src/staticobject.h

   1 /*
   2 Minetest-m13
   3 Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #ifndef STATICOBJECT_HEADER
  21 #define STATICOBJECT_HEADER
  22
  23 #include "common_irrlicht.h"
  24 #include <string>
  25 #include <sstream>
  26 #include "utility.h"
  27
  28 struct StaticObject
  29 {
  30         u8 type;
  31         v3f pos;
  32         std::string data;
  33
  34         StaticObject():
  35                 type(0),
  36                 pos(0,0,0)
  37         {
  38         }
  39         StaticObject(u8 type_, v3f pos_, const std::string &data_):
  40                 type(type_),
  41                 pos(pos_),
  42                 data(data_)
  43         {
  44         }
  45
  46         void serialize(std::ostream &os)
  47         {
  48                 char buf[12];
  49                 // type
  50                 buf[0] = type;
  51                 os.write(buf, 1);
  52                 // pos
  53                 writeV3S32((u8*)buf, v3s32(pos.X*1000,pos.Y*1000,pos.Z*1000));
  54                 os.write(buf, 12);
  55                 // data
  56                 os<<serializeString(data);
  57         }
  58         void deSerialize(std::istream &is, u8 version)
  59         {
  60                 char buf[12];
  61                 // type
  62                 is.read(buf, 1);
  63                 type = buf[0];
  64                 // pos
  65                 is.read(buf, 12);
  66                 v3s32 intp = readV3S32((u8*)buf);
  67                 pos.X = (f32)intp.X/1000;
  68                 pos.Y = (f32)intp.Y/1000;
  69                 pos.Z = (f32)intp.Z/1000;
  70                 // data
  71                 data = deSerializeString(is);
  72         }
  73 };
  74
  75 class StaticObjectList
  76 {
  77 public:
  78         /*
  79                 Inserts an object to the container.
  80                 Id must be unique or 0.
  81         */
  82         void insert(u16 id, StaticObject obj)
  83         {
  84                 if(id == 0)
  85                 {
  86                         m_stored.push_back(obj);
  87                 }
  88                 else
  89                 {
  90                         if(m_active.find(id) != NULL)
  91                         {
  92                                 dstream<<"ERROR: StaticObjectList::insert(): "
  93                                                 <<"id already exists"<<std::endl;
  94                                 assert(0);
  95                                 return;
  96                         }
  97                         m_active.insert(id, obj);
  98                 }
  99         }
 100
 101         void remove(u16 id)
 102         {
 103                 assert(id != 0);
 104                 if(m_active.find(id) == NULL)
 105                 {
 106                         dstream<<"WARNING: StaticObjectList::remove(): id="<<id
 107                                         <<" not found"<<std::endl;
 108                         return;
 109                 }
 110                 m_active.remove(id);
 111         }
 112
 113         void serialize(std::ostream &os)
 114         {
 115                 char buf[12];
 116                 // version
 117                 buf[0] = 0;
 118                 os.write(buf, 1);
 119                 // count
 120                 u16 count = m_stored.size() + m_active.size();
 121                 writeU16((u8*)buf, count);
 122                 os.write(buf, 2);
 123                 for(core::list<StaticObject>::Iterator
 124                                 i = m_stored.begin();
 125                                 i != m_stored.end(); i++)
 126                 {
 127                         StaticObject &s_obj = *i;
 128                         s_obj.serialize(os);
 129                 }
 130                 for(core::map<u16, StaticObject>::Iterator
 131                                 i = m_active.getIterator();
 132                                 i.atEnd()==false; i++)
 133                 {
 134                         StaticObject s_obj = i.getNode()->getValue();
 135                         s_obj.serialize(os);
 136                 }
 137         }
 138         void deSerialize(std::istream &is)
 139         {
 140                 char buf[12];
 141                 // version
 142                 is.read(buf, 1);
 143                 u8 version = buf[0];
 144                 // count
 145                 is.read(buf, 2);
 146                 u16 count = readU16((u8*)buf);
 147                 for(u16 i=0; i<count; i++)
 148                 {
 149                         StaticObject s_obj;
 150                         s_obj.deSerialize(is, version);
 151                         m_stored.push_back(s_obj);
 152                 }
 153         }
 154
 155         /*
 156                 NOTE: When an object is transformed to active, it is removed
 157                 from m_stored and inserted to m_active.
 158                 The caller directly manipulates these containers.
 159         */
 160         core::list<StaticObject> m_stored;
 161         core::map<u16, StaticObject> m_active;
 162
 163 private:
 164 };
 165
 166 #endif
 167