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 = aabb3f(-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::getBlocksInViewRange(v3s16 cam_pos_nodes,
 145                 v3s16 *p_blocks_min, v3s16 *p_blocks_max)
 146 {
 147         v3s16 box_nodes_d = m_control.wanted_range * v3s16(1, 1, 1);
 148         // Define p_nodes_min/max as v3s32 because 'cam_pos_nodes -/+ box_nodes_d'
 149         // can exceed the range of v3s16 when a large view range is used near the
 150         // world edges.
 151         v3s32 p_nodes_min(
 152                 cam_pos_nodes.X - box_nodes_d.X,
 153                 cam_pos_nodes.Y - box_nodes_d.Y,
 154                 cam_pos_nodes.Z - box_nodes_d.Z);
 155         v3s32 p_nodes_max(
 156                 cam_pos_nodes.X + box_nodes_d.X,
 157                 cam_pos_nodes.Y + box_nodes_d.Y,
 158                 cam_pos_nodes.Z + box_nodes_d.Z);
 159         // Take a fair amount as we will be dropping more out later
 160         // Umm... these additions are a bit strange but they are needed.
 161         *p_blocks_min = v3s16(
 162                         p_nodes_min.X / MAP_BLOCKSIZE - 3,
 163                         p_nodes_min.Y / MAP_BLOCKSIZE - 3,
 164                         p_nodes_min.Z / MAP_BLOCKSIZE - 3);
 165         *p_blocks_max = v3s16(
 166                         p_nodes_max.X / MAP_BLOCKSIZE + 1,
 167                         p_nodes_max.Y / MAP_BLOCKSIZE + 1,
 168                         p_nodes_max.Z / MAP_BLOCKSIZE + 1);
 169 }
 170
 171 void ClientMap::updateDrawList(video::IVideoDriver* driver)
 172 {
 173         ScopeProfiler sp(g_profiler, "CM::updateDrawList()", SPT_AVG);
 174         g_profiler->add("CM::updateDrawList() count", 1);
 175
 176         INodeDefManager *nodemgr = m_gamedef->ndef();
 177
 178         for (std::map<v3s16, MapBlock*>::iterator i = m_drawlist.begin();
 179                         i != m_drawlist.end(); ++i) {
 180                 MapBlock *block = i->second;
 181                 block->refDrop();
 182         }
 183         m_drawlist.clear();
 184
 185         v3f camera_position = m_camera_position;
 186         v3f camera_direction = m_camera_direction;
 187         f32 camera_fov = m_camera_fov;
 188
 189         // Use a higher fov to accomodate faster camera movements.
 190         // Blocks are cropped better when they are drawn.
 191         // Or maybe they aren't? Well whatever.
 192         camera_fov *= 1.2;
 193
 194         v3s16 cam_pos_nodes = floatToInt(camera_position, BS);
 195         v3s16 p_blocks_min;
 196         v3s16 p_blocks_max;
 197         getBlocksInViewRange(cam_pos_nodes, &p_blocks_min, &p_blocks_max);
 198
 199         // Number of blocks in rendering range
 200         u32 blocks_in_range = 0;
 201         // Number of blocks occlusion culled
 202         u32 blocks_occlusion_culled = 0;
 203         // Number of blocks in rendering range but don't have a mesh
 204         u32 blocks_in_range_without_mesh = 0;
 205         // Blocks that had mesh that would have been drawn according to
 206         // rendering range (if max blocks limit didn't kick in)
 207         u32 blocks_would_have_drawn = 0;
 208         // Blocks that were drawn and had a mesh
 209         u32 blocks_drawn = 0;
 210         // Blocks which had a corresponding meshbuffer for this pass
 211         //u32 blocks_had_pass_meshbuf = 0;
 212         // Blocks from which stuff was actually drawn
 213         //u32 blocks_without_stuff = 0;
 214         // Distance to farthest drawn block
 215         float farthest_drawn = 0;
 216
 217         for (std::map<v2s16, MapSector*>::iterator si = m_sectors.begin();
 218                         si != m_sectors.end(); ++si) {
 219                 MapSector *sector = si->second;
 220                 v2s16 sp = sector->getPos();
 221
 222                 if (m_control.range_all == false) {
 223                         if (sp.X < p_blocks_min.X || sp.X > p_blocks_max.X ||
 224                                         sp.Y < p_blocks_min.Z || sp.Y > p_blocks_max.Z)
 225                                 continue;
 226                 }
 227
 228                 MapBlockVect sectorblocks;
 229                 sector->getBlocks(sectorblocks);
 230
 231                 /*
 232                         Loop through blocks in sector
 233                 */
 234
 235                 u32 sector_blocks_drawn = 0;
 236
 237                 for (MapBlockVect::iterator i = sectorblocks.begin();
 238                                 i != sectorblocks.end(); ++i) {
 239                         MapBlock *block = *i;
 240
 241                         /*
 242                                 Compare block position to camera position, skip
 243                                 if not seen on display
 244                         */
 245
 246                         if (block->mesh != NULL)
 247                                 block->mesh->updateCameraOffset(m_camera_offset);
 248
 249                         float range = 100000 * BS;
 250                         if (m_control.range_all == false)
 251                                 range = m_control.wanted_range * BS;
 252
 253                         float d = 0.0;
 254                         if (!isBlockInSight(block->getPos(), camera_position,
 255                                         camera_direction, camera_fov, range, &d))
 256                                 continue;
 257
 258                         // This is ugly (spherical distance limit?)
 259                         /*if(m_control.range_all == false &&
 260                                         d - 0.5*BS*MAP_BLOCKSIZE > range)
 261                                 continue;*/
 262
 263                         blocks_in_range++;
 264
 265                         /*
 266                                 Ignore if mesh doesn't exist
 267                         */
 268                         {
 269                                 //MutexAutoLock lock(block->mesh_mutex);
 270
 271                                 if (block->mesh == NULL) {
 272                                         blocks_in_range_without_mesh++;
 273                                         continue;
 274                                 }
 275                         }
 276
 277                         /*
 278                                 Occlusion culling
 279                         */
 280
 281                         // No occlusion culling when free_move is on and camera is
 282                         // inside ground
 283                         bool occlusion_culling_enabled = true;
 284                         if (g_settings->getBool("free_move")) {
 285                                 MapNode n = getNodeNoEx(cam_pos_nodes);
 286                                 if (n.getContent() == CONTENT_IGNORE ||
 287                                                 nodemgr->get(n).solidness == 2)
 288                                         occlusion_culling_enabled = false;
 289                         }
 290
 291                         v3s16 cpn = block->getPos() * MAP_BLOCKSIZE;
 292                         cpn += v3s16(MAP_BLOCKSIZE / 2, MAP_BLOCKSIZE / 2, MAP_BLOCKSIZE / 2);
 293                         float step = BS * 1;
 294                         float stepfac = 1.1;
 295                         float startoff = BS * 1;
 296                         float endoff = -BS*MAP_BLOCKSIZE * 1.42 * 1.42;
 297                         v3s16 spn = cam_pos_nodes + v3s16(0, 0, 0);
 298                         s16 bs2 = MAP_BLOCKSIZE / 2 + 1;
 299                         u32 needed_count = 1;
 300                         if (occlusion_culling_enabled &&
 301                                         isOccluded(this, spn, cpn + v3s16(0, 0, 0),
 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                                         isOccluded(this, spn, cpn + v3s16(-bs2,-bs2,-bs2),
 318                                                 step, stepfac, startoff, endoff, needed_count, nodemgr)) {
 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 &&
 330                                         d > m_control.wanted_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                 m_last_drawn_sectors.clear();
 418
 419         /*
 420                 Get time for measuring timeout.
 421
 422                 Measuring time is very useful for long delays when the
 423                 machine is swapping a lot.
 424         */
 425         int time1 = time(0);
 426
 427         /*
 428                 Get animation parameters
 429         */
 430         float animation_time = m_client->getAnimationTime();
 431         int crack = m_client->getCrackLevel();
 432         u32 daynight_ratio = m_client->getEnv().getDayNightRatio();
 433
 434         v3f camera_position = m_camera_position;
 435         v3f camera_direction = m_camera_direction;
 436         f32 camera_fov = m_camera_fov;
 437
 438         /*
 439                 Get all blocks and draw all visible ones
 440         */
 441
 442         v3s16 cam_pos_nodes = floatToInt(camera_position, BS);
 443         v3s16 p_blocks_min;
 444         v3s16 p_blocks_max;
 445         getBlocksInViewRange(cam_pos_nodes, &p_blocks_min, &p_blocks_max);
 446
 447         u32 vertex_count = 0;
 448         u32 meshbuffer_count = 0;
 449
 450         // For limiting number of mesh animations per frame
 451         u32 mesh_animate_count = 0;
 452         u32 mesh_animate_count_far = 0;
 453
 454         // Blocks that were drawn and had a mesh
 455         u32 blocks_drawn = 0;
 456         // Blocks which had a corresponding meshbuffer for this pass
 457         u32 blocks_had_pass_meshbuf = 0;
 458         // Blocks from which stuff was actually drawn
 459         u32 blocks_without_stuff = 0;
 460
 461         /*
 462                 Draw the selected MapBlocks
 463         */
 464
 465         {
 466         ScopeProfiler sp(g_profiler, prefix + "drawing blocks", SPT_AVG);
 467
 468         MeshBufListList drawbufs;
 469
 470         for (std::map<v3s16, MapBlock*>::iterator i = m_drawlist.begin();
 471                         i != m_drawlist.end(); ++i) {
 472                 MapBlock *block = i->second;
 473
 474                 // If the mesh of the block happened to get deleted, ignore it
 475                 if (block->mesh == NULL)
 476                         continue;
 477
 478                 float d = 0.0;
 479                 if (!isBlockInSight(block->getPos(), camera_position,
 480                                 camera_direction, camera_fov, 100000 * BS, &d))
 481                         continue;
 482
 483                 // Mesh animation
 484                 {
 485                         //MutexAutoLock lock(block->mesh_mutex);
 486                         MapBlockMesh *mapBlockMesh = block->mesh;
 487                         assert(mapBlockMesh);
 488                         // Pretty random but this should work somewhat nicely
 489                         bool faraway = d >= BS * 50;
 490                         //bool faraway = d >= m_control.wanted_range * BS;
 491                         if (mapBlockMesh->isAnimationForced() || !faraway ||
 492                                         mesh_animate_count_far < (m_control.range_all ? 200 : 50)) {
 493                                 bool animated = mapBlockMesh->animate(faraway, animation_time,
 494                                         crack, daynight_ratio);
 495                                 if (animated)
 496                                         mesh_animate_count++;
 497                                 if (animated && faraway)
 498                                         mesh_animate_count_far++;
 499                         } else {
 500                                 mapBlockMesh->decreaseAnimationForceTimer();
 501                         }
 502                 }
 503
 504                 /*
 505                         Get the meshbuffers of the block
 506                 */
 507                 {
 508                         //MutexAutoLock lock(block->mesh_mutex);
 509
 510                         MapBlockMesh *mapBlockMesh = block->mesh;
 511                         assert(mapBlockMesh);
 512
 513                         scene::IMesh *mesh = mapBlockMesh->getMesh();
 514                         assert(mesh);
 515
 516                         u32 c = mesh->getMeshBufferCount();
 517                         for (u32 i = 0; i < c; i++)
 518                         {
 519                                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 520
 521                                 buf->getMaterial().setFlag(video::EMF_TRILINEAR_FILTER, m_cache_trilinear_filter);
 522                                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, m_cache_bilinear_filter);
 523                                 buf->getMaterial().setFlag(video::EMF_ANISOTROPIC_FILTER, m_cache_anistropic_filter);
 524
 525                                 const video::SMaterial& material = buf->getMaterial();
 526                                 video::IMaterialRenderer* rnd =
 527                                                 driver->getMaterialRenderer(material.MaterialType);
 528                                 bool transparent = (rnd && rnd->isTransparent());
 529                                 if (transparent == is_transparent_pass) {
 530                                         if (buf->getVertexCount() == 0)
 531                                                 errorstream << "Block [" << analyze_block(block)
 532                                                          << "] contains an empty meshbuf" << std::endl;
 533                                         drawbufs.add(buf);
 534                                 }
 535                         }
 536                 }
 537         }
 538
 539         std::vector<MeshBufList> &lists = drawbufs.lists;
 540
 541         int timecheck_counter = 0;
 542         for (std::vector<MeshBufList>::iterator i = lists.begin();
 543                         i != lists.end(); ++i) {
 544                 timecheck_counter++;
 545                 if (timecheck_counter > 50) {
 546                         timecheck_counter = 0;
 547                         int time2 = time(0);
 548                         if (time2 > time1 + 4) {
 549                                 infostream << "ClientMap::renderMap(): "
 550                                         "Rendering takes ages, returning."
 551                                         << std::endl;
 552                                 return;
 553                         }
 554                 }
 555
 556                 MeshBufList &list = *i;
 557
 558                 driver->setMaterial(list.m);
 559
 560                 for (std::vector<scene::IMeshBuffer*>::iterator j = list.bufs.begin();
 561                                 j != list.bufs.end(); ++j) {
 562                         scene::IMeshBuffer *buf = *j;
 563                         driver->drawMeshBuffer(buf);
 564                         vertex_count += buf->getVertexCount();
 565                         meshbuffer_count++;
 566                 }
 567
 568         }
 569         } // ScopeProfiler
 570
 571         // Log only on solid pass because values are the same
 572         if (pass == scene::ESNRP_SOLID) {
 573                 g_profiler->avg("CM: animated meshes", mesh_animate_count);
 574                 g_profiler->avg("CM: animated meshes (far)", mesh_animate_count_far);
 575         }
 576
 577         g_profiler->avg(prefix + "vertices drawn", vertex_count);
 578         if (blocks_had_pass_meshbuf != 0)
 579                 g_profiler->avg(prefix + "meshbuffers per block",
 580                         (float)meshbuffer_count / (float)blocks_had_pass_meshbuf);
 581         if (blocks_drawn != 0)
 582                 g_profiler->avg(prefix + "empty blocks (frac)",
 583                         (float)blocks_without_stuff / blocks_drawn);
 584
 585         /*infostream<<"renderMap(): is_transparent_pass="<<is_transparent_pass
 586                         <<", rendered "<<vertex_count<<" vertices."<<std::endl;*/
 587 }
 588
 589 static bool getVisibleBrightness(Map *map, v3f p0, v3f dir, float step,
 590                 float step_multiplier, float start_distance, float end_distance,
 591                 INodeDefManager *ndef, u32 daylight_factor, float sunlight_min_d,
 592                 int *result, bool *sunlight_seen)
 593 {
 594         int brightness_sum = 0;
 595         int brightness_count = 0;
 596         float distance = start_distance;
 597         dir.normalize();
 598         v3f pf = p0;
 599         pf += dir * distance;
 600         int noncount = 0;
 601         bool nonlight_seen = false;
 602         bool allow_allowing_non_sunlight_propagates = false;
 603         bool allow_non_sunlight_propagates = false;
 604         // Check content nearly at camera position
 605         {
 606                 v3s16 p = floatToInt(p0 /*+ dir * 3*BS*/, BS);
 607                 MapNode n = map->getNodeNoEx(p);
 608                 if(ndef->get(n).param_type == CPT_LIGHT &&
 609                                 !ndef->get(n).sunlight_propagates)
 610                         allow_allowing_non_sunlight_propagates = true;
 611         }
 612         // If would start at CONTENT_IGNORE, start closer
 613         {
 614                 v3s16 p = floatToInt(pf, BS);
 615                 MapNode n = map->getNodeNoEx(p);
 616                 if(n.getContent() == CONTENT_IGNORE){
 617                         float newd = 2*BS;
 618                         pf = p0 + dir * 2*newd;
 619                         distance = newd;
 620                         sunlight_min_d = 0;
 621                 }
 622         }
 623         for(int i=0; distance < end_distance; i++){
 624                 pf += dir * step;
 625                 distance += step;
 626                 step *= step_multiplier;
 627
 628                 v3s16 p = floatToInt(pf, BS);
 629                 MapNode n = map->getNodeNoEx(p);
 630                 if(allow_allowing_non_sunlight_propagates && i == 0 &&
 631                                 ndef->get(n).param_type == CPT_LIGHT &&
 632                                 !ndef->get(n).sunlight_propagates){
 633                         allow_non_sunlight_propagates = true;
 634                 }
 635                 if(ndef->get(n).param_type != CPT_LIGHT ||
 636                                 (!ndef->get(n).sunlight_propagates &&
 637                                         !allow_non_sunlight_propagates)){
 638                         nonlight_seen = true;
 639                         noncount++;
 640                         if(noncount >= 4)
 641                                 break;
 642                         continue;
 643                 }
 644                 if(distance >= sunlight_min_d && *sunlight_seen == false
 645                                 && nonlight_seen == false)
 646                         if(n.getLight(LIGHTBANK_DAY, ndef) == LIGHT_SUN)
 647                                 *sunlight_seen = true;
 648                 noncount = 0;
 649                 brightness_sum += decode_light(n.getLightBlend(daylight_factor, ndef));
 650                 brightness_count++;
 651         }
 652         *result = 0;
 653         if(brightness_count == 0)
 654                 return false;
 655         *result = brightness_sum / brightness_count;
 656         /*std::cerr<<"Sampled "<<brightness_count<<" points; result="
 657                         <<(*result)<<std::endl;*/
 658         return true;
 659 }
 660
 661 int ClientMap::getBackgroundBrightness(float max_d, u32 daylight_factor,
 662                 int oldvalue, bool *sunlight_seen_result)
 663 {
 664         const bool debugprint = false;
 665         INodeDefManager *ndef = m_gamedef->ndef();
 666         static v3f z_directions[50] = {
 667                 v3f(-100, 0, 0)
 668         };
 669         static f32 z_offsets[sizeof(z_directions)/sizeof(*z_directions)] = {
 670                 -1000,
 671         };
 672         if(z_directions[0].X < -99){
 673                 for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 674                         z_directions[i] = v3f(
 675                                 0.01 * myrand_range(-100, 100),
 676                                 1.0,
 677                                 0.01 * myrand_range(-100, 100)
 678                         );
 679                         z_offsets[i] = 0.01 * myrand_range(0,100);
 680                 }
 681         }
 682         if(debugprint)
 683                 std::cerr<<"In goes "<<PP(m_camera_direction)<<", out comes ";
 684         int sunlight_seen_count = 0;
 685         float sunlight_min_d = max_d*0.8;
 686         if(sunlight_min_d > 35*BS)
 687                 sunlight_min_d = 35*BS;
 688         std::vector<int> values;
 689         for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 690                 v3f z_dir = z_directions[i];
 691                 z_dir.normalize();
 692                 core::CMatrix4<f32> a;
 693                 a.buildRotateFromTo(v3f(0,1,0), z_dir);
 694                 v3f dir = m_camera_direction;
 695                 a.rotateVect(dir);
 696                 int br = 0;
 697                 float step = BS*1.5;
 698                 if(max_d > 35*BS)
 699                         step = max_d / 35 * 1.5;
 700                 float off = step * z_offsets[i];
 701                 bool sunlight_seen_now = false;
 702                 bool ok = getVisibleBrightness(this, m_camera_position, dir,
 703                                 step, 1.0, max_d*0.6+off, max_d, ndef, daylight_factor,
 704                                 sunlight_min_d,
 705                                 &br, &sunlight_seen_now);
 706                 if(sunlight_seen_now)
 707                         sunlight_seen_count++;
 708                 if(!ok)
 709                         continue;
 710                 values.push_back(br);
 711                 // Don't try too much if being in the sun is clear
 712                 if(sunlight_seen_count >= 20)
 713                         break;
 714         }
 715         int brightness_sum = 0;
 716         int brightness_count = 0;
 717         std::sort(values.begin(), values.end());
 718         u32 num_values_to_use = values.size();
 719         if(num_values_to_use >= 10)
 720                 num_values_to_use -= num_values_to_use/2;
 721         else if(num_values_to_use >= 7)
 722                 num_values_to_use -= num_values_to_use/3;
 723         u32 first_value_i = (values.size() - num_values_to_use) / 2;
 724         if(debugprint){
 725                 for(u32 i=0; i < first_value_i; i++)
 726                         std::cerr<<values[i]<<" ";
 727                 std::cerr<<"[";
 728         }
 729         for(u32 i=first_value_i; i < first_value_i+num_values_to_use; i++){
 730                 if(debugprint)
 731                         std::cerr<<values[i]<<" ";
 732                 brightness_sum += values[i];
 733                 brightness_count++;
 734         }
 735         if(debugprint){
 736                 std::cerr<<"]";
 737                 for(u32 i=first_value_i+num_values_to_use; i < values.size(); i++)
 738                         std::cerr<<values[i]<<" ";
 739         }
 740         int ret = 0;
 741         if(brightness_count == 0){
 742                 MapNode n = getNodeNoEx(floatToInt(m_camera_position, BS));
 743                 if(ndef->get(n).param_type == CPT_LIGHT){
 744                         ret = decode_light(n.getLightBlend(daylight_factor, ndef));
 745                 } else {
 746                         ret = oldvalue;
 747                 }
 748         } else {
 749                 /*float pre = (float)brightness_sum / (float)brightness_count;
 750                 float tmp = pre;
 751                 const float d = 0.2;
 752                 pre *= 1.0 + d*2;
 753                 pre -= tmp * d;
 754                 int preint = pre;
 755                 ret = MYMAX(0, MYMIN(255, preint));*/
 756                 ret = brightness_sum / brightness_count;
 757         }
 758         if(debugprint)
 759                 std::cerr<<"Result: "<<ret<<" sunlight_seen_count="
 760                                 <<sunlight_seen_count<<std::endl;
 761         *sunlight_seen_result = (sunlight_seen_count > 0);
 762         return ret;
 763 }
 764
 765 void ClientMap::renderPostFx(CameraMode cam_mode)
 766 {
 767         INodeDefManager *nodemgr = m_gamedef->ndef();
 768
 769         // Sadly ISceneManager has no "post effects" render pass, in that case we
 770         // could just register for that and handle it in renderMap().
 771
 772         MapNode n = getNodeNoEx(floatToInt(m_camera_position, BS));
 773
 774         // - If the player is in a solid node, make everything black.
 775         // - If the player is in liquid, draw a semi-transparent overlay.
 776         // - Do not if player is in third person mode
 777         const ContentFeatures& features = nodemgr->get(n);
 778         video::SColor post_effect_color = features.post_effect_color;
 779         if(features.solidness == 2 && !(g_settings->getBool("noclip") &&
 780                         m_gamedef->checkLocalPrivilege("noclip")) &&
 781                         cam_mode == CAMERA_MODE_FIRST)
 782         {
 783                 post_effect_color = video::SColor(255, 0, 0, 0);
 784         }
 785         if (post_effect_color.getAlpha() != 0)
 786         {
 787                 // Draw a full-screen rectangle
 788                 video::IVideoDriver* driver = SceneManager->getVideoDriver();
 789                 v2u32 ss = driver->getScreenSize();
 790                 core::rect<s32> rect(0,0, ss.X, ss.Y);
 791                 driver->draw2DRectangle(post_effect_color, rect);
 792         }
 793 }
 794
 795 void ClientMap::PrintInfo(std::ostream &out)
 796 {
 797         out<<"ClientMap: ";
 798 }
 799
 800