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/basic_macros.h"
  33 #include <algorithm>
  34
  35 ClientMap::ClientMap(
  36                 Client *client,
  37                 MapDrawControl &control,
  38                 scene::ISceneNode* parent,
  39                 scene::ISceneManager* mgr,
  40                 s32 id
  41 ):
  42         Map(dout_client, client),
  43         scene::ISceneNode(parent, mgr, id),
  44         m_client(client),
  45         m_control(control),
  46         m_camera_position(0,0,0),
  47         m_camera_direction(0,0,1),
  48         m_camera_fov(M_PI)
  49 {
  50         m_box = aabb3f(-BS*1000000,-BS*1000000,-BS*1000000,
  51                         BS*1000000,BS*1000000,BS*1000000);
  52
  53         /* TODO: Add a callback function so these can be updated when a setting
  54          *       changes.  At this point in time it doesn't matter (e.g. /set
  55          *       is documented to change server settings only)
  56          *
  57          * TODO: Local caching of settings is not optimal and should at some stage
  58          *       be updated to use a global settings object for getting thse values
  59          *       (as opposed to the this local caching). This can be addressed in
  60          *       a later release.
  61          */
  62         m_cache_trilinear_filter  = g_settings->getBool("trilinear_filter");
  63         m_cache_bilinear_filter   = g_settings->getBool("bilinear_filter");
  64         m_cache_anistropic_filter = g_settings->getBool("anisotropic_filter");
  65
  66 }
  67
  68 ClientMap::~ClientMap()
  69 {
  70 }
  71
  72 MapSector * ClientMap::emergeSector(v2s16 p2d)
  73 {
  74         DSTACK(FUNCTION_NAME);
  75         // Check that it doesn't exist already
  76         try{
  77                 return getSectorNoGenerate(p2d);
  78         }
  79         catch(InvalidPositionException &e)
  80         {
  81         }
  82
  83         // Create a sector
  84         ClientMapSector *sector = new ClientMapSector(this, p2d, m_gamedef);
  85
  86         {
  87                 //MutexAutoLock lock(m_sector_mutex); // Bulk comment-out
  88                 m_sectors[p2d] = sector;
  89         }
  90
  91         return sector;
  92 }
  93
  94 void ClientMap::OnRegisterSceneNode()
  95 {
  96         if(IsVisible)
  97         {
  98                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
  99                 SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
 100         }
 101
 102         ISceneNode::OnRegisterSceneNode();
 103 }
 104
 105 void ClientMap::getBlocksInViewRange(v3s16 cam_pos_nodes,
 106                 v3s16 *p_blocks_min, v3s16 *p_blocks_max)
 107 {
 108         v3s16 box_nodes_d = m_control.wanted_range * v3s16(1, 1, 1);
 109         // Define p_nodes_min/max as v3s32 because 'cam_pos_nodes -/+ box_nodes_d'
 110         // can exceed the range of v3s16 when a large view range is used near the
 111         // world edges.
 112         v3s32 p_nodes_min(
 113                 cam_pos_nodes.X - box_nodes_d.X,
 114                 cam_pos_nodes.Y - box_nodes_d.Y,
 115                 cam_pos_nodes.Z - box_nodes_d.Z);
 116         v3s32 p_nodes_max(
 117                 cam_pos_nodes.X + box_nodes_d.X,
 118                 cam_pos_nodes.Y + box_nodes_d.Y,
 119                 cam_pos_nodes.Z + box_nodes_d.Z);
 120         // Take a fair amount as we will be dropping more out later
 121         // Umm... these additions are a bit strange but they are needed.
 122         *p_blocks_min = v3s16(
 123                         p_nodes_min.X / MAP_BLOCKSIZE - 3,
 124                         p_nodes_min.Y / MAP_BLOCKSIZE - 3,
 125                         p_nodes_min.Z / MAP_BLOCKSIZE - 3);
 126         *p_blocks_max = v3s16(
 127                         p_nodes_max.X / MAP_BLOCKSIZE + 1,
 128                         p_nodes_max.Y / MAP_BLOCKSIZE + 1,
 129                         p_nodes_max.Z / MAP_BLOCKSIZE + 1);
 130 }
 131
 132 void ClientMap::updateDrawList(video::IVideoDriver* driver)
 133 {
 134         ScopeProfiler sp(g_profiler, "CM::updateDrawList()", SPT_AVG);
 135         g_profiler->add("CM::updateDrawList() count", 1);
 136
 137         for (std::map<v3s16, MapBlock*>::iterator i = m_drawlist.begin();
 138                         i != m_drawlist.end(); ++i) {
 139                 MapBlock *block = i->second;
 140                 block->refDrop();
 141         }
 142         m_drawlist.clear();
 143
 144         v3f camera_position = m_camera_position;
 145         v3f camera_direction = m_camera_direction;
 146         f32 camera_fov = m_camera_fov;
 147
 148         // Use a higher fov to accomodate faster camera movements.
 149         // Blocks are cropped better when they are drawn.
 150         // Or maybe they aren't? Well whatever.
 151         camera_fov *= 1.2;
 152
 153         v3s16 cam_pos_nodes = floatToInt(camera_position, BS);
 154         v3s16 p_blocks_min;
 155         v3s16 p_blocks_max;
 156         getBlocksInViewRange(cam_pos_nodes, &p_blocks_min, &p_blocks_max);
 157
 158         // Number of blocks in rendering range
 159         u32 blocks_in_range = 0;
 160         // Number of blocks occlusion culled
 161         u32 blocks_occlusion_culled = 0;
 162         // Number of blocks in rendering range but don't have a mesh
 163         u32 blocks_in_range_without_mesh = 0;
 164         // Blocks that had mesh that would have been drawn according to
 165         // rendering range (if max blocks limit didn't kick in)
 166         u32 blocks_would_have_drawn = 0;
 167         // Blocks that were drawn and had a mesh
 168         u32 blocks_drawn = 0;
 169         // Blocks which had a corresponding meshbuffer for this pass
 170         //u32 blocks_had_pass_meshbuf = 0;
 171         // Blocks from which stuff was actually drawn
 172         //u32 blocks_without_stuff = 0;
 173         // Distance to farthest drawn block
 174         float farthest_drawn = 0;
 175
 176         // No occlusion culling when free_move is on and camera is
 177         // inside ground
 178         bool occlusion_culling_enabled = true;
 179         if (g_settings->getBool("free_move")) {
 180                 MapNode n = getNodeNoEx(cam_pos_nodes);
 181                 if (n.getContent() == CONTENT_IGNORE ||
 182                                 m_nodedef->get(n).solidness == 2)
 183                         occlusion_culling_enabled = false;
 184         }
 185
 186         for (std::map<v2s16, MapSector*>::iterator si = m_sectors.begin();
 187                         si != m_sectors.end(); ++si) {
 188                 MapSector *sector = si->second;
 189                 v2s16 sp = sector->getPos();
 190
 191                 if (m_control.range_all == false) {
 192                         if (sp.X < p_blocks_min.X || sp.X > p_blocks_max.X ||
 193                                         sp.Y < p_blocks_min.Z || sp.Y > p_blocks_max.Z)
 194                                 continue;
 195                 }
 196
 197                 MapBlockVect sectorblocks;
 198                 sector->getBlocks(sectorblocks);
 199
 200                 /*
 201                         Loop through blocks in sector
 202                 */
 203
 204                 u32 sector_blocks_drawn = 0;
 205
 206                 for (MapBlockVect::iterator i = sectorblocks.begin();
 207                                 i != sectorblocks.end(); ++i) {
 208                         MapBlock *block = *i;
 209
 210                         /*
 211                                 Compare block position to camera position, skip
 212                                 if not seen on display
 213                         */
 214
 215                         if (block->mesh)
 216                                 block->mesh->updateCameraOffset(m_camera_offset);
 217
 218                         float range = 100000 * BS;
 219                         if (!m_control.range_all)
 220                                 range = m_control.wanted_range * BS;
 221
 222                         float d = 0.0;
 223                         if (!isBlockInSight(block->getPos(), camera_position,
 224                                         camera_direction, camera_fov, range, &d))
 225                                 continue;
 226
 227                         blocks_in_range++;
 228
 229                         /*
 230                                 Ignore if mesh doesn't exist
 231                         */
 232                         if (!block->mesh) {
 233                                 blocks_in_range_without_mesh++;
 234                                 continue;
 235                         }
 236
 237                         /*
 238                                 Occlusion culling
 239                         */
 240                         if (occlusion_culling_enabled && isBlockOccluded(block, cam_pos_nodes)) {
 241                                 blocks_occlusion_culled++;
 242                                 continue;
 243                         }
 244
 245                         // This block is in range. Reset usage timer.
 246                         block->resetUsageTimer();
 247
 248                         // Limit block count in case of a sudden increase
 249                         blocks_would_have_drawn++;
 250                         if (blocks_drawn >= m_control.wanted_max_blocks &&
 251                                         !m_control.range_all &&
 252                                         d > m_control.wanted_range * BS)
 253                                 continue;
 254
 255                         // Add to set
 256                         block->refGrab();
 257                         m_drawlist[block->getPos()] = block;
 258
 259                         sector_blocks_drawn++;
 260                         blocks_drawn++;
 261                         if (d / BS > farthest_drawn)
 262                                 farthest_drawn = d / BS;
 263
 264                 } // foreach sectorblocks
 265
 266                 if (sector_blocks_drawn != 0)
 267                         m_last_drawn_sectors.insert(sp);
 268         }
 269
 270         m_control.blocks_would_have_drawn = blocks_would_have_drawn;
 271         m_control.blocks_drawn = blocks_drawn;
 272         m_control.farthest_drawn = farthest_drawn;
 273
 274         g_profiler->avg("CM: blocks in range", blocks_in_range);
 275         g_profiler->avg("CM: blocks occlusion culled", blocks_occlusion_culled);
 276         if (blocks_in_range != 0)
 277                 g_profiler->avg("CM: blocks in range without mesh (frac)",
 278                                 (float)blocks_in_range_without_mesh / blocks_in_range);
 279         g_profiler->avg("CM: blocks drawn", blocks_drawn);
 280         g_profiler->avg("CM: farthest drawn", farthest_drawn);
 281         g_profiler->avg("CM: wanted max blocks", m_control.wanted_max_blocks);
 282 }
 283
 284 struct MeshBufList
 285 {
 286         /*!
 287          * Specifies in which layer the list is.
 288          * All lists which are in a lower layer are rendered before this list.
 289          */
 290         u8 layer;
 291         video::SMaterial m;
 292         std::vector<scene::IMeshBuffer*> bufs;
 293 };
 294
 295 struct MeshBufListList
 296 {
 297         std::vector<MeshBufList> lists;
 298
 299         void clear()
 300         {
 301                 lists.clear();
 302         }
 303
 304         void add(scene::IMeshBuffer *buf, u8 layer)
 305         {
 306                 const video::SMaterial &m = buf->getMaterial();
 307                 for(std::vector<MeshBufList>::iterator i = lists.begin();
 308                                 i != lists.end(); ++i){
 309                         MeshBufList &l = *i;
 310
 311                         // comparing a full material is quite expensive so we don't do it if
 312                         // not even first texture is equal
 313                         if (l.m.TextureLayer[0].Texture != m.TextureLayer[0].Texture)
 314                                 continue;
 315
 316                         if(l.layer != layer)
 317                                 continue;
 318
 319                         if (l.m == m) {
 320                                 l.bufs.push_back(buf);
 321                                 return;
 322                         }
 323                 }
 324                 MeshBufList l;
 325                 l.layer = layer;
 326                 l.m = m;
 327                 l.bufs.push_back(buf);
 328                 lists.push_back(l);
 329         }
 330 };
 331
 332 void ClientMap::renderMap(video::IVideoDriver* driver, s32 pass)
 333 {
 334         DSTACK(FUNCTION_NAME);
 335
 336         bool is_transparent_pass = pass == scene::ESNRP_TRANSPARENT;
 337
 338         std::string prefix;
 339         if (pass == scene::ESNRP_SOLID)
 340                 prefix = "CM: solid: ";
 341         else
 342                 prefix = "CM: transparent: ";
 343
 344         /*
 345                 This is called two times per frame, reset on the non-transparent one
 346         */
 347         if (pass == scene::ESNRP_SOLID)
 348                 m_last_drawn_sectors.clear();
 349
 350         /*
 351                 Get time for measuring timeout.
 352
 353                 Measuring time is very useful for long delays when the
 354                 machine is swapping a lot.
 355         */
 356         int time1 = time(0);
 357
 358         /*
 359                 Get animation parameters
 360         */
 361         float animation_time = m_client->getAnimationTime();
 362         int crack = m_client->getCrackLevel();
 363         u32 daynight_ratio = m_client->getEnv().getDayNightRatio();
 364
 365         v3f camera_position = m_camera_position;
 366         v3f camera_direction = m_camera_direction;
 367         f32 camera_fov = m_camera_fov;
 368
 369         /*
 370                 Get all blocks and draw all visible ones
 371         */
 372
 373         u32 vertex_count = 0;
 374         u32 meshbuffer_count = 0;
 375
 376         // For limiting number of mesh animations per frame
 377         u32 mesh_animate_count = 0;
 378         u32 mesh_animate_count_far = 0;
 379
 380         // Blocks that were drawn and had a mesh
 381         u32 blocks_drawn = 0;
 382         // Blocks which had a corresponding meshbuffer for this pass
 383         u32 blocks_had_pass_meshbuf = 0;
 384         // Blocks from which stuff was actually drawn
 385         u32 blocks_without_stuff = 0;
 386
 387         /*
 388                 Draw the selected MapBlocks
 389         */
 390
 391         {
 392         ScopeProfiler sp(g_profiler, prefix + "drawing blocks", SPT_AVG);
 393
 394         MeshBufListList drawbufs;
 395
 396         for (std::map<v3s16, MapBlock*>::iterator i = m_drawlist.begin();
 397                         i != m_drawlist.end(); ++i) {
 398                 MapBlock *block = i->second;
 399
 400                 // If the mesh of the block happened to get deleted, ignore it
 401                 if (!block->mesh)
 402                         continue;
 403
 404                 float d = 0.0;
 405                 if (!isBlockInSight(block->getPos(), camera_position,
 406                                 camera_direction, camera_fov, 100000 * BS, &d))
 407                         continue;
 408
 409                 // Mesh animation
 410                 if (pass == scene::ESNRP_SOLID) {
 411                         //MutexAutoLock lock(block->mesh_mutex);
 412                         MapBlockMesh *mapBlockMesh = block->mesh;
 413                         assert(mapBlockMesh);
 414                         // Pretty random but this should work somewhat nicely
 415                         bool faraway = d >= BS * 50;
 416                         //bool faraway = d >= m_control.wanted_range * BS;
 417                         if (mapBlockMesh->isAnimationForced() || !faraway ||
 418                                         mesh_animate_count_far < (m_control.range_all ? 200 : 50)) {
 419                                 bool animated = mapBlockMesh->animate(faraway, animation_time,
 420                                         crack, daynight_ratio);
 421                                 if (animated)
 422                                         mesh_animate_count++;
 423                                 if (animated && faraway)
 424                                         mesh_animate_count_far++;
 425                         } else {
 426                                 mapBlockMesh->decreaseAnimationForceTimer();
 427                         }
 428                 }
 429
 430                 /*
 431                         Get the meshbuffers of the block
 432                 */
 433                 {
 434                         //MutexAutoLock lock(block->mesh_mutex);
 435
 436                         MapBlockMesh *mapBlockMesh = block->mesh;
 437                         assert(mapBlockMesh);
 438
 439                         for (int layer = 0; layer < MAX_TILE_LAYERS; layer++) {
 440                                 scene::IMesh *mesh = mapBlockMesh->getMesh(layer);
 441                                 assert(mesh);
 442
 443                                 u32 c = mesh->getMeshBufferCount();
 444                                 for (u32 i = 0; i < c; i++) {
 445                                         scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 446
 447                                         video::SMaterial& material = buf->getMaterial();
 448                                         video::IMaterialRenderer* rnd =
 449                                                 driver->getMaterialRenderer(material.MaterialType);
 450                                         bool transparent = (rnd && rnd->isTransparent());
 451                                         if (transparent == is_transparent_pass) {
 452                                                 if (buf->getVertexCount() == 0)
 453                                                         errorstream << "Block [" << analyze_block(block)
 454                                                                 << "] contains an empty meshbuf" << std::endl;
 455
 456                                                 material.setFlag(video::EMF_TRILINEAR_FILTER,
 457                                                         m_cache_trilinear_filter);
 458                                                 material.setFlag(video::EMF_BILINEAR_FILTER,
 459                                                         m_cache_bilinear_filter);
 460                                                 material.setFlag(video::EMF_ANISOTROPIC_FILTER,
 461                                                         m_cache_anistropic_filter);
 462                                                 material.setFlag(video::EMF_WIREFRAME,
 463                                                         m_control.show_wireframe);
 464
 465                                                 drawbufs.add(buf, layer);
 466                                         }
 467                                 }
 468                         }
 469                 }
 470         }
 471
 472         std::vector<MeshBufList> &lists = drawbufs.lists;
 473
 474         int timecheck_counter = 0;
 475         for (std::vector<MeshBufList>::iterator i = lists.begin();
 476                         i != lists.end(); ++i) {
 477                 timecheck_counter++;
 478                 if (timecheck_counter > 50) {
 479                         timecheck_counter = 0;
 480                         int time2 = time(0);
 481                         if (time2 > time1 + 4) {
 482                                 infostream << "ClientMap::renderMap(): "
 483                                         "Rendering takes ages, returning."
 484                                         << std::endl;
 485                                 return;
 486                         }
 487                 }
 488
 489                 MeshBufList &list = *i;
 490
 491                 driver->setMaterial(list.m);
 492
 493                 for (std::vector<scene::IMeshBuffer*>::iterator j = list.bufs.begin();
 494                                 j != list.bufs.end(); ++j) {
 495                         scene::IMeshBuffer *buf = *j;
 496                         driver->drawMeshBuffer(buf);
 497                         vertex_count += buf->getVertexCount();
 498                         meshbuffer_count++;
 499                 }
 500
 501         }
 502         } // ScopeProfiler
 503
 504         // Log only on solid pass because values are the same
 505         if (pass == scene::ESNRP_SOLID) {
 506                 g_profiler->avg("CM: animated meshes", mesh_animate_count);
 507                 g_profiler->avg("CM: animated meshes (far)", mesh_animate_count_far);
 508         }
 509
 510         g_profiler->avg(prefix + "vertices drawn", vertex_count);
 511         if (blocks_had_pass_meshbuf != 0)
 512                 g_profiler->avg(prefix + "meshbuffers per block",
 513                         (float)meshbuffer_count / (float)blocks_had_pass_meshbuf);
 514         if (blocks_drawn != 0)
 515                 g_profiler->avg(prefix + "empty blocks (frac)",
 516                         (float)blocks_without_stuff / blocks_drawn);
 517
 518         /*infostream<<"renderMap(): is_transparent_pass="<<is_transparent_pass
 519                         <<", rendered "<<vertex_count<<" vertices."<<std::endl;*/
 520 }
 521
 522 static bool getVisibleBrightness(Map *map, v3f p0, v3f dir, float step,
 523                 float step_multiplier, float start_distance, float end_distance,
 524                 INodeDefManager *ndef, u32 daylight_factor, float sunlight_min_d,
 525                 int *result, bool *sunlight_seen)
 526 {
 527         int brightness_sum = 0;
 528         int brightness_count = 0;
 529         float distance = start_distance;
 530         dir.normalize();
 531         v3f pf = p0;
 532         pf += dir * distance;
 533         int noncount = 0;
 534         bool nonlight_seen = false;
 535         bool allow_allowing_non_sunlight_propagates = false;
 536         bool allow_non_sunlight_propagates = false;
 537         // Check content nearly at camera position
 538         {
 539                 v3s16 p = floatToInt(p0 /*+ dir * 3*BS*/, BS);
 540                 MapNode n = map->getNodeNoEx(p);
 541                 if(ndef->get(n).param_type == CPT_LIGHT &&
 542                                 !ndef->get(n).sunlight_propagates)
 543                         allow_allowing_non_sunlight_propagates = true;
 544         }
 545         // If would start at CONTENT_IGNORE, start closer
 546         {
 547                 v3s16 p = floatToInt(pf, BS);
 548                 MapNode n = map->getNodeNoEx(p);
 549                 if(n.getContent() == CONTENT_IGNORE){
 550                         float newd = 2*BS;
 551                         pf = p0 + dir * 2*newd;
 552                         distance = newd;
 553                         sunlight_min_d = 0;
 554                 }
 555         }
 556         for(int i=0; distance < end_distance; i++){
 557                 pf += dir * step;
 558                 distance += step;
 559                 step *= step_multiplier;
 560
 561                 v3s16 p = floatToInt(pf, BS);
 562                 MapNode n = map->getNodeNoEx(p);
 563                 if(allow_allowing_non_sunlight_propagates && i == 0 &&
 564                                 ndef->get(n).param_type == CPT_LIGHT &&
 565                                 !ndef->get(n).sunlight_propagates){
 566                         allow_non_sunlight_propagates = true;
 567                 }
 568                 if(ndef->get(n).param_type != CPT_LIGHT ||
 569                                 (!ndef->get(n).sunlight_propagates &&
 570                                         !allow_non_sunlight_propagates)){
 571                         nonlight_seen = true;
 572                         noncount++;
 573                         if(noncount >= 4)
 574                                 break;
 575                         continue;
 576                 }
 577                 if(distance >= sunlight_min_d && *sunlight_seen == false
 578                                 && nonlight_seen == false)
 579                         if(n.getLight(LIGHTBANK_DAY, ndef) == LIGHT_SUN)
 580                                 *sunlight_seen = true;
 581                 noncount = 0;
 582                 brightness_sum += decode_light(n.getLightBlend(daylight_factor, ndef));
 583                 brightness_count++;
 584         }
 585         *result = 0;
 586         if(brightness_count == 0)
 587                 return false;
 588         *result = brightness_sum / brightness_count;
 589         /*std::cerr<<"Sampled "<<brightness_count<<" points; result="
 590                         <<(*result)<<std::endl;*/
 591         return true;
 592 }
 593
 594 int ClientMap::getBackgroundBrightness(float max_d, u32 daylight_factor,
 595                 int oldvalue, bool *sunlight_seen_result)
 596 {
 597         const bool debugprint = false;
 598         static v3f z_directions[50] = {
 599                 v3f(-100, 0, 0)
 600         };
 601         static f32 z_offsets[sizeof(z_directions)/sizeof(*z_directions)] = {
 602                 -1000,
 603         };
 604         if(z_directions[0].X < -99){
 605                 for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 606                         z_directions[i] = v3f(
 607                                 0.01 * myrand_range(-100, 100),
 608                                 1.0,
 609                                 0.01 * myrand_range(-100, 100)
 610                         );
 611                         z_offsets[i] = 0.01 * myrand_range(0,100);
 612                 }
 613         }
 614         if(debugprint)
 615                 std::cerr<<"In goes "<<PP(m_camera_direction)<<", out comes ";
 616         int sunlight_seen_count = 0;
 617         float sunlight_min_d = max_d*0.8;
 618         if(sunlight_min_d > 35*BS)
 619                 sunlight_min_d = 35*BS;
 620         std::vector<int> values;
 621         for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 622                 v3f z_dir = z_directions[i];
 623                 z_dir.normalize();
 624                 core::CMatrix4<f32> a;
 625                 a.buildRotateFromTo(v3f(0,1,0), z_dir);
 626                 v3f dir = m_camera_direction;
 627                 a.rotateVect(dir);
 628                 int br = 0;
 629                 float step = BS*1.5;
 630                 if(max_d > 35*BS)
 631                         step = max_d / 35 * 1.5;
 632                 float off = step * z_offsets[i];
 633                 bool sunlight_seen_now = false;
 634                 bool ok = getVisibleBrightness(this, m_camera_position, dir,
 635                                 step, 1.0, max_d*0.6+off, max_d, m_nodedef, daylight_factor,
 636                                 sunlight_min_d,
 637                                 &br, &sunlight_seen_now);
 638                 if(sunlight_seen_now)
 639                         sunlight_seen_count++;
 640                 if(!ok)
 641                         continue;
 642                 values.push_back(br);
 643                 // Don't try too much if being in the sun is clear
 644                 if(sunlight_seen_count >= 20)
 645                         break;
 646         }
 647         int brightness_sum = 0;
 648         int brightness_count = 0;
 649         std::sort(values.begin(), values.end());
 650         u32 num_values_to_use = values.size();
 651         if(num_values_to_use >= 10)
 652                 num_values_to_use -= num_values_to_use/2;
 653         else if(num_values_to_use >= 7)
 654                 num_values_to_use -= num_values_to_use/3;
 655         u32 first_value_i = (values.size() - num_values_to_use) / 2;
 656         if(debugprint){
 657                 for(u32 i=0; i < first_value_i; i++)
 658                         std::cerr<<values[i]<<" ";
 659                 std::cerr<<"[";
 660         }
 661         for(u32 i=first_value_i; i < first_value_i+num_values_to_use; i++){
 662                 if(debugprint)
 663                         std::cerr<<values[i]<<" ";
 664                 brightness_sum += values[i];
 665                 brightness_count++;
 666         }
 667         if(debugprint){
 668                 std::cerr<<"]";
 669                 for(u32 i=first_value_i+num_values_to_use; i < values.size(); i++)
 670                         std::cerr<<values[i]<<" ";
 671         }
 672         int ret = 0;
 673         if(brightness_count == 0){
 674                 MapNode n = getNodeNoEx(floatToInt(m_camera_position, BS));
 675                 if(m_nodedef->get(n).param_type == CPT_LIGHT){
 676                         ret = decode_light(n.getLightBlend(daylight_factor, m_nodedef));
 677                 } else {
 678                         ret = oldvalue;
 679                 }
 680         } else {
 681                 /*float pre = (float)brightness_sum / (float)brightness_count;
 682                 float tmp = pre;
 683                 const float d = 0.2;
 684                 pre *= 1.0 + d*2;
 685                 pre -= tmp * d;
 686                 int preint = pre;
 687                 ret = MYMAX(0, MYMIN(255, preint));*/
 688                 ret = brightness_sum / brightness_count;
 689         }
 690         if(debugprint)
 691                 std::cerr<<"Result: "<<ret<<" sunlight_seen_count="
 692                                 <<sunlight_seen_count<<std::endl;
 693         *sunlight_seen_result = (sunlight_seen_count > 0);
 694         return ret;
 695 }
 696
 697 void ClientMap::renderPostFx(CameraMode cam_mode)
 698 {
 699         // Sadly ISceneManager has no "post effects" render pass, in that case we
 700         // could just register for that and handle it in renderMap().
 701
 702         MapNode n = getNodeNoEx(floatToInt(m_camera_position, BS));
 703
 704         // - If the player is in a solid node, make everything black.
 705         // - If the player is in liquid, draw a semi-transparent overlay.
 706         // - Do not if player is in third person mode
 707         const ContentFeatures& features = m_nodedef->get(n);
 708         video::SColor post_effect_color = features.post_effect_color;
 709         if(features.solidness == 2 && !(g_settings->getBool("noclip") &&
 710                         m_client->checkLocalPrivilege("noclip")) &&
 711                         cam_mode == CAMERA_MODE_FIRST)
 712         {
 713                 post_effect_color = video::SColor(255, 0, 0, 0);
 714         }
 715         if (post_effect_color.getAlpha() != 0)
 716         {
 717                 // Draw a full-screen rectangle
 718                 video::IVideoDriver* driver = SceneManager->getVideoDriver();
 719                 v2u32 ss = driver->getScreenSize();
 720                 core::rect<s32> rect(0,0, ss.X, ss.Y);
 721                 driver->draw2DRectangle(post_effect_color, rect);
 722         }
 723 }
 724
 725 void ClientMap::PrintInfo(std::ostream &out)
 726 {
 727         out<<"ClientMap: ";
 728 }
 729
 730