
+ if (!frontwinding)
+ {
+ FreeWinding (backwinding);
+ if (side == 0)
+ AddPortalToNodes (p, b, other_node);
+ else
+ AddPortalToNodes (p, other_node, b);
+ continue;
+ }
+ if (!backwinding)
+ {
+ FreeWinding (frontwinding);
+ if (side == 0)
+ AddPortalToNodes (p, f, other_node);
+ else
+ AddPortalToNodes (p, other_node, f);
+ continue;
+ }
+
+ // the winding is split
+ new_portal = AllocPortal ();
+ *new_portal = *p;
+ new_portal->winding = backwinding;
+ FreeWinding (p->winding);
+ p->winding = frontwinding;
+
+ if (side == 0)
+ {
+ AddPortalToNodes (p, f, other_node);
+ AddPortalToNodes (new_portal, b, other_node);
+ }
+ else
+ {
+ AddPortalToNodes (p, other_node, f);
+ AddPortalToNodes (new_portal, other_node, b);
+ }
+ }
+
+ node->portals = NULL;
+}
+
+
+/*
+================
+CalcNodeBounds
+================
+*/
+void CalcNodeBounds (node_t *node)
+{
+ portal_t *p;
+ int s;
+ int i;
+
+ // calc mins/maxs for both leafs and nodes
+ ClearBounds (node->mins, node->maxs);
+ for (p = node->portals ; p ; p = p->next[s])
+ {
+ s = (p->nodes[1] == node);
+ for (i=0 ; i<p->winding->numpoints ; i++)
+ AddPointToBounds (p->winding->p[i], node->mins, node->maxs);
+ }
+}
+
+
+/*
+==================
+MakeTreePortals_r
+==================
+*/
+void MakeTreePortals_r (node_t *node)
+{
+ int i;
+
+ CalcNodeBounds (node);
+ if (node->mins[0] >= node->maxs[0])
+ {
+ printf ("WARNING: node without a volume\n");
+ }
+
+ for (i=0 ; i<3 ; i++)
+ {
+ if (node->mins[i] < -8000 || node->maxs[i] > 8000)
+ {
+ printf ("WARNING: node with unbounded volume\n");
+ break;
+ }
+ }
+ if (node->planenum == PLANENUM_LEAF)
+ return;
+
+ MakeNodePortal (node);
+ SplitNodePortals (node);
+
+ MakeTreePortals_r (node->children[0]);
+ MakeTreePortals_r (node->children[1]);
+}
+
+/*
+==================
+MakeTreePortals
+==================
+*/
+void MakeTreePortals (tree_t *tree)
+{
+ MakeHeadnodePortals (tree);
+ MakeTreePortals_r (tree->headnode);
+}
+
+/*
+=========================================================
+
+FLOOD ENTITIES
+
+=========================================================
+*/
+
+/*
+=============
+FloodPortals_r
+=============
+*/
+void FloodPortals_r (node_t *node, int dist)
+{
+ portal_t *p;
+ int s;
+
+ node->occupied = dist;
+
+ for (p=node->portals ; p ; p = p->next[s])
+ {
+ s = (p->nodes[1] == node);
+
+ if (p->nodes[!s]->occupied)
+ continue;
+
+ if (!Portal_EntityFlood (p, s))
+ continue;
+
+ FloodPortals_r (p->nodes[!s], dist+1);
+ }
+}
+
+/*
+=============
+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
+ node = node->children[1];
+ }
+
+ if (node->contents == CONTENTS_SOLID)
+ return false;
+ node->occupant = occupant;
+
+ FloodPortals_r (node, 1);
+
+ return true;
+}
+
+/*
+=============
+FloodEntities
+
+Marks all nodes that can be reached by entites
+=============
+*/
+qboolean FloodEntities (tree_t *tree)
+{
+ int i;
+ vec3_t origin;
+ char *cl;
+ qboolean inside;
+ node_t *headnode;
+
+ headnode = tree->headnode;
+ qprintf ("--- FloodEntities ---\n");
+ inside = false;
+ tree->outside_node.occupied = 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
+
+ // nudge playerstart around if needed so clipping hulls allways
+ // have a vlaid point
+ if (!strcmp (cl, "info_player_start"))
+ {
+ int x, y;
+
+ for (x=-16 ; x<=16 ; x += 16)
+ {
+ for (y=-16 ; y<=16 ; y += 16)
+ {
+ origin[0] += x;
+ origin[1] += y;
+ if (PlaceOccupant (headnode, origin, &entities[i]))
+ {
+ inside = true;
+ goto gotit;
+ }
+ origin[0] -= x;
+ origin[1] -= y;
+ }
+ }
+gotit: ;
+ }
+ else
+ {
+ if (PlaceOccupant (headnode, origin, &entities[i]))
+ inside = true;
+ }
+ }
+
+ 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;
+ entity_t *e;
+
+ if (node->contents == CONTENTS_AREAPORTAL)
+ {
+ // this node is part of an area portal
+ b = node->brushlist;
+ e = &entities[b->original->entitynum];
+
+ // if the current area has allready touched this
+ // portal, we are done
+ if (e->portalareas[0] == c_areas || e->portalareas[1] == c_areas)
+ return;
+
+ // note the current area as bounding the portal
+ if (e->portalareas[1])
+ {
+ printf ("WARNING: areaportal entity %i touches > 2 areas\n", b->original->entitynum);
+ return;
+ }
+ if (e->portalareas[0])
+ e->portalareas[1] = c_areas;
+ else
+ e->portalareas[0] = c_areas;
+
+ return;
+ }
+
+ if (node->area)
+ return; // allready got it
+ node->area = c_areas;
+
+ for (p=node->portals ; p ; p = p->next[s])
+ {
+ s = (p->nodes[1] == node);
+#if 0
+ if (p->nodes[!s]->occupied)
+ continue;
+#endif
+ if (!Portal_EntityFlood (p, s))
+ 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->area)
+ return; // allready got it
+
+ if (node->contents & CONTENTS_SOLID)
+ return;
+
+ if (!node->occupied)
+ return; // not reachable by entities
+
+ // area portals are allways only flooded into, never
+ // out of
+ if (node->contents == CONTENTS_AREAPORTAL)
+ return;
+
+ c_areas++;
+ FloodAreas_r (node);
+}
+
+/*
+=============
+SetAreaPortalAreas_r
+
+Just decend the tree, and for each node that hasn't had an
+area set, flood fill out from there
+=============
+*/
+void SetAreaPortalAreas_r (node_t *node)
+{
+ bspbrush_t *b;
+ entity_t *e;
+
+ if (node->planenum != PLANENUM_LEAF)
+ {
+ SetAreaPortalAreas_r (node->children[0]);
+ SetAreaPortalAreas_r (node->children[1]);
+ return;
+ }
+
+ if (node->contents == CONTENTS_AREAPORTAL)
+ {
+ if (node->area)
+ return; // allready set
+
+ b = node->brushlist;
+ e = &entities[b->original->entitynum];
+ node->area = e->portalareas[0];
+ if (!e->portalareas[1])
+ {
+ printf ("WARNING: areaportal entity %i doesn't touch two areas\n", b->original->entitynum);
+ return;
+ }
+ }
+}
+
+/*
+=============
+EmitAreaPortals
+
+=============
+*/
+void EmitAreaPortals (node_t *headnode)
+{
+ int i, j;
+ entity_t *e;
+ dareaportal_t *dp;
+
+ if (c_areas > MAX_MAP_AREAS)
+ Error ("MAX_MAP_AREAS");
+ numareas = c_areas+1;
+ numareaportals = 1; // leave 0 as an error
+
+ for (i=1 ; i<=c_areas ; i++)
+ {
+ dareas[i].firstareaportal = numareaportals;
+ for (j=0 ; j<num_entities ; j++)
+ {
+ e = &entities[j];
+ if (!e->areaportalnum)
+ continue;
+ dp = &dareaportals[numareaportals];
+ if (e->portalareas[0] == i)
+ {
+ dp->portalnum = e->areaportalnum;
+ dp->otherarea = e->portalareas[1];
+ numareaportals++;
+ }
+ else if (e->portalareas[1] == i)
+ {
+ dp->portalnum = e->areaportalnum;
+ dp->otherarea = e->portalareas[0];
+ numareaportals++;
+ }
+ }
+ dareas[i].numareaportals = numareaportals - dareas[i].firstareaportal;
+ }
+
+ qprintf ("%5i numareas\n", numareas);
+ qprintf ("%5i numareaportals\n", numareaportals);
+}
+
+/*
+=============
+FloodAreas
+
+Mark each leaf with an area, bounded by CONTENTS_AREAPORTAL
+=============
+*/
+void FloodAreas (tree_t *tree)
+{
+ qprintf ("--- FloodAreas ---\n");
+ FindAreas_r (tree->headnode);
+ SetAreaPortalAreas_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->contents != CONTENTS_SOLID)
+ {
+ c_outside++;
+ node->contents = CONTENTS_SOLID;
+ }
+ 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);
+}
+
+
+//==============================================================
+
+/*
+============
+FindPortalSide
+
+Finds a brush side to use for texturing the given portal
+============
+*/
+void FindPortalSide (portal_t *p)
+{
+ int viscontents;
+ bspbrush_t *bb;
+ mapbrush_t *brush;
+ node_t *n;
+ int i,j;
+ int planenum;
+ side_t *side, *bestside;
+ float dot, bestdot;
+ plane_t *p1, *p2;
+
+ // decide which content change is strongest
+ // solid > lava > water, etc
+ viscontents = VisibleContents (p->nodes[0]->contents ^ p->nodes[1]->contents);
+ if (!viscontents)
+ return;
+
+ planenum = p->onnode->planenum;
+ bestside = NULL;
+ bestdot = 0;
+
+ for (j=0 ; j<2 ; j++)
+ {
+ n = p->nodes[j];
+ p1 = &mapplanes[p->onnode->planenum];
+ for (bb=n->brushlist ; bb ; bb=bb->next)
+ {
+ brush = bb->original;
+ if ( !(brush->contents & viscontents) )
+ continue;
+ for (i=0 ; i<brush->numsides ; i++)
+ {
+ side = &brush->original_sides[i];
+ if (side->bevel)
+ continue;
+ if (side->texinfo == TEXINFO_NODE)
+ continue; // non-visible
+ if ((side->planenum&~1) == planenum)
+ { // exact match
+ bestside = &brush->original_sides[i];
+ goto gotit;
+ }
+ // see how close the match is
+ p2 = &mapplanes[side->planenum&~1];
+ dot = DotProduct (p1->normal, p2->normal);
+ if (dot > bestdot)
+ {
+ bestdot = dot;
+ bestside = side;
+ }
+ }
+ }
+ }
+
+gotit:
+ if (!bestside)
+ qprintf ("WARNING: side not found for portal\n");
+
+ p->sidefound = true;
+ p->side = bestside;
+}
+
+
+/*
+===============
+MarkVisibleSides_r
+
+===============
+*/
+void MarkVisibleSides_r (node_t *node)
+{
+ portal_t *p;
+ int s;
+
+ if (node->planenum != PLANENUM_LEAF)
+ {
+ MarkVisibleSides_r (node->children[0]);
+ MarkVisibleSides_r (node->children[1]);
+ return;
+ }
+
+ // empty leafs are never boundary leafs
+ if (!node->contents)
+ return;
+
+ // see if there is a visible face
+ for (p=node->portals ; p ; p = p->next[!s])
+ {
+ s = (p->nodes[0] == node);
+ if (!p->onnode)
+ continue; // edge of world
+ if (!p->sidefound)
+ FindPortalSide (p);
+ if (p->side)
+ p->side->visible = true;
+ }
+
+}
+
+/*
+=============
+MarkVisibleSides
+
+=============
+*/
+void MarkVisibleSides (tree_t *tree, int startbrush, int endbrush)
+{
+ int i, j;
+ mapbrush_t *mb;
+ int numsides;
+
+ qprintf ("--- MarkVisibleSides ---\n");
+
+ // clear all the visible flags
+ for (i=startbrush ; i<endbrush ; i++)
+ {
+ mb = &mapbrushes[i];
+
+ numsides = mb->numsides;
+ for (j=0 ; j<numsides ; j++)
+ mb->original_sides[j].visible = false;
+ }
+
+ // set visible flags on the sides that are used by portals
+ MarkVisibleSides_r (tree->headnode);
+}
+
projects / xonotic / netradiant.git / blobdiff