src/tool.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2013 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 Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser 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 "itemdef.h"
  22 #include "itemgroup.h"
  23 #include "log.h"
  24 #include "inventory.h"
  25 #include "exceptions.h"
  26 #include "util/serialize.h"
  27 #include "util/numeric.h"
  28
  29 void ToolGroupCap::toJson(Json::Value &object) const
  30 {
  31         object["maxlevel"] = maxlevel;
  32         object["uses"] = uses;
  33
  34         Json::Value times_object;
  35         for (auto time : times)
  36                 times_object[time.first] = time.second;
  37         object["times"] = times_object;
  38 }
  39
  40 void ToolGroupCap::fromJson(const Json::Value &json)
  41 {
  42         if (json.isObject()) {
  43                 if (json["maxlevel"].isInt())
  44                         maxlevel = json["maxlevel"].asInt();
  45                 if (json["uses"].isInt())
  46                         uses = json["uses"].asInt();
  47                 const Json::Value &times_object = json["times"];
  48                 if (times_object.isArray()) {
  49                         Json::ArrayIndex size = times_object.size();
  50                         for (Json::ArrayIndex i = 0; i < size; ++i)
  51                                 if (times_object[i].isDouble())
  52                                         times[i] = times_object[i].asFloat();
  53                 }
  54         }
  55 }
  56
  57 void ToolCapabilities::serialize(std::ostream &os, u16 protocol_version) const
  58 {
  59         if (protocol_version >= 38)
  60                 writeU8(os, 5);
  61         else
  62                 writeU8(os, 4); // proto == 37
  63         writeF32(os, full_punch_interval);
  64         writeS16(os, max_drop_level);
  65         writeU32(os, groupcaps.size());
  66         for (const auto &groupcap : groupcaps) {
  67                 const std::string *name = &groupcap.first;
  68                 const ToolGroupCap *cap = &groupcap.second;
  69                 os << serializeString(*name);
  70                 writeS16(os, cap->uses);
  71                 writeS16(os, cap->maxlevel);
  72                 writeU32(os, cap->times.size());
  73                 for (const auto &time : cap->times) {
  74                         writeS16(os, time.first);
  75                         writeF32(os, time.second);
  76                 }
  77         }
  78
  79         writeU32(os, damageGroups.size());
  80
  81         for (const auto &damageGroup : damageGroups) {
  82                 os << serializeString(damageGroup.first);
  83                 writeS16(os, damageGroup.second);
  84         }
  85
  86         if (protocol_version >= 38)
  87                 writeU16(os, rangelim(punch_attack_uses, 0, U16_MAX));
  88 }
  89
  90 void ToolCapabilities::deSerialize(std::istream &is)
  91 {
  92         int version = readU8(is);
  93         if (version < 4)
  94                 throw SerializationError("unsupported ToolCapabilities version");
  95
  96         full_punch_interval = readF32(is);
  97         max_drop_level = readS16(is);
  98         groupcaps.clear();
  99         u32 groupcaps_size = readU32(is);
 100         for (u32 i = 0; i < groupcaps_size; i++) {
 101                 std::string name = deSerializeString(is);
 102                 ToolGroupCap cap;
 103                 cap.uses = readS16(is);
 104                 cap.maxlevel = readS16(is);
 105                 u32 times_size = readU32(is);
 106                 for(u32 i = 0; i < times_size; i++) {
 107                         int level = readS16(is);
 108                         float time = readF32(is);
 109                         cap.times[level] = time;
 110                 }
 111                 groupcaps[name] = cap;
 112         }
 113
 114         u32 damage_groups_size = readU32(is);
 115         for (u32 i = 0; i < damage_groups_size; i++) {
 116                 std::string name = deSerializeString(is);
 117                 s16 rating = readS16(is);
 118                 damageGroups[name] = rating;
 119         }
 120
 121         if (version >= 5)
 122                 punch_attack_uses = readU16(is);
 123 }
 124
 125 void ToolCapabilities::serializeJson(std::ostream &os) const
 126 {
 127         Json::Value root;
 128         root["full_punch_interval"] = full_punch_interval;
 129         root["max_drop_level"] = max_drop_level;
 130         root["punch_attack_uses"] = punch_attack_uses;
 131
 132         Json::Value groupcaps_object;
 133         for (const auto &groupcap : groupcaps) {
 134                 groupcap.second.toJson(groupcaps_object[groupcap.first]);
 135         }
 136         root["groupcaps"] = groupcaps_object;
 137
 138         Json::Value damage_groups_object;
 139         DamageGroup::const_iterator dgiter;
 140         for (dgiter = damageGroups.begin(); dgiter != damageGroups.end(); ++dgiter) {
 141                 damage_groups_object[dgiter->first] = dgiter->second;
 142         }
 143         root["damage_groups"] = damage_groups_object;
 144
 145         os << root;
 146 }
 147
 148 void ToolCapabilities::deserializeJson(std::istream &is)
 149 {
 150         Json::Value root;
 151         is >> root;
 152         if (root.isObject()) {
 153                 if (root["full_punch_interval"].isDouble())
 154                         full_punch_interval = root["full_punch_interval"].asFloat();
 155                 if (root["max_drop_level"].isInt())
 156                         max_drop_level = root["max_drop_level"].asInt();
 157                 if (root["punch_attack_uses"].isInt())
 158                         punch_attack_uses = root["punch_attack_uses"].asInt();
 159
 160                 Json::Value &groupcaps_object = root["groupcaps"];
 161                 if (groupcaps_object.isObject()) {
 162                         Json::ValueIterator gciter;
 163                         for (gciter = groupcaps_object.begin();
 164                                         gciter != groupcaps_object.end(); ++gciter) {
 165                                 ToolGroupCap groupcap;
 166                                 groupcap.fromJson(*gciter);
 167                                 groupcaps[gciter.key().asString()] = groupcap;
 168                         }
 169                 }
 170
 171                 Json::Value &damage_groups_object = root["damage_groups"];
 172                 if (damage_groups_object.isObject()) {
 173                         Json::ValueIterator dgiter;
 174                         for (dgiter = damage_groups_object.begin();
 175                                         dgiter != damage_groups_object.end(); ++dgiter) {
 176                                 Json::Value &value = *dgiter;
 177                                 if (value.isInt())
 178                                         damageGroups[dgiter.key().asString()] =
 179                                                 value.asInt();
 180                         }
 181                 }
 182         }
 183 }
 184
 185 DigParams getDigParams(const ItemGroupList &groups,
 186                 const ToolCapabilities *tp)
 187 {
 188         // Group dig_immediate defaults to fixed time and no wear
 189         if (tp->groupcaps.find("dig_immediate") == tp->groupcaps.cend()) {
 190                 switch (itemgroup_get(groups, "dig_immediate")) {
 191                 case 2:
 192                         return DigParams(true, 0.5, 0, "dig_immediate");
 193                 case 3:
 194                         return DigParams(true, 0, 0, "dig_immediate");
 195                 default:
 196                         break;
 197                 }
 198         }
 199
 200         // Values to be returned (with a bit of conversion)
 201         bool result_diggable = false;
 202         float result_time = 0.0;
 203         float result_wear = 0.0;
 204         std::string result_main_group;
 205
 206         int level = itemgroup_get(groups, "level");
 207         for (const auto &groupcap : tp->groupcaps) {
 208                 const ToolGroupCap &cap = groupcap.second;
 209
 210                 int leveldiff = cap.maxlevel - level;
 211                 if (leveldiff < 0)
 212                         continue;
 213
 214                 const std::string &groupname = groupcap.first;
 215                 float time = 0;
 216                 int rating = itemgroup_get(groups, groupname);
 217                 bool time_exists = cap.getTime(rating, &time);
 218                 if (!time_exists)
 219                         continue;
 220
 221                 if (leveldiff > 1)
 222                         time /= leveldiff;
 223                 if (!result_diggable || time < result_time) {
 224                         result_time = time;
 225                         result_diggable = true;
 226                         if (cap.uses != 0)
 227                                 result_wear = 1.0 / cap.uses / pow(3.0, leveldiff);
 228                         else
 229                                 result_wear = 0;
 230                         result_main_group = groupname;
 231                 }
 232         }
 233
 234         u16 wear_i = U16_MAX * result_wear;
 235         return DigParams(result_diggable, result_time, wear_i, result_main_group);
 236 }
 237
 238 HitParams getHitParams(const ItemGroupList &armor_groups,
 239                 const ToolCapabilities *tp, float time_from_last_punch)
 240 {
 241         s16 damage = 0;
 242         float result_wear = 0.0f;
 243         float punch_interval_multiplier =
 244                         rangelim(time_from_last_punch / tp->full_punch_interval, 0.0f, 1.0f);
 245
 246         for (const auto &damageGroup : tp->damageGroups) {
 247                 s16 armor = itemgroup_get(armor_groups, damageGroup.first);
 248                 damage += damageGroup.second * punch_interval_multiplier * armor / 100.0;
 249         }
 250
 251         if (tp->punch_attack_uses > 0)
 252                 result_wear = 1.0f / tp->punch_attack_uses * punch_interval_multiplier;
 253
 254         u16 wear_i = U16_MAX * result_wear;
 255         return {damage, wear_i};
 256 }
 257
 258 HitParams getHitParams(const ItemGroupList &armor_groups,
 259                 const ToolCapabilities *tp)
 260 {
 261         return getHitParams(armor_groups, tp, 1000000);
 262 }
 263
 264 PunchDamageResult getPunchDamage(
 265                 const ItemGroupList &armor_groups,
 266                 const ToolCapabilities *toolcap,
 267                 const ItemStack *punchitem,
 268                 float time_from_last_punch
 269 ){
 270         bool do_hit = true;
 271         {
 272                 if (do_hit && punchitem) {
 273                         if (itemgroup_get(armor_groups, "punch_operable") &&
 274                                         (toolcap == NULL || punchitem->name.empty()))
 275                                 do_hit = false;
 276                 }
 277
 278                 if (do_hit) {
 279                         if(itemgroup_get(armor_groups, "immortal"))
 280                                 do_hit = false;
 281                 }
 282         }
 283
 284         PunchDamageResult result;
 285         if(do_hit)
 286         {
 287                 HitParams hitparams = getHitParams(armor_groups, toolcap,
 288                                 time_from_last_punch);
 289                 result.did_punch = true;
 290                 result.wear = hitparams.wear;
 291                 result.damage = hitparams.hp;
 292         }
 293
 294         return result;
 295 }
 296
 297 f32 getToolRange(const ItemDefinition &def_selected, const ItemDefinition &def_hand)
 298 {
 299         float max_d = def_selected.range;
 300         float max_d_hand = def_hand.range;
 301
 302         if (max_d < 0 && max_d_hand >= 0)
 303                 max_d = max_d_hand;
 304         else if (max_d < 0)
 305                 max_d = 4.0f;
 306
 307         return max_d;
 308 }
 309