src/clientmap.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010-2012 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 General Public License as published by
   7 the Free Software Foundation; either version 2 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 General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "clientmap.h"
  21 #include "client.h"
  22 #include "mapblock_mesh.h"
  23 #include <IMaterialRenderer.h>
  24 #include <matrix4.h>
  25 #include "log.h"
  26 #include "mapsector.h"
  27 #include "main.h" // dout_client, g_settings
  28 #include "nodedef.h"
  29 #include "mapblock.h"
  30 #include "profiler.h"
  31 #include "settings.h"
  32
  33 #define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"
  34
  35 ClientMap::ClientMap(
  36                 Client *client,
  37                 IGameDef *gamedef,
  38                 MapDrawControl &control,
  39                 scene::ISceneNode* parent,
  40                 scene::ISceneManager* mgr,
  41                 s32 id
  42 ):
  43         Map(dout_client, gamedef),
  44         scene::ISceneNode(parent, mgr, id),
  45         m_client(client),
  46         m_control(control),
  47         m_camera_position(0,0,0),
  48         m_camera_direction(0,0,1),
  49         m_camera_fov(PI)
  50 {
  51         m_camera_mutex.Init();
  52         assert(m_camera_mutex.IsInitialized());
  53
  54         m_box = core::aabbox3d<f32>(-BS*1000000,-BS*1000000,-BS*1000000,
  55                         BS*1000000,BS*1000000,BS*1000000);
  56 }
  57
  58 ClientMap::~ClientMap()
  59 {
  60         /*JMutexAutoLock lock(mesh_mutex);
  61
  62         if(mesh != NULL)
  63         {
  64                 mesh->drop();
  65                 mesh = NULL;
  66         }*/
  67 }
  68
  69 MapSector * ClientMap::emergeSector(v2s16 p2d)
  70 {
  71         DSTACK(__FUNCTION_NAME);
  72         // Check that it doesn't exist already
  73         try{
  74                 return getSectorNoGenerate(p2d);
  75         }
  76         catch(InvalidPositionException &e)
  77         {
  78         }
  79
  80         // Create a sector
  81         ClientMapSector *sector = new ClientMapSector(this, p2d, m_gamedef);
  82
  83         {
  84                 //JMutexAutoLock lock(m_sector_mutex); // Bulk comment-out
  85                 m_sectors.insert(p2d, sector);
  86         }
  87
  88         return sector;
  89 }
  90
  91 #if 0
  92 void ClientMap::deSerializeSector(v2s16 p2d, std::istream &is)
  93 {
  94         DSTACK(__FUNCTION_NAME);
  95         ClientMapSector *sector = NULL;
  96
  97         //JMutexAutoLock lock(m_sector_mutex); // Bulk comment-out
  98
  99         core::map<v2s16, MapSector*>::Node *n = m_sectors.find(p2d);
 100
 101         if(n != NULL)
 102         {
 103                 sector = (ClientMapSector*)n->getValue();
 104                 assert(sector->getId() == MAPSECTOR_CLIENT);
 105         }
 106         else
 107         {
 108                 sector = new ClientMapSector(this, p2d);
 109                 {
 110                         //JMutexAutoLock lock(m_sector_mutex); // Bulk comment-out
 111                         m_sectors.insert(p2d, sector);
 112                 }
 113         }
 114
 115         sector->deSerialize(is);
 116 }
 117 #endif
 118
 119 void ClientMap::OnRegisterSceneNode()
 120 {
 121         if(IsVisible)
 122         {
 123                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
 124                 SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
 125         }
 126
 127         ISceneNode::OnRegisterSceneNode();
 128 }
 129
 130 static bool isOccluded(Map *map, v3s16 p0, v3s16 p1, float step, float stepfac,
 131                 float start_off, float end_off, u32 needed_count, INodeDefManager *nodemgr)
 132 {
 133         float d0 = (float)BS * p0.getDistanceFrom(p1);
 134         v3s16 u0 = p1 - p0;
 135         v3f uf = v3f(u0.X, u0.Y, u0.Z) * BS;
 136         uf.normalize();
 137         v3f p0f = v3f(p0.X, p0.Y, p0.Z) * BS;
 138         u32 count = 0;
 139         for(float s=start_off; s<d0+end_off; s+=step){
 140                 v3f pf = p0f + uf * s;
 141                 v3s16 p = floatToInt(pf, BS);
 142                 MapNode n = map->getNodeNoEx(p);
 143                 bool is_transparent = false;
 144                 const ContentFeatures &f = nodemgr->get(n);
 145                 if(f.solidness == 0)
 146                         is_transparent = (f.visual_solidness != 2);
 147                 else
 148                         is_transparent = (f.solidness != 2);
 149                 if(!is_transparent){
 150                         count++;
 151                         if(count >= needed_count)
 152                                 return true;
 153                 }
 154                 step *= stepfac;
 155         }
 156         return false;
 157 }
 158
 159 void ClientMap::renderMap(video::IVideoDriver* driver, s32 pass)
 160 {
 161         INodeDefManager *nodemgr = m_gamedef->ndef();
 162
 163         //m_dout<<DTIME<<"Rendering map..."<<std::endl;
 164         DSTACK(__FUNCTION_NAME);
 165
 166         bool is_transparent_pass = pass == scene::ESNRP_TRANSPARENT;
 167
 168         std::string prefix;
 169         if(pass == scene::ESNRP_SOLID)
 170                 prefix = "CM: solid: ";
 171         else
 172                 prefix = "CM: transparent: ";
 173
 174         /*
 175                 This is called two times per frame, reset on the non-transparent one
 176         */
 177         if(pass == scene::ESNRP_SOLID)
 178         {
 179                 m_last_drawn_sectors.clear();
 180         }
 181
 182         /*
 183                 Get time for measuring timeout.
 184
 185                 Measuring time is very useful for long delays when the
 186                 machine is swapping a lot.
 187         */
 188         int time1 = time(0);
 189
 190         /*
 191                 Get animation parameters
 192         */
 193         float animation_time = m_client->getAnimationTime();
 194         int crack = m_client->getCrackLevel();
 195         u32 daynight_ratio = m_client->getEnv().getDayNightRatio();
 196
 197         m_camera_mutex.Lock();
 198         v3f camera_position = m_camera_position;
 199         v3f camera_direction = m_camera_direction;
 200         f32 camera_fov = m_camera_fov;
 201         m_camera_mutex.Unlock();
 202
 203         /*
 204                 Get all blocks and draw all visible ones
 205         */
 206
 207         v3s16 cam_pos_nodes = floatToInt(camera_position, BS);
 208
 209         v3s16 box_nodes_d = m_control.wanted_range * v3s16(1,1,1);
 210
 211         v3s16 p_nodes_min = cam_pos_nodes - box_nodes_d;
 212         v3s16 p_nodes_max = cam_pos_nodes + box_nodes_d;
 213
 214         // Take a fair amount as we will be dropping more out later
 215         // Umm... these additions are a bit strange but they are needed.
 216         v3s16 p_blocks_min(
 217                         p_nodes_min.X / MAP_BLOCKSIZE - 3,
 218                         p_nodes_min.Y / MAP_BLOCKSIZE - 3,
 219                         p_nodes_min.Z / MAP_BLOCKSIZE - 3);
 220         v3s16 p_blocks_max(
 221                         p_nodes_max.X / MAP_BLOCKSIZE + 1,
 222                         p_nodes_max.Y / MAP_BLOCKSIZE + 1,
 223                         p_nodes_max.Z / MAP_BLOCKSIZE + 1);
 224
 225         u32 vertex_count = 0;
 226         u32 meshbuffer_count = 0;
 227
 228         // For limiting number of mesh animations per frame
 229         u32 mesh_animate_count = 0;
 230         u32 mesh_animate_count_far = 0;
 231
 232         // Number of blocks in rendering range
 233         u32 blocks_in_range = 0;
 234         // Number of blocks occlusion culled
 235         u32 blocks_occlusion_culled = 0;
 236         // Number of blocks in rendering range but don't have a mesh
 237         u32 blocks_in_range_without_mesh = 0;
 238         // Blocks that had mesh that would have been drawn according to
 239         // rendering range (if max blocks limit didn't kick in)
 240         u32 blocks_would_have_drawn = 0;
 241         // Blocks that were drawn and had a mesh
 242         u32 blocks_drawn = 0;
 243         // Blocks which had a corresponding meshbuffer for this pass
 244         u32 blocks_had_pass_meshbuf = 0;
 245         // Blocks from which stuff was actually drawn
 246         u32 blocks_without_stuff = 0;
 247
 248         /*
 249                 Collect a set of blocks for drawing
 250         */
 251
 252         core::map<v3s16, MapBlock*> drawset;
 253
 254         {
 255         ScopeProfiler sp(g_profiler, prefix+"collecting blocks for drawing", SPT_AVG);
 256
 257         for(core::map<v2s16, MapSector*>::Iterator
 258                         si = m_sectors.getIterator();
 259                         si.atEnd() == false; si++)
 260         {
 261                 MapSector *sector = si.getNode()->getValue();
 262                 v2s16 sp = sector->getPos();
 263
 264                 if(m_control.range_all == false)
 265                 {
 266                         if(sp.X < p_blocks_min.X
 267                         || sp.X > p_blocks_max.X
 268                         || sp.Y < p_blocks_min.Z
 269                         || sp.Y > p_blocks_max.Z)
 270                                 continue;
 271                 }
 272
 273                 core::list< MapBlock * > sectorblocks;
 274                 sector->getBlocks(sectorblocks);
 275
 276                 /*
 277                         Loop through blocks in sector
 278                 */
 279
 280                 u32 sector_blocks_drawn = 0;
 281
 282                 core::list< MapBlock * >::Iterator i;
 283                 for(i=sectorblocks.begin(); i!=sectorblocks.end(); i++)
 284                 {
 285                         MapBlock *block = *i;
 286
 287                         /*
 288                                 Compare block position to camera position, skip
 289                                 if not seen on display
 290                         */
 291
 292                         float range = 100000 * BS;
 293                         if(m_control.range_all == false)
 294                                 range = m_control.wanted_range * BS;
 295
 296                         float d = 0.0;
 297                         if(isBlockInSight(block->getPos(), camera_position,
 298                                         camera_direction, camera_fov,
 299                                         range, &d) == false)
 300                         {
 301                                 continue;
 302                         }
 303
 304                         // This is ugly (spherical distance limit?)
 305                         /*if(m_control.range_all == false &&
 306                                         d - 0.5*BS*MAP_BLOCKSIZE > range)
 307                                 continue;*/
 308
 309                         blocks_in_range++;
 310
 311                         /*
 312                                 Ignore if mesh doesn't exist
 313                         */
 314                         {
 315                                 //JMutexAutoLock lock(block->mesh_mutex);
 316
 317                                 if(block->mesh == NULL){
 318                                         blocks_in_range_without_mesh++;
 319                                         continue;
 320                                 }
 321                         }
 322
 323                         /*
 324                                 Occlusion culling
 325                         */
 326
 327                         v3s16 cpn = block->getPos() * MAP_BLOCKSIZE;
 328                         cpn += v3s16(MAP_BLOCKSIZE/2, MAP_BLOCKSIZE/2, MAP_BLOCKSIZE/2);
 329                         float step = BS*1;
 330                         float stepfac = 1.1;
 331                         float startoff = BS*1;
 332                         float endoff = -BS*MAP_BLOCKSIZE*1.42*1.42;
 333                         v3s16 spn = cam_pos_nodes + v3s16(0,0,0);
 334                         s16 bs2 = MAP_BLOCKSIZE/2 + 1;
 335                         u32 needed_count = 1;
 336                         if(
 337                                 isOccluded(this, spn, cpn + v3s16(0,0,0),
 338                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 339                                 isOccluded(this, spn, cpn + v3s16(bs2,bs2,bs2),
 340                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 341                                 isOccluded(this, spn, cpn + v3s16(bs2,bs2,-bs2),
 342                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 343                                 isOccluded(this, spn, cpn + v3s16(bs2,-bs2,bs2),
 344                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 345                                 isOccluded(this, spn, cpn + v3s16(bs2,-bs2,-bs2),
 346                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 347                                 isOccluded(this, spn, cpn + v3s16(-bs2,bs2,bs2),
 348                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 349                                 isOccluded(this, spn, cpn + v3s16(-bs2,bs2,-bs2),
 350                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 351                                 isOccluded(this, spn, cpn + v3s16(-bs2,-bs2,bs2),
 352                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 353                                 isOccluded(this, spn, cpn + v3s16(-bs2,-bs2,-bs2),
 354                                         step, stepfac, startoff, endoff, needed_count, nodemgr)
 355                         )
 356                         {
 357                                 blocks_occlusion_culled++;
 358                                 continue;
 359                         }
 360
 361                         // This block is in range. Reset usage timer.
 362                         block->resetUsageTimer();
 363
 364                         // Limit block count in case of a sudden increase
 365                         blocks_would_have_drawn++;
 366                         if(blocks_drawn >= m_control.wanted_max_blocks
 367                                         && m_control.range_all == false
 368                                         && d > m_control.wanted_min_range * BS)
 369                                 continue;
 370
 371                         // Mesh animation
 372                         {
 373                                 //JMutexAutoLock lock(block->mesh_mutex);
 374                                 MapBlockMesh *mapBlockMesh = block->mesh;
 375                                 // Pretty random but this should work somewhat nicely
 376                                 bool faraway = d >= BS*50;
 377                                 //bool faraway = d >= m_control.wanted_range * BS;
 378                                 if(mapBlockMesh->isAnimationForced() ||
 379                                                 !faraway ||
 380                                                 mesh_animate_count_far < (m_control.range_all ? 200 : 50))
 381                                 {
 382                                         bool animated = mapBlockMesh->animate(
 383                                                         faraway,
 384                                                         animation_time,
 385                                                         crack,
 386                                                         daynight_ratio);
 387                                         if(animated)
 388                                                 mesh_animate_count++;
 389                                         if(animated && faraway)
 390                                                 mesh_animate_count_far++;
 391                                 }
 392                                 else
 393                                 {
 394                                         mapBlockMesh->decreaseAnimationForceTimer();
 395                                 }
 396                         }
 397
 398                         // Add to set
 399                         drawset[block->getPos()] = block;
 400
 401                         sector_blocks_drawn++;
 402                         blocks_drawn++;
 403
 404                 } // foreach sectorblocks
 405
 406                 if(sector_blocks_drawn != 0)
 407                         m_last_drawn_sectors[sp] = true;
 408         }
 409         } // ScopeProfiler
 410
 411         /*
 412                 Draw the selected MapBlocks
 413         */
 414
 415         {
 416         ScopeProfiler sp(g_profiler, prefix+"drawing blocks", SPT_AVG);
 417
 418         int timecheck_counter = 0;
 419         for(core::map<v3s16, MapBlock*>::Iterator
 420                         i = drawset.getIterator();
 421                         i.atEnd() == false; i++)
 422         {
 423                 {
 424                         timecheck_counter++;
 425                         if(timecheck_counter > 50)
 426                         {
 427                                 timecheck_counter = 0;
 428                                 int time2 = time(0);
 429                                 if(time2 > time1 + 4)
 430                                 {
 431                                         infostream<<"ClientMap::renderMap(): "
 432                                                 "Rendering takes ages, returning."
 433                                                 <<std::endl;
 434                                         return;
 435                                 }
 436                         }
 437                 }
 438
 439                 MapBlock *block = i.getNode()->getValue();
 440
 441                 /*
 442                         Draw the faces of the block
 443                 */
 444                 {
 445                         //JMutexAutoLock lock(block->mesh_mutex);
 446
 447                         MapBlockMesh *mapBlockMesh = block->mesh;
 448                         assert(mapBlockMesh);
 449
 450                         scene::SMesh *mesh = mapBlockMesh->getMesh();
 451                         assert(mesh);
 452
 453                         u32 c = mesh->getMeshBufferCount();
 454                         bool stuff_actually_drawn = false;
 455                         for(u32 i=0; i<c; i++)
 456                         {
 457                                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 458                                 const video::SMaterial& material = buf->getMaterial();
 459                                 video::IMaterialRenderer* rnd =
 460                                                 driver->getMaterialRenderer(material.MaterialType);
 461                                 bool transparent = (rnd && rnd->isTransparent());
 462                                 // Render transparent on transparent pass and likewise.
 463                                 if(transparent == is_transparent_pass)
 464                                 {
 465                                         if(buf->getVertexCount() == 0)
 466                                                 errorstream<<"Block ["<<analyze_block(block)
 467                                                                 <<"] contains an empty meshbuf"<<std::endl;
 468                                         /*
 469                                                 This *shouldn't* hurt too much because Irrlicht
 470                                                 doesn't change opengl textures if the old
 471                                                 material has the same texture.
 472                                         */
 473                                         driver->setMaterial(buf->getMaterial());
 474                                         driver->drawMeshBuffer(buf);
 475                                         vertex_count += buf->getVertexCount();
 476                                         meshbuffer_count++;
 477                                         stuff_actually_drawn = true;
 478                                 }
 479                         }
 480                         if(stuff_actually_drawn)
 481                                 blocks_had_pass_meshbuf++;
 482                         else
 483                                 blocks_without_stuff++;
 484                 }
 485         }
 486         } // ScopeProfiler
 487
 488         // Log only on solid pass because values are the same
 489         if(pass == scene::ESNRP_SOLID){
 490                 g_profiler->avg("CM: blocks in range", blocks_in_range);
 491                 g_profiler->avg("CM: blocks occlusion culled", blocks_occlusion_culled);
 492                 if(blocks_in_range != 0)
 493                         g_profiler->avg("CM: blocks in range without mesh (frac)",
 494                                         (float)blocks_in_range_without_mesh/blocks_in_range);
 495                 g_profiler->avg("CM: blocks drawn", blocks_drawn);
 496                 g_profiler->avg("CM: animated meshes", mesh_animate_count);
 497                 g_profiler->avg("CM: animated meshes (far)", mesh_animate_count_far);
 498         }
 499
 500         g_profiler->avg(prefix+"vertices drawn", vertex_count);
 501         if(blocks_had_pass_meshbuf != 0)
 502                 g_profiler->avg(prefix+"meshbuffers per block",
 503                                 (float)meshbuffer_count / (float)blocks_had_pass_meshbuf);
 504         if(blocks_drawn != 0)
 505                 g_profiler->avg(prefix+"empty blocks (frac)",
 506                                 (float)blocks_without_stuff / blocks_drawn);
 507
 508         m_control.blocks_drawn = blocks_drawn;
 509         m_control.blocks_would_have_drawn = blocks_would_have_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                 }
 547         }
 548         for(int i=0; distance < end_distance; i++){
 549                 pf += dir * step;
 550                 distance += step;
 551                 step *= step_multiplier;
 552
 553                 v3s16 p = floatToInt(pf, BS);
 554                 MapNode n = map->getNodeNoEx(p);
 555                 if(allow_allowing_non_sunlight_propagates && i == 0 &&
 556                                 ndef->get(n).param_type == CPT_LIGHT &&
 557                                 !ndef->get(n).sunlight_propagates){
 558                         allow_non_sunlight_propagates = true;
 559                 }
 560                 if(ndef->get(n).param_type != CPT_LIGHT ||
 561                                 (!ndef->get(n).sunlight_propagates &&
 562                                         !allow_non_sunlight_propagates)){
 563                         nonlight_seen = true;
 564                         noncount++;
 565                         if(noncount >= 4)
 566                                 break;
 567                         continue;
 568                 }
 569                 if(distance >= sunlight_min_d && *sunlight_seen == false
 570                                 && nonlight_seen == false)
 571                         if(n.getLight(LIGHTBANK_DAY, ndef) == LIGHT_SUN)
 572                                 *sunlight_seen = true;
 573                 noncount = 0;
 574                 brightness_sum += decode_light(n.getLightBlend(daylight_factor, ndef));
 575                 brightness_count++;
 576         }
 577         *result = 0;
 578         if(brightness_count == 0)
 579                 return false;
 580         *result = brightness_sum / brightness_count;
 581         /*std::cerr<<"Sampled "<<brightness_count<<" points; result="
 582                         <<(*result)<<std::endl;*/
 583         return true;
 584 }
 585
 586 int ClientMap::getBackgroundBrightness(float max_d, u32 daylight_factor,
 587                 int oldvalue, bool *sunlight_seen_result)
 588 {
 589         const bool debugprint = false;
 590         INodeDefManager *ndef = m_gamedef->ndef();
 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(-80, 80),
 601                                 1.0,
 602                                 0.01 * myrand_range(-80, 80)
 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         core::array<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, ndef, 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         values.sort();
 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(ndef->get(n).param_type == CPT_LIGHT){
 669                         ret = decode_light(n.getLightBlend(daylight_factor, ndef));
 670                 } else {
 671                         ret = oldvalue;
 672                         //ret = blend_light(255, 0, daylight_factor);
 673                 }
 674         } else {
 675                 /*float pre = (float)brightness_sum / (float)brightness_count;
 676                 float tmp = pre;
 677                 const float d = 0.2;
 678                 pre *= 1.0 + d*2;
 679                 pre -= tmp * d;
 680                 int preint = pre;
 681                 ret = MYMAX(0, MYMIN(255, preint));*/
 682                 ret = brightness_sum / brightness_count;
 683         }
 684         if(debugprint)
 685                 std::cerr<<"Result: "<<ret<<" sunlight_seen_count="
 686                                 <<sunlight_seen_count<<std::endl;
 687         *sunlight_seen_result = (sunlight_seen_count > 0);
 688         return ret;
 689 }
 690
 691 void ClientMap::renderPostFx()
 692 {
 693         INodeDefManager *nodemgr = m_gamedef->ndef();
 694
 695         // Sadly ISceneManager has no "post effects" render pass, in that case we
 696         // could just register for that and handle it in renderMap().
 697
 698         m_camera_mutex.Lock();
 699         v3f camera_position = m_camera_position;
 700         m_camera_mutex.Unlock();
 701
 702         MapNode n = getNodeNoEx(floatToInt(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         const ContentFeatures& features = nodemgr->get(n);
 707         video::SColor post_effect_color = features.post_effect_color;
 708         if(features.solidness == 2 && g_settings->getBool("free_move") == false)
 709         {
 710                 post_effect_color = video::SColor(255, 0, 0, 0);
 711         }
 712         if (post_effect_color.getAlpha() != 0)
 713         {
 714                 // Draw a full-screen rectangle
 715                 video::IVideoDriver* driver = SceneManager->getVideoDriver();
 716                 v2u32 ss = driver->getScreenSize();
 717                 core::rect<s32> rect(0,0, ss.X, ss.Y);
 718                 driver->draw2DRectangle(post_effect_color, rect);
 719         }
 720 }
 721
 722 void ClientMap::PrintInfo(std::ostream &out)
 723 {
 724         out<<"ClientMap: ";
 725 }
 726
 727