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         const 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         if(txc == NULL)
  54         {
  55                 static const f32 txc_default[24] = {
  56                         0,0,1,1,
  57                         0,0,1,1,
  58                         0,0,1,1,
  59                         0,0,1,1,
  60                         0,0,1,1,
  61                         0,0,1,1
  62                 };
  63                 txc = txc_default;
  64         }
  65
  66         video::S3DVertex vertices[24] =
  67         {
  68                 // up
  69                 video::S3DVertex(min.X,max.Y,max.Z, 0,1,0, c, txc[0],txc[1]),
  70                 video::S3DVertex(max.X,max.Y,max.Z, 0,1,0, c, txc[2],txc[1]),
  71                 video::S3DVertex(max.X,max.Y,min.Z, 0,1,0, c, txc[2],txc[3]),
  72                 video::S3DVertex(min.X,max.Y,min.Z, 0,1,0, c, txc[0],txc[3]),
  73                 // down
  74                 video::S3DVertex(min.X,min.Y,min.Z, 0,-1,0, c, txc[4],txc[5]),
  75                 video::S3DVertex(max.X,min.Y,min.Z, 0,-1,0, c, txc[6],txc[5]),
  76                 video::S3DVertex(max.X,min.Y,max.Z, 0,-1,0, c, txc[6],txc[7]),
  77                 video::S3DVertex(min.X,min.Y,max.Z, 0,-1,0, c, txc[4],txc[7]),
  78                 // right
  79                 video::S3DVertex(max.X,max.Y,min.Z, 1,0,0, c, txc[ 8],txc[9]),
  80                 video::S3DVertex(max.X,max.Y,max.Z, 1,0,0, c, txc[10],txc[9]),
  81                 video::S3DVertex(max.X,min.Y,max.Z, 1,0,0, c, txc[10],txc[11]),
  82                 video::S3DVertex(max.X,min.Y,min.Z, 1,0,0, c, txc[ 8],txc[11]),
  83                 // left
  84                 video::S3DVertex(min.X,max.Y,max.Z, -1,0,0, c, txc[12],txc[13]),
  85                 video::S3DVertex(min.X,max.Y,min.Z, -1,0,0, c, txc[14],txc[13]),
  86                 video::S3DVertex(min.X,min.Y,min.Z, -1,0,0, c, txc[14],txc[15]),
  87                 video::S3DVertex(min.X,min.Y,max.Z, -1,0,0, c, txc[12],txc[15]),
  88                 // back
  89                 video::S3DVertex(max.X,max.Y,max.Z, 0,0,1, c, txc[16],txc[17]),
  90                 video::S3DVertex(min.X,max.Y,max.Z, 0,0,1, c, txc[18],txc[17]),
  91                 video::S3DVertex(min.X,min.Y,max.Z, 0,0,1, c, txc[18],txc[19]),
  92                 video::S3DVertex(max.X,min.Y,max.Z, 0,0,1, c, txc[16],txc[19]),
  93                 // front
  94                 video::S3DVertex(min.X,max.Y,min.Z, 0,0,-1, c, txc[20],txc[21]),
  95                 video::S3DVertex(max.X,max.Y,min.Z, 0,0,-1, c, txc[22],txc[21]),
  96                 video::S3DVertex(max.X,min.Y,min.Z, 0,0,-1, c, txc[22],txc[23]),
  97                 video::S3DVertex(min.X,min.Y,min.Z, 0,0,-1, c, txc[20],txc[23]),
  98         };
  99
 100         for(s32 j=0; j<24; j++)
 101         {
 102                 int tileindex = MYMIN(j/4, tilecount-1);
 103                 vertices[j].TCoords *= tiles[tileindex].texture.size;
 104                 vertices[j].TCoords += tiles[tileindex].texture.pos;
 105         }
 106
 107         u16 indices[] = {0,1,2,2,3,0};
 108
 109         // Add to mesh collector
 110         for(s32 j=0; j<24; j+=4)
 111         {
 112                 int tileindex = MYMIN(j/4, tilecount-1);
 113                 collector->append(tiles[tileindex],
 114                                 vertices+j, 4, indices, 6);
 115         }
 116 }
 117
 118 void mapblock_mesh_generate_special(MeshMakeData *data,
 119                 MeshCollector &collector)
 120 {
 121         INodeDefManager *nodedef = data->m_gamedef->ndef();
 122
 123         // 0ms
 124         //TimeTaker timer("mapblock_mesh_generate_special()");
 125
 126         /*
 127                 Some settings
 128         */
 129         bool new_style_water = g_settings->getBool("new_style_water");
 130
 131         float node_liquid_level = 1.0;
 132         if(new_style_water)
 133                 node_liquid_level = 0.85;
 134
 135         v3s16 blockpos_nodes = data->m_blockpos*MAP_BLOCKSIZE;
 136
 137         for(s16 z=0; z<MAP_BLOCKSIZE; z++)
 138         for(s16 y=0; y<MAP_BLOCKSIZE; y++)
 139         for(s16 x=0; x<MAP_BLOCKSIZE; x++)
 140         {
 141                 v3s16 p(x,y,z);
 142
 143                 MapNode n = data->m_vmanip.getNodeNoEx(blockpos_nodes+p);
 144                 const ContentFeatures &f = nodedef->get(n);
 145
 146                 // Only solidness=0 stuff is drawn here
 147                 if(f.solidness != 0)
 148                         continue;
 149
 150                 switch(f.drawtype){
 151                 default:
 152                         infostream<<"Got "<<f.drawtype<<std::endl;
 153                         assert(0);
 154                         break;
 155                 case NDT_AIRLIKE:
 156                         break;
 157                 case NDT_LIQUID:
 158                 {
 159                         /*
 160                                 Add water sources to mesh if using new style
 161                         */
 162                         TileSpec tile_liquid = f.special_tiles[0];
 163                         TileSpec tile_liquid_bfculled = getNodeTile(n, p, v3s16(0,0,0), data);
 164                         AtlasPointer &pa_liquid = tile_liquid.texture;
 165
 166                         bool top_is_same_liquid = false;
 167                         MapNode ntop = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y+1,z));
 168                         content_t c_flowing = nodedef->getId(f.liquid_alternative_flowing);
 169                         content_t c_source = nodedef->getId(f.liquid_alternative_source);
 170                         if(ntop.getContent() == c_flowing || ntop.getContent() == c_source)
 171                                 top_is_same_liquid = true;
 172
 173                         u16 l = getInteriorLight(n, 0, data);
 174                         video::SColor c = MapBlock_LightColor(f.alpha, l, decode_light(f.light_source));
 175
 176                         /*
 177                                 Generate sides
 178                          */
 179                         v3s16 side_dirs[4] = {
 180                                 v3s16(1,0,0),
 181                                 v3s16(-1,0,0),
 182                                 v3s16(0,0,1),
 183                                 v3s16(0,0,-1),
 184                         };
 185                         for(u32 i=0; i<4; i++)
 186                         {
 187                                 v3s16 dir = side_dirs[i];
 188
 189                                 MapNode neighbor = data->m_vmanip.getNodeNoEx(blockpos_nodes + p + dir);
 190                                 content_t neighbor_content = neighbor.getContent();
 191                                 const ContentFeatures &n_feat = nodedef->get(neighbor_content);
 192                                 MapNode n_top = data->m_vmanip.getNodeNoEx(blockpos_nodes + p + dir+ v3s16(0,1,0));
 193                                 content_t n_top_c = n_top.getContent();
 194
 195                                 if(neighbor_content == CONTENT_IGNORE)
 196                                         continue;
 197
 198                                 /*
 199                                         If our topside is liquid and neighbor's topside
 200                                         is liquid, don't draw side face
 201                                 */
 202                                 if(top_is_same_liquid && (n_top_c == c_flowing ||
 203                                                 n_top_c == c_source || n_top_c == CONTENT_IGNORE))
 204                                         continue;
 205
 206                                 // Don't draw face if neighbor is blocking the view
 207                                 if(n_feat.solidness == 2)
 208                                         continue;
 209
 210                                 bool neighbor_is_same_liquid = (neighbor_content == c_source
 211                                                 || neighbor_content == c_flowing);
 212
 213                                 // Don't draw any faces if neighbor same is liquid and top is
 214                                 // same liquid
 215                                 if(neighbor_is_same_liquid && !top_is_same_liquid)
 216                                         continue;
 217
 218                                 // Use backface culled material if neighbor doesn't have a
 219                                 // solidness of 0
 220                                 const TileSpec *current_tile = &tile_liquid;
 221                                 if(n_feat.solidness != 0 || n_feat.visual_solidness != 0)
 222                                         current_tile = &tile_liquid_bfculled;
 223
 224                                 video::S3DVertex vertices[4] =
 225                                 {
 226                                         video::S3DVertex(-BS/2,0,BS/2,0,0,0, c,
 227                                                         pa_liquid.x0(), pa_liquid.y1()),
 228                                         video::S3DVertex(BS/2,0,BS/2,0,0,0, c,
 229                                                         pa_liquid.x1(), pa_liquid.y1()),
 230                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c,
 231                                                         pa_liquid.x1(), pa_liquid.y0()),
 232                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c,
 233                                                         pa_liquid.x0(), pa_liquid.y0()),
 234                                 };
 235
 236                                 /*
 237                                         If our topside is liquid, set upper border of face
 238                                         at upper border of node
 239                                 */
 240                                 if(top_is_same_liquid)
 241                                 {
 242                                         vertices[2].Pos.Y = 0.5*BS;
 243                                         vertices[3].Pos.Y = 0.5*BS;
 244                                 }
 245                                 /*
 246                                         Otherwise upper position of face is liquid level
 247                                 */
 248                                 else
 249                                 {
 250                                         vertices[2].Pos.Y = (node_liquid_level-0.5)*BS;
 251                                         vertices[3].Pos.Y = (node_liquid_level-0.5)*BS;
 252                                 }
 253                                 /*
 254                                         If neighbor is liquid, lower border of face is liquid level
 255                                 */
 256                                 if(neighbor_is_same_liquid)
 257                                 {
 258                                         vertices[0].Pos.Y = (node_liquid_level-0.5)*BS;
 259                                         vertices[1].Pos.Y = (node_liquid_level-0.5)*BS;
 260                                 }
 261                                 /*
 262                                         If neighbor is not liquid, lower border of face is
 263                                         lower border of node
 264                                 */
 265                                 else
 266                                 {
 267                                         vertices[0].Pos.Y = -0.5*BS;
 268                                         vertices[1].Pos.Y = -0.5*BS;
 269                                 }
 270
 271                                 for(s32 j=0; j<4; j++)
 272                                 {
 273                                         if(dir == v3s16(0,0,1))
 274                                                 vertices[j].Pos.rotateXZBy(0);
 275                                         if(dir == v3s16(0,0,-1))
 276                                                 vertices[j].Pos.rotateXZBy(180);
 277                                         if(dir == v3s16(-1,0,0))
 278                                                 vertices[j].Pos.rotateXZBy(90);
 279                                         if(dir == v3s16(1,0,-0))
 280                                                 vertices[j].Pos.rotateXZBy(-90);
 281
 282                                         // Do this to not cause glitches when two liquids are
 283                                         // side-by-side
 284                                         /*if(neighbor_is_same_liquid == false){
 285                                                 vertices[j].Pos.X *= 0.98;
 286                                                 vertices[j].Pos.Z *= 0.98;
 287                                         }*/
 288
 289                                         vertices[j].Pos += intToFloat(p, BS);
 290                                 }
 291
 292                                 u16 indices[] = {0,1,2,2,3,0};
 293                                 // Add to mesh collector
 294                                 collector.append(*current_tile, vertices, 4, indices, 6);
 295                         }
 296
 297                         /*
 298                                 Generate top
 299                          */
 300                         if(top_is_same_liquid)
 301                                 continue;
 302
 303                         video::S3DVertex vertices[4] =
 304                         {
 305                                 video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c,
 306                                                 pa_liquid.x0(), pa_liquid.y1()),
 307                                 video::S3DVertex(BS/2,0,BS/2, 0,0,0, c,
 308                                                 pa_liquid.x1(), pa_liquid.y1()),
 309                                 video::S3DVertex(BS/2,0,-BS/2, 0,0,0, c,
 310                                                 pa_liquid.x1(), pa_liquid.y0()),
 311                                 video::S3DVertex(-BS/2,0,-BS/2, 0,0,0, c,
 312                                                 pa_liquid.x0(), pa_liquid.y0()),
 313                         };
 314
 315                         v3f offset(p.X*BS, p.Y*BS + (-0.5+node_liquid_level)*BS, p.Z*BS);
 316                         for(s32 i=0; i<4; i++)
 317                         {
 318                                 vertices[i].Pos += offset;
 319                         }
 320
 321                         u16 indices[] = {0,1,2,2,3,0};
 322                         // Add to mesh collector
 323                         collector.append(tile_liquid, vertices, 4, indices, 6);
 324                 break;}
 325                 case NDT_FLOWINGLIQUID:
 326                 {
 327                         /*
 328                                 Add flowing liquid to mesh
 329                         */
 330                         TileSpec tile_liquid = f.special_tiles[0];
 331                         TileSpec tile_liquid_bfculled = f.special_tiles[1];
 332                         AtlasPointer &pa_liquid = tile_liquid.texture;
 333
 334                         bool top_is_same_liquid = false;
 335                         MapNode ntop = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y+1,z));
 336                         content_t c_flowing = nodedef->getId(f.liquid_alternative_flowing);
 337                         content_t c_source = nodedef->getId(f.liquid_alternative_source);
 338                         if(ntop.getContent() == c_flowing || ntop.getContent() == c_source)
 339                                 top_is_same_liquid = true;
 340
 341                         u16 l = 0;
 342                         // If this liquid emits light and doesn't contain light, draw
 343                         // it at what it emits, for an increased effect
 344                         u8 light_source = nodedef->get(n).light_source;
 345                         if(light_source != 0){
 346                                 //l = decode_light(undiminish_light(light_source));
 347                                 l = decode_light(light_source);
 348                                 l = l | (l<<8);
 349                         }
 350                         // Use the light of the node on top if possible
 351                         else if(nodedef->get(ntop).param_type == CPT_LIGHT)
 352                                 l = getInteriorLight(ntop, 0, data);
 353                         // Otherwise use the light of this node (the liquid)
 354                         else
 355                                 l = getInteriorLight(n, 0, data);
 356                         video::SColor c = MapBlock_LightColor(f.alpha, l, decode_light(f.light_source));
 357
 358                         // Neighbor liquid levels (key = relative position)
 359                         // Includes current node
 360                         std::map<v3s16, f32> neighbor_levels;
 361                         std::map<v3s16, content_t> neighbor_contents;
 362                         std::map<v3s16, u8> neighbor_flags;
 363                         const u8 neighborflag_top_is_same_liquid = 0x01;
 364                         v3s16 neighbor_dirs[9] = {
 365                                 v3s16(0,0,0),
 366                                 v3s16(0,0,1),
 367                                 v3s16(0,0,-1),
 368                                 v3s16(1,0,0),
 369                                 v3s16(-1,0,0),
 370                                 v3s16(1,0,1),
 371                                 v3s16(-1,0,-1),
 372                                 v3s16(1,0,-1),
 373                                 v3s16(-1,0,1),
 374                         };
 375                         for(u32 i=0; i<9; i++)
 376                         {
 377                                 content_t content = CONTENT_AIR;
 378                                 float level = -0.5 * BS;
 379                                 u8 flags = 0;
 380                                 // Check neighbor
 381                                 v3s16 p2 = p + neighbor_dirs[i];
 382                                 MapNode n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
 383                                 if(n2.getContent() != CONTENT_IGNORE)
 384                                 {
 385                                         content = n2.getContent();
 386
 387                                         if(n2.getContent() == c_source)
 388                                                 level = (-0.5+node_liquid_level) * BS;
 389                                         else if(n2.getContent() == c_flowing)
 390                                                 level = (-0.5 + ((float)(n2.param2&LIQUID_LEVEL_MASK)
 391                                                                 + 0.5) / (float)LIQUID_LEVEL_SOURCE * node_liquid_level) * BS;
 392
 393                                         // Check node above neighbor.
 394                                         // NOTE: This doesn't get executed if neighbor
 395                                         //       doesn't exist
 396                                         p2.Y += 1;
 397                                         n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
 398                                         if(n2.getContent() == c_source ||
 399                                                         n2.getContent() == c_flowing)
 400                                                 flags |= neighborflag_top_is_same_liquid;
 401                                 }
 402
 403                                 neighbor_levels[neighbor_dirs[i]] = level;
 404                                 neighbor_contents[neighbor_dirs[i]] = content;
 405                                 neighbor_flags[neighbor_dirs[i]] = flags;
 406                         }
 407
 408                         // Corner heights (average between four liquids)
 409                         f32 corner_levels[4];
 410
 411                         v3s16 halfdirs[4] = {
 412                                 v3s16(0,0,0),
 413                                 v3s16(1,0,0),
 414                                 v3s16(1,0,1),
 415                                 v3s16(0,0,1),
 416                         };
 417                         for(u32 i=0; i<4; i++)
 418                         {
 419                                 v3s16 cornerdir = halfdirs[i];
 420                                 float cornerlevel = 0;
 421                                 u32 valid_count = 0;
 422                                 u32 air_count = 0;
 423                                 for(u32 j=0; j<4; j++)
 424                                 {
 425                                         v3s16 neighbordir = cornerdir - halfdirs[j];
 426                                         content_t content = neighbor_contents[neighbordir];
 427                                         // If top is liquid, draw starting from top of node
 428                                         if(neighbor_flags[neighbordir] &
 429                                                         neighborflag_top_is_same_liquid)
 430                                         {
 431                                                 cornerlevel = 0.5*BS;
 432                                                 valid_count = 1;
 433                                                 break;
 434                                         }
 435                                         // Source is always the same height
 436                                         else if(content == c_source)
 437                                         {
 438                                                 cornerlevel = (-0.5+node_liquid_level)*BS;
 439                                                 valid_count = 1;
 440                                                 break;
 441                                         }
 442                                         // Flowing liquid has level information
 443                                         else if(content == c_flowing)
 444                                         {
 445                                                 cornerlevel += neighbor_levels[neighbordir];
 446                                                 valid_count++;
 447                                         }
 448                                         else if(content == CONTENT_AIR)
 449                                         {
 450                                                 air_count++;
 451                                         }
 452                                 }
 453                                 if(air_count >= 2)
 454                                         cornerlevel = -0.5*BS+0.2;
 455                                 else if(valid_count > 0)
 456                                         cornerlevel /= valid_count;
 457                                 corner_levels[i] = cornerlevel;
 458                         }
 459
 460                         /*
 461                                 Generate sides
 462                         */
 463
 464                         v3s16 side_dirs[4] = {
 465                                 v3s16(1,0,0),
 466                                 v3s16(-1,0,0),
 467                                 v3s16(0,0,1),
 468                                 v3s16(0,0,-1),
 469                         };
 470                         s16 side_corners[4][2] = {
 471                                 {1, 2},
 472                                 {3, 0},
 473                                 {2, 3},
 474                                 {0, 1},
 475                         };
 476                         for(u32 i=0; i<4; i++)
 477                         {
 478                                 v3s16 dir = side_dirs[i];
 479
 480                                 /*
 481                                         If our topside is liquid and neighbor's topside
 482                                         is liquid, don't draw side face
 483                                 */
 484                                 if(top_is_same_liquid &&
 485                                                 neighbor_flags[dir] & neighborflag_top_is_same_liquid)
 486                                         continue;
 487
 488                                 content_t neighbor_content = neighbor_contents[dir];
 489                                 const ContentFeatures &n_feat = nodedef->get(neighbor_content);
 490
 491                                 // Don't draw face if neighbor is blocking the view
 492                                 if(n_feat.solidness == 2)
 493                                         continue;
 494
 495                                 bool neighbor_is_same_liquid = (neighbor_content == c_source
 496                                                 || neighbor_content == c_flowing);
 497
 498                                 // Don't draw any faces if neighbor same is liquid and top is
 499                                 // same liquid
 500                                 if(neighbor_is_same_liquid == true
 501                                                 && top_is_same_liquid == false)
 502                                         continue;
 503
 504                                 // Use backface culled material if neighbor doesn't have a
 505                                 // solidness of 0
 506                                 const TileSpec *current_tile = &tile_liquid;
 507                                 if(n_feat.solidness != 0 || n_feat.visual_solidness != 0)
 508                                         current_tile = &tile_liquid_bfculled;
 509
 510                                 video::S3DVertex vertices[4] =
 511                                 {
 512                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c,
 513                                                         pa_liquid.x0(), pa_liquid.y1()),
 514                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c,
 515                                                         pa_liquid.x1(), pa_liquid.y1()),
 516                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c,
 517                                                         pa_liquid.x1(), pa_liquid.y0()),
 518                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c,
 519                                                         pa_liquid.x0(), pa_liquid.y0()),
 520                                 };
 521
 522                                 /*
 523                                         If our topside is liquid, set upper border of face
 524                                         at upper border of node
 525                                 */
 526                                 if(top_is_same_liquid)
 527                                 {
 528                                         vertices[2].Pos.Y = 0.5*BS;
 529                                         vertices[3].Pos.Y = 0.5*BS;
 530                                 }
 531                                 /*
 532                                         Otherwise upper position of face is corner levels
 533                                 */
 534                                 else
 535                                 {
 536                                         vertices[2].Pos.Y = corner_levels[side_corners[i][0]];
 537                                         vertices[3].Pos.Y = corner_levels[side_corners[i][1]];
 538                                 }
 539
 540                                 /*
 541                                         If neighbor is liquid, lower border of face is corner
 542                                         liquid levels
 543                                 */
 544                                 if(neighbor_is_same_liquid)
 545                                 {
 546                                         vertices[0].Pos.Y = corner_levels[side_corners[i][1]];
 547                                         vertices[1].Pos.Y = corner_levels[side_corners[i][0]];
 548                                 }
 549                                 /*
 550                                         If neighbor is not liquid, lower border of face is
 551                                         lower border of node
 552                                 */
 553                                 else
 554                                 {
 555                                         vertices[0].Pos.Y = -0.5*BS;
 556                                         vertices[1].Pos.Y = -0.5*BS;
 557                                 }
 558
 559                                 for(s32 j=0; j<4; j++)
 560                                 {
 561                                         if(dir == v3s16(0,0,1))
 562                                                 vertices[j].Pos.rotateXZBy(0);
 563                                         if(dir == v3s16(0,0,-1))
 564                                                 vertices[j].Pos.rotateXZBy(180);
 565                                         if(dir == v3s16(-1,0,0))
 566                                                 vertices[j].Pos.rotateXZBy(90);
 567                                         if(dir == v3s16(1,0,-0))
 568                                                 vertices[j].Pos.rotateXZBy(-90);
 569
 570                                         // Do this to not cause glitches when two liquids are
 571                                         // side-by-side
 572                                         /*if(neighbor_is_same_liquid == false){
 573                                                 vertices[j].Pos.X *= 0.98;
 574                                                 vertices[j].Pos.Z *= 0.98;
 575                                         }*/
 576
 577                                         vertices[j].Pos += intToFloat(p, BS);
 578                                 }
 579
 580                                 u16 indices[] = {0,1,2,2,3,0};
 581                                 // Add to mesh collector
 582                                 collector.append(*current_tile, vertices, 4, indices, 6);
 583                         }
 584
 585                         /*
 586                                 Generate top side, if appropriate
 587                         */
 588
 589                         if(top_is_same_liquid == false)
 590                         {
 591                                 video::S3DVertex vertices[4] =
 592                                 {
 593                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c,
 594                                                         pa_liquid.x0(), pa_liquid.y1()),
 595                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c,
 596                                                         pa_liquid.x1(), pa_liquid.y1()),
 597                                         video::S3DVertex(BS/2,0,-BS/2, 0,0,0, c,
 598                                                         pa_liquid.x1(), pa_liquid.y0()),
 599                                         video::S3DVertex(-BS/2,0,-BS/2, 0,0,0, c,
 600                                                         pa_liquid.x0(), pa_liquid.y0()),
 601                                 };
 602
 603                                 // To get backface culling right, the vertices need to go
 604                                 // clockwise around the front of the face. And we happened to
 605                                 // calculate corner levels in exact reverse order.
 606                                 s32 corner_resolve[4] = {3,2,1,0};
 607
 608                                 for(s32 i=0; i<4; i++)
 609                                 {
 610                                         //vertices[i].Pos.Y += liquid_level;
 611                                         //vertices[i].Pos.Y += neighbor_levels[v3s16(0,0,0)];
 612                                         s32 j = corner_resolve[i];
 613                                         vertices[i].Pos.Y += corner_levels[j];
 614                                         vertices[i].Pos += intToFloat(p, BS);
 615                                 }
 616
 617                                 // Default downwards-flowing texture animation goes from
 618                                 // -Z towards +Z, thus the direction is +Z.
 619                                 // Rotate texture to make animation go in flow direction
 620                                 // Positive if liquid moves towards +Z
 621                                 int dz = (corner_levels[side_corners[3][0]] +
 622                                                 corner_levels[side_corners[3][1]]) -
 623                                                 (corner_levels[side_corners[2][0]] +
 624                                                 corner_levels[side_corners[2][1]]);
 625                                 // Positive if liquid moves towards +X
 626                                 int dx = (corner_levels[side_corners[1][0]] +
 627                                                 corner_levels[side_corners[1][1]]) -
 628                                                 (corner_levels[side_corners[0][0]] +
 629                                                 corner_levels[side_corners[0][1]]);
 630                                 // -X
 631                                 if(-dx >= abs(dz))
 632                                 {
 633                                         v2f t = vertices[0].TCoords;
 634                                         vertices[0].TCoords = vertices[1].TCoords;
 635                                         vertices[1].TCoords = vertices[2].TCoords;
 636                                         vertices[2].TCoords = vertices[3].TCoords;
 637                                         vertices[3].TCoords = t;
 638                                 }
 639                                 // +X
 640                                 if(dx >= abs(dz))
 641                                 {
 642                                         v2f t = vertices[0].TCoords;
 643                                         vertices[0].TCoords = vertices[3].TCoords;
 644                                         vertices[3].TCoords = vertices[2].TCoords;
 645                                         vertices[2].TCoords = vertices[1].TCoords;
 646                                         vertices[1].TCoords = t;
 647                                 }
 648                                 // -Z
 649                                 if(-dz >= abs(dx))
 650                                 {
 651                                         v2f t = vertices[0].TCoords;
 652                                         vertices[0].TCoords = vertices[3].TCoords;
 653                                         vertices[3].TCoords = vertices[2].TCoords;
 654                                         vertices[2].TCoords = vertices[1].TCoords;
 655                                         vertices[1].TCoords = t;
 656                                         t = vertices[0].TCoords;
 657                                         vertices[0].TCoords = vertices[3].TCoords;
 658                                         vertices[3].TCoords = vertices[2].TCoords;
 659                                         vertices[2].TCoords = vertices[1].TCoords;
 660                                         vertices[1].TCoords = t;
 661                                 }
 662
 663                                 u16 indices[] = {0,1,2,2,3,0};
 664                                 // Add to mesh collector
 665                                 collector.append(tile_liquid, vertices, 4, indices, 6);
 666                         }
 667                 break;}
 668                 case NDT_GLASSLIKE:
 669                 {
 670                         TileSpec tile = getNodeTile(n, p, v3s16(0,0,0), data);
 671                         AtlasPointer ap = tile.texture;
 672
 673                         u16 l = getInteriorLight(n, 1, data);
 674                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 675
 676                         for(u32 j=0; j<6; j++)
 677                         {
 678                                 // Check this neighbor
 679                                 v3s16 n2p = blockpos_nodes + p + g_6dirs[j];
 680                                 MapNode n2 = data->m_vmanip.getNodeNoEx(n2p);
 681                                 // Don't make face if neighbor is of same type
 682                                 if(n2.getContent() == n.getContent())
 683                                         continue;
 684
 685                                 // The face at Z+
 686                                 video::S3DVertex vertices[4] =
 687                                 {
 688                                         video::S3DVertex(-BS/2,-BS/2,BS/2, 0,0,0, c,
 689                                                 ap.x0(), ap.y1()),
 690                                         video::S3DVertex(BS/2,-BS/2,BS/2, 0,0,0, c,
 691                                                 ap.x1(), ap.y1()),
 692                                         video::S3DVertex(BS/2,BS/2,BS/2, 0,0,0, c,
 693                                                 ap.x1(), ap.y0()),
 694                                         video::S3DVertex(-BS/2,BS/2,BS/2, 0,0,0, c,
 695                                                 ap.x0(), ap.y0()),
 696                                 };
 697
 698                                 // Rotations in the g_6dirs format
 699                                 if(j == 0) // Z+
 700                                         for(u16 i=0; i<4; i++)
 701                                                 vertices[i].Pos.rotateXZBy(0);
 702                                 else if(j == 1) // Y+
 703                                         for(u16 i=0; i<4; i++)
 704                                                 vertices[i].Pos.rotateYZBy(-90);
 705                                 else if(j == 2) // X+
 706                                         for(u16 i=0; i<4; i++)
 707                                                 vertices[i].Pos.rotateXZBy(-90);
 708                                 else if(j == 3) // Z-
 709                                         for(u16 i=0; i<4; i++)
 710                                                 vertices[i].Pos.rotateXZBy(180);
 711                                 else if(j == 4) // Y-
 712                                         for(u16 i=0; i<4; i++)
 713                                                 vertices[i].Pos.rotateYZBy(90);
 714                                 else if(j == 5) // X-
 715                                         for(u16 i=0; i<4; i++)
 716                                                 vertices[i].Pos.rotateXZBy(90);
 717
 718                                 for(u16 i=0; i<4; i++){
 719                                         vertices[i].Pos += intToFloat(p, BS);
 720                                 }
 721
 722                                 u16 indices[] = {0,1,2,2,3,0};
 723                                 // Add to mesh collector
 724                                 collector.append(tile, vertices, 4, indices, 6);
 725                         }
 726                 break;}
 727                 case NDT_ALLFACES:
 728                 {
 729                         TileSpec tile_leaves = getNodeTile(n, p,
 730                                         v3s16(0,0,0), data);
 731                         AtlasPointer pa_leaves = tile_leaves.texture;
 732
 733                         u16 l = getInteriorLight(n, 1, data);
 734                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 735
 736                         v3f pos = intToFloat(p, BS);
 737                         aabb3f box(-BS/2,-BS/2,-BS/2,BS/2,BS/2,BS/2);
 738                         box.MinEdge += pos;
 739                         box.MaxEdge += pos;
 740                         makeCuboid(&collector, box, &tile_leaves, 1, c, NULL);
 741                 break;}
 742                 case NDT_ALLFACES_OPTIONAL:
 743                         // This is always pre-converted to something else
 744                         assert(0);
 745                         break;
 746                 case NDT_TORCHLIKE:
 747                 {
 748                         v3s16 dir = n.getWallMountedDir(nodedef);
 749
 750                         u8 tileindex = 0;
 751                         if(dir == v3s16(0,-1,0)){
 752                                 tileindex = 0; // floor
 753                         } else if(dir == v3s16(0,1,0)){
 754                                 tileindex = 1; // ceiling
 755                         // For backwards compatibility
 756                         } else if(dir == v3s16(0,0,0)){
 757                                 tileindex = 0; // floor
 758                         } else {
 759                                 tileindex = 2; // side
 760                         }
 761
 762                         TileSpec tile = getNodeTileN(n, p, tileindex, data);
 763                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
 764                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
 765
 766                         AtlasPointer ap = tile.texture;
 767
 768                         u16 l = getInteriorLight(n, 1, data);
 769                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 770
 771                         // Wall at X+ of node
 772                         video::S3DVertex vertices[4] =
 773                         {
 774                                 video::S3DVertex(-BS/2,-BS/2,0, 0,0,0, c,
 775                                                 ap.x0(), ap.y1()),
 776                                 video::S3DVertex(BS/2,-BS/2,0, 0,0,0, c,
 777                                                 ap.x1(), ap.y1()),
 778                                 video::S3DVertex(BS/2,BS/2,0, 0,0,0, c,
 779                                                 ap.x1(), ap.y0()),
 780                                 video::S3DVertex(-BS/2,BS/2,0, 0,0,0, c,
 781                                                 ap.x0(), ap.y0()),
 782                         };
 783
 784                         for(s32 i=0; i<4; i++)
 785                         {
 786                                 if(dir == v3s16(1,0,0))
 787                                         vertices[i].Pos.rotateXZBy(0);
 788                                 if(dir == v3s16(-1,0,0))
 789                                         vertices[i].Pos.rotateXZBy(180);
 790                                 if(dir == v3s16(0,0,1))
 791                                         vertices[i].Pos.rotateXZBy(90);
 792                                 if(dir == v3s16(0,0,-1))
 793                                         vertices[i].Pos.rotateXZBy(-90);
 794                                 if(dir == v3s16(0,-1,0))
 795                                         vertices[i].Pos.rotateXZBy(45);
 796                                 if(dir == v3s16(0,1,0))
 797                                         vertices[i].Pos.rotateXZBy(-45);
 798
 799                                 vertices[i].Pos += intToFloat(p, BS);
 800                         }
 801
 802                         u16 indices[] = {0,1,2,2,3,0};
 803                         // Add to mesh collector
 804                         collector.append(tile, vertices, 4, indices, 6);
 805                 break;}
 806                 case NDT_SIGNLIKE:
 807                 {
 808                         TileSpec tile = getNodeTileN(n, p, 0, data);
 809                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
 810                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
 811                         AtlasPointer ap = tile.texture;
 812
 813                         u16 l = getInteriorLight(n, 0, data);
 814                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 815
 816                         float d = (float)BS/16;
 817                         // Wall at X+ of node
 818                         video::S3DVertex vertices[4] =
 819                         {
 820                                 video::S3DVertex(BS/2-d,BS/2,BS/2, 0,0,0, c,
 821                                                 ap.x0(), ap.y0()),
 822                                 video::S3DVertex(BS/2-d,BS/2,-BS/2, 0,0,0, c,
 823                                                 ap.x1(), ap.y0()),
 824                                 video::S3DVertex(BS/2-d,-BS/2,-BS/2, 0,0,0, c,
 825                                                 ap.x1(), ap.y1()),
 826                                 video::S3DVertex(BS/2-d,-BS/2,BS/2, 0,0,0, c,
 827                                                 ap.x0(), ap.y1()),
 828                         };
 829
 830                         v3s16 dir = n.getWallMountedDir(nodedef);
 831
 832                         for(s32 i=0; i<4; i++)
 833                         {
 834                                 if(dir == v3s16(1,0,0))
 835                                         vertices[i].Pos.rotateXZBy(0);
 836                                 if(dir == v3s16(-1,0,0))
 837                                         vertices[i].Pos.rotateXZBy(180);
 838                                 if(dir == v3s16(0,0,1))
 839                                         vertices[i].Pos.rotateXZBy(90);
 840                                 if(dir == v3s16(0,0,-1))
 841                                         vertices[i].Pos.rotateXZBy(-90);
 842                                 if(dir == v3s16(0,-1,0))
 843                                         vertices[i].Pos.rotateXYBy(-90);
 844                                 if(dir == v3s16(0,1,0))
 845                                         vertices[i].Pos.rotateXYBy(90);
 846
 847                                 vertices[i].Pos += intToFloat(p, BS);
 848                         }
 849
 850                         u16 indices[] = {0,1,2,2,3,0};
 851                         // Add to mesh collector
 852                         collector.append(tile, vertices, 4, indices, 6);
 853                 break;}
 854                 case NDT_PLANTLIKE:
 855                 {
 856                         TileSpec tile = getNodeTileN(n, p, 0, data);
 857                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
 858                         AtlasPointer ap = tile.texture;
 859
 860                         u16 l = getInteriorLight(n, 1, data);
 861                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 862
 863                         for(u32 j=0; j<2; j++)
 864                         {
 865                                 video::S3DVertex vertices[4] =
 866                                 {
 867                                         video::S3DVertex(-BS/2*f.visual_scale,-BS/2,0, 0,0,0, c,
 868                                                 ap.x0(), ap.y1()),
 869                                         video::S3DVertex( BS/2*f.visual_scale,-BS/2,0, 0,0,0, c,
 870                                                 ap.x1(), ap.y1()),
 871                                         video::S3DVertex( BS/2*f.visual_scale,
 872                                                 -BS/2 + f.visual_scale*BS,0, 0,0,0, c,
 873                                                 ap.x1(), ap.y0()),
 874                                         video::S3DVertex(-BS/2*f.visual_scale,
 875                                                 -BS/2 + f.visual_scale*BS,0, 0,0,0, c,
 876                                                 ap.x0(), ap.y0()),
 877                                 };
 878
 879                                 if(j == 0)
 880                                 {
 881                                         for(u16 i=0; i<4; i++)
 882                                                 vertices[i].Pos.rotateXZBy(45);
 883                                 }
 884                                 else if(j == 1)
 885                                 {
 886                                         for(u16 i=0; i<4; i++)
 887                                                 vertices[i].Pos.rotateXZBy(-45);
 888                                 }
 889
 890                                 for(u16 i=0; i<4; i++)
 891                                 {
 892                                         vertices[i].Pos *= f.visual_scale;
 893                                         vertices[i].Pos += intToFloat(p, BS);
 894                                 }
 895
 896                                 u16 indices[] = {0,1,2,2,3,0};
 897                                 // Add to mesh collector
 898                                 collector.append(tile, vertices, 4, indices, 6);
 899                         }
 900                 break;}
 901                 case NDT_FENCELIKE:
 902                 {
 903                         TileSpec tile = getNodeTile(n, p, v3s16(0,0,0), data);
 904                         TileSpec tile_nocrack = tile;
 905                         tile_nocrack.material_flags &= ~MATERIAL_FLAG_CRACK;
 906
 907                         // A hack to put wood the right way around in the posts
 908                         ITextureSource *tsrc = data->m_gamedef->tsrc();
 909                         TileSpec tile_rot = tile;
 910                         tile_rot.texture = tsrc->getTexture(tsrc->getTextureName(
 911                                         tile.texture.id) + "^[transformR90");
 912
 913                         u16 l = getInteriorLight(n, 1, data);
 914                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 915
 916                         const f32 post_rad=(f32)BS/8;
 917                         const f32 bar_rad=(f32)BS/16;
 918                         const f32 bar_len=(f32)(BS/2)-post_rad;
 919
 920                         v3f pos = intToFloat(p, BS);
 921
 922                         // The post - always present
 923                         aabb3f post(-post_rad,-BS/2,-post_rad,post_rad,BS/2,post_rad);
 924                         post.MinEdge += pos;
 925                         post.MaxEdge += pos;
 926                         f32 postuv[24]={
 927                                         6/16.,6/16.,10/16.,10/16.,
 928                                         6/16.,6/16.,10/16.,10/16.,
 929                                         0/16.,0,4/16.,1,
 930                                         4/16.,0,8/16.,1,
 931                                         8/16.,0,12/16.,1,
 932                                         12/16.,0,16/16.,1};
 933                         makeCuboid(&collector, post, &tile_rot, 1, c, postuv);
 934
 935                         // Now a section of fence, +X, if there's a post there
 936                         v3s16 p2 = p;
 937                         p2.X++;
 938                         MapNode n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
 939                         const ContentFeatures *f2 = &nodedef->get(n2);
 940                         if(f2->drawtype == NDT_FENCELIKE)
 941                         {
 942                                 aabb3f bar(-bar_len+BS/2,-bar_rad+BS/4,-bar_rad,
 943                                                 bar_len+BS/2,bar_rad+BS/4,bar_rad);
 944                                 bar.MinEdge += pos;
 945                                 bar.MaxEdge += pos;
 946                                 f32 xrailuv[24]={
 947                                         0/16.,2/16.,16/16.,4/16.,
 948                                         0/16.,4/16.,16/16.,6/16.,
 949                                         6/16.,6/16.,8/16.,8/16.,
 950                                         10/16.,10/16.,12/16.,12/16.,
 951                                         0/16.,8/16.,16/16.,10/16.,
 952                                         0/16.,14/16.,16/16.,16/16.};
 953                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
 954                                                 c, xrailuv);
 955                                 bar.MinEdge.Y -= BS/2;
 956                                 bar.MaxEdge.Y -= BS/2;
 957                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
 958                                                 c, xrailuv);
 959                         }
 960
 961                         // Now a section of fence, +Z, if there's a post there
 962                         p2 = p;
 963                         p2.Z++;
 964                         n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
 965                         f2 = &nodedef->get(n2);
 966                         if(f2->drawtype == NDT_FENCELIKE)
 967                         {
 968                                 aabb3f bar(-bar_rad,-bar_rad+BS/4,-bar_len+BS/2,
 969                                                 bar_rad,bar_rad+BS/4,bar_len+BS/2);
 970                                 bar.MinEdge += pos;
 971                                 bar.MaxEdge += pos;
 972                                 f32 zrailuv[24]={
 973                                         3/16.,1/16.,5/16.,5/16., // cannot rotate; stretch
 974                                         4/16.,1/16.,6/16.,5/16., // for wood texture instead
 975                                         0/16.,9/16.,16/16.,11/16.,
 976                                         0/16.,6/16.,16/16.,8/16.,
 977                                         6/16.,6/16.,8/16.,8/16.,
 978                                         10/16.,10/16.,12/16.,12/16.};
 979                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
 980                                                 c, zrailuv);
 981                                 bar.MinEdge.Y -= BS/2;
 982                                 bar.MaxEdge.Y -= BS/2;
 983                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
 984                                                 c, zrailuv);
 985                         }
 986                 break;}
 987                 case NDT_RAILLIKE:
 988                 {
 989                         bool is_rail_x [] = { false, false };  /* x-1, x+1 */
 990                         bool is_rail_z [] = { false, false };  /* z-1, z+1 */
 991
 992                         bool is_rail_z_minus_y [] = { false, false };  /* z-1, z+1; y-1 */
 993                         bool is_rail_x_minus_y [] = { false, false };  /* x-1, z+1; y-1 */
 994                         bool is_rail_z_plus_y [] = { false, false };  /* z-1, z+1; y+1 */
 995                         bool is_rail_x_plus_y [] = { false, false };  /* x-1, x+1; y+1 */
 996
 997                         MapNode n_minus_x = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1,y,z));
 998                         MapNode n_plus_x = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1,y,z));
 999                         MapNode n_minus_z = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y,z-1));
1000                         MapNode n_plus_z = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y,z+1));
1001                         MapNode n_plus_x_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1, y+1, z));
1002                         MapNode n_plus_x_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1, y-1, z));
1003                         MapNode n_minus_x_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1, y+1, z));
1004                         MapNode n_minus_x_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1, y-1, z));
1005                         MapNode n_plus_z_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y+1, z+1));
1006                         MapNode n_minus_z_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y+1, z-1));
1007                         MapNode n_plus_z_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y-1, z+1));
1008                         MapNode n_minus_z_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y-1, z-1));
1009
1010                         content_t thiscontent = n.getContent();
1011                         if(n_minus_x.getContent() == thiscontent)
1012                                 is_rail_x[0] = true;
1013                         if (n_minus_x_minus_y.getContent() == thiscontent)
1014                                 is_rail_x_minus_y[0] = true;
1015                         if(n_minus_x_plus_y.getContent() == thiscontent)
1016                                 is_rail_x_plus_y[0] = true;
1017
1018                         if(n_plus_x.getContent() == thiscontent)
1019                                 is_rail_x[1] = true;
1020                         if (n_plus_x_minus_y.getContent() == thiscontent)
1021                                 is_rail_x_minus_y[1] = true;
1022                         if(n_plus_x_plus_y.getContent() == thiscontent)
1023                                 is_rail_x_plus_y[1] = true;
1024
1025                         if(n_minus_z.getContent() == thiscontent)
1026                                 is_rail_z[0] = true;
1027                         if (n_minus_z_minus_y.getContent() == thiscontent)
1028                                 is_rail_z_minus_y[0] = true;
1029                         if(n_minus_z_plus_y.getContent() == thiscontent)
1030                                 is_rail_z_plus_y[0] = true;
1031
1032                         if(n_plus_z.getContent() == thiscontent)
1033                                 is_rail_z[1] = true;
1034                         if (n_plus_z_minus_y.getContent() == thiscontent)
1035                                 is_rail_z_minus_y[1] = true;
1036                         if(n_plus_z_plus_y.getContent() == thiscontent)
1037                                 is_rail_z_plus_y[1] = true;
1038
1039                         bool is_rail_x_all[] = {false, false};
1040                         bool is_rail_z_all[] = {false, false};
1041                         is_rail_x_all[0]=is_rail_x[0] || is_rail_x_minus_y[0] || is_rail_x_plus_y[0];
1042                         is_rail_x_all[1]=is_rail_x[1] || is_rail_x_minus_y[1] || is_rail_x_plus_y[1];
1043                         is_rail_z_all[0]=is_rail_z[0] || is_rail_z_minus_y[0] || is_rail_z_plus_y[0];
1044                         is_rail_z_all[1]=is_rail_z[1] || is_rail_z_minus_y[1] || is_rail_z_plus_y[1];
1045
1046                         // reasonable default, flat straight unrotated rail
1047                         bool is_straight = true;
1048                         int adjacencies = 0;
1049                         int angle = 0;
1050                         u8 tileindex = 0;
1051
1052                         // check for sloped rail
1053                         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])
1054                         {
1055                                 adjacencies = 5; //5 means sloped
1056                                 is_straight = true; // sloped is always straight
1057                         }
1058                         else
1059                         {
1060                                 // is really straight, rails on both sides
1061                                 is_straight = (is_rail_x_all[0] && is_rail_x_all[1]) || (is_rail_z_all[0] && is_rail_z_all[1]);
1062                                 adjacencies = is_rail_x_all[0] + is_rail_x_all[1] + is_rail_z_all[0] + is_rail_z_all[1];
1063                         }
1064
1065                         switch (adjacencies) {
1066                         case 1:
1067                                 if(is_rail_x_all[0] || is_rail_x_all[1])
1068                                         angle = 90;
1069                                 break;
1070                         case 2:
1071                                 if(!is_straight)
1072                                         tileindex = 1; // curved
1073                                 if(is_rail_x_all[0] && is_rail_x_all[1])
1074                                         angle = 90;
1075                                 if(is_rail_z_all[0] && is_rail_z_all[1]){
1076                                         if (n_minus_z_plus_y.getContent() == thiscontent) angle = 180;
1077                                 }
1078                                 else if(is_rail_x_all[0] && is_rail_z_all[0])
1079                                         angle = 270;
1080                                 else if(is_rail_x_all[0] && is_rail_z_all[1])
1081                                         angle = 180;
1082                                 else if(is_rail_x_all[1] && is_rail_z_all[1])
1083                                         angle = 90;
1084                                 break;
1085                         case 3:
1086                                 // here is where the potential to 'switch' a junction is, but not implemented at present
1087                                 tileindex = 2; // t-junction
1088                                 if(!is_rail_x_all[1])
1089                                         angle=180;
1090                                 if(!is_rail_z_all[0])
1091                                         angle=90;
1092                                 if(!is_rail_z_all[1])
1093                                         angle=270;
1094                                 break;
1095                         case 4:
1096                                 tileindex = 3; // crossing
1097                                 break;
1098                         case 5: //sloped
1099                                 if(is_rail_z_plus_y[0])
1100                                         angle = 180;
1101                                 if(is_rail_x_plus_y[0])
1102                                         angle = 90;
1103                                 if(is_rail_x_plus_y[1])
1104                                         angle = -90;
1105                                 break;
1106                         default:
1107                                 break;
1108                         }
1109
1110                         TileSpec tile = getNodeTileN(n, p, tileindex, data);
1111                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
1112                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
1113
1114                         AtlasPointer ap = tile.texture;
1115
1116                         u16 l = getInteriorLight(n, 0, data);
1117                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
1118
1119                         float d = (float)BS/64;
1120
1121                         char g=-1;
1122                         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])
1123                                 g=1; //Object is at a slope
1124
1125                         video::S3DVertex vertices[4] =
1126                         {
1127                                         video::S3DVertex(-BS/2,-BS/2+d,-BS/2, 0,0,0, c,
1128                                                         ap.x0(), ap.y1()),
1129                                         video::S3DVertex(BS/2,-BS/2+d,-BS/2, 0,0,0, c,
1130                                                         ap.x1(), ap.y1()),
1131                                         video::S3DVertex(BS/2,g*BS/2+d,BS/2, 0,0,0, c,
1132                                                         ap.x1(), ap.y0()),
1133                                         video::S3DVertex(-BS/2,g*BS/2+d,BS/2, 0,0,0, c,
1134                                                         ap.x0(), ap.y0()),
1135                         };
1136
1137                         for(s32 i=0; i<4; i++)
1138                         {
1139                                 if(angle != 0)
1140                                         vertices[i].Pos.rotateXZBy(angle);
1141                                 vertices[i].Pos += intToFloat(p, BS);
1142                         }
1143
1144                         u16 indices[] = {0,1,2,2,3,0};
1145                         collector.append(tile, vertices, 4, indices, 6);
1146                 break;}
1147                 case NDT_NODEBOX:
1148                 {
1149                         static const v3s16 tile_dirs[6] = {
1150                                 v3s16(0, 1, 0),
1151                                 v3s16(0, -1, 0),
1152                                 v3s16(1, 0, 0),
1153                                 v3s16(-1, 0, 0),
1154                                 v3s16(0, 0, 1),
1155                                 v3s16(0, 0, -1)
1156                         };
1157
1158                         TileSpec tiles[6];
1159                         for(int i = 0; i < 6; i++)
1160                         {
1161                                 // Handles facedir rotation for textures
1162                                 tiles[i] = getNodeTile(n, p, tile_dirs[i], data);
1163                         }
1164
1165                         u16 l = getInteriorLight(n, 0, data);
1166                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
1167
1168                         v3f pos = intToFloat(p, BS);
1169
1170                         std::vector<aabb3f> boxes = n.getNodeBoxes(nodedef);
1171                         for(std::vector<aabb3f>::iterator
1172                                         i = boxes.begin();
1173                                         i != boxes.end(); i++)
1174                         {
1175                                 aabb3f box = *i;
1176                                 box.MinEdge += pos;
1177                                 box.MaxEdge += pos;
1178
1179                                 // Compute texture coords
1180                                 f32 tx1 = (i->MinEdge.X/BS)+0.5;
1181                                 f32 ty1 = (i->MinEdge.Y/BS)+0.5;
1182                                 f32 tz1 = (i->MinEdge.Z/BS)+0.5;
1183                                 f32 tx2 = (i->MaxEdge.X/BS)+0.5;
1184                                 f32 ty2 = (i->MaxEdge.Y/BS)+0.5;
1185                                 f32 tz2 = (i->MaxEdge.Z/BS)+0.5;
1186                                 f32 txc[24] = {
1187                                         // up
1188                                         tx1, 1-tz2, tx2, 1-tz1,
1189                                         // down
1190                                         tx1, tz1, tx2, tz2,
1191                                         // right
1192                                         tz1, 1-ty2, tz2, 1-ty1,
1193                                         // left
1194                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
1195                                         // back
1196                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
1197                                         // front
1198                                         tx1, 1-ty2, tx2, 1-ty1,
1199                                 };
1200
1201                                 makeCuboid(&collector, box, tiles, 6, c, txc);
1202                         }
1203                 break;}
1204                 }
1205         }
1206 }
1207