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         ITextureSource *tsrc = data->m_gamedef->tsrc();
 173
 174         // 0ms
 175         //TimeTaker timer("mapblock_mesh_generate_special()");
 176
 177         /*
 178                 Some settings
 179         */
 180         bool new_style_water = g_settings->getBool("new_style_water");
 181
 182         float node_liquid_level = 1.0;
 183         if (new_style_water)
 184                 node_liquid_level = 0.85;
 185
 186         v3s16 blockpos_nodes = data->m_blockpos*MAP_BLOCKSIZE;
 187
 188         // Create selection mesh
 189         v3s16 p = data->m_highlighted_pos_relative;
 190         if (data->m_show_hud &
 191                         (p.X >= 0) & (p.X < MAP_BLOCKSIZE) &
 192                         (p.Y >= 0) & (p.Y < MAP_BLOCKSIZE) &
 193                         (p.Z >= 0) & (p.Z < MAP_BLOCKSIZE)) {
 194
 195                 MapNode n = data->m_vmanip.getNodeNoEx(blockpos_nodes + p);
 196                 // Get selection mesh light level
 197                 static const v3s16 dirs[7] = {
 198                                 v3s16( 0, 0, 0),
 199                                 v3s16( 0, 1, 0),
 200                                 v3s16( 0,-1, 0),
 201                                 v3s16( 1, 0, 0),
 202                                 v3s16(-1, 0, 0),
 203                                 v3s16( 0, 0, 1),
 204                                 v3s16( 0, 0,-1)
 205                 };
 206
 207                 u16 l = 0;
 208                 u16 l1 = 0;
 209                 for (u8 i = 0; i < 7; i++) {
 210                         MapNode n1 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p + dirs[i]);
 211                         l1 = getInteriorLight(n1, -4, nodedef);
 212                         if (l1 > l)
 213                                 l = l1;
 214                 }
 215                 video::SColor c = MapBlock_LightColor(255, l, 0);
 216                 data->m_highlight_mesh_color = c;
 217                 std::vector<aabb3f> boxes = n.getSelectionBoxes(nodedef);
 218                 TileSpec h_tile;
 219                 h_tile.material_flags |= MATERIAL_FLAG_HIGHLIGHTED;
 220                 h_tile.texture = tsrc->getTexture("halo.png",&h_tile.texture_id);
 221                 v3f pos = intToFloat(p, BS);
 222                 f32 d = 0.05 * BS;
 223                 for(std::vector<aabb3f>::iterator
 224                                 i = boxes.begin();
 225                                 i != boxes.end(); i++)
 226                 {
 227                         aabb3f box = *i;
 228                         box.MinEdge += v3f(-d, -d, -d) + pos;
 229                         box.MaxEdge += v3f(d, d, d) + pos;
 230                         makeCuboid(&collector, box, &h_tile, 1, c, NULL);
 231                 }
 232         }
 233
 234         for(s16 z = 0; z < MAP_BLOCKSIZE; z++)
 235         for(s16 y = 0; y < MAP_BLOCKSIZE; y++)
 236         for(s16 x = 0; x < MAP_BLOCKSIZE; x++)
 237         {
 238                 v3s16 p(x,y,z);
 239
 240                 MapNode n = data->m_vmanip.getNodeNoEx(blockpos_nodes + p);
 241                 const ContentFeatures &f = nodedef->get(n);
 242
 243                 // Only solidness=0 stuff is drawn here
 244                 if(f.solidness != 0)
 245                         continue;
 246
 247                 switch(f.drawtype){
 248                 default:
 249                         infostream<<"Got "<<f.drawtype<<std::endl;
 250                         assert(0);
 251                         break;
 252                 case NDT_AIRLIKE:
 253                         break;
 254                 case NDT_LIQUID:
 255                 {
 256                         /*
 257                                 Add water sources to mesh if using new style
 258                         */
 259                         TileSpec tile_liquid = f.special_tiles[0];
 260                         TileSpec tile_liquid_bfculled = getNodeTile(n, p, v3s16(0,0,0), data);
 261
 262                         bool top_is_same_liquid = false;
 263                         MapNode ntop = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y+1,z));
 264                         content_t c_flowing = nodedef->getId(f.liquid_alternative_flowing);
 265                         content_t c_source = nodedef->getId(f.liquid_alternative_source);
 266                         if(ntop.getContent() == c_flowing || ntop.getContent() == c_source)
 267                                 top_is_same_liquid = true;
 268
 269                         u16 l = getInteriorLight(n, 0, nodedef);
 270                         video::SColor c = MapBlock_LightColor(f.alpha, l, f.light_source);
 271
 272                         /*
 273                                 Generate sides
 274                          */
 275                         v3s16 side_dirs[4] = {
 276                                 v3s16(1,0,0),
 277                                 v3s16(-1,0,0),
 278                                 v3s16(0,0,1),
 279                                 v3s16(0,0,-1),
 280                         };
 281                         for(u32 i=0; i<4; i++)
 282                         {
 283                                 v3s16 dir = side_dirs[i];
 284
 285                                 MapNode neighbor = data->m_vmanip.getNodeNoEx(blockpos_nodes + p + dir);
 286                                 content_t neighbor_content = neighbor.getContent();
 287                                 const ContentFeatures &n_feat = nodedef->get(neighbor_content);
 288                                 MapNode n_top = data->m_vmanip.getNodeNoEx(blockpos_nodes + p + dir+ v3s16(0,1,0));
 289                                 content_t n_top_c = n_top.getContent();
 290
 291                                 if(neighbor_content == CONTENT_IGNORE)
 292                                         continue;
 293
 294                                 /*
 295                                         If our topside is liquid and neighbor's topside
 296                                         is liquid, don't draw side face
 297                                 */
 298                                 if(top_is_same_liquid && (n_top_c == c_flowing ||
 299                                                 n_top_c == c_source || n_top_c == CONTENT_IGNORE))
 300                                         continue;
 301
 302                                 // Don't draw face if neighbor is blocking the view
 303                                 if(n_feat.solidness == 2)
 304                                         continue;
 305
 306                                 bool neighbor_is_same_liquid = (neighbor_content == c_source
 307                                                 || neighbor_content == c_flowing);
 308
 309                                 // Don't draw any faces if neighbor same is liquid and top is
 310                                 // same liquid
 311                                 if(neighbor_is_same_liquid && !top_is_same_liquid)
 312                                         continue;
 313
 314                                 // Use backface culled material if neighbor doesn't have a
 315                                 // solidness of 0
 316                                 const TileSpec *current_tile = &tile_liquid;
 317                                 if(n_feat.solidness != 0 || n_feat.visual_solidness != 0)
 318                                         current_tile = &tile_liquid_bfculled;
 319
 320                                 video::S3DVertex vertices[4] =
 321                                 {
 322                                         video::S3DVertex(-BS/2,0,BS/2,0,0,0, c, 0,1),
 323                                         video::S3DVertex(BS/2,0,BS/2,0,0,0, c, 1,1),
 324                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,0),
 325                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,0),
 326                                 };
 327
 328                                 /*
 329                                         If our topside is liquid, set upper border of face
 330                                         at upper border of node
 331                                 */
 332                                 if(top_is_same_liquid)
 333                                 {
 334                                         vertices[2].Pos.Y = 0.5*BS;
 335                                         vertices[3].Pos.Y = 0.5*BS;
 336                                 }
 337                                 /*
 338                                         Otherwise upper position of face is liquid level
 339                                 */
 340                                 else
 341                                 {
 342                                         vertices[2].Pos.Y = (node_liquid_level-0.5)*BS;
 343                                         vertices[3].Pos.Y = (node_liquid_level-0.5)*BS;
 344                                 }
 345                                 /*
 346                                         If neighbor is liquid, lower border of face is liquid level
 347                                 */
 348                                 if(neighbor_is_same_liquid)
 349                                 {
 350                                         vertices[0].Pos.Y = (node_liquid_level-0.5)*BS;
 351                                         vertices[1].Pos.Y = (node_liquid_level-0.5)*BS;
 352                                 }
 353                                 /*
 354                                         If neighbor is not liquid, lower border of face is
 355                                         lower border of node
 356                                 */
 357                                 else
 358                                 {
 359                                         vertices[0].Pos.Y = -0.5*BS;
 360                                         vertices[1].Pos.Y = -0.5*BS;
 361                                 }
 362
 363                                 for(s32 j=0; j<4; j++)
 364                                 {
 365                                         if(dir == v3s16(0,0,1))
 366                                                 vertices[j].Pos.rotateXZBy(0);
 367                                         if(dir == v3s16(0,0,-1))
 368                                                 vertices[j].Pos.rotateXZBy(180);
 369                                         if(dir == v3s16(-1,0,0))
 370                                                 vertices[j].Pos.rotateXZBy(90);
 371                                         if(dir == v3s16(1,0,-0))
 372                                                 vertices[j].Pos.rotateXZBy(-90);
 373
 374                                         // Do this to not cause glitches when two liquids are
 375                                         // side-by-side
 376                                         /*if(neighbor_is_same_liquid == false){
 377                                                 vertices[j].Pos.X *= 0.98;
 378                                                 vertices[j].Pos.Z *= 0.98;
 379                                         }*/
 380
 381                                         vertices[j].Pos += intToFloat(p, BS);
 382                                 }
 383
 384                                 u16 indices[] = {0,1,2,2,3,0};
 385                                 // Add to mesh collector
 386                                 collector.append(*current_tile, vertices, 4, indices, 6);
 387                         }
 388
 389                         /*
 390                                 Generate top
 391                          */
 392                         if(top_is_same_liquid)
 393                                 continue;
 394
 395                         video::S3DVertex vertices[4] =
 396                         {
 397                                 video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,1),
 398                                 video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,1),
 399                                 video::S3DVertex(BS/2,0,-BS/2, 0,0,0, c, 1,0),
 400                                 video::S3DVertex(-BS/2,0,-BS/2, 0,0,0, c, 0,0),
 401                         };
 402
 403                         v3f offset(p.X*BS, p.Y*BS + (-0.5+node_liquid_level)*BS, p.Z*BS);
 404                         for(s32 i=0; i<4; i++)
 405                         {
 406                                 vertices[i].Pos += offset;
 407                         }
 408
 409                         u16 indices[] = {0,1,2,2,3,0};
 410                         // Add to mesh collector
 411                         collector.append(tile_liquid, vertices, 4, indices, 6);
 412                 break;}
 413                 case NDT_FLOWINGLIQUID:
 414                 {
 415                         /*
 416                                 Add flowing liquid to mesh
 417                         */
 418                         TileSpec tile_liquid = f.special_tiles[0];
 419                         TileSpec tile_liquid_bfculled = f.special_tiles[1];
 420
 421                         bool top_is_same_liquid = false;
 422                         MapNode ntop = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y+1,z));
 423                         content_t c_flowing = nodedef->getId(f.liquid_alternative_flowing);
 424                         content_t c_source = nodedef->getId(f.liquid_alternative_source);
 425                         if(ntop.getContent() == c_flowing || ntop.getContent() == c_source)
 426                                 top_is_same_liquid = true;
 427
 428                         u16 l = 0;
 429                         // If this liquid emits light and doesn't contain light, draw
 430                         // it at what it emits, for an increased effect
 431                         u8 light_source = nodedef->get(n).light_source;
 432                         if(light_source != 0){
 433                                 l = decode_light(light_source);
 434                                 l = l | (l<<8);
 435                         }
 436                         // Use the light of the node on top if possible
 437                         else if(nodedef->get(ntop).param_type == CPT_LIGHT)
 438                                 l = getInteriorLight(ntop, 0, nodedef);
 439                         // Otherwise use the light of this node (the liquid)
 440                         else
 441                                 l = getInteriorLight(n, 0, nodedef);
 442                         video::SColor c = MapBlock_LightColor(f.alpha, l, f.light_source);
 443
 444                         u8 range = rangelim(nodedef->get(c_flowing).liquid_range, 1, 8);
 445
 446                         // Neighbor liquid levels (key = relative position)
 447                         // Includes current node
 448                         std::map<v3s16, f32> neighbor_levels;
 449                         std::map<v3s16, content_t> neighbor_contents;
 450                         std::map<v3s16, u8> neighbor_flags;
 451                         const u8 neighborflag_top_is_same_liquid = 0x01;
 452                         v3s16 neighbor_dirs[9] = {
 453                                 v3s16(0,0,0),
 454                                 v3s16(0,0,1),
 455                                 v3s16(0,0,-1),
 456                                 v3s16(1,0,0),
 457                                 v3s16(-1,0,0),
 458                                 v3s16(1,0,1),
 459                                 v3s16(-1,0,-1),
 460                                 v3s16(1,0,-1),
 461                                 v3s16(-1,0,1),
 462                         };
 463                         for(u32 i=0; i<9; i++)
 464                         {
 465                                 content_t content = CONTENT_AIR;
 466                                 float level = -0.5 * BS;
 467                                 u8 flags = 0;
 468                                 // Check neighbor
 469                                 v3s16 p2 = p + neighbor_dirs[i];
 470                                 MapNode n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
 471                                 if(n2.getContent() != CONTENT_IGNORE)
 472                                 {
 473                                         content = n2.getContent();
 474
 475                                         if(n2.getContent() == c_source)
 476                                                 level = (-0.5+node_liquid_level) * BS;
 477                                         else if(n2.getContent() == c_flowing){
 478                                                 u8 liquid_level = (n2.param2&LIQUID_LEVEL_MASK);
 479                                                 if (liquid_level <= LIQUID_LEVEL_MAX+1-range)
 480                                                         liquid_level = 0;
 481                                                 else
 482                                                         liquid_level -= (LIQUID_LEVEL_MAX+1-range);
 483                                                 level = (-0.5 + ((float)liquid_level+ 0.5) / (float)range * node_liquid_level) * BS;
 484                                         }
 485
 486                                         // Check node above neighbor.
 487                                         // NOTE: This doesn't get executed if neighbor
 488                                         //       doesn't exist
 489                                         p2.Y += 1;
 490                                         n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
 491                                         if(n2.getContent() == c_source ||
 492                                                         n2.getContent() == c_flowing)
 493                                                 flags |= neighborflag_top_is_same_liquid;
 494                                 }
 495
 496                                 neighbor_levels[neighbor_dirs[i]] = level;
 497                                 neighbor_contents[neighbor_dirs[i]] = content;
 498                                 neighbor_flags[neighbor_dirs[i]] = flags;
 499                         }
 500
 501                         // Corner heights (average between four liquids)
 502                         f32 corner_levels[4];
 503
 504                         v3s16 halfdirs[4] = {
 505                                 v3s16(0,0,0),
 506                                 v3s16(1,0,0),
 507                                 v3s16(1,0,1),
 508                                 v3s16(0,0,1),
 509                         };
 510                         for(u32 i=0; i<4; i++)
 511                         {
 512                                 v3s16 cornerdir = halfdirs[i];
 513                                 float cornerlevel = 0;
 514                                 u32 valid_count = 0;
 515                                 u32 air_count = 0;
 516                                 for(u32 j=0; j<4; j++)
 517                                 {
 518                                         v3s16 neighbordir = cornerdir - halfdirs[j];
 519                                         content_t content = neighbor_contents[neighbordir];
 520                                         // If top is liquid, draw starting from top of node
 521                                         if(neighbor_flags[neighbordir] &
 522                                                         neighborflag_top_is_same_liquid)
 523                                         {
 524                                                 cornerlevel = 0.5*BS;
 525                                                 valid_count = 1;
 526                                                 break;
 527                                         }
 528                                         // Source is always the same height
 529                                         else if(content == c_source)
 530                                         {
 531                                                 cornerlevel = (-0.5+node_liquid_level)*BS;
 532                                                 valid_count = 1;
 533                                                 break;
 534                                         }
 535                                         // Flowing liquid has level information
 536                                         else if(content == c_flowing)
 537                                         {
 538                                                 cornerlevel += neighbor_levels[neighbordir];
 539                                                 valid_count++;
 540                                         }
 541                                         else if(content == CONTENT_AIR)
 542                                         {
 543                                                 air_count++;
 544                                         }
 545                                 }
 546                                 if(air_count >= 2)
 547                                         cornerlevel = -0.5*BS+0.2;
 548                                 else if(valid_count > 0)
 549                                         cornerlevel /= valid_count;
 550                                 corner_levels[i] = cornerlevel;
 551                         }
 552
 553                         /*
 554                                 Generate sides
 555                         */
 556
 557                         v3s16 side_dirs[4] = {
 558                                 v3s16(1,0,0),
 559                                 v3s16(-1,0,0),
 560                                 v3s16(0,0,1),
 561                                 v3s16(0,0,-1),
 562                         };
 563                         s16 side_corners[4][2] = {
 564                                 {1, 2},
 565                                 {3, 0},
 566                                 {2, 3},
 567                                 {0, 1},
 568                         };
 569                         for(u32 i=0; i<4; i++)
 570                         {
 571                                 v3s16 dir = side_dirs[i];
 572
 573                                 /*
 574                                         If our topside is liquid and neighbor's topside
 575                                         is liquid, don't draw side face
 576                                 */
 577                                 if(top_is_same_liquid &&
 578                                                 neighbor_flags[dir] & neighborflag_top_is_same_liquid)
 579                                         continue;
 580
 581                                 content_t neighbor_content = neighbor_contents[dir];
 582                                 const ContentFeatures &n_feat = nodedef->get(neighbor_content);
 583
 584                                 // Don't draw face if neighbor is blocking the view
 585                                 if(n_feat.solidness == 2)
 586                                         continue;
 587
 588                                 bool neighbor_is_same_liquid = (neighbor_content == c_source
 589                                                 || neighbor_content == c_flowing);
 590
 591                                 // Don't draw any faces if neighbor same is liquid and top is
 592                                 // same liquid
 593                                 if(neighbor_is_same_liquid == true
 594                                                 && top_is_same_liquid == false)
 595                                         continue;
 596
 597                                 // Use backface culled material if neighbor doesn't have a
 598                                 // solidness of 0
 599                                 const TileSpec *current_tile = &tile_liquid;
 600                                 if(n_feat.solidness != 0 || n_feat.visual_solidness != 0)
 601                                         current_tile = &tile_liquid_bfculled;
 602
 603                                 video::S3DVertex vertices[4] =
 604                                 {
 605                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,1),
 606                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,1),
 607                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,0),
 608                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,0),
 609                                 };
 610
 611                                 /*
 612                                         If our topside is liquid, set upper border of face
 613                                         at upper border of node
 614                                 */
 615                                 if(top_is_same_liquid)
 616                                 {
 617                                         vertices[2].Pos.Y = 0.5*BS;
 618                                         vertices[3].Pos.Y = 0.5*BS;
 619                                 }
 620                                 /*
 621                                         Otherwise upper position of face is corner levels
 622                                 */
 623                                 else
 624                                 {
 625                                         vertices[2].Pos.Y = corner_levels[side_corners[i][0]];
 626                                         vertices[3].Pos.Y = corner_levels[side_corners[i][1]];
 627                                 }
 628
 629                                 /*
 630                                         If neighbor is liquid, lower border of face is corner
 631                                         liquid levels
 632                                 */
 633                                 if(neighbor_is_same_liquid)
 634                                 {
 635                                         vertices[0].Pos.Y = corner_levels[side_corners[i][1]];
 636                                         vertices[1].Pos.Y = corner_levels[side_corners[i][0]];
 637                                 }
 638                                 /*
 639                                         If neighbor is not liquid, lower border of face is
 640                                         lower border of node
 641                                 */
 642                                 else
 643                                 {
 644                                         vertices[0].Pos.Y = -0.5*BS;
 645                                         vertices[1].Pos.Y = -0.5*BS;
 646                                 }
 647
 648                                 for(s32 j=0; j<4; j++)
 649                                 {
 650                                         if(dir == v3s16(0,0,1))
 651                                                 vertices[j].Pos.rotateXZBy(0);
 652                                         if(dir == v3s16(0,0,-1))
 653                                                 vertices[j].Pos.rotateXZBy(180);
 654                                         if(dir == v3s16(-1,0,0))
 655                                                 vertices[j].Pos.rotateXZBy(90);
 656                                         if(dir == v3s16(1,0,-0))
 657                                                 vertices[j].Pos.rotateXZBy(-90);
 658
 659                                         // Do this to not cause glitches when two liquids are
 660                                         // side-by-side
 661                                         /*if(neighbor_is_same_liquid == false){
 662                                                 vertices[j].Pos.X *= 0.98;
 663                                                 vertices[j].Pos.Z *= 0.98;
 664                                         }*/
 665
 666                                         vertices[j].Pos += intToFloat(p, BS);
 667                                 }
 668
 669                                 u16 indices[] = {0,1,2,2,3,0};
 670                                 // Add to mesh collector
 671                                 collector.append(*current_tile, vertices, 4, indices, 6);
 672                         }
 673
 674                         /*
 675                                 Generate top side, if appropriate
 676                         */
 677
 678                         if(top_is_same_liquid == false)
 679                         {
 680                                 video::S3DVertex vertices[4] =
 681                                 {
 682                                         video::S3DVertex(-BS/2,0,BS/2, 0,0,0, c, 0,1),
 683                                         video::S3DVertex(BS/2,0,BS/2, 0,0,0, c, 1,1),
 684                                         video::S3DVertex(BS/2,0,-BS/2, 0,0,0, c, 1,0),
 685                                         video::S3DVertex(-BS/2,0,-BS/2, 0,0,0, c, 0,0),
 686                                 };
 687
 688                                 // To get backface culling right, the vertices need to go
 689                                 // clockwise around the front of the face. And we happened to
 690                                 // calculate corner levels in exact reverse order.
 691                                 s32 corner_resolve[4] = {3,2,1,0};
 692
 693                                 for(s32 i=0; i<4; i++)
 694                                 {
 695                                         //vertices[i].Pos.Y += liquid_level;
 696                                         //vertices[i].Pos.Y += neighbor_levels[v3s16(0,0,0)];
 697                                         s32 j = corner_resolve[i];
 698                                         vertices[i].Pos.Y += corner_levels[j];
 699                                         vertices[i].Pos += intToFloat(p, BS);
 700                                 }
 701
 702                                 // Default downwards-flowing texture animation goes from
 703                                 // -Z towards +Z, thus the direction is +Z.
 704                                 // Rotate texture to make animation go in flow direction
 705                                 // Positive if liquid moves towards +Z
 706                                 f32 dz = (corner_levels[side_corners[3][0]] +
 707                                                 corner_levels[side_corners[3][1]]) -
 708                                                 (corner_levels[side_corners[2][0]] +
 709                                                 corner_levels[side_corners[2][1]]);
 710                                 // Positive if liquid moves towards +X
 711                                 f32 dx = (corner_levels[side_corners[1][0]] +
 712                                                 corner_levels[side_corners[1][1]]) -
 713                                                 (corner_levels[side_corners[0][0]] +
 714                                                 corner_levels[side_corners[0][1]]);
 715                                 f32 tcoord_angle = atan2(dz, dx) * core::RADTODEG ;
 716                                 v2f tcoord_center(0.5, 0.5);
 717                                 v2f tcoord_translate(
 718                                                 blockpos_nodes.Z + z,
 719                                                 blockpos_nodes.X + x);
 720                                 tcoord_translate.rotateBy(tcoord_angle);
 721                                 tcoord_translate.X -= floor(tcoord_translate.X);
 722                                 tcoord_translate.Y -= floor(tcoord_translate.Y);
 723
 724                                 for(s32 i=0; i<4; i++)
 725                                 {
 726                                         vertices[i].TCoords.rotateBy(
 727                                                         tcoord_angle,
 728                                                         tcoord_center);
 729                                         vertices[i].TCoords += tcoord_translate;
 730                                 }
 731
 732                                 v2f t = vertices[0].TCoords;
 733                                 vertices[0].TCoords = vertices[2].TCoords;
 734                                 vertices[2].TCoords = t;
 735
 736                                 u16 indices[] = {0,1,2,2,3,0};
 737                                 // Add to mesh collector
 738                                 collector.append(tile_liquid, vertices, 4, indices, 6);
 739                         }
 740                 break;}
 741                 case NDT_GLASSLIKE:
 742                 {
 743                         TileSpec tile = getNodeTile(n, p, v3s16(0,0,0), data);
 744
 745                         u16 l = getInteriorLight(n, 1, nodedef);
 746                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
 747
 748                         for(u32 j=0; j<6; j++)
 749                         {
 750                                 // Check this neighbor
 751                                 v3s16 n2p = blockpos_nodes + p + g_6dirs[j];
 752                                 MapNode n2 = data->m_vmanip.getNodeNoEx(n2p);
 753                                 // Don't make face if neighbor is of same type
 754                                 if(n2.getContent() == n.getContent())
 755                                         continue;
 756
 757                                 // The face at Z+
 758                                 video::S3DVertex vertices[4] = {
 759                                         video::S3DVertex(-BS/2,-BS/2,BS/2, 0,0,0, c, 1,1),
 760                                         video::S3DVertex(BS/2,-BS/2,BS/2, 0,0,0, c, 0,1),
 761                                         video::S3DVertex(BS/2,BS/2,BS/2, 0,0,0, c, 0,0),
 762                                         video::S3DVertex(-BS/2,BS/2,BS/2, 0,0,0, c, 1,0),
 763                                 };
 764
 765                                 // Rotations in the g_6dirs format
 766                                 if(j == 0) // Z+
 767                                         for(u16 i=0; i<4; i++)
 768                                                 vertices[i].Pos.rotateXZBy(0);
 769                                 else if(j == 1) // Y+
 770                                         for(u16 i=0; i<4; i++)
 771                                                 vertices[i].Pos.rotateYZBy(-90);
 772                                 else if(j == 2) // X+
 773                                         for(u16 i=0; i<4; i++)
 774                                                 vertices[i].Pos.rotateXZBy(-90);
 775                                 else if(j == 3) // Z-
 776                                         for(u16 i=0; i<4; i++)
 777                                                 vertices[i].Pos.rotateXZBy(180);
 778                                 else if(j == 4) // Y-
 779                                         for(u16 i=0; i<4; i++)
 780                                                 vertices[i].Pos.rotateYZBy(90);
 781                                 else if(j == 5) // X-
 782                                         for(u16 i=0; i<4; i++)
 783                                                 vertices[i].Pos.rotateXZBy(90);
 784
 785                                 for(u16 i=0; i<4; i++){
 786                                         vertices[i].Pos += intToFloat(p, BS);
 787                                 }
 788
 789                                 u16 indices[] = {0,1,2,2,3,0};
 790                                 // Add to mesh collector
 791                                 collector.append(tile, vertices, 4, indices, 6);
 792                         }
 793                 break;}
 794                 case NDT_GLASSLIKE_FRAMED:
 795                 {
 796                         static const v3s16 dirs[6] = {
 797                                 v3s16( 0, 1, 0),
 798                                 v3s16( 0,-1, 0),
 799                                 v3s16( 1, 0, 0),
 800                                 v3s16(-1, 0, 0),
 801                                 v3s16( 0, 0, 1),
 802                                 v3s16( 0, 0,-1)
 803                         };
 804
 805                         u8 i;
 806                         TileSpec tiles[6];
 807                         for (i = 0; i < 6; i++)
 808                                 tiles[i] = getNodeTile(n, p, dirs[i], data);
 809
 810                         TileSpec glass_tiles[6];
 811                         if (tiles[1].texture && tiles[2].texture && tiles[3].texture) {
 812                                 glass_tiles[0] = tiles[2];
 813                                 glass_tiles[1] = tiles[3];
 814                                 glass_tiles[2] = tiles[1];
 815                                 glass_tiles[3] = tiles[1];
 816                                 glass_tiles[4] = tiles[1];
 817                                 glass_tiles[5] = tiles[1];
 818                         } else {
 819                                 for (i = 0; i < 6; i++)
 820                                         glass_tiles[i] = tiles[1];
 821                         }
 822
 823                         u8 param2 = n.getParam2();
 824                         bool H_merge = ! bool(param2 & 128);
 825                         bool V_merge = ! bool(param2 & 64);
 826                         param2  = param2 & 63;
 827
 828                         u16 l = getInteriorLight(n, 1, nodedef);
 829                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
 830                         v3f pos = intToFloat(p, BS);
 831                         static const float a = BS / 2;
 832                         static const float g = a - 0.003;
 833                         static const float b = .876 * ( BS / 2 );
 834
 835                         static const aabb3f frame_edges[12] = {
 836                                 aabb3f( b, b,-a, a, a, a), // y+
 837                                 aabb3f(-a, b,-a,-b, a, a), // y+
 838                                 aabb3f( b,-a,-a, a,-b, a), // y-
 839                                 aabb3f(-a,-a,-a,-b,-b, a), // y-
 840                                 aabb3f( b,-a, b, a, a, a), // x+
 841                                 aabb3f( b,-a,-a, a, a,-b), // x+
 842                                 aabb3f(-a,-a, b,-b, a, a), // x-
 843                                 aabb3f(-a,-a,-a,-b, a,-b), // x-
 844                                 aabb3f(-a, b, b, a, a, a), // z+
 845                                 aabb3f(-a,-a, b, a,-b, a), // z+
 846                                 aabb3f(-a,-a,-a, a,-b,-b), // z-
 847                                 aabb3f(-a, b,-a, a, a,-b)  // z-
 848                         };
 849                         static const aabb3f glass_faces[6] = {
 850                                 aabb3f(-g, g,-g, g, g, g), // y+
 851                                 aabb3f(-g,-g,-g, g,-g, g), // y-
 852                                 aabb3f( g,-g,-g, g, g, g), // x+
 853                                 aabb3f(-g,-g,-g,-g, g, g), // x-
 854                                 aabb3f(-g,-g, g, g, g, g), // z+
 855                                 aabb3f(-g,-g,-g, g, g,-g)  // z-
 856                         };
 857
 858                         // table of node visible faces, 0 = invisible
 859                         int visible_faces[6] = {0,0,0,0,0,0};
 860
 861                         // table of neighbours, 1 = same type, checked with g_26dirs
 862                         int nb[18] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
 863
 864                         // g_26dirs to check when only horizontal merge is allowed
 865                         int nb_H_dirs[8] = {0,2,3,5,10,11,12,13};
 866
 867                         content_t current = n.getContent();
 868                         content_t n2c;
 869                         MapNode n2;
 870                         v3s16 n2p;
 871
 872                         // neighbours checks for frames visibility
 873
 874                         if (!H_merge && V_merge) {
 875                                 n2p = blockpos_nodes + p + g_26dirs[1];
 876                                 n2 = data->m_vmanip.getNodeNoEx(n2p);
 877                                 n2c = n2.getContent();
 878                                 if (n2c == current || n2c == CONTENT_IGNORE)
 879                                         nb[1] = 1;
 880                                 n2p = blockpos_nodes + p + g_26dirs[4];
 881                                 n2 = data->m_vmanip.getNodeNoEx(n2p);
 882                                 n2c = n2.getContent();
 883                                 if (n2c == current || n2c == CONTENT_IGNORE)
 884                                         nb[4] = 1;
 885                         } else if (H_merge && !V_merge) {
 886                                 for(i = 0; i < 8; i++) {
 887                                         n2p = blockpos_nodes + p + g_26dirs[nb_H_dirs[i]];
 888                                         n2 = data->m_vmanip.getNodeNoEx(n2p);
 889                                         n2c = n2.getContent();
 890                                         if (n2c == current || n2c == CONTENT_IGNORE)
 891                                                 nb[nb_H_dirs[i]] = 1;
 892                                 }
 893                         } else if (H_merge && V_merge) {
 894                                 for(i = 0; i < 18; i++) {
 895                                         n2p = blockpos_nodes + p + g_26dirs[i];
 896                                         n2 = data->m_vmanip.getNodeNoEx(n2p);
 897                                         n2c = n2.getContent();
 898                                         if (n2c == current || n2c == CONTENT_IGNORE)
 899                                                 nb[i] = 1;
 900                                 }
 901                         }
 902
 903                         // faces visibility checks
 904
 905                         if (!V_merge) {
 906                                 visible_faces[0] = 1;
 907                                 visible_faces[1] = 1;
 908                         } else {
 909                                 for(i = 0; i < 2; i++) {
 910                                         n2p = blockpos_nodes + p + dirs[i];
 911                                         n2 = data->m_vmanip.getNodeNoEx(n2p);
 912                                         n2c = n2.getContent();
 913                                         if (n2c != current)
 914                                                 visible_faces[i] = 1;
 915                                 }
 916                         }
 917
 918                         if (!H_merge) {
 919                                 visible_faces[2] = 1;
 920                                 visible_faces[3] = 1;
 921                                 visible_faces[4] = 1;
 922                                 visible_faces[5] = 1;
 923                         } else {
 924                                 for(i = 2; i < 6; i++) {
 925                                         n2p = blockpos_nodes + p + dirs[i];
 926                                         n2 = data->m_vmanip.getNodeNoEx(n2p);
 927                                         n2c = n2.getContent();
 928                                         if (n2c != current)
 929                                                 visible_faces[i] = 1;
 930                                 }
 931                         }
 932
 933                         static const u8 nb_triplet[12*3] = {
 934                                 1,2, 7,  1,5, 6,  4,2,15,  4,5,14,
 935                                 2,0,11,  2,3,13,  5,0,10,  5,3,12,
 936                                 0,1, 8,  0,4,16,  3,4,17,  3,1, 9
 937                         };
 938
 939                         f32 tx1, ty1, tz1, tx2, ty2, tz2;
 940                         aabb3f box;
 941
 942                         for(i = 0; i < 12; i++)
 943                         {
 944                                 int edge_invisible;
 945                                 if (nb[nb_triplet[i*3+2]])
 946                                         edge_invisible = nb[nb_triplet[i*3]] & nb[nb_triplet[i*3+1]];
 947                                 else
 948                                         edge_invisible = nb[nb_triplet[i*3]] ^ nb[nb_triplet[i*3+1]];
 949                                 if (edge_invisible)
 950                                         continue;
 951                                 box = frame_edges[i];
 952                                 box.MinEdge += pos;
 953                                 box.MaxEdge += pos;
 954                                 tx1 = (box.MinEdge.X / BS) + 0.5;
 955                                 ty1 = (box.MinEdge.Y / BS) + 0.5;
 956                                 tz1 = (box.MinEdge.Z / BS) + 0.5;
 957                                 tx2 = (box.MaxEdge.X / BS) + 0.5;
 958                                 ty2 = (box.MaxEdge.Y / BS) + 0.5;
 959                                 tz2 = (box.MaxEdge.Z / BS) + 0.5;
 960                                 f32 txc1[24] = {
 961                                         tx1,   1-tz2,   tx2, 1-tz1,
 962                                         tx1,     tz1,   tx2,   tz2,
 963                                         tz1,   1-ty2,   tz2, 1-ty1,
 964                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
 965                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
 966                                         tx1,   1-ty2,   tx2, 1-ty1,
 967                                 };
 968                                 makeCuboid(&collector, box, &tiles[0], 1, c, txc1);
 969                         }
 970
 971                         for(i = 0; i < 6; i++)
 972                         {
 973                                 if (!visible_faces[i])
 974                                         continue;
 975                                 box = glass_faces[i];
 976                                 box.MinEdge += pos;
 977                                 box.MaxEdge += pos;
 978                                 tx1 = (box.MinEdge.X / BS) + 0.5;
 979                                 ty1 = (box.MinEdge.Y / BS) + 0.5;
 980                                 tz1 = (box.MinEdge.Z / BS) + 0.5;
 981                                 tx2 = (box.MaxEdge.X / BS) + 0.5;
 982                                 ty2 = (box.MaxEdge.Y / BS) + 0.5;
 983                                 tz2 = (box.MaxEdge.Z / BS) + 0.5;
 984                                 f32 txc2[24] = {
 985                                         tx1,   1-tz2,   tx2, 1-tz1,
 986                                         tx1,     tz1,   tx2,   tz2,
 987                                         tz1,   1-ty2,   tz2, 1-ty1,
 988                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
 989                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
 990                                         tx1,   1-ty2,   tx2, 1-ty1,
 991                                 };
 992                                 makeCuboid(&collector, box, &glass_tiles[i], 1, c, txc2);
 993                         }
 994
 995                         if (param2 > 0 && f.special_tiles[0].texture) {
 996                                 // Interior volume level is in range 0 .. 63,
 997                                 // convert it to -0.5 .. 0.5
 998                                 float vlev = (((float)param2 / 63.0 ) * 2.0 - 1.0);
 999                                 TileSpec interior_tiles[6];
1000                                 for (i = 0; i < 6; i++)
1001                                         interior_tiles[i] = f.special_tiles[0];
1002                                 float offset = 0.003;
1003                                 box = aabb3f(visible_faces[3] ? -b : -a + offset,
1004                                                          visible_faces[1] ? -b : -a + offset,
1005                                                          visible_faces[5] ? -b : -a + offset,
1006                                                          visible_faces[2] ? b : a - offset,
1007                                                          visible_faces[0] ? b * vlev : a * vlev - offset,
1008                                                          visible_faces[4] ? b : a - offset);
1009                                 box.MinEdge += pos;
1010                                 box.MaxEdge += pos;
1011                                 tx1 = (box.MinEdge.X / BS) + 0.5;
1012                                 ty1 = (box.MinEdge.Y / BS) + 0.5;
1013                                 tz1 = (box.MinEdge.Z / BS) + 0.5;
1014                                 tx2 = (box.MaxEdge.X / BS) + 0.5;
1015                                 ty2 = (box.MaxEdge.Y / BS) + 0.5;
1016                                 tz2 = (box.MaxEdge.Z / BS) + 0.5;
1017                                 f32 txc3[24] = {
1018                                         tx1,   1-tz2,   tx2, 1-tz1,
1019                                         tx1,     tz1,   tx2,   tz2,
1020                                         tz1,   1-ty2,   tz2, 1-ty1,
1021                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
1022                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
1023                                         tx1,   1-ty2,   tx2, 1-ty1,
1024                                 };
1025                                 makeCuboid(&collector, box, interior_tiles, 6, c,  txc3);
1026                         }
1027                 break;}
1028                 case NDT_ALLFACES:
1029                 {
1030                         TileSpec tile_leaves = getNodeTile(n, p,
1031                                         v3s16(0,0,0), data);
1032
1033                         u16 l = getInteriorLight(n, 1, nodedef);
1034                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
1035
1036                         v3f pos = intToFloat(p, BS);
1037                         aabb3f box(-BS/2,-BS/2,-BS/2,BS/2,BS/2,BS/2);
1038                         box.MinEdge += pos;
1039                         box.MaxEdge += pos;
1040                         makeCuboid(&collector, box, &tile_leaves, 1, c, NULL);
1041                 break;}
1042                 case NDT_ALLFACES_OPTIONAL:
1043                         // This is always pre-converted to something else
1044                         assert(0);
1045                         break;
1046                 case NDT_TORCHLIKE:
1047                 {
1048                         v3s16 dir = n.getWallMountedDir(nodedef);
1049
1050                         u8 tileindex = 0;
1051                         if(dir == v3s16(0,-1,0)){
1052                                 tileindex = 0; // floor
1053                         } else if(dir == v3s16(0,1,0)){
1054                                 tileindex = 1; // ceiling
1055                         // For backwards compatibility
1056                         } else if(dir == v3s16(0,0,0)){
1057                                 tileindex = 0; // floor
1058                         } else {
1059                                 tileindex = 2; // side
1060                         }
1061
1062                         TileSpec tile = getNodeTileN(n, p, tileindex, data);
1063                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
1064                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
1065
1066                         u16 l = getInteriorLight(n, 1, nodedef);
1067                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
1068
1069                         float s = BS/2*f.visual_scale;
1070                         // Wall at X+ of node
1071                         video::S3DVertex vertices[4] =
1072                         {
1073                                 video::S3DVertex(-s,-s,0, 0,0,0, c, 0,1),
1074                                 video::S3DVertex( s,-s,0, 0,0,0, c, 1,1),
1075                                 video::S3DVertex( s, s,0, 0,0,0, c, 1,0),
1076                                 video::S3DVertex(-s, s,0, 0,0,0, c, 0,0),
1077                         };
1078
1079                         for(s32 i=0; i<4; i++)
1080                         {
1081                                 if(dir == v3s16(1,0,0))
1082                                         vertices[i].Pos.rotateXZBy(0);
1083                                 if(dir == v3s16(-1,0,0))
1084                                         vertices[i].Pos.rotateXZBy(180);
1085                                 if(dir == v3s16(0,0,1))
1086                                         vertices[i].Pos.rotateXZBy(90);
1087                                 if(dir == v3s16(0,0,-1))
1088                                         vertices[i].Pos.rotateXZBy(-90);
1089                                 if(dir == v3s16(0,-1,0))
1090                                         vertices[i].Pos.rotateXZBy(45);
1091                                 if(dir == v3s16(0,1,0))
1092                                         vertices[i].Pos.rotateXZBy(-45);
1093
1094                                 vertices[i].Pos += intToFloat(p, BS);
1095                         }
1096
1097                         u16 indices[] = {0,1,2,2,3,0};
1098                         // Add to mesh collector
1099                         collector.append(tile, vertices, 4, indices, 6);
1100                 break;}
1101                 case NDT_SIGNLIKE:
1102                 {
1103                         TileSpec tile = getNodeTileN(n, p, 0, data);
1104                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
1105                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
1106
1107                         u16 l = getInteriorLight(n, 0, nodedef);
1108                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
1109
1110                         float d = (float)BS/16;
1111                         float s = BS/2*f.visual_scale;
1112                         // Wall at X+ of node
1113                         video::S3DVertex vertices[4] =
1114                         {
1115                                 video::S3DVertex(BS/2-d,  s,  s, 0,0,0, c, 0,0),
1116                                 video::S3DVertex(BS/2-d,  s, -s, 0,0,0, c, 1,0),
1117                                 video::S3DVertex(BS/2-d, -s, -s, 0,0,0, c, 1,1),
1118                                 video::S3DVertex(BS/2-d, -s,  s, 0,0,0, c, 0,1),
1119                         };
1120
1121                         v3s16 dir = n.getWallMountedDir(nodedef);
1122
1123                         for(s32 i=0; i<4; i++)
1124                         {
1125                                 if(dir == v3s16(1,0,0))
1126                                         vertices[i].Pos.rotateXZBy(0);
1127                                 if(dir == v3s16(-1,0,0))
1128                                         vertices[i].Pos.rotateXZBy(180);
1129                                 if(dir == v3s16(0,0,1))
1130                                         vertices[i].Pos.rotateXZBy(90);
1131                                 if(dir == v3s16(0,0,-1))
1132                                         vertices[i].Pos.rotateXZBy(-90);
1133                                 if(dir == v3s16(0,-1,0))
1134                                         vertices[i].Pos.rotateXYBy(-90);
1135                                 if(dir == v3s16(0,1,0))
1136                                         vertices[i].Pos.rotateXYBy(90);
1137
1138                                 vertices[i].Pos += intToFloat(p, BS);
1139                         }
1140
1141                         u16 indices[] = {0,1,2,2,3,0};
1142                         // Add to mesh collector
1143                         collector.append(tile, vertices, 4, indices, 6);
1144                 break;}
1145                 case NDT_PLANTLIKE:
1146                 {
1147                         TileSpec tile = getNodeTileN(n, p, 0, data);
1148                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
1149
1150                         u16 l = getInteriorLight(n, 1, nodedef);
1151                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
1152
1153                         float s = BS/2*f.visual_scale;
1154
1155                         for(u32 j=0; j<2; j++)
1156                         {
1157                                 video::S3DVertex vertices[4] =
1158                                 {
1159                                         video::S3DVertex(-s,-BS/2,      0, 0,0,0, c, 0,1),
1160                                         video::S3DVertex( s,-BS/2,      0, 0,0,0, c, 1,1),
1161                                         video::S3DVertex( s,-BS/2 + s*2,0, 0,0,0, c, 1,0),
1162                                         video::S3DVertex(-s,-BS/2 + s*2,0, 0,0,0, c, 0,0),
1163                                 };
1164
1165                                 if(j == 0)
1166                                 {
1167                                         for(u16 i=0; i<4; i++)
1168                                                 vertices[i].Pos.rotateXZBy(46 + n.param2 * 2);
1169                                 }
1170                                 else if(j == 1)
1171                                 {
1172                                         for(u16 i=0; i<4; i++)
1173                                                 vertices[i].Pos.rotateXZBy(-44 + n.param2 * 2);
1174                                 }
1175
1176                                 for(u16 i=0; i<4; i++)
1177                                 {
1178                                         vertices[i].Pos *= f.visual_scale;
1179                                         vertices[i].Pos += intToFloat(p, BS);
1180                                 }
1181
1182                                 u16 indices[] = {0,1,2,2,3,0};
1183                                 // Add to mesh collector
1184                                 collector.append(tile, vertices, 4, indices, 6);
1185                         }
1186                 break;}
1187                 case NDT_FENCELIKE:
1188                 {
1189                         TileSpec tile = getNodeTile(n, p, v3s16(0,0,0), data);
1190                         TileSpec tile_nocrack = tile;
1191                         tile_nocrack.material_flags &= ~MATERIAL_FLAG_CRACK;
1192
1193                         // Put wood the right way around in the posts
1194                         TileSpec tile_rot = tile;
1195                         tile_rot.rotation = 1;
1196
1197                         u16 l = getInteriorLight(n, 1, nodedef);
1198                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
1199
1200                         const f32 post_rad=(f32)BS/8;
1201                         const f32 bar_rad=(f32)BS/16;
1202                         const f32 bar_len=(f32)(BS/2)-post_rad;
1203
1204                         v3f pos = intToFloat(p, BS);
1205
1206                         // The post - always present
1207                         aabb3f post(-post_rad,-BS/2,-post_rad,post_rad,BS/2,post_rad);
1208                         post.MinEdge += pos;
1209                         post.MaxEdge += pos;
1210                         f32 postuv[24]={
1211                                         6/16.,6/16.,10/16.,10/16.,
1212                                         6/16.,6/16.,10/16.,10/16.,
1213                                         0/16.,0,4/16.,1,
1214                                         4/16.,0,8/16.,1,
1215                                         8/16.,0,12/16.,1,
1216                                         12/16.,0,16/16.,1};
1217                         makeCuboid(&collector, post, &tile_rot, 1, c, postuv);
1218
1219                         // Now a section of fence, +X, if there's a post there
1220                         v3s16 p2 = p;
1221                         p2.X++;
1222                         MapNode n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
1223                         const ContentFeatures *f2 = &nodedef->get(n2);
1224                         if(f2->drawtype == NDT_FENCELIKE)
1225                         {
1226                                 aabb3f bar(-bar_len+BS/2,-bar_rad+BS/4,-bar_rad,
1227                                                 bar_len+BS/2,bar_rad+BS/4,bar_rad);
1228                                 bar.MinEdge += pos;
1229                                 bar.MaxEdge += pos;
1230                                 f32 xrailuv[24]={
1231                                         0/16.,2/16.,16/16.,4/16.,
1232                                         0/16.,4/16.,16/16.,6/16.,
1233                                         6/16.,6/16.,8/16.,8/16.,
1234                                         10/16.,10/16.,12/16.,12/16.,
1235                                         0/16.,8/16.,16/16.,10/16.,
1236                                         0/16.,14/16.,16/16.,16/16.};
1237                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1238                                                 c, xrailuv);
1239                                 bar.MinEdge.Y -= BS/2;
1240                                 bar.MaxEdge.Y -= BS/2;
1241                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1242                                                 c, xrailuv);
1243                         }
1244
1245                         // Now a section of fence, +Z, if there's a post there
1246                         p2 = p;
1247                         p2.Z++;
1248                         n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
1249                         f2 = &nodedef->get(n2);
1250                         if(f2->drawtype == NDT_FENCELIKE)
1251                         {
1252                                 aabb3f bar(-bar_rad,-bar_rad+BS/4,-bar_len+BS/2,
1253                                                 bar_rad,bar_rad+BS/4,bar_len+BS/2);
1254                                 bar.MinEdge += pos;
1255                                 bar.MaxEdge += pos;
1256                                 f32 zrailuv[24]={
1257                                         3/16.,1/16.,5/16.,5/16., // cannot rotate; stretch
1258                                         4/16.,1/16.,6/16.,5/16., // for wood texture instead
1259                                         0/16.,9/16.,16/16.,11/16.,
1260                                         0/16.,6/16.,16/16.,8/16.,
1261                                         6/16.,6/16.,8/16.,8/16.,
1262                                         10/16.,10/16.,12/16.,12/16.};
1263                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1264                                                 c, zrailuv);
1265                                 bar.MinEdge.Y -= BS/2;
1266                                 bar.MaxEdge.Y -= BS/2;
1267                                 makeCuboid(&collector, bar, &tile_nocrack, 1,
1268                                                 c, zrailuv);
1269                         }
1270                 break;}
1271                 case NDT_RAILLIKE:
1272                 {
1273                         bool is_rail_x [] = { false, false };  /* x-1, x+1 */
1274                         bool is_rail_z [] = { false, false };  /* z-1, z+1 */
1275
1276                         bool is_rail_z_minus_y [] = { false, false };  /* z-1, z+1; y-1 */
1277                         bool is_rail_x_minus_y [] = { false, false };  /* x-1, z+1; y-1 */
1278                         bool is_rail_z_plus_y [] = { false, false };  /* z-1, z+1; y+1 */
1279                         bool is_rail_x_plus_y [] = { false, false };  /* x-1, x+1; y+1 */
1280
1281                         MapNode n_minus_x = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1,y,z));
1282                         MapNode n_plus_x = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1,y,z));
1283                         MapNode n_minus_z = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y,z-1));
1284                         MapNode n_plus_z = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x,y,z+1));
1285                         MapNode n_plus_x_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1, y+1, z));
1286                         MapNode n_plus_x_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x+1, y-1, z));
1287                         MapNode n_minus_x_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1, y+1, z));
1288                         MapNode n_minus_x_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x-1, y-1, z));
1289                         MapNode n_plus_z_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y+1, z+1));
1290                         MapNode n_minus_z_plus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y+1, z-1));
1291                         MapNode n_plus_z_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y-1, z+1));
1292                         MapNode n_minus_z_minus_y = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(x, y-1, z-1));
1293
1294                         content_t thiscontent = n.getContent();
1295                         std::string groupname = "connect_to_raillike"; // name of the group that enables connecting to raillike nodes of different kind
1296                         bool self_connect_to_raillike = ((ItemGroupList) nodedef->get(n).groups)[groupname] != 0;
1297
1298                         if ((nodedef->get(n_minus_x).drawtype == NDT_RAILLIKE
1299                                         && ((ItemGroupList) nodedef->get(n_minus_x).groups)[groupname] != 0
1300                                         && self_connect_to_raillike)
1301                                         || n_minus_x.getContent() == thiscontent)
1302                                 is_rail_x[0] = true;
1303
1304                         if ((nodedef->get(n_minus_x_minus_y).drawtype == NDT_RAILLIKE
1305                                         && ((ItemGroupList) nodedef->get(n_minus_x_minus_y).groups)[groupname] != 0
1306                                         && self_connect_to_raillike)
1307                                         || n_minus_x_minus_y.getContent() == thiscontent)
1308                                 is_rail_x_minus_y[0] = true;
1309
1310                         if ((nodedef->get(n_minus_x_plus_y).drawtype == NDT_RAILLIKE
1311                                         && ((ItemGroupList) nodedef->get(n_minus_x_plus_y).groups)[groupname] != 0
1312                                         && self_connect_to_raillike)
1313                                         || n_minus_x_plus_y.getContent() == thiscontent)
1314                                 is_rail_x_plus_y[0] = true;
1315
1316                         if ((nodedef->get(n_plus_x).drawtype == NDT_RAILLIKE
1317                                         && ((ItemGroupList) nodedef->get(n_plus_x).groups)[groupname] != 0
1318                                         && self_connect_to_raillike)
1319                                         || n_plus_x.getContent() == thiscontent)
1320                                 is_rail_x[1] = true;
1321
1322                         if ((nodedef->get(n_plus_x_minus_y).drawtype == NDT_RAILLIKE
1323                                         && ((ItemGroupList) nodedef->get(n_plus_x_minus_y).groups)[groupname] != 0
1324                                         && self_connect_to_raillike)
1325                                         || n_plus_x_minus_y.getContent() == thiscontent)
1326                                 is_rail_x_minus_y[1] = true;
1327
1328                         if ((nodedef->get(n_plus_x_plus_y).drawtype == NDT_RAILLIKE
1329                                         && ((ItemGroupList) nodedef->get(n_plus_x_plus_y).groups)[groupname] != 0
1330                                         && self_connect_to_raillike)
1331                                         || n_plus_x_plus_y.getContent() == thiscontent)
1332                                 is_rail_x_plus_y[1] = true;
1333
1334                         if ((nodedef->get(n_minus_z).drawtype == NDT_RAILLIKE
1335                                         && ((ItemGroupList) nodedef->get(n_minus_z).groups)[groupname] != 0
1336                                         && self_connect_to_raillike)
1337                                         || n_minus_z.getContent() == thiscontent)
1338                                 is_rail_z[0] = true;
1339
1340                         if ((nodedef->get(n_minus_z_minus_y).drawtype == NDT_RAILLIKE
1341                                         && ((ItemGroupList) nodedef->get(n_minus_z_minus_y).groups)[groupname] != 0
1342                                         && self_connect_to_raillike)
1343                                         || n_minus_z_minus_y.getContent() == thiscontent)
1344                                 is_rail_z_minus_y[0] = true;
1345
1346                         if ((nodedef->get(n_minus_z_plus_y).drawtype == NDT_RAILLIKE
1347                                         && ((ItemGroupList) nodedef->get(n_minus_z_plus_y).groups)[groupname] != 0
1348                                         && self_connect_to_raillike)
1349                                         || n_minus_z_plus_y.getContent() == thiscontent)
1350                                 is_rail_z_plus_y[0] = true;
1351
1352                         if ((nodedef->get(n_plus_z).drawtype == NDT_RAILLIKE
1353                                         && ((ItemGroupList) nodedef->get(n_plus_z).groups)[groupname] != 0
1354                                         && self_connect_to_raillike)
1355                                         || n_plus_z.getContent() == thiscontent)
1356                                 is_rail_z[1] = true;
1357
1358                         if ((nodedef->get(n_plus_z_minus_y).drawtype == NDT_RAILLIKE
1359                                         && ((ItemGroupList) nodedef->get(n_plus_z_minus_y).groups)[groupname] != 0
1360                                         && self_connect_to_raillike)
1361                                         || n_plus_z_minus_y.getContent() == thiscontent)
1362                                 is_rail_z_minus_y[1] = true;
1363
1364                         if ((nodedef->get(n_plus_z_plus_y).drawtype == NDT_RAILLIKE
1365                                         && ((ItemGroupList) nodedef->get(n_plus_z_plus_y).groups)[groupname] != 0
1366                                         && self_connect_to_raillike)
1367                                         || n_plus_z_plus_y.getContent() == thiscontent)
1368                                 is_rail_z_plus_y[1] = true;
1369
1370                         bool is_rail_x_all[] = {false, false};
1371                         bool is_rail_z_all[] = {false, false};
1372                         is_rail_x_all[0]=is_rail_x[0] || is_rail_x_minus_y[0] || is_rail_x_plus_y[0];
1373                         is_rail_x_all[1]=is_rail_x[1] || is_rail_x_minus_y[1] || is_rail_x_plus_y[1];
1374                         is_rail_z_all[0]=is_rail_z[0] || is_rail_z_minus_y[0] || is_rail_z_plus_y[0];
1375                         is_rail_z_all[1]=is_rail_z[1] || is_rail_z_minus_y[1] || is_rail_z_plus_y[1];
1376
1377                         // reasonable default, flat straight unrotated rail
1378                         bool is_straight = true;
1379                         int adjacencies = 0;
1380                         int angle = 0;
1381                         u8 tileindex = 0;
1382
1383                         // check for sloped rail
1384                         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])
1385                         {
1386                                 adjacencies = 5; //5 means sloped
1387                                 is_straight = true; // sloped is always straight
1388                         }
1389                         else
1390                         {
1391                                 // is really straight, rails on both sides
1392                                 is_straight = (is_rail_x_all[0] && is_rail_x_all[1]) || (is_rail_z_all[0] && is_rail_z_all[1]);
1393                                 adjacencies = is_rail_x_all[0] + is_rail_x_all[1] + is_rail_z_all[0] + is_rail_z_all[1];
1394                         }
1395
1396                         switch (adjacencies) {
1397                         case 1:
1398                                 if(is_rail_x_all[0] || is_rail_x_all[1])
1399                                         angle = 90;
1400                                 break;
1401                         case 2:
1402                                 if(!is_straight)
1403                                         tileindex = 1; // curved
1404                                 if(is_rail_x_all[0] && is_rail_x_all[1])
1405                                         angle = 90;
1406                                 if(is_rail_z_all[0] && is_rail_z_all[1]){
1407                                         if (is_rail_z_plus_y[0])
1408                                                 angle = 180;
1409                                 }
1410                                 else if(is_rail_x_all[0] && is_rail_z_all[0])
1411                                         angle = 270;
1412                                 else if(is_rail_x_all[0] && is_rail_z_all[1])
1413                                         angle = 180;
1414                                 else if(is_rail_x_all[1] && is_rail_z_all[1])
1415                                         angle = 90;
1416                                 break;
1417                         case 3:
1418                                 // here is where the potential to 'switch' a junction is, but not implemented at present
1419                                 tileindex = 2; // t-junction
1420                                 if(!is_rail_x_all[1])
1421                                         angle=180;
1422                                 if(!is_rail_z_all[0])
1423                                         angle=90;
1424                                 if(!is_rail_z_all[1])
1425                                         angle=270;
1426                                 break;
1427                         case 4:
1428                                 tileindex = 3; // crossing
1429                                 break;
1430                         case 5: //sloped
1431                                 if(is_rail_z_plus_y[0])
1432                                         angle = 180;
1433                                 if(is_rail_x_plus_y[0])
1434                                         angle = 90;
1435                                 if(is_rail_x_plus_y[1])
1436                                         angle = -90;
1437                                 break;
1438                         default:
1439                                 break;
1440                         }
1441
1442                         TileSpec tile = getNodeTileN(n, p, tileindex, data);
1443                         tile.material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
1444                         tile.material_flags |= MATERIAL_FLAG_CRACK_OVERLAY;
1445
1446                         u16 l = getInteriorLight(n, 0, nodedef);
1447                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
1448
1449                         float d = (float)BS/64;
1450
1451                         char g=-1;
1452                         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])
1453                                 g=1; //Object is at a slope
1454
1455                         video::S3DVertex vertices[4] =
1456                         {
1457                                         video::S3DVertex(-BS/2,-BS/2+d,-BS/2, 0,0,0, c, 0,1),
1458                                         video::S3DVertex(BS/2,-BS/2+d,-BS/2, 0,0,0, c, 1,1),
1459                                         video::S3DVertex(BS/2,g*BS/2+d,BS/2, 0,0,0, c, 1,0),
1460                                         video::S3DVertex(-BS/2,g*BS/2+d,BS/2, 0,0,0, c, 0,0),
1461                         };
1462
1463                         for(s32 i=0; i<4; i++)
1464                         {
1465                                 if(angle != 0)
1466                                         vertices[i].Pos.rotateXZBy(angle);
1467                                 vertices[i].Pos += intToFloat(p, BS);
1468                         }
1469
1470                         u16 indices[] = {0,1,2,2,3,0};
1471                         collector.append(tile, vertices, 4, indices, 6);
1472                 break;}
1473                 case NDT_NODEBOX:
1474                 {
1475                         static const v3s16 tile_dirs[6] = {
1476                                 v3s16(0, 1, 0),
1477                                 v3s16(0, -1, 0),
1478                                 v3s16(1, 0, 0),
1479                                 v3s16(-1, 0, 0),
1480                                 v3s16(0, 0, 1),
1481                                 v3s16(0, 0, -1)
1482                         };
1483                         TileSpec tiles[6];
1484
1485                         u16 l = getInteriorLight(n, 1, nodedef);
1486                         video::SColor c = MapBlock_LightColor(255, l, f.light_source);
1487
1488                         v3f pos = intToFloat(p, BS);
1489
1490                         std::vector<aabb3f> boxes = n.getNodeBoxes(nodedef);
1491                         for(std::vector<aabb3f>::iterator
1492                                         i = boxes.begin();
1493                                         i != boxes.end(); i++)
1494                         {
1495                         for(int j = 0; j < 6; j++)
1496                                 {
1497                                 // Handles facedir rotation for textures
1498                                 tiles[j] = getNodeTile(n, p, tile_dirs[j], data);
1499                                 }
1500                                 aabb3f box = *i;
1501                                 box.MinEdge += pos;
1502                                 box.MaxEdge += pos;
1503
1504                                 f32 temp;
1505                                 if (box.MinEdge.X > box.MaxEdge.X)
1506                                 {
1507                                         temp=box.MinEdge.X;
1508                                         box.MinEdge.X=box.MaxEdge.X;
1509                                         box.MaxEdge.X=temp;
1510                                 }
1511                                 if (box.MinEdge.Y > box.MaxEdge.Y)
1512                                 {
1513                                         temp=box.MinEdge.Y;
1514                                         box.MinEdge.Y=box.MaxEdge.Y;
1515                                         box.MaxEdge.Y=temp;
1516                                 }
1517                                 if (box.MinEdge.Z > box.MaxEdge.Z)
1518                                 {
1519                                         temp=box.MinEdge.Z;
1520                                         box.MinEdge.Z=box.MaxEdge.Z;
1521                                         box.MaxEdge.Z=temp;
1522                                 }
1523
1524                                 //
1525                                 // Compute texture coords
1526                                 f32 tx1 = (box.MinEdge.X/BS)+0.5;
1527                                 f32 ty1 = (box.MinEdge.Y/BS)+0.5;
1528                                 f32 tz1 = (box.MinEdge.Z/BS)+0.5;
1529                                 f32 tx2 = (box.MaxEdge.X/BS)+0.5;
1530                                 f32 ty2 = (box.MaxEdge.Y/BS)+0.5;
1531                                 f32 tz2 = (box.MaxEdge.Z/BS)+0.5;
1532                                 f32 txc[24] = {
1533                                         // up
1534                                         tx1, 1-tz2, tx2, 1-tz1,
1535                                         // down
1536                                         tx1, tz1, tx2, tz2,
1537                                         // right
1538                                         tz1, 1-ty2, tz2, 1-ty1,
1539                                         // left
1540                                         1-tz2, 1-ty2, 1-tz1, 1-ty1,
1541                                         // back
1542                                         1-tx2, 1-ty2, 1-tx1, 1-ty1,
1543                                         // front
1544                                         tx1, 1-ty2, tx2, 1-ty1,
1545                                 };
1546                                 makeCuboid(&collector, box, tiles, 6, c, txc);
1547                         }
1548                 break;}
1549                 }
1550         }
1551 }
1552