src/materials.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 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 #include "materials.h"
  21 #include "mapnode.h"
  22 #include "nodedef.h"
  23 #include "tooldef.h"
  24 #include "utility.h"
  25
  26 void MaterialProperties::serialize(std::ostream &os)
  27 {
  28         writeU8(os, 0); // version
  29         writeU8(os, diggability);
  30         writeF1000(os, constant_time);
  31         writeF1000(os, weight);
  32         writeF1000(os, crackiness);
  33         writeF1000(os, crumbliness);
  34         writeF1000(os, cuttability);
  35 }
  36
  37 void MaterialProperties::deSerialize(std::istream &is)
  38 {
  39         int version = readU8(is);
  40         if(version != 0)
  41                 throw SerializationError("unsupported MaterialProperties version");
  42         diggability = (enum Diggability)readU8(is);
  43         constant_time = readF1000(is);
  44         weight = readF1000(is);
  45         crackiness = readF1000(is);
  46         crumbliness = readF1000(is);
  47         cuttability = readF1000(is);
  48 }
  49
  50 DiggingProperties getDiggingProperties(u16 content, ToolDiggingProperties *tp,
  51                 INodeDefManager *nodemgr)
  52 {
  53         assert(tp);
  54         const MaterialProperties &mp = nodemgr->get(content).material;
  55         if(mp.diggability == DIGGABLE_NOT)
  56                 return DiggingProperties(false, 0, 0);
  57         if(mp.diggability == DIGGABLE_CONSTANT)
  58                 return DiggingProperties(true, mp.constant_time, 0);
  59
  60         float time = tp->basetime;
  61         time += tp->dt_weight * mp.weight;
  62         time += tp->dt_crackiness * mp.crackiness;
  63         time += tp->dt_crumbliness * mp.crumbliness;
  64         time += tp->dt_cuttability * mp.cuttability;
  65         if(time < 0.2)
  66                 time = 0.2;
  67
  68         float durability = tp->basedurability;
  69         durability += tp->dd_weight * mp.weight;
  70         durability += tp->dd_crackiness * mp.crackiness;
  71         durability += tp->dd_crumbliness * mp.crumbliness;
  72         durability += tp->dd_cuttability * mp.cuttability;
  73         if(durability < 1)
  74                 durability = 1;
  75
  76         float wear = 1.0 / durability;
  77         u16 wear_i = wear/65535.;
  78         return DiggingProperties(true, time, wear_i);
  79 }
  80