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 "utility.h"
  24
  25 void MaterialProperties::serialize(std::ostream &os)
  26 {
  27         writeU8(os, 0); // version
  28         writeU8(os, diggability);
  29         writeF1000(os, constant_time);
  30         writeF1000(os, weight);
  31         writeF1000(os, crackiness);
  32         writeF1000(os, crumbliness);
  33         writeF1000(os, cuttability);
  34         writeF1000(os, flammability);
  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         flammability = readF1000(is);
  49 }
  50
  51 ToolDiggingProperties::ToolDiggingProperties(float full_punch_interval_,
  52                 float a, float b, float c, float d, float e,
  53                 float f, float g, float h, float i, float j):
  54         full_punch_interval(full_punch_interval_),
  55         basetime(a),
  56         dt_weight(b),
  57         dt_crackiness(c),
  58         dt_crumbliness(d),
  59         dt_cuttability(e),
  60         basedurability(f),
  61         dd_weight(g),
  62         dd_crackiness(h),
  63         dd_crumbliness(i),
  64         dd_cuttability(j)
  65 {}
  66
  67 void ToolDiggingProperties::serialize(std::ostream &os)
  68 {
  69         writeU8(os, 0); // version
  70         writeF1000(os, full_punch_interval);
  71         writeF1000(os, basetime);
  72         writeF1000(os, dt_weight);
  73         writeF1000(os, dt_crackiness);
  74         writeF1000(os, dt_crumbliness);
  75         writeF1000(os, dt_cuttability);
  76         writeF1000(os, basedurability);
  77         writeF1000(os, dd_weight);
  78         writeF1000(os, dd_crackiness);
  79         writeF1000(os, dd_crumbliness);
  80         writeF1000(os, dd_cuttability);
  81 }
  82
  83 void ToolDiggingProperties::deSerialize(std::istream &is)
  84 {
  85         int version = readU8(is);
  86         if(version != 0) throw SerializationError(
  87                         "unsupported ToolDiggingProperties version");
  88         full_punch_interval = readF1000(is);
  89         basetime = readF1000(is);
  90         dt_weight = readF1000(is);
  91         dt_crackiness = readF1000(is);
  92         dt_crumbliness = readF1000(is);
  93         dt_cuttability = readF1000(is);
  94         basedurability = readF1000(is);
  95         dd_weight = readF1000(is);
  96         dd_crackiness = readF1000(is);
  97         dd_crumbliness = readF1000(is);
  98         dd_cuttability = readF1000(is);
  99 }
 100
 101 DiggingProperties getDiggingProperties(const MaterialProperties *mp,
 102                 const ToolDiggingProperties *tp, float time_from_last_punch)
 103 {
 104         if(mp->diggability == DIGGABLE_NOT)
 105                 return DiggingProperties(false, 0, 0);
 106         if(mp->diggability == DIGGABLE_CONSTANT)
 107                 return DiggingProperties(true, mp->constant_time, 0);
 108
 109         float time = tp->basetime;
 110         time += tp->dt_weight * mp->weight;
 111         time += tp->dt_crackiness * mp->crackiness;
 112         time += tp->dt_crumbliness * mp->crumbliness;
 113         time += tp->dt_cuttability * mp->cuttability;
 114         if(time < 0.2)
 115                 time = 0.2;
 116
 117         float durability = tp->basedurability;
 118         durability += tp->dd_weight * mp->weight;
 119         durability += tp->dd_crackiness * mp->crackiness;
 120         durability += tp->dd_crumbliness * mp->crumbliness;
 121         durability += tp->dd_cuttability * mp->cuttability;
 122         if(durability < 1)
 123                 durability = 1;
 124
 125         if(time_from_last_punch < tp->full_punch_interval){
 126                 float f = time_from_last_punch / tp->full_punch_interval;
 127                 time /= f;
 128                 durability /= f;
 129         }
 130
 131         float wear = 1.0 / durability;
 132         u16 wear_i = 65535.*wear;
 133         return DiggingProperties(true, time, wear_i);
 134 }
 135
 136 DiggingProperties getDiggingProperties(const MaterialProperties *mp,
 137                 const ToolDiggingProperties *tp)
 138 {
 139         return getDiggingProperties(mp, tp, 1000000);
 140 }
 141
 142 DiggingProperties getDiggingProperties(u16 content,
 143                 const ToolDiggingProperties *tp, INodeDefManager *nodemgr)
 144 {
 145         const MaterialProperties &mp = nodemgr->get(content).material;
 146         return getDiggingProperties(&mp, tp);
 147 }
 148
 149 HittingProperties getHittingProperties(const MaterialProperties *mp,
 150                 const ToolDiggingProperties *tp, float time_from_last_punch)
 151 {
 152         DiggingProperties digprop = getDiggingProperties(mp, tp,
 153                         time_from_last_punch);
 154
 155         // If digging time would be 1 second, 2 hearts go in 1 second.
 156         s16 hp = 2.0 * 2.0 / digprop.time;
 157         // Wear is the same as for digging a single node
 158         s16 wear = (float)digprop.wear;
 159
 160         return HittingProperties(hp, wear);
 161 }
 162