src/content_mapblock.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 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 "content_mapblock.h"
  21
  22 #include "main.h" // For g_settings
  23 #include "mapblock_mesh.h" // For MapBlock_LightColor() and MeshCollector
  24 #include "settings.h"
  25 #include "nodedef.h"
  26 #include "tile.h"
  27 #include "gamedef.h"
  28 #include "util/numeric.h"
  29 #include "util/directiontables.h"
  30
  31 // Create a cuboid.
  32 //  collector - the MeshCollector for the resulting polygons
  33 //  box       - the position and size of the box
  34 //  tiles     - the tiles (materials) to use (for all 6 faces)
  35 //  tilecount - number of entries in tiles, 1<=tilecount<=6
  36 //  c         - vertex colour - used for all
  37 //  txc       - texture coordinates - this is a list of texture coordinates
  38 //              for the opposite corners of each face - therefore, there
  39 //              should be (2+2)*6=24 values in the list. Alternatively, pass
  40 //              NULL to use the entire texture for each face. The order of
  41 //              the faces in the list is up-down-right-left-back-front
  42 //              (compatible with ContentFeatures). If you specified 0,0,1,1
  43 //              for each face, that would be the same as passing NULL.
  44 void makeCuboid(MeshCollector *collector, const aabb3f &box,
  45         TileSpec *tiles, int tilecount,
  46         video::SColor &c, const f32* txc)
  47 {
  48         assert(tilecount >= 1 && tilecount <= 6);
  49
  50         v3f min = box.MinEdge;
  51         v3f max = box.MaxEdge;
  52
  53
  54
  55         if(txc == NULL)
  56         {
  57                 static const f32 txc_default[24] = {
  58                         0,0,1,1,
  59                         0,0,1,1,
  60                         0,0,1,1,
  61                         0,0,1,1,
  62                         0,0,1,1,
  63                         0,0,1,1
  64                 };
  65                 txc = txc_default;
  66         }
  67
  68         video::S3DVertex vertices[24] =
  69         {
  70                 // up
  71                 video::S3DVertex(min.X,max.Y,max.Z, 0,1,0, c, txc[0],txc[1]),
  72                 video::S3DVertex(max.X,max.Y,max.Z, 0,1,0, c, txc[2],txc[1]),
  73                 video::S3DVertex(max.X,max.Y,min.Z, 0,1,0, c, txc[2],txc[3]),
  74                 video::S3DVertex(min.X,max.Y,min.Z, 0,1,0, c, txc[0],txc[3]),
  75                 // down
  76                 video::S3DVertex(min.X,min.Y,min.Z, 0,-1,0, c, txc[4],txc[5]),
  77                 video::S3DVertex(max.X,min.Y,min.Z, 0,-1,0, c, txc[6],txc[5]),
  78                 video::S3DVertex(max.X,min.Y,max.Z, 0,-1,0, c, txc[6],txc[7]),
  79                 video::S3DVertex(min.X,min.Y,max.Z, 0,-1,0, c, txc[4],txc[7]),
  80                 // right
  81                 video::S3DVertex(max.X,max.Y,min.Z, 1,0,0, c, txc[ 8],txc[9]),
  82                 video::S3DVertex(max.X,max.Y,max.Z, 1,0,0, c, txc[10],txc[9]),
  83                 video::S3DVertex(max.X,min.Y,max.Z, 1,0,0, c, txc[10],txc[11]),
  84                 video::S3DVertex(max.X,min.Y,min.Z, 1,0,0, c, txc[ 8],txc[11]),
  85                 // left
  86                 video::S3DVertex(min.X,max.Y,max.Z, -1,0,0, c, txc[12],txc[13]),
  87                 video::S3DVertex(min.X,max.Y,min.Z, -1,0,0, c, txc[14],txc[13]),
  88                 video::S3DVertex(min.X,min.Y,min.Z, -1,0,0, c, txc[14],txc[15]),
  89                 video::S3DVertex(min.X,min.Y,max.Z, -1,0,0, c, txc[12],txc[15]),
  90                 // back
  91                 video::S3DVertex(max.X,max.Y,max.Z, 0,0,1, c, txc[16],txc[17]),
  92                 video::S3DVertex(min.X,max.Y,max.Z, 0,0,1, c, txc[18],txc[17]),
  93                 video::S3DVertex(min.X,min.Y,max.Z, 0,0,1, c, txc[18],txc[19]),
  94                 video::S3DVertex(max.X,min.Y,max.Z, 0,0,1, c, txc[16],txc[19]),
  95                 // front
  96                 video::S3DVertex(min.X,max.Y,min.Z, 0,0,-1, c, txc[20],txc[21]),
  97                 video::S3DVertex(max.X,max.Y,min.Z, 0,0,-1, c, txc[22],txc[21]),
  98                 video::S3DVertex(max.X,min.Y,min.Z, 0,0,-1, c, txc[22],txc[23]),
  99                 video::S3DVertex(min.X,min.Y,min.Z, 0,0,-1, c, txc[20],txc[23]),
 100         };
 101
 102         for(int i = 0; i < tilecount; i++)
 103                                 {
 104                                 switch (tiles[i].rotation)
 105                                 {
 106                                 case 0:
 107                                         break;
 108                                 case 1: //R90
 109                                         for (int x = 0; x < 4; x++)
 110                                                 vertices[i*4+x].TCoords.rotateBy(90,irr::core::vector2df(0, 0));
 111                                         break;
 112                                 case 2: //R180
 113                                         for (int x = 0; x < 4; x++)
 114                                                 vertices[i*4+x].TCoords.rotateBy(180,irr::core::vector2df(0, 0));
 115                                         break;
 116                                 case 3: //R270
 117                                         for (int x = 0; x < 4; x++)
 118                                                 vertices[i*4+x].TCoords.rotateBy(270,irr::core::vector2df(0, 0));
 119                                         break;
 120                                 case 4: //FXR90
 121                                         for (int x = 0; x < 4; x++){
 122                                                 vertices[i*4+x].TCoords.X = 1.0 - vertices[i*4+x].TCoords.X;
 123                                                 vertices[i*4+x].TCoords.rotateBy(90,irr::core::vector2df(0, 0));
 124                                         }
 125                                         break;
 126                                 case 5: //FXR270
 127                                         for (int x = 0; x < 4; x++){
 128                                                 vertices[i*4+x].TCoords.X = 1.0 - vertices[i*4+x].TCoords.X;
 129                                                 vertices[i*4+x].TCoords.rotateBy(270,irr::core::vector2df(0, 0));
 130                                         }
 131                                         break;
 132                                 case 6: //FYR90
 133                                         for (int x = 0; x < 4; x++){
 134                                                 vertices[i*4+x].TCoords.Y = 1.0 - vertices[i*4+x].TCoords.Y;
 135                                                 vertices[i*4+x].TCoords.rotateBy(90,irr::core::vector2df(0, 0));
 136                                         }
 137                                         break;
 138                                 case 7: //FYR270
 139                                         for (int x = 0; x < 4; x++){
 140                                                 vertices[i*4+x].TCoords.Y = 1.0 - vertices[i*4+x].TCoords.Y;
 141                                                 vertices[i*4+x].TCoords.rotateBy(270,irr::core::vector2df(0, 0));
 142                                         }
 143                                         break;
 144                                 case 8: //FX
 145                                         for (int x = 0; x < 4; x++){
 146                                                 vertices[i*4+x].TCoords.X = 1.0 - vertices[i*4+x].TCoords.X;
 147                                         }
 148                                         break;
 149                                 case 9: //FY
 150                                         for (int x = 0; x < 4; x++){
 151                                                 vertices[i*4+x].TCoords.Y = 1.0 - vertices[i*4+x].TCoords.Y;
 152                                         }
 153                                         break;
 154                                 default:
 155                                         break;
 156                                 }
 157                         }
 158         u16 indices[] = {0,1,2,2,3,0};
 159         // Add to mesh collector
 160         for(s32 j=0; j<24; j+=4)
 161         {
 162                 int tileindex = MYMIN(j/4, tilecount-1);
 163                 collector->append(tiles[tileindex],
 164                                 vertices+j, 4, indices, 6);
 165         }
 166 }
 167
 168 void mapblock_mesh_generate_special(MeshMakeData *data,
 169                 MeshCollector &collector)
 170 {
 171         INodeDefManager *nodedef = data->m_gamedef->ndef();
 172
 173         // 0ms
 174         //TimeTaker timer("mapblock_mesh_generate_special()");
 175
 176         /*
 177                 Some settings
 178         */
 179         bool new_style_water = g_settings->getBool("new_style_water");
 180
 181         float node_liquid_level = 1.0;
 182         if(new_style_water)
 183                 node_liquid_level = 0.85;
 184
 185         v3s16 blockpos_nodes = data->m_blockpos*MAP_BLOCKSIZE;
 186
 187         for(s16 z=0; z<MAP_BLOCKSIZE; z++)
 188         for(s16 y=0; y<MAP_BLOCKSIZE; y++)
 189         for(s16 x=0; x<MAP_BLOCKSIZE; x++)
 190         {
 191                 v3s16 p(x,y,z);
 192
 193                 MapNode n = data->m_vmanip.getNodeNoEx(blockpos_nodes+p);
 194                 const ContentFeatures &f = nodedef->get(n);
 195
 196                 // Only solidness=0 stuff is drawn here
 197                 if(f.solidness != 0)
 198                         continue;
 199
 200                 switch(f.drawtype){
 201                 default:
 202                         infostream<<"Got "<<f.drawtype<<std::endl;
 203                         assert(0);
 204                         break;
 205                 case NDT_AIRLIKE:
 206                         break;
 207                 case NDT_LIQUID:
 208                 {
 209                         /*
 210                                 Add water sources to mesh if using new style
 211                         */
 212                         TileSpec tile_liquid = f.special_tiles[0];
 213                         TileSpec tile_liquid_bfculled = getNodeTile(n, p, v3s16(0,0,0), data);
 214
 215                         bool top_is_same_liquid = false;
 216                         MapNode ntop = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y+1,z));
 217                         content_t c_flowing = nodedef->getId(f.liquid_alternative_flowing);
 218                         content_t c_source = nodedef->getId(f.liquid_alternative_source);
 219                         if(ntop.getContent() == c_flowing || ntop.getContent() == c_source)
 220                                 top_is_same_liquid = true;
 221
 222                         u16 l = getInteriorLight(n, 0, data);
 223                         video::SColor c = MapBlock_LightColor(f.alpha, l, decode_light(f.light_source));
 224
 225                         /*
 226                                 Generate sides
 227                          */
 228                         v3s16 side_dirs[4] = {
 229                                 v3s16(1,0,0),
 230                                 v3s16(-1,0,0),
 231                                 v3s16(0,0,1),
 232                                 v3s16(0,0,-1),
 233                         };
 234                         for(u32 i=0; i<4; i++)
 235                         {
 236                                 v3s16 dir = side_dirs[i];
 237
 238                                 MapNode neighbor = data->m_vmanip.getNodeNoEx(blockpos_nodes + p + dir);
 239                                 content_t neighbor_content = neighbor.getContent();
 240                                 const ContentFeatures &n_feat = nodedef->get(neighbor_content);
 241                                 MapNode n_top = data->m_vmanip.getNodeNoEx(blockpos_nodes + p + dir+ v3s16(0,1,0));
 242                                 content_t n_top_c = n_top.getContent();
 243
 244                                 if(neighbor_content == CONTENT_IGNORE)
 245                                         continue;
 246
 247                                 /*
 248                                         If our topside is liquid and neighbor's topside
 249                                         is liquid, don't draw side face
 250                                 */
 251                                 if(top_is_same_liquid && (n_top_c == c_flowing ||
 252                                                 n_top_c == c_source || n_top_c == CONTENT_IGNORE))
 253                                         continue;
 254
 255                                 // Don't draw face if neighbor is blocking the view
 256                                 if(n_feat.solidness == 2)
 257                                         continue;
 258
 259                                 bool neighbor_is_same_liquid = (neighbor_content == c_source
 260                                                 || neighbor_content == c_flowing);
 261
 262                                 // Don't draw any faces if neighbor same is liquid and top is
 263                                 // same liquid
 264                                 if(neighbor_is_same_liquid && !top_is_same_liquid)
 265                                         continue;
 266
 267                                 // Use backface culled material if neighbor doesn't have a
 268                                 // solidness of 0
 269                                 const TileSpec *current_tile = &tile_liquid;
 270                                 if(n_feat.solidness != 0 || n_feat.visual_solidness != 0)
 271                                         current_tile = &tile_liquid_bfculled;
 272
 273                                 video::S3DVertex vertices[4] =
 274                                 {
 275                                         video::S3DVertex(-BS/2,0,BS/2,0,0,0, c, 0,1),
 276                                         video::S3DVertex(BS/2,0,BS/2,0,0,0, c, 1,1),
 277                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,0),
 278                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,0),
 279                                 };
 280
 281                                 /*
 282                                         If our topside is liquid, set upper border of face
 283                                         at upper border of node
 284                                 */
 285                                 if(top_is_same_liquid)
 286                                 {
 287                                         vertices[2].Pos.Y = 0.5*BS;
 288                                         vertices[3].Pos.Y = 0.5*BS;
 289                                 }
 290                                 /*
 291                                         Otherwise upper position of face is liquid level
 292                                 */
 293                                 else
 294                                 {
 295                                         vertices[2].Pos.Y = (node_liquid_level-0.5)*BS;
 296                                         vertices[3].Pos.Y = (node_liquid_level-0.5)*BS;
 297                                 }
 298                                 /*
 299                                         If neighbor is liquid, lower border of face is liquid level
 300                                 */
 301                                 if(neighbor_is_same_liquid)
 302                                 {
 303                                         vertices[0].Pos.Y = (node_liquid_level-0.5)*BS;
 304                                         vertices[1].Pos.Y = (node_liquid_level-0.5)*BS;
 305                                 }
 306                                 /*
 307                                         If neighbor is not liquid, lower border of face is
 308                                         lower border of node
 309                                 */
 310                                 else
 311                                 {
 312                                         vertices[0].Pos.Y = -0.5*BS;
 313                                         vertices[1].Pos.Y = -0.5*BS;
 314                                 }
 315
 316                                 for(s32 j=0; j<4; j++)
 317                                 {
 318                                         if(dir == v3s16(0,0,1))
 319                                                 vertices[j].Pos.rotateXZBy(0);
 320                                         if(dir == v3s16(0,0,-1))
 321                                                 vertices[j].Pos.rotateXZBy(180);
 322                                         if(dir == v3s16(-1,0,0))
 323                                                 vertices[j].Pos.rotateXZBy(90);
 324                                         if(dir == v3s16(1,0,-0))
 325                                                 vertices[j].Pos.rotateXZBy(-90);
 326
 327                                         // Do this to not cause glitches when two liquids are
 328                                         // side-by-side
 329                                         /*if(neighbor_is_same_liquid == false){
 330                                                 vertices[j].Pos.X *= 0.98;
 331                                                 vertices[j].Pos.Z *= 0.98;
 332                                         }*/
 333
 334                                         vertices[j].Pos += intToFloat(p, BS);
 335                                 }
 336
 337                                 u16 indices[] = {0,1,2,2,3,0};
 338                                 // Add to mesh collector
 339                                 collector.append(*current_tile, vertices, 4, indices, 6);
 340                         }
 341
 342                         /*
 343                                 Generate top
 344                          */
 345                         if(top_is_same_liquid)
 346                                 continue;
 347
 348                         video::S3DVertex vertices[4] =
 349                         {
 350                                 video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,1),
 351                                 video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,1),
 352                                 video::S3DVertex(BS/2,0,-BS/2, 0,0,0, c, 1,0),
 353                                 video::S3DVertex(-BS/2,0,-BS/2, 0,0,0, c, 0,0),
 354                         };
 355
 356                         v3f offset(p.X*BS, p.Y*BS + (-0.5+node_liquid_level)*BS, p.Z*BS);
 357                         for(s32 i=0; i<4; i++)
 358                         {
 359                                 vertices[i].Pos += offset;
 360                         }
 361
 362                         u16 indices[] = {0,1,2,2,3,0};
 363                         // Add to mesh collector
 364                         collector.append(tile_liquid, vertices, 4, indices, 6);
 365                 break;}
 366                 case NDT_FLOWINGLIQUID:
 367                 {
 368                         /*
 369                                 Add flowing liquid to mesh
 370                         */
 371                         TileSpec tile_liquid = f.special_tiles[0];
 372                         TileSpec tile_liquid_bfculled = f.special_tiles[1];
 373
 374                         bool top_is_same_liquid = false;
 375                         MapNode ntop = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y+1,z));
 376                         content_t c_flowing = nodedef->getId(f.liquid_alternative_flowing);
 377                         content_t c_source = nodedef->getId(f.liquid_alternative_source);
 378                         if(ntop.getContent() == c_flowing || ntop.getContent() == c_source)
 379                                 top_is_same_liquid = true;
 380
 381                         u16 l = 0;
 382                         // If this liquid emits light and doesn't contain light, draw
 383                         // it at what it emits, for an increased effect
 384                         u8 light_source = nodedef->get(n).light_source;
 385                         if(light_source != 0){
 386                                 //l = decode_light(undiminish_light(light_source));
 387                                 l = decode_light(light_source);
 388                                 l = l | (l<<8);
 389                         }
 390                         // Use the light of the node on top if possible
 391                         else if(nodedef->get(ntop).param_type == CPT_LIGHT)
 392                                 l = getInteriorLight(ntop, 0, data);
 393                         // Otherwise use the light of this node (the liquid)
 394                         else
 395                                 l = getInteriorLight(n, 0, data);
 396                         video::SColor c = MapBlock_LightColor(f.alpha, l, decode_light(f.light_source));
 397
 398                         u8 range = rangelim(nodedef->get(c_flowing).liquid_range, 0, 8);
 399
 400                         // Neighbor liquid levels (key = relative position)
 401                         // Includes current node
 402                         std::map<v3s16, f32> neighbor_levels;
 403                         std::map<v3s16, content_t> neighbor_contents;
 404                         std::map<v3s16, u8> neighbor_flags;
 405                         const u8 neighborflag_top_is_same_liquid = 0x01;
 406                         v3s16 neighbor_dirs[9] = {
 407                                 v3s16(0,0,0),
 408                                 v3s16(0,0,1),
 409                                 v3s16(0,0,-1),
 410                                 v3s16(1,0,0),
 411                                 v3s16(-1,0,0),
 412                                 v3s16(1,0,1),
 413                                 v3s16(-1,0,-1),
 414                                 v3s16(1,0,-1),
 415                                 v3s16(-1,0,1),
 416                         };
 417                         for(u32 i=0; i<9; i++)
 418                         {
 419                                 content_t content = CONTENT_AIR;
 420                                 float level = -0.5 * BS;
 421                                 u8 flags = 0;
 422                                 // Check neighbor
 423                                 v3s16 p2 = p + neighbor_dirs[i];
 424                                 MapNode n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
 425                                 if(n2.getContent() != CONTENT_IGNORE)
 426                                 {
 427                                         content = n2.getContent();
 428
 429                                         if(n2.getContent() == c_source)
 430                                                 level = (-0.5+node_liquid_level) * BS;
 431                                         else if(n2.getContent() == c_flowing){
 432                                                 u8 liquid_level = (n2.param2&LIQUID_LEVEL_MASK) - (LIQUID_LEVEL_MAX+1-range);
 433                                                 level = (-0.5 + ((float)liquid_level+ 0.5) / (float)range * node_liquid_level) * BS;
 434                                         }
 435
 436                                         // Check node above neighbor.
 437                                         // NOTE: This doesn't get executed if neighbor
 438                                         //       doesn't exist
 439                                         p2.Y += 1;
 440                                         n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
 441                                         if(n2.getContent() == c_source ||
 442                                                         n2.getContent() == c_flowing)
 443                                                 flags |= neighborflag_top_is_same_liquid;
 444                                 }
 445
 446                                 neighbor_levels[neighbor_dirs[i]] = level;
 447                                 neighbor_contents[neighbor_dirs[i]] = content;
 448                                 neighbor_flags[neighbor_dirs[i]] = flags;
 449                         }
 450
 451                         // Corner heights (average between four liquids)
 452                         f32 corner_levels[4];
 453
 454                         v3s16 halfdirs[4] = {
 455                                 v3s16(0,0,0),
 456                                 v3s16(1,0,0),
 457                                 v3s16(1,0,1),
 458                                 v3s16(0,0,1),
 459                         };
 460                         for(u32 i=0; i<4; i++)
 461                         {
 462                                 v3s16 cornerdir = halfdirs[i];
 463                                 float cornerlevel = 0;
 464                                 u32 valid_count = 0;
 465                                 u32 air_count = 0;
 466                                 for(u32 j=0; j<4; j++)
 467                                 {
 468                                         v3s16 neighbordir = cornerdir - halfdirs[j];
 469                                         content_t content = neighbor_contents[neighbordir];
 470                                         // If top is liquid, draw starting from top of node
 471                                         if(neighbor_flags[neighbordir] &
 472                                                         neighborflag_top_is_same_liquid)
 473                                         {
 474                                                 cornerlevel = 0.5*BS;
 475                                                 valid_count = 1;
 476                                                 break;
 477                                         }
 478                                         // Source is always the same height
 479                                         else if(content == c_source)
 480                                         {
 481                                                 cornerlevel = (-0.5+node_liquid_level)*BS;
 482                                                 valid_count = 1;
 483                                                 break;
 484                                         }
 485                                         // Flowing liquid has level information
 486                                         else if(content == c_flowing)
 487                                         {
 488                                                 cornerlevel += neighbor_levels[neighbordir];
 489                                                 valid_count++;
 490                                         }
 491                                         else if(content == CONTENT_AIR)
 492                                         {
 493                                                 air_count++;
 494                                         }
 495                                 }
 496                                 if(air_count >= 2)
 497                                         cornerlevel = -0.5*BS+0.2;
 498                                 else if(valid_count > 0)
 499                                         cornerlevel /= valid_count;
 500                                 corner_levels[i] = cornerlevel;
 501                         }
 502
 503                         /*
 504                                 Generate sides
 505                         */
 506
 507                         v3s16 side_dirs[4] = {
 508                                 v3s16(1,0,0),
 509                                 v3s16(-1,0,0),
 510                                 v3s16(0,0,1),
 511                                 v3s16(0,0,-1),
 512                         };
 513                         s16 side_corners[4][2] = {
 514                                 {1, 2},
 515                                 {3, 0},
 516                                 {2, 3},
 517                                 {0, 1},
 518                         };
 519                         for(u32 i=0; i<4; i++)
 520                         {
 521                                 v3s16 dir = side_dirs[i];
 522
 523                                 /*
 524                                         If our topside is liquid and neighbor's topside
 525                                         is liquid, don't draw side face
 526                                 */
 527                                 if(top_is_same_liquid &&
 528                                                 neighbor_flags[dir] & neighborflag_top_is_same_liquid)
 529                                         continue;
 530
 531                                 content_t neighbor_content = neighbor_contents[dir];
 532                                 const ContentFeatures &n_feat = nodedef->get(neighbor_content);
 533
 534                                 // Don't draw face if neighbor is blocking the view
 535                                 if(n_feat.solidness == 2)
 536                                         continue;
 537
 538                                 bool neighbor_is_same_liquid = (neighbor_content == c_source
 539                                                 || neighbor_content == c_flowing);
 540
 541                                 // Don't draw any faces if neighbor same is liquid and top is
 542                                 // same liquid
 543                                 if(neighbor_is_same_liquid == true
 544                                                 && top_is_same_liquid == false)
 545                                         continue;
 546
 547                                 // Use backface culled material if neighbor doesn't have a
 548                                 // solidness of 0
 549                                 const TileSpec *current_tile = &tile_liquid;
 550                                 if(n_feat.solidness != 0 || n_feat.visual_solidness != 0)
 551                                         current_tile = &tile_liquid_bfculled;
 552
 553                                 video::S3DVertex vertices[4] =
 554                                 {
 555                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,1),
 556                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,1),
 557                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,0),
 558                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,0),
 559                                 };
 560
 561                                 /*
 562                                         If our topside is liquid, set upper border of face
 563                                         at upper border of node
 564                                 */
 565                                 if(top_is_same_liquid)
 566                                 {
 567                                         vertices[2].Pos.Y = 0.5*BS;
 568                                         vertices[3].Pos.Y = 0.5*BS;
 569                                 }
 570                                 /*
 571                                         Otherwise upper position of face is corner levels
 572                                 */
 573                                 else
 574                                 {
 575                                         vertices[2].Pos.Y = corner_levels[side_corners[i][0]];
 576                                         vertices[3].Pos.Y = corner_levels[side_corners[i][1]];
 577                                 }
 578
 579                                 /*
 580                                         If neighbor is liquid, lower border of face is corner
 581                                         liquid levels
 582                                 */
 583                                 if(neighbor_is_same_liquid)
 584                                 {
 585                                         vertices[0].Pos.Y = corner_levels[side_corners[i][1]];
 586                                         vertices[1].Pos.Y = corner_levels[side_corners[i][0]];
 587                                 }
 588                                 /*
 589                                         If neighbor is not liquid, lower border of face is
 590                                         lower border of node
 591                                 */
 592                                 else
 593                                 {
 594                                         vertices[0].Pos.Y = -0.5*BS;
 595                                         vertices[1].Pos.Y = -0.5*BS;
 596                                 }
 597
 598                                 for(s32 j=0; j<4; j++)
 599                                 {
 600                                         if(dir == v3s16(0,0,1))
 601                                                 vertices[j].Pos.rotateXZBy(0);
 602                                         if(dir == v3s16(0,0,-1))
 603                                                 vertices[j].Pos.rotateXZBy(180);
 604                                         if(dir == v3s16(-1,0,0))
 605                                                 vertices[j].Pos.rotateXZBy(90);
 606                                         if(dir == v3s16(1,0,-0))
 607                                                 vertices[j].Pos.rotateXZBy(-90);
 608
 609                                         // Do this to not cause glitches when two liquids are
 610                                         // side-by-side
 611                                         /*if(neighbor_is_same_liquid == false){
 612                                                 vertices[j].Pos.X *= 0.98;
 613                                                 vertices[j].Pos.Z *= 0.98;
 614                                         }*/
 615
 616                                         vertices[j].Pos += intToFloat(p, BS);
 617                                 }
 618
 619                                 u16 indices[] = {0,1,2,2,3,0};
 620                                 // Add to mesh collector
 621                                 collector.append(*current_tile, vertices, 4, indices, 6);
 622                         }
 623
 624                         /*
 625                                 Generate top side, if appropriate
 626                         */
 627
 628                         if(top_is_same_liquid == false)
 629                         {
 630                                 video::S3DVertex vertices[4] =
 631                                 {
 632                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,1),
 633                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,1),
 634                                         video::S3DVertex(BS/2,0,-BS/2, 0,0,0, c, 1,0),
 635                                         video::S3DVertex(-BS/2,0,-BS/2, 0,0,0, c, 0,0),
 636                                 };
 637
 638                                 // To get backface culling right, the vertices need to go
 639                                 // clockwise around the front of the face. And we happened to
 640                                 // calculate corner levels in exact reverse order.
 641                                 s32 corner_resolve[4] = {3,2,1,0};
 642
 643                                 for(s32 i=0; i<4; i++)
 644                                 {
 645                                         //vertices[i].Pos.Y += liquid_level;
 646                                         //vertices[i].Pos.Y += neighbor_levels[v3s16(0,0,0)];
 647                                         s32 j = corner_resolve[i];
 648                                         vertices[i].Pos.Y += corner_levels[j];
 649                                         vertices[i].Pos += intToFloat(p, BS);
 650                                 }
 651
 652                                 // Default downwards-flowing texture animation goes from
 653                                 // -Z towards +Z, thus the direction is +Z.
 654                                 // Rotate texture to make animation go in flow direction
 655                                 // Positive if liquid moves towards +Z
 656                                 f32 dz = (corner_levels[side_corners[3][0]] +
 657                                                 corner_levels[side_corners[3][1]]) -
 658                                                 (corner_levels[side_corners[2][0]] +
 659                                                 corner_levels[side_corners[2][1]]);
 660                                 // Positive if liquid moves towards +X
 661                                 f32 dx = (corner_levels[side_corners[1][0]] +
 662                                                 corner_levels[side_corners[1][1]]) -
 663                                                 (corner_levels[side_corners[0][0]] +
 664                                                 corner_levels[side_corners[0][1]]);
 665                                 f32 tcoord_angle = atan2(dz, dx) * core::RADTODEG ;
 666                                 v2f tcoord_center(0.5, 0.5);
 667                                 v2f tcoord_translate(
 668                                                 blockpos_nodes.Z + z,
 669                                                 blockpos_nodes.X + x);
 670                                 tcoord_translate.rotateBy(tcoord_angle);
 671                                 tcoord_translate.X -= floor(tcoord_translate.X);
 672                                 tcoord_translate.Y -= floor(tcoord_translate.Y);
 673
 674                                 for(s32 i=0; i<4; i++)
 675                                 {
 676                                         vertices[i].TCoords.rotateBy(
 677                                                         tcoord_angle,
 678                                                         tcoord_center);
 679                                         vertices[i].TCoords += tcoord_translate;
 680                                 }
 681
 682                                 v2f t = vertices[0].TCoords;
 683                                 vertices[0].TCoords = vertices[2].TCoords;
 684                                 vertices[2].TCoords = t;
 685
 686                                 u16 indices[] = {0,1,2,2,3,0};
 687                                 // Add to mesh collector
 688                                 collector.append(tile_liquid, vertices, 4, indices, 6);
 689                         }
 690                 break;}
 691                 case NDT_GLASSLIKE:
 692                 {
 693                         TileSpec tile = getNodeTile(n, p, v3s16(0,0,0), data);
 694
 695                         u16 l = getInteriorLight(n, 1, data);
 696                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 697
 698                         for(u32 j=0; j<6; j++)
 699                         {
 700                                 // Check this neighbor
 701                                 v3s16 n2p = blockpos_nodes + p + g_6dirs[j];
 702                                 MapNode n2 = data->m_vmanip.getNodeNoEx(n2p);
 703                                 // Don't make face if neighbor is of same type
 704                                 if(n2.getContent() == n.getContent())
 705                                         continue;
 706
 707                                 // The face at Z+
 708                                 video::S3DVertex vertices[4] = {
 709                                         video::S3DVertex(-BS/2,-BS/2,BS/2, 0,0,0, c, 0,1),
 710                                         video::S3DVertex(BS/2,-BS/2,BS/2, 0,0,0, c, 1,1),
 711                                         video::S3DVertex(BS/2,BS/2,BS/2, 0,0,0, c, 1,0),
 712                                         video::S3DVertex(-BS/2,BS/2,BS/2, 0,0,0, c, 0,0),
 713                                 };
 714
 715                                 // Rotations in the g_6dirs format
 716                                 if(j == 0) // Z+
 717                                         for(u16 i=0; i<4; i++)
 718                                                 vertices[i].Pos.rotateXZBy(0);
 719                                 else if(j == 1) // Y+
 720                                         for(u16 i=0; i<4; i++)
 721                                                 vertices[i].Pos.rotateYZBy(-90);
 722                                 else if(j == 2) // X+
 723                                         for(u16 i=0; i<4; i++)
 724                                                 vertices[i].Pos.rotateXZBy(-90);
 725                                 else if(j == 3) // Z-
 726                                         for(u16 i=0; i<4; i++)
 727                                                 vertices[i].Pos.rotateXZBy(180);
 728                                 else if(j == 4) // Y-
 729                                         for(u16 i=0; i<4; i++)
 730                                                 vertices[i].Pos.rotateYZBy(90);
 731                                 else if(j == 5) // X-
 732                                         for(u16 i=0; i<4; i++)
 733                                                 vertices[i].Pos.rotateXZBy(90);
 734
 735                                 for(u16 i=0; i<4; i++){
 736                                         vertices[i].Pos += intToFloat(p, BS);
 737                                 }
 738
 739                                 u16 indices[] = {0,1,2,2,3,0};
 740                                 // Add to mesh collector
 741                                 collector.append(tile, vertices, 4, indices, 6);
 742                         }
 743                 break;}
 744                 case NDT_GLASSLIKE_FRAMED:
 745                 {
 746                         static const v3s16 dirs[6] = {
 747                                 v3s16( 0, 1, 0),
 748                                 v3s16( 0,-1, 0),
 749                                 v3s16( 1, 0, 0),
 750                                 v3s16(-1, 0, 0),
 751                                 v3s16( 0, 0, 1),
 752                                 v3s16( 0, 0,-1)
 753                         };
 754                         TileSpec tiles[2];
 755                         tiles[0] = getNodeTile(n, p, dirs[0], data);
 756                         tiles[1] = getNodeTile(n, p, dirs[1], data);
 757                         u16 l = getInteriorLight(n, 1, data);
 758                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 759                         v3f pos = intToFloat(p, BS);
 760                         static const float a=BS/2;
 761                         static const float b=.876*(BS/2);
 762                         static const aabb3f frame_edges[12] = {
 763                                 aabb3f( b, b,-a, a, a, a), // y+
 764                                 aabb3f(-a, b,-a,-b, a, a), // y+
 765                                 aabb3f( b,-a,-a, a,-b, a), // y-
 766                                 aabb3f(-a,-a,-a,-b,-b, a), // y-
 767                                 aabb3f( b,-a, b, a, a, a), // x+
 768                                 aabb3f( b,-a,-a, a, a,-b), // x+
 769                                 aabb3f(-a,-a, b,-b, a, a), // x-
 770                                 aabb3f(-a,-a,-a,-b, a,-b), // x-
 771                                 aabb3f(-a, b, b, a, a, a), // z+
 772                                 aabb3f(-a,-a, b, a,-b, a), // z+
 773                                 aabb3f(-a,-a,-a, a,-b,-b), // z-
 774                                 aabb3f(-a, b,-a, a, a,-b)  // z-
 775                         };
 776                         aabb3f glass_faces[6] = {
 777                                 aabb3f(-a, a,-a, a, a, a), // y+
 778                                 aabb3f(-a,-a,-a, a,-a, a), // y-
 779                                 aabb3f( a,-a,-a, a, a, a), // x+
 780                                 aabb3f(-a,-a,-a,-a, a, a), // x-
 781                                 aabb3f(-a,-a, a, a, a, a), // z+
 782                                 aabb3f(-a,-a,-a, a, a,-a)  // z-
 783                         };
 784
 785                         int visible_faces[6] = {0,0,0,0,0,0};
 786                         int nb[18] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
 787                         u8 i;
 788                         content_t current = n.getContent();
 789                         content_t content;
 790                         MapNode n2;
 791                         v3s16 n2p;
 792                         for(i=0; i<18; i++)
 793                         {
 794                                 n2p = blockpos_nodes + p + g_26dirs[i];
 795                                 n2 = data->m_vmanip.getNodeNoEx(n2p);
 796                                 content_t n2c = n2.getContent();
 797                                 //TODO: remove CONTENT_IGNORE check when getNodeNoEx is fixed
 798                                 if (n2c == current || n2c == CONTENT_IGNORE)
 799                                         nb[i]=1;
 800                         }
 801                         for(i=0; i<6; i++)
 802                         {
 803                                 n2p = blockpos_nodes + p + dirs[i];
 804                                 n2 = data->m_vmanip.getNodeNoEx(n2p);
 805                                 content = n2.getContent();
 806                                 const ContentFeatures &f2 = nodedef->get(content);
 807                                 if (content == CONTENT_AIR || f2.isLiquid())
 808                                         visible_faces[i]=1;
 809                         }
 810                         static const u8 nb_triplet[12*3] = {
 811                                 1,2, 7,  1,5, 6,  4,2,15,  4,5,14,
 812                                 2,0,11,  2,3,13,  5,0,10,  5,3,12,
 813                                 0,1, 8,  0,4,16,  3,4,17,  3,1, 9
 814                         };
 815
 816                         f32 tx1,ty1,tz1,tx2,ty2,tz2;
 817                         aabb3f box;
 818                         for(i=0; i<12; i++)
 819                         {
 820                                 int edge_invisible;
 821                                 if (nb[nb_triplet[i*3+2]]==1)
 822                                         edge_invisible=nb[nb_triplet[i*3]] & nb[nb_triplet[i*3+1]];
 823                                 else
 824                                         edge_invisible=nb[nb_triplet[i*3]] ^ nb[nb_triplet[i*3+1]];
 825                                 if (edge_invisible)
 826                                         continue;
 827                                 box=frame_edges[i];
 828                                 box.MinEdge += pos;
 829                                 box.MaxEdge += pos;
 830                                 tx1 = (box.MinEdge.X/BS)+0.5;
 831                                 ty1 = (box.MinEdge.Y/BS)+0.5;
 832                                 tz1 = (box.MinEdge.Z/BS)+0.5;
 833                                 tx2 = (box.MaxEdge.X/BS)+0.5;
 834                                 ty2 = (box.MaxEdge.Y/BS)+0.5;
 835                                 tz2 = (box.MaxEdge.Z/BS)+0.5;
 836                                 f32 txc1[24] = {
 837                                         tx1,   1-tz2,   tx2, 1-tz1,
 838                                         tx1,     tz1,   tx2,   tz2,
 839                                         tz1,   1-ty2,   tz2, 1-ty1,
 840                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
 841                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
 842                                         tx1,   1-ty2,   tx2, 1-ty1,
 843                                 };
 844                                 makeCuboid(&collector, box, &tiles[0], 1, c, txc1);
 845                         }
 846                         for(i=0; i<6; i++)
 847                         {
 848                                 if (visible_faces[i]==0)
 849                                         continue;
 850                                 box=glass_faces[i];
 851                                 box.MinEdge += pos;
 852                                 box.MaxEdge += pos;
 853                                 tx1 = (box.MinEdge.X/BS)+0.5;
 854                                 ty1 = (box.MinEdge.Y/BS)+0.5;
 855                                 tz1 = (box.MinEdge.Z/BS)+0.5;
 856                                 tx2 = (box.MaxEdge.X/BS)+0.5;
 857                                 ty2 = (box.MaxEdge.Y/BS)+0.5;
 858                                 tz2 = (box.MaxEdge.Z/BS)+0.5;
 859                                 f32 txc2[24] = {
 860                                         tx1,   1-tz2,   tx2, 1-tz1,
 861                                         tx1,     tz1,   tx2,   tz2,
 862                                         tz1,   1-ty2,   tz2, 1-ty1,
 863                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
 864                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
 865                                         tx1,   1-ty2,   tx2, 1-ty1,
 866                                 };
 867                                 makeCuboid(&collector, box, &tiles[1], 1, c, txc2);
 868                         }
 869                 break;}
 870                 case NDT_ALLFACES:
 871                 {
 872                         TileSpec tile_leaves = getNodeTile(n, p,
 873                                         v3s16(0,0,0), data);
 874
 875                         u16 l = getInteriorLight(n, 1, data);
 876                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 877
 878                         v3f pos = intToFloat(p, BS);
 879                         aabb3f box(-BS/2,-BS/2,-BS/2,BS/2,BS/2,BS/2);
 880                         box.MinEdge += pos;
 881                         box.MaxEdge += pos;
 882                         makeCuboid(&collector, box, &tile_leaves, 1, c, NULL);
 883                 break;}
 884                 case NDT_ALLFACES_OPTIONAL:
 885                         // This is always pre-converted to something else
 886                         assert(0);
 887                         break;
 888                 case NDT_TORCHLIKE:
 889                 {
 890                         v3s16 dir = n.getWallMountedDir(nodedef);
 891
 892                         u8 tileindex = 0;
 893                         if(dir == v3s16(0,-1,0)){
 894                                 tileindex = 0; // floor
 895                         } else if(dir == v3s16(0,1,0)){
 896                                 tileindex = 1; // ceiling
 897                         // For backwards compatibility
 898                         } else if(dir == v3s16(0,0,0)){
 899                                 tileindex = 0; // floor
 900                         } else {
 901                                 tileindex = 2; // side
 902                         }
 903
 904                         TileSpec tile = getNodeTileN(n, p, tileindex, data);
 905                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
 906                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
 907
 908                         u16 l = getInteriorLight(n, 1, data);
 909                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 910
 911                         // Wall at X+ of node
 912                         video::S3DVertex vertices[4] =
 913                         {
 914                                 video::S3DVertex(-BS/2,-BS/2,0, 0,0,0, c, 0,1),
 915                                 video::S3DVertex(BS/2,-BS/2,0, 0,0,0, c, 1,1),
 916                                 video::S3DVertex(BS/2,BS/2,0, 0,0,0, c, 1,0),
 917                                 video::S3DVertex(-BS/2,BS/2,0, 0,0,0, c, 0,0),
 918                         };
 919
 920                         for(s32 i=0; i<4; i++)
 921                         {
 922                                 if(dir == v3s16(1,0,0))
 923                                         vertices[i].Pos.rotateXZBy(0);
 924                                 if(dir == v3s16(-1,0,0))
 925                                         vertices[i].Pos.rotateXZBy(180);
 926                                 if(dir == v3s16(0,0,1))
 927                                         vertices[i].Pos.rotateXZBy(90);
 928                                 if(dir == v3s16(0,0,-1))
 929                                         vertices[i].Pos.rotateXZBy(-90);
 930                                 if(dir == v3s16(0,-1,0))
 931                                         vertices[i].Pos.rotateXZBy(45);
 932                                 if(dir == v3s16(0,1,0))
 933                                         vertices[i].Pos.rotateXZBy(-45);
 934
 935                                 vertices[i].Pos += intToFloat(p, BS);
 936                         }
 937
 938                         u16 indices[] = {0,1,2,2,3,0};
 939                         // Add to mesh collector
 940                         collector.append(tile, vertices, 4, indices, 6);
 941                 break;}
 942                 case NDT_SIGNLIKE:
 943                 {
 944                         TileSpec tile = getNodeTileN(n, p, 0, data);
 945                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
 946                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
 947
 948                         u16 l = getInteriorLight(n, 0, data);
 949                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 950
 951                         float d = (float)BS/16;
 952                         // Wall at X+ of node
 953                         video::S3DVertex vertices[4] =
 954                         {
 955                                 video::S3DVertex(BS/2-d,BS/2,BS/2, 0,0,0, c, 0,0),
 956                                 video::S3DVertex(BS/2-d,BS/2,-BS/2, 0,0,0, c, 1,0),
 957                                 video::S3DVertex(BS/2-d,-BS/2,-BS/2, 0,0,0, c, 1,1),
 958                                 video::S3DVertex(BS/2-d,-BS/2,BS/2, 0,0,0, c, 0,1),
 959                         };
 960
 961                         v3s16 dir = n.getWallMountedDir(nodedef);
 962
 963                         for(s32 i=0; i<4; i++)
 964                         {
 965                                 if(dir == v3s16(1,0,0))
 966                                         vertices[i].Pos.rotateXZBy(0);
 967                                 if(dir == v3s16(-1,0,0))
 968                                         vertices[i].Pos.rotateXZBy(180);
 969                                 if(dir == v3s16(0,0,1))
 970                                         vertices[i].Pos.rotateXZBy(90);
 971                                 if(dir == v3s16(0,0,-1))
 972                                         vertices[i].Pos.rotateXZBy(-90);
 973                                 if(dir == v3s16(0,-1,0))
 974                                         vertices[i].Pos.rotateXYBy(-90);
 975                                 if(dir == v3s16(0,1,0))
 976                                         vertices[i].Pos.rotateXYBy(90);
 977
 978                                 vertices[i].Pos += intToFloat(p, BS);
 979                         }
 980
 981                         u16 indices[] = {0,1,2,2,3,0};
 982                         // Add to mesh collector
 983                         collector.append(tile, vertices, 4, indices, 6);
 984                 break;}
 985                 case NDT_PLANTLIKE:
 986                 {
 987                         TileSpec tile = getNodeTileN(n, p, 0, data);
 988                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
 989
 990                         u16 l = getInteriorLight(n, 1, data);
 991                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 992
 993                         for(u32 j=0; j<2; j++)
 994                         {
 995                                 video::S3DVertex vertices[4] =
 996                                 {
 997                                         video::S3DVertex(-BS/2*f.visual_scale,-BS/2,0, 0,0,0, c, 0,1),
 998                                         video::S3DVertex( BS/2*f.visual_scale,-BS/2,0, 0,0,0, c, 1,1),
 999                                         video::S3DVertex( BS/2*f.visual_scale,
1000                                                 -BS/2 + f.visual_scale*BS,0, 0,0,0, c, 1,0),
1001                                         video::S3DVertex(-BS/2*f.visual_scale,
1002                                                 -BS/2 + f.visual_scale*BS,0, 0,0,0, c, 0,0),
1003                                 };
1004
1005                                 if(j == 0)
1006                                 {
1007                                         for(u16 i=0; i<4; i++)
1008                                                 vertices[i].Pos.rotateXZBy(45);
1009                                 }
1010                                 else if(j == 1)
1011                                 {
1012                                         for(u16 i=0; i<4; i++)
1013                                                 vertices[i].Pos.rotateXZBy(-45);
1014                                 }
1015
1016                                 for(u16 i=0; i<4; i++)
1017                                 {
1018                                         vertices[i].Pos *= f.visual_scale;
1019                                         vertices[i].Pos += intToFloat(p, BS);
1020                                 }
1021
1022                                 u16 indices[] = {0,1,2,2,3,0};
1023                                 // Add to mesh collector
1024                                 collector.append(tile, vertices, 4, indices, 6);
1025                         }
1026                 break;}
1027                 case NDT_FENCELIKE:
1028                 {
1029                         TileSpec tile = getNodeTile(n, p, v3s16(0,0,0), data);
1030                         TileSpec tile_nocrack = tile;
1031                         tile_nocrack.material_flags &= ~MATERIAL_FLAG_CRACK;
1032
1033                         // A hack to put wood the right way around in the posts
1034                         ITextureSource *tsrc = data->m_gamedef->tsrc();
1035                         std::string texturestring_rot = tsrc->getTextureName(
1036                                         tile.texture_id) + "^[transformR90";
1037                         TileSpec tile_rot = tile;
1038                         tile_rot.texture = tsrc->getTexture(
1039                                         texturestring_rot,
1040                                         &tile_rot.texture_id);
1041
1042                         u16 l = getInteriorLight(n, 1, data);
1043                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
1044
1045                         const f32 post_rad=(f32)BS/8;
1046                         const f32 bar_rad=(f32)BS/16;
1047                         const f32 bar_len=(f32)(BS/2)-post_rad;
1048
1049                         v3f pos = intToFloat(p, BS);
1050
1051                         // The post - always present
1052                         aabb3f post(-post_rad,-BS/2,-post_rad,post_rad,BS/2,post_rad);
1053                         post.MinEdge += pos;
1054                         post.MaxEdge += pos;
1055                         f32 postuv[24]={
1056                                         6/16.,6/16.,10/16.,10/16.,
1057                                         6/16.,6/16.,10/16.,10/16.,
1058                                         0/16.,0,4/16.,1,
1059                                         4/16.,0,8/16.,1,
1060                                         8/16.,0,12/16.,1,
1061                                         12/16.,0,16/16.,1};
1062                         makeCuboid(&collector, post, &tile_rot, 1, c, postuv);
1063
1064                         // Now a section of fence, +X, if there's a post there
1065                         v3s16 p2 = p;
1066                         p2.X++;
1067                         MapNode n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
1068                         const ContentFeatures *f2 = &nodedef->get(n2);
1069                         if(f2->drawtype == NDT_FENCELIKE)
1070                         {
1071                                 aabb3f bar(-bar_len+BS/2,-bar_rad+BS/4,-bar_rad,
1072                                                 bar_len+BS/2,bar_rad+BS/4,bar_rad);
1073                                 bar.MinEdge += pos;
1074                                 bar.MaxEdge += pos;
1075                                 f32 xrailuv[24]={
1076                                         0/16.,2/16.,16/16.,4/16.,
1077                                         0/16.,4/16.,16/16.,6/16.,
1078                                         6/16.,6/16.,8/16.,8/16.,
1079                                         10/16.,10/16.,12/16.,12/16.,
1080                                         0/16.,8/16.,16/16.,10/16.,
1081                                         0/16.,14/16.,16/16.,16/16.};
1082                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1083                                                 c, xrailuv);
1084                                 bar.MinEdge.Y -= BS/2;
1085                                 bar.MaxEdge.Y -= BS/2;
1086                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1087                                                 c, xrailuv);
1088                         }
1089
1090                         // Now a section of fence, +Z, if there's a post there
1091                         p2 = p;
1092                         p2.Z++;
1093                         n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
1094                         f2 = &nodedef->get(n2);
1095                         if(f2->drawtype == NDT_FENCELIKE)
1096                         {
1097                                 aabb3f bar(-bar_rad,-bar_rad+BS/4,-bar_len+BS/2,
1098                                                 bar_rad,bar_rad+BS/4,bar_len+BS/2);
1099                                 bar.MinEdge += pos;
1100                                 bar.MaxEdge += pos;
1101                                 f32 zrailuv[24]={
1102                                         3/16.,1/16.,5/16.,5/16., // cannot rotate; stretch
1103                                         4/16.,1/16.,6/16.,5/16., // for wood texture instead
1104                                         0/16.,9/16.,16/16.,11/16.,
1105                                         0/16.,6/16.,16/16.,8/16.,
1106                                         6/16.,6/16.,8/16.,8/16.,
1107                                         10/16.,10/16.,12/16.,12/16.};
1108                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1109                                                 c, zrailuv);
1110                                 bar.MinEdge.Y -= BS/2;
1111                                 bar.MaxEdge.Y -= BS/2;
1112                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1113                                                 c, zrailuv);
1114                         }
1115                 break;}
1116                 case NDT_RAILLIKE:
1117                 {
1118                         bool is_rail_x [] = { false, false };  /* x-1, x+1 */
1119                         bool is_rail_z [] = { false, false };  /* z-1, z+1 */
1120
1121                         bool is_rail_z_minus_y [] = { false, false };  /* z-1, z+1; y-1 */
1122                         bool is_rail_x_minus_y [] = { false, false };  /* x-1, z+1; y-1 */
1123                         bool is_rail_z_plus_y [] = { false, false };  /* z-1, z+1; y+1 */
1124                         bool is_rail_x_plus_y [] = { false, false };  /* x-1, x+1; y+1 */
1125
1126                         MapNode n_minus_x = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1,y,z));
1127                         MapNode n_plus_x = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1,y,z));
1128                         MapNode n_minus_z = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y,z-1));
1129                         MapNode n_plus_z = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y,z+1));
1130                         MapNode n_plus_x_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1, y+1, z));
1131                         MapNode n_plus_x_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1, y-1, z));
1132                         MapNode n_minus_x_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1, y+1, z));
1133                         MapNode n_minus_x_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1, y-1, z));
1134                         MapNode n_plus_z_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y+1, z+1));
1135                         MapNode n_minus_z_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y+1, z-1));
1136                         MapNode n_plus_z_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y-1, z+1));
1137                         MapNode n_minus_z_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y-1, z-1));
1138
1139                         content_t thiscontent = n.getContent();
1140                         std::string groupname = "connect_to_raillike"; // name of the group that enables connecting to raillike nodes of different kind
1141                         bool self_connect_to_raillike = ((ItemGroupList) nodedef->get(n).groups)[groupname] != 0;
1142
1143                         if ((nodedef->get(n_minus_x).drawtype == NDT_RAILLIKE
1144                                         && ((ItemGroupList) nodedef->get(n_minus_x).groups)[groupname] != 0
1145                                         && self_connect_to_raillike)
1146                                         || n_minus_x.getContent() == thiscontent)
1147                                 is_rail_x[0] = true;
1148
1149                         if ((nodedef->get(n_minus_x_minus_y).drawtype == NDT_RAILLIKE
1150                                         && ((ItemGroupList) nodedef->get(n_minus_x_minus_y).groups)[groupname] != 0
1151                                         && self_connect_to_raillike)
1152                                         || n_minus_x_minus_y.getContent() == thiscontent)
1153                                 is_rail_x_minus_y[0] = true;
1154
1155                         if ((nodedef->get(n_minus_x_plus_y).drawtype == NDT_RAILLIKE
1156                                         && ((ItemGroupList) nodedef->get(n_minus_x_plus_y).groups)[groupname] != 0
1157                                         && self_connect_to_raillike)
1158                                         || n_minus_x_plus_y.getContent() == thiscontent)
1159                                 is_rail_x_plus_y[0] = true;
1160
1161                         if ((nodedef->get(n_plus_x).drawtype == NDT_RAILLIKE
1162                                         && ((ItemGroupList) nodedef->get(n_plus_x).groups)[groupname] != 0
1163                                         && self_connect_to_raillike)
1164                                         || n_plus_x.getContent() == thiscontent)
1165                                 is_rail_x[1] = true;
1166
1167                         if ((nodedef->get(n_plus_x_minus_y).drawtype == NDT_RAILLIKE
1168                                         && ((ItemGroupList) nodedef->get(n_plus_x_minus_y).groups)[groupname] != 0
1169                                         && self_connect_to_raillike)
1170                                         || n_plus_x_minus_y.getContent() == thiscontent)
1171                                 is_rail_x_minus_y[1] = true;
1172
1173                         if ((nodedef->get(n_plus_x_plus_y).drawtype == NDT_RAILLIKE
1174                                         && ((ItemGroupList) nodedef->get(n_plus_x_plus_y).groups)[groupname] != 0
1175                                         && self_connect_to_raillike)
1176                                         || n_plus_x_plus_y.getContent() == thiscontent)
1177                                 is_rail_x_plus_y[1] = true;
1178
1179                         if ((nodedef->get(n_minus_z).drawtype == NDT_RAILLIKE
1180                                         && ((ItemGroupList) nodedef->get(n_minus_z).groups)[groupname] != 0
1181                                         && self_connect_to_raillike)
1182                                         || n_minus_z.getContent() == thiscontent)
1183                                 is_rail_z[0] = true;
1184
1185                         if ((nodedef->get(n_minus_z_minus_y).drawtype == NDT_RAILLIKE
1186                                         && ((ItemGroupList) nodedef->get(n_minus_z_minus_y).groups)[groupname] != 0
1187                                         && self_connect_to_raillike)
1188                                         || n_minus_z_minus_y.getContent() == thiscontent)
1189                                 is_rail_z_minus_y[0] = true;
1190
1191                         if ((nodedef->get(n_minus_z_plus_y).drawtype == NDT_RAILLIKE
1192                                         && ((ItemGroupList) nodedef->get(n_minus_z_plus_y).groups)[groupname] != 0
1193                                         && self_connect_to_raillike)
1194                                         || n_minus_z_plus_y.getContent() == thiscontent)
1195                                 is_rail_z_plus_y[0] = true;
1196
1197                         if ((nodedef->get(n_plus_z).drawtype == NDT_RAILLIKE
1198                                         && ((ItemGroupList) nodedef->get(n_plus_z).groups)[groupname] != 0
1199                                         && self_connect_to_raillike)
1200                                         || n_plus_z.getContent() == thiscontent)
1201                                 is_rail_z[1] = true;
1202
1203                         if ((nodedef->get(n_plus_z_minus_y).drawtype == NDT_RAILLIKE
1204                                         && ((ItemGroupList) nodedef->get(n_plus_z_minus_y).groups)[groupname] != 0
1205                                         && self_connect_to_raillike)
1206                                         || n_plus_z_minus_y.getContent() == thiscontent)
1207                                 is_rail_z_minus_y[1] = true;
1208
1209                         if ((nodedef->get(n_plus_z_plus_y).drawtype == NDT_RAILLIKE
1210                                         && ((ItemGroupList) nodedef->get(n_plus_z_plus_y).groups)[groupname] != 0
1211                                         && self_connect_to_raillike)
1212                                         || n_plus_z_plus_y.getContent() == thiscontent)
1213                                 is_rail_z_plus_y[1] = true;
1214
1215                         bool is_rail_x_all[] = {false, false};
1216                         bool is_rail_z_all[] = {false, false};
1217                         is_rail_x_all[0]=is_rail_x[0] || is_rail_x_minus_y[0] || is_rail_x_plus_y[0];
1218                         is_rail_x_all[1]=is_rail_x[1] || is_rail_x_minus_y[1] || is_rail_x_plus_y[1];
1219                         is_rail_z_all[0]=is_rail_z[0] || is_rail_z_minus_y[0] || is_rail_z_plus_y[0];
1220                         is_rail_z_all[1]=is_rail_z[1] || is_rail_z_minus_y[1] || is_rail_z_plus_y[1];
1221
1222                         // reasonable default, flat straight unrotated rail
1223                         bool is_straight = true;
1224                         int adjacencies = 0;
1225                         int angle = 0;
1226                         u8 tileindex = 0;
1227
1228                         // check for sloped rail
1229                         if (is_rail_x_plus_y[0] || is_rail_x_plus_y[1] || is_rail_z_plus_y[0] || is_rail_z_plus_y[1])
1230                         {
1231                                 adjacencies = 5; //5 means sloped
1232                                 is_straight = true; // sloped is always straight
1233                         }
1234                         else
1235                         {
1236                                 // is really straight, rails on both sides
1237                                 is_straight = (is_rail_x_all[0] && is_rail_x_all[1]) || (is_rail_z_all[0] && is_rail_z_all[1]);
1238                                 adjacencies = is_rail_x_all[0] + is_rail_x_all[1] + is_rail_z_all[0] + is_rail_z_all[1];
1239                         }
1240
1241                         switch (adjacencies) {
1242                         case 1:
1243                                 if(is_rail_x_all[0] || is_rail_x_all[1])
1244                                         angle = 90;
1245                                 break;
1246                         case 2:
1247                                 if(!is_straight)
1248                                         tileindex = 1; // curved
1249                                 if(is_rail_x_all[0] && is_rail_x_all[1])
1250                                         angle = 90;
1251                                 if(is_rail_z_all[0] && is_rail_z_all[1]){
1252                                         if (is_rail_z_plus_y[0])
1253                                                 angle = 180;
1254                                 }
1255                                 else if(is_rail_x_all[0] && is_rail_z_all[0])
1256                                         angle = 270;
1257                                 else if(is_rail_x_all[0] && is_rail_z_all[1])
1258                                         angle = 180;
1259                                 else if(is_rail_x_all[1] && is_rail_z_all[1])
1260                                         angle = 90;
1261                                 break;
1262                         case 3:
1263                                 // here is where the potential to 'switch' a junction is, but not implemented at present
1264                                 tileindex = 2; // t-junction
1265                                 if(!is_rail_x_all[1])
1266                                         angle=180;
1267                                 if(!is_rail_z_all[0])
1268                                         angle=90;
1269                                 if(!is_rail_z_all[1])
1270                                         angle=270;
1271                                 break;
1272                         case 4:
1273                                 tileindex = 3; // crossing
1274                                 break;
1275                         case 5: //sloped
1276                                 if(is_rail_z_plus_y[0])
1277                                         angle = 180;
1278                                 if(is_rail_x_plus_y[0])
1279                                         angle = 90;
1280                                 if(is_rail_x_plus_y[1])
1281                                         angle = -90;
1282                                 break;
1283                         default:
1284                                 break;
1285                         }
1286
1287                         TileSpec tile = getNodeTileN(n, p, tileindex, data);
1288                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
1289                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
1290
1291                         u16 l = getInteriorLight(n, 0, data);
1292                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
1293
1294                         float d = (float)BS/64;
1295
1296                         char g=-1;
1297                         if (is_rail_x_plus_y[0] || is_rail_x_plus_y[1] || is_rail_z_plus_y[0] || is_rail_z_plus_y[1])
1298                                 g=1; //Object is at a slope
1299
1300                         video::S3DVertex vertices[4] =
1301                         {
1302                                         video::S3DVertex(-BS/2,-BS/2+d,-BS/2, 0,0,0, c, 0,1),
1303                                         video::S3DVertex(BS/2,-BS/2+d,-BS/2, 0,0,0, c, 1,1),
1304                                         video::S3DVertex(BS/2,g*BS/2+d,BS/2, 0,0,0, c, 1,0),
1305                                         video::S3DVertex(-BS/2,g*BS/2+d,BS/2, 0,0,0, c, 0,0),
1306                         };
1307
1308                         for(s32 i=0; i<4; i++)
1309                         {
1310                                 if(angle != 0)
1311                                         vertices[i].Pos.rotateXZBy(angle);
1312                                 vertices[i].Pos += intToFloat(p, BS);
1313                         }
1314
1315                         u16 indices[] = {0,1,2,2,3,0};
1316                         collector.append(tile, vertices, 4, indices, 6);
1317                 break;}
1318                 case NDT_NODEBOX:
1319                 {
1320                         static const v3s16 tile_dirs[6] = {
1321                                 v3s16(0, 1, 0),
1322                                 v3s16(0, -1, 0),
1323                                 v3s16(1, 0, 0),
1324                                 v3s16(-1, 0, 0),
1325                                 v3s16(0, 0, 1),
1326                                 v3s16(0, 0, -1)
1327                         };
1328                         TileSpec tiles[6];
1329
1330                         u16 l = getInteriorLight(n, 0, data);
1331                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
1332
1333                         v3f pos = intToFloat(p, BS);
1334
1335                         std::vector<aabb3f> boxes = n.getNodeBoxes(nodedef);
1336                         for(std::vector<aabb3f>::iterator
1337                                         i = boxes.begin();
1338                                         i != boxes.end(); i++)
1339                         {
1340                         for(int j = 0; j < 6; j++)
1341                                 {
1342                                 // Handles facedir rotation for textures
1343                                 tiles[j] = getNodeTile(n, p, tile_dirs[j], data);
1344                                 }
1345                                 aabb3f box = *i;
1346                                 box.MinEdge += pos;
1347                                 box.MaxEdge += pos;
1348
1349                                 f32 temp;
1350                                 if (box.MinEdge.X > box.MaxEdge.X)
1351                                 {
1352                                         temp=box.MinEdge.X;
1353                                         box.MinEdge.X=box.MaxEdge.X;
1354                                         box.MaxEdge.X=temp;
1355                                 }
1356                                 if (box.MinEdge.Y > box.MaxEdge.Y)
1357                                 {
1358                                         temp=box.MinEdge.Y;
1359                                         box.MinEdge.Y=box.MaxEdge.Y;
1360                                         box.MaxEdge.Y=temp;
1361                                 }
1362                                 if (box.MinEdge.Z > box.MaxEdge.Z)
1363                                 {
1364                                         temp=box.MinEdge.Z;
1365                                         box.MinEdge.Z=box.MaxEdge.Z;
1366                                         box.MaxEdge.Z=temp;
1367                                 }
1368
1369                                 //
1370                                 // Compute texture coords
1371                                 f32 tx1 = (box.MinEdge.X/BS)+0.5;
1372                                 f32 ty1 = (box.MinEdge.Y/BS)+0.5;
1373                                 f32 tz1 = (box.MinEdge.Z/BS)+0.5;
1374                                 f32 tx2 = (box.MaxEdge.X/BS)+0.5;
1375                                 f32 ty2 = (box.MaxEdge.Y/BS)+0.5;
1376                                 f32 tz2 = (box.MaxEdge.Z/BS)+0.5;
1377                                 f32 txc[24] = {
1378                                         // up
1379                                         tx1, 1-tz2, tx2, 1-tz1,
1380                                         // down
1381                                         tx1, tz1, tx2, tz2,
1382                                         // right
1383                                         tz1, 1-ty2, tz2, 1-ty1,
1384                                         // left
1385                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
1386                                         // back
1387                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
1388                                         // front
1389                                         tx1, 1-ty2, tx2, 1-ty1,
1390                                 };
1391                                 makeCuboid(&collector, box, tiles, 6, c, txc);
1392                         }
1393                 break;}
1394                 }
1395         }
1396 }
1397