src/content_mapblock.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "content_mapblock.h"
  21
  22 #include "main.h" // For g_settings
  23 #include "mapblock_mesh.h" // For MapBlock_LightColor() and MeshCollector
  24 #include "settings.h"
  25 #include "nodedef.h"
  26 #include "tile.h"
  27 #include "gamedef.h"
  28 #include "util/numeric.h"
  29 #include "util/directiontables.h"
  30
  31 // Create a cuboid.
  32 //  collector - the MeshCollector for the resulting polygons
  33 //  box       - the position and size of the box
  34 //  tiles     - the tiles (materials) to use (for all 6 faces)
  35 //  tilecount - number of entries in tiles, 1<=tilecount<=6
  36 //  c         - vertex colour - used for all
  37 //  txc       - texture coordinates - this is a list of texture coordinates
  38 //              for the opposite corners of each face - therefore, there
  39 //              should be (2+2)*6=24 values in the list. Alternatively, pass
  40 //              NULL to use the entire texture for each face. The order of
  41 //              the faces in the list is up-down-right-left-back-front
  42 //              (compatible with ContentFeatures). If you specified 0,0,1,1
  43 //              for each face, that would be the same as passing NULL.
  44 void makeCuboid(MeshCollector *collector, const aabb3f &box,
  45         TileSpec *tiles, int tilecount,
  46         video::SColor &c, const f32* txc)
  47 {
  48         assert(tilecount >= 1 && tilecount <= 6);
  49
  50         v3f min = box.MinEdge;
  51         v3f max = box.MaxEdge;
  52
  53
  54
  55         if(txc == NULL)
  56         {
  57                 static const f32 txc_default[24] = {
  58                         0,0,1,1,
  59                         0,0,1,1,
  60                         0,0,1,1,
  61                         0,0,1,1,
  62                         0,0,1,1,
  63                         0,0,1,1
  64                 };
  65                 txc = txc_default;
  66         }
  67
  68         video::S3DVertex vertices[24] =
  69         {
  70                 // up
  71                 video::S3DVertex(min.X,max.Y,max.Z, 0,1,0, c, txc[0],txc[1]),
  72                 video::S3DVertex(max.X,max.Y,max.Z, 0,1,0, c, txc[2],txc[1]),
  73                 video::S3DVertex(max.X,max.Y,min.Z, 0,1,0, c, txc[2],txc[3]),
  74                 video::S3DVertex(min.X,max.Y,min.Z, 0,1,0, c, txc[0],txc[3]),
  75                 // down
  76                 video::S3DVertex(min.X,min.Y,min.Z, 0,-1,0, c, txc[4],txc[5]),
  77                 video::S3DVertex(max.X,min.Y,min.Z, 0,-1,0, c, txc[6],txc[5]),
  78                 video::S3DVertex(max.X,min.Y,max.Z, 0,-1,0, c, txc[6],txc[7]),
  79                 video::S3DVertex(min.X,min.Y,max.Z, 0,-1,0, c, txc[4],txc[7]),
  80                 // right
  81                 video::S3DVertex(max.X,max.Y,min.Z, 1,0,0, c, txc[ 8],txc[9]),
  82                 video::S3DVertex(max.X,max.Y,max.Z, 1,0,0, c, txc[10],txc[9]),
  83                 video::S3DVertex(max.X,min.Y,max.Z, 1,0,0, c, txc[10],txc[11]),
  84                 video::S3DVertex(max.X,min.Y,min.Z, 1,0,0, c, txc[ 8],txc[11]),
  85                 // left
  86                 video::S3DVertex(min.X,max.Y,max.Z, -1,0,0, c, txc[12],txc[13]),
  87                 video::S3DVertex(min.X,max.Y,min.Z, -1,0,0, c, txc[14],txc[13]),
  88                 video::S3DVertex(min.X,min.Y,min.Z, -1,0,0, c, txc[14],txc[15]),
  89                 video::S3DVertex(min.X,min.Y,max.Z, -1,0,0, c, txc[12],txc[15]),
  90                 // back
  91                 video::S3DVertex(max.X,max.Y,max.Z, 0,0,1, c, txc[16],txc[17]),
  92                 video::S3DVertex(min.X,max.Y,max.Z, 0,0,1, c, txc[18],txc[17]),
  93                 video::S3DVertex(min.X,min.Y,max.Z, 0,0,1, c, txc[18],txc[19]),
  94                 video::S3DVertex(max.X,min.Y,max.Z, 0,0,1, c, txc[16],txc[19]),
  95                 // front
  96                 video::S3DVertex(min.X,max.Y,min.Z, 0,0,-1, c, txc[20],txc[21]),
  97                 video::S3DVertex(max.X,max.Y,min.Z, 0,0,-1, c, txc[22],txc[21]),
  98                 video::S3DVertex(max.X,min.Y,min.Z, 0,0,-1, c, txc[22],txc[23]),
  99                 video::S3DVertex(min.X,min.Y,min.Z, 0,0,-1, c, txc[20],txc[23]),
 100         };
 101
 102         for(int i = 0; i < 6; i++)
 103                                 {
 104                                 switch (tiles[MYMIN(i, tilecount-1)].rotation)
 105                                 {
 106                                 case 0:
 107                                         break;
 108                                 case 1: //R90
 109                                         for (int x = 0; x < 4; x++)
 110                                                 vertices[i*4+x].TCoords.rotateBy(90,irr::core::vector2df(0, 0));
 111                                         break;
 112                                 case 2: //R180
 113                                         for (int x = 0; x < 4; x++)
 114                                                 vertices[i*4+x].TCoords.rotateBy(180,irr::core::vector2df(0, 0));
 115                                         break;
 116                                 case 3: //R270
 117                                         for (int x = 0; x < 4; x++)
 118                                                 vertices[i*4+x].TCoords.rotateBy(270,irr::core::vector2df(0, 0));
 119                                         break;
 120                                 case 4: //FXR90
 121                                         for (int x = 0; x < 4; x++){
 122                                                 vertices[i*4+x].TCoords.X = 1.0 - vertices[i*4+x].TCoords.X;
 123                                                 vertices[i*4+x].TCoords.rotateBy(90,irr::core::vector2df(0, 0));
 124                                         }
 125                                         break;
 126                                 case 5: //FXR270
 127                                         for (int x = 0; x < 4; x++){
 128                                                 vertices[i*4+x].TCoords.X = 1.0 - vertices[i*4+x].TCoords.X;
 129                                                 vertices[i*4+x].TCoords.rotateBy(270,irr::core::vector2df(0, 0));
 130                                         }
 131                                         break;
 132                                 case 6: //FYR90
 133                                         for (int x = 0; x < 4; x++){
 134                                                 vertices[i*4+x].TCoords.Y = 1.0 - vertices[i*4+x].TCoords.Y;
 135                                                 vertices[i*4+x].TCoords.rotateBy(90,irr::core::vector2df(0, 0));
 136                                         }
 137                                         break;
 138                                 case 7: //FYR270
 139                                         for (int x = 0; x < 4; x++){
 140                                                 vertices[i*4+x].TCoords.Y = 1.0 - vertices[i*4+x].TCoords.Y;
 141                                                 vertices[i*4+x].TCoords.rotateBy(270,irr::core::vector2df(0, 0));
 142                                         }
 143                                         break;
 144                                 case 8: //FX
 145                                         for (int x = 0; x < 4; x++){
 146                                                 vertices[i*4+x].TCoords.X = 1.0 - vertices[i*4+x].TCoords.X;
 147                                         }
 148                                         break;
 149                                 case 9: //FY
 150                                         for (int x = 0; x < 4; x++){
 151                                                 vertices[i*4+x].TCoords.Y = 1.0 - vertices[i*4+x].TCoords.Y;
 152                                         }
 153                                         break;
 154                                 default:
 155                                         break;
 156                                 }
 157                         }
 158         u16 indices[] = {0,1,2,2,3,0};
 159         // Add to mesh collector
 160         for(s32 j=0; j<24; j+=4)
 161         {
 162                 int tileindex = MYMIN(j/4, tilecount-1);
 163                 collector->append(tiles[tileindex],
 164                                 vertices+j, 4, indices, 6);
 165         }
 166 }
 167
 168 void mapblock_mesh_generate_special(MeshMakeData *data,
 169                 MeshCollector &collector)
 170 {
 171         INodeDefManager *nodedef = data->m_gamedef->ndef();
 172
 173         // 0ms
 174         //TimeTaker timer("mapblock_mesh_generate_special()");
 175
 176         /*
 177                 Some settings
 178         */
 179         bool new_style_water = g_settings->getBool("new_style_water");
 180
 181         float node_liquid_level = 1.0;
 182         if(new_style_water)
 183                 node_liquid_level = 0.85;
 184
 185         v3s16 blockpos_nodes = data->m_blockpos*MAP_BLOCKSIZE;
 186
 187         for(s16 z=0; z<MAP_BLOCKSIZE; z++)
 188         for(s16 y=0; y<MAP_BLOCKSIZE; y++)
 189         for(s16 x=0; x<MAP_BLOCKSIZE; x++)
 190         {
 191                 v3s16 p(x,y,z);
 192
 193                 MapNode n = data->m_vmanip.getNodeNoEx(blockpos_nodes+p);
 194                 const ContentFeatures &f = nodedef->get(n);
 195
 196                 // Only solidness=0 stuff is drawn here
 197                 if(f.solidness != 0)
 198                         continue;
 199
 200                 switch(f.drawtype){
 201                 default:
 202                         infostream<<"Got "<<f.drawtype<<std::endl;
 203                         assert(0);
 204                         break;
 205                 case NDT_AIRLIKE:
 206                         break;
 207                 case NDT_LIQUID:
 208                 {
 209                         /*
 210                                 Add water sources to mesh if using new style
 211                         */
 212                         TileSpec tile_liquid = f.special_tiles[0];
 213                         TileSpec tile_liquid_bfculled = getNodeTile(n, p, v3s16(0,0,0), data);
 214
 215                         bool top_is_same_liquid = false;
 216                         MapNode ntop = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y+1,z));
 217                         content_t c_flowing = nodedef->getId(f.liquid_alternative_flowing);
 218                         content_t c_source = nodedef->getId(f.liquid_alternative_source);
 219                         if(ntop.getContent() == c_flowing || ntop.getContent() == c_source)
 220                                 top_is_same_liquid = true;
 221
 222                         u16 l = getInteriorLight(n, 0, nodedef);
 223                         video::SColor c = MapBlock_LightColor(f.alpha, l, f.light_source);
 224
 225                         /*
 226                                 Generate sides
 227                          */
 228                         v3s16 side_dirs[4] = {
 229                                 v3s16(1,0,0),
 230                                 v3s16(-1,0,0),
 231                                 v3s16(0,0,1),
 232                                 v3s16(0,0,-1),
 233                         };
 234                         for(u32 i=0; i<4; i++)
 235                         {
 236                                 v3s16 dir = side_dirs[i];
 237
 238                                 MapNode neighbor = data->m_vmanip.getNodeNoEx(blockpos_nodes + p + dir);
 239                                 content_t neighbor_content = neighbor.getContent();
 240                                 const ContentFeatures &n_feat = nodedef->get(neighbor_content);
 241                                 MapNode n_top = data->m_vmanip.getNodeNoEx(blockpos_nodes + p + dir+ v3s16(0,1,0));
 242                                 content_t n_top_c = n_top.getContent();
 243
 244                                 if(neighbor_content == CONTENT_IGNORE)
 245                                         continue;
 246
 247                                 /*
 248                                         If our topside is liquid and neighbor's topside
 249                                         is liquid, don't draw side face
 250                                 */
 251                                 if(top_is_same_liquid && (n_top_c == c_flowing ||
 252                                                 n_top_c == c_source || n_top_c == CONTENT_IGNORE))
 253                                         continue;
 254
 255                                 // Don't draw face if neighbor is blocking the view
 256                                 if(n_feat.solidness == 2)
 257                                         continue;
 258
 259                                 bool neighbor_is_same_liquid = (neighbor_content == c_source
 260                                                 || neighbor_content == c_flowing);
 261
 262                                 // Don't draw any faces if neighbor same is liquid and top is
 263                                 // same liquid
 264                                 if(neighbor_is_same_liquid && !top_is_same_liquid)
 265                                         continue;
 266
 267                                 // Use backface culled material if neighbor doesn't have a
 268                                 // solidness of 0
 269                                 const TileSpec *current_tile = &tile_liquid;
 270                                 if(n_feat.solidness != 0 || n_feat.visual_solidness != 0)
 271                                         current_tile = &tile_liquid_bfculled;
 272
 273                                 video::S3DVertex vertices[4] =
 274                                 {
 275                                         video::S3DVertex(-BS/2,0,BS/2,0,0,0, c, 0,1),
 276                                         video::S3DVertex(BS/2,0,BS/2,0,0,0, c, 1,1),
 277                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,0),
 278                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,0),
 279                                 };
 280
 281                                 /*
 282                                         If our topside is liquid, set upper border of face
 283                                         at upper border of node
 284                                 */
 285                                 if(top_is_same_liquid)
 286                                 {
 287                                         vertices[2].Pos.Y = 0.5*BS;
 288                                         vertices[3].Pos.Y = 0.5*BS;
 289                                 }
 290                                 /*
 291                                         Otherwise upper position of face is liquid level
 292                                 */
 293                                 else
 294                                 {
 295                                         vertices[2].Pos.Y = (node_liquid_level-0.5)*BS;
 296                                         vertices[3].Pos.Y = (node_liquid_level-0.5)*BS;
 297                                 }
 298                                 /*
 299                                         If neighbor is liquid, lower border of face is liquid level
 300                                 */
 301                                 if(neighbor_is_same_liquid)
 302                                 {
 303                                         vertices[0].Pos.Y = (node_liquid_level-0.5)*BS;
 304                                         vertices[1].Pos.Y = (node_liquid_level-0.5)*BS;
 305                                 }
 306                                 /*
 307                                         If neighbor is not liquid, lower border of face is
 308                                         lower border of node
 309                                 */
 310                                 else
 311                                 {
 312                                         vertices[0].Pos.Y = -0.5*BS;
 313                                         vertices[1].Pos.Y = -0.5*BS;
 314                                 }
 315
 316                                 for(s32 j=0; j<4; j++)
 317                                 {
 318                                         if(dir == v3s16(0,0,1))
 319                                                 vertices[j].Pos.rotateXZBy(0);
 320                                         if(dir == v3s16(0,0,-1))
 321                                                 vertices[j].Pos.rotateXZBy(180);
 322                                         if(dir == v3s16(-1,0,0))
 323                                                 vertices[j].Pos.rotateXZBy(90);
 324                                         if(dir == v3s16(1,0,-0))
 325                                                 vertices[j].Pos.rotateXZBy(-90);
 326
 327                                         // Do this to not cause glitches when two liquids are
 328                                         // side-by-side
 329                                         /*if(neighbor_is_same_liquid == false){
 330                                                 vertices[j].Pos.X *= 0.98;
 331                                                 vertices[j].Pos.Z *= 0.98;
 332                                         }*/
 333
 334                                         vertices[j].Pos += intToFloat(p, BS);
 335                                 }
 336
 337                                 u16 indices[] = {0,1,2,2,3,0};
 338                                 // Add to mesh collector
 339                                 collector.append(*current_tile, vertices, 4, indices, 6);
 340                         }
 341
 342                         /*
 343                                 Generate top
 344                          */
 345                         if(top_is_same_liquid)
 346                                 continue;
 347
 348                         video::S3DVertex vertices[4] =
 349                         {
 350                                 video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,1),
 351                                 video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,1),
 352                                 video::S3DVertex(BS/2,0,-BS/2, 0,0,0, c, 1,0),
 353                                 video::S3DVertex(-BS/2,0,-BS/2, 0,0,0, c, 0,0),
 354                         };
 355
 356                         v3f offset(p.X*BS, p.Y*BS + (-0.5+node_liquid_level)*BS, p.Z*BS);
 357                         for(s32 i=0; i<4; i++)
 358                         {
 359                                 vertices[i].Pos += offset;
 360                         }
 361
 362                         u16 indices[] = {0,1,2,2,3,0};
 363                         // Add to mesh collector
 364                         collector.append(tile_liquid, vertices, 4, indices, 6);
 365                 break;}
 366                 case NDT_FLOWINGLIQUID:
 367                 {
 368                         /*
 369                                 Add flowing liquid to mesh
 370                         */
 371                         TileSpec tile_liquid = f.special_tiles[0];
 372                         TileSpec tile_liquid_bfculled = f.special_tiles[1];
 373
 374                         bool top_is_same_liquid = false;
 375                         MapNode ntop = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y+1,z));
 376                         content_t c_flowing = nodedef->getId(f.liquid_alternative_flowing);
 377                         content_t c_source = nodedef->getId(f.liquid_alternative_source);
 378                         if(ntop.getContent() == c_flowing || ntop.getContent() == c_source)
 379                                 top_is_same_liquid = true;
 380
 381                         u16 l = 0;
 382                         // If this liquid emits light and doesn't contain light, draw
 383                         // it at what it emits, for an increased effect
 384                         u8 light_source = nodedef->get(n).light_source;
 385                         if(light_source != 0){
 386                                 l = decode_light(light_source);
 387                                 l = l | (l<<8);
 388                         }
 389                         // Use the light of the node on top if possible
 390                         else if(nodedef->get(ntop).param_type == CPT_LIGHT)
 391                                 l = getInteriorLight(ntop, 0, nodedef);
 392                         // Otherwise use the light of this node (the liquid)
 393                         else
 394                                 l = getInteriorLight(n, 0, nodedef);
 395                         video::SColor c = MapBlock_LightColor(f.alpha, l, f.light_source);
 396
 397                         u8 range = rangelim(nodedef->get(c_flowing).liquid_range, 1, 8);
 398
 399                         // Neighbor liquid levels (key = relative position)
 400                         // Includes current node
 401                         std::map<v3s16, f32> neighbor_levels;
 402                         std::map<v3s16, content_t> neighbor_contents;
 403                         std::map<v3s16, u8> neighbor_flags;
 404                         const u8 neighborflag_top_is_same_liquid = 0x01;
 405                         v3s16 neighbor_dirs[9] = {
 406                                 v3s16(0,0,0),
 407                                 v3s16(0,0,1),
 408                                 v3s16(0,0,-1),
 409                                 v3s16(1,0,0),
 410                                 v3s16(-1,0,0),
 411                                 v3s16(1,0,1),
 412                                 v3s16(-1,0,-1),
 413                                 v3s16(1,0,-1),
 414                                 v3s16(-1,0,1),
 415                         };
 416                         for(u32 i=0; i<9; i++)
 417                         {
 418                                 content_t content = CONTENT_AIR;
 419                                 float level = -0.5 * BS;
 420                                 u8 flags = 0;
 421                                 // Check neighbor
 422                                 v3s16 p2 = p + neighbor_dirs[i];
 423                                 MapNode n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
 424                                 if(n2.getContent() != CONTENT_IGNORE)
 425                                 {
 426                                         content = n2.getContent();
 427
 428                                         if(n2.getContent() == c_source)
 429                                                 level = (-0.5+node_liquid_level) * BS;
 430                                         else if(n2.getContent() == c_flowing){
 431                                                 u8 liquid_level = (n2.param2&LIQUID_LEVEL_MASK);
 432                                                 if (liquid_level <= LIQUID_LEVEL_MAX+1-range)
 433                                                         liquid_level = 0;
 434                                                 else
 435                                                         liquid_level -= (LIQUID_LEVEL_MAX+1-range);
 436                                                 level = (-0.5 + ((float)liquid_level+ 0.5) / (float)range * node_liquid_level) * BS;
 437                                         }
 438
 439                                         // Check node above neighbor.
 440                                         // NOTE: This doesn't get executed if neighbor
 441                                         //       doesn't exist
 442                                         p2.Y += 1;
 443                                         n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
 444                                         if(n2.getContent() == c_source ||
 445                                                         n2.getContent() == c_flowing)
 446                                                 flags |= neighborflag_top_is_same_liquid;
 447                                 }
 448
 449                                 neighbor_levels[neighbor_dirs[i]] = level;
 450                                 neighbor_contents[neighbor_dirs[i]] = content;
 451                                 neighbor_flags[neighbor_dirs[i]] = flags;
 452                         }
 453
 454                         // Corner heights (average between four liquids)
 455                         f32 corner_levels[4];
 456
 457                         v3s16 halfdirs[4] = {
 458                                 v3s16(0,0,0),
 459                                 v3s16(1,0,0),
 460                                 v3s16(1,0,1),
 461                                 v3s16(0,0,1),
 462                         };
 463                         for(u32 i=0; i<4; i++)
 464                         {
 465                                 v3s16 cornerdir = halfdirs[i];
 466                                 float cornerlevel = 0;
 467                                 u32 valid_count = 0;
 468                                 u32 air_count = 0;
 469                                 for(u32 j=0; j<4; j++)
 470                                 {
 471                                         v3s16 neighbordir = cornerdir - halfdirs[j];
 472                                         content_t content = neighbor_contents[neighbordir];
 473                                         // If top is liquid, draw starting from top of node
 474                                         if(neighbor_flags[neighbordir] &
 475                                                         neighborflag_top_is_same_liquid)
 476                                         {
 477                                                 cornerlevel = 0.5*BS;
 478                                                 valid_count = 1;
 479                                                 break;
 480                                         }
 481                                         // Source is always the same height
 482                                         else if(content == c_source)
 483                                         {
 484                                                 cornerlevel = (-0.5+node_liquid_level)*BS;
 485                                                 valid_count = 1;
 486                                                 break;
 487                                         }
 488                                         // Flowing liquid has level information
 489                                         else if(content == c_flowing)
 490                                         {
 491                                                 cornerlevel += neighbor_levels[neighbordir];
 492                                                 valid_count++;
 493                                         }
 494                                         else if(content == CONTENT_AIR)
 495                                         {
 496                                                 air_count++;
 497                                         }
 498                                 }
 499                                 if(air_count >= 2)
 500                                         cornerlevel = -0.5*BS+0.2;
 501                                 else if(valid_count > 0)
 502                                         cornerlevel /= valid_count;
 503                                 corner_levels[i] = cornerlevel;
 504                         }
 505
 506                         /*
 507                                 Generate sides
 508                         */
 509
 510                         v3s16 side_dirs[4] = {
 511                                 v3s16(1,0,0),
 512                                 v3s16(-1,0,0),
 513                                 v3s16(0,0,1),
 514                                 v3s16(0,0,-1),
 515                         };
 516                         s16 side_corners[4][2] = {
 517                                 {1, 2},
 518                                 {3, 0},
 519                                 {2, 3},
 520                                 {0, 1},
 521                         };
 522                         for(u32 i=0; i<4; i++)
 523                         {
 524                                 v3s16 dir = side_dirs[i];
 525
 526                                 /*
 527                                         If our topside is liquid and neighbor's topside
 528                                         is liquid, don't draw side face
 529                                 */
 530                                 if(top_is_same_liquid &&
 531                                                 neighbor_flags[dir] & neighborflag_top_is_same_liquid)
 532                                         continue;
 533
 534                                 content_t neighbor_content = neighbor_contents[dir];
 535                                 const ContentFeatures &n_feat = nodedef->get(neighbor_content);
 536
 537                                 // Don't draw face if neighbor is blocking the view
 538                                 if(n_feat.solidness == 2)
 539                                         continue;
 540
 541                                 bool neighbor_is_same_liquid = (neighbor_content == c_source
 542                                                 || neighbor_content == c_flowing);
 543
 544                                 // Don't draw any faces if neighbor same is liquid and top is
 545                                 // same liquid
 546                                 if(neighbor_is_same_liquid == true
 547                                                 && top_is_same_liquid == false)
 548                                         continue;
 549
 550                                 // Use backface culled material if neighbor doesn't have a
 551                                 // solidness of 0
 552                                 const TileSpec *current_tile = &tile_liquid;
 553                                 if(n_feat.solidness != 0 || n_feat.visual_solidness != 0)
 554                                         current_tile = &tile_liquid_bfculled;
 555
 556                                 video::S3DVertex vertices[4] =
 557                                 {
 558                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,1),
 559                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,1),
 560                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,0),
 561                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,0),
 562                                 };
 563
 564                                 /*
 565                                         If our topside is liquid, set upper border of face
 566                                         at upper border of node
 567                                 */
 568                                 if(top_is_same_liquid)
 569                                 {
 570                                         vertices[2].Pos.Y = 0.5*BS;
 571                                         vertices[3].Pos.Y = 0.5*BS;
 572                                 }
 573                                 /*
 574                                         Otherwise upper position of face is corner levels
 575                                 */
 576                                 else
 577                                 {
 578                                         vertices[2].Pos.Y = corner_levels[side_corners[i][0]];
 579                                         vertices[3].Pos.Y = corner_levels[side_corners[i][1]];
 580                                 }
 581
 582                                 /*
 583                                         If neighbor is liquid, lower border of face is corner
 584                                         liquid levels
 585                                 */
 586                                 if(neighbor_is_same_liquid)
 587                                 {
 588                                         vertices[0].Pos.Y = corner_levels[side_corners[i][1]];
 589                                         vertices[1].Pos.Y = corner_levels[side_corners[i][0]];
 590                                 }
 591                                 /*
 592                                         If neighbor is not liquid, lower border of face is
 593                                         lower border of node
 594                                 */
 595                                 else
 596                                 {
 597                                         vertices[0].Pos.Y = -0.5*BS;
 598                                         vertices[1].Pos.Y = -0.5*BS;
 599                                 }
 600
 601                                 for(s32 j=0; j<4; j++)
 602                                 {
 603                                         if(dir == v3s16(0,0,1))
 604                                                 vertices[j].Pos.rotateXZBy(0);
 605                                         if(dir == v3s16(0,0,-1))
 606                                                 vertices[j].Pos.rotateXZBy(180);
 607                                         if(dir == v3s16(-1,0,0))
 608                                                 vertices[j].Pos.rotateXZBy(90);
 609                                         if(dir == v3s16(1,0,-0))
 610                                                 vertices[j].Pos.rotateXZBy(-90);
 611
 612                                         // Do this to not cause glitches when two liquids are
 613                                         // side-by-side
 614                                         /*if(neighbor_is_same_liquid == false){
 615                                                 vertices[j].Pos.X *= 0.98;
 616                                                 vertices[j].Pos.Z *= 0.98;
 617                                         }*/
 618
 619                                         vertices[j].Pos += intToFloat(p, BS);
 620                                 }
 621
 622                                 u16 indices[] = {0,1,2,2,3,0};
 623                                 // Add to mesh collector
 624                                 collector.append(*current_tile, vertices, 4, indices, 6);
 625                         }
 626
 627                         /*
 628                                 Generate top side, if appropriate
 629                         */
 630
 631                         if(top_is_same_liquid == false)
 632                         {
 633                                 video::S3DVertex vertices[4] =
 634                                 {
 635                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,1),
 636                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,1),
 637                                         video::S3DVertex(BS/2,0,-BS/2, 0,0,0, c, 1,0),
 638                                         video::S3DVertex(-BS/2,0,-BS/2, 0,0,0, c, 0,0),
 639                                 };
 640
 641                                 // To get backface culling right, the vertices need to go
 642                                 // clockwise around the front of the face. And we happened to
 643                                 // calculate corner levels in exact reverse order.
 644                                 s32 corner_resolve[4] = {3,2,1,0};
 645
 646                                 for(s32 i=0; i<4; i++)
 647                                 {
 648                                         //vertices[i].Pos.Y += liquid_level;
 649                                         //vertices[i].Pos.Y += neighbor_levels[v3s16(0,0,0)];
 650                                         s32 j = corner_resolve[i];
 651                                         vertices[i].Pos.Y += corner_levels[j];
 652                                         vertices[i].Pos += intToFloat(p, BS);
 653                                 }
 654
 655                                 // Default downwards-flowing texture animation goes from
 656                                 // -Z towards +Z, thus the direction is +Z.
 657                                 // Rotate texture to make animation go in flow direction
 658                                 // Positive if liquid moves towards +Z
 659                                 f32 dz = (corner_levels[side_corners[3][0]] +
 660                                                 corner_levels[side_corners[3][1]]) -
 661                                                 (corner_levels[side_corners[2][0]] +
 662                                                 corner_levels[side_corners[2][1]]);
 663                                 // Positive if liquid moves towards +X
 664                                 f32 dx = (corner_levels[side_corners[1][0]] +
 665                                                 corner_levels[side_corners[1][1]]) -
 666                                                 (corner_levels[side_corners[0][0]] +
 667                                                 corner_levels[side_corners[0][1]]);
 668                                 f32 tcoord_angle = atan2(dz, dx) * core::RADTODEG ;
 669                                 v2f tcoord_center(0.5, 0.5);
 670                                 v2f tcoord_translate(
 671                                                 blockpos_nodes.Z + z,
 672                                                 blockpos_nodes.X + x);
 673                                 tcoord_translate.rotateBy(tcoord_angle);
 674                                 tcoord_translate.X -= floor(tcoord_translate.X);
 675                                 tcoord_translate.Y -= floor(tcoord_translate.Y);
 676
 677                                 for(s32 i=0; i<4; i++)
 678                                 {
 679                                         vertices[i].TCoords.rotateBy(
 680                                                         tcoord_angle,
 681                                                         tcoord_center);
 682                                         vertices[i].TCoords += tcoord_translate;
 683                                 }
 684
 685                                 v2f t = vertices[0].TCoords;
 686                                 vertices[0].TCoords = vertices[2].TCoords;
 687                                 vertices[2].TCoords = t;
 688
 689                                 u16 indices[] = {0,1,2,2,3,0};
 690                                 // Add to mesh collector
 691                                 collector.append(tile_liquid, vertices, 4, indices, 6);
 692                         }
 693                 break;}
 694                 case NDT_GLASSLIKE:
 695                 {
 696                         TileSpec tile = getNodeTile(n, p, v3s16(0,0,0), data);
 697
 698                         u16 l = getInteriorLight(n, 1, nodedef);
 699                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
 700
 701                         for(u32 j=0; j<6; j++)
 702                         {
 703                                 // Check this neighbor
 704                                 v3s16 n2p = blockpos_nodes + p + g_6dirs[j];
 705                                 MapNode n2 = data->m_vmanip.getNodeNoEx(n2p);
 706                                 // Don't make face if neighbor is of same type
 707                                 if(n2.getContent() == n.getContent())
 708                                         continue;
 709
 710                                 // The face at Z+
 711                                 video::S3DVertex vertices[4] = {
 712                                         video::S3DVertex(-BS/2,-BS/2,BS/2, 0,0,0, c, 1,1),
 713                                         video::S3DVertex(BS/2,-BS/2,BS/2, 0,0,0, c, 0,1),
 714                                         video::S3DVertex(BS/2,BS/2,BS/2, 0,0,0, c, 0,0),
 715                                         video::S3DVertex(-BS/2,BS/2,BS/2, 0,0,0, c, 1,0),
 716                                 };
 717
 718                                 // Rotations in the g_6dirs format
 719                                 if(j == 0) // Z+
 720                                         for(u16 i=0; i<4; i++)
 721                                                 vertices[i].Pos.rotateXZBy(0);
 722                                 else if(j == 1) // Y+
 723                                         for(u16 i=0; i<4; i++)
 724                                                 vertices[i].Pos.rotateYZBy(-90);
 725                                 else if(j == 2) // X+
 726                                         for(u16 i=0; i<4; i++)
 727                                                 vertices[i].Pos.rotateXZBy(-90);
 728                                 else if(j == 3) // Z-
 729                                         for(u16 i=0; i<4; i++)
 730                                                 vertices[i].Pos.rotateXZBy(180);
 731                                 else if(j == 4) // Y-
 732                                         for(u16 i=0; i<4; i++)
 733                                                 vertices[i].Pos.rotateYZBy(90);
 734                                 else if(j == 5) // X-
 735                                         for(u16 i=0; i<4; i++)
 736                                                 vertices[i].Pos.rotateXZBy(90);
 737
 738                                 for(u16 i=0; i<4; i++){
 739                                         vertices[i].Pos += intToFloat(p, BS);
 740                                 }
 741
 742                                 u16 indices[] = {0,1,2,2,3,0};
 743                                 // Add to mesh collector
 744                                 collector.append(tile, vertices, 4, indices, 6);
 745                         }
 746                 break;}
 747                 case NDT_GLASSLIKE_FRAMED:
 748                 {
 749                         static const v3s16 dirs[6] = {
 750                                 v3s16( 0, 1, 0),
 751                                 v3s16( 0,-1, 0),
 752                                 v3s16( 1, 0, 0),
 753                                 v3s16(-1, 0, 0),
 754                                 v3s16( 0, 0, 1),
 755                                 v3s16( 0, 0,-1)
 756                         };
 757
 758                         u8 i;
 759                         TileSpec tiles[6];
 760                         for (i = 0; i < 6; i++)
 761                                 tiles[i] = getNodeTile(n, p, dirs[i], data);
 762
 763                         TileSpec glass_tiles[6];
 764                         if (tiles[1].texture && tiles[2].texture && tiles[3].texture) {
 765                                 glass_tiles[0] = tiles[2];
 766                                 glass_tiles[1] = tiles[3];
 767                                 glass_tiles[2] = tiles[1];
 768                                 glass_tiles[3] = tiles[1];
 769                                 glass_tiles[4] = tiles[1];
 770                                 glass_tiles[5] = tiles[1];
 771                         } else {
 772                                 for (i = 0; i < 6; i++)
 773                                         glass_tiles[i] = tiles[1];
 774                         }
 775
 776                         u8 param2 = n.getParam2();
 777                         bool H_merge = ! bool(param2 & 128);
 778                         bool V_merge = ! bool(param2 & 64);
 779                         param2  = param2 & 63;
 780
 781                         u16 l = getInteriorLight(n, 1, nodedef);
 782                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
 783                         v3f pos = intToFloat(p, BS);
 784                         static const float a = BS / 2;
 785                         static const float g = a - 0.003;
 786                         static const float b = .876 * ( BS / 2 );
 787
 788                         static const aabb3f frame_edges[12] = {
 789                                 aabb3f( b, b,-a, a, a, a), // y+
 790                                 aabb3f(-a, b,-a,-b, a, a), // y+
 791                                 aabb3f( b,-a,-a, a,-b, a), // y-
 792                                 aabb3f(-a,-a,-a,-b,-b, a), // y-
 793                                 aabb3f( b,-a, b, a, a, a), // x+
 794                                 aabb3f( b,-a,-a, a, a,-b), // x+
 795                                 aabb3f(-a,-a, b,-b, a, a), // x-
 796                                 aabb3f(-a,-a,-a,-b, a,-b), // x-
 797                                 aabb3f(-a, b, b, a, a, a), // z+
 798                                 aabb3f(-a,-a, b, a,-b, a), // z+
 799                                 aabb3f(-a,-a,-a, a,-b,-b), // z-
 800                                 aabb3f(-a, b,-a, a, a,-b)  // z-
 801                         };
 802                         static const aabb3f glass_faces[6] = {
 803                                 aabb3f(-g, g,-g, g, g, g), // y+
 804                                 aabb3f(-g,-g,-g, g,-g, g), // y-
 805                                 aabb3f( g,-g,-g, g, g, g), // x+
 806                                 aabb3f(-g,-g,-g,-g, g, g), // x-
 807                                 aabb3f(-g,-g, g, g, g, g), // z+
 808                                 aabb3f(-g,-g,-g, g, g,-g)  // z-
 809                         };
 810
 811                         // table of node visible faces, 0 = invisible
 812                         int visible_faces[6] = {0,0,0,0,0,0};
 813
 814                         // table of neighbours, 1 = same type, checked with g_26dirs
 815                         int nb[18] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
 816
 817                         // g_26dirs to check when only horizontal merge is allowed
 818                         int nb_H_dirs[8] = {0,2,3,5,10,11,12,13};
 819
 820                         content_t current = n.getContent();
 821                         content_t n2c;
 822                         MapNode n2;
 823                         v3s16 n2p;
 824
 825                         // neighbours checks for frames visibility
 826
 827                         if (!H_merge && V_merge) {
 828                                 n2p = blockpos_nodes + p + g_26dirs[1];
 829                                 n2 = data->m_vmanip.getNodeNoEx(n2p);
 830                                 n2c = n2.getContent();
 831                                 if (n2c == current || n2c == CONTENT_IGNORE)
 832                                         nb[1] = 1;
 833                                 n2p = blockpos_nodes + p + g_26dirs[4];
 834                                 n2 = data->m_vmanip.getNodeNoEx(n2p);
 835                                 n2c = n2.getContent();
 836                                 if (n2c == current || n2c == CONTENT_IGNORE)
 837                                         nb[4] = 1;
 838                         } else if (H_merge && !V_merge) {
 839                                 for(i = 0; i < 8; i++) {
 840                                         n2p = blockpos_nodes + p + g_26dirs[nb_H_dirs[i]];
 841                                         n2 = data->m_vmanip.getNodeNoEx(n2p);
 842                                         n2c = n2.getContent();
 843                                         if (n2c == current || n2c == CONTENT_IGNORE)
 844                                                 nb[nb_H_dirs[i]] = 1;
 845                                 }
 846                         } else if (H_merge && V_merge) {
 847                                 for(i = 0; i < 18; i++) {
 848                                         n2p = blockpos_nodes + p + g_26dirs[i];
 849                                         n2 = data->m_vmanip.getNodeNoEx(n2p);
 850                                         n2c = n2.getContent();
 851                                         if (n2c == current || n2c == CONTENT_IGNORE)
 852                                                 nb[i] = 1;
 853                                 }
 854                         }
 855
 856                         // faces visibility checks
 857
 858                         if (!V_merge) {
 859                                 visible_faces[0] = 1;
 860                                 visible_faces[1] = 1;
 861                         } else {
 862                                 for(i = 0; i < 2; i++) {
 863                                         n2p = blockpos_nodes + p + dirs[i];
 864                                         n2 = data->m_vmanip.getNodeNoEx(n2p);
 865                                         n2c = n2.getContent();
 866                                         if (n2c != current)
 867                                                 visible_faces[i] = 1;
 868                                 }
 869                         }
 870
 871                         if (!H_merge) {
 872                                 visible_faces[2] = 1;
 873                                 visible_faces[3] = 1;
 874                                 visible_faces[4] = 1;
 875                                 visible_faces[5] = 1;
 876                         } else {
 877                                 for(i = 2; i < 6; i++) {
 878                                         n2p = blockpos_nodes + p + dirs[i];
 879                                         n2 = data->m_vmanip.getNodeNoEx(n2p);
 880                                         n2c = n2.getContent();
 881                                         if (n2c != current)
 882                                                 visible_faces[i] = 1;
 883                                 }
 884                         }
 885
 886                         static const u8 nb_triplet[12*3] = {
 887                                 1,2, 7,  1,5, 6,  4,2,15,  4,5,14,
 888                                 2,0,11,  2,3,13,  5,0,10,  5,3,12,
 889                                 0,1, 8,  0,4,16,  3,4,17,  3,1, 9
 890                         };
 891
 892                         f32 tx1, ty1, tz1, tx2, ty2, tz2;
 893                         aabb3f box;
 894
 895                         for(i = 0; i < 12; i++)
 896                         {
 897                                 int edge_invisible;
 898                                 if (nb[nb_triplet[i*3+2]])
 899                                         edge_invisible = nb[nb_triplet[i*3]] & nb[nb_triplet[i*3+1]];
 900                                 else
 901                                         edge_invisible = nb[nb_triplet[i*3]] ^ nb[nb_triplet[i*3+1]];
 902                                 if (edge_invisible)
 903                                         continue;
 904                                 box = frame_edges[i];
 905                                 box.MinEdge += pos;
 906                                 box.MaxEdge += pos;
 907                                 tx1 = (box.MinEdge.X / BS) + 0.5;
 908                                 ty1 = (box.MinEdge.Y / BS) + 0.5;
 909                                 tz1 = (box.MinEdge.Z / BS) + 0.5;
 910                                 tx2 = (box.MaxEdge.X / BS) + 0.5;
 911                                 ty2 = (box.MaxEdge.Y / BS) + 0.5;
 912                                 tz2 = (box.MaxEdge.Z / BS) + 0.5;
 913                                 f32 txc1[24] = {
 914                                         tx1,   1-tz2,   tx2, 1-tz1,
 915                                         tx1,     tz1,   tx2,   tz2,
 916                                         tz1,   1-ty2,   tz2, 1-ty1,
 917                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
 918                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
 919                                         tx1,   1-ty2,   tx2, 1-ty1,
 920                                 };
 921                                 makeCuboid(&collector, box, &tiles[0], 1, c, txc1);
 922                         }
 923
 924                         for(i = 0; i < 6; i++)
 925                         {
 926                                 if (!visible_faces[i])
 927                                         continue;
 928                                 box = glass_faces[i];
 929                                 box.MinEdge += pos;
 930                                 box.MaxEdge += pos;
 931                                 tx1 = (box.MinEdge.X / BS) + 0.5;
 932                                 ty1 = (box.MinEdge.Y / BS) + 0.5;
 933                                 tz1 = (box.MinEdge.Z / BS) + 0.5;
 934                                 tx2 = (box.MaxEdge.X / BS) + 0.5;
 935                                 ty2 = (box.MaxEdge.Y / BS) + 0.5;
 936                                 tz2 = (box.MaxEdge.Z / BS) + 0.5;
 937                                 f32 txc2[24] = {
 938                                         tx1,   1-tz2,   tx2, 1-tz1,
 939                                         tx1,     tz1,   tx2,   tz2,
 940                                         tz1,   1-ty2,   tz2, 1-ty1,
 941                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
 942                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
 943                                         tx1,   1-ty2,   tx2, 1-ty1,
 944                                 };
 945                                 makeCuboid(&collector, box, &glass_tiles[i], 1, c, txc2);
 946                         }
 947
 948                         if (param2 > 0 && f.special_tiles[0].texture) {
 949                                 // Interior volume level is in range 0 .. 63,
 950                                 // convert it to -0.5 .. 0.5
 951                                 float vlev = (((float)param2 / 63.0 ) * 2.0 - 1.0);
 952                                 TileSpec interior_tiles[6];
 953                                 for (i = 0; i < 6; i++)
 954                                         interior_tiles[i] = f.special_tiles[0];
 955                                 float offset = 0.003;
 956                                 box = aabb3f(visible_faces[3] ? -b : -a + offset,
 957                                                          visible_faces[1] ? -b : -a + offset,
 958                                                          visible_faces[5] ? -b : -a + offset,
 959                                                          visible_faces[2] ? b : a - offset,
 960                                                          visible_faces[0] ? b * vlev : a * vlev - offset,
 961                                                          visible_faces[4] ? b : a - offset);
 962                                 box.MinEdge += pos;
 963                                 box.MaxEdge += pos;
 964                                 tx1 = (box.MinEdge.X / BS) + 0.5;
 965                                 ty1 = (box.MinEdge.Y / BS) + 0.5;
 966                                 tz1 = (box.MinEdge.Z / BS) + 0.5;
 967                                 tx2 = (box.MaxEdge.X / BS) + 0.5;
 968                                 ty2 = (box.MaxEdge.Y / BS) + 0.5;
 969                                 tz2 = (box.MaxEdge.Z / BS) + 0.5;
 970                                 f32 txc3[24] = {
 971                                         tx1,   1-tz2,   tx2, 1-tz1,
 972                                         tx1,     tz1,   tx2,   tz2,
 973                                         tz1,   1-ty2,   tz2, 1-ty1,
 974                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
 975                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
 976                                         tx1,   1-ty2,   tx2, 1-ty1,
 977                                 };
 978                                 makeCuboid(&collector, box, interior_tiles, 6, c,  txc3);
 979                         }
 980                 break;}
 981                 case NDT_ALLFACES:
 982                 {
 983                         TileSpec tile_leaves = getNodeTile(n, p,
 984                                         v3s16(0,0,0), data);
 985
 986                         u16 l = getInteriorLight(n, 1, nodedef);
 987                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
 988
 989                         v3f pos = intToFloat(p, BS);
 990                         aabb3f box(-BS/2,-BS/2,-BS/2,BS/2,BS/2,BS/2);
 991                         box.MinEdge += pos;
 992                         box.MaxEdge += pos;
 993                         makeCuboid(&collector, box, &tile_leaves, 1, c, NULL);
 994                 break;}
 995                 case NDT_ALLFACES_OPTIONAL:
 996                         // This is always pre-converted to something else
 997                         assert(0);
 998                         break;
 999                 case NDT_TORCHLIKE:
1000                 {
1001                         v3s16 dir = n.getWallMountedDir(nodedef);
1002
1003                         u8 tileindex = 0;
1004                         if(dir == v3s16(0,-1,0)){
1005                                 tileindex = 0; // floor
1006                         } else if(dir == v3s16(0,1,0)){
1007                                 tileindex = 1; // ceiling
1008                         // For backwards compatibility
1009                         } else if(dir == v3s16(0,0,0)){
1010                                 tileindex = 0; // floor
1011                         } else {
1012                                 tileindex = 2; // side
1013                         }
1014
1015                         TileSpec tile = getNodeTileN(n, p, tileindex, data);
1016                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
1017                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
1018
1019                         u16 l = getInteriorLight(n, 1, nodedef);
1020                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
1021
1022                         float s = BS/2*f.visual_scale;
1023                         // Wall at X+ of node
1024                         video::S3DVertex vertices[4] =
1025                         {
1026                                 video::S3DVertex(-s,-s,0, 0,0,0, c, 0,1),
1027                                 video::S3DVertex( s,-s,0, 0,0,0, c, 1,1),
1028                                 video::S3DVertex( s, s,0, 0,0,0, c, 1,0),
1029                                 video::S3DVertex(-s, s,0, 0,0,0, c, 0,0),
1030                         };
1031
1032                         for(s32 i=0; i<4; i++)
1033                         {
1034                                 if(dir == v3s16(1,0,0))
1035                                         vertices[i].Pos.rotateXZBy(0);
1036                                 if(dir == v3s16(-1,0,0))
1037                                         vertices[i].Pos.rotateXZBy(180);
1038                                 if(dir == v3s16(0,0,1))
1039                                         vertices[i].Pos.rotateXZBy(90);
1040                                 if(dir == v3s16(0,0,-1))
1041                                         vertices[i].Pos.rotateXZBy(-90);
1042                                 if(dir == v3s16(0,-1,0))
1043                                         vertices[i].Pos.rotateXZBy(45);
1044                                 if(dir == v3s16(0,1,0))
1045                                         vertices[i].Pos.rotateXZBy(-45);
1046
1047                                 vertices[i].Pos += intToFloat(p, BS);
1048                         }
1049
1050                         u16 indices[] = {0,1,2,2,3,0};
1051                         // Add to mesh collector
1052                         collector.append(tile, vertices, 4, indices, 6);
1053                 break;}
1054                 case NDT_SIGNLIKE:
1055                 {
1056                         TileSpec tile = getNodeTileN(n, p, 0, data);
1057                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
1058                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
1059
1060                         u16 l = getInteriorLight(n, 0, nodedef);
1061                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
1062
1063                         float d = (float)BS/16;
1064                         float s = BS/2*f.visual_scale;
1065                         // Wall at X+ of node
1066                         video::S3DVertex vertices[4] =
1067                         {
1068                                 video::S3DVertex(BS/2-d,  s,  s, 0,0,0, c, 0,0),
1069                                 video::S3DVertex(BS/2-d,  s, -s, 0,0,0, c, 1,0),
1070                                 video::S3DVertex(BS/2-d, -s, -s, 0,0,0, c, 1,1),
1071                                 video::S3DVertex(BS/2-d, -s,  s, 0,0,0, c, 0,1),
1072                         };
1073
1074                         v3s16 dir = n.getWallMountedDir(nodedef);
1075
1076                         for(s32 i=0; i<4; i++)
1077                         {
1078                                 if(dir == v3s16(1,0,0))
1079                                         vertices[i].Pos.rotateXZBy(0);
1080                                 if(dir == v3s16(-1,0,0))
1081                                         vertices[i].Pos.rotateXZBy(180);
1082                                 if(dir == v3s16(0,0,1))
1083                                         vertices[i].Pos.rotateXZBy(90);
1084                                 if(dir == v3s16(0,0,-1))
1085                                         vertices[i].Pos.rotateXZBy(-90);
1086                                 if(dir == v3s16(0,-1,0))
1087                                         vertices[i].Pos.rotateXYBy(-90);
1088                                 if(dir == v3s16(0,1,0))
1089                                         vertices[i].Pos.rotateXYBy(90);
1090
1091                                 vertices[i].Pos += intToFloat(p, BS);
1092                         }
1093
1094                         u16 indices[] = {0,1,2,2,3,0};
1095                         // Add to mesh collector
1096                         collector.append(tile, vertices, 4, indices, 6);
1097                 break;}
1098                 case NDT_PLANTLIKE:
1099                 {
1100                         TileSpec tile = getNodeTileN(n, p, 0, data);
1101                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
1102
1103                         u16 l = getInteriorLight(n, 1, nodedef);
1104                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
1105
1106                         float s = BS/2*f.visual_scale;
1107
1108                         for(u32 j=0; j<2; j++)
1109                         {
1110                                 video::S3DVertex vertices[4] =
1111                                 {
1112                                         video::S3DVertex(-s,-BS/2,      0, 0,0,0, c, 0,1),
1113                                         video::S3DVertex( s,-BS/2,      0, 0,0,0, c, 1,1),
1114                                         video::S3DVertex( s,-BS/2 + s*2,0, 0,0,0, c, 1,0),
1115                                         video::S3DVertex(-s,-BS/2 + s*2,0, 0,0,0, c, 0,0),
1116                                 };
1117
1118                                 if(j == 0)
1119                                 {
1120                                         for(u16 i=0; i<4; i++)
1121                                                 vertices[i].Pos.rotateXZBy(46 + n.param2 * 2);
1122                                 }
1123                                 else if(j == 1)
1124                                 {
1125                                         for(u16 i=0; i<4; i++)
1126                                                 vertices[i].Pos.rotateXZBy(-44 + n.param2 * 2);
1127                                 }
1128
1129                                 for(u16 i=0; i<4; i++)
1130                                 {
1131                                         vertices[i].Pos *= f.visual_scale;
1132                                         vertices[i].Pos += intToFloat(p, BS);
1133                                 }
1134
1135                                 u16 indices[] = {0,1,2,2,3,0};
1136                                 // Add to mesh collector
1137                                 collector.append(tile, vertices, 4, indices, 6);
1138                         }
1139                 break;}
1140                 case NDT_FENCELIKE:
1141                 {
1142                         TileSpec tile = getNodeTile(n, p, v3s16(0,0,0), data);
1143                         TileSpec tile_nocrack = tile;
1144                         tile_nocrack.material_flags &= ~MATERIAL_FLAG_CRACK;
1145
1146                         // Put wood the right way around in the posts
1147                         TileSpec tile_rot = tile;
1148                         tile_rot.rotation = 1;
1149
1150                         u16 l = getInteriorLight(n, 1, nodedef);
1151                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
1152
1153                         const f32 post_rad=(f32)BS/8;
1154                         const f32 bar_rad=(f32)BS/16;
1155                         const f32 bar_len=(f32)(BS/2)-post_rad;
1156
1157                         v3f pos = intToFloat(p, BS);
1158
1159                         // The post - always present
1160                         aabb3f post(-post_rad,-BS/2,-post_rad,post_rad,BS/2,post_rad);
1161                         post.MinEdge += pos;
1162                         post.MaxEdge += pos;
1163                         f32 postuv[24]={
1164                                         6/16.,6/16.,10/16.,10/16.,
1165                                         6/16.,6/16.,10/16.,10/16.,
1166                                         0/16.,0,4/16.,1,
1167                                         4/16.,0,8/16.,1,
1168                                         8/16.,0,12/16.,1,
1169                                         12/16.,0,16/16.,1};
1170                         makeCuboid(&collector, post, &tile_rot, 1, c, postuv);
1171
1172                         // Now a section of fence, +X, if there's a post there
1173                         v3s16 p2 = p;
1174                         p2.X++;
1175                         MapNode n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
1176                         const ContentFeatures *f2 = &nodedef->get(n2);
1177                         if(f2->drawtype == NDT_FENCELIKE)
1178                         {
1179                                 aabb3f bar(-bar_len+BS/2,-bar_rad+BS/4,-bar_rad,
1180                                                 bar_len+BS/2,bar_rad+BS/4,bar_rad);
1181                                 bar.MinEdge += pos;
1182                                 bar.MaxEdge += pos;
1183                                 f32 xrailuv[24]={
1184                                         0/16.,2/16.,16/16.,4/16.,
1185                                         0/16.,4/16.,16/16.,6/16.,
1186                                         6/16.,6/16.,8/16.,8/16.,
1187                                         10/16.,10/16.,12/16.,12/16.,
1188                                         0/16.,8/16.,16/16.,10/16.,
1189                                         0/16.,14/16.,16/16.,16/16.};
1190                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1191                                                 c, xrailuv);
1192                                 bar.MinEdge.Y -= BS/2;
1193                                 bar.MaxEdge.Y -= BS/2;
1194                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1195                                                 c, xrailuv);
1196                         }
1197
1198                         // Now a section of fence, +Z, if there's a post there
1199                         p2 = p;
1200                         p2.Z++;
1201                         n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
1202                         f2 = &nodedef->get(n2);
1203                         if(f2->drawtype == NDT_FENCELIKE)
1204                         {
1205                                 aabb3f bar(-bar_rad,-bar_rad+BS/4,-bar_len+BS/2,
1206                                                 bar_rad,bar_rad+BS/4,bar_len+BS/2);
1207                                 bar.MinEdge += pos;
1208                                 bar.MaxEdge += pos;
1209                                 f32 zrailuv[24]={
1210                                         3/16.,1/16.,5/16.,5/16., // cannot rotate; stretch
1211                                         4/16.,1/16.,6/16.,5/16., // for wood texture instead
1212                                         0/16.,9/16.,16/16.,11/16.,
1213                                         0/16.,6/16.,16/16.,8/16.,
1214                                         6/16.,6/16.,8/16.,8/16.,
1215                                         10/16.,10/16.,12/16.,12/16.};
1216                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1217                                                 c, zrailuv);
1218                                 bar.MinEdge.Y -= BS/2;
1219                                 bar.MaxEdge.Y -= BS/2;
1220                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1221                                                 c, zrailuv);
1222                         }
1223                 break;}
1224                 case NDT_RAILLIKE:
1225                 {
1226                         bool is_rail_x [] = { false, false };  /* x-1, x+1 */
1227                         bool is_rail_z [] = { false, false };  /* z-1, z+1 */
1228
1229                         bool is_rail_z_minus_y [] = { false, false };  /* z-1, z+1; y-1 */
1230                         bool is_rail_x_minus_y [] = { false, false };  /* x-1, z+1; y-1 */
1231                         bool is_rail_z_plus_y [] = { false, false };  /* z-1, z+1; y+1 */
1232                         bool is_rail_x_plus_y [] = { false, false };  /* x-1, x+1; y+1 */
1233
1234                         MapNode n_minus_x = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1,y,z));
1235                         MapNode n_plus_x = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1,y,z));
1236                         MapNode n_minus_z = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y,z-1));
1237                         MapNode n_plus_z = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y,z+1));
1238                         MapNode n_plus_x_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1, y+1, z));
1239                         MapNode n_plus_x_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1, y-1, z));
1240                         MapNode n_minus_x_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1, y+1, z));
1241                         MapNode n_minus_x_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1, y-1, z));
1242                         MapNode n_plus_z_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y+1, z+1));
1243                         MapNode n_minus_z_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y+1, z-1));
1244                         MapNode n_plus_z_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y-1, z+1));
1245                         MapNode n_minus_z_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y-1, z-1));
1246
1247                         content_t thiscontent = n.getContent();
1248                         std::string groupname = "connect_to_raillike"; // name of the group that enables connecting to raillike nodes of different kind
1249                         bool self_connect_to_raillike = ((ItemGroupList) nodedef->get(n).groups)[groupname] != 0;
1250
1251                         if ((nodedef->get(n_minus_x).drawtype == NDT_RAILLIKE
1252                                         && ((ItemGroupList) nodedef->get(n_minus_x).groups)[groupname] != 0
1253                                         && self_connect_to_raillike)
1254                                         || n_minus_x.getContent() == thiscontent)
1255                                 is_rail_x[0] = true;
1256
1257                         if ((nodedef->get(n_minus_x_minus_y).drawtype == NDT_RAILLIKE
1258                                         && ((ItemGroupList) nodedef->get(n_minus_x_minus_y).groups)[groupname] != 0
1259                                         && self_connect_to_raillike)
1260                                         || n_minus_x_minus_y.getContent() == thiscontent)
1261                                 is_rail_x_minus_y[0] = true;
1262
1263                         if ((nodedef->get(n_minus_x_plus_y).drawtype == NDT_RAILLIKE
1264                                         && ((ItemGroupList) nodedef->get(n_minus_x_plus_y).groups)[groupname] != 0
1265                                         && self_connect_to_raillike)
1266                                         || n_minus_x_plus_y.getContent() == thiscontent)
1267                                 is_rail_x_plus_y[0] = true;
1268
1269                         if ((nodedef->get(n_plus_x).drawtype == NDT_RAILLIKE
1270                                         && ((ItemGroupList) nodedef->get(n_plus_x).groups)[groupname] != 0
1271                                         && self_connect_to_raillike)
1272                                         || n_plus_x.getContent() == thiscontent)
1273                                 is_rail_x[1] = true;
1274
1275                         if ((nodedef->get(n_plus_x_minus_y).drawtype == NDT_RAILLIKE
1276                                         && ((ItemGroupList) nodedef->get(n_plus_x_minus_y).groups)[groupname] != 0
1277                                         && self_connect_to_raillike)
1278                                         || n_plus_x_minus_y.getContent() == thiscontent)
1279                                 is_rail_x_minus_y[1] = true;
1280
1281                         if ((nodedef->get(n_plus_x_plus_y).drawtype == NDT_RAILLIKE
1282                                         && ((ItemGroupList) nodedef->get(n_plus_x_plus_y).groups)[groupname] != 0
1283                                         && self_connect_to_raillike)
1284                                         || n_plus_x_plus_y.getContent() == thiscontent)
1285                                 is_rail_x_plus_y[1] = true;
1286
1287                         if ((nodedef->get(n_minus_z).drawtype == NDT_RAILLIKE
1288                                         && ((ItemGroupList) nodedef->get(n_minus_z).groups)[groupname] != 0
1289                                         && self_connect_to_raillike)
1290                                         || n_minus_z.getContent() == thiscontent)
1291                                 is_rail_z[0] = true;
1292
1293                         if ((nodedef->get(n_minus_z_minus_y).drawtype == NDT_RAILLIKE
1294                                         && ((ItemGroupList) nodedef->get(n_minus_z_minus_y).groups)[groupname] != 0
1295                                         && self_connect_to_raillike)
1296                                         || n_minus_z_minus_y.getContent() == thiscontent)
1297                                 is_rail_z_minus_y[0] = true;
1298
1299                         if ((nodedef->get(n_minus_z_plus_y).drawtype == NDT_RAILLIKE
1300                                         && ((ItemGroupList) nodedef->get(n_minus_z_plus_y).groups)[groupname] != 0
1301                                         && self_connect_to_raillike)
1302                                         || n_minus_z_plus_y.getContent() == thiscontent)
1303                                 is_rail_z_plus_y[0] = true;
1304
1305                         if ((nodedef->get(n_plus_z).drawtype == NDT_RAILLIKE
1306                                         && ((ItemGroupList) nodedef->get(n_plus_z).groups)[groupname] != 0
1307                                         && self_connect_to_raillike)
1308                                         || n_plus_z.getContent() == thiscontent)
1309                                 is_rail_z[1] = true;
1310
1311                         if ((nodedef->get(n_plus_z_minus_y).drawtype == NDT_RAILLIKE
1312                                         && ((ItemGroupList) nodedef->get(n_plus_z_minus_y).groups)[groupname] != 0
1313                                         && self_connect_to_raillike)
1314                                         || n_plus_z_minus_y.getContent() == thiscontent)
1315                                 is_rail_z_minus_y[1] = true;
1316
1317                         if ((nodedef->get(n_plus_z_plus_y).drawtype == NDT_RAILLIKE
1318                                         && ((ItemGroupList) nodedef->get(n_plus_z_plus_y).groups)[groupname] != 0
1319                                         && self_connect_to_raillike)
1320                                         || n_plus_z_plus_y.getContent() == thiscontent)
1321                                 is_rail_z_plus_y[1] = true;
1322
1323                         bool is_rail_x_all[] = {false, false};
1324                         bool is_rail_z_all[] = {false, false};
1325                         is_rail_x_all[0]=is_rail_x[0] || is_rail_x_minus_y[0] || is_rail_x_plus_y[0];
1326                         is_rail_x_all[1]=is_rail_x[1] || is_rail_x_minus_y[1] || is_rail_x_plus_y[1];
1327                         is_rail_z_all[0]=is_rail_z[0] || is_rail_z_minus_y[0] || is_rail_z_plus_y[0];
1328                         is_rail_z_all[1]=is_rail_z[1] || is_rail_z_minus_y[1] || is_rail_z_plus_y[1];
1329
1330                         // reasonable default, flat straight unrotated rail
1331                         bool is_straight = true;
1332                         int adjacencies = 0;
1333                         int angle = 0;
1334                         u8 tileindex = 0;
1335
1336                         // check for sloped rail
1337                         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])
1338                         {
1339                                 adjacencies = 5; //5 means sloped
1340                                 is_straight = true; // sloped is always straight
1341                         }
1342                         else
1343                         {
1344                                 // is really straight, rails on both sides
1345                                 is_straight = (is_rail_x_all[0] && is_rail_x_all[1]) || (is_rail_z_all[0] && is_rail_z_all[1]);
1346                                 adjacencies = is_rail_x_all[0] + is_rail_x_all[1] + is_rail_z_all[0] + is_rail_z_all[1];
1347                         }
1348
1349                         switch (adjacencies) {
1350                         case 1:
1351                                 if(is_rail_x_all[0] || is_rail_x_all[1])
1352                                         angle = 90;
1353                                 break;
1354                         case 2:
1355                                 if(!is_straight)
1356                                         tileindex = 1; // curved
1357                                 if(is_rail_x_all[0] && is_rail_x_all[1])
1358                                         angle = 90;
1359                                 if(is_rail_z_all[0] && is_rail_z_all[1]){
1360                                         if (is_rail_z_plus_y[0])
1361                                                 angle = 180;
1362                                 }
1363                                 else if(is_rail_x_all[0] && is_rail_z_all[0])
1364                                         angle = 270;
1365                                 else if(is_rail_x_all[0] && is_rail_z_all[1])
1366                                         angle = 180;
1367                                 else if(is_rail_x_all[1] && is_rail_z_all[1])
1368                                         angle = 90;
1369                                 break;
1370                         case 3:
1371                                 // here is where the potential to 'switch' a junction is, but not implemented at present
1372                                 tileindex = 2; // t-junction
1373                                 if(!is_rail_x_all[1])
1374                                         angle=180;
1375                                 if(!is_rail_z_all[0])
1376                                         angle=90;
1377                                 if(!is_rail_z_all[1])
1378                                         angle=270;
1379                                 break;
1380                         case 4:
1381                                 tileindex = 3; // crossing
1382                                 break;
1383                         case 5: //sloped
1384                                 if(is_rail_z_plus_y[0])
1385                                         angle = 180;
1386                                 if(is_rail_x_plus_y[0])
1387                                         angle = 90;
1388                                 if(is_rail_x_plus_y[1])
1389                                         angle = -90;
1390                                 break;
1391                         default:
1392                                 break;
1393                         }
1394
1395                         TileSpec tile = getNodeTileN(n, p, tileindex, data);
1396                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
1397                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
1398
1399                         u16 l = getInteriorLight(n, 0, nodedef);
1400                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
1401
1402                         float d = (float)BS/64;
1403
1404                         char g=-1;
1405                         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])
1406                                 g=1; //Object is at a slope
1407
1408                         video::S3DVertex vertices[4] =
1409                         {
1410                                         video::S3DVertex(-BS/2,-BS/2+d,-BS/2, 0,0,0, c, 0,1),
1411                                         video::S3DVertex(BS/2,-BS/2+d,-BS/2, 0,0,0, c, 1,1),
1412                                         video::S3DVertex(BS/2,g*BS/2+d,BS/2, 0,0,0, c, 1,0),
1413                                         video::S3DVertex(-BS/2,g*BS/2+d,BS/2, 0,0,0, c, 0,0),
1414                         };
1415
1416                         for(s32 i=0; i<4; i++)
1417                         {
1418                                 if(angle != 0)
1419                                         vertices[i].Pos.rotateXZBy(angle);
1420                                 vertices[i].Pos += intToFloat(p, BS);
1421                         }
1422
1423                         u16 indices[] = {0,1,2,2,3,0};
1424                         collector.append(tile, vertices, 4, indices, 6);
1425                 break;}
1426                 case NDT_NODEBOX:
1427                 {
1428                         static const v3s16 tile_dirs[6] = {
1429                                 v3s16(0, 1, 0),
1430                                 v3s16(0, -1, 0),
1431                                 v3s16(1, 0, 0),
1432                                 v3s16(-1, 0, 0),
1433                                 v3s16(0, 0, 1),
1434                                 v3s16(0, 0, -1)
1435                         };
1436                         TileSpec tiles[6];
1437
1438                         u16 l = getInteriorLight(n, 1, nodedef);
1439                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
1440
1441                         v3f pos = intToFloat(p, BS);
1442
1443                         std::vector<aabb3f> boxes = n.getNodeBoxes(nodedef);
1444                         for(std::vector<aabb3f>::iterator
1445                                         i = boxes.begin();
1446                                         i != boxes.end(); i++)
1447                         {
1448                         for(int j = 0; j < 6; j++)
1449                                 {
1450                                 // Handles facedir rotation for textures
1451                                 tiles[j] = getNodeTile(n, p, tile_dirs[j], data);
1452                                 }
1453                                 aabb3f box = *i;
1454                                 box.MinEdge += pos;
1455                                 box.MaxEdge += pos;
1456
1457                                 f32 temp;
1458                                 if (box.MinEdge.X > box.MaxEdge.X)
1459                                 {
1460                                         temp=box.MinEdge.X;
1461                                         box.MinEdge.X=box.MaxEdge.X;
1462                                         box.MaxEdge.X=temp;
1463                                 }
1464                                 if (box.MinEdge.Y > box.MaxEdge.Y)
1465                                 {
1466                                         temp=box.MinEdge.Y;
1467                                         box.MinEdge.Y=box.MaxEdge.Y;
1468                                         box.MaxEdge.Y=temp;
1469                                 }
1470                                 if (box.MinEdge.Z > box.MaxEdge.Z)
1471                                 {
1472                                         temp=box.MinEdge.Z;
1473                                         box.MinEdge.Z=box.MaxEdge.Z;
1474                                         box.MaxEdge.Z=temp;
1475                                 }
1476
1477                                 //
1478                                 // Compute texture coords
1479                                 f32 tx1 = (box.MinEdge.X/BS)+0.5;
1480                                 f32 ty1 = (box.MinEdge.Y/BS)+0.5;
1481                                 f32 tz1 = (box.MinEdge.Z/BS)+0.5;
1482                                 f32 tx2 = (box.MaxEdge.X/BS)+0.5;
1483                                 f32 ty2 = (box.MaxEdge.Y/BS)+0.5;
1484                                 f32 tz2 = (box.MaxEdge.Z/BS)+0.5;
1485                                 f32 txc[24] = {
1486                                         // up
1487                                         tx1, 1-tz2, tx2, 1-tz1,
1488                                         // down
1489                                         tx1, tz1, tx2, tz2,
1490                                         // right
1491                                         tz1, 1-ty2, tz2, 1-ty1,
1492                                         // left
1493                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
1494                                         // back
1495                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
1496                                         // front
1497                                         tx1, 1-ty2, tx2, 1-ty1,
1498                                 };
1499                                 makeCuboid(&collector, box, tiles, 6, c, txc);
1500                         }
1501                 break;}
1502                 }
1503         }
1504 }
1505