+++ /dev/null
-// tilecache.cxx -- routines to handle scenery tile caching
-//
-// Written by Curtis Olson, started January 1998.
-//
-// Copyright (C) 1998 - 2000 Curtis L. Olson - curt@flightgear.org
-//
-// This program 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.
-//
-// This program 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 this program; if not, write to the Free Software
-// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-//
-// $Id$
-
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#ifdef HAVE_WINDOWS_H
-# include <windows.h>
-#endif
-
-#include <GL/glut.h>
-#include <simgear/xgl/xgl.h>
-
-#include <plib/ssg.h> // plib include
-
-#include <simgear/bucket/newbucket.hxx>
-#include <simgear/debug/logstream.hxx>
-#include <simgear/misc/fgstream.hxx>
-#include <simgear/misc/fgpath.hxx>
-
-#include <Main/globals.hxx>
-#include <Objects/obj.hxx>
-#include <Scenery/scenery.hxx> // for scenery.center
-
-#include "tilecache.hxx"
-#include "tileentry.hxx"
-
-FG_USING_NAMESPACE(std);
-
-// a cheesy hack (to be fixed later)
-extern ssgBranch *terrain;
-extern ssgEntity *penguin;
-
-
-// the tile cache
-FGTileCache global_tile_cache;
-
-
-// Constructor
-FGTileCache::FGTileCache( void ) {
- tile_cache.clear();
-}
-
-
-// Initialize the tile cache subsystem
-void
-FGTileCache::init( void )
-{
- int i;
-
- FG_LOG( FG_TERRAIN, FG_INFO, "Initializing the tile cache." );
-
- // expand cache if needed. For best results ... i.e. to avoid
- // tile load problems and blank areas:
- //
- // target_cache_size >= (current.options.tile_diameter + 1) ** 2
- //
- int side = globals->get_options()->get_tile_diameter() + 2;
- int target_cache_size = (side*side);
- FG_LOG( FG_TERRAIN, FG_DEBUG, " target cache size = "
- << target_cache_size );
- FG_LOG( FG_TERRAIN, FG_DEBUG, " current cache size = "
- << tile_cache.size() );
- FGTileEntry e;
- e.mark_unused();
- e.vec3_ptrs.clear();
- e.vec2_ptrs.clear();
- e.index_ptrs.clear();
-
- FG_LOG( FG_TERRAIN, FG_DEBUG, " size of tile = "
- << sizeof( e ) );
- if ( target_cache_size > (int)tile_cache.size() ) {
- // FGTileEntry e;
- int expansion_amt = target_cache_size - (int)tile_cache.size();
- for ( i = 0; i < expansion_amt; ++i ) {
- tile_cache.push_back( e );
- FG_LOG( FG_TERRAIN, FG_DEBUG, " expanding cache size = "
- << tile_cache.size() );
- }
- }
- FG_LOG( FG_TERRAIN, FG_DEBUG, " done expanding cache, size = "
- << tile_cache.size() );
-
- for ( i = 0; i < (int)tile_cache.size(); i++ ) {
- if ( !tile_cache[i].is_unused() ) {
- entry_free(i);
- }
- tile_cache[i].mark_unused();
- tile_cache[i].tile_bucket.make_bad();
- }
-
- // and ... just in case we missed something ...
- terrain->removeAllKids();
-
- FG_LOG( FG_TERRAIN, FG_INFO, " done with init()" );
-}
-
-
-// Search for the specified "bucket" in the cache
-int
-FGTileCache::exists( const FGBucket& p )
-{
- int i;
-
- for ( i = 0; i < (int)tile_cache.size(); i++ ) {
- if ( tile_cache[i].tile_bucket == p ) {
- FG_LOG( FG_TERRAIN, FG_DEBUG,
- "TILE EXISTS in cache ... index = " << i );
- return( i );
- }
- }
-
- return( -1 );
-}
-
-
-#if 0
-static void print_refs( ssgSelector *sel, ssgTransform *trans,
- ssgRangeSelector *range)
-{
- cout << "selector -> " << sel->getRef()
- << " transform -> " << trans->getRef()
- << " range -> " << range->getRef() << endl;
-}
-#endif
-
-
-// Fill in a tile cache entry with real data for the specified bucket
-void
-FGTileCache::fill_in( int index, const FGBucket& p )
-{
- // cout << "FILL IN CACHE ENTRY = " << index << endl;
-
- tile_cache[index].center = Point3D( 0.0 );
- if ( tile_cache[index].vec3_ptrs.size() ||
- tile_cache[index].vec2_ptrs.size() ||
- tile_cache[index].index_ptrs.size() )
- {
- FG_LOG( FG_TERRAIN, FG_ALERT,
- "Attempting to overwrite existing or"
- << " not properly freed leaf data." );
- exit(-1);
- }
-
- tile_cache[index].select_ptr = new ssgSelector;
- tile_cache[index].transform_ptr = new ssgTransform;
- tile_cache[index].range_ptr = new ssgRangeSelector;
- tile_cache[index].tile_bucket = p;
-
- FGPath tile_path;
- if ( globals->get_options()->get_fg_scenery() != "" ) {
- tile_path.set( globals->get_options()->get_fg_scenery() );
- } else {
- tile_path.set( globals->get_options()->get_fg_root() );
- tile_path.append( "Scenery" );
- }
- tile_path.append( p.gen_base_path() );
-
- // Load the appropriate data file
- FGPath tile_base = tile_path;
- tile_base.append( p.gen_index_str() );
- ssgBranch *new_tile = fgObjLoad( tile_base.str(), &tile_cache[index],
- true );
-
- if ( new_tile != NULL ) {
- tile_cache[index].range_ptr->addKid( new_tile );
- }
-
- // load custom objects
- cout << "CUSTOM OBJECTS" << endl;
-
- FGPath index_path = tile_path;
- index_path.append( p.gen_index_str() );
- index_path.concat( ".ind" );
-
- cout << "Looking in " << index_path.str() << endl;
-
- fg_gzifstream in( index_path.str() );
-
- if ( in.is_open() ) {
- string token, name;
-
- while ( ! in.eof() ) {
- in >> token;
- in >> name;
-#if defined ( macintosh ) || defined ( _MSC_VER )
- in >> ::skipws;
-#else
- in >> skipws;
-#endif
- cout << "token = " << token << " name = " << name << endl;
-
- FGPath custom_path = tile_path;
- custom_path.append( name );
- ssgBranch *custom_obj = fgObjLoad( custom_path.str(),
- &tile_cache[index], false );
- if ( (new_tile != NULL) && (custom_obj != NULL) ) {
- new_tile -> addKid( custom_obj );
- }
- }
- }
-
- tile_cache[index].transform_ptr->addKid( tile_cache[index].range_ptr );
-
- // calculate initial tile offset
- tile_cache[index].SetOffset( scenery.center );
- sgCoord sgcoord;
- sgSetCoord( &sgcoord,
- tile_cache[index].offset.x(),
- tile_cache[index].offset.y(), tile_cache[index].offset.z(),
- 0.0, 0.0, 0.0 );
- tile_cache[index].transform_ptr->setTransform( &sgcoord );
-
- tile_cache[index].select_ptr->addKid( tile_cache[index].transform_ptr );
- terrain->addKid( tile_cache[index].select_ptr );
-
- if ( tile_cache[index].is_scheduled_for_cache() ) {
- // cout << "FOUND ONE SCHEDULED FOR CACHE" << endl;
- // load, but not needed now so disable
- tile_cache[index].mark_loaded();
- tile_cache[index].ssg_disable();
- tile_cache[index].select_ptr->select(0);
- } else {
- // cout << "FOUND ONE READY TO LOAD" << endl;
- tile_cache[index].mark_loaded();
- tile_cache[index].select_ptr->select(1);
- }
-}
-
-
-// Free a tile cache entry
-void
-FGTileCache::entry_free( int cache_index )
-{
- // cout << "FREEING CACHE ENTRY = " << cache_index << endl;
- tile_cache[cache_index].free_tile();
-}
-
-
-// Return index of next available slot in tile cache
-int
-FGTileCache::next_avail( void )
-{
- // Point3D delta;
- sgdVec3 abs_view_pos;
- int i;
- // float max, med, min, tmp;
- float dist, max_dist;
- int max_index;
-
- max_dist = 0.0;
- max_index = -1;
-
- for ( i = 0; i < (int)tile_cache.size(); i++ ) {
- // only look at freeing NON-scheduled (i.e. ready to load
- // cache entries. This assumes that the cache is always big
- // enough for our tile radius!
-
- if ( tile_cache[i].is_unused() ) {
- // favor unused cache slots
- return(i);
- } else if ( tile_cache[i].is_loaded() || tile_cache[i].is_cached() ) {
- // calculate approximate distance from view point
- sgdCopyVec3( abs_view_pos,
- globals->get_current_view()->get_abs_view_pos() );
-
- FG_LOG( FG_TERRAIN, FG_DEBUG, "DIST Abs view pos = "
- << abs_view_pos[0] << ","
- << abs_view_pos[1] << ","
- << abs_view_pos[2] );
- FG_LOG( FG_TERRAIN, FG_DEBUG,
- " ref point = " << tile_cache[i].center );
-
- /*
- delta.setx( fabs(tile_cache[i].center.x() - abs_view_pos.x() ) );
- delta.sety( fabs(tile_cache[i].center.y() - abs_view_pos.y() ) );
- delta.setz( fabs(tile_cache[i].center.z() - abs_view_pos.z() ) );
-
- max = delta.x(); med = delta.y(); min = delta.z();
- if ( max < med ) {
- tmp = max; max = med; med = tmp;
- }
- if ( max < min ) {
- tmp = max; max = min; min = tmp;
- }
- dist = max + (med + min) / 4;
- */
-
- sgdVec3 center;
- sgdSetVec3( center,
- tile_cache[i].center[0],
- tile_cache[i].center[1],
- tile_cache[i].center[2] );
- dist = sgdDistanceVec3( center, abs_view_pos );
-
- FG_LOG( FG_TERRAIN, FG_DEBUG, " distance = " << dist );
-
- if ( dist > max_dist ) {
- max_dist = dist;
- max_index = i;
- }
- }
- }
-
- // If we made it this far, then there were no open cache entries.
- // We will instead free the furthest cache entry and return it's
- // index.
-
- if ( max_index >=0 ) {
- FG_LOG( FG_TERRAIN, FG_DEBUG, " max_dist = " << max_dist );
- FG_LOG( FG_TERRAIN, FG_DEBUG, " index = " << max_index );
- entry_free( max_index );
- return( max_index );
- } else {
- FG_LOG( FG_TERRAIN, FG_ALERT, "WHOOPS!!! Dying in next_avail()" );
- exit( -1 );
- }
-
- // avoid a potential compiler warning
- return -1;
-}
-
-
-// Destructor
-FGTileCache::~FGTileCache( void ) {
-}
-
-
+++ /dev/null
-// tilecache.hxx -- routines to handle scenery tile caching
-//
-// Written by Curtis Olson, started January 1998.
-//
-// Copyright (C) 1998 - 2000 Curtis L. Olson - curt@flightgear.org
-//
-// This program 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.
-//
-// This program 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 this program; if not, write to the Free Software
-// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-//
-// $Id$
-
-
-#ifndef _TILECACHE_HXX
-#define _TILECACHE_HXX
-
-
-#ifndef __cplusplus
-# error This library requires C++
-#endif
-
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#ifdef HAVE_WINDOWS_H
-# include <windows.h>
-#endif
-
-#include <GL/glut.h>
-#include <simgear/xgl/xgl.h>
-
-#include <vector>
-
-#include <simgear/bucket/newbucket.hxx>
-#include <simgear/math/point3d.hxx>
-
-#include "tileentry.hxx"
-
-FG_USING_STD(vector);
-
-
-// A class to store and manage a pile of tiles
-class FGTileCache {
-
- // cache storage space
- tile_list tile_cache;
-
-public:
-
- // Constructor
- FGTileCache( void );
-
- // Destructor
- ~FGTileCache( void );
-
- // Initialize the tile cache subsystem
- void init( void );
-
- // Search for the specified "bucket" in the cache
- int exists( const FGBucket& p );
-
- // Return index of next available slot in tile cache
- int next_avail( void );
-
- // Free a tile cache entry
- void entry_free( int index );
-
- // Fill in a tile cache entry with real data for the specified bucket
- void fill_in( int index, const FGBucket& p );
-
- // Return a pointer to the specified tile cache entry
- FGTileEntry *get_tile( int index ) {
- return &tile_cache[index];
- }
-
- // Return the cache size
- inline size_t get_size() const { return tile_cache.size(); }
-};
-
-
-// the tile cache
-extern FGTileCache global_tile_cache;
-
-
-#endif // _TILECACHE_HXX
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