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         v2f t;
 103         for(int i = 0; i < tilecount; i++)
 104                                 {
 105                                 switch (tiles[i].rotation)
 106                                 {
 107                                 case 0:
 108                                         break;
 109                                 case 1: //R90
 110                                         for (int x = 0; x < 4; x++)
 111                                                 vertices[i*4+x].TCoords.rotateBy(90,irr::core::vector2df(0, 0));
 112                                         break;
 113                                 case 2: //R180
 114                                         for (int x = 0; x < 4; x++)
 115                                                 vertices[i*4+x].TCoords.rotateBy(180,irr::core::vector2df(0, 0));
 116                                         break;
 117                                 case 3: //R270
 118                                         for (int x = 0; x < 4; x++)
 119                                                 vertices[i*4+x].TCoords.rotateBy(270,irr::core::vector2df(0, 0));
 120                                         break;
 121                                 case 4: //FXR90
 122                                         for (int x = 0; x < 4; x++)
 123                                                 vertices[i*4+x].TCoords.rotateBy(90,irr::core::vector2df(0, 0));
 124
 125                                         tiles[i].texture.pos.Y += tiles[i].texture.size.Y;
 126                                         tiles[i].texture.size.Y *= -1;
 127                                         break;
 128                                 case 5: //FXR270
 129                                         for (int x = 0; x < 4; x++)
 130                                                 vertices[i*4+x].TCoords.rotateBy(270,irr::core::vector2df(0, 0));
 131                                         t=vertices[i*4].TCoords;
 132                                         tiles[i].texture.pos.Y += tiles[i].texture.size.Y;
 133                                         tiles[i].texture.size.Y *= -1;
 134                                         break;
 135                                 case 6: //FYR90
 136                                         for (int x = 0; x < 4; x++)
 137                                                 vertices[i*4+x].TCoords.rotateBy(90,irr::core::vector2df(0, 0));
 138                                         tiles[i].texture.pos.X += tiles[i].texture.size.X;
 139                                         tiles[i].texture.size.X *= -1;
 140                                         break;
 141                                 case 7: //FYR270
 142                                         for (int x = 0; x < 4; x++)
 143                                                 vertices[i*4+x].TCoords.rotateBy(270,irr::core::vector2df(0, 0));
 144                                         tiles[i].texture.pos.X += tiles[i].texture.size.X;
 145                                         tiles[i].texture.size.X *= -1;
 146                                         break;
 147                                 case 8: //FX
 148                                         tiles[i].texture.pos.Y += tiles[i].texture.size.Y;
 149                                         tiles[i].texture.size.Y *= -1;
 150                                         break;
 151                                 case 9: //FY
 152                                         tiles[i].texture.pos.X += tiles[i].texture.size.X;
 153                                         tiles[i].texture.size.X *= -1;
 154                                         break;
 155                                 default:
 156                                         break;
 157                                 }
 158                         }
 159                 for(s32 j=0; j<24; j++)
 160         {
 161                 int tileindex = MYMIN(j/4, tilecount-1);
 162                 vertices[j].TCoords *= tiles[tileindex].texture.size;
 163                 vertices[j].TCoords += tiles[tileindex].texture.pos;
 164         }
 165         u16 indices[] = {0,1,2,2,3,0};
 166         // Add to mesh collector
 167         for(s32 j=0; j<24; j+=4)
 168         {
 169                 int tileindex = MYMIN(j/4, tilecount-1);
 170                 collector->append(tiles[tileindex],
 171                                 vertices+j, 4, indices, 6);
 172         }
 173 }
 174
 175 void mapblock_mesh_generate_special(MeshMakeData *data,
 176                 MeshCollector &collector)
 177 {
 178         INodeDefManager *nodedef = data->m_gamedef->ndef();
 179
 180         // 0ms
 181         //TimeTaker timer("mapblock_mesh_generate_special()");
 182
 183         /*
 184                 Some settings
 185         */
 186         bool new_style_water = g_settings->getBool("new_style_water");
 187
 188         float node_liquid_level = 1.0;
 189         if(new_style_water)
 190                 node_liquid_level = 0.85;
 191
 192         v3s16 blockpos_nodes = data->m_blockpos*MAP_BLOCKSIZE;
 193
 194         for(s16 z=0; z<MAP_BLOCKSIZE; z++)
 195         for(s16 y=0; y<MAP_BLOCKSIZE; y++)
 196         for(s16 x=0; x<MAP_BLOCKSIZE; x++)
 197         {
 198                 v3s16 p(x,y,z);
 199
 200                 MapNode n = data->m_vmanip.getNodeNoEx(blockpos_nodes+p);
 201                 const ContentFeatures &f = nodedef->get(n);
 202
 203                 // Only solidness=0 stuff is drawn here
 204                 if(f.solidness != 0)
 205                         continue;
 206
 207                 switch(f.drawtype){
 208                 default:
 209                         infostream<<"Got "<<f.drawtype<<std::endl;
 210                         assert(0);
 211                         break;
 212                 case NDT_AIRLIKE:
 213                         break;
 214                 case NDT_LIQUID:
 215                 {
 216                         /*
 217                                 Add water sources to mesh if using new style
 218                         */
 219                         TileSpec tile_liquid = f.special_tiles[0];
 220                         TileSpec tile_liquid_bfculled = getNodeTile(n, p, v3s16(0,0,0), data);
 221                         AtlasPointer &pa_liquid = tile_liquid.texture;
 222
 223                         bool top_is_same_liquid = false;
 224                         MapNode ntop = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y+1,z));
 225                         content_t c_flowing = nodedef->getId(f.liquid_alternative_flowing);
 226                         content_t c_source = nodedef->getId(f.liquid_alternative_source);
 227                         if(ntop.getContent() == c_flowing || ntop.getContent() == c_source)
 228                                 top_is_same_liquid = true;
 229
 230                         u16 l = getInteriorLight(n, 0, data);
 231                         video::SColor c = MapBlock_LightColor(f.alpha, l, decode_light(f.light_source));
 232
 233                         /*
 234                                 Generate sides
 235                          */
 236                         v3s16 side_dirs[4] = {
 237                                 v3s16(1,0,0),
 238                                 v3s16(-1,0,0),
 239                                 v3s16(0,0,1),
 240                                 v3s16(0,0,-1),
 241                         };
 242                         for(u32 i=0; i<4; i++)
 243                         {
 244                                 v3s16 dir = side_dirs[i];
 245
 246                                 MapNode neighbor = data->m_vmanip.getNodeNoEx(blockpos_nodes + p + dir);
 247                                 content_t neighbor_content = neighbor.getContent();
 248                                 const ContentFeatures &n_feat = nodedef->get(neighbor_content);
 249                                 MapNode n_top = data->m_vmanip.getNodeNoEx(blockpos_nodes + p + dir+ v3s16(0,1,0));
 250                                 content_t n_top_c = n_top.getContent();
 251
 252                                 if(neighbor_content == CONTENT_IGNORE)
 253                                         continue;
 254
 255                                 /*
 256                                         If our topside is liquid and neighbor's topside
 257                                         is liquid, don't draw side face
 258                                 */
 259                                 if(top_is_same_liquid && (n_top_c == c_flowing ||
 260                                                 n_top_c == c_source || n_top_c == CONTENT_IGNORE))
 261                                         continue;
 262
 263                                 // Don't draw face if neighbor is blocking the view
 264                                 if(n_feat.solidness == 2)
 265                                         continue;
 266
 267                                 bool neighbor_is_same_liquid = (neighbor_content == c_source
 268                                                 || neighbor_content == c_flowing);
 269
 270                                 // Don't draw any faces if neighbor same is liquid and top is
 271                                 // same liquid
 272                                 if(neighbor_is_same_liquid && !top_is_same_liquid)
 273                                         continue;
 274
 275                                 // Use backface culled material if neighbor doesn't have a
 276                                 // solidness of 0
 277                                 const TileSpec *current_tile = &tile_liquid;
 278                                 if(n_feat.solidness != 0 || n_feat.visual_solidness != 0)
 279                                         current_tile = &tile_liquid_bfculled;
 280
 281                                 video::S3DVertex vertices[4] =
 282                                 {
 283                                         video::S3DVertex(-BS/2,0,BS/2,0,0,0, c,
 284                                                         pa_liquid.x0(), pa_liquid.y1()),
 285                                         video::S3DVertex(BS/2,0,BS/2,0,0,0, c,
 286                                                         pa_liquid.x1(), pa_liquid.y1()),
 287                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c,
 288                                                         pa_liquid.x1(), pa_liquid.y0()),
 289                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c,
 290                                                         pa_liquid.x0(), pa_liquid.y0()),
 291                                 };
 292
 293                                 /*
 294                                         If our topside is liquid, set upper border of face
 295                                         at upper border of node
 296                                 */
 297                                 if(top_is_same_liquid)
 298                                 {
 299                                         vertices[2].Pos.Y = 0.5*BS;
 300                                         vertices[3].Pos.Y = 0.5*BS;
 301                                 }
 302                                 /*
 303                                         Otherwise upper position of face is liquid level
 304                                 */
 305                                 else
 306                                 {
 307                                         vertices[2].Pos.Y = (node_liquid_level-0.5)*BS;
 308                                         vertices[3].Pos.Y = (node_liquid_level-0.5)*BS;
 309                                 }
 310                                 /*
 311                                         If neighbor is liquid, lower border of face is liquid level
 312                                 */
 313                                 if(neighbor_is_same_liquid)
 314                                 {
 315                                         vertices[0].Pos.Y = (node_liquid_level-0.5)*BS;
 316                                         vertices[1].Pos.Y = (node_liquid_level-0.5)*BS;
 317                                 }
 318                                 /*
 319                                         If neighbor is not liquid, lower border of face is
 320                                         lower border of node
 321                                 */
 322                                 else
 323                                 {
 324                                         vertices[0].Pos.Y = -0.5*BS;
 325                                         vertices[1].Pos.Y = -0.5*BS;
 326                                 }
 327
 328                                 for(s32 j=0; j<4; j++)
 329                                 {
 330                                         if(dir == v3s16(0,0,1))
 331                                                 vertices[j].Pos.rotateXZBy(0);
 332                                         if(dir == v3s16(0,0,-1))
 333                                                 vertices[j].Pos.rotateXZBy(180);
 334                                         if(dir == v3s16(-1,0,0))
 335                                                 vertices[j].Pos.rotateXZBy(90);
 336                                         if(dir == v3s16(1,0,-0))
 337                                                 vertices[j].Pos.rotateXZBy(-90);
 338
 339                                         // Do this to not cause glitches when two liquids are
 340                                         // side-by-side
 341                                         /*if(neighbor_is_same_liquid == false){
 342                                                 vertices[j].Pos.X *= 0.98;
 343                                                 vertices[j].Pos.Z *= 0.98;
 344                                         }*/
 345
 346                                         vertices[j].Pos += intToFloat(p, BS);
 347                                 }
 348
 349                                 u16 indices[] = {0,1,2,2,3,0};
 350                                 // Add to mesh collector
 351                                 collector.append(*current_tile, vertices, 4, indices, 6);
 352                         }
 353
 354                         /*
 355                                 Generate top
 356                          */
 357                         if(top_is_same_liquid)
 358                                 continue;
 359
 360                         video::S3DVertex vertices[4] =
 361                         {
 362                                 video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c,
 363                                                 pa_liquid.x0(), pa_liquid.y1()),
 364                                 video::S3DVertex(BS/2,0,BS/2, 0,0,0, c,
 365                                                 pa_liquid.x1(), pa_liquid.y1()),
 366                                 video::S3DVertex(BS/2,0,-BS/2, 0,0,0, c,
 367                                                 pa_liquid.x1(), pa_liquid.y0()),
 368                                 video::S3DVertex(-BS/2,0,-BS/2, 0,0,0, c,
 369                                                 pa_liquid.x0(), pa_liquid.y0()),
 370                         };
 371
 372                         v3f offset(p.X*BS, p.Y*BS + (-0.5+node_liquid_level)*BS, p.Z*BS);
 373                         for(s32 i=0; i<4; i++)
 374                         {
 375                                 vertices[i].Pos += offset;
 376                         }
 377
 378                         u16 indices[] = {0,1,2,2,3,0};
 379                         // Add to mesh collector
 380                         collector.append(tile_liquid, vertices, 4, indices, 6);
 381                 break;}
 382                 case NDT_FLOWINGLIQUID:
 383                 {
 384                         /*
 385                                 Add flowing liquid to mesh
 386                         */
 387                         TileSpec tile_liquid = f.special_tiles[0];
 388                         TileSpec tile_liquid_bfculled = f.special_tiles[1];
 389                         AtlasPointer &pa_liquid = tile_liquid.texture;
 390
 391                         bool top_is_same_liquid = false;
 392                         MapNode ntop = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y+1,z));
 393                         content_t c_flowing = nodedef->getId(f.liquid_alternative_flowing);
 394                         content_t c_source = nodedef->getId(f.liquid_alternative_source);
 395                         if(ntop.getContent() == c_flowing || ntop.getContent() == c_source)
 396                                 top_is_same_liquid = true;
 397
 398                         u16 l = 0;
 399                         // If this liquid emits light and doesn't contain light, draw
 400                         // it at what it emits, for an increased effect
 401                         u8 light_source = nodedef->get(n).light_source;
 402                         if(light_source != 0){
 403                                 //l = decode_light(undiminish_light(light_source));
 404                                 l = decode_light(light_source);
 405                                 l = l | (l<<8);
 406                         }
 407                         // Use the light of the node on top if possible
 408                         else if(nodedef->get(ntop).param_type == CPT_LIGHT)
 409                                 l = getInteriorLight(ntop, 0, data);
 410                         // Otherwise use the light of this node (the liquid)
 411                         else
 412                                 l = getInteriorLight(n, 0, data);
 413                         video::SColor c = MapBlock_LightColor(f.alpha, l, decode_light(f.light_source));
 414
 415                         // Neighbor liquid levels (key = relative position)
 416                         // Includes current node
 417                         std::map<v3s16, f32> neighbor_levels;
 418                         std::map<v3s16, content_t> neighbor_contents;
 419                         std::map<v3s16, u8> neighbor_flags;
 420                         const u8 neighborflag_top_is_same_liquid = 0x01;
 421                         v3s16 neighbor_dirs[9] = {
 422                                 v3s16(0,0,0),
 423                                 v3s16(0,0,1),
 424                                 v3s16(0,0,-1),
 425                                 v3s16(1,0,0),
 426                                 v3s16(-1,0,0),
 427                                 v3s16(1,0,1),
 428                                 v3s16(-1,0,-1),
 429                                 v3s16(1,0,-1),
 430                                 v3s16(-1,0,1),
 431                         };
 432                         for(u32 i=0; i<9; i++)
 433                         {
 434                                 content_t content = CONTENT_AIR;
 435                                 float level = -0.5 * BS;
 436                                 u8 flags = 0;
 437                                 // Check neighbor
 438                                 v3s16 p2 = p + neighbor_dirs[i];
 439                                 MapNode n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
 440                                 if(n2.getContent() != CONTENT_IGNORE)
 441                                 {
 442                                         content = n2.getContent();
 443
 444                                         if(n2.getContent() == c_source)
 445                                                 level = (-0.5+node_liquid_level) * BS;
 446                                         else if(n2.getContent() == c_flowing)
 447                                                 level = (-0.5 + ((float)(n2.param2&LIQUID_LEVEL_MASK)
 448                                                                 + 0.5) / (float)LIQUID_LEVEL_SOURCE * node_liquid_level) * BS;
 449
 450                                         // Check node above neighbor.
 451                                         // NOTE: This doesn't get executed if neighbor
 452                                         //       doesn't exist
 453                                         p2.Y += 1;
 454                                         n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
 455                                         if(n2.getContent() == c_source ||
 456                                                         n2.getContent() == c_flowing)
 457                                                 flags |= neighborflag_top_is_same_liquid;
 458                                 }
 459
 460                                 neighbor_levels[neighbor_dirs[i]] = level;
 461                                 neighbor_contents[neighbor_dirs[i]] = content;
 462                                 neighbor_flags[neighbor_dirs[i]] = flags;
 463                         }
 464
 465                         // Corner heights (average between four liquids)
 466                         f32 corner_levels[4];
 467
 468                         v3s16 halfdirs[4] = {
 469                                 v3s16(0,0,0),
 470                                 v3s16(1,0,0),
 471                                 v3s16(1,0,1),
 472                                 v3s16(0,0,1),
 473                         };
 474                         for(u32 i=0; i<4; i++)
 475                         {
 476                                 v3s16 cornerdir = halfdirs[i];
 477                                 float cornerlevel = 0;
 478                                 u32 valid_count = 0;
 479                                 u32 air_count = 0;
 480                                 for(u32 j=0; j<4; j++)
 481                                 {
 482                                         v3s16 neighbordir = cornerdir - halfdirs[j];
 483                                         content_t content = neighbor_contents[neighbordir];
 484                                         // If top is liquid, draw starting from top of node
 485                                         if(neighbor_flags[neighbordir] &
 486                                                         neighborflag_top_is_same_liquid)
 487                                         {
 488                                                 cornerlevel = 0.5*BS;
 489                                                 valid_count = 1;
 490                                                 break;
 491                                         }
 492                                         // Source is always the same height
 493                                         else if(content == c_source)
 494                                         {
 495                                                 cornerlevel = (-0.5+node_liquid_level)*BS;
 496                                                 valid_count = 1;
 497                                                 break;
 498                                         }
 499                                         // Flowing liquid has level information
 500                                         else if(content == c_flowing)
 501                                         {
 502                                                 cornerlevel += neighbor_levels[neighbordir];
 503                                                 valid_count++;
 504                                         }
 505                                         else if(content == CONTENT_AIR)
 506                                         {
 507                                                 air_count++;
 508                                         }
 509                                 }
 510                                 if(air_count >= 2)
 511                                         cornerlevel = -0.5*BS+0.2;
 512                                 else if(valid_count > 0)
 513                                         cornerlevel /= valid_count;
 514                                 corner_levels[i] = cornerlevel;
 515                         }
 516
 517                         /*
 518                                 Generate sides
 519                         */
 520
 521                         v3s16 side_dirs[4] = {
 522                                 v3s16(1,0,0),
 523                                 v3s16(-1,0,0),
 524                                 v3s16(0,0,1),
 525                                 v3s16(0,0,-1),
 526                         };
 527                         s16 side_corners[4][2] = {
 528                                 {1, 2},
 529                                 {3, 0},
 530                                 {2, 3},
 531                                 {0, 1},
 532                         };
 533                         for(u32 i=0; i<4; i++)
 534                         {
 535                                 v3s16 dir = side_dirs[i];
 536
 537                                 /*
 538                                         If our topside is liquid and neighbor's topside
 539                                         is liquid, don't draw side face
 540                                 */
 541                                 if(top_is_same_liquid &&
 542                                                 neighbor_flags[dir] & neighborflag_top_is_same_liquid)
 543                                         continue;
 544
 545                                 content_t neighbor_content = neighbor_contents[dir];
 546                                 const ContentFeatures &n_feat = nodedef->get(neighbor_content);
 547
 548                                 // Don't draw face if neighbor is blocking the view
 549                                 if(n_feat.solidness == 2)
 550                                         continue;
 551
 552                                 bool neighbor_is_same_liquid = (neighbor_content == c_source
 553                                                 || neighbor_content == c_flowing);
 554
 555                                 // Don't draw any faces if neighbor same is liquid and top is
 556                                 // same liquid
 557                                 if(neighbor_is_same_liquid == true
 558                                                 && top_is_same_liquid == false)
 559                                         continue;
 560
 561                                 // Use backface culled material if neighbor doesn't have a
 562                                 // solidness of 0
 563                                 const TileSpec *current_tile = &tile_liquid;
 564                                 if(n_feat.solidness != 0 || n_feat.visual_solidness != 0)
 565                                         current_tile = &tile_liquid_bfculled;
 566
 567                                 video::S3DVertex vertices[4] =
 568                                 {
 569                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c,
 570                                                         pa_liquid.x0(), pa_liquid.y1()),
 571                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c,
 572                                                         pa_liquid.x1(), pa_liquid.y1()),
 573                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c,
 574                                                         pa_liquid.x1(), pa_liquid.y0()),
 575                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c,
 576                                                         pa_liquid.x0(), pa_liquid.y0()),
 577                                 };
 578
 579                                 /*
 580                                         If our topside is liquid, set upper border of face
 581                                         at upper border of node
 582                                 */
 583                                 if(top_is_same_liquid)
 584                                 {
 585                                         vertices[2].Pos.Y = 0.5*BS;
 586                                         vertices[3].Pos.Y = 0.5*BS;
 587                                 }
 588                                 /*
 589                                         Otherwise upper position of face is corner levels
 590                                 */
 591                                 else
 592                                 {
 593                                         vertices[2].Pos.Y = corner_levels[side_corners[i][0]];
 594                                         vertices[3].Pos.Y = corner_levels[side_corners[i][1]];
 595                                 }
 596
 597                                 /*
 598                                         If neighbor is liquid, lower border of face is corner
 599                                         liquid levels
 600                                 */
 601                                 if(neighbor_is_same_liquid)
 602                                 {
 603                                         vertices[0].Pos.Y = corner_levels[side_corners[i][1]];
 604                                         vertices[1].Pos.Y = corner_levels[side_corners[i][0]];
 605                                 }
 606                                 /*
 607                                         If neighbor is not liquid, lower border of face is
 608                                         lower border of node
 609                                 */
 610                                 else
 611                                 {
 612                                         vertices[0].Pos.Y = -0.5*BS;
 613                                         vertices[1].Pos.Y = -0.5*BS;
 614                                 }
 615
 616                                 for(s32 j=0; j<4; j++)
 617                                 {
 618                                         if(dir == v3s16(0,0,1))
 619                                                 vertices[j].Pos.rotateXZBy(0);
 620                                         if(dir == v3s16(0,0,-1))
 621                                                 vertices[j].Pos.rotateXZBy(180);
 622                                         if(dir == v3s16(-1,0,0))
 623                                                 vertices[j].Pos.rotateXZBy(90);
 624                                         if(dir == v3s16(1,0,-0))
 625                                                 vertices[j].Pos.rotateXZBy(-90);
 626
 627                                         // Do this to not cause glitches when two liquids are
 628                                         // side-by-side
 629                                         /*if(neighbor_is_same_liquid == false){
 630                                                 vertices[j].Pos.X *= 0.98;
 631                                                 vertices[j].Pos.Z *= 0.98;
 632                                         }*/
 633
 634                                         vertices[j].Pos += intToFloat(p, BS);
 635                                 }
 636
 637                                 u16 indices[] = {0,1,2,2,3,0};
 638                                 // Add to mesh collector
 639                                 collector.append(*current_tile, vertices, 4, indices, 6);
 640                         }
 641
 642                         /*
 643                                 Generate top side, if appropriate
 644                         */
 645
 646                         if(top_is_same_liquid == false)
 647                         {
 648                                 video::S3DVertex vertices[4] =
 649                                 {
 650                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c,
 651                                                         pa_liquid.x0(), pa_liquid.y1()),
 652                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c,
 653                                                         pa_liquid.x1(), pa_liquid.y1()),
 654                                         video::S3DVertex(BS/2,0,-BS/2, 0,0,0, c,
 655                                                         pa_liquid.x1(), pa_liquid.y0()),
 656                                         video::S3DVertex(-BS/2,0,-BS/2, 0,0,0, c,
 657                                                         pa_liquid.x0(), pa_liquid.y0()),
 658                                 };
 659
 660                                 // To get backface culling right, the vertices need to go
 661                                 // clockwise around the front of the face. And we happened to
 662                                 // calculate corner levels in exact reverse order.
 663                                 s32 corner_resolve[4] = {3,2,1,0};
 664
 665                                 for(s32 i=0; i<4; i++)
 666                                 {
 667                                         //vertices[i].Pos.Y += liquid_level;
 668                                         //vertices[i].Pos.Y += neighbor_levels[v3s16(0,0,0)];
 669                                         s32 j = corner_resolve[i];
 670                                         vertices[i].Pos.Y += corner_levels[j];
 671                                         vertices[i].Pos += intToFloat(p, BS);
 672                                 }
 673
 674                                 // Default downwards-flowing texture animation goes from
 675                                 // -Z towards +Z, thus the direction is +Z.
 676                                 // Rotate texture to make animation go in flow direction
 677                                 // Positive if liquid moves towards +Z
 678                                 int dz = (corner_levels[side_corners[3][0]] +
 679                                                 corner_levels[side_corners[3][1]]) -
 680                                                 (corner_levels[side_corners[2][0]] +
 681                                                 corner_levels[side_corners[2][1]]);
 682                                 // Positive if liquid moves towards +X
 683                                 int dx = (corner_levels[side_corners[1][0]] +
 684                                                 corner_levels[side_corners[1][1]]) -
 685                                                 (corner_levels[side_corners[0][0]] +
 686                                                 corner_levels[side_corners[0][1]]);
 687                                 // -X
 688                                 if(-dx >= abs(dz))
 689                                 {
 690                                         v2f t = vertices[0].TCoords;
 691                                         vertices[0].TCoords = vertices[1].TCoords;
 692                                         vertices[1].TCoords = vertices[2].TCoords;
 693                                         vertices[2].TCoords = vertices[3].TCoords;
 694                                         vertices[3].TCoords = t;
 695                                 }
 696                                 // +X
 697                                 if(dx >= abs(dz))
 698                                 {
 699                                         v2f t = vertices[0].TCoords;
 700                                         vertices[0].TCoords = vertices[3].TCoords;
 701                                         vertices[3].TCoords = vertices[2].TCoords;
 702                                         vertices[2].TCoords = vertices[1].TCoords;
 703                                         vertices[1].TCoords = t;
 704                                 }
 705                                 // -Z
 706                                 if(-dz >= abs(dx))
 707                                 {
 708                                         v2f t = vertices[0].TCoords;
 709                                         vertices[0].TCoords = vertices[3].TCoords;
 710                                         vertices[3].TCoords = vertices[2].TCoords;
 711                                         vertices[2].TCoords = vertices[1].TCoords;
 712                                         vertices[1].TCoords = t;
 713                                         t = vertices[0].TCoords;
 714                                         vertices[0].TCoords = vertices[3].TCoords;
 715                                         vertices[3].TCoords = vertices[2].TCoords;
 716                                         vertices[2].TCoords = vertices[1].TCoords;
 717                                         vertices[1].TCoords = t;
 718                                 }
 719
 720                                 u16 indices[] = {0,1,2,2,3,0};
 721                                 // Add to mesh collector
 722                                 collector.append(tile_liquid, vertices, 4, indices, 6);
 723                         }
 724                 break;}
 725                 case NDT_GLASSLIKE:
 726                 {
 727                         TileSpec tile = getNodeTile(n, p, v3s16(0,0,0), data);
 728                         AtlasPointer ap = tile.texture;
 729
 730                         u16 l = getInteriorLight(n, 1, data);
 731                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 732
 733                         for(u32 j=0; j<6; j++)
 734                         {
 735                                 // Check this neighbor
 736                                 v3s16 n2p = blockpos_nodes + p + g_6dirs[j];
 737                                 MapNode n2 = data->m_vmanip.getNodeNoEx(n2p);
 738                                 // Don't make face if neighbor is of same type
 739                                 if(n2.getContent() == n.getContent())
 740                                         continue;
 741
 742                                 // The face at Z+
 743                                 video::S3DVertex vertices[4] =
 744                                 {
 745                                         video::S3DVertex(-BS/2,-BS/2,BS/2, 0,0,0, c,
 746                                                 ap.x0(), ap.y1()),
 747                                         video::S3DVertex(BS/2,-BS/2,BS/2, 0,0,0, c,
 748                                                 ap.x1(), ap.y1()),
 749                                         video::S3DVertex(BS/2,BS/2,BS/2, 0,0,0, c,
 750                                                 ap.x1(), ap.y0()),
 751                                         video::S3DVertex(-BS/2,BS/2,BS/2, 0,0,0, c,
 752                                                 ap.x0(), ap.y0()),
 753                                 };
 754
 755                                 // Rotations in the g_6dirs format
 756                                 if(j == 0) // Z+
 757                                         for(u16 i=0; i<4; i++)
 758                                                 vertices[i].Pos.rotateXZBy(0);
 759                                 else if(j == 1) // Y+
 760                                         for(u16 i=0; i<4; i++)
 761                                                 vertices[i].Pos.rotateYZBy(-90);
 762                                 else if(j == 2) // X+
 763                                         for(u16 i=0; i<4; i++)
 764                                                 vertices[i].Pos.rotateXZBy(-90);
 765                                 else if(j == 3) // Z-
 766                                         for(u16 i=0; i<4; i++)
 767                                                 vertices[i].Pos.rotateXZBy(180);
 768                                 else if(j == 4) // Y-
 769                                         for(u16 i=0; i<4; i++)
 770                                                 vertices[i].Pos.rotateYZBy(90);
 771                                 else if(j == 5) // X-
 772                                         for(u16 i=0; i<4; i++)
 773                                                 vertices[i].Pos.rotateXZBy(90);
 774
 775                                 for(u16 i=0; i<4; i++){
 776                                         vertices[i].Pos += intToFloat(p, BS);
 777                                 }
 778
 779                                 u16 indices[] = {0,1,2,2,3,0};
 780                                 // Add to mesh collector
 781                                 collector.append(tile, vertices, 4, indices, 6);
 782                         }
 783                 break;}
 784                 case NDT_ALLFACES:
 785                 {
 786                         TileSpec tile_leaves = getNodeTile(n, p,
 787                                         v3s16(0,0,0), data);
 788                         AtlasPointer pa_leaves = tile_leaves.texture;
 789
 790                         u16 l = getInteriorLight(n, 1, data);
 791                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 792
 793                         v3f pos = intToFloat(p, BS);
 794                         aabb3f box(-BS/2,-BS/2,-BS/2,BS/2,BS/2,BS/2);
 795                         box.MinEdge += pos;
 796                         box.MaxEdge += pos;
 797                         makeCuboid(&collector, box, &tile_leaves, 1, c, NULL);
 798                 break;}
 799                 case NDT_ALLFACES_OPTIONAL:
 800                         // This is always pre-converted to something else
 801                         assert(0);
 802                         break;
 803                 case NDT_TORCHLIKE:
 804                 {
 805                         v3s16 dir = n.getWallMountedDir(nodedef);
 806
 807                         u8 tileindex = 0;
 808                         if(dir == v3s16(0,-1,0)){
 809                                 tileindex = 0; // floor
 810                         } else if(dir == v3s16(0,1,0)){
 811                                 tileindex = 1; // ceiling
 812                         // For backwards compatibility
 813                         } else if(dir == v3s16(0,0,0)){
 814                                 tileindex = 0; // floor
 815                         } else {
 816                                 tileindex = 2; // side
 817                         }
 818
 819                         TileSpec tile = getNodeTileN(n, p, tileindex, data);
 820                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
 821                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
 822
 823                         AtlasPointer ap = tile.texture;
 824
 825                         u16 l = getInteriorLight(n, 1, data);
 826                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 827
 828                         // Wall at X+ of node
 829                         video::S3DVertex vertices[4] =
 830                         {
 831                                 video::S3DVertex(-BS/2,-BS/2,0, 0,0,0, c,
 832                                                 ap.x0(), ap.y1()),
 833                                 video::S3DVertex(BS/2,-BS/2,0, 0,0,0, c,
 834                                                 ap.x1(), ap.y1()),
 835                                 video::S3DVertex(BS/2,BS/2,0, 0,0,0, c,
 836                                                 ap.x1(), ap.y0()),
 837                                 video::S3DVertex(-BS/2,BS/2,0, 0,0,0, c,
 838                                                 ap.x0(), ap.y0()),
 839                         };
 840
 841                         for(s32 i=0; i<4; i++)
 842                         {
 843                                 if(dir == v3s16(1,0,0))
 844                                         vertices[i].Pos.rotateXZBy(0);
 845                                 if(dir == v3s16(-1,0,0))
 846                                         vertices[i].Pos.rotateXZBy(180);
 847                                 if(dir == v3s16(0,0,1))
 848                                         vertices[i].Pos.rotateXZBy(90);
 849                                 if(dir == v3s16(0,0,-1))
 850                                         vertices[i].Pos.rotateXZBy(-90);
 851                                 if(dir == v3s16(0,-1,0))
 852                                         vertices[i].Pos.rotateXZBy(45);
 853                                 if(dir == v3s16(0,1,0))
 854                                         vertices[i].Pos.rotateXZBy(-45);
 855
 856                                 vertices[i].Pos += intToFloat(p, BS);
 857                         }
 858
 859                         u16 indices[] = {0,1,2,2,3,0};
 860                         // Add to mesh collector
 861                         collector.append(tile, vertices, 4, indices, 6);
 862                 break;}
 863                 case NDT_SIGNLIKE:
 864                 {
 865                         TileSpec tile = getNodeTileN(n, p, 0, data);
 866                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
 867                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
 868                         AtlasPointer ap = tile.texture;
 869
 870                         u16 l = getInteriorLight(n, 0, data);
 871                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 872
 873                         float d = (float)BS/16;
 874                         // Wall at X+ of node
 875                         video::S3DVertex vertices[4] =
 876                         {
 877                                 video::S3DVertex(BS/2-d,BS/2,BS/2, 0,0,0, c,
 878                                                 ap.x0(), ap.y0()),
 879                                 video::S3DVertex(BS/2-d,BS/2,-BS/2, 0,0,0, c,
 880                                                 ap.x1(), ap.y0()),
 881                                 video::S3DVertex(BS/2-d,-BS/2,-BS/2, 0,0,0, c,
 882                                                 ap.x1(), ap.y1()),
 883                                 video::S3DVertex(BS/2-d,-BS/2,BS/2, 0,0,0, c,
 884                                                 ap.x0(), ap.y1()),
 885                         };
 886
 887                         v3s16 dir = n.getWallMountedDir(nodedef);
 888
 889                         for(s32 i=0; i<4; i++)
 890                         {
 891                                 if(dir == v3s16(1,0,0))
 892                                         vertices[i].Pos.rotateXZBy(0);
 893                                 if(dir == v3s16(-1,0,0))
 894                                         vertices[i].Pos.rotateXZBy(180);
 895                                 if(dir == v3s16(0,0,1))
 896                                         vertices[i].Pos.rotateXZBy(90);
 897                                 if(dir == v3s16(0,0,-1))
 898                                         vertices[i].Pos.rotateXZBy(-90);
 899                                 if(dir == v3s16(0,-1,0))
 900                                         vertices[i].Pos.rotateXYBy(-90);
 901                                 if(dir == v3s16(0,1,0))
 902                                         vertices[i].Pos.rotateXYBy(90);
 903
 904                                 vertices[i].Pos += intToFloat(p, BS);
 905                         }
 906
 907                         u16 indices[] = {0,1,2,2,3,0};
 908                         // Add to mesh collector
 909                         collector.append(tile, vertices, 4, indices, 6);
 910                 break;}
 911                 case NDT_PLANTLIKE:
 912                 {
 913                         TileSpec tile = getNodeTileN(n, p, 0, data);
 914                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
 915                         AtlasPointer ap = tile.texture;
 916
 917                         u16 l = getInteriorLight(n, 1, data);
 918                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 919
 920                         for(u32 j=0; j<2; j++)
 921                         {
 922                                 video::S3DVertex vertices[4] =
 923                                 {
 924                                         video::S3DVertex(-BS/2*f.visual_scale,-BS/2,0, 0,0,0, c,
 925                                                 ap.x0(), ap.y1()),
 926                                         video::S3DVertex( BS/2*f.visual_scale,-BS/2,0, 0,0,0, c,
 927                                                 ap.x1(), ap.y1()),
 928                                         video::S3DVertex( BS/2*f.visual_scale,
 929                                                 -BS/2 + f.visual_scale*BS,0, 0,0,0, c,
 930                                                 ap.x1(), ap.y0()),
 931                                         video::S3DVertex(-BS/2*f.visual_scale,
 932                                                 -BS/2 + f.visual_scale*BS,0, 0,0,0, c,
 933                                                 ap.x0(), ap.y0()),
 934                                 };
 935
 936                                 if(j == 0)
 937                                 {
 938                                         for(u16 i=0; i<4; i++)
 939                                                 vertices[i].Pos.rotateXZBy(45);
 940                                 }
 941                                 else if(j == 1)
 942                                 {
 943                                         for(u16 i=0; i<4; i++)
 944                                                 vertices[i].Pos.rotateXZBy(-45);
 945                                 }
 946
 947                                 for(u16 i=0; i<4; i++)
 948                                 {
 949                                         vertices[i].Pos *= f.visual_scale;
 950                                         vertices[i].Pos += intToFloat(p, BS);
 951                                 }
 952
 953                                 u16 indices[] = {0,1,2,2,3,0};
 954                                 // Add to mesh collector
 955                                 collector.append(tile, vertices, 4, indices, 6);
 956                         }
 957                 break;}
 958                 case NDT_FENCELIKE:
 959                 {
 960                         TileSpec tile = getNodeTile(n, p, v3s16(0,0,0), data);
 961                         TileSpec tile_nocrack = tile;
 962                         tile_nocrack.material_flags &= ~MATERIAL_FLAG_CRACK;
 963
 964                         // A hack to put wood the right way around in the posts
 965                         ITextureSource *tsrc = data->m_gamedef->tsrc();
 966                         TileSpec tile_rot = tile;
 967                         tile_rot.texture = tsrc->getTexture(tsrc->getTextureName(
 968                                         tile.texture.id) + "^[transformR90");
 969
 970                         u16 l = getInteriorLight(n, 1, data);
 971                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 972
 973                         const f32 post_rad=(f32)BS/8;
 974                         const f32 bar_rad=(f32)BS/16;
 975                         const f32 bar_len=(f32)(BS/2)-post_rad;
 976
 977                         v3f pos = intToFloat(p, BS);
 978
 979                         // The post - always present
 980                         aabb3f post(-post_rad,-BS/2,-post_rad,post_rad,BS/2,post_rad);
 981                         post.MinEdge += pos;
 982                         post.MaxEdge += pos;
 983                         f32 postuv[24]={
 984                                         6/16.,6/16.,10/16.,10/16.,
 985                                         6/16.,6/16.,10/16.,10/16.,
 986                                         0/16.,0,4/16.,1,
 987                                         4/16.,0,8/16.,1,
 988                                         8/16.,0,12/16.,1,
 989                                         12/16.,0,16/16.,1};
 990                         makeCuboid(&collector, post, &tile_rot, 1, c, postuv);
 991
 992                         // Now a section of fence, +X, if there's a post there
 993                         v3s16 p2 = p;
 994                         p2.X++;
 995                         MapNode n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
 996                         const ContentFeatures *f2 = &nodedef->get(n2);
 997                         if(f2->drawtype == NDT_FENCELIKE)
 998                         {
 999                                 aabb3f bar(-bar_len+BS/2,-bar_rad+BS/4,-bar_rad,
1000                                                 bar_len+BS/2,bar_rad+BS/4,bar_rad);
1001                                 bar.MinEdge += pos;
1002                                 bar.MaxEdge += pos;
1003                                 f32 xrailuv[24]={
1004                                         0/16.,2/16.,16/16.,4/16.,
1005                                         0/16.,4/16.,16/16.,6/16.,
1006                                         6/16.,6/16.,8/16.,8/16.,
1007                                         10/16.,10/16.,12/16.,12/16.,
1008                                         0/16.,8/16.,16/16.,10/16.,
1009                                         0/16.,14/16.,16/16.,16/16.};
1010                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1011                                                 c, xrailuv);
1012                                 bar.MinEdge.Y -= BS/2;
1013                                 bar.MaxEdge.Y -= BS/2;
1014                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1015                                                 c, xrailuv);
1016                         }
1017
1018                         // Now a section of fence, +Z, if there's a post there
1019                         p2 = p;
1020                         p2.Z++;
1021                         n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
1022                         f2 = &nodedef->get(n2);
1023                         if(f2->drawtype == NDT_FENCELIKE)
1024                         {
1025                                 aabb3f bar(-bar_rad,-bar_rad+BS/4,-bar_len+BS/2,
1026                                                 bar_rad,bar_rad+BS/4,bar_len+BS/2);
1027                                 bar.MinEdge += pos;
1028                                 bar.MaxEdge += pos;
1029                                 f32 zrailuv[24]={
1030                                         3/16.,1/16.,5/16.,5/16., // cannot rotate; stretch
1031                                         4/16.,1/16.,6/16.,5/16., // for wood texture instead
1032                                         0/16.,9/16.,16/16.,11/16.,
1033                                         0/16.,6/16.,16/16.,8/16.,
1034                                         6/16.,6/16.,8/16.,8/16.,
1035                                         10/16.,10/16.,12/16.,12/16.};
1036                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1037                                                 c, zrailuv);
1038                                 bar.MinEdge.Y -= BS/2;
1039                                 bar.MaxEdge.Y -= BS/2;
1040                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1041                                                 c, zrailuv);
1042                         }
1043                 break;}
1044                 case NDT_RAILLIKE:
1045                 {
1046                         bool is_rail_x [] = { false, false };  /* x-1, x+1 */
1047                         bool is_rail_z [] = { false, false };  /* z-1, z+1 */
1048
1049                         bool is_rail_z_minus_y [] = { false, false };  /* z-1, z+1; y-1 */
1050                         bool is_rail_x_minus_y [] = { false, false };  /* x-1, z+1; y-1 */
1051                         bool is_rail_z_plus_y [] = { false, false };  /* z-1, z+1; y+1 */
1052                         bool is_rail_x_plus_y [] = { false, false };  /* x-1, x+1; y+1 */
1053
1054                         MapNode n_minus_x = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1,y,z));
1055                         MapNode n_plus_x = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1,y,z));
1056                         MapNode n_minus_z = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y,z-1));
1057                         MapNode n_plus_z = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y,z+1));
1058                         MapNode n_plus_x_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1, y+1, z));
1059                         MapNode n_plus_x_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1, y-1, z));
1060                         MapNode n_minus_x_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1, y+1, z));
1061                         MapNode n_minus_x_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1, y-1, z));
1062                         MapNode n_plus_z_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y+1, z+1));
1063                         MapNode n_minus_z_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y+1, z-1));
1064                         MapNode n_plus_z_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y-1, z+1));
1065                         MapNode n_minus_z_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y-1, z-1));
1066
1067                         content_t thiscontent = n.getContent();
1068                         if(n_minus_x.getContent() == thiscontent)
1069                                 is_rail_x[0] = true;
1070                         if (n_minus_x_minus_y.getContent() == thiscontent)
1071                                 is_rail_x_minus_y[0] = true;
1072                         if(n_minus_x_plus_y.getContent() == thiscontent)
1073                                 is_rail_x_plus_y[0] = true;
1074
1075                         if(n_plus_x.getContent() == thiscontent)
1076                                 is_rail_x[1] = true;
1077                         if (n_plus_x_minus_y.getContent() == thiscontent)
1078                                 is_rail_x_minus_y[1] = true;
1079                         if(n_plus_x_plus_y.getContent() == thiscontent)
1080                                 is_rail_x_plus_y[1] = true;
1081
1082                         if(n_minus_z.getContent() == thiscontent)
1083                                 is_rail_z[0] = true;
1084                         if (n_minus_z_minus_y.getContent() == thiscontent)
1085                                 is_rail_z_minus_y[0] = true;
1086                         if(n_minus_z_plus_y.getContent() == thiscontent)
1087                                 is_rail_z_plus_y[0] = true;
1088
1089                         if(n_plus_z.getContent() == thiscontent)
1090                                 is_rail_z[1] = true;
1091                         if (n_plus_z_minus_y.getContent() == thiscontent)
1092                                 is_rail_z_minus_y[1] = true;
1093                         if(n_plus_z_plus_y.getContent() == thiscontent)
1094                                 is_rail_z_plus_y[1] = true;
1095
1096                         bool is_rail_x_all[] = {false, false};
1097                         bool is_rail_z_all[] = {false, false};
1098                         is_rail_x_all[0]=is_rail_x[0] || is_rail_x_minus_y[0] || is_rail_x_plus_y[0];
1099                         is_rail_x_all[1]=is_rail_x[1] || is_rail_x_minus_y[1] || is_rail_x_plus_y[1];
1100                         is_rail_z_all[0]=is_rail_z[0] || is_rail_z_minus_y[0] || is_rail_z_plus_y[0];
1101                         is_rail_z_all[1]=is_rail_z[1] || is_rail_z_minus_y[1] || is_rail_z_plus_y[1];
1102
1103                         // reasonable default, flat straight unrotated rail
1104                         bool is_straight = true;
1105                         int adjacencies = 0;
1106                         int angle = 0;
1107                         u8 tileindex = 0;
1108
1109                         // check for sloped rail
1110                         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])
1111                         {
1112                                 adjacencies = 5; //5 means sloped
1113                                 is_straight = true; // sloped is always straight
1114                         }
1115                         else
1116                         {
1117                                 // is really straight, rails on both sides
1118                                 is_straight = (is_rail_x_all[0] && is_rail_x_all[1]) || (is_rail_z_all[0] && is_rail_z_all[1]);
1119                                 adjacencies = is_rail_x_all[0] + is_rail_x_all[1] + is_rail_z_all[0] + is_rail_z_all[1];
1120                         }
1121
1122                         switch (adjacencies) {
1123                         case 1:
1124                                 if(is_rail_x_all[0] || is_rail_x_all[1])
1125                                         angle = 90;
1126                                 break;
1127                         case 2:
1128                                 if(!is_straight)
1129                                         tileindex = 1; // curved
1130                                 if(is_rail_x_all[0] && is_rail_x_all[1])
1131                                         angle = 90;
1132                                 if(is_rail_z_all[0] && is_rail_z_all[1]){
1133                                         if (n_minus_z_plus_y.getContent() == thiscontent) angle = 180;
1134                                 }
1135                                 else if(is_rail_x_all[0] && is_rail_z_all[0])
1136                                         angle = 270;
1137                                 else if(is_rail_x_all[0] && is_rail_z_all[1])
1138                                         angle = 180;
1139                                 else if(is_rail_x_all[1] && is_rail_z_all[1])
1140                                         angle = 90;
1141                                 break;
1142                         case 3:
1143                                 // here is where the potential to 'switch' a junction is, but not implemented at present
1144                                 tileindex = 2; // t-junction
1145                                 if(!is_rail_x_all[1])
1146                                         angle=180;
1147                                 if(!is_rail_z_all[0])
1148                                         angle=90;
1149                                 if(!is_rail_z_all[1])
1150                                         angle=270;
1151                                 break;
1152                         case 4:
1153                                 tileindex = 3; // crossing
1154                                 break;
1155                         case 5: //sloped
1156                                 if(is_rail_z_plus_y[0])
1157                                         angle = 180;
1158                                 if(is_rail_x_plus_y[0])
1159                                         angle = 90;
1160                                 if(is_rail_x_plus_y[1])
1161                                         angle = -90;
1162                                 break;
1163                         default:
1164                                 break;
1165                         }
1166
1167                         TileSpec tile = getNodeTileN(n, p, tileindex, data);
1168                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
1169                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
1170
1171                         AtlasPointer ap = tile.texture;
1172
1173                         u16 l = getInteriorLight(n, 0, data);
1174                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
1175
1176                         float d = (float)BS/64;
1177
1178                         char g=-1;
1179                         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])
1180                                 g=1; //Object is at a slope
1181
1182                         video::S3DVertex vertices[4] =
1183                         {
1184                                         video::S3DVertex(-BS/2,-BS/2+d,-BS/2, 0,0,0, c,
1185                                                         ap.x0(), ap.y1()),
1186                                         video::S3DVertex(BS/2,-BS/2+d,-BS/2, 0,0,0, c,
1187                                                         ap.x1(), ap.y1()),
1188                                         video::S3DVertex(BS/2,g*BS/2+d,BS/2, 0,0,0, c,
1189                                                         ap.x1(), ap.y0()),
1190                                         video::S3DVertex(-BS/2,g*BS/2+d,BS/2, 0,0,0, c,
1191                                                         ap.x0(), ap.y0()),
1192                         };
1193
1194                         for(s32 i=0; i<4; i++)
1195                         {
1196                                 if(angle != 0)
1197                                         vertices[i].Pos.rotateXZBy(angle);
1198                                 vertices[i].Pos += intToFloat(p, BS);
1199                         }
1200
1201                         u16 indices[] = {0,1,2,2,3,0};
1202                         collector.append(tile, vertices, 4, indices, 6);
1203                 break;}
1204                 case NDT_NODEBOX:
1205                 {
1206                         static const v3s16 tile_dirs[6] = {
1207                                 v3s16(0, 1, 0),
1208                                 v3s16(0, -1, 0),
1209                                 v3s16(1, 0, 0),
1210                                 v3s16(-1, 0, 0),
1211                                 v3s16(0, 0, 1),
1212                                 v3s16(0, 0, -1)
1213                         };
1214                         TileSpec tiles[6];
1215
1216                         u16 l = getInteriorLight(n, 0, data);
1217                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
1218
1219                         v3f pos = intToFloat(p, BS);
1220
1221                         std::vector<aabb3f> boxes = n.getNodeBoxes(nodedef);
1222                         for(std::vector<aabb3f>::iterator
1223                                         i = boxes.begin();
1224                                         i != boxes.end(); i++)
1225                         {
1226                         for(int j = 0; j < 6; j++)
1227                                 {
1228                                 // Handles facedir rotation for textures
1229                                 tiles[j] = getNodeTile(n, p, tile_dirs[j], data);
1230                                 }
1231                                 aabb3f box = *i;
1232                                 box.MinEdge += pos;
1233                                 box.MaxEdge += pos;
1234
1235                                 f32 temp;
1236                                 if (box.MinEdge.X > box.MaxEdge.X)
1237                                 {
1238                                         temp=box.MinEdge.X;
1239                                         box.MinEdge.X=box.MaxEdge.X;
1240                                         box.MaxEdge.X=temp;
1241                                 }
1242                                 if (box.MinEdge.Y > box.MaxEdge.Y)
1243                                 {
1244                                         temp=box.MinEdge.Y;
1245                                         box.MinEdge.Y=box.MaxEdge.Y;
1246                                         box.MaxEdge.Y=temp;
1247                                 }
1248                                 if (box.MinEdge.Z > box.MaxEdge.Z)
1249                                 {
1250                                         temp=box.MinEdge.Z;
1251                                         box.MinEdge.Z=box.MaxEdge.Z;
1252                                         box.MaxEdge.Z=temp;
1253                                 }
1254
1255                                 //
1256                                 // Compute texture coords
1257                                 f32 tx1 = (box.MinEdge.X/BS)+0.5;
1258                                 f32 ty1 = (box.MinEdge.Y/BS)+0.5;
1259                                 f32 tz1 = (box.MinEdge.Z/BS)+0.5;
1260                                 f32 tx2 = (box.MaxEdge.X/BS)+0.5;
1261                                 f32 ty2 = (box.MaxEdge.Y/BS)+0.5;
1262                                 f32 tz2 = (box.MaxEdge.Z/BS)+0.5;
1263                                 f32 txc[24] = {
1264                                         // up
1265                                         tx1, 1-tz2, tx2, 1-tz1,
1266                                         // down
1267                                         tx1, tz1, tx2, tz2,
1268                                         // right
1269                                         tz1, 1-ty2, tz2, 1-ty1,
1270                                         // left
1271                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
1272                                         // back
1273                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
1274                                         // front
1275                                         tx1, 1-ty2, tx2, 1-ty1,
1276                                 };
1277                                 makeCuboid(&collector, box, tiles, 6, c, txc);
1278                         }
1279                 break;}
1280                 }
1281         }
1282 }
1283