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