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 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 "main.h" // dout_client, g_settings
  28 #include "nodedef.h"
  29 #include "mapblock.h"
  30 #include "profiler.h"
  31 #include "settings.h"
  32 #include "util/mathconstants.h"
  33
  34 #define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"
  35
  36 ClientMap::ClientMap(
  37                 Client *client,
  38                 IGameDef *gamedef,
  39                 MapDrawControl &control,
  40                 scene::ISceneNode* parent,
  41                 scene::ISceneManager* mgr,
  42                 s32 id
  43 ):
  44         Map(dout_client, gamedef),
  45         scene::ISceneNode(parent, mgr, id),
  46         m_client(client),
  47         m_control(control),
  48         m_camera_position(0,0,0),
  49         m_camera_direction(0,0,1),
  50         m_camera_fov(M_PI)
  51 {
  52         m_camera_mutex.Init();
  53         assert(m_camera_mutex.IsInitialized());
  54
  55         m_box = core::aabbox3d<f32>(-BS*1000000,-BS*1000000,-BS*1000000,
  56                         BS*1000000,BS*1000000,BS*1000000);
  57 }
  58
  59 ClientMap::~ClientMap()
  60 {
  61         /*JMutexAutoLock lock(mesh_mutex);
  62
  63         if(mesh != NULL)
  64         {
  65                 mesh->drop();
  66                 mesh = NULL;
  67         }*/
  68 }
  69
  70 MapSector * ClientMap::emergeSector(v2s16 p2d)
  71 {
  72         DSTACK(__FUNCTION_NAME);
  73         // Check that it doesn't exist already
  74         try{
  75                 return getSectorNoGenerate(p2d);
  76         }
  77         catch(InvalidPositionException &e)
  78         {
  79         }
  80
  81         // Create a sector
  82         ClientMapSector *sector = new ClientMapSector(this, p2d, m_gamedef);
  83
  84         {
  85                 //JMutexAutoLock lock(m_sector_mutex); // Bulk comment-out
  86                 m_sectors.insert(p2d, sector);
  87         }
  88
  89         return sector;
  90 }
  91
  92 #if 0
  93 void ClientMap::deSerializeSector(v2s16 p2d, std::istream &is)
  94 {
  95         DSTACK(__FUNCTION_NAME);
  96         ClientMapSector *sector = NULL;
  97
  98         //JMutexAutoLock lock(m_sector_mutex); // Bulk comment-out
  99
 100         core::map<v2s16, MapSector*>::Node *n = m_sectors.find(p2d);
 101
 102         if(n != NULL)
 103         {
 104                 sector = (ClientMapSector*)n->getValue();
 105                 assert(sector->getId() == MAPSECTOR_CLIENT);
 106         }
 107         else
 108         {
 109                 sector = new ClientMapSector(this, p2d);
 110                 {
 111                         //JMutexAutoLock lock(m_sector_mutex); // Bulk comment-out
 112                         m_sectors.insert(p2d, sector);
 113                 }
 114         }
 115
 116         sector->deSerialize(is);
 117 }
 118 #endif
 119
 120 void ClientMap::OnRegisterSceneNode()
 121 {
 122         if(IsVisible)
 123         {
 124                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
 125                 SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
 126         }
 127
 128         ISceneNode::OnRegisterSceneNode();
 129 }
 130
 131 static bool isOccluded(Map *map, v3s16 p0, v3s16 p1, float step, float stepfac,
 132                 float start_off, float end_off, u32 needed_count, INodeDefManager *nodemgr)
 133 {
 134         float d0 = (float)BS * p0.getDistanceFrom(p1);
 135         v3s16 u0 = p1 - p0;
 136         v3f uf = v3f(u0.X, u0.Y, u0.Z) * BS;
 137         uf.normalize();
 138         v3f p0f = v3f(p0.X, p0.Y, p0.Z) * BS;
 139         u32 count = 0;
 140         for(float s=start_off; s<d0+end_off; s+=step){
 141                 v3f pf = p0f + uf * s;
 142                 v3s16 p = floatToInt(pf, BS);
 143                 MapNode n = map->getNodeNoEx(p);
 144                 bool is_transparent = false;
 145                 const ContentFeatures &f = nodemgr->get(n);
 146                 if(f.solidness == 0)
 147                         is_transparent = (f.visual_solidness != 2);
 148                 else
 149                         is_transparent = (f.solidness != 2);
 150                 if(!is_transparent){
 151                         count++;
 152                         if(count >= needed_count)
 153                                 return true;
 154                 }
 155                 step *= stepfac;
 156         }
 157         return false;
 158 }
 159
 160 void ClientMap::renderMap(video::IVideoDriver* driver, s32 pass)
 161 {
 162         INodeDefManager *nodemgr = m_gamedef->ndef();
 163
 164         //m_dout<<DTIME<<"Rendering map..."<<std::endl;
 165         DSTACK(__FUNCTION_NAME);
 166
 167         bool is_transparent_pass = pass == scene::ESNRP_TRANSPARENT;
 168
 169         std::string prefix;
 170         if(pass == scene::ESNRP_SOLID)
 171                 prefix = "CM: solid: ";
 172         else
 173                 prefix = "CM: transparent: ";
 174
 175         /*
 176                 This is called two times per frame, reset on the non-transparent one
 177         */
 178         if(pass == scene::ESNRP_SOLID)
 179         {
 180                 m_last_drawn_sectors.clear();
 181         }
 182
 183         /*
 184                 Get time for measuring timeout.
 185
 186                 Measuring time is very useful for long delays when the
 187                 machine is swapping a lot.
 188         */
 189         int time1 = time(0);
 190
 191         /*
 192                 Get animation parameters
 193         */
 194         float animation_time = m_client->getAnimationTime();
 195         int crack = m_client->getCrackLevel();
 196         u32 daynight_ratio = m_client->getEnv().getDayNightRatio();
 197
 198         m_camera_mutex.Lock();
 199         v3f camera_position = m_camera_position;
 200         v3f camera_direction = m_camera_direction;
 201         f32 camera_fov = m_camera_fov;
 202         m_camera_mutex.Unlock();
 203
 204         /*
 205                 Get all blocks and draw all visible ones
 206         */
 207
 208         v3s16 cam_pos_nodes = floatToInt(camera_position, BS);
 209
 210         v3s16 box_nodes_d = m_control.wanted_range * v3s16(1,1,1);
 211
 212         v3s16 p_nodes_min = cam_pos_nodes - box_nodes_d;
 213         v3s16 p_nodes_max = cam_pos_nodes + box_nodes_d;
 214
 215         // Take a fair amount as we will be dropping more out later
 216         // Umm... these additions are a bit strange but they are needed.
 217         v3s16 p_blocks_min(
 218                         p_nodes_min.X / MAP_BLOCKSIZE - 3,
 219                         p_nodes_min.Y / MAP_BLOCKSIZE - 3,
 220                         p_nodes_min.Z / MAP_BLOCKSIZE - 3);
 221         v3s16 p_blocks_max(
 222                         p_nodes_max.X / MAP_BLOCKSIZE + 1,
 223                         p_nodes_max.Y / MAP_BLOCKSIZE + 1,
 224                         p_nodes_max.Z / MAP_BLOCKSIZE + 1);
 225
 226         u32 vertex_count = 0;
 227         u32 meshbuffer_count = 0;
 228
 229         // For limiting number of mesh animations per frame
 230         u32 mesh_animate_count = 0;
 231         u32 mesh_animate_count_far = 0;
 232
 233         // Number of blocks in rendering range
 234         u32 blocks_in_range = 0;
 235         // Number of blocks occlusion culled
 236         u32 blocks_occlusion_culled = 0;
 237         // Number of blocks in rendering range but don't have a mesh
 238         u32 blocks_in_range_without_mesh = 0;
 239         // Blocks that had mesh that would have been drawn according to
 240         // rendering range (if max blocks limit didn't kick in)
 241         u32 blocks_would_have_drawn = 0;
 242         // Blocks that were drawn and had a mesh
 243         u32 blocks_drawn = 0;
 244         // Blocks which had a corresponding meshbuffer for this pass
 245         u32 blocks_had_pass_meshbuf = 0;
 246         // Blocks from which stuff was actually drawn
 247         u32 blocks_without_stuff = 0;
 248
 249         /*
 250                 Collect a set of blocks for drawing
 251         */
 252
 253         core::map<v3s16, MapBlock*> drawset;
 254
 255         {
 256         ScopeProfiler sp(g_profiler, prefix+"collecting blocks for drawing", SPT_AVG);
 257
 258         for(core::map<v2s16, MapSector*>::Iterator
 259                         si = m_sectors.getIterator();
 260                         si.atEnd() == false; si++)
 261         {
 262                 MapSector *sector = si.getNode()->getValue();
 263                 v2s16 sp = sector->getPos();
 264
 265                 if(m_control.range_all == false)
 266                 {
 267                         if(sp.X < p_blocks_min.X
 268                         || sp.X > p_blocks_max.X
 269                         || sp.Y < p_blocks_min.Z
 270                         || sp.Y > p_blocks_max.Z)
 271                                 continue;
 272                 }
 273
 274                 core::list< MapBlock * > sectorblocks;
 275                 sector->getBlocks(sectorblocks);
 276
 277                 /*
 278                         Loop through blocks in sector
 279                 */
 280
 281                 u32 sector_blocks_drawn = 0;
 282
 283                 core::list< MapBlock * >::Iterator i;
 284                 for(i=sectorblocks.begin(); i!=sectorblocks.end(); i++)
 285                 {
 286                         MapBlock *block = *i;
 287
 288                         /*
 289                                 Compare block position to camera position, skip
 290                                 if not seen on display
 291                         */
 292
 293                         float range = 100000 * BS;
 294                         if(m_control.range_all == false)
 295                                 range = m_control.wanted_range * BS;
 296
 297                         float d = 0.0;
 298                         if(isBlockInSight(block->getPos(), camera_position,
 299                                         camera_direction, camera_fov,
 300                                         range, &d) == false)
 301                         {
 302                                 continue;
 303                         }
 304
 305                         // This is ugly (spherical distance limit?)
 306                         /*if(m_control.range_all == false &&
 307                                         d - 0.5*BS*MAP_BLOCKSIZE > range)
 308                                 continue;*/
 309
 310                         blocks_in_range++;
 311
 312                         /*
 313                                 Ignore if mesh doesn't exist
 314                         */
 315                         {
 316                                 //JMutexAutoLock lock(block->mesh_mutex);
 317
 318                                 if(block->mesh == NULL){
 319                                         blocks_in_range_without_mesh++;
 320                                         continue;
 321                                 }
 322                         }
 323
 324                         /*
 325                                 Occlusion culling
 326                         */
 327
 328                         // No occlusion culling when free_move is on and camera is
 329                         // inside ground
 330                         bool occlusion_culling_enabled = true;
 331                         if(g_settings->getBool("free_move")){
 332                                 MapNode n = getNodeNoEx(cam_pos_nodes);
 333                                 if(n.getContent() == CONTENT_IGNORE ||
 334                                                 nodemgr->get(n).solidness == 2)
 335                                         occlusion_culling_enabled = false;
 336                         }
 337
 338                         v3s16 cpn = block->getPos() * MAP_BLOCKSIZE;
 339                         cpn += v3s16(MAP_BLOCKSIZE/2, MAP_BLOCKSIZE/2, MAP_BLOCKSIZE/2);
 340                         float step = BS*1;
 341                         float stepfac = 1.1;
 342                         float startoff = BS*1;
 343                         float endoff = -BS*MAP_BLOCKSIZE*1.42*1.42;
 344                         v3s16 spn = cam_pos_nodes + v3s16(0,0,0);
 345                         s16 bs2 = MAP_BLOCKSIZE/2 + 1;
 346                         u32 needed_count = 1;
 347                         if(
 348                                 occlusion_culling_enabled &&
 349                                 isOccluded(this, spn, cpn + v3s16(0,0,0),
 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                                 isOccluded(this, spn, cpn + v3s16(bs2,-bs2,bs2),
 356                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 357                                 isOccluded(this, spn, cpn + v3s16(bs2,-bs2,-bs2),
 358                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 359                                 isOccluded(this, spn, cpn + v3s16(-bs2,bs2,bs2),
 360                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 361                                 isOccluded(this, spn, cpn + v3s16(-bs2,bs2,-bs2),
 362                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 363                                 isOccluded(this, spn, cpn + v3s16(-bs2,-bs2,bs2),
 364                                         step, stepfac, startoff, endoff, needed_count, nodemgr) &&
 365                                 isOccluded(this, spn, cpn + v3s16(-bs2,-bs2,-bs2),
 366                                         step, stepfac, startoff, endoff, needed_count, nodemgr)
 367                         )
 368                         {
 369                                 blocks_occlusion_culled++;
 370                                 continue;
 371                         }
 372
 373                         // This block is in range. Reset usage timer.
 374                         block->resetUsageTimer();
 375
 376                         // Limit block count in case of a sudden increase
 377                         blocks_would_have_drawn++;
 378                         if(blocks_drawn >= m_control.wanted_max_blocks
 379                                         && m_control.range_all == false
 380                                         && d > m_control.wanted_min_range * BS)
 381                                 continue;
 382
 383                         // Mesh animation
 384                         {
 385                                 //JMutexAutoLock lock(block->mesh_mutex);
 386                                 MapBlockMesh *mapBlockMesh = block->mesh;
 387                                 // Pretty random but this should work somewhat nicely
 388                                 bool faraway = d >= BS*50;
 389                                 //bool faraway = d >= m_control.wanted_range * BS;
 390                                 if(mapBlockMesh->isAnimationForced() ||
 391                                                 !faraway ||
 392                                                 mesh_animate_count_far < (m_control.range_all ? 200 : 50))
 393                                 {
 394                                         bool animated = mapBlockMesh->animate(
 395                                                         faraway,
 396                                                         animation_time,
 397                                                         crack,
 398                                                         daynight_ratio);
 399                                         if(animated)
 400                                                 mesh_animate_count++;
 401                                         if(animated && faraway)
 402                                                 mesh_animate_count_far++;
 403                                 }
 404                                 else
 405                                 {
 406                                         mapBlockMesh->decreaseAnimationForceTimer();
 407                                 }
 408                         }
 409
 410                         // Add to set
 411                         drawset[block->getPos()] = block;
 412
 413                         sector_blocks_drawn++;
 414                         blocks_drawn++;
 415
 416                 } // foreach sectorblocks
 417
 418                 if(sector_blocks_drawn != 0)
 419                         m_last_drawn_sectors[sp] = true;
 420         }
 421         } // ScopeProfiler
 422
 423         /*
 424                 Draw the selected MapBlocks
 425         */
 426
 427         {
 428         ScopeProfiler sp(g_profiler, prefix+"drawing blocks", SPT_AVG);
 429
 430         int timecheck_counter = 0;
 431         for(core::map<v3s16, MapBlock*>::Iterator
 432                         i = drawset.getIterator();
 433                         i.atEnd() == false; i++)
 434         {
 435                 {
 436                         timecheck_counter++;
 437                         if(timecheck_counter > 50)
 438                         {
 439                                 timecheck_counter = 0;
 440                                 int time2 = time(0);
 441                                 if(time2 > time1 + 4)
 442                                 {
 443                                         infostream<<"ClientMap::renderMap(): "
 444                                                 "Rendering takes ages, returning."
 445                                                 <<std::endl;
 446                                         return;
 447                                 }
 448                         }
 449                 }
 450
 451                 MapBlock *block = i.getNode()->getValue();
 452
 453                 /*
 454                         Draw the faces of the block
 455                 */
 456                 {
 457                         //JMutexAutoLock lock(block->mesh_mutex);
 458
 459                         MapBlockMesh *mapBlockMesh = block->mesh;
 460                         assert(mapBlockMesh);
 461
 462                         scene::SMesh *mesh = mapBlockMesh->getMesh();
 463                         assert(mesh);
 464
 465                         u32 c = mesh->getMeshBufferCount();
 466                         bool stuff_actually_drawn = false;
 467                         for(u32 i=0; i<c; i++)
 468                         {
 469                                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 470                                 const video::SMaterial& material = buf->getMaterial();
 471                                 video::IMaterialRenderer* rnd =
 472                                                 driver->getMaterialRenderer(material.MaterialType);
 473                                 bool transparent = (rnd && rnd->isTransparent());
 474                                 // Render transparent on transparent pass and likewise.
 475                                 if(transparent == is_transparent_pass)
 476                                 {
 477                                         if(buf->getVertexCount() == 0)
 478                                                 errorstream<<"Block ["<<analyze_block(block)
 479                                                                 <<"] contains an empty meshbuf"<<std::endl;
 480                                         /*
 481                                                 This *shouldn't* hurt too much because Irrlicht
 482                                                 doesn't change opengl textures if the old
 483                                                 material has the same texture.
 484                                         */
 485                                         driver->setMaterial(buf->getMaterial());
 486                                         driver->drawMeshBuffer(buf);
 487                                         vertex_count += buf->getVertexCount();
 488                                         meshbuffer_count++;
 489                                         stuff_actually_drawn = true;
 490                                 }
 491                         }
 492                         if(stuff_actually_drawn)
 493                                 blocks_had_pass_meshbuf++;
 494                         else
 495                                 blocks_without_stuff++;
 496                 }
 497         }
 498         } // ScopeProfiler
 499
 500         // Log only on solid pass because values are the same
 501         if(pass == scene::ESNRP_SOLID){
 502                 g_profiler->avg("CM: blocks in range", blocks_in_range);
 503                 g_profiler->avg("CM: blocks occlusion culled", blocks_occlusion_culled);
 504                 if(blocks_in_range != 0)
 505                         g_profiler->avg("CM: blocks in range without mesh (frac)",
 506                                         (float)blocks_in_range_without_mesh/blocks_in_range);
 507                 g_profiler->avg("CM: blocks drawn", blocks_drawn);
 508                 g_profiler->avg("CM: animated meshes", mesh_animate_count);
 509                 g_profiler->avg("CM: animated meshes (far)", mesh_animate_count_far);
 510         }
 511
 512         g_profiler->avg(prefix+"vertices drawn", vertex_count);
 513         if(blocks_had_pass_meshbuf != 0)
 514                 g_profiler->avg(prefix+"meshbuffers per block",
 515                                 (float)meshbuffer_count / (float)blocks_had_pass_meshbuf);
 516         if(blocks_drawn != 0)
 517                 g_profiler->avg(prefix+"empty blocks (frac)",
 518                                 (float)blocks_without_stuff / blocks_drawn);
 519
 520         m_control.blocks_drawn = blocks_drawn;
 521         m_control.blocks_would_have_drawn = blocks_would_have_drawn;
 522
 523         /*infostream<<"renderMap(): is_transparent_pass="<<is_transparent_pass
 524                         <<", rendered "<<vertex_count<<" vertices."<<std::endl;*/
 525 }
 526
 527 static bool getVisibleBrightness(Map *map, v3f p0, v3f dir, float step,
 528                 float step_multiplier, float start_distance, float end_distance,
 529                 INodeDefManager *ndef, u32 daylight_factor, float sunlight_min_d,
 530                 int *result, bool *sunlight_seen)
 531 {
 532         int brightness_sum = 0;
 533         int brightness_count = 0;
 534         float distance = start_distance;
 535         dir.normalize();
 536         v3f pf = p0;
 537         pf += dir * distance;
 538         int noncount = 0;
 539         bool nonlight_seen = false;
 540         bool allow_allowing_non_sunlight_propagates = false;
 541         bool allow_non_sunlight_propagates = false;
 542         // Check content nearly at camera position
 543         {
 544                 v3s16 p = floatToInt(p0 /*+ dir * 3*BS*/, BS);
 545                 MapNode n = map->getNodeNoEx(p);
 546                 if(ndef->get(n).param_type == CPT_LIGHT &&
 547                                 !ndef->get(n).sunlight_propagates)
 548                         allow_allowing_non_sunlight_propagates = true;
 549         }
 550         // If would start at CONTENT_IGNORE, start closer
 551         {
 552                 v3s16 p = floatToInt(pf, BS);
 553                 MapNode n = map->getNodeNoEx(p);
 554                 if(n.getContent() == CONTENT_IGNORE){
 555                         float newd = 2*BS;
 556                         pf = p0 + dir * 2*newd;
 557                         distance = newd;
 558                         sunlight_min_d = 0;
 559                 }
 560         }
 561         for(int i=0; distance < end_distance; i++){
 562                 pf += dir * step;
 563                 distance += step;
 564                 step *= step_multiplier;
 565
 566                 v3s16 p = floatToInt(pf, BS);
 567                 MapNode n = map->getNodeNoEx(p);
 568                 if(allow_allowing_non_sunlight_propagates && i == 0 &&
 569                                 ndef->get(n).param_type == CPT_LIGHT &&
 570                                 !ndef->get(n).sunlight_propagates){
 571                         allow_non_sunlight_propagates = true;
 572                 }
 573                 if(ndef->get(n).param_type != CPT_LIGHT ||
 574                                 (!ndef->get(n).sunlight_propagates &&
 575                                         !allow_non_sunlight_propagates)){
 576                         nonlight_seen = true;
 577                         noncount++;
 578                         if(noncount >= 4)
 579                                 break;
 580                         continue;
 581                 }
 582                 if(distance >= sunlight_min_d && *sunlight_seen == false
 583                                 && nonlight_seen == false)
 584                         if(n.getLight(LIGHTBANK_DAY, ndef) == LIGHT_SUN)
 585                                 *sunlight_seen = true;
 586                 noncount = 0;
 587                 brightness_sum += decode_light(n.getLightBlend(daylight_factor, ndef));
 588                 brightness_count++;
 589         }
 590         *result = 0;
 591         if(brightness_count == 0)
 592                 return false;
 593         *result = brightness_sum / brightness_count;
 594         /*std::cerr<<"Sampled "<<brightness_count<<" points; result="
 595                         <<(*result)<<std::endl;*/
 596         return true;
 597 }
 598
 599 int ClientMap::getBackgroundBrightness(float max_d, u32 daylight_factor,
 600                 int oldvalue, bool *sunlight_seen_result)
 601 {
 602         const bool debugprint = false;
 603         INodeDefManager *ndef = m_gamedef->ndef();
 604         static v3f z_directions[50] = {
 605                 v3f(-100, 0, 0)
 606         };
 607         static f32 z_offsets[sizeof(z_directions)/sizeof(*z_directions)] = {
 608                 -1000,
 609         };
 610         if(z_directions[0].X < -99){
 611                 for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 612                         z_directions[i] = v3f(
 613                                 0.01 * myrand_range(-100, 100),
 614                                 1.0,
 615                                 0.01 * myrand_range(-100, 100)
 616                         );
 617                         z_offsets[i] = 0.01 * myrand_range(0,100);
 618                 }
 619         }
 620         if(debugprint)
 621                 std::cerr<<"In goes "<<PP(m_camera_direction)<<", out comes ";
 622         int sunlight_seen_count = 0;
 623         float sunlight_min_d = max_d*0.8;
 624         if(sunlight_min_d > 35*BS)
 625                 sunlight_min_d = 35*BS;
 626         core::array<int> values;
 627         for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 628                 v3f z_dir = z_directions[i];
 629                 z_dir.normalize();
 630                 core::CMatrix4<f32> a;
 631                 a.buildRotateFromTo(v3f(0,1,0), z_dir);
 632                 v3f dir = m_camera_direction;
 633                 a.rotateVect(dir);
 634                 int br = 0;
 635                 float step = BS*1.5;
 636                 if(max_d > 35*BS)
 637                         step = max_d / 35 * 1.5;
 638                 float off = step * z_offsets[i];
 639                 bool sunlight_seen_now = false;
 640                 bool ok = getVisibleBrightness(this, m_camera_position, dir,
 641                                 step, 1.0, max_d*0.6+off, max_d, ndef, daylight_factor,
 642                                 sunlight_min_d,
 643                                 &br, &sunlight_seen_now);
 644                 if(sunlight_seen_now)
 645                         sunlight_seen_count++;
 646                 if(!ok)
 647                         continue;
 648                 values.push_back(br);
 649                 // Don't try too much if being in the sun is clear
 650                 if(sunlight_seen_count >= 20)
 651                         break;
 652         }
 653         int brightness_sum = 0;
 654         int brightness_count = 0;
 655         values.sort();
 656         u32 num_values_to_use = values.size();
 657         if(num_values_to_use >= 10)
 658                 num_values_to_use -= num_values_to_use/2;
 659         else if(num_values_to_use >= 7)
 660                 num_values_to_use -= num_values_to_use/3;
 661         u32 first_value_i = (values.size() - num_values_to_use) / 2;
 662         if(debugprint){
 663                 for(u32 i=0; i < first_value_i; i++)
 664                         std::cerr<<values[i]<<" ";
 665                 std::cerr<<"[";
 666         }
 667         for(u32 i=first_value_i; i < first_value_i+num_values_to_use; i++){
 668                 if(debugprint)
 669                         std::cerr<<values[i]<<" ";
 670                 brightness_sum += values[i];
 671                 brightness_count++;
 672         }
 673         if(debugprint){
 674                 std::cerr<<"]";
 675                 for(u32 i=first_value_i+num_values_to_use; i < values.size(); i++)
 676                         std::cerr<<values[i]<<" ";
 677         }
 678         int ret = 0;
 679         if(brightness_count == 0){
 680                 MapNode n = getNodeNoEx(floatToInt(m_camera_position, BS));
 681                 if(ndef->get(n).param_type == CPT_LIGHT){
 682                         ret = decode_light(n.getLightBlend(daylight_factor, ndef));
 683                 } else {
 684                         ret = oldvalue;
 685                         //ret = blend_light(255, 0, daylight_factor);
 686                 }
 687         } else {
 688                 /*float pre = (float)brightness_sum / (float)brightness_count;
 689                 float tmp = pre;
 690                 const float d = 0.2;
 691                 pre *= 1.0 + d*2;
 692                 pre -= tmp * d;
 693                 int preint = pre;
 694                 ret = MYMAX(0, MYMIN(255, preint));*/
 695                 ret = brightness_sum / brightness_count;
 696         }
 697         if(debugprint)
 698                 std::cerr<<"Result: "<<ret<<" sunlight_seen_count="
 699                                 <<sunlight_seen_count<<std::endl;
 700         *sunlight_seen_result = (sunlight_seen_count > 0);
 701         return ret;
 702 }
 703
 704 void ClientMap::renderPostFx()
 705 {
 706         INodeDefManager *nodemgr = m_gamedef->ndef();
 707
 708         // Sadly ISceneManager has no "post effects" render pass, in that case we
 709         // could just register for that and handle it in renderMap().
 710
 711         m_camera_mutex.Lock();
 712         v3f camera_position = m_camera_position;
 713         m_camera_mutex.Unlock();
 714
 715         MapNode n = getNodeNoEx(floatToInt(camera_position, BS));
 716
 717         // - If the player is in a solid node, make everything black.
 718         // - If the player is in liquid, draw a semi-transparent overlay.
 719         const ContentFeatures& features = nodemgr->get(n);
 720         video::SColor post_effect_color = features.post_effect_color;
 721         if(features.solidness == 2 && g_settings->getBool("free_move") == false)
 722         {
 723                 post_effect_color = video::SColor(255, 0, 0, 0);
 724         }
 725         if (post_effect_color.getAlpha() != 0)
 726         {
 727                 // Draw a full-screen rectangle
 728                 video::IVideoDriver* driver = SceneManager->getVideoDriver();
 729                 v2u32 ss = driver->getScreenSize();
 730                 core::rect<s32> rect(0,0, ss.X, ss.Y);
 731                 driver->draw2DRectangle(post_effect_color, rect);
 732         }
 733 }
 734
 735 void ClientMap::PrintInfo(std::ostream &out)
 736 {
 737         out<<"ClientMap: ";
 738 }
 739
 740