src/mapnode.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010 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 "irrlichttypes_extrabloated.h"
  21 #include "mapnode.h"
  22 #include "porting.h"
  23 #include "main.h" // For g_settings
  24 #include "nodedef.h"
  25 #include "content_mapnode.h" // For mapnode_translate_*_internal
  26 #include "serialization.h" // For ser_ver_supported
  27 #include "util/serialize.h"
  28 #include <string>
  29 #include <sstream>
  30
  31 /*
  32         MapNode
  33 */
  34
  35 // Create directly from a nodename
  36 // If name is unknown, sets CONTENT_IGNORE
  37 MapNode::MapNode(INodeDefManager *ndef, const std::string &name,
  38                 u8 a_param1, u8 a_param2)
  39 {
  40         content_t id = CONTENT_IGNORE;
  41         ndef->getId(name, id);
  42         param0 = id;
  43         param1 = a_param1;
  44         param2 = a_param2;
  45 }
  46
  47 void MapNode::setLight(enum LightBank bank, u8 a_light, INodeDefManager *nodemgr)
  48 {
  49         // If node doesn't contain light data, ignore this
  50         if(nodemgr->get(*this).param_type != CPT_LIGHT)
  51                 return;
  52         if(bank == LIGHTBANK_DAY)
  53         {
  54                 param1 &= 0xf0;
  55                 param1 |= a_light & 0x0f;
  56         }
  57         else if(bank == LIGHTBANK_NIGHT)
  58         {
  59                 param1 &= 0x0f;
  60                 param1 |= (a_light & 0x0f)<<4;
  61         }
  62         else
  63                 assert(0);
  64 }
  65
  66 u8 MapNode::getLight(enum LightBank bank, INodeDefManager *nodemgr) const
  67 {
  68         // Select the brightest of [light source, propagated light]
  69         const ContentFeatures &f = nodemgr->get(*this);
  70         u8 light = 0;
  71         if(f.param_type == CPT_LIGHT)
  72         {
  73                 if(bank == LIGHTBANK_DAY)
  74                         light = param1 & 0x0f;
  75                 else if(bank == LIGHTBANK_NIGHT)
  76                         light = (param1>>4)&0x0f;
  77                 else
  78                         assert(0);
  79         }
  80         if(f.light_source > light)
  81                 light = f.light_source;
  82         return light;
  83 }
  84
  85 bool MapNode::getLightBanks(u8 &lightday, u8 &lightnight, INodeDefManager *nodemgr) const
  86 {
  87         // Select the brightest of [light source, propagated light]
  88         const ContentFeatures &f = nodemgr->get(*this);
  89         if(f.param_type == CPT_LIGHT)
  90         {
  91                 lightday = param1 & 0x0f;
  92                 lightnight = (param1>>4)&0x0f;
  93         }
  94         else
  95         {
  96                 lightday = 0;
  97                 lightnight = 0;
  98         }
  99         if(f.light_source > lightday)
 100                 lightday = f.light_source;
 101         if(f.light_source > lightnight)
 102                 lightnight = f.light_source;
 103         return f.param_type == CPT_LIGHT || f.light_source != 0;
 104 }
 105
 106 u8 MapNode::getFaceDir(INodeDefManager *nodemgr) const
 107 {
 108         const ContentFeatures &f = nodemgr->get(*this);
 109         if(f.param_type_2 == CPT2_FACEDIR)
 110                 return getParam2() & 0x03;
 111         return 0;
 112 }
 113
 114 u8 MapNode::getWallMounted(INodeDefManager *nodemgr) const
 115 {
 116         const ContentFeatures &f = nodemgr->get(*this);
 117         if(f.param_type_2 == CPT2_WALLMOUNTED)
 118                 return getParam2() & 0x07;
 119         return 0;
 120 }
 121
 122 v3s16 MapNode::getWallMountedDir(INodeDefManager *nodemgr) const
 123 {
 124         switch(getWallMounted(nodemgr))
 125         {
 126         case 0: default: return v3s16(0,1,0);
 127         case 1: return v3s16(0,-1,0);
 128         case 2: return v3s16(1,0,0);
 129         case 3: return v3s16(-1,0,0);
 130         case 4: return v3s16(0,0,1);
 131         case 5: return v3s16(0,0,-1);
 132         }
 133 }
 134
 135 static std::vector<aabb3f> transformNodeBox(const MapNode &n,
 136                 const NodeBox &nodebox, INodeDefManager *nodemgr)
 137 {
 138         std::vector<aabb3f> boxes;
 139         if(nodebox.type == NODEBOX_FIXED)
 140         {
 141                 const std::vector<aabb3f> &fixed = nodebox.fixed;
 142                 int facedir = n.getFaceDir(nodemgr);
 143                 for(std::vector<aabb3f>::const_iterator
 144                                 i = fixed.begin();
 145                                 i != fixed.end(); i++)
 146                 {
 147                         aabb3f box = *i;
 148                         if(facedir == 1)
 149                         {
 150                                 box.MinEdge.rotateXZBy(-90);
 151                                 box.MaxEdge.rotateXZBy(-90);
 152                                 box.repair();
 153                         }
 154                         else if(facedir == 2)
 155                         {
 156                                 box.MinEdge.rotateXZBy(180);
 157                                 box.MaxEdge.rotateXZBy(180);
 158                                 box.repair();
 159                         }
 160                         else if(facedir == 3)
 161                         {
 162                                 box.MinEdge.rotateXZBy(90);
 163                                 box.MaxEdge.rotateXZBy(90);
 164                                 box.repair();
 165                         }
 166                         boxes.push_back(box);
 167                 }
 168         }
 169         else if(nodebox.type == NODEBOX_WALLMOUNTED)
 170         {
 171                 v3s16 dir = n.getWallMountedDir(nodemgr);
 172
 173                 // top
 174                 if(dir == v3s16(0,1,0))
 175                 {
 176                         boxes.push_back(nodebox.wall_top);
 177                 }
 178                 // bottom
 179                 else if(dir == v3s16(0,-1,0))
 180                 {
 181                         boxes.push_back(nodebox.wall_bottom);
 182                 }
 183                 // side
 184                 else
 185                 {
 186                         v3f vertices[2] =
 187                         {
 188                                 nodebox.wall_side.MinEdge,
 189                                 nodebox.wall_side.MaxEdge
 190                         };
 191
 192                         for(s32 i=0; i<2; i++)
 193                         {
 194                                 if(dir == v3s16(-1,0,0))
 195                                         vertices[i].rotateXZBy(0);
 196                                 if(dir == v3s16(1,0,0))
 197                                         vertices[i].rotateXZBy(180);
 198                                 if(dir == v3s16(0,0,-1))
 199                                         vertices[i].rotateXZBy(90);
 200                                 if(dir == v3s16(0,0,1))
 201                                         vertices[i].rotateXZBy(-90);
 202                         }
 203
 204                         aabb3f box = aabb3f(vertices[0]);
 205                         box.addInternalPoint(vertices[1]);
 206                         boxes.push_back(box);
 207                 }
 208         }
 209         else // NODEBOX_REGULAR
 210         {
 211                 boxes.push_back(aabb3f(-BS/2,-BS/2,-BS/2,BS/2,BS/2,BS/2));
 212         }
 213         return boxes;
 214 }
 215
 216 std::vector<aabb3f> MapNode::getNodeBoxes(INodeDefManager *nodemgr) const
 217 {
 218         const ContentFeatures &f = nodemgr->get(*this);
 219         return transformNodeBox(*this, f.node_box, nodemgr);
 220 }
 221
 222 std::vector<aabb3f> MapNode::getSelectionBoxes(INodeDefManager *nodemgr) const
 223 {
 224         const ContentFeatures &f = nodemgr->get(*this);
 225         return transformNodeBox(*this, f.selection_box, nodemgr);
 226 }
 227
 228 u32 MapNode::serializedLength(u8 version)
 229 {
 230         if(!ser_ver_supported(version))
 231                 throw VersionMismatchException("ERROR: MapNode format not supported");
 232
 233         if(version == 0)
 234                 return 1;
 235         else if(version <= 9)
 236                 return 2;
 237         else if(version <= 23)
 238                 return 3;
 239         else
 240                 return 4;
 241 }
 242 void MapNode::serialize(u8 *dest, u8 version)
 243 {
 244         if(!ser_ver_supported(version))
 245                 throw VersionMismatchException("ERROR: MapNode format not supported");
 246
 247         // Can't do this anymore; we have 16-bit dynamically allocated node IDs
 248         // in memory; conversion just won't work in this direction.
 249         if(version < 24)
 250                 throw SerializationError("MapNode::serialize: serialization to "
 251                                 "version < 24 not possible");
 252
 253         writeU16(dest+0, param0);
 254         writeU8(dest+2, param1);
 255         writeU8(dest+3, param2);
 256 }
 257 void MapNode::deSerialize(u8 *source, u8 version)
 258 {
 259         if(!ser_ver_supported(version))
 260                 throw VersionMismatchException("ERROR: MapNode format not supported");
 261
 262         if(version <= 21)
 263         {
 264                 deSerialize_pre22(source, version);
 265                 return;
 266         }
 267
 268         if(version >= 24){
 269                 param0 = readU16(source+0);
 270                 param1 = readU8(source+2);
 271                 param2 = readU8(source+3);
 272         }
 273         else{
 274                 param0 = readU8(source+0);
 275                 param1 = readU8(source+1);
 276                 param2 = readU8(source+2);
 277                 if(param0 > 0x7F){
 278                         param0 |= ((param2&0xF0)<<4);
 279                         param2 &= 0x0F;
 280                 }
 281         }
 282 }
 283 void MapNode::serializeBulk(std::ostream &os, int version,
 284                 const MapNode *nodes, u32 nodecount,
 285                 u8 content_width, u8 params_width, bool compressed)
 286 {
 287         if(!ser_ver_supported(version))
 288                 throw VersionMismatchException("ERROR: MapNode format not supported");
 289
 290         assert(content_width == 2);
 291         assert(params_width == 2);
 292
 293         // Can't do this anymore; we have 16-bit dynamically allocated node IDs
 294         // in memory; conversion just won't work in this direction.
 295         if(version < 24)
 296                 throw SerializationError("MapNode::serializeBulk: serialization to "
 297                                 "version < 24 not possible");
 298
 299         SharedBuffer<u8> databuf(nodecount * (content_width + params_width));
 300
 301         // Serialize content
 302         for(u32 i=0; i<nodecount; i++)
 303                 writeU16(&databuf[i*2], nodes[i].param0);
 304
 305         // Serialize param1
 306         u32 start1 = content_width * nodecount;
 307         for(u32 i=0; i<nodecount; i++)
 308                 writeU8(&databuf[start1 + i], nodes[i].param1);
 309
 310         // Serialize param2
 311         u32 start2 = (content_width + 1) * nodecount;
 312         for(u32 i=0; i<nodecount; i++)
 313                 writeU8(&databuf[start2 + i], nodes[i].param2);
 314
 315         /*
 316                 Compress data to output stream
 317         */
 318
 319         if(compressed)
 320         {
 321                 compressZlib(databuf, os);
 322         }
 323         else
 324         {
 325                 os.write((const char*) &databuf[0], databuf.getSize());
 326         }
 327 }
 328
 329 // Deserialize bulk node data
 330 void MapNode::deSerializeBulk(std::istream &is, int version,
 331                 MapNode *nodes, u32 nodecount,
 332                 u8 content_width, u8 params_width, bool compressed)
 333 {
 334         if(!ser_ver_supported(version))
 335                 throw VersionMismatchException("ERROR: MapNode format not supported");
 336
 337         assert(version >= 22);
 338         assert(content_width == 1 || content_width == 2);
 339         assert(params_width == 2);
 340
 341         // Uncompress or read data
 342         u32 len = nodecount * (content_width + params_width);
 343         SharedBuffer<u8> databuf(len);
 344         if(compressed)
 345         {
 346                 std::ostringstream os(std::ios_base::binary);
 347                 decompressZlib(is, os);
 348                 std::string s = os.str();
 349                 if(s.size() != len)
 350                         throw SerializationError("deSerializeBulkNodes: "
 351                                         "decompress resulted in invalid size");
 352                 memcpy(&databuf[0], s.c_str(), len);
 353         }
 354         else
 355         {
 356                 is.read((char*) &databuf[0], len);
 357                 if(is.eof() || is.fail())
 358                         throw SerializationError("deSerializeBulkNodes: "
 359                                         "failed to read bulk node data");
 360         }
 361
 362         // Deserialize content
 363         if(content_width == 1)
 364         {
 365                 for(u32 i=0; i<nodecount; i++)
 366                         nodes[i].param0 = readU8(&databuf[i]);
 367         }
 368         else if(content_width == 2)
 369         {
 370                 for(u32 i=0; i<nodecount; i++)
 371                         nodes[i].param0 = readU16(&databuf[i*2]);
 372         }
 373
 374         // Deserialize param1
 375         u32 start1 = content_width * nodecount;
 376         for(u32 i=0; i<nodecount; i++)
 377                 nodes[i].param1 = readU8(&databuf[start1 + i]);
 378
 379         // Deserialize param2
 380         u32 start2 = (content_width + 1) * nodecount;
 381         if(content_width == 1)
 382         {
 383                 for(u32 i=0; i<nodecount; i++) {
 384                         nodes[i].param2 = readU8(&databuf[start2 + i]);
 385                         if(nodes[i].param0 > 0x7F){
 386                                 nodes[i].param0 <<= 4;
 387                                 nodes[i].param0 |= (nodes[i].param2&0xF0)>>4;
 388                                 nodes[i].param2 &= 0x0F;
 389                         }
 390                 }
 391         }
 392         else if(content_width == 2)
 393         {
 394                 for(u32 i=0; i<nodecount; i++)
 395                         nodes[i].param2 = readU8(&databuf[start2 + i]);
 396         }
 397 }
 398
 399 /*
 400         Legacy serialization
 401 */
 402 void MapNode::deSerialize_pre22(u8 *source, u8 version)
 403 {
 404         if(version <= 1)
 405         {
 406                 param0 = source[0];
 407         }
 408         else if(version <= 9)
 409         {
 410                 param0 = source[0];
 411                 param1 = source[1];
 412         }
 413         else
 414         {
 415                 param0 = source[0];
 416                 param1 = source[1];
 417                 param2 = source[2];
 418                 if(param0 > 0x7f){
 419                         param0 <<= 4;
 420                         param0 |= (param2&0xf0)>>4;
 421                         param2 &= 0x0f;
 422                 }
 423         }
 424
 425         // Convert special values from old version to new
 426         if(version <= 19)
 427         {
 428                 // In these versions, CONTENT_IGNORE and CONTENT_AIR
 429                 // are 255 and 254
 430                 // Version 19 is fucked up with sometimes the old values and sometimes not
 431                 if(param0 == 255)
 432                         param0 = CONTENT_IGNORE;
 433                 else if(param0 == 254)
 434                         param0 = CONTENT_AIR;
 435         }
 436
 437         // Translate to our known version
 438         *this = mapnode_translate_to_internal(*this, version);
 439 }