1 // tile.cxx -- routines to handle a scenery tile
3 // Written by Curtis Olson, started May 1998.
5 // Copyright (C) 1998, 1999 Curtis L. Olson - curt@flightgear.org
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <Include/compiler.h>
26 #ifdef FG_MATH_EXCEPTION_CLASH
30 #include STL_FUNCTIONAL
31 #include STL_ALGORITHM
33 #include <Debug/logstream.hxx>
34 #include <Bucket/newbucket.hxx>
36 #include "tileentry.hxx"
38 FG_USING_STD(for_each);
39 FG_USING_STD(mem_fun_ref);
43 FGTileEntry::FGTileEntry ( void )
55 FGTileEntry::~FGTileEntry ( void ) {
56 // cout << "nodes = " << nodes.size() << endl;;
61 // recurse an ssg tree and call removeKid() on every node from the
62 // bottom up. Leaves the original branch in existance, but empty so
63 // it can be removed by the calling routine.
64 static void my_remove_branch( ssgBranch * branch ) {
65 for ( ssgEntity *k = branch->getKid( 0 );
67 k = branch->getNextKid() )
69 if ( k -> isAKindOf ( ssgTypeBranch() ) ) {
70 my_remove_branch( (ssgBranch *)k );
71 branch -> removeKid ( k );
72 } else if ( k -> isAKindOf ( ssgTypeLeaf() ) ) {
73 branch -> removeKid ( k ) ;
79 // Step through the fragment list, deleting the display list, then the
80 // fragment, until the list is empty. Also delete the arrays used by
81 // ssg as well as the whole ssg branch
83 FGTileEntry::free_tile()
85 FG_LOG( FG_TERRAIN, FG_DEBUG,
86 "FREEING TILE = (" << tile_bucket << ")" );
91 // delete fragment list and node list
92 FG_LOG( FG_TERRAIN, FG_DEBUG,
93 " deleting " << fragment_list.size() << " fragments" );
94 fragment_list.clear();
95 FG_LOG( FG_TERRAIN, FG_DEBUG,
96 " deleting " << nodes.size() << " nodes" );
99 // delete the ssg structures
100 FG_LOG( FG_TERRAIN, FG_DEBUG,
101 " deleting vertex, normal, and texture coordinate arrays" );
102 FG_LOG( FG_TERRAIN, FG_DEBUG,
103 " deleting vertex array" );
104 if ( vtlist != NULL ) {
108 FG_LOG( FG_TERRAIN, FG_DEBUG,
109 " deleting normal array" );
110 if ( vnlist != NULL ) {
114 FG_LOG( FG_TERRAIN, FG_DEBUG,
115 " deleting texture coordinate array" );
116 if ( tclist != NULL ) {
120 for ( int i = 0; i < (int)free_ptrs.size(); ++i ) {
125 // delete the ssg branch
127 int pcount = select_ptr->getNumParents();
129 // find the first parent (should only be one)
130 ssgBranch *parent = select_ptr->getParent( 0 ) ;
132 my_remove_branch( select_ptr );
133 parent->removeKid( select_ptr );
135 FG_LOG( FG_TERRAIN, FG_ALERT,
136 "parent pointer is NULL! Dying" );
140 FG_LOG( FG_TERRAIN, FG_ALERT,
141 "Parent count is zero for an ssg tile! Dying" );
147 // when a tile is still in the cache, but not in the immediate draw
148 // list, it can still remain in the scene graph, but we use a range
149 // selector to disable it from ever being drawn.
151 FGTileEntry::ssg_disable() {
152 // cout << "TILE STATE = " << state << endl;
153 if ( state == Scheduled_for_use ) {
154 state = Scheduled_for_cache;
155 } else if ( state == Scheduled_for_cache ) {
157 } else if ( (state == Loaded) || (state == Cached) ) {
159 // cout << "DISABLING SSG NODE" << endl;
160 select_ptr->select(0);
162 FG_LOG( FG_TERRAIN, FG_ALERT,
163 "Trying to disable an unused tile! Dying" );
166 // cout << "TILE STATE = " << state << endl;