src/clientmap.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 "clientmap.h"
  21 #include "client.h"
  22 #include "mapblock_mesh.h"
  23 #include <IMaterialRenderer.h>
  24 #include <matrix4.h>
  25 #include "log.h"
  26 #include "mapsector.h"
  27 #include "nodedef.h"
  28 #include "mapblock.h"
  29 #include "profiler.h"
  30 #include "settings.h"
  31 #include "camera.h"               // CameraModes
  32 #include "util/mathconstants.h"
  33 #include <algorithm>
  34
  35 #define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"
  36
  37 ClientMap::ClientMap(
  38                 Client *client,
  39                 IGameDef *gamedef,
  40                 MapDrawControl &control,
  41                 scene::ISceneNode* parent,
  42                 scene::ISceneManager* mgr,
  43                 s32 id
  44 ):
  45         Map(dout_client, gamedef),
  46         scene::ISceneNode(parent, mgr, id),
  47         m_client(client),
  48         m_control(control),
  49         m_camera_position(0,0,0),
  50         m_camera_direction(0,0,1),
  51         m_camera_fov(M_PI)
  52 {
  53         m_box = core::aabbox3d<f32>(-BS*1000000,-BS*1000000,-BS*1000000,
  54                         BS*1000000,BS*1000000,BS*1000000);
  55
  56         /* TODO: Add a callback function so these can be updated when a setting
  57          *       changes.  At this point in time it doesn't matter (e.g. /set
  58          *       is documented to change server settings only)
  59          *
  60          * TODO: Local caching of settings is not optimal and should at some stage
  61          *       be updated to use a global settings object for getting thse values
  62          *       (as opposed to the this local caching). This can be addressed in
  63          *       a later release.
  64          */
  65         m_cache_trilinear_filter  = g_settings->getBool("trilinear_filter");
  66         m_cache_bilinear_filter   = g_settings->getBool("bilinear_filter");
  67         m_cache_anistropic_filter = g_settings->getBool("anisotropic_filter");
  68
  69 }
  70
  71 ClientMap::~ClientMap()
  72 {
  73         /*MutexAutoLock lock(mesh_mutex);
  74
  75         if(mesh != NULL)
  76         {
  77                 mesh->drop();
  78                 mesh = NULL;
  79         }*/
  80 }
  81
  82 MapSector * ClientMap::emergeSector(v2s16 p2d)
  83 {
  84         DSTACK(FUNCTION_NAME);
  85         // Check that it doesn't exist already
  86         try{
  87                 return getSectorNoGenerate(p2d);
  88         }
  89         catch(InvalidPositionException &e)
  90         {
  91         }
  92
  93         // Create a sector
  94         ClientMapSector *sector = new ClientMapSector(this, p2d, m_gamedef);
  95
  96         {
  97                 //MutexAutoLock lock(m_sector_mutex); // Bulk comment-out
  98                 m_sectors[p2d] = sector;
  99         }
 100
 101         return sector;
 102 }
 103
 104 void ClientMap::OnRegisterSceneNode()
 105 {
 106         if(IsVisible)
 107         {
 108                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
 109                 SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
 110         }
 111
 112         ISceneNode::OnRegisterSceneNode();
 113 }
 114
 115 static bool isOccluded(Map *map, v3s16 p0, v3s16 p1, float step, float stepfac,
 116                 float start_off, float end_off, u32 needed_count, INodeDefManager *nodemgr)
 117 {
 118         float d0 = (float)BS * p0.getDistanceFrom(p1);
 119         v3s16 u0 = p1 - p0;
 120         v3f uf = v3f(u0.X, u0.Y, u0.Z) * BS;
 121         uf.normalize();
 122         v3f p0f = v3f(p0.X, p0.Y, p0.Z) * BS;
 123         u32 count = 0;
 124         for(float s=start_off; s<d0+end_off; s+=step){
 125                 v3f pf = p0f + uf * s;
 126                 v3s16 p = floatToInt(pf, BS);
 127                 MapNode n = map->getNodeNoEx(p);
 128                 bool is_transparent = false;
 129                 const ContentFeatures &f = nodemgr->get(n);
 130                 if(f.solidness == 0)
 131                         is_transparent = (f.visual_solidness != 2);
 132                 else
 133                         is_transparent = (f.solidness != 2);
 134                 if(!is_transparent){
 135                         if(count == needed_count)
 136                                 return true;
 137                         count++;
 138                 }
 139                 step *= stepfac;
 140         }
 141         return false;
 142 }
 143
 144 void ClientMap::updateDrawList(video::IVideoDriver* driver)
 145 {
 146         ScopeProfiler sp(g_profiler, "CM::updateDrawList()", SPT_AVG);
 147         g_profiler->add("CM::updateDrawList() count", 1);
 148
 149         INodeDefManager *nodemgr = m_gamedef->ndef();
 150
 151         for(std::map<v3s16, MapBlock*>::iterator
 152                         i = m_drawlist.begin();
 153                         i != m_drawlist.end(); ++i)
 154         {
 155                 MapBlock *block = i->second;
 156                 block->refDrop();
 157         }
 158         m_drawlist.clear();
 159
 160         m_camera_mutex.lock();
 161         v3f camera_position = m_camera_position;
 162         v3f camera_direction = m_camera_direction;
 163         f32 camera_fov = m_camera_fov;
 164         //v3s16 camera_offset = m_camera_offset;
 165         m_camera_mutex.unlock();
 166
 167         // Use a higher fov to accomodate faster camera movements.
 168         // Blocks are cropped better when they are drawn.
 169         // Or maybe they aren't? Well whatever.
 170         camera_fov *= 1.2;
 171
 172         v3s16 cam_pos_nodes = floatToInt(camera_position, BS);
 173         v3s16 box_nodes_d = m_control.wanted_range * v3s16(1,1,1);
 174         v3s16 p_nodes_min = cam_pos_nodes - box_nodes_d;
 175         v3s16 p_nodes_max = cam_pos_nodes + box_nodes_d;
 176         // Take a fair amount as we will be dropping more out later
 177         // Umm... these additions are a bit strange but they are needed.
 178         v3s16 p_blocks_min(
 179                         p_nodes_min.X / MAP_BLOCKSIZE - 3,
 180                         p_nodes_min.Y / MAP_BLOCKSIZE - 3,
 181                         p_nodes_min.Z / MAP_BLOCKSIZE - 3);
 182         v3s16 p_blocks_max(
 183                         p_nodes_max.X / MAP_BLOCKSIZE + 1,
 184                         p_nodes_max.Y / MAP_BLOCKSIZE + 1,
 185                         p_nodes_max.Z / MAP_BLOCKSIZE + 1);
 186
 187         // Number of blocks in rendering range
 188         u32 blocks_in_range = 0;
 189         // Number of blocks occlusion culled
 190         u32 blocks_occlusion_culled = 0;
 191         // Number of blocks in rendering range but don't have a mesh
 192         u32 blocks_in_range_without_mesh = 0;
 193         // Blocks that had mesh that would have been drawn according to
 194         // rendering range (if max blocks limit didn't kick in)
 195         u32 blocks_would_have_drawn = 0;
 196         // Blocks that were drawn and had a mesh
 197         u32 blocks_drawn = 0;
 198         // Blocks which had a corresponding meshbuffer for this pass
 199         //u32 blocks_had_pass_meshbuf = 0;
 200         // Blocks from which stuff was actually drawn
 201         //u32 blocks_without_stuff = 0;
 202         // Distance to farthest drawn block
 203         float farthest_drawn = 0;
 204
 205         for(std::map<v2s16, MapSector*>::iterator
 206                         si = m_sectors.begin();
 207                         si != m_sectors.end(); ++si)
 208         {
 209                 MapSector *sector = si->second;
 210                 v2s16 sp = sector->getPos();
 211
 212                 if(m_control.range_all == false)
 213                 {
 214                         if(sp.X < p_blocks_min.X
 215                         || sp.X > p_blocks_max.X
 216                         || sp.Y < p_blocks_min.Z
 217                         || sp.Y > p_blocks_max.Z)
 218                                 continue;
 219                 }
 220
 221                 MapBlockVect sectorblocks;
 222                 sector->getBlocks(sectorblocks);
 223
 224                 /*
 225                         Loop through blocks in sector
 226                 */
 227
 228                 u32 sector_blocks_drawn = 0;
 229
 230                 for(MapBlockVect::iterator i = sectorblocks.begin();
 231                                 i != sectorblocks.end(); ++i)
 232                 {
 233                         MapBlock *block = *i;
 234
 235                         /*
 236                                 Compare block position to camera position, skip
 237                                 if not seen on display
 238                         */
 239
 240                         if (block->mesh != NULL)
 241                                 block->mesh->updateCameraOffset(m_camera_offset);
 242
 243                         float range = 100000 * BS;
 244                         if(m_control.range_all == false)
 245                                 range = m_control.wanted_range * BS;
 246
 247                         float d = 0.0;
 248                         if(isBlockInSight(block->getPos(), camera_position,
 249                                         camera_direction, camera_fov,
 250                                         range, &d) == false)
 251                         {
 252                                 continue;
 253                         }
 254
 255                         // This is ugly (spherical distance limit?)
 256                         /*if(m_control.range_all == false &&
 257                                         d - 0.5*BS*MAP_BLOCKSIZE > range)
 258                                 continue;*/
 259
 260                         blocks_in_range++;
 261
 262                         /*
 263                                 Ignore if mesh doesn't exist
 264                         */
 265                         {
 266                                 //MutexAutoLock lock(block->mesh_mutex);
 267
 268                                 if(block->mesh == NULL){
 269                                         blocks_in_range_without_mesh++;
 270                                         continue;
 271                                 }
 272                         }
 273
 274                         /*
 275                                 Occlusion culling
 276                         */
 277
 278                         // No occlusion culling when free_move is on and camera is
 279                         // inside ground
 280                         bool occlusion_culling_enabled = true;
 281                         if(g_settings->getBool("free_move")){
 282                                 MapNode n = getNodeNoEx(cam_pos_nodes);
 283                                 if(n.getContent() == CONTENT_IGNORE ||
 284                                                 nodemgr->get(n).solidness == 2)
 285                                         occlusion_culling_enabled = false;
 286                         }
 287
 288                         v3s16 cpn = block->getPos() * MAP_BLOCKSIZE;
 289                         cpn += v3s16(MAP_BLOCKSIZE/2, MAP_BLOCKSIZE/2, MAP_BLOCKSIZE/2);
 290                         float step = BS*1;
 291                         float stepfac = 1.1;
 292                         float startoff = BS*1;
 293                         float endoff = -BS*MAP_BLOCKSIZE*1.42*1.42;
 294                         v3s16 spn = cam_pos_nodes + v3s16(0,0,0);
 295                         s16 bs2 = MAP_BLOCKSIZE/2 + 1;
 296                         u32 needed_count = 1;
 297                         if(
 298                                 occlusion_culling_enabled &&
 299                                 isOccluded(this, spn, cpn + v3s16(0,0,0),
 300                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 301                                 isOccluded(this, spn, cpn + v3s16(bs2,bs2,bs2),
 302                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 303                                 isOccluded(this, spn, cpn + v3s16(bs2,bs2,-bs2),
 304                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 305                                 isOccluded(this, spn, cpn + v3s16(bs2,-bs2,bs2),
 306                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 307                                 isOccluded(this, spn, cpn + v3s16(bs2,-bs2,-bs2),
 308                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 309                                 isOccluded(this, spn, cpn + v3s16(-bs2,bs2,bs2),
 310                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 311                                 isOccluded(this, spn, cpn + v3s16(-bs2,bs2,-bs2),
 312                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 313                                 isOccluded(this, spn, cpn + v3s16(-bs2,-bs2,bs2),
 314                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 315                                 isOccluded(this, spn, cpn + v3s16(-bs2,-bs2,-bs2),
 316                                         step, stepfac, startoff, endoff, needed_count, nodemgr)
 317                         )
 318                         {
 319                                 blocks_occlusion_culled++;
 320                                 continue;
 321                         }
 322
 323                         // This block is in range. Reset usage timer.
 324                         block->resetUsageTimer();
 325
 326                         // Limit block count in case of a sudden increase
 327                         blocks_would_have_drawn++;
 328                         if(blocks_drawn >= m_control.wanted_max_blocks
 329                                         && m_control.range_all == false
 330                                         && d > m_control.wanted_min_range * BS)
 331                                 continue;
 332
 333                         // Add to set
 334                         block->refGrab();
 335                         m_drawlist[block->getPos()] = block;
 336
 337                         sector_blocks_drawn++;
 338                         blocks_drawn++;
 339                         if(d/BS > farthest_drawn)
 340                                 farthest_drawn = d/BS;
 341
 342                 } // foreach sectorblocks
 343
 344                 if(sector_blocks_drawn != 0)
 345                         m_last_drawn_sectors.insert(sp);
 346         }
 347
 348         m_control.blocks_would_have_drawn = blocks_would_have_drawn;
 349         m_control.blocks_drawn = blocks_drawn;
 350         m_control.farthest_drawn = farthest_drawn;
 351
 352         g_profiler->avg("CM: blocks in range", blocks_in_range);
 353         g_profiler->avg("CM: blocks occlusion culled", blocks_occlusion_culled);
 354         if(blocks_in_range != 0)
 355                 g_profiler->avg("CM: blocks in range without mesh (frac)",
 356                                 (float)blocks_in_range_without_mesh/blocks_in_range);
 357         g_profiler->avg("CM: blocks drawn", blocks_drawn);
 358         g_profiler->avg("CM: farthest drawn", farthest_drawn);
 359         g_profiler->avg("CM: wanted max blocks", m_control.wanted_max_blocks);
 360 }
 361
 362 struct MeshBufList
 363 {
 364         video::SMaterial m;
 365         std::vector<scene::IMeshBuffer*> bufs;
 366 };
 367
 368 struct MeshBufListList
 369 {
 370         std::vector<MeshBufList> lists;
 371
 372         void clear()
 373         {
 374                 lists.clear();
 375         }
 376
 377         void add(scene::IMeshBuffer *buf)
 378         {
 379                 for(std::vector<MeshBufList>::iterator i = lists.begin();
 380                                 i != lists.end(); ++i){
 381                         MeshBufList &l = *i;
 382                         video::SMaterial &m = buf->getMaterial();
 383
 384                         // comparing a full material is quite expensive so we don't do it if
 385                         // not even first texture is equal
 386                         if (l.m.TextureLayer[0].Texture != m.TextureLayer[0].Texture)
 387                                 continue;
 388
 389                         if (l.m == m) {
 390                                 l.bufs.push_back(buf);
 391                                 return;
 392                         }
 393                 }
 394                 MeshBufList l;
 395                 l.m = buf->getMaterial();
 396                 l.bufs.push_back(buf);
 397                 lists.push_back(l);
 398         }
 399 };
 400
 401 void ClientMap::renderMap(video::IVideoDriver* driver, s32 pass)
 402 {
 403         DSTACK(FUNCTION_NAME);
 404
 405         bool is_transparent_pass = pass == scene::ESNRP_TRANSPARENT;
 406
 407         std::string prefix;
 408         if(pass == scene::ESNRP_SOLID)
 409                 prefix = "CM: solid: ";
 410         else
 411                 prefix = "CM: transparent: ";
 412
 413         /*
 414                 This is called two times per frame, reset on the non-transparent one
 415         */
 416         if(pass == scene::ESNRP_SOLID)
 417         {
 418                 m_last_drawn_sectors.clear();
 419         }
 420
 421         /*
 422                 Get time for measuring timeout.
 423
 424                 Measuring time is very useful for long delays when the
 425                 machine is swapping a lot.
 426         */
 427         int time1 = time(0);
 428
 429         /*
 430                 Get animation parameters
 431         */
 432         float animation_time = m_client->getAnimationTime();
 433         int crack = m_client->getCrackLevel();
 434         u32 daynight_ratio = m_client->getEnv().getDayNightRatio();
 435
 436         m_camera_mutex.lock();
 437         v3f camera_position = m_camera_position;
 438         v3f camera_direction = m_camera_direction;
 439         f32 camera_fov = m_camera_fov;
 440         m_camera_mutex.unlock();
 441
 442         /*
 443                 Get all blocks and draw all visible ones
 444         */
 445
 446         v3s16 cam_pos_nodes = floatToInt(camera_position, BS);
 447
 448         v3s16 box_nodes_d = m_control.wanted_range * v3s16(1,1,1);
 449
 450         v3s16 p_nodes_min = cam_pos_nodes - box_nodes_d;
 451         v3s16 p_nodes_max = cam_pos_nodes + box_nodes_d;
 452
 453         // Take a fair amount as we will be dropping more out later
 454         // Umm... these additions are a bit strange but they are needed.
 455         v3s16 p_blocks_min(
 456                         p_nodes_min.X / MAP_BLOCKSIZE - 3,
 457                         p_nodes_min.Y / MAP_BLOCKSIZE - 3,
 458                         p_nodes_min.Z / MAP_BLOCKSIZE - 3);
 459         v3s16 p_blocks_max(
 460                         p_nodes_max.X / MAP_BLOCKSIZE + 1,
 461                         p_nodes_max.Y / MAP_BLOCKSIZE + 1,
 462                         p_nodes_max.Z / MAP_BLOCKSIZE + 1);
 463
 464         u32 vertex_count = 0;
 465         u32 meshbuffer_count = 0;
 466
 467         // For limiting number of mesh animations per frame
 468         u32 mesh_animate_count = 0;
 469         u32 mesh_animate_count_far = 0;
 470
 471         // Blocks that were drawn and had a mesh
 472         u32 blocks_drawn = 0;
 473         // Blocks which had a corresponding meshbuffer for this pass
 474         u32 blocks_had_pass_meshbuf = 0;
 475         // Blocks from which stuff was actually drawn
 476         u32 blocks_without_stuff = 0;
 477
 478         /*
 479                 Draw the selected MapBlocks
 480         */
 481
 482         {
 483         ScopeProfiler sp(g_profiler, prefix+"drawing blocks", SPT_AVG);
 484
 485         MeshBufListList drawbufs;
 486
 487         for(std::map<v3s16, MapBlock*>::iterator
 488                         i = m_drawlist.begin();
 489                         i != m_drawlist.end(); ++i)
 490         {
 491                 MapBlock *block = i->second;
 492
 493                 // If the mesh of the block happened to get deleted, ignore it
 494                 if(block->mesh == NULL)
 495                         continue;
 496
 497                 float d = 0.0;
 498                 if(isBlockInSight(block->getPos(), camera_position,
 499                                 camera_direction, camera_fov,
 500                                 100000*BS, &d) == false)
 501                 {
 502                         continue;
 503                 }
 504
 505                 // Mesh animation
 506                 {
 507                         //MutexAutoLock lock(block->mesh_mutex);
 508                         MapBlockMesh *mapBlockMesh = block->mesh;
 509                         assert(mapBlockMesh);
 510                         // Pretty random but this should work somewhat nicely
 511                         bool faraway = d >= BS*50;
 512                         //bool faraway = d >= m_control.wanted_range * BS;
 513                         if(mapBlockMesh->isAnimationForced() ||
 514                                         !faraway ||
 515                                         mesh_animate_count_far < (m_control.range_all ? 200 : 50))
 516                         {
 517                                 bool animated = mapBlockMesh->animate(
 518                                                 faraway,
 519                                                 animation_time,
 520                                                 crack,
 521                                                 daynight_ratio);
 522                                 if(animated)
 523                                         mesh_animate_count++;
 524                                 if(animated && faraway)
 525                                         mesh_animate_count_far++;
 526                         }
 527                         else
 528                         {
 529                                 mapBlockMesh->decreaseAnimationForceTimer();
 530                         }
 531                 }
 532
 533                 /*
 534                         Get the meshbuffers of the block
 535                 */
 536                 {
 537                         //MutexAutoLock lock(block->mesh_mutex);
 538
 539                         MapBlockMesh *mapBlockMesh = block->mesh;
 540                         assert(mapBlockMesh);
 541
 542                         scene::IMesh *mesh = mapBlockMesh->getMesh();
 543                         assert(mesh);
 544
 545                         u32 c = mesh->getMeshBufferCount();
 546                         for(u32 i=0; i<c; i++)
 547                         {
 548                                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 549
 550                                 buf->getMaterial().setFlag(video::EMF_TRILINEAR_FILTER, m_cache_trilinear_filter);
 551                                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, m_cache_bilinear_filter);
 552                                 buf->getMaterial().setFlag(video::EMF_ANISOTROPIC_FILTER, m_cache_anistropic_filter);
 553
 554                                 const video::SMaterial& material = buf->getMaterial();
 555                                 video::IMaterialRenderer* rnd =
 556                                                 driver->getMaterialRenderer(material.MaterialType);
 557                                 bool transparent = (rnd && rnd->isTransparent());
 558                                 if(transparent == is_transparent_pass)
 559                                 {
 560                                         if(buf->getVertexCount() == 0)
 561                                                 errorstream<<"Block ["<<analyze_block(block)
 562                                                                 <<"] contains an empty meshbuf"<<std::endl;
 563                                         drawbufs.add(buf);
 564                                 }
 565                         }
 566                 }
 567         }
 568
 569         std::vector<MeshBufList> &lists = drawbufs.lists;
 570
 571         int timecheck_counter = 0;
 572         for(std::vector<MeshBufList>::iterator i = lists.begin();
 573                         i != lists.end(); ++i) {
 574                 timecheck_counter++;
 575                 if(timecheck_counter > 50) {
 576                         timecheck_counter = 0;
 577                         int time2 = time(0);
 578                         if(time2 > time1 + 4) {
 579                                 infostream << "ClientMap::renderMap(): "
 580                                         "Rendering takes ages, returning."
 581                                         << std::endl;
 582                                 return;
 583                         }
 584                 }
 585
 586                 MeshBufList &list = *i;
 587
 588                 driver->setMaterial(list.m);
 589
 590                 for(std::vector<scene::IMeshBuffer*>::iterator j = list.bufs.begin();
 591                                 j != list.bufs.end(); ++j) {
 592                         scene::IMeshBuffer *buf = *j;
 593                         driver->drawMeshBuffer(buf);
 594                         vertex_count += buf->getVertexCount();
 595                         meshbuffer_count++;
 596                 }
 597
 598         }
 599         } // ScopeProfiler
 600
 601         // Log only on solid pass because values are the same
 602         if(pass == scene::ESNRP_SOLID){
 603                 g_profiler->avg("CM: animated meshes", mesh_animate_count);
 604                 g_profiler->avg("CM: animated meshes (far)", mesh_animate_count_far);
 605         }
 606
 607         g_profiler->avg(prefix+"vertices drawn", vertex_count);
 608         if(blocks_had_pass_meshbuf != 0)
 609                 g_profiler->avg(prefix+"meshbuffers per block",
 610                                 (float)meshbuffer_count / (float)blocks_had_pass_meshbuf);
 611         if(blocks_drawn != 0)
 612                 g_profiler->avg(prefix+"empty blocks (frac)",
 613                                 (float)blocks_without_stuff / blocks_drawn);
 614
 615         /*infostream<<"renderMap(): is_transparent_pass="<<is_transparent_pass
 616                         <<", rendered "<<vertex_count<<" vertices."<<std::endl;*/
 617 }
 618
 619 static bool getVisibleBrightness(Map *map, v3f p0, v3f dir, float step,
 620                 float step_multiplier, float start_distance, float end_distance,
 621                 INodeDefManager *ndef, u32 daylight_factor, float sunlight_min_d,
 622                 int *result, bool *sunlight_seen)
 623 {
 624         int brightness_sum = 0;
 625         int brightness_count = 0;
 626         float distance = start_distance;
 627         dir.normalize();
 628         v3f pf = p0;
 629         pf += dir * distance;
 630         int noncount = 0;
 631         bool nonlight_seen = false;
 632         bool allow_allowing_non_sunlight_propagates = false;
 633         bool allow_non_sunlight_propagates = false;
 634         // Check content nearly at camera position
 635         {
 636                 v3s16 p = floatToInt(p0 /*+ dir * 3*BS*/, BS);
 637                 MapNode n = map->getNodeNoEx(p);
 638                 if(ndef->get(n).param_type == CPT_LIGHT &&
 639                                 !ndef->get(n).sunlight_propagates)
 640                         allow_allowing_non_sunlight_propagates = true;
 641         }
 642         // If would start at CONTENT_IGNORE, start closer
 643         {
 644                 v3s16 p = floatToInt(pf, BS);
 645                 MapNode n = map->getNodeNoEx(p);
 646                 if(n.getContent() == CONTENT_IGNORE){
 647                         float newd = 2*BS;
 648                         pf = p0 + dir * 2*newd;
 649                         distance = newd;
 650                         sunlight_min_d = 0;
 651                 }
 652         }
 653         for(int i=0; distance < end_distance; i++){
 654                 pf += dir * step;
 655                 distance += step;
 656                 step *= step_multiplier;
 657
 658                 v3s16 p = floatToInt(pf, BS);
 659                 MapNode n = map->getNodeNoEx(p);
 660                 if(allow_allowing_non_sunlight_propagates && i == 0 &&
 661                                 ndef->get(n).param_type == CPT_LIGHT &&
 662                                 !ndef->get(n).sunlight_propagates){
 663                         allow_non_sunlight_propagates = true;
 664                 }
 665                 if(ndef->get(n).param_type != CPT_LIGHT ||
 666                                 (!ndef->get(n).sunlight_propagates &&
 667                                         !allow_non_sunlight_propagates)){
 668                         nonlight_seen = true;
 669                         noncount++;
 670                         if(noncount >= 4)
 671                                 break;
 672                         continue;
 673                 }
 674                 if(distance >= sunlight_min_d && *sunlight_seen == false
 675                                 && nonlight_seen == false)
 676                         if(n.getLight(LIGHTBANK_DAY, ndef) == LIGHT_SUN)
 677                                 *sunlight_seen = true;
 678                 noncount = 0;
 679                 brightness_sum += decode_light(n.getLightBlend(daylight_factor, ndef));
 680                 brightness_count++;
 681         }
 682         *result = 0;
 683         if(brightness_count == 0)
 684                 return false;
 685         *result = brightness_sum / brightness_count;
 686         /*std::cerr<<"Sampled "<<brightness_count<<" points; result="
 687                         <<(*result)<<std::endl;*/
 688         return true;
 689 }
 690
 691 int ClientMap::getBackgroundBrightness(float max_d, u32 daylight_factor,
 692                 int oldvalue, bool *sunlight_seen_result)
 693 {
 694         const bool debugprint = false;
 695         INodeDefManager *ndef = m_gamedef->ndef();
 696         static v3f z_directions[50] = {
 697                 v3f(-100, 0, 0)
 698         };
 699         static f32 z_offsets[sizeof(z_directions)/sizeof(*z_directions)] = {
 700                 -1000,
 701         };
 702         if(z_directions[0].X < -99){
 703                 for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 704                         z_directions[i] = v3f(
 705                                 0.01 * myrand_range(-100, 100),
 706                                 1.0,
 707                                 0.01 * myrand_range(-100, 100)
 708                         );
 709                         z_offsets[i] = 0.01 * myrand_range(0,100);
 710                 }
 711         }
 712         if(debugprint)
 713                 std::cerr<<"In goes "<<PP(m_camera_direction)<<", out comes ";
 714         int sunlight_seen_count = 0;
 715         float sunlight_min_d = max_d*0.8;
 716         if(sunlight_min_d > 35*BS)
 717                 sunlight_min_d = 35*BS;
 718         std::vector<int> values;
 719         for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 720                 v3f z_dir = z_directions[i];
 721                 z_dir.normalize();
 722                 core::CMatrix4<f32> a;
 723                 a.buildRotateFromTo(v3f(0,1,0), z_dir);
 724                 v3f dir = m_camera_direction;
 725                 a.rotateVect(dir);
 726                 int br = 0;
 727                 float step = BS*1.5;
 728                 if(max_d > 35*BS)
 729                         step = max_d / 35 * 1.5;
 730                 float off = step * z_offsets[i];
 731                 bool sunlight_seen_now = false;
 732                 bool ok = getVisibleBrightness(this, m_camera_position, dir,
 733                                 step, 1.0, max_d*0.6+off, max_d, ndef, daylight_factor,
 734                                 sunlight_min_d,
 735                                 &br, &sunlight_seen_now);
 736                 if(sunlight_seen_now)
 737                         sunlight_seen_count++;
 738                 if(!ok)
 739                         continue;
 740                 values.push_back(br);
 741                 // Don't try too much if being in the sun is clear
 742                 if(sunlight_seen_count >= 20)
 743                         break;
 744         }
 745         int brightness_sum = 0;
 746         int brightness_count = 0;
 747         std::sort(values.begin(), values.end());
 748         u32 num_values_to_use = values.size();
 749         if(num_values_to_use >= 10)
 750                 num_values_to_use -= num_values_to_use/2;
 751         else if(num_values_to_use >= 7)
 752                 num_values_to_use -= num_values_to_use/3;
 753         u32 first_value_i = (values.size() - num_values_to_use) / 2;
 754         if(debugprint){
 755                 for(u32 i=0; i < first_value_i; i++)
 756                         std::cerr<<values[i]<<" ";
 757                 std::cerr<<"[";
 758         }
 759         for(u32 i=first_value_i; i < first_value_i+num_values_to_use; i++){
 760                 if(debugprint)
 761                         std::cerr<<values[i]<<" ";
 762                 brightness_sum += values[i];
 763                 brightness_count++;
 764         }
 765         if(debugprint){
 766                 std::cerr<<"]";
 767                 for(u32 i=first_value_i+num_values_to_use; i < values.size(); i++)
 768                         std::cerr<<values[i]<<" ";
 769         }
 770         int ret = 0;
 771         if(brightness_count == 0){
 772                 MapNode n = getNodeNoEx(floatToInt(m_camera_position, BS));
 773                 if(ndef->get(n).param_type == CPT_LIGHT){
 774                         ret = decode_light(n.getLightBlend(daylight_factor, ndef));
 775                 } else {
 776                         ret = oldvalue;
 777                 }
 778         } else {
 779                 /*float pre = (float)brightness_sum / (float)brightness_count;
 780                 float tmp = pre;
 781                 const float d = 0.2;
 782                 pre *= 1.0 + d*2;
 783                 pre -= tmp * d;
 784                 int preint = pre;
 785                 ret = MYMAX(0, MYMIN(255, preint));*/
 786                 ret = brightness_sum / brightness_count;
 787         }
 788         if(debugprint)
 789                 std::cerr<<"Result: "<<ret<<" sunlight_seen_count="
 790                                 <<sunlight_seen_count<<std::endl;
 791         *sunlight_seen_result = (sunlight_seen_count > 0);
 792         return ret;
 793 }
 794
 795 void ClientMap::renderPostFx(CameraMode cam_mode)
 796 {
 797         INodeDefManager *nodemgr = m_gamedef->ndef();
 798
 799         // Sadly ISceneManager has no "post effects" render pass, in that case we
 800         // could just register for that and handle it in renderMap().
 801
 802         m_camera_mutex.lock();
 803         v3f camera_position = m_camera_position;
 804         m_camera_mutex.unlock();
 805
 806         MapNode n = getNodeNoEx(floatToInt(camera_position, BS));
 807
 808         // - If the player is in a solid node, make everything black.
 809         // - If the player is in liquid, draw a semi-transparent overlay.
 810         // - Do not if player is in third person mode
 811         const ContentFeatures& features = nodemgr->get(n);
 812         video::SColor post_effect_color = features.post_effect_color;
 813         if(features.solidness == 2 && !(g_settings->getBool("noclip") &&
 814                         m_gamedef->checkLocalPrivilege("noclip")) &&
 815                         cam_mode == CAMERA_MODE_FIRST)
 816         {
 817                 post_effect_color = video::SColor(255, 0, 0, 0);
 818         }
 819         if (post_effect_color.getAlpha() != 0)
 820         {
 821                 // Draw a full-screen rectangle
 822                 video::IVideoDriver* driver = SceneManager->getVideoDriver();
 823                 v2u32 ss = driver->getScreenSize();
 824                 core::rect<s32> rect(0,0, ss.X, ss.Y);
 825                 driver->draw2DRectangle(post_effect_color, rect);
 826         }
 827 }
 828
 829 void ClientMap::PrintInfo(std::ostream &out)
 830 {
 831         out<<"ClientMap: ";
 832 }
 833
 834