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 "main.h" // dout_client, g_settings
  28 #include "nodedef.h"
  29 #include "mapblock.h"
  30 #include "profiler.h"
  31 #include "settings.h"
  32 #include "camera.h" // CameraModes
  33 #include "util/mathconstants.h"
  34 #include <algorithm>
  35
  36 #define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"
  37
  38 ClientMap::ClientMap(
  39                 Client *client,
  40                 IGameDef *gamedef,
  41                 MapDrawControl &control,
  42                 scene::ISceneNode* parent,
  43                 scene::ISceneManager* mgr,
  44                 s32 id
  45 ):
  46         Map(dout_client, gamedef),
  47         scene::ISceneNode(parent, mgr, id),
  48         m_client(client),
  49         m_control(control),
  50         m_camera_position(0,0,0),
  51         m_camera_direction(0,0,1),
  52         m_camera_fov(M_PI)
  53 {
  54         m_box = core::aabbox3d<f32>(-BS*1000000,-BS*1000000,-BS*1000000,
  55                         BS*1000000,BS*1000000,BS*1000000);
  56
  57         /* TODO: Add a callback function so these can be updated when a setting
  58          *       changes.  At this point in time it doesn't matter (e.g. /set
  59          *       is documented to change server settings only)
  60          *
  61          * TODO: Local caching of settings is not optimal and should at some stage
  62          *       be updated to use a global settings object for getting thse values
  63          *       (as opposed to the this local caching). This can be addressed in
  64          *       a later release.
  65          */
  66         m_cache_trilinear_filter  = g_settings->getBool("trilinear_filter");
  67         m_cache_bilinear_filter   = g_settings->getBool("bilinear_filter");
  68         m_cache_anistropic_filter = g_settings->getBool("anisotropic_filter");
  69
  70 }
  71
  72 ClientMap::~ClientMap()
  73 {
  74         /*JMutexAutoLock lock(mesh_mutex);
  75
  76         if(mesh != NULL)
  77         {
  78                 mesh->drop();
  79                 mesh = NULL;
  80         }*/
  81 }
  82
  83 MapSector * ClientMap::emergeSector(v2s16 p2d)
  84 {
  85         DSTACK(__FUNCTION_NAME);
  86         // Check that it doesn't exist already
  87         try{
  88                 return getSectorNoGenerate(p2d);
  89         }
  90         catch(InvalidPositionException &e)
  91         {
  92         }
  93
  94         // Create a sector
  95         ClientMapSector *sector = new ClientMapSector(this, p2d, m_gamedef);
  96
  97         {
  98                 //JMutexAutoLock lock(m_sector_mutex); // Bulk comment-out
  99                 m_sectors[p2d] = sector;
 100         }
 101
 102         return sector;
 103 }
 104
 105 void ClientMap::OnRegisterSceneNode()
 106 {
 107         if(IsVisible)
 108         {
 109                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
 110                 SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
 111         }
 112
 113         ISceneNode::OnRegisterSceneNode();
 114 }
 115
 116 static bool isOccluded(Map *map, v3s16 p0, v3s16 p1, float step, float stepfac,
 117                 float start_off, float end_off, u32 needed_count, INodeDefManager *nodemgr)
 118 {
 119         float d0 = (float)BS * p0.getDistanceFrom(p1);
 120         v3s16 u0 = p1 - p0;
 121         v3f uf = v3f(u0.X, u0.Y, u0.Z) * BS;
 122         uf.normalize();
 123         v3f p0f = v3f(p0.X, p0.Y, p0.Z) * BS;
 124         u32 count = 0;
 125         for(float s=start_off; s<d0+end_off; s+=step){
 126                 v3f pf = p0f + uf * s;
 127                 v3s16 p = floatToInt(pf, BS);
 128                 MapNode n = map->getNodeNoEx(p);
 129                 bool is_transparent = false;
 130                 const ContentFeatures &f = nodemgr->get(n);
 131                 if(f.solidness == 0)
 132                         is_transparent = (f.visual_solidness != 2);
 133                 else
 134                         is_transparent = (f.solidness != 2);
 135                 if(!is_transparent){
 136                         if(count == needed_count)
 137                                 return true;
 138                         count++;
 139                 }
 140                 step *= stepfac;
 141         }
 142         return false;
 143 }
 144
 145 void ClientMap::updateDrawList(video::IVideoDriver* driver)
 146 {
 147         ScopeProfiler sp(g_profiler, "CM::updateDrawList()", SPT_AVG);
 148         g_profiler->add("CM::updateDrawList() count", 1);
 149
 150         INodeDefManager *nodemgr = m_gamedef->ndef();
 151
 152         for(std::map<v3s16, MapBlock*>::iterator
 153                         i = m_drawlist.begin();
 154                         i != m_drawlist.end(); ++i)
 155         {
 156                 MapBlock *block = i->second;
 157                 block->refDrop();
 158         }
 159         m_drawlist.clear();
 160
 161         m_camera_mutex.Lock();
 162         v3f camera_position = m_camera_position;
 163         v3f camera_direction = m_camera_direction;
 164         f32 camera_fov = m_camera_fov;
 165         //v3s16 camera_offset = m_camera_offset;
 166         m_camera_mutex.Unlock();
 167
 168         // Use a higher fov to accomodate faster camera movements.
 169         // Blocks are cropped better when they are drawn.
 170         // Or maybe they aren't? Well whatever.
 171         camera_fov *= 1.2;
 172
 173         v3s16 cam_pos_nodes = floatToInt(camera_position, BS);
 174         v3s16 box_nodes_d = m_control.wanted_range * v3s16(1,1,1);
 175         v3s16 p_nodes_min = cam_pos_nodes - box_nodes_d;
 176         v3s16 p_nodes_max = cam_pos_nodes + box_nodes_d;
 177         // Take a fair amount as we will be dropping more out later
 178         // Umm... these additions are a bit strange but they are needed.
 179         v3s16 p_blocks_min(
 180                         p_nodes_min.X / MAP_BLOCKSIZE - 3,
 181                         p_nodes_min.Y / MAP_BLOCKSIZE - 3,
 182                         p_nodes_min.Z / MAP_BLOCKSIZE - 3);
 183         v3s16 p_blocks_max(
 184                         p_nodes_max.X / MAP_BLOCKSIZE + 1,
 185                         p_nodes_max.Y / MAP_BLOCKSIZE + 1,
 186                         p_nodes_max.Z / MAP_BLOCKSIZE + 1);
 187
 188         // Number of blocks in rendering range
 189         u32 blocks_in_range = 0;
 190         // Number of blocks occlusion culled
 191         u32 blocks_occlusion_culled = 0;
 192         // Number of blocks in rendering range but don't have a mesh
 193         u32 blocks_in_range_without_mesh = 0;
 194         // Blocks that had mesh that would have been drawn according to
 195         // rendering range (if max blocks limit didn't kick in)
 196         u32 blocks_would_have_drawn = 0;
 197         // Blocks that were drawn and had a mesh
 198         u32 blocks_drawn = 0;
 199         // Blocks which had a corresponding meshbuffer for this pass
 200         //u32 blocks_had_pass_meshbuf = 0;
 201         // Blocks from which stuff was actually drawn
 202         //u32 blocks_without_stuff = 0;
 203         // Distance to farthest drawn block
 204         float farthest_drawn = 0;
 205
 206         for(std::map<v2s16, MapSector*>::iterator
 207                         si = m_sectors.begin();
 208                         si != m_sectors.end(); ++si)
 209         {
 210                 MapSector *sector = si->second;
 211                 v2s16 sp = sector->getPos();
 212
 213                 if(m_control.range_all == false)
 214                 {
 215                         if(sp.X < p_blocks_min.X
 216                         || sp.X > p_blocks_max.X
 217                         || sp.Y < p_blocks_min.Z
 218                         || sp.Y > p_blocks_max.Z)
 219                                 continue;
 220                 }
 221
 222                 MapBlockVect sectorblocks;
 223                 sector->getBlocks(sectorblocks);
 224
 225                 /*
 226                         Loop through blocks in sector
 227                 */
 228
 229                 u32 sector_blocks_drawn = 0;
 230
 231                 for(MapBlockVect::iterator i = sectorblocks.begin();
 232                                 i != sectorblocks.end(); i++)
 233                 {
 234                         MapBlock *block = *i;
 235
 236                         /*
 237                                 Compare block position to camera position, skip
 238                                 if not seen on display
 239                         */
 240
 241                         if (block->mesh != NULL)
 242                                 block->mesh->updateCameraOffset(m_camera_offset);
 243
 244                         float range = 100000 * BS;
 245                         if(m_control.range_all == false)
 246                                 range = m_control.wanted_range * BS;
 247
 248                         float d = 0.0;
 249                         if(isBlockInSight(block->getPos(), camera_position,
 250                                         camera_direction, camera_fov,
 251                                         range, &d) == false)
 252                         {
 253                                 continue;
 254                         }
 255
 256                         // This is ugly (spherical distance limit?)
 257                         /*if(m_control.range_all == false &&
 258                                         d - 0.5*BS*MAP_BLOCKSIZE > range)
 259                                 continue;*/
 260
 261                         blocks_in_range++;
 262
 263                         /*
 264                                 Ignore if mesh doesn't exist
 265                         */
 266                         {
 267                                 //JMutexAutoLock lock(block->mesh_mutex);
 268
 269                                 if(block->mesh == NULL){
 270                                         blocks_in_range_without_mesh++;
 271                                         continue;
 272                                 }
 273                         }
 274
 275                         /*
 276                                 Occlusion culling
 277                         */
 278
 279                         // No occlusion culling when free_move is on and camera is
 280                         // inside ground
 281                         bool occlusion_culling_enabled = true;
 282                         if(g_settings->getBool("free_move")){
 283                                 MapNode n = getNodeNoEx(cam_pos_nodes);
 284                                 if(n.getContent() == CONTENT_IGNORE ||
 285                                                 nodemgr->get(n).solidness == 2)
 286                                         occlusion_culling_enabled = false;
 287                         }
 288
 289                         v3s16 cpn = block->getPos() * MAP_BLOCKSIZE;
 290                         cpn += v3s16(MAP_BLOCKSIZE/2, MAP_BLOCKSIZE/2, MAP_BLOCKSIZE/2);
 291                         float step = BS*1;
 292                         float stepfac = 1.1;
 293                         float startoff = BS*1;
 294                         float endoff = -BS*MAP_BLOCKSIZE*1.42*1.42;
 295                         v3s16 spn = cam_pos_nodes + v3s16(0,0,0);
 296                         s16 bs2 = MAP_BLOCKSIZE/2 + 1;
 297                         u32 needed_count = 1;
 298                         if(
 299                                 occlusion_culling_enabled &&
 300                                 isOccluded(this, spn, cpn + v3s16(0,0,0),
 301                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 302                                 isOccluded(this, spn, cpn + v3s16(bs2,bs2,bs2),
 303                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 304                                 isOccluded(this, spn, cpn + v3s16(bs2,bs2,-bs2),
 305                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 306                                 isOccluded(this, spn, cpn + v3s16(bs2,-bs2,bs2),
 307                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 308                                 isOccluded(this, spn, cpn + v3s16(bs2,-bs2,-bs2),
 309                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 310                                 isOccluded(this, spn, cpn + v3s16(-bs2,bs2,bs2),
 311                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 312                                 isOccluded(this, spn, cpn + v3s16(-bs2,bs2,-bs2),
 313                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 314                                 isOccluded(this, spn, cpn + v3s16(-bs2,-bs2,bs2),
 315                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 316                                 isOccluded(this, spn, cpn + v3s16(-bs2,-bs2,-bs2),
 317                                         step, stepfac, startoff, endoff, needed_count, nodemgr)
 318                         )
 319                         {
 320                                 blocks_occlusion_culled++;
 321                                 continue;
 322                         }
 323
 324                         // This block is in range. Reset usage timer.
 325                         block->resetUsageTimer();
 326
 327                         // Limit block count in case of a sudden increase
 328                         blocks_would_have_drawn++;
 329                         if(blocks_drawn >= m_control.wanted_max_blocks
 330                                         && m_control.range_all == false
 331                                         && d > m_control.wanted_min_range * BS)
 332                                 continue;
 333
 334                         // Add to set
 335                         block->refGrab();
 336                         m_drawlist[block->getPos()] = block;
 337
 338                         sector_blocks_drawn++;
 339                         blocks_drawn++;
 340                         if(d/BS > farthest_drawn)
 341                                 farthest_drawn = d/BS;
 342
 343                 } // foreach sectorblocks
 344
 345                 if(sector_blocks_drawn != 0)
 346                         m_last_drawn_sectors.insert(sp);
 347         }
 348
 349         m_control.blocks_would_have_drawn = blocks_would_have_drawn;
 350         m_control.blocks_drawn = blocks_drawn;
 351         m_control.farthest_drawn = farthest_drawn;
 352
 353         g_profiler->avg("CM: blocks in range", blocks_in_range);
 354         g_profiler->avg("CM: blocks occlusion culled", blocks_occlusion_culled);
 355         if(blocks_in_range != 0)
 356                 g_profiler->avg("CM: blocks in range without mesh (frac)",
 357                                 (float)blocks_in_range_without_mesh/blocks_in_range);
 358         g_profiler->avg("CM: blocks drawn", blocks_drawn);
 359         g_profiler->avg("CM: farthest drawn", farthest_drawn);
 360         g_profiler->avg("CM: wanted max blocks", m_control.wanted_max_blocks);
 361 }
 362
 363 struct MeshBufList
 364 {
 365         video::SMaterial m;
 366         std::vector<scene::IMeshBuffer*> bufs;
 367 };
 368
 369 struct MeshBufListList
 370 {
 371         std::vector<MeshBufList> lists;
 372
 373         void clear()
 374         {
 375                 lists.clear();
 376         }
 377
 378         void add(scene::IMeshBuffer *buf)
 379         {
 380                 for(std::vector<MeshBufList>::iterator i = lists.begin();
 381                                 i != lists.end(); ++i){
 382                         MeshBufList &l = *i;
 383                         video::SMaterial &m = buf->getMaterial();
 384
 385                         // comparing a full material is quite expensive so we don't do it if
 386                         // not even first texture is equal
 387                         if (l.m.TextureLayer[0].Texture != m.TextureLayer[0].Texture)
 388                                 continue;
 389
 390                         if (l.m == m) {
 391                                 l.bufs.push_back(buf);
 392                                 return;
 393                         }
 394                 }
 395                 MeshBufList l;
 396                 l.m = buf->getMaterial();
 397                 l.bufs.push_back(buf);
 398                 lists.push_back(l);
 399         }
 400 };
 401
 402 void ClientMap::renderMap(video::IVideoDriver* driver, s32 pass)
 403 {
 404         DSTACK(__FUNCTION_NAME);
 405
 406         bool is_transparent_pass = pass == scene::ESNRP_TRANSPARENT;
 407
 408         std::string prefix;
 409         if(pass == scene::ESNRP_SOLID)
 410                 prefix = "CM: solid: ";
 411         else
 412                 prefix = "CM: transparent: ";
 413
 414         /*
 415                 This is called two times per frame, reset on the non-transparent one
 416         */
 417         if(pass == scene::ESNRP_SOLID)
 418         {
 419                 m_last_drawn_sectors.clear();
 420         }
 421
 422         /*
 423                 Get time for measuring timeout.
 424
 425                 Measuring time is very useful for long delays when the
 426                 machine is swapping a lot.
 427         */
 428         int time1 = time(0);
 429
 430         /*
 431                 Get animation parameters
 432         */
 433         float animation_time = m_client->getAnimationTime();
 434         int crack = m_client->getCrackLevel();
 435         u32 daynight_ratio = m_client->getEnv().getDayNightRatio();
 436
 437         m_camera_mutex.Lock();
 438         v3f camera_position = m_camera_position;
 439         v3f camera_direction = m_camera_direction;
 440         f32 camera_fov = m_camera_fov;
 441         m_camera_mutex.Unlock();
 442
 443         /*
 444                 Get all blocks and draw all visible ones
 445         */
 446
 447         v3s16 cam_pos_nodes = floatToInt(camera_position, BS);
 448
 449         v3s16 box_nodes_d = m_control.wanted_range * v3s16(1,1,1);
 450
 451         v3s16 p_nodes_min = cam_pos_nodes - box_nodes_d;
 452         v3s16 p_nodes_max = cam_pos_nodes + box_nodes_d;
 453
 454         // Take a fair amount as we will be dropping more out later
 455         // Umm... these additions are a bit strange but they are needed.
 456         v3s16 p_blocks_min(
 457                         p_nodes_min.X / MAP_BLOCKSIZE - 3,
 458                         p_nodes_min.Y / MAP_BLOCKSIZE - 3,
 459                         p_nodes_min.Z / MAP_BLOCKSIZE - 3);
 460         v3s16 p_blocks_max(
 461                         p_nodes_max.X / MAP_BLOCKSIZE + 1,
 462                         p_nodes_max.Y / MAP_BLOCKSIZE + 1,
 463                         p_nodes_max.Z / MAP_BLOCKSIZE + 1);
 464
 465         u32 vertex_count = 0;
 466         u32 meshbuffer_count = 0;
 467
 468         // For limiting number of mesh animations per frame
 469         u32 mesh_animate_count = 0;
 470         u32 mesh_animate_count_far = 0;
 471
 472         // Blocks that were drawn and had a mesh
 473         u32 blocks_drawn = 0;
 474         // Blocks which had a corresponding meshbuffer for this pass
 475         u32 blocks_had_pass_meshbuf = 0;
 476         // Blocks from which stuff was actually drawn
 477         u32 blocks_without_stuff = 0;
 478
 479         /*
 480                 Draw the selected MapBlocks
 481         */
 482
 483         {
 484         ScopeProfiler sp(g_profiler, prefix+"drawing blocks", SPT_AVG);
 485
 486         MeshBufListList drawbufs;
 487
 488         for(std::map<v3s16, MapBlock*>::iterator
 489                         i = m_drawlist.begin();
 490                         i != m_drawlist.end(); ++i)
 491         {
 492                 MapBlock *block = i->second;
 493
 494                 // If the mesh of the block happened to get deleted, ignore it
 495                 if(block->mesh == NULL)
 496                         continue;
 497
 498                 float d = 0.0;
 499                 if(isBlockInSight(block->getPos(), camera_position,
 500                                 camera_direction, camera_fov,
 501                                 100000*BS, &d) == false)
 502                 {
 503                         continue;
 504                 }
 505
 506                 // Mesh animation
 507                 {
 508                         //JMutexAutoLock lock(block->mesh_mutex);
 509                         MapBlockMesh *mapBlockMesh = block->mesh;
 510                         assert(mapBlockMesh);
 511                         // Pretty random but this should work somewhat nicely
 512                         bool faraway = d >= BS*50;
 513                         //bool faraway = d >= m_control.wanted_range * BS;
 514                         if(mapBlockMesh->isAnimationForced() ||
 515                                         !faraway ||
 516                                         mesh_animate_count_far < (m_control.range_all ? 200 : 50))
 517                         {
 518                                 bool animated = mapBlockMesh->animate(
 519                                                 faraway,
 520                                                 animation_time,
 521                                                 crack,
 522                                                 daynight_ratio);
 523                                 if(animated)
 524                                         mesh_animate_count++;
 525                                 if(animated && faraway)
 526                                         mesh_animate_count_far++;
 527                         }
 528                         else
 529                         {
 530                                 mapBlockMesh->decreaseAnimationForceTimer();
 531                         }
 532                 }
 533
 534                 /*
 535                         Get the meshbuffers of the block
 536                 */
 537                 {
 538                         //JMutexAutoLock lock(block->mesh_mutex);
 539
 540                         MapBlockMesh *mapBlockMesh = block->mesh;
 541                         assert(mapBlockMesh);
 542
 543                         scene::SMesh *mesh = mapBlockMesh->getMesh();
 544                         assert(mesh);
 545
 546                         u32 c = mesh->getMeshBufferCount();
 547                         for(u32 i=0; i<c; i++)
 548                         {
 549                                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 550
 551                                 buf->getMaterial().setFlag(video::EMF_TRILINEAR_FILTER, m_cache_trilinear_filter);
 552                                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, m_cache_bilinear_filter);
 553                                 buf->getMaterial().setFlag(video::EMF_ANISOTROPIC_FILTER, m_cache_anistropic_filter);
 554
 555                                 const video::SMaterial& material = buf->getMaterial();
 556                                 video::IMaterialRenderer* rnd =
 557                                                 driver->getMaterialRenderer(material.MaterialType);
 558                                 bool transparent = (rnd && rnd->isTransparent());
 559                                 if(transparent == is_transparent_pass)
 560                                 {
 561                                         if(buf->getVertexCount() == 0)
 562                                                 errorstream<<"Block ["<<analyze_block(block)
 563                                                                 <<"] contains an empty meshbuf"<<std::endl;
 564                                         drawbufs.add(buf);
 565                                 }
 566                         }
 567                 }
 568         }
 569
 570         std::vector<MeshBufList> &lists = drawbufs.lists;
 571
 572         int timecheck_counter = 0;
 573         for(std::vector<MeshBufList>::iterator i = lists.begin();
 574                         i != lists.end(); ++i) {
 575                 timecheck_counter++;
 576                 if(timecheck_counter > 50) {
 577                         timecheck_counter = 0;
 578                         int time2 = time(0);
 579                         if(time2 > time1 + 4) {
 580                                 infostream << "ClientMap::renderMap(): "
 581                                         "Rendering takes ages, returning."
 582                                         << std::endl;
 583                                 return;
 584                         }
 585                 }
 586
 587                 MeshBufList &list = *i;
 588
 589                 driver->setMaterial(list.m);
 590
 591                 for(std::vector<scene::IMeshBuffer*>::iterator j = list.bufs.begin();
 592                                 j != list.bufs.end(); ++j) {
 593                         scene::IMeshBuffer *buf = *j;
 594                         driver->drawMeshBuffer(buf);
 595                         vertex_count += buf->getVertexCount();
 596                         meshbuffer_count++;
 597                 }
 598
 599         }
 600         } // ScopeProfiler
 601
 602         // Log only on solid pass because values are the same
 603         if(pass == scene::ESNRP_SOLID){
 604                 g_profiler->avg("CM: animated meshes", mesh_animate_count);
 605                 g_profiler->avg("CM: animated meshes (far)", mesh_animate_count_far);
 606         }
 607
 608         g_profiler->avg(prefix+"vertices drawn", vertex_count);
 609         if(blocks_had_pass_meshbuf != 0)
 610                 g_profiler->avg(prefix+"meshbuffers per block",
 611                                 (float)meshbuffer_count / (float)blocks_had_pass_meshbuf);
 612         if(blocks_drawn != 0)
 613                 g_profiler->avg(prefix+"empty blocks (frac)",
 614                                 (float)blocks_without_stuff / blocks_drawn);
 615
 616         /*infostream<<"renderMap(): is_transparent_pass="<<is_transparent_pass
 617                         <<", rendered "<<vertex_count<<" vertices."<<std::endl;*/
 618 }
 619
 620 static bool getVisibleBrightness(Map *map, v3f p0, v3f dir, float step,
 621                 float step_multiplier, float start_distance, float end_distance,
 622                 INodeDefManager *ndef, u32 daylight_factor, float sunlight_min_d,
 623                 int *result, bool *sunlight_seen)
 624 {
 625         int brightness_sum = 0;
 626         int brightness_count = 0;
 627         float distance = start_distance;
 628         dir.normalize();
 629         v3f pf = p0;
 630         pf += dir * distance;
 631         int noncount = 0;
 632         bool nonlight_seen = false;
 633         bool allow_allowing_non_sunlight_propagates = false;
 634         bool allow_non_sunlight_propagates = false;
 635         // Check content nearly at camera position
 636         {
 637                 v3s16 p = floatToInt(p0 /*+ dir * 3*BS*/, BS);
 638                 MapNode n = map->getNodeNoEx(p);
 639                 if(ndef->get(n).param_type == CPT_LIGHT &&
 640                                 !ndef->get(n).sunlight_propagates)
 641                         allow_allowing_non_sunlight_propagates = true;
 642         }
 643         // If would start at CONTENT_IGNORE, start closer
 644         {
 645                 v3s16 p = floatToInt(pf, BS);
 646                 MapNode n = map->getNodeNoEx(p);
 647                 if(n.getContent() == CONTENT_IGNORE){
 648                         float newd = 2*BS;
 649                         pf = p0 + dir * 2*newd;
 650                         distance = newd;
 651                         sunlight_min_d = 0;
 652                 }
 653         }
 654         for(int i=0; distance < end_distance; i++){
 655                 pf += dir * step;
 656                 distance += step;
 657                 step *= step_multiplier;
 658
 659                 v3s16 p = floatToInt(pf, BS);
 660                 MapNode n = map->getNodeNoEx(p);
 661                 if(allow_allowing_non_sunlight_propagates && i == 0 &&
 662                                 ndef->get(n).param_type == CPT_LIGHT &&
 663                                 !ndef->get(n).sunlight_propagates){
 664                         allow_non_sunlight_propagates = true;
 665                 }
 666                 if(ndef->get(n).param_type != CPT_LIGHT ||
 667                                 (!ndef->get(n).sunlight_propagates &&
 668                                         !allow_non_sunlight_propagates)){
 669                         nonlight_seen = true;
 670                         noncount++;
 671                         if(noncount >= 4)
 672                                 break;
 673                         continue;
 674                 }
 675                 if(distance >= sunlight_min_d && *sunlight_seen == false
 676                                 && nonlight_seen == false)
 677                         if(n.getLight(LIGHTBANK_DAY, ndef) == LIGHT_SUN)
 678                                 *sunlight_seen = true;
 679                 noncount = 0;
 680                 brightness_sum += decode_light(n.getLightBlend(daylight_factor, ndef));
 681                 brightness_count++;
 682         }
 683         *result = 0;
 684         if(brightness_count == 0)
 685                 return false;
 686         *result = brightness_sum / brightness_count;
 687         /*std::cerr<<"Sampled "<<brightness_count<<" points; result="
 688                         <<(*result)<<std::endl;*/
 689         return true;
 690 }
 691
 692 int ClientMap::getBackgroundBrightness(float max_d, u32 daylight_factor,
 693                 int oldvalue, bool *sunlight_seen_result)
 694 {
 695         const bool debugprint = false;
 696         INodeDefManager *ndef = m_gamedef->ndef();
 697         static v3f z_directions[50] = {
 698                 v3f(-100, 0, 0)
 699         };
 700         static f32 z_offsets[sizeof(z_directions)/sizeof(*z_directions)] = {
 701                 -1000,
 702         };
 703         if(z_directions[0].X < -99){
 704                 for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 705                         z_directions[i] = v3f(
 706                                 0.01 * myrand_range(-100, 100),
 707                                 1.0,
 708                                 0.01 * myrand_range(-100, 100)
 709                         );
 710                         z_offsets[i] = 0.01 * myrand_range(0,100);
 711                 }
 712         }
 713         if(debugprint)
 714                 std::cerr<<"In goes "<<PP(m_camera_direction)<<", out comes ";
 715         int sunlight_seen_count = 0;
 716         float sunlight_min_d = max_d*0.8;
 717         if(sunlight_min_d > 35*BS)
 718                 sunlight_min_d = 35*BS;
 719         std::vector<int> values;
 720         for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 721                 v3f z_dir = z_directions[i];
 722                 z_dir.normalize();
 723                 core::CMatrix4<f32> a;
 724                 a.buildRotateFromTo(v3f(0,1,0), z_dir);
 725                 v3f dir = m_camera_direction;
 726                 a.rotateVect(dir);
 727                 int br = 0;
 728                 float step = BS*1.5;
 729                 if(max_d > 35*BS)
 730                         step = max_d / 35 * 1.5;
 731                 float off = step * z_offsets[i];
 732                 bool sunlight_seen_now = false;
 733                 bool ok = getVisibleBrightness(this, m_camera_position, dir,
 734                                 step, 1.0, max_d*0.6+off, max_d, ndef, daylight_factor,
 735                                 sunlight_min_d,
 736                                 &br, &sunlight_seen_now);
 737                 if(sunlight_seen_now)
 738                         sunlight_seen_count++;
 739                 if(!ok)
 740                         continue;
 741                 values.push_back(br);
 742                 // Don't try too much if being in the sun is clear
 743                 if(sunlight_seen_count >= 20)
 744                         break;
 745         }
 746         int brightness_sum = 0;
 747         int brightness_count = 0;
 748         std::sort(values.begin(), values.end());
 749         u32 num_values_to_use = values.size();
 750         if(num_values_to_use >= 10)
 751                 num_values_to_use -= num_values_to_use/2;
 752         else if(num_values_to_use >= 7)
 753                 num_values_to_use -= num_values_to_use/3;
 754         u32 first_value_i = (values.size() - num_values_to_use) / 2;
 755         if(debugprint){
 756                 for(u32 i=0; i < first_value_i; i++)
 757                         std::cerr<<values[i]<<" ";
 758                 std::cerr<<"[";
 759         }
 760         for(u32 i=first_value_i; i < first_value_i+num_values_to_use; i++){
 761                 if(debugprint)
 762                         std::cerr<<values[i]<<" ";
 763                 brightness_sum += values[i];
 764                 brightness_count++;
 765         }
 766         if(debugprint){
 767                 std::cerr<<"]";
 768                 for(u32 i=first_value_i+num_values_to_use; i < values.size(); i++)
 769                         std::cerr<<values[i]<<" ";
 770         }
 771         int ret = 0;
 772         if(brightness_count == 0){
 773                 MapNode n = getNodeNoEx(floatToInt(m_camera_position, BS));
 774                 if(ndef->get(n).param_type == CPT_LIGHT){
 775                         ret = decode_light(n.getLightBlend(daylight_factor, ndef));
 776                 } else {
 777                         ret = oldvalue;
 778                 }
 779         } else {
 780                 /*float pre = (float)brightness_sum / (float)brightness_count;
 781                 float tmp = pre;
 782                 const float d = 0.2;
 783                 pre *= 1.0 + d*2;
 784                 pre -= tmp * d;
 785                 int preint = pre;
 786                 ret = MYMAX(0, MYMIN(255, preint));*/
 787                 ret = brightness_sum / brightness_count;
 788         }
 789         if(debugprint)
 790                 std::cerr<<"Result: "<<ret<<" sunlight_seen_count="
 791                                 <<sunlight_seen_count<<std::endl;
 792         *sunlight_seen_result = (sunlight_seen_count > 0);
 793         return ret;
 794 }
 795
 796 void ClientMap::renderPostFx(CameraMode cam_mode)
 797 {
 798         INodeDefManager *nodemgr = m_gamedef->ndef();
 799
 800         // Sadly ISceneManager has no "post effects" render pass, in that case we
 801         // could just register for that and handle it in renderMap().
 802
 803         m_camera_mutex.Lock();
 804         v3f camera_position = m_camera_position;
 805         m_camera_mutex.Unlock();
 806
 807         MapNode n = getNodeNoEx(floatToInt(camera_position, BS));
 808
 809         // - If the player is in a solid node, make everything black.
 810         // - If the player is in liquid, draw a semi-transparent overlay.
 811         // - Do not if player is in third person mode
 812         const ContentFeatures& features = nodemgr->get(n);
 813         video::SColor post_effect_color = features.post_effect_color;
 814         if(features.solidness == 2 && !(g_settings->getBool("noclip") &&
 815                         m_gamedef->checkLocalPrivilege("noclip")) &&
 816                         cam_mode == CAMERA_MODE_FIRST)
 817         {
 818                 post_effect_color = video::SColor(255, 0, 0, 0);
 819         }
 820         if (post_effect_color.getAlpha() != 0)
 821         {
 822                 // Draw a full-screen rectangle
 823                 video::IVideoDriver* driver = SceneManager->getVideoDriver();
 824                 v2u32 ss = driver->getScreenSize();
 825                 core::rect<s32> rect(0,0, ss.X, ss.Y);
 826                 driver->draw2DRectangle(post_effect_color, rect);
 827         }
 828 }
 829
 830 void ClientMap::PrintInfo(std::ostream &out)
 831 {
 832         out<<"ClientMap: ";
 833 }
 834
 835