src/tool.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 "tool.h"
  21 #include "utility.h"
  22 #include "itemdef.h" // For itemgroup_get()
  23 #include "log.h"
  24
  25 void ToolCapabilities::serialize(std::ostream &os) const
  26 {
  27         writeU8(os, 0); // version
  28         writeF1000(os, full_punch_interval);
  29         writeS16(os, max_drop_level);
  30         writeU32(os, groupcaps.size());
  31         for(std::map<std::string, ToolGroupCap>::const_iterator
  32                         i = groupcaps.begin(); i != groupcaps.end(); i++){
  33                 const std::string *name = &i->first;
  34                 const ToolGroupCap *cap = &i->second;
  35                 os<<serializeString(*name);
  36                 writeF1000(os, cap->maxwear);
  37                 writeF1000(os, cap->maxlevel);
  38                 writeU32(os, cap->times.size());
  39                 for(std::map<int, float>::const_iterator
  40                                 i = cap->times.begin(); i != cap->times.end(); i++){
  41                         writeS16(os, i->first);
  42                         writeF1000(os, i->second);
  43                 }
  44         }
  45 }
  46
  47 void ToolCapabilities::deSerialize(std::istream &is)
  48 {
  49         int version = readU8(is);
  50         if(version != 0) throw SerializationError(
  51                         "unsupported ToolCapabilities version");
  52         full_punch_interval = readF1000(is);
  53         max_drop_level = readS16(is);
  54         groupcaps.clear();
  55         u32 groupcaps_size = readU32(is);
  56         for(u32 i=0; i<groupcaps_size; i++){
  57                 std::string name = deSerializeString(is);
  58                 ToolGroupCap cap;
  59                 cap.maxwear = readF1000(is);
  60                 cap.maxlevel = readF1000(is);
  61                 u32 times_size = readU32(is);
  62                 for(u32 i=0; i<times_size; i++){
  63                         int level = readS16(is);
  64                         float time = readF1000(is);
  65                         cap.times[level] = time;
  66                 }
  67                 groupcaps[name] = cap;
  68         }
  69 }
  70
  71 DigParams getDigParams(const ItemGroupList &groups,
  72                 const ToolCapabilities *tp, float time_from_last_punch)
  73 {
  74         //infostream<<"getDigParams"<<std::endl;
  75         /* Check group dig_immediate */
  76         switch(itemgroup_get(groups, "dig_immediate")){
  77         case 1:
  78                 //infostream<<"dig_immediate=1"<<std::endl;
  79                 return DigParams(true, 0.0, 0);
  80         case 2:
  81                 //infostream<<"dig_immediate=2"<<std::endl;
  82                 return DigParams(true, 1.0, 0);
  83         default:
  84                 break;
  85         }
  86
  87         // Values to be returned (with a bit of conversion)
  88         bool result_diggable = false;
  89         float result_time = 0.0;
  90         float result_wear = 0.0;
  91
  92         int level = itemgroup_get(groups, "level");
  93         //infostream<<"level="<<level<<std::endl;
  94         for(std::map<std::string, ToolGroupCap>::const_iterator
  95                         i = tp->groupcaps.begin(); i != tp->groupcaps.end(); i++){
  96                 const std::string &name = i->first;
  97                 //infostream<<"group="<<name<<std::endl;
  98                 const ToolGroupCap &cap = i->second;
  99                 int rating = itemgroup_get(groups, name);
 100                 float time = 0;
 101                 bool time_exists = cap.getTime(rating, &time);
 102                 if(!result_diggable || time < result_time){
 103                         if(cap.maxlevel > level && time_exists){
 104                                 result_diggable = true;
 105                                 result_time = time;
 106                                 int leveldiff = cap.maxlevel - level;
 107                                 result_wear = cap.maxwear / pow(4.0, (double)leveldiff);
 108                         }
 109                 }
 110         }
 111         //infostream<<"result_diggable="<<result_diggable<<std::endl;
 112         //infostream<<"result_time="<<result_time<<std::endl;
 113         //infostream<<"result_wear="<<result_wear<<std::endl;
 114
 115         if(time_from_last_punch < tp->full_punch_interval){
 116                 float f = time_from_last_punch / tp->full_punch_interval;
 117                 //infostream<<"f="<<f<<std::endl;
 118                 result_time /= f;
 119                 result_wear /= f;
 120         }
 121
 122         u16 wear_i = 65535.*result_wear;
 123         return DigParams(result_diggable, result_time, wear_i);
 124 }
 125
 126 DigParams getDigParams(const ItemGroupList &groups,
 127                 const ToolCapabilities *tp)
 128 {
 129         return getDigParams(groups, tp, 1000000);
 130 }
 131
 132 HitParams getHitParams(const ItemGroupList &groups,
 133                 const ToolCapabilities *tp, float time_from_last_punch)
 134 {
 135         DigParams digprop = getDigParams(groups, tp,
 136                         time_from_last_punch);
 137
 138         if(time_from_last_punch > tp->full_punch_interval)
 139                 time_from_last_punch = tp->full_punch_interval;
 140         // Damage in hp is equivalent to nodes dug in time_from_last_punch
 141         s16 hp = 0;
 142         if(digprop.diggable)
 143                 hp = time_from_last_punch / digprop.time;
 144         // Wear is the same as for digging a single node
 145         s16 wear = (float)digprop.wear;
 146
 147         return HitParams(hp, wear);
 148 }
 149
 150 HitParams getHitParams(const ItemGroupList &groups,
 151                 const ToolCapabilities *tp)
 152 {
 153         return getHitParams(groups, tp, 1000000);
 154 }
 155