857 lines
19 KiB
C++
857 lines
19 KiB
C++
/* -------------------------------------------------------------------------------
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Copyright (C) 1999-2007 id Software, Inc. and contributors.
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For a list of contributors, see the accompanying CONTRIBUTORS file.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GtkRadiant is distributed in the hope that it will be useful,
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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 GtkRadiant; 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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This code has been altered significantly from its original form, to support
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several games based on the Quake III Arena engine, in the form of "Q3Map2."
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------------------------------------------------------------------------------- */
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/* dependencies */
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#include "q3map2.h"
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/*
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PortalPassable
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returns true if the portal has non-opaque leafs on both sides
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*/
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bool PortalPassable( const portal_t *p ){
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/* is this to global outside leaf? */
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if ( !p->onnode ) {
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return false;
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}
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/* this should never happen */
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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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/* ydnar: added antiportal to suppress portal generation for visibility blocking */
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if ( p->compileFlags & C_ANTIPORTAL ) {
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return false;
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}
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/* both leaves on either side of the portal must be passable */
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if ( !p->nodes[ 0 ]->opaque && !p->nodes[ 1 ]->opaque ) {
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return true;
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}
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/* otherwise this isn't a passable portal */
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return false;
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}
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static int c_tinyportals;
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static int c_badportals; /* ydnar */
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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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static void AddPortalToNodes( portal_t *p, node_t *front, node_t *back ){
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if ( p->nodes[0] || p->nodes[1] ) {
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Error( "AddPortalToNode: already included" );
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}
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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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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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}
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if ( t == portal ) {
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break;
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}
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if ( t->nodes[0] == l ) {
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pp = &t->next[0];
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}
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else if ( t->nodes[1] == l ) {
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pp = &t->next[1];
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}
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else{
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Error( "RemovePortalFromNode: portal not bounding leaf" );
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}
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}
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if ( portal->nodes[0] == l ) {
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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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*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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static void PrintPortal( const portal_t *p ){
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for ( const Vector3& point : p->winding )
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Sys_Printf( "(%5.0f,%5.0f,%5.0f)\n", point[0], point[1], point[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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static void MakeHeadnodePortals( tree_t& tree ){
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portal_t *portals[6];
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// pad with some space so there will never be null volume leafs
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const MinMax bounds( tree.minmax.mins - Vector3( SIDESPACE ),
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tree.minmax.maxs + Vector3( SIDESPACE ) );
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if ( !bounds.valid() ) {
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Error( "Backwards tree volume" );
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}
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tree.outside_node.planenum = PLANENUM_LEAF;
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tree.outside_node.brushlist.clear();
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tree.outside_node.portals = NULL;
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tree.outside_node.opaque = false;
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for ( int i = 0; i < 3; ++i )
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for ( int j = 0; j < 2; ++j )
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{
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portal_t *p = portals[j * 3 + i] = AllocPortal();
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if ( j ) {
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p->plane.plane = Plane3f( -g_vector3_axes[i], -bounds.maxs[i] );
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}
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else
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{
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p->plane.plane = Plane3f( g_vector3_axes[i], bounds.mins[i] );
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}
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p->winding = BaseWindingForPlane( p->plane.plane );
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AddPortalToNodes( p, tree.headnode, &tree.outside_node );
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}
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// clip the basewindings by all the other planes
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for ( int i = 0; i < 6; ++i )
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{
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for ( int 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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}
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ChopWindingInPlace( portals[i]->winding, portals[j]->plane.plane, 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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static winding_t BaseWindingForNode( const node_t *node ){
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winding_t w = BaseWindingForPlane( mapplanes[node->planenum].plane );
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// clip by all the parents
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for ( const node_t *n = node->parent; n && !w.empty(); )
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{
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const plane_t& plane = mapplanes[n->planenum];
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if ( n->children[0] == node ) { // take front
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ChopWindingInPlace( w, plane.plane, BASE_WINDING_EPSILON );
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}
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else
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{ // take back
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ChopWindingInPlace( w, plane3_flipped( plane.plane ), 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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static void MakeNodePortal( node_t *node ){
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int side;
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winding_t w = BaseWindingForNode( node );
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// clip the portal by all the other portals in the node
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for ( const portal_t *p = node->portals; p && !w.empty(); p = p->next[side] )
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{
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if ( p->nodes[0] == node ) {
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side = 0;
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ChopWindingInPlace( w, p->plane.plane, CLIP_EPSILON );
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}
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else if ( p->nodes[1] == node ) {
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side = 1;
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ChopWindingInPlace( w, plane3_flipped( p->plane.plane ), CLIP_EPSILON );
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}
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else{
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Error( "CutNodePortals_r: mislinked portal" );
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}
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}
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if ( w.empty() ) {
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return;
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}
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/* ydnar: adding this here to fix degenerate windings */
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#if 0
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if ( !FixWinding( w ) ) {
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c_badportals++;
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return;
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}
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#endif
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if ( WindingIsTiny( w ) ) {
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c_tinyportals++;
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return;
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}
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portal_t *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.swap( w );
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new_portal->compileFlags = node->compileFlags;
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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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static void SplitNodePortals( node_t *node ){
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node_t *f, *b, *other_node;
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const plane_t& 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 ( portal_t *next_portal, *p = node->portals; p; p = next_portal )
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{
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int side;
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if ( p->nodes[0] == node ) {
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side = 0;
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}
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else if ( p->nodes[1] == node ) {
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side = 1;
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}
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else{
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Error( "SplitNodePortals: mislinked portal" );
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}
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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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auto [frontwinding, backwinding] = ClipWindingEpsilon( p->winding, plane.plane, SPLIT_WINDING_EPSILON ); /* not strict, we want to always keep one of them even if coplanar */
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if ( !frontwinding.empty() && WindingIsTiny( frontwinding ) ) {
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if ( !f->tinyportals ) {
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f->referencepoint = frontwinding[0];
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}
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f->tinyportals++;
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if ( !other_node->tinyportals ) {
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other_node->referencepoint = frontwinding[0];
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}
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other_node->tinyportals++;
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frontwinding.clear();
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c_tinyportals++;
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}
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if ( !backwinding.empty() && WindingIsTiny( backwinding ) ) {
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if ( !b->tinyportals ) {
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b->referencepoint = backwinding[0];
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}
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b->tinyportals++;
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if ( !other_node->tinyportals ) {
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other_node->referencepoint = backwinding[0];
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}
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other_node->tinyportals++;
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backwinding.clear();
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c_tinyportals++;
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}
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if ( frontwinding.empty() && backwinding.empty() ) { // tiny windings on both sides
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continue;
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}
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if ( frontwinding.empty() ) {
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if ( side == 0 ) {
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AddPortalToNodes( p, b, other_node );
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}
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else{
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AddPortalToNodes( p, other_node, b );
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}
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continue;
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}
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if ( backwinding.empty() ) {
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if ( side == 0 ) {
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AddPortalToNodes( p, f, other_node );
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}
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else{
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AddPortalToNodes( p, other_node, f );
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}
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continue;
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}
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// the winding is split
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p->winding.clear();
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portal_t *new_portal = new portal_t( *p ); // AllocPortal()
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new_portal->winding.swap( backwinding );
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p->winding.swap( frontwinding );
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if ( side == 0 ) {
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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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static void CalcNodeBounds( node_t *node ){
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portal_t *p;
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int s;
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// calc mins/maxs for both leafs and nodes
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node->minmax.clear();
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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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WindingExtendBounds( p->winding, node->minmax );
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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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static void MakeTreePortals_r( node_t *node ){
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CalcNodeBounds( node );
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if ( !node->minmax.valid() ) {
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Sys_Warning( "node without a volume\n"
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"node has %d tiny portals\n"
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"node reference point %1.2f %1.2f %1.2f\n",
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node->tinyportals,
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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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if ( !c_worldMinmax.surrounds( node->minmax ) ) {
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if ( node->portals && !node->portals->winding.empty() ) {
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xml_Winding( "WARNING: Node With Unbounded Volume", node->portals->winding.data(), node->portals->winding.size(), false );
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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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}
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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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MakeTreePortals
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==================
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*/
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void MakeTreePortals( tree_t& tree ){
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Sys_FPrintf( SYS_VRB, "--- MakeTreePortals ---\n" );
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MakeHeadnodePortals( tree );
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MakeTreePortals_r( tree.headnode );
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Sys_FPrintf( SYS_VRB, "%9d tiny portals\n", c_tinyportals );
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Sys_FPrintf( SYS_VRB, "%9d bad portals\n", c_badportals ); /* ydnar */
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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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static int c_floodedleafs;
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static void FloodPortals( node_t *node, bool skybox ){
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int dist = 1;
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std::vector<node_t*> nodes{ node };
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while( !nodes.empty() ){
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std::vector<node_t*> nodes2;
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for( node_t *n : nodes ){
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if ( skybox ) {
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n->skybox = skybox;
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}
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if ( n->opaque || ( n->occupied && n->occupied <= dist ) ) { // also reprocess occupied nodes for shorter leak line
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continue;
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}
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if( !n->occupied ){
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++c_floodedleafs;
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}
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n->occupied = dist;
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int s;
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for ( portal_t *p = n->portals; p; p = p->next[ s ] )
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{
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s = ( p->nodes[ 1 ] == n );
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nodes2.push_back( p->nodes[ !s ] );
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}
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}
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nodes.swap( nodes2 );
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++dist;
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}
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}
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/*
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=============
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PlaceOccupant
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=============
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*/
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static bool PlaceOccupant( node_t *headnode, const Vector3& origin, const entity_t *occupant, bool skybox ){
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node_t *node;
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// find the leaf to start in
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node = headnode;
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while ( node->planenum != PLANENUM_LEAF )
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{
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if ( plane3_distance_to_point( mapplanes[ node->planenum ].plane, origin ) >= 0 ) {
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node = node->children[ 0 ];
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}
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else{
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node = node->children[ 1 ];
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}
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}
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if ( node->opaque ) {
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return false;
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}
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node->occupant = occupant;
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node->skybox = skybox;
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FloodPortals( node, skybox );
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return true;
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}
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/*
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=============
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FloodEntities
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Marks all nodes that can be reached by entites
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=============
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*/
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EFloodEntities FloodEntities( tree_t& tree ){
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bool r, inside, skybox;
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Sys_FPrintf( SYS_VRB, "--- FloodEntities ---\n" );
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inside = false;
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tree.outside_node.occupied = 0;
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c_floodedleafs = 0;
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for ( std::size_t i = 1; i < entities.size(); ++i )
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{
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/* get entity */
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const entity_t& e = entities[ i ];
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/* get origin */
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Vector3 origin( e.vectorForKey( "origin" ) );
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#if 0 // 0 = allow maps with only point entity@( 0, 0, 0 ); assuming that entities, containing no primitives are point ones
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/* as a special case, allow origin-less entities */
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if ( VectorCompare( origin, g_vector3_identity ) ) {
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continue;
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}
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#endif
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/* also allow bmodel entities outside, as they could be on a moving path that will go into the map */
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if ( !e.brushes.empty() || e.patches != NULL || e.classname_is( "_decal" ) ) { //_decal primitive is freed at this point
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continue;
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}
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/* handle skybox entities */
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if ( e.classname_is( "_skybox" ) ) {
|
|
skybox = true;
|
|
|
|
/* get scale */
|
|
Vector3 scale( 64 );
|
|
if( !e.read_keyvalue( scale, "_scale" ) )
|
|
if( e.read_keyvalue( scale[0], "_scale" ) )
|
|
scale[1] = scale[2] = scale[0];
|
|
|
|
/* get "angle" (yaw) or "angles" (pitch yaw roll), store as (roll pitch yaw) */
|
|
Vector3 angles( 0 );
|
|
if ( e.read_keyvalue( angles, "angles" ) || e.read_keyvalue( angles.y(), "angle" ) )
|
|
angles = angles_pyr2rpy( angles );
|
|
|
|
/* set transform matrix (thanks spog) */
|
|
skyboxTransform = g_matrix4_identity;
|
|
matrix4_pivoted_transform_by_euler_xyz_degrees( skyboxTransform, -origin, angles, scale, origin );
|
|
}
|
|
else{
|
|
skybox = false;
|
|
}
|
|
|
|
/* nudge off floor */
|
|
origin[ 2 ] += 1;
|
|
|
|
/* debugging code */
|
|
//% if( i == 1 )
|
|
//% origin[ 2 ] += 4096;
|
|
|
|
/* find leaf */
|
|
r = PlaceOccupant( tree.headnode, origin, &e, skybox );
|
|
if ( r ) {
|
|
inside = true;
|
|
}
|
|
else {
|
|
Sys_FPrintf( SYS_WRN, "Entity %i (%s): Entity in solid\n", e.mapEntityNum, e.classname() );
|
|
}
|
|
}
|
|
|
|
Sys_FPrintf( SYS_VRB, "%9d flooded leafs\n", c_floodedleafs );
|
|
|
|
if ( !inside ) {
|
|
Sys_FPrintf( SYS_WRN | SYS_VRBflag, "no entities in open -- no filling\n" );
|
|
return EFloodEntities::Empty;
|
|
}
|
|
if ( tree.outside_node.occupied ) {
|
|
Sys_FPrintf( SYS_WRN | SYS_VRBflag, "entity reached from outside -- leak detected\n" );
|
|
return EFloodEntities::Leaked;
|
|
}
|
|
|
|
return EFloodEntities::Good;
|
|
}
|
|
|
|
/*
|
|
=========================================================
|
|
|
|
FLOOD AREAS
|
|
|
|
=========================================================
|
|
*/
|
|
|
|
static int c_areas;
|
|
|
|
|
|
|
|
/*
|
|
FloodAreas_r()
|
|
floods through leaf portals to tag leafs with an area
|
|
*/
|
|
|
|
static void FloodAreas_r( node_t *node ){
|
|
int s;
|
|
portal_t *p;
|
|
|
|
|
|
if ( node->areaportal ) {
|
|
if ( node->area == -1 ) {
|
|
node->area = c_areas;
|
|
}
|
|
|
|
/* this node is part of an area portal brush */
|
|
brush_t *b = node->brushlist.front().original;
|
|
|
|
/* if the current area has already 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 ) {
|
|
Sys_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;
|
|
}
|
|
if ( node->cluster == -1 ) {
|
|
return;
|
|
}
|
|
|
|
node->area = c_areas;
|
|
|
|
/* ydnar: skybox nodes set the skybox area */
|
|
if ( node->skybox ) {
|
|
skyboxArea = c_areas;
|
|
}
|
|
|
|
for ( p = node->portals; p; p = p->next[ s ] )
|
|
{
|
|
s = ( p->nodes[1] == node );
|
|
|
|
/* ydnar: allow areaportal portals to block area flow */
|
|
if ( p->compileFlags & C_AREAPORTAL ) {
|
|
continue;
|
|
}
|
|
|
|
if ( !PortalPassable( 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
|
|
=============
|
|
*/
|
|
static 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 || node->areaportal || node->area != -1 ) {
|
|
return;
|
|
}
|
|
|
|
FloodAreas_r( node );
|
|
c_areas++;
|
|
}
|
|
|
|
/*
|
|
=============
|
|
CheckAreas_r
|
|
=============
|
|
*/
|
|
static void CheckAreas_r( const node_t *node ){
|
|
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 ) {
|
|
Sys_Warning( "cluster %d has area set to -1\n", node->cluster );
|
|
}
|
|
}
|
|
if ( node->areaportal ) {
|
|
const brush_t *b = node->brushlist.front().original;
|
|
|
|
// check if the areaportal touches two areas
|
|
if ( b->portalareas[0] == -1 || b->portalareas[1] == -1 ) {
|
|
Sys_Warning( "areaportal brush %i doesn't touch two areas\n", b->brushNum );
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
FloodSkyboxArea_r() - ydnar
|
|
sets all nodes with the skybox area to skybox
|
|
*/
|
|
|
|
static void FloodSkyboxArea_r( node_t *node ){
|
|
if ( skyboxArea < 0 ) {
|
|
return;
|
|
}
|
|
|
|
if ( node->planenum != PLANENUM_LEAF ) {
|
|
FloodSkyboxArea_r( node->children[ 0 ] );
|
|
FloodSkyboxArea_r( node->children[ 1 ] );
|
|
return;
|
|
}
|
|
|
|
if ( node->opaque || node->area != skyboxArea ) {
|
|
return;
|
|
}
|
|
|
|
node->skybox = true;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
FloodAreas()
|
|
mark each leaf with an area, bounded by C_AREAPORTAL
|
|
*/
|
|
|
|
void FloodAreas( tree_t& tree ){
|
|
Sys_FPrintf( SYS_VRB, "--- FloodAreas ---\n" );
|
|
FindAreas_r( tree.headnode );
|
|
|
|
/* ydnar: flood all skybox nodes */
|
|
FloodSkyboxArea_r( tree.headnode );
|
|
|
|
/* check for areaportal brushes that don't touch two areas */
|
|
/* ydnar: fix this rather than just silence the warnings */
|
|
//% CheckAreas_r( tree.headnode );
|
|
|
|
Sys_FPrintf( SYS_VRB, "%9d areas\n", c_areas );
|
|
}
|
|
|
|
|
|
|
|
//======================================================
|
|
|
|
static int c_outside;
|
|
static int c_inside;
|
|
static int c_solid;
|
|
|
|
static 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 = true;
|
|
}
|
|
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;
|
|
Sys_FPrintf( SYS_VRB, "--- FillOutside ---\n" );
|
|
FillOutside_r( headnode );
|
|
Sys_FPrintf( SYS_VRB, "%9d solid leafs\n", c_solid );
|
|
Sys_Printf( "%9d leafs filled\n", c_outside );
|
|
Sys_FPrintf( SYS_VRB, "%9d inside leafs\n", c_inside );
|
|
}
|
|
|
|
|
|
//==============================================================
|