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                                         video::S3DVertex(-BS/2,-BS/2,BS/2, 0,0,0, c,
 745                                                 ap.x0(), ap.y1()),
 746                                         video::S3DVertex(BS/2,-BS/2,BS/2, 0,0,0, c,
 747                                                 ap.x1(), ap.y1()),
 748                                         video::S3DVertex(BS/2,BS/2,BS/2, 0,0,0, c,
 749                                                 ap.x1(), ap.y0()),
 750                                         video::S3DVertex(-BS/2,BS/2,BS/2, 0,0,0, c,
 751                                                 ap.x0(), ap.y0()),
 752                                 };
 753
 754                                 // Rotations in the g_6dirs format
 755                                 if(j == 0) // Z+
 756                                         for(u16 i=0; i<4; i++)
 757                                                 vertices[i].Pos.rotateXZBy(0);
 758                                 else if(j == 1) // Y+
 759                                         for(u16 i=0; i<4; i++)
 760                                                 vertices[i].Pos.rotateYZBy(-90);
 761                                 else if(j == 2) // X+
 762                                         for(u16 i=0; i<4; i++)
 763                                                 vertices[i].Pos.rotateXZBy(-90);
 764                                 else if(j == 3) // Z-
 765                                         for(u16 i=0; i<4; i++)
 766                                                 vertices[i].Pos.rotateXZBy(180);
 767                                 else if(j == 4) // Y-
 768                                         for(u16 i=0; i<4; i++)
 769                                                 vertices[i].Pos.rotateYZBy(90);
 770                                 else if(j == 5) // X-
 771                                         for(u16 i=0; i<4; i++)
 772                                                 vertices[i].Pos.rotateXZBy(90);
 773
 774                                 for(u16 i=0; i<4; i++){
 775                                         vertices[i].Pos += intToFloat(p, BS);
 776                                 }
 777
 778                                 u16 indices[] = {0,1,2,2,3,0};
 779                                 // Add to mesh collector
 780                                 collector.append(tile, vertices, 4, indices, 6);
 781                         }
 782                 break;}
 783                 case NDT_GLASSLIKE_FRAMED:
 784                 {
 785                         static const v3s16 dirs[6] = {
 786                                 v3s16( 0, 1, 0),
 787                                 v3s16( 0,-1, 0),
 788                                 v3s16( 1, 0, 0),
 789                                 v3s16(-1, 0, 0),
 790                                 v3s16( 0, 0, 1),
 791                                 v3s16( 0, 0,-1)
 792                         };
 793                         TileSpec tiles[2];
 794                         tiles[0] = getNodeTile(n, p, dirs[0], data);
 795                         tiles[1] = getNodeTile(n, p, dirs[1], data);
 796                         u16 l = getInteriorLight(n, 1, data);
 797                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 798                         v3f pos = intToFloat(p, BS);
 799                         static const float a=BS/2;
 800                         static const float b=.876*(BS/2);
 801                         static const aabb3f frame_edges[12] = {
 802                                 aabb3f( b, b,-a, a, a, a), // y+
 803                                 aabb3f(-a, b,-a,-b, a, a), // y+
 804                                 aabb3f( b,-a,-a, a,-b, a), // y-
 805                                 aabb3f(-a,-a,-a,-b,-b, a), // y-
 806                                 aabb3f( b,-a, b, a, a, a), // x+
 807                                 aabb3f( b,-a,-a, a, a,-b), // x+
 808                                 aabb3f(-a,-a, b,-b, a, a), // x-
 809                                 aabb3f(-a,-a,-a,-b, a,-b), // x-
 810                                 aabb3f(-a, b, b, a, a, a), // z+
 811                                 aabb3f(-a,-a, b, a,-b, a), // z+
 812                                 aabb3f(-a,-a,-a, a,-b,-b), // z-
 813                                 aabb3f(-a, b,-a, a, a,-b)  // z-
 814                         };
 815                         aabb3f glass_faces[6] = {
 816                                 aabb3f(-a, a,-a, a, a, a), // y+
 817                                 aabb3f(-a,-a,-a, a,-a, a), // y-
 818                                 aabb3f( a,-a,-a, a, a, a), // x+
 819                                 aabb3f(-a,-a,-a,-a, a, a), // x-
 820                                 aabb3f(-a,-a, a, a, a, a), // z+
 821                                 aabb3f(-a,-a,-a, a, a,-a)  // z-
 822                         };
 823
 824                         int visible_faces[6] = {0,0,0,0,0,0};
 825                         int nb[18] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
 826                         u8 i;
 827                         content_t current = n.getContent();
 828                         content_t content;
 829                         MapNode n2;
 830                         v3s16 n2p;
 831                         for(i=0; i<18; i++)
 832                         {
 833                                 n2p = blockpos_nodes + p + g_26dirs[i];
 834                                 n2 = data->m_vmanip.getNodeNoEx(n2p);
 835                                 content_t n2c = n2.getContent();
 836                                 //TODO: remove CONTENT_IGNORE check when getNodeNoEx is fixed
 837                                 if (n2c == current || n2c == CONTENT_IGNORE)
 838                                         nb[i]=1;
 839                         }
 840                         for(i=0; i<6; i++)
 841                         {
 842                                 n2p = blockpos_nodes + p + dirs[i];
 843                                 n2 = data->m_vmanip.getNodeNoEx(n2p);
 844                                 content = n2.getContent();
 845                                 const ContentFeatures &f2 = nodedef->get(content);
 846                                 if (content == CONTENT_AIR || f2.isLiquid())
 847                                         visible_faces[i]=1;
 848                         }
 849                         static const u8 nb_triplet[12*3] = {
 850                                 1,2, 7,  1,5, 6,  4,2,15,  4,5,14,
 851                                 2,0,11,  2,3,13,  5,0,10,  5,3,12,
 852                                 0,1, 8,  0,4,16,  3,4,17,  3,1, 9
 853                         };
 854
 855                         f32 tx1,ty1,tz1,tx2,ty2,tz2;
 856                         aabb3f box;
 857                         for(i=0; i<12; i++)
 858                         {
 859                                 int edge_invisible;
 860                                 if (nb[nb_triplet[i*3+2]]==1)
 861                                         edge_invisible=nb[nb_triplet[i*3]] & nb[nb_triplet[i*3+1]];
 862                                 else
 863                                         edge_invisible=nb[nb_triplet[i*3]] ^ nb[nb_triplet[i*3+1]];
 864                                 if (edge_invisible)
 865                                         continue;
 866                                 box=frame_edges[i];
 867                                 box.MinEdge += pos;
 868                                 box.MaxEdge += pos;
 869                                 tx1 = (box.MinEdge.X/BS)+0.5;
 870                                 ty1 = (box.MinEdge.Y/BS)+0.5;
 871                                 tz1 = (box.MinEdge.Z/BS)+0.5;
 872                                 tx2 = (box.MaxEdge.X/BS)+0.5;
 873                                 ty2 = (box.MaxEdge.Y/BS)+0.5;
 874                                 tz2 = (box.MaxEdge.Z/BS)+0.5;
 875                                 f32 txc1[24] = {
 876                                         tx1,   1-tz2,   tx2, 1-tz1,
 877                                         tx1,     tz1,   tx2,   tz2,
 878                                         tz1,   1-ty2,   tz2, 1-ty1,
 879                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
 880                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
 881                                         tx1,   1-ty2,   tx2, 1-ty1,
 882                                 };
 883                                 makeCuboid(&collector, box, &tiles[0], 1, c, txc1);
 884                         }
 885                         for(i=0; i<6; i++)
 886                         {
 887                                 if (visible_faces[i]==0)
 888                                         continue;
 889                                 box=glass_faces[i];
 890                                 box.MinEdge += pos;
 891                                 box.MaxEdge += pos;
 892                                 tx1 = (box.MinEdge.X/BS)+0.5;
 893                                 ty1 = (box.MinEdge.Y/BS)+0.5;
 894                                 tz1 = (box.MinEdge.Z/BS)+0.5;
 895                                 tx2 = (box.MaxEdge.X/BS)+0.5;
 896                                 ty2 = (box.MaxEdge.Y/BS)+0.5;
 897                                 tz2 = (box.MaxEdge.Z/BS)+0.5;
 898                                 f32 txc2[24] = {
 899                                         tx1,   1-tz2,   tx2, 1-tz1,
 900                                         tx1,     tz1,   tx2,   tz2,
 901                                         tz1,   1-ty2,   tz2, 1-ty1,
 902                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
 903                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
 904                                         tx1,   1-ty2,   tx2, 1-ty1,
 905                                 };
 906                                 makeCuboid(&collector, box, &tiles[1], 1, c, txc2);
 907                         }
 908                 break;}
 909                 case NDT_ALLFACES:
 910                 {
 911                         TileSpec tile_leaves = getNodeTile(n, p,
 912                                         v3s16(0,0,0), data);
 913                         AtlasPointer pa_leaves = tile_leaves.texture;
 914
 915                         u16 l = getInteriorLight(n, 1, data);
 916                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 917
 918                         v3f pos = intToFloat(p, BS);
 919                         aabb3f box(-BS/2,-BS/2,-BS/2,BS/2,BS/2,BS/2);
 920                         box.MinEdge += pos;
 921                         box.MaxEdge += pos;
 922                         makeCuboid(&collector, box, &tile_leaves, 1, c, NULL);
 923                 break;}
 924                 case NDT_ALLFACES_OPTIONAL:
 925                         // This is always pre-converted to something else
 926                         assert(0);
 927                         break;
 928                 case NDT_TORCHLIKE:
 929                 {
 930                         v3s16 dir = n.getWallMountedDir(nodedef);
 931
 932                         u8 tileindex = 0;
 933                         if(dir == v3s16(0,-1,0)){
 934                                 tileindex = 0; // floor
 935                         } else if(dir == v3s16(0,1,0)){
 936                                 tileindex = 1; // ceiling
 937                         // For backwards compatibility
 938                         } else if(dir == v3s16(0,0,0)){
 939                                 tileindex = 0; // floor
 940                         } else {
 941                                 tileindex = 2; // side
 942                         }
 943
 944                         TileSpec tile = getNodeTileN(n, p, tileindex, data);
 945                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
 946                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
 947
 948                         AtlasPointer ap = tile.texture;
 949
 950                         u16 l = getInteriorLight(n, 1, data);
 951                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 952
 953                         // Wall at X+ of node
 954                         video::S3DVertex vertices[4] =
 955                         {
 956                                 video::S3DVertex(-BS/2,-BS/2,0, 0,0,0, c,
 957                                                 ap.x0(), ap.y1()),
 958                                 video::S3DVertex(BS/2,-BS/2,0, 0,0,0, c,
 959                                                 ap.x1(), ap.y1()),
 960                                 video::S3DVertex(BS/2,BS/2,0, 0,0,0, c,
 961                                                 ap.x1(), ap.y0()),
 962                                 video::S3DVertex(-BS/2,BS/2,0, 0,0,0, c,
 963                                                 ap.x0(), ap.y0()),
 964                         };
 965
 966                         for(s32 i=0; i<4; i++)
 967                         {
 968                                 if(dir == v3s16(1,0,0))
 969                                         vertices[i].Pos.rotateXZBy(0);
 970                                 if(dir == v3s16(-1,0,0))
 971                                         vertices[i].Pos.rotateXZBy(180);
 972                                 if(dir == v3s16(0,0,1))
 973                                         vertices[i].Pos.rotateXZBy(90);
 974                                 if(dir == v3s16(0,0,-1))
 975                                         vertices[i].Pos.rotateXZBy(-90);
 976                                 if(dir == v3s16(0,-1,0))
 977                                         vertices[i].Pos.rotateXZBy(45);
 978                                 if(dir == v3s16(0,1,0))
 979                                         vertices[i].Pos.rotateXZBy(-45);
 980
 981                                 vertices[i].Pos += intToFloat(p, BS);
 982                         }
 983
 984                         u16 indices[] = {0,1,2,2,3,0};
 985                         // Add to mesh collector
 986                         collector.append(tile, vertices, 4, indices, 6);
 987                 break;}
 988                 case NDT_SIGNLIKE:
 989                 {
 990                         TileSpec tile = getNodeTileN(n, p, 0, data);
 991                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
 992                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
 993                         AtlasPointer ap = tile.texture;
 994
 995                         u16 l = getInteriorLight(n, 0, data);
 996                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
 997
 998                         float d = (float)BS/16;
 999                         // Wall at X+ of node
1000                         video::S3DVertex vertices[4] =
1001                         {
1002                                 video::S3DVertex(BS/2-d,BS/2,BS/2, 0,0,0, c,
1003                                                 ap.x0(), ap.y0()),
1004                                 video::S3DVertex(BS/2-d,BS/2,-BS/2, 0,0,0, c,
1005                                                 ap.x1(), ap.y0()),
1006                                 video::S3DVertex(BS/2-d,-BS/2,-BS/2, 0,0,0, c,
1007                                                 ap.x1(), ap.y1()),
1008                                 video::S3DVertex(BS/2-d,-BS/2,BS/2, 0,0,0, c,
1009                                                 ap.x0(), ap.y1()),
1010                         };
1011
1012                         v3s16 dir = n.getWallMountedDir(nodedef);
1013
1014                         for(s32 i=0; i<4; i++)
1015                         {
1016                                 if(dir == v3s16(1,0,0))
1017                                         vertices[i].Pos.rotateXZBy(0);
1018                                 if(dir == v3s16(-1,0,0))
1019                                         vertices[i].Pos.rotateXZBy(180);
1020                                 if(dir == v3s16(0,0,1))
1021                                         vertices[i].Pos.rotateXZBy(90);
1022                                 if(dir == v3s16(0,0,-1))
1023                                         vertices[i].Pos.rotateXZBy(-90);
1024                                 if(dir == v3s16(0,-1,0))
1025                                         vertices[i].Pos.rotateXYBy(-90);
1026                                 if(dir == v3s16(0,1,0))
1027                                         vertices[i].Pos.rotateXYBy(90);
1028
1029                                 vertices[i].Pos += intToFloat(p, BS);
1030                         }
1031
1032                         u16 indices[] = {0,1,2,2,3,0};
1033                         // Add to mesh collector
1034                         collector.append(tile, vertices, 4, indices, 6);
1035                 break;}
1036                 case NDT_PLANTLIKE:
1037                 {
1038                         TileSpec tile = getNodeTileN(n, p, 0, data);
1039                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
1040                         AtlasPointer ap = tile.texture;
1041
1042                         u16 l = getInteriorLight(n, 1, data);
1043                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
1044
1045                         for(u32 j=0; j<2; j++)
1046                         {
1047                                 video::S3DVertex vertices[4] =
1048                                 {
1049                                         video::S3DVertex(-BS/2*f.visual_scale,-BS/2,0, 0,0,0, c,
1050                                                 ap.x0(), ap.y1()),
1051                                         video::S3DVertex( BS/2*f.visual_scale,-BS/2,0, 0,0,0, c,
1052                                                 ap.x1(), ap.y1()),
1053                                         video::S3DVertex( BS/2*f.visual_scale,
1054                                                 -BS/2 + f.visual_scale*BS,0, 0,0,0, c,
1055                                                 ap.x1(), ap.y0()),
1056                                         video::S3DVertex(-BS/2*f.visual_scale,
1057                                                 -BS/2 + f.visual_scale*BS,0, 0,0,0, c,
1058                                                 ap.x0(), ap.y0()),
1059                                 };
1060
1061                                 if(j == 0)
1062                                 {
1063                                         for(u16 i=0; i<4; i++)
1064                                                 vertices[i].Pos.rotateXZBy(45);
1065                                 }
1066                                 else if(j == 1)
1067                                 {
1068                                         for(u16 i=0; i<4; i++)
1069                                                 vertices[i].Pos.rotateXZBy(-45);
1070                                 }
1071
1072                                 for(u16 i=0; i<4; i++)
1073                                 {
1074                                         vertices[i].Pos *= f.visual_scale;
1075                                         vertices[i].Pos += intToFloat(p, BS);
1076                                 }
1077
1078                                 u16 indices[] = {0,1,2,2,3,0};
1079                                 // Add to mesh collector
1080                                 collector.append(tile, vertices, 4, indices, 6);
1081                         }
1082                 break;}
1083                 case NDT_FENCELIKE:
1084                 {
1085                         TileSpec tile = getNodeTile(n, p, v3s16(0,0,0), data);
1086                         TileSpec tile_nocrack = tile;
1087                         tile_nocrack.material_flags &= ~MATERIAL_FLAG_CRACK;
1088
1089                         // A hack to put wood the right way around in the posts
1090                         ITextureSource *tsrc = data->m_gamedef->tsrc();
1091                         TileSpec tile_rot = tile;
1092                         tile_rot.texture = tsrc->getTexture(tsrc->getTextureName(
1093                                         tile.texture.id) + "^[transformR90");
1094
1095                         u16 l = getInteriorLight(n, 1, data);
1096                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
1097
1098                         const f32 post_rad=(f32)BS/8;
1099                         const f32 bar_rad=(f32)BS/16;
1100                         const f32 bar_len=(f32)(BS/2)-post_rad;
1101
1102                         v3f pos = intToFloat(p, BS);
1103
1104                         // The post - always present
1105                         aabb3f post(-post_rad,-BS/2,-post_rad,post_rad,BS/2,post_rad);
1106                         post.MinEdge += pos;
1107                         post.MaxEdge += pos;
1108                         f32 postuv[24]={
1109                                         6/16.,6/16.,10/16.,10/16.,
1110                                         6/16.,6/16.,10/16.,10/16.,
1111                                         0/16.,0,4/16.,1,
1112                                         4/16.,0,8/16.,1,
1113                                         8/16.,0,12/16.,1,
1114                                         12/16.,0,16/16.,1};
1115                         makeCuboid(&collector, post, &tile_rot, 1, c, postuv);
1116
1117                         // Now a section of fence, +X, if there's a post there
1118                         v3s16 p2 = p;
1119                         p2.X++;
1120                         MapNode n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
1121                         const ContentFeatures *f2 = &nodedef->get(n2);
1122                         if(f2->drawtype == NDT_FENCELIKE)
1123                         {
1124                                 aabb3f bar(-bar_len+BS/2,-bar_rad+BS/4,-bar_rad,
1125                                                 bar_len+BS/2,bar_rad+BS/4,bar_rad);
1126                                 bar.MinEdge += pos;
1127                                 bar.MaxEdge += pos;
1128                                 f32 xrailuv[24]={
1129                                         0/16.,2/16.,16/16.,4/16.,
1130                                         0/16.,4/16.,16/16.,6/16.,
1131                                         6/16.,6/16.,8/16.,8/16.,
1132                                         10/16.,10/16.,12/16.,12/16.,
1133                                         0/16.,8/16.,16/16.,10/16.,
1134                                         0/16.,14/16.,16/16.,16/16.};
1135                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1136                                                 c, xrailuv);
1137                                 bar.MinEdge.Y -= BS/2;
1138                                 bar.MaxEdge.Y -= BS/2;
1139                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1140                                                 c, xrailuv);
1141                         }
1142
1143                         // Now a section of fence, +Z, if there's a post there
1144                         p2 = p;
1145                         p2.Z++;
1146                         n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
1147                         f2 = &nodedef->get(n2);
1148                         if(f2->drawtype == NDT_FENCELIKE)
1149                         {
1150                                 aabb3f bar(-bar_rad,-bar_rad+BS/4,-bar_len+BS/2,
1151                                                 bar_rad,bar_rad+BS/4,bar_len+BS/2);
1152                                 bar.MinEdge += pos;
1153                                 bar.MaxEdge += pos;
1154                                 f32 zrailuv[24]={
1155                                         3/16.,1/16.,5/16.,5/16., // cannot rotate; stretch
1156                                         4/16.,1/16.,6/16.,5/16., // for wood texture instead
1157                                         0/16.,9/16.,16/16.,11/16.,
1158                                         0/16.,6/16.,16/16.,8/16.,
1159                                         6/16.,6/16.,8/16.,8/16.,
1160                                         10/16.,10/16.,12/16.,12/16.};
1161                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1162                                                 c, zrailuv);
1163                                 bar.MinEdge.Y -= BS/2;
1164                                 bar.MaxEdge.Y -= BS/2;
1165                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1166                                                 c, zrailuv);
1167                         }
1168                 break;}
1169                 case NDT_RAILLIKE:
1170                 {
1171                         bool is_rail_x [] = { false, false };  /* x-1, x+1 */
1172                         bool is_rail_z [] = { false, false };  /* z-1, z+1 */
1173
1174                         bool is_rail_z_minus_y [] = { false, false };  /* z-1, z+1; y-1 */
1175                         bool is_rail_x_minus_y [] = { false, false };  /* x-1, z+1; y-1 */
1176                         bool is_rail_z_plus_y [] = { false, false };  /* z-1, z+1; y+1 */
1177                         bool is_rail_x_plus_y [] = { false, false };  /* x-1, x+1; y+1 */
1178
1179                         MapNode n_minus_x = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1,y,z));
1180                         MapNode n_plus_x = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1,y,z));
1181                         MapNode n_minus_z = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y,z-1));
1182                         MapNode n_plus_z = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y,z+1));
1183                         MapNode n_plus_x_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1, y+1, z));
1184                         MapNode n_plus_x_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1, y-1, z));
1185                         MapNode n_minus_x_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1, y+1, z));
1186                         MapNode n_minus_x_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1, y-1, z));
1187                         MapNode n_plus_z_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y+1, z+1));
1188                         MapNode n_minus_z_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y+1, z-1));
1189                         MapNode n_plus_z_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y-1, z+1));
1190                         MapNode n_minus_z_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y-1, z-1));
1191
1192                         content_t thiscontent = n.getContent();
1193                         std::string groupname = "connect_to_raillike"; // name of the group that enables connecting to raillike nodes of different kind
1194                         bool self_connect_to_raillike = ((ItemGroupList) nodedef->get(n).groups)[groupname] != 0;
1195
1196                         if ((nodedef->get(n_minus_x).drawtype == NDT_RAILLIKE
1197                                         && ((ItemGroupList) nodedef->get(n_minus_x).groups)[groupname] != 0
1198                                         && self_connect_to_raillike)
1199                                         || n_minus_x.getContent() == thiscontent)
1200                                 is_rail_x[0] = true;
1201
1202                         if ((nodedef->get(n_minus_x_minus_y).drawtype == NDT_RAILLIKE
1203                                         && ((ItemGroupList) nodedef->get(n_minus_x_minus_y).groups)[groupname] != 0
1204                                         && self_connect_to_raillike)
1205                                         || n_minus_x_minus_y.getContent() == thiscontent)
1206                                 is_rail_x_minus_y[0] = true;
1207
1208                         if ((nodedef->get(n_minus_x_plus_y).drawtype == NDT_RAILLIKE
1209                                         && ((ItemGroupList) nodedef->get(n_minus_x_plus_y).groups)[groupname] != 0
1210                                         && self_connect_to_raillike)
1211                                         || n_minus_x_plus_y.getContent() == thiscontent)
1212                                 is_rail_x_plus_y[0] = true;
1213
1214                         if ((nodedef->get(n_plus_x).drawtype == NDT_RAILLIKE
1215                                         && ((ItemGroupList) nodedef->get(n_plus_x).groups)[groupname] != 0
1216                                         && self_connect_to_raillike)
1217                                         || n_plus_x.getContent() == thiscontent)
1218                                 is_rail_x[1] = true;
1219
1220                         if ((nodedef->get(n_plus_x_minus_y).drawtype == NDT_RAILLIKE
1221                                         && ((ItemGroupList) nodedef->get(n_plus_x_minus_y).groups)[groupname] != 0
1222                                         && self_connect_to_raillike)
1223                                         || n_plus_x_minus_y.getContent() == thiscontent)
1224                                 is_rail_x_minus_y[1] = true;
1225
1226                         if ((nodedef->get(n_plus_x_plus_y).drawtype == NDT_RAILLIKE
1227                                         && ((ItemGroupList) nodedef->get(n_plus_x_plus_y).groups)[groupname] != 0
1228                                         && self_connect_to_raillike)
1229                                         || n_plus_x_plus_y.getContent() == thiscontent)
1230                                 is_rail_x_plus_y[1] = true;
1231
1232                         if ((nodedef->get(n_minus_z).drawtype == NDT_RAILLIKE
1233                                         && ((ItemGroupList) nodedef->get(n_minus_z).groups)[groupname] != 0
1234                                         && self_connect_to_raillike)
1235                                         || n_minus_z.getContent() == thiscontent)
1236                                 is_rail_z[0] = true;
1237
1238                         if ((nodedef->get(n_minus_z_minus_y).drawtype == NDT_RAILLIKE
1239                                         && ((ItemGroupList) nodedef->get(n_minus_z_minus_y).groups)[groupname] != 0
1240                                         && self_connect_to_raillike)
1241                                         || n_minus_z_minus_y.getContent() == thiscontent)
1242                                 is_rail_z_minus_y[0] = true;
1243
1244                         if ((nodedef->get(n_minus_z_plus_y).drawtype == NDT_RAILLIKE
1245                                         && ((ItemGroupList) nodedef->get(n_minus_z_plus_y).groups)[groupname] != 0
1246                                         && self_connect_to_raillike)
1247                                         || n_minus_z_plus_y.getContent() == thiscontent)
1248                                 is_rail_z_plus_y[0] = true;
1249
1250                         if ((nodedef->get(n_plus_z).drawtype == NDT_RAILLIKE
1251                                         && ((ItemGroupList) nodedef->get(n_plus_z).groups)[groupname] != 0
1252                                         && self_connect_to_raillike)
1253                                         || n_plus_z.getContent() == thiscontent)
1254                                 is_rail_z[1] = true;
1255
1256                         if ((nodedef->get(n_plus_z_minus_y).drawtype == NDT_RAILLIKE
1257                                         && ((ItemGroupList) nodedef->get(n_plus_z_minus_y).groups)[groupname] != 0
1258                                         && self_connect_to_raillike)
1259                                         || n_plus_z_minus_y.getContent() == thiscontent)
1260                                 is_rail_z_minus_y[1] = true;
1261
1262                         if ((nodedef->get(n_plus_z_plus_y).drawtype == NDT_RAILLIKE
1263                                         && ((ItemGroupList) nodedef->get(n_plus_z_plus_y).groups)[groupname] != 0
1264                                         && self_connect_to_raillike)
1265                                         || n_plus_z_plus_y.getContent() == thiscontent)
1266                                 is_rail_z_plus_y[1] = true;
1267
1268                         bool is_rail_x_all[] = {false, false};
1269                         bool is_rail_z_all[] = {false, false};
1270                         is_rail_x_all[0]=is_rail_x[0] || is_rail_x_minus_y[0] || is_rail_x_plus_y[0];
1271                         is_rail_x_all[1]=is_rail_x[1] || is_rail_x_minus_y[1] || is_rail_x_plus_y[1];
1272                         is_rail_z_all[0]=is_rail_z[0] || is_rail_z_minus_y[0] || is_rail_z_plus_y[0];
1273                         is_rail_z_all[1]=is_rail_z[1] || is_rail_z_minus_y[1] || is_rail_z_plus_y[1];
1274
1275                         // reasonable default, flat straight unrotated rail
1276                         bool is_straight = true;
1277                         int adjacencies = 0;
1278                         int angle = 0;
1279                         u8 tileindex = 0;
1280
1281                         // check for sloped rail
1282                         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])
1283                         {
1284                                 adjacencies = 5; //5 means sloped
1285                                 is_straight = true; // sloped is always straight
1286                         }
1287                         else
1288                         {
1289                                 // is really straight, rails on both sides
1290                                 is_straight = (is_rail_x_all[0] && is_rail_x_all[1]) || (is_rail_z_all[0] && is_rail_z_all[1]);
1291                                 adjacencies = is_rail_x_all[0] + is_rail_x_all[1] + is_rail_z_all[0] + is_rail_z_all[1];
1292                         }
1293
1294                         switch (adjacencies) {
1295                         case 1:
1296                                 if(is_rail_x_all[0] || is_rail_x_all[1])
1297                                         angle = 90;
1298                                 break;
1299                         case 2:
1300                                 if(!is_straight)
1301                                         tileindex = 1; // curved
1302                                 if(is_rail_x_all[0] && is_rail_x_all[1])
1303                                         angle = 90;
1304                                 if(is_rail_z_all[0] && is_rail_z_all[1]){
1305                                         if (is_rail_z_plus_y[0])
1306                                                 angle = 180;
1307                                 }
1308                                 else if(is_rail_x_all[0] && is_rail_z_all[0])
1309                                         angle = 270;
1310                                 else if(is_rail_x_all[0] && is_rail_z_all[1])
1311                                         angle = 180;
1312                                 else if(is_rail_x_all[1] && is_rail_z_all[1])
1313                                         angle = 90;
1314                                 break;
1315                         case 3:
1316                                 // here is where the potential to 'switch' a junction is, but not implemented at present
1317                                 tileindex = 2; // t-junction
1318                                 if(!is_rail_x_all[1])
1319                                         angle=180;
1320                                 if(!is_rail_z_all[0])
1321                                         angle=90;
1322                                 if(!is_rail_z_all[1])
1323                                         angle=270;
1324                                 break;
1325                         case 4:
1326                                 tileindex = 3; // crossing
1327                                 break;
1328                         case 5: //sloped
1329                                 if(is_rail_z_plus_y[0])
1330                                         angle = 180;
1331                                 if(is_rail_x_plus_y[0])
1332                                         angle = 90;
1333                                 if(is_rail_x_plus_y[1])
1334                                         angle = -90;
1335                                 break;
1336                         default:
1337                                 break;
1338                         }
1339
1340                         TileSpec tile = getNodeTileN(n, p, tileindex, data);
1341                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
1342                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
1343
1344                         AtlasPointer ap = tile.texture;
1345
1346                         u16 l = getInteriorLight(n, 0, data);
1347                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
1348
1349                         float d = (float)BS/64;
1350
1351                         char g=-1;
1352                         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])
1353                                 g=1; //Object is at a slope
1354
1355                         video::S3DVertex vertices[4] =
1356                         {
1357                                         video::S3DVertex(-BS/2,-BS/2+d,-BS/2, 0,0,0, c,
1358                                                         ap.x0(), ap.y1()),
1359                                         video::S3DVertex(BS/2,-BS/2+d,-BS/2, 0,0,0, c,
1360                                                         ap.x1(), ap.y1()),
1361                                         video::S3DVertex(BS/2,g*BS/2+d,BS/2, 0,0,0, c,
1362                                                         ap.x1(), ap.y0()),
1363                                         video::S3DVertex(-BS/2,g*BS/2+d,BS/2, 0,0,0, c,
1364                                                         ap.x0(), ap.y0()),
1365                         };
1366
1367                         for(s32 i=0; i<4; i++)
1368                         {
1369                                 if(angle != 0)
1370                                         vertices[i].Pos.rotateXZBy(angle);
1371                                 vertices[i].Pos += intToFloat(p, BS);
1372                         }
1373
1374                         u16 indices[] = {0,1,2,2,3,0};
1375                         collector.append(tile, vertices, 4, indices, 6);
1376                 break;}
1377                 case NDT_NODEBOX:
1378                 {
1379                         static const v3s16 tile_dirs[6] = {
1380                                 v3s16(0, 1, 0),
1381                                 v3s16(0, -1, 0),
1382                                 v3s16(1, 0, 0),
1383                                 v3s16(-1, 0, 0),
1384                                 v3s16(0, 0, 1),
1385                                 v3s16(0, 0, -1)
1386                         };
1387                         TileSpec tiles[6];
1388
1389                         u16 l = getInteriorLight(n, 0, data);
1390                         video::SColor c = MapBlock_LightColor(255, l, decode_light(f.light_source));
1391
1392                         v3f pos = intToFloat(p, BS);
1393
1394                         std::vector<aabb3f> boxes = n.getNodeBoxes(nodedef);
1395                         for(std::vector<aabb3f>::iterator
1396                                         i = boxes.begin();
1397                                         i != boxes.end(); i++)
1398                         {
1399                         for(int j = 0; j < 6; j++)
1400                                 {
1401                                 // Handles facedir rotation for textures
1402                                 tiles[j] = getNodeTile(n, p, tile_dirs[j], data);
1403                                 }
1404                                 aabb3f box = *i;
1405                                 box.MinEdge += pos;
1406                                 box.MaxEdge += pos;
1407
1408                                 f32 temp;
1409                                 if (box.MinEdge.X > box.MaxEdge.X)
1410                                 {
1411                                         temp=box.MinEdge.X;
1412                                         box.MinEdge.X=box.MaxEdge.X;
1413                                         box.MaxEdge.X=temp;
1414                                 }
1415                                 if (box.MinEdge.Y > box.MaxEdge.Y)
1416                                 {
1417                                         temp=box.MinEdge.Y;
1418                                         box.MinEdge.Y=box.MaxEdge.Y;
1419                                         box.MaxEdge.Y=temp;
1420                                 }
1421                                 if (box.MinEdge.Z > box.MaxEdge.Z)
1422                                 {
1423                                         temp=box.MinEdge.Z;
1424                                         box.MinEdge.Z=box.MaxEdge.Z;
1425                                         box.MaxEdge.Z=temp;
1426                                 }
1427
1428                                 //
1429                                 // Compute texture coords
1430                                 f32 tx1 = (box.MinEdge.X/BS)+0.5;
1431                                 f32 ty1 = (box.MinEdge.Y/BS)+0.5;
1432                                 f32 tz1 = (box.MinEdge.Z/BS)+0.5;
1433                                 f32 tx2 = (box.MaxEdge.X/BS)+0.5;
1434                                 f32 ty2 = (box.MaxEdge.Y/BS)+0.5;
1435                                 f32 tz2 = (box.MaxEdge.Z/BS)+0.5;
1436                                 f32 txc[24] = {
1437                                         // up
1438                                         tx1, 1-tz2, tx2, 1-tz1,
1439                                         // down
1440                                         tx1, tz1, tx2, tz2,
1441                                         // right
1442                                         tz1, 1-ty2, tz2, 1-ty1,
1443                                         // left
1444                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
1445                                         // back
1446                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
1447                                         // front
1448                                         tx1, 1-ty2, tx2, 1-ty1,
1449                                 };
1450                                 makeCuboid(&collector, box, tiles, 6, c, txc);
1451                         }
1452                 break;}
1453                 }
1454         }
1455 }
1456