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 "util/basic_macros.h"
  34 #include <algorithm>
  35
  36 ClientMap::ClientMap(
  37                 Client *client,
  38                 IGameDef *gamedef,
  39                 MapDrawControl &control,
  40                 scene::ISceneNode* parent,
  41                 scene::ISceneManager* mgr,
  42                 s32 id
  43 ):
  44         Map(dout_client, gamedef),
  45         scene::ISceneNode(parent, mgr, id),
  46         m_client(client),
  47         m_control(control),
  48         m_camera_position(0,0,0),
  49         m_camera_direction(0,0,1),
  50         m_camera_fov(M_PI)
  51 {
  52         m_box = aabb3f(-BS*1000000,-BS*1000000,-BS*1000000,
  53                         BS*1000000,BS*1000000,BS*1000000);
  54
  55         /* TODO: Add a callback function so these can be updated when a setting
  56          *       changes.  At this point in time it doesn't matter (e.g. /set
  57          *       is documented to change server settings only)
  58          *
  59          * TODO: Local caching of settings is not optimal and should at some stage
  60          *       be updated to use a global settings object for getting thse values
  61          *       (as opposed to the this local caching). This can be addressed in
  62          *       a later release.
  63          */
  64         m_cache_trilinear_filter  = g_settings->getBool("trilinear_filter");
  65         m_cache_bilinear_filter   = g_settings->getBool("bilinear_filter");
  66         m_cache_anistropic_filter = g_settings->getBool("anisotropic_filter");
  67
  68 }
  69
  70 ClientMap::~ClientMap()
  71 {
  72         /*MutexAutoLock lock(mesh_mutex);
  73
  74         if(mesh != NULL)
  75         {
  76                 mesh->drop();
  77                 mesh = NULL;
  78         }*/
  79 }
  80
  81 MapSector * ClientMap::emergeSector(v2s16 p2d)
  82 {
  83         DSTACK(FUNCTION_NAME);
  84         // Check that it doesn't exist already
  85         try{
  86                 return getSectorNoGenerate(p2d);
  87         }
  88         catch(InvalidPositionException &e)
  89         {
  90         }
  91
  92         // Create a sector
  93         ClientMapSector *sector = new ClientMapSector(this, p2d, m_gamedef);
  94
  95         {
  96                 //MutexAutoLock lock(m_sector_mutex); // Bulk comment-out
  97                 m_sectors[p2d] = sector;
  98         }
  99
 100         return sector;
 101 }
 102
 103 void ClientMap::OnRegisterSceneNode()
 104 {
 105         if(IsVisible)
 106         {
 107                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
 108                 SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
 109         }
 110
 111         ISceneNode::OnRegisterSceneNode();
 112 }
 113
 114 static bool isOccluded(Map *map, v3s16 p0, v3s16 p1, float step, float stepfac,
 115                 float start_off, float end_off, u32 needed_count, INodeDefManager *nodemgr)
 116 {
 117         float d0 = (float)BS * p0.getDistanceFrom(p1);
 118         v3s16 u0 = p1 - p0;
 119         v3f uf = v3f(u0.X, u0.Y, u0.Z) * BS;
 120         uf.normalize();
 121         v3f p0f = v3f(p0.X, p0.Y, p0.Z) * BS;
 122         u32 count = 0;
 123         for(float s=start_off; s<d0+end_off; s+=step){
 124                 v3f pf = p0f + uf * s;
 125                 v3s16 p = floatToInt(pf, BS);
 126                 MapNode n = map->getNodeNoEx(p);
 127                 bool is_transparent = false;
 128                 const ContentFeatures &f = nodemgr->get(n);
 129                 if(f.solidness == 0)
 130                         is_transparent = (f.visual_solidness != 2);
 131                 else
 132                         is_transparent = (f.solidness != 2);
 133                 if(!is_transparent){
 134                         count++;
 135                         if(count >= needed_count)
 136                                 return true;
 137                 }
 138                 step *= stepfac;
 139         }
 140         return false;
 141 }
 142
 143 void ClientMap::getBlocksInViewRange(v3s16 cam_pos_nodes,
 144                 v3s16 *p_blocks_min, v3s16 *p_blocks_max)
 145 {
 146         v3s16 box_nodes_d = m_control.wanted_range * v3s16(1, 1, 1);
 147         // Define p_nodes_min/max as v3s32 because 'cam_pos_nodes -/+ box_nodes_d'
 148         // can exceed the range of v3s16 when a large view range is used near the
 149         // world edges.
 150         v3s32 p_nodes_min(
 151                 cam_pos_nodes.X - box_nodes_d.X,
 152                 cam_pos_nodes.Y - box_nodes_d.Y,
 153                 cam_pos_nodes.Z - box_nodes_d.Z);
 154         v3s32 p_nodes_max(
 155                 cam_pos_nodes.X + box_nodes_d.X,
 156                 cam_pos_nodes.Y + box_nodes_d.Y,
 157                 cam_pos_nodes.Z + box_nodes_d.Z);
 158         // Take a fair amount as we will be dropping more out later
 159         // Umm... these additions are a bit strange but they are needed.
 160         *p_blocks_min = v3s16(
 161                         p_nodes_min.X / MAP_BLOCKSIZE - 3,
 162                         p_nodes_min.Y / MAP_BLOCKSIZE - 3,
 163                         p_nodes_min.Z / MAP_BLOCKSIZE - 3);
 164         *p_blocks_max = v3s16(
 165                         p_nodes_max.X / MAP_BLOCKSIZE + 1,
 166                         p_nodes_max.Y / MAP_BLOCKSIZE + 1,
 167                         p_nodes_max.Z / MAP_BLOCKSIZE + 1);
 168 }
 169
 170 void ClientMap::updateDrawList(video::IVideoDriver* driver)
 171 {
 172         ScopeProfiler sp(g_profiler, "CM::updateDrawList()", SPT_AVG);
 173         g_profiler->add("CM::updateDrawList() count", 1);
 174
 175         INodeDefManager *nodemgr = m_gamedef->ndef();
 176
 177         for (std::map<v3s16, MapBlock*>::iterator i = m_drawlist.begin();
 178                         i != m_drawlist.end(); ++i) {
 179                 MapBlock *block = i->second;
 180                 block->refDrop();
 181         }
 182         m_drawlist.clear();
 183
 184         v3f camera_position = m_camera_position;
 185         v3f camera_direction = m_camera_direction;
 186         f32 camera_fov = m_camera_fov;
 187
 188         // Use a higher fov to accomodate faster camera movements.
 189         // Blocks are cropped better when they are drawn.
 190         // Or maybe they aren't? Well whatever.
 191         camera_fov *= 1.2;
 192
 193         v3s16 cam_pos_nodes = floatToInt(camera_position, BS);
 194         v3s16 p_blocks_min;
 195         v3s16 p_blocks_max;
 196         getBlocksInViewRange(cam_pos_nodes, &p_blocks_min, &p_blocks_max);
 197
 198         // Number of blocks in rendering range
 199         u32 blocks_in_range = 0;
 200         // Number of blocks occlusion culled
 201         u32 blocks_occlusion_culled = 0;
 202         // Number of blocks in rendering range but don't have a mesh
 203         u32 blocks_in_range_without_mesh = 0;
 204         // Blocks that had mesh that would have been drawn according to
 205         // rendering range (if max blocks limit didn't kick in)
 206         u32 blocks_would_have_drawn = 0;
 207         // Blocks that were drawn and had a mesh
 208         u32 blocks_drawn = 0;
 209         // Blocks which had a corresponding meshbuffer for this pass
 210         //u32 blocks_had_pass_meshbuf = 0;
 211         // Blocks from which stuff was actually drawn
 212         //u32 blocks_without_stuff = 0;
 213         // Distance to farthest drawn block
 214         float farthest_drawn = 0;
 215
 216         for (std::map<v2s16, MapSector*>::iterator si = m_sectors.begin();
 217                         si != m_sectors.end(); ++si) {
 218                 MapSector *sector = si->second;
 219                 v2s16 sp = sector->getPos();
 220
 221                 if (m_control.range_all == false) {
 222                         if (sp.X < p_blocks_min.X || sp.X > p_blocks_max.X ||
 223                                         sp.Y < p_blocks_min.Z || sp.Y > p_blocks_max.Z)
 224                                 continue;
 225                 }
 226
 227                 MapBlockVect sectorblocks;
 228                 sector->getBlocks(sectorblocks);
 229
 230                 /*
 231                         Loop through blocks in sector
 232                 */
 233
 234                 u32 sector_blocks_drawn = 0;
 235
 236                 for (MapBlockVect::iterator i = sectorblocks.begin();
 237                                 i != sectorblocks.end(); ++i) {
 238                         MapBlock *block = *i;
 239
 240                         /*
 241                                 Compare block position to camera position, skip
 242                                 if not seen on display
 243                         */
 244
 245                         if (block->mesh != NULL)
 246                                 block->mesh->updateCameraOffset(m_camera_offset);
 247
 248                         float range = 100000 * BS;
 249                         if (m_control.range_all == false)
 250                                 range = m_control.wanted_range * BS;
 251
 252                         float d = 0.0;
 253                         if (!isBlockInSight(block->getPos(), camera_position,
 254                                         camera_direction, camera_fov, range, &d))
 255                                 continue;
 256
 257                         // This is ugly (spherical distance limit?)
 258                         /*if(m_control.range_all == false &&
 259                                         d - 0.5*BS*MAP_BLOCKSIZE > range)
 260                                 continue;*/
 261
 262                         blocks_in_range++;
 263
 264                         /*
 265                                 Ignore if mesh doesn't exist
 266                         */
 267                         {
 268                                 //MutexAutoLock lock(block->mesh_mutex);
 269
 270                                 if (block->mesh == NULL) {
 271                                         blocks_in_range_without_mesh++;
 272                                         continue;
 273                                 }
 274                         }
 275
 276                         /*
 277                                 Occlusion culling
 278                         */
 279
 280                         // No occlusion culling when free_move is on and camera is
 281                         // inside ground
 282                         bool occlusion_culling_enabled = true;
 283                         if (g_settings->getBool("free_move")) {
 284                                 MapNode n = getNodeNoEx(cam_pos_nodes);
 285                                 if (n.getContent() == CONTENT_IGNORE ||
 286                                                 nodemgr->get(n).solidness == 2)
 287                                         occlusion_culling_enabled = false;
 288                         }
 289
 290                         v3s16 cpn = block->getPos() * MAP_BLOCKSIZE;
 291                         cpn += v3s16(MAP_BLOCKSIZE / 2, MAP_BLOCKSIZE / 2, MAP_BLOCKSIZE / 2);
 292                         float step = BS * 1;
 293                         float stepfac = 1.1;
 294                         float startoff = BS * 1;
 295                         // The occlusion search of 'isOccluded()' must stop short of the target
 296                         // point by distance 'endoff' (end offset) to not enter the target mapblock.
 297                         // For the 8 mapblock corners 'endoff' must therefore be the maximum diagonal
 298                         // of a mapblock, because we must consider all view angles.
 299                         // sqrt(1^2 + 1^2 + 1^2) = 1.732
 300                         float endoff = -BS * MAP_BLOCKSIZE * 1.732050807569;
 301                         v3s16 spn = cam_pos_nodes;
 302                         s16 bs2 = MAP_BLOCKSIZE / 2 + 1;
 303                         // to reduce the likelihood of falsely occluded blocks
 304                         // require at least two solid blocks
 305                         // this is a HACK, we should think of a more precise algorithm
 306                         u32 needed_count = 2;
 307                         if (occlusion_culling_enabled &&
 308                                         // For the central point of the mapblock 'endoff' can be halved
 309                                         isOccluded(this, spn, cpn,
 310                                                 step, stepfac, startoff, endoff / 2.0f, 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                                         isOccluded(this, spn, cpn + v3s16(bs2,-bs2,-bs2),
 318                                                 step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 319                                         isOccluded(this, spn, cpn + v3s16(-bs2,bs2,bs2),
 320                                                 step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 321                                         isOccluded(this, spn, cpn + v3s16(-bs2,bs2,-bs2),
 322                                                 step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 323                                         isOccluded(this, spn, cpn + v3s16(-bs2,-bs2,bs2),
 324                                                 step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 325                                         isOccluded(this, spn, cpn + v3s16(-bs2,-bs2,-bs2),
 326                                                 step, stepfac, startoff, endoff, needed_count, nodemgr)) {
 327                                 blocks_occlusion_culled++;
 328                                 continue;
 329                         }
 330
 331                         // This block is in range. Reset usage timer.
 332                         block->resetUsageTimer();
 333
 334                         // Limit block count in case of a sudden increase
 335                         blocks_would_have_drawn++;
 336                         if (blocks_drawn >= m_control.wanted_max_blocks &&
 337                                         !m_control.range_all &&
 338                                         d > m_control.wanted_range * BS)
 339                                 continue;
 340
 341                         // Add to set
 342                         block->refGrab();
 343                         m_drawlist[block->getPos()] = block;
 344
 345                         sector_blocks_drawn++;
 346                         blocks_drawn++;
 347                         if (d / BS > farthest_drawn)
 348                                 farthest_drawn = d / BS;
 349
 350                 } // foreach sectorblocks
 351
 352                 if (sector_blocks_drawn != 0)
 353                         m_last_drawn_sectors.insert(sp);
 354         }
 355
 356         m_control.blocks_would_have_drawn = blocks_would_have_drawn;
 357         m_control.blocks_drawn = blocks_drawn;
 358         m_control.farthest_drawn = farthest_drawn;
 359
 360         g_profiler->avg("CM: blocks in range", blocks_in_range);
 361         g_profiler->avg("CM: blocks occlusion culled", blocks_occlusion_culled);
 362         if (blocks_in_range != 0)
 363                 g_profiler->avg("CM: blocks in range without mesh (frac)",
 364                                 (float)blocks_in_range_without_mesh / blocks_in_range);
 365         g_profiler->avg("CM: blocks drawn", blocks_drawn);
 366         g_profiler->avg("CM: farthest drawn", farthest_drawn);
 367         g_profiler->avg("CM: wanted max blocks", m_control.wanted_max_blocks);
 368 }
 369
 370 struct MeshBufList
 371 {
 372         video::SMaterial m;
 373         std::vector<scene::IMeshBuffer*> bufs;
 374 };
 375
 376 struct MeshBufListList
 377 {
 378         std::vector<MeshBufList> lists;
 379
 380         void clear()
 381         {
 382                 lists.clear();
 383         }
 384
 385         void add(scene::IMeshBuffer *buf)
 386         {
 387                 for(std::vector<MeshBufList>::iterator i = lists.begin();
 388                                 i != lists.end(); ++i){
 389                         MeshBufList &l = *i;
 390                         video::SMaterial &m = buf->getMaterial();
 391
 392                         // comparing a full material is quite expensive so we don't do it if
 393                         // not even first texture is equal
 394                         if (l.m.TextureLayer[0].Texture != m.TextureLayer[0].Texture)
 395                                 continue;
 396
 397                         if (l.m == m) {
 398                                 l.bufs.push_back(buf);
 399                                 return;
 400                         }
 401                 }
 402                 MeshBufList l;
 403                 l.m = buf->getMaterial();
 404                 l.bufs.push_back(buf);
 405                 lists.push_back(l);
 406         }
 407 };
 408
 409 void ClientMap::renderMap(video::IVideoDriver* driver, s32 pass)
 410 {
 411         DSTACK(FUNCTION_NAME);
 412
 413         bool is_transparent_pass = pass == scene::ESNRP_TRANSPARENT;
 414
 415         std::string prefix;
 416         if (pass == scene::ESNRP_SOLID)
 417                 prefix = "CM: solid: ";
 418         else
 419                 prefix = "CM: transparent: ";
 420
 421         /*
 422                 This is called two times per frame, reset on the non-transparent one
 423         */
 424         if (pass == scene::ESNRP_SOLID)
 425                 m_last_drawn_sectors.clear();
 426
 427         /*
 428                 Get time for measuring timeout.
 429
 430                 Measuring time is very useful for long delays when the
 431                 machine is swapping a lot.
 432         */
 433         int time1 = time(0);
 434
 435         /*
 436                 Get animation parameters
 437         */
 438         float animation_time = m_client->getAnimationTime();
 439         int crack = m_client->getCrackLevel();
 440         u32 daynight_ratio = m_client->getEnv().getDayNightRatio();
 441
 442         v3f camera_position = m_camera_position;
 443         v3f camera_direction = m_camera_direction;
 444         f32 camera_fov = m_camera_fov;
 445
 446         /*
 447                 Get all blocks and draw all visible ones
 448         */
 449
 450         v3s16 cam_pos_nodes = floatToInt(camera_position, BS);
 451         v3s16 p_blocks_min;
 452         v3s16 p_blocks_max;
 453         getBlocksInViewRange(cam_pos_nodes, &p_blocks_min, &p_blocks_max);
 454
 455         u32 vertex_count = 0;
 456         u32 meshbuffer_count = 0;
 457
 458         // For limiting number of mesh animations per frame
 459         u32 mesh_animate_count = 0;
 460         u32 mesh_animate_count_far = 0;
 461
 462         // Blocks that were drawn and had a mesh
 463         u32 blocks_drawn = 0;
 464         // Blocks which had a corresponding meshbuffer for this pass
 465         u32 blocks_had_pass_meshbuf = 0;
 466         // Blocks from which stuff was actually drawn
 467         u32 blocks_without_stuff = 0;
 468
 469         /*
 470                 Draw the selected MapBlocks
 471         */
 472
 473         {
 474         ScopeProfiler sp(g_profiler, prefix + "drawing blocks", SPT_AVG);
 475
 476         MeshBufListList drawbufs;
 477
 478         for (std::map<v3s16, MapBlock*>::iterator i = m_drawlist.begin();
 479                         i != m_drawlist.end(); ++i) {
 480                 MapBlock *block = i->second;
 481
 482                 // If the mesh of the block happened to get deleted, ignore it
 483                 if (block->mesh == NULL)
 484                         continue;
 485
 486                 float d = 0.0;
 487                 if (!isBlockInSight(block->getPos(), camera_position,
 488                                 camera_direction, camera_fov, 100000 * BS, &d))
 489                         continue;
 490
 491                 // Mesh animation
 492                 {
 493                         //MutexAutoLock lock(block->mesh_mutex);
 494                         MapBlockMesh *mapBlockMesh = block->mesh;
 495                         assert(mapBlockMesh);
 496                         // Pretty random but this should work somewhat nicely
 497                         bool faraway = d >= BS * 50;
 498                         //bool faraway = d >= m_control.wanted_range * BS;
 499                         if (mapBlockMesh->isAnimationForced() || !faraway ||
 500                                         mesh_animate_count_far < (m_control.range_all ? 200 : 50)) {
 501                                 bool animated = mapBlockMesh->animate(faraway, animation_time,
 502                                         crack, daynight_ratio);
 503                                 if (animated)
 504                                         mesh_animate_count++;
 505                                 if (animated && faraway)
 506                                         mesh_animate_count_far++;
 507                         } else {
 508                                 mapBlockMesh->decreaseAnimationForceTimer();
 509                         }
 510                 }
 511
 512                 /*
 513                         Get the meshbuffers of the block
 514                 */
 515                 {
 516                         //MutexAutoLock lock(block->mesh_mutex);
 517
 518                         MapBlockMesh *mapBlockMesh = block->mesh;
 519                         assert(mapBlockMesh);
 520
 521                         scene::IMesh *mesh = mapBlockMesh->getMesh();
 522                         assert(mesh);
 523
 524                         u32 c = mesh->getMeshBufferCount();
 525                         for (u32 i = 0; i < c; i++)
 526                         {
 527                                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 528
 529                                 buf->getMaterial().setFlag(video::EMF_TRILINEAR_FILTER, m_cache_trilinear_filter);
 530                                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, m_cache_bilinear_filter);
 531                                 buf->getMaterial().setFlag(video::EMF_ANISOTROPIC_FILTER, m_cache_anistropic_filter);
 532                                 buf->getMaterial().setFlag(video::EMF_WIREFRAME, m_control.show_wireframe);
 533
 534                                 const video::SMaterial& material = buf->getMaterial();
 535                                 video::IMaterialRenderer* rnd =
 536                                                 driver->getMaterialRenderer(material.MaterialType);
 537                                 bool transparent = (rnd && rnd->isTransparent());
 538                                 if (transparent == is_transparent_pass) {
 539                                         if (buf->getVertexCount() == 0)
 540                                                 errorstream << "Block [" << analyze_block(block)
 541                                                          << "] contains an empty meshbuf" << std::endl;
 542                                         drawbufs.add(buf);
 543                                 }
 544                         }
 545                 }
 546         }
 547
 548         std::vector<MeshBufList> &lists = drawbufs.lists;
 549
 550         int timecheck_counter = 0;
 551         for (std::vector<MeshBufList>::iterator i = lists.begin();
 552                         i != lists.end(); ++i) {
 553                 timecheck_counter++;
 554                 if (timecheck_counter > 50) {
 555                         timecheck_counter = 0;
 556                         int time2 = time(0);
 557                         if (time2 > time1 + 4) {
 558                                 infostream << "ClientMap::renderMap(): "
 559                                         "Rendering takes ages, returning."
 560                                         << std::endl;
 561                                 return;
 562                         }
 563                 }
 564
 565                 MeshBufList &list = *i;
 566
 567                 driver->setMaterial(list.m);
 568
 569                 for (std::vector<scene::IMeshBuffer*>::iterator j = list.bufs.begin();
 570                                 j != list.bufs.end(); ++j) {
 571                         scene::IMeshBuffer *buf = *j;
 572                         driver->drawMeshBuffer(buf);
 573                         vertex_count += buf->getVertexCount();
 574                         meshbuffer_count++;
 575                 }
 576
 577         }
 578         } // ScopeProfiler
 579
 580         // Log only on solid pass because values are the same
 581         if (pass == scene::ESNRP_SOLID) {
 582                 g_profiler->avg("CM: animated meshes", mesh_animate_count);
 583                 g_profiler->avg("CM: animated meshes (far)", mesh_animate_count_far);
 584         }
 585
 586         g_profiler->avg(prefix + "vertices drawn", vertex_count);
 587         if (blocks_had_pass_meshbuf != 0)
 588                 g_profiler->avg(prefix + "meshbuffers per block",
 589                         (float)meshbuffer_count / (float)blocks_had_pass_meshbuf);
 590         if (blocks_drawn != 0)
 591                 g_profiler->avg(prefix + "empty blocks (frac)",
 592                         (float)blocks_without_stuff / blocks_drawn);
 593
 594         /*infostream<<"renderMap(): is_transparent_pass="<<is_transparent_pass
 595                         <<", rendered "<<vertex_count<<" vertices."<<std::endl;*/
 596 }
 597
 598 static bool getVisibleBrightness(Map *map, v3f p0, v3f dir, float step,
 599                 float step_multiplier, float start_distance, float end_distance,
 600                 INodeDefManager *ndef, u32 daylight_factor, float sunlight_min_d,
 601                 int *result, bool *sunlight_seen)
 602 {
 603         int brightness_sum = 0;
 604         int brightness_count = 0;
 605         float distance = start_distance;
 606         dir.normalize();
 607         v3f pf = p0;
 608         pf += dir * distance;
 609         int noncount = 0;
 610         bool nonlight_seen = false;
 611         bool allow_allowing_non_sunlight_propagates = false;
 612         bool allow_non_sunlight_propagates = false;
 613         // Check content nearly at camera position
 614         {
 615                 v3s16 p = floatToInt(p0 /*+ dir * 3*BS*/, BS);
 616                 MapNode n = map->getNodeNoEx(p);
 617                 if(ndef->get(n).param_type == CPT_LIGHT &&
 618                                 !ndef->get(n).sunlight_propagates)
 619                         allow_allowing_non_sunlight_propagates = true;
 620         }
 621         // If would start at CONTENT_IGNORE, start closer
 622         {
 623                 v3s16 p = floatToInt(pf, BS);
 624                 MapNode n = map->getNodeNoEx(p);
 625                 if(n.getContent() == CONTENT_IGNORE){
 626                         float newd = 2*BS;
 627                         pf = p0 + dir * 2*newd;
 628                         distance = newd;
 629                         sunlight_min_d = 0;
 630                 }
 631         }
 632         for(int i=0; distance < end_distance; i++){
 633                 pf += dir * step;
 634                 distance += step;
 635                 step *= step_multiplier;
 636
 637                 v3s16 p = floatToInt(pf, BS);
 638                 MapNode n = map->getNodeNoEx(p);
 639                 if(allow_allowing_non_sunlight_propagates && i == 0 &&
 640                                 ndef->get(n).param_type == CPT_LIGHT &&
 641                                 !ndef->get(n).sunlight_propagates){
 642                         allow_non_sunlight_propagates = true;
 643                 }
 644                 if(ndef->get(n).param_type != CPT_LIGHT ||
 645                                 (!ndef->get(n).sunlight_propagates &&
 646                                         !allow_non_sunlight_propagates)){
 647                         nonlight_seen = true;
 648                         noncount++;
 649                         if(noncount >= 4)
 650                                 break;
 651                         continue;
 652                 }
 653                 if(distance >= sunlight_min_d && *sunlight_seen == false
 654                                 && nonlight_seen == false)
 655                         if(n.getLight(LIGHTBANK_DAY, ndef) == LIGHT_SUN)
 656                                 *sunlight_seen = true;
 657                 noncount = 0;
 658                 brightness_sum += decode_light(n.getLightBlend(daylight_factor, ndef));
 659                 brightness_count++;
 660         }
 661         *result = 0;
 662         if(brightness_count == 0)
 663                 return false;
 664         *result = brightness_sum / brightness_count;
 665         /*std::cerr<<"Sampled "<<brightness_count<<" points; result="
 666                         <<(*result)<<std::endl;*/
 667         return true;
 668 }
 669
 670 int ClientMap::getBackgroundBrightness(float max_d, u32 daylight_factor,
 671                 int oldvalue, bool *sunlight_seen_result)
 672 {
 673         const bool debugprint = false;
 674         INodeDefManager *ndef = m_gamedef->ndef();
 675         static v3f z_directions[50] = {
 676                 v3f(-100, 0, 0)
 677         };
 678         static f32 z_offsets[sizeof(z_directions)/sizeof(*z_directions)] = {
 679                 -1000,
 680         };
 681         if(z_directions[0].X < -99){
 682                 for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 683                         z_directions[i] = v3f(
 684                                 0.01 * myrand_range(-100, 100),
 685                                 1.0,
 686                                 0.01 * myrand_range(-100, 100)
 687                         );
 688                         z_offsets[i] = 0.01 * myrand_range(0,100);
 689                 }
 690         }
 691         if(debugprint)
 692                 std::cerr<<"In goes "<<PP(m_camera_direction)<<", out comes ";
 693         int sunlight_seen_count = 0;
 694         float sunlight_min_d = max_d*0.8;
 695         if(sunlight_min_d > 35*BS)
 696                 sunlight_min_d = 35*BS;
 697         std::vector<int> values;
 698         for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 699                 v3f z_dir = z_directions[i];
 700                 z_dir.normalize();
 701                 core::CMatrix4<f32> a;
 702                 a.buildRotateFromTo(v3f(0,1,0), z_dir);
 703                 v3f dir = m_camera_direction;
 704                 a.rotateVect(dir);
 705                 int br = 0;
 706                 float step = BS*1.5;
 707                 if(max_d > 35*BS)
 708                         step = max_d / 35 * 1.5;
 709                 float off = step * z_offsets[i];
 710                 bool sunlight_seen_now = false;
 711                 bool ok = getVisibleBrightness(this, m_camera_position, dir,
 712                                 step, 1.0, max_d*0.6+off, max_d, ndef, daylight_factor,
 713                                 sunlight_min_d,
 714                                 &br, &sunlight_seen_now);
 715                 if(sunlight_seen_now)
 716                         sunlight_seen_count++;
 717                 if(!ok)
 718                         continue;
 719                 values.push_back(br);
 720                 // Don't try too much if being in the sun is clear
 721                 if(sunlight_seen_count >= 20)
 722                         break;
 723         }
 724         int brightness_sum = 0;
 725         int brightness_count = 0;
 726         std::sort(values.begin(), values.end());
 727         u32 num_values_to_use = values.size();
 728         if(num_values_to_use >= 10)
 729                 num_values_to_use -= num_values_to_use/2;
 730         else if(num_values_to_use >= 7)
 731                 num_values_to_use -= num_values_to_use/3;
 732         u32 first_value_i = (values.size() - num_values_to_use) / 2;
 733         if(debugprint){
 734                 for(u32 i=0; i < first_value_i; i++)
 735                         std::cerr<<values[i]<<" ";
 736                 std::cerr<<"[";
 737         }
 738         for(u32 i=first_value_i; i < first_value_i+num_values_to_use; i++){
 739                 if(debugprint)
 740                         std::cerr<<values[i]<<" ";
 741                 brightness_sum += values[i];
 742                 brightness_count++;
 743         }
 744         if(debugprint){
 745                 std::cerr<<"]";
 746                 for(u32 i=first_value_i+num_values_to_use; i < values.size(); i++)
 747                         std::cerr<<values[i]<<" ";
 748         }
 749         int ret = 0;
 750         if(brightness_count == 0){
 751                 MapNode n = getNodeNoEx(floatToInt(m_camera_position, BS));
 752                 if(ndef->get(n).param_type == CPT_LIGHT){
 753                         ret = decode_light(n.getLightBlend(daylight_factor, ndef));
 754                 } else {
 755                         ret = oldvalue;
 756                 }
 757         } else {
 758                 /*float pre = (float)brightness_sum / (float)brightness_count;
 759                 float tmp = pre;
 760                 const float d = 0.2;
 761                 pre *= 1.0 + d*2;
 762                 pre -= tmp * d;
 763                 int preint = pre;
 764                 ret = MYMAX(0, MYMIN(255, preint));*/
 765                 ret = brightness_sum / brightness_count;
 766         }
 767         if(debugprint)
 768                 std::cerr<<"Result: "<<ret<<" sunlight_seen_count="
 769                                 <<sunlight_seen_count<<std::endl;
 770         *sunlight_seen_result = (sunlight_seen_count > 0);
 771         return ret;
 772 }
 773
 774 void ClientMap::renderPostFx(CameraMode cam_mode)
 775 {
 776         INodeDefManager *nodemgr = m_gamedef->ndef();
 777
 778         // Sadly ISceneManager has no "post effects" render pass, in that case we
 779         // could just register for that and handle it in renderMap().
 780
 781         MapNode n = getNodeNoEx(floatToInt(m_camera_position, BS));
 782
 783         // - If the player is in a solid node, make everything black.
 784         // - If the player is in liquid, draw a semi-transparent overlay.
 785         // - Do not if player is in third person mode
 786         const ContentFeatures& features = nodemgr->get(n);
 787         video::SColor post_effect_color = features.post_effect_color;
 788         if(features.solidness == 2 && !(g_settings->getBool("noclip") &&
 789                         m_gamedef->checkLocalPrivilege("noclip")) &&
 790                         cam_mode == CAMERA_MODE_FIRST)
 791         {
 792                 post_effect_color = video::SColor(255, 0, 0, 0);
 793         }
 794         if (post_effect_color.getAlpha() != 0)
 795         {
 796                 // Draw a full-screen rectangle
 797                 video::IVideoDriver* driver = SceneManager->getVideoDriver();
 798                 v2u32 ss = driver->getScreenSize();
 799                 core::rect<s32> rect(0,0, ss.X, ss.Y);
 800                 driver->draw2DRectangle(post_effect_color, rect);
 801         }
 802 }
 803
 804 void ClientMap::PrintInfo(std::ostream &out)
 805 {
 806         out<<"ClientMap: ";
 807 }
 808
 809