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 "mapsector.h"
  26 #include "mapblock.h"
  27 #include "profiler.h"
  28 #include "settings.h"
  29 #include "camera.h"               // CameraModes
  30 #include "util/basic_macros.h"
  31 #include <algorithm>
  32 #include "client/renderingengine.h"
  33
  34 ClientMap::ClientMap(
  35                 Client *client,
  36                 MapDrawControl &control,
  37                 s32 id
  38 ):
  39         Map(dout_client, client),
  40         scene::ISceneNode(RenderingEngine::get_scene_manager()->getRootSceneNode(),
  41                 RenderingEngine::get_scene_manager(), id),
  42         m_client(client),
  43         m_control(control)
  44 {
  45         m_box = aabb3f(-BS*1000000,-BS*1000000,-BS*1000000,
  46                         BS*1000000,BS*1000000,BS*1000000);
  47
  48         /* TODO: Add a callback function so these can be updated when a setting
  49          *       changes.  At this point in time it doesn't matter (e.g. /set
  50          *       is documented to change server settings only)
  51          *
  52          * TODO: Local caching of settings is not optimal and should at some stage
  53          *       be updated to use a global settings object for getting thse values
  54          *       (as opposed to the this local caching). This can be addressed in
  55          *       a later release.
  56          */
  57         m_cache_trilinear_filter  = g_settings->getBool("trilinear_filter");
  58         m_cache_bilinear_filter   = g_settings->getBool("bilinear_filter");
  59         m_cache_anistropic_filter = g_settings->getBool("anisotropic_filter");
  60
  61 }
  62
  63 MapSector * ClientMap::emergeSector(v2s16 p2d)
  64 {
  65         DSTACK(FUNCTION_NAME);
  66         // Check that it doesn't exist already
  67         try{
  68                 return getSectorNoGenerate(p2d);
  69         }
  70         catch(InvalidPositionException &e)
  71         {
  72         }
  73
  74         // Create a sector
  75         ClientMapSector *sector = new ClientMapSector(this, p2d, m_gamedef);
  76
  77         {
  78                 //MutexAutoLock lock(m_sector_mutex); // Bulk comment-out
  79                 m_sectors[p2d] = sector;
  80         }
  81
  82         return sector;
  83 }
  84
  85 void ClientMap::OnRegisterSceneNode()
  86 {
  87         if(IsVisible)
  88         {
  89                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
  90                 SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
  91         }
  92
  93         ISceneNode::OnRegisterSceneNode();
  94 }
  95
  96 void ClientMap::getBlocksInViewRange(v3s16 cam_pos_nodes,
  97                 v3s16 *p_blocks_min, v3s16 *p_blocks_max)
  98 {
  99         v3s16 box_nodes_d = m_control.wanted_range * v3s16(1, 1, 1);
 100         // Define p_nodes_min/max as v3s32 because 'cam_pos_nodes -/+ box_nodes_d'
 101         // can exceed the range of v3s16 when a large view range is used near the
 102         // world edges.
 103         v3s32 p_nodes_min(
 104                 cam_pos_nodes.X - box_nodes_d.X,
 105                 cam_pos_nodes.Y - box_nodes_d.Y,
 106                 cam_pos_nodes.Z - box_nodes_d.Z);
 107         v3s32 p_nodes_max(
 108                 cam_pos_nodes.X + box_nodes_d.X,
 109                 cam_pos_nodes.Y + box_nodes_d.Y,
 110                 cam_pos_nodes.Z + box_nodes_d.Z);
 111         // Take a fair amount as we will be dropping more out later
 112         // Umm... these additions are a bit strange but they are needed.
 113         *p_blocks_min = v3s16(
 114                         p_nodes_min.X / MAP_BLOCKSIZE - 3,
 115                         p_nodes_min.Y / MAP_BLOCKSIZE - 3,
 116                         p_nodes_min.Z / MAP_BLOCKSIZE - 3);
 117         *p_blocks_max = v3s16(
 118                         p_nodes_max.X / MAP_BLOCKSIZE + 1,
 119                         p_nodes_max.Y / MAP_BLOCKSIZE + 1,
 120                         p_nodes_max.Z / MAP_BLOCKSIZE + 1);
 121 }
 122
 123 void ClientMap::updateDrawList()
 124 {
 125         ScopeProfiler sp(g_profiler, "CM::updateDrawList()", SPT_AVG);
 126         g_profiler->add("CM::updateDrawList() count", 1);
 127
 128         for (auto &i : m_drawlist) {
 129                 MapBlock *block = i.second;
 130                 block->refDrop();
 131         }
 132         m_drawlist.clear();
 133
 134         v3f camera_position = m_camera_position;
 135         v3f camera_direction = m_camera_direction;
 136         f32 camera_fov = m_camera_fov;
 137
 138         // Use a higher fov to accomodate faster camera movements.
 139         // Blocks are cropped better when they are drawn.
 140         // Or maybe they aren't? Well whatever.
 141         camera_fov *= 1.2;
 142
 143         v3s16 cam_pos_nodes = floatToInt(camera_position, BS);
 144         v3s16 p_blocks_min;
 145         v3s16 p_blocks_max;
 146         getBlocksInViewRange(cam_pos_nodes, &p_blocks_min, &p_blocks_max);
 147
 148         // Number of blocks in rendering range
 149         u32 blocks_in_range = 0;
 150         // Number of blocks occlusion culled
 151         u32 blocks_occlusion_culled = 0;
 152         // Number of blocks in rendering range but don't have a mesh
 153         u32 blocks_in_range_without_mesh = 0;
 154         // Blocks that had mesh that would have been drawn according to
 155         // rendering range (if max blocks limit didn't kick in)
 156         u32 blocks_would_have_drawn = 0;
 157         // Blocks that were drawn and had a mesh
 158         u32 blocks_drawn = 0;
 159         // Blocks which had a corresponding meshbuffer for this pass
 160         //u32 blocks_had_pass_meshbuf = 0;
 161         // Blocks from which stuff was actually drawn
 162         //u32 blocks_without_stuff = 0;
 163         // Distance to farthest drawn block
 164         float farthest_drawn = 0;
 165
 166         // No occlusion culling when free_move is on and camera is
 167         // inside ground
 168         bool occlusion_culling_enabled = true;
 169         if (g_settings->getBool("free_move")) {
 170                 MapNode n = getNodeNoEx(cam_pos_nodes);
 171                 if (n.getContent() == CONTENT_IGNORE ||
 172                                 m_nodedef->get(n).solidness == 2)
 173                         occlusion_culling_enabled = false;
 174         }
 175
 176         for (const auto &sector_it : m_sectors) {
 177                 MapSector *sector = sector_it.second;
 178                 v2s16 sp = sector->getPos();
 179
 180                 if (!m_control.range_all) {
 181                         if (sp.X < p_blocks_min.X || sp.X > p_blocks_max.X ||
 182                                         sp.Y < p_blocks_min.Z || sp.Y > p_blocks_max.Z)
 183                                 continue;
 184                 }
 185
 186                 MapBlockVect sectorblocks;
 187                 sector->getBlocks(sectorblocks);
 188
 189                 /*
 190                         Loop through blocks in sector
 191                 */
 192
 193                 u32 sector_blocks_drawn = 0;
 194
 195                 for (auto block : sectorblocks) {
 196                         /*
 197                         Compare block position to camera position, skip
 198                         if not seen on display
 199                 */
 200
 201                         if (block->mesh)
 202                                 block->mesh->updateCameraOffset(m_camera_offset);
 203
 204                         float range = 100000 * BS;
 205                         if (!m_control.range_all)
 206                                 range = m_control.wanted_range * BS;
 207
 208                         float d = 0.0;
 209                         if (!isBlockInSight(block->getPos(), camera_position,
 210                                         camera_direction, camera_fov, range, &d))
 211                                 continue;
 212
 213                         blocks_in_range++;
 214
 215                         /*
 216                                 Ignore if mesh doesn't exist
 217                         */
 218                         if (!block->mesh) {
 219                                 blocks_in_range_without_mesh++;
 220                                 continue;
 221                         }
 222
 223                         /*
 224                                 Occlusion culling
 225                         */
 226                         if (occlusion_culling_enabled && isBlockOccluded(block, cam_pos_nodes)) {
 227                                 blocks_occlusion_culled++;
 228                                 continue;
 229                         }
 230
 231                         // This block is in range. Reset usage timer.
 232                         block->resetUsageTimer();
 233
 234                         // Limit block count in case of a sudden increase
 235                         blocks_would_have_drawn++;
 236                         if (blocks_drawn >= m_control.wanted_max_blocks &&
 237                                         !m_control.range_all &&
 238                                         d > m_control.wanted_range * BS)
 239                                 continue;
 240
 241                         // Add to set
 242                         block->refGrab();
 243                         m_drawlist[block->getPos()] = block;
 244
 245                         sector_blocks_drawn++;
 246                         blocks_drawn++;
 247                         if (d / BS > farthest_drawn)
 248                                 farthest_drawn = d / BS;
 249
 250                 } // foreach sectorblocks
 251
 252                 if (sector_blocks_drawn != 0)
 253                         m_last_drawn_sectors.insert(sp);
 254         }
 255
 256         g_profiler->avg("CM: blocks in range", blocks_in_range);
 257         g_profiler->avg("CM: blocks occlusion culled", blocks_occlusion_culled);
 258         if (blocks_in_range != 0)
 259                 g_profiler->avg("CM: blocks in range without mesh (frac)",
 260                                 (float)blocks_in_range_without_mesh / blocks_in_range);
 261         g_profiler->avg("CM: blocks drawn", blocks_drawn);
 262         g_profiler->avg("CM: farthest drawn", farthest_drawn);
 263         g_profiler->avg("CM: wanted max blocks", m_control.wanted_max_blocks);
 264 }
 265
 266 struct MeshBufList
 267 {
 268         video::SMaterial m;
 269         std::vector<scene::IMeshBuffer*> bufs;
 270 };
 271
 272 struct MeshBufListList
 273 {
 274         /*!
 275          * Stores the mesh buffers of the world.
 276          * The array index is the material's layer.
 277          * The vector part groups vertices by material.
 278          */
 279         std::vector<MeshBufList> lists[MAX_TILE_LAYERS];
 280
 281         void clear()
 282         {
 283                 for (int l = 0; l < MAX_TILE_LAYERS; l++)
 284                         lists[l].clear();
 285         }
 286
 287         void add(scene::IMeshBuffer *buf, u8 layer)
 288         {
 289                 // Append to the correct layer
 290                 std::vector<MeshBufList> &list = lists[layer];
 291                 const video::SMaterial &m = buf->getMaterial();
 292                 for (MeshBufList &l : list) {
 293                         // comparing a full material is quite expensive so we don't do it if
 294                         // not even first texture is equal
 295                         if (l.m.TextureLayer[0].Texture != m.TextureLayer[0].Texture)
 296                                 continue;
 297
 298                         if (l.m == m) {
 299                                 l.bufs.push_back(buf);
 300                                 return;
 301                         }
 302                 }
 303                 MeshBufList l;
 304                 l.m = m;
 305                 l.bufs.push_back(buf);
 306                 list.push_back(l);
 307         }
 308 };
 309
 310 void ClientMap::renderMap(video::IVideoDriver* driver, s32 pass)
 311 {
 312         DSTACK(FUNCTION_NAME);
 313
 314         bool is_transparent_pass = pass == scene::ESNRP_TRANSPARENT;
 315
 316         std::string prefix;
 317         if (pass == scene::ESNRP_SOLID)
 318                 prefix = "CM: solid: ";
 319         else
 320                 prefix = "CM: transparent: ";
 321
 322         /*
 323                 This is called two times per frame, reset on the non-transparent one
 324         */
 325         if (pass == scene::ESNRP_SOLID)
 326                 m_last_drawn_sectors.clear();
 327
 328         /*
 329                 Get time for measuring timeout.
 330
 331                 Measuring time is very useful for long delays when the
 332                 machine is swapping a lot.
 333         */
 334         std::time_t time1 = time(0);
 335
 336         /*
 337                 Get animation parameters
 338         */
 339         float animation_time = m_client->getAnimationTime();
 340         int crack = m_client->getCrackLevel();
 341         u32 daynight_ratio = m_client->getEnv().getDayNightRatio();
 342
 343         v3f camera_position = m_camera_position;
 344         v3f camera_direction = m_camera_direction;
 345         f32 camera_fov = m_camera_fov;
 346
 347         /*
 348                 Get all blocks and draw all visible ones
 349         */
 350
 351         u32 vertex_count = 0;
 352         u32 meshbuffer_count = 0;
 353
 354         // For limiting number of mesh animations per frame
 355         u32 mesh_animate_count = 0;
 356         u32 mesh_animate_count_far = 0;
 357
 358         // Blocks that were drawn and had a mesh
 359         u32 blocks_drawn = 0;
 360         // Blocks which had a corresponding meshbuffer for this pass
 361         u32 blocks_had_pass_meshbuf = 0;
 362         // Blocks from which stuff was actually drawn
 363         u32 blocks_without_stuff = 0;
 364
 365         /*
 366                 Draw the selected MapBlocks
 367         */
 368
 369         {
 370         ScopeProfiler sp(g_profiler, prefix + "drawing blocks", SPT_AVG);
 371
 372         MeshBufListList drawbufs;
 373
 374         for (auto &i : m_drawlist) {
 375                 MapBlock *block = i.second;
 376
 377                 // If the mesh of the block happened to get deleted, ignore it
 378                 if (!block->mesh)
 379                         continue;
 380
 381                 float d = 0.0;
 382                 if (!isBlockInSight(block->getPos(), camera_position,
 383                                 camera_direction, camera_fov, 100000 * BS, &d))
 384                         continue;
 385
 386                 // Mesh animation
 387                 if (pass == scene::ESNRP_SOLID) {
 388                         //MutexAutoLock lock(block->mesh_mutex);
 389                         MapBlockMesh *mapBlockMesh = block->mesh;
 390                         assert(mapBlockMesh);
 391                         // Pretty random but this should work somewhat nicely
 392                         bool faraway = d >= BS * 50;
 393                         //bool faraway = d >= m_control.wanted_range * BS;
 394                         if (mapBlockMesh->isAnimationForced() || !faraway ||
 395                                         mesh_animate_count_far < (m_control.range_all ? 200 : 50)) {
 396                                 bool animated = mapBlockMesh->animate(faraway, animation_time,
 397                                         crack, daynight_ratio);
 398                                 if (animated)
 399                                         mesh_animate_count++;
 400                                 if (animated && faraway)
 401                                         mesh_animate_count_far++;
 402                         } else {
 403                                 mapBlockMesh->decreaseAnimationForceTimer();
 404                         }
 405                 }
 406
 407                 /*
 408                         Get the meshbuffers of the block
 409                 */
 410                 {
 411                         //MutexAutoLock lock(block->mesh_mutex);
 412
 413                         MapBlockMesh *mapBlockMesh = block->mesh;
 414                         assert(mapBlockMesh);
 415
 416                         for (int layer = 0; layer < MAX_TILE_LAYERS; layer++) {
 417                                 scene::IMesh *mesh = mapBlockMesh->getMesh(layer);
 418                                 assert(mesh);
 419
 420                                 u32 c = mesh->getMeshBufferCount();
 421                                 for (u32 i = 0; i < c; i++) {
 422                                         scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 423
 424                                         video::SMaterial& material = buf->getMaterial();
 425                                         video::IMaterialRenderer* rnd =
 426                                                 driver->getMaterialRenderer(material.MaterialType);
 427                                         bool transparent = (rnd && rnd->isTransparent());
 428                                         if (transparent == is_transparent_pass) {
 429                                                 if (buf->getVertexCount() == 0)
 430                                                         errorstream << "Block [" << analyze_block(block)
 431                                                                 << "] contains an empty meshbuf" << std::endl;
 432
 433                                                 material.setFlag(video::EMF_TRILINEAR_FILTER,
 434                                                         m_cache_trilinear_filter);
 435                                                 material.setFlag(video::EMF_BILINEAR_FILTER,
 436                                                         m_cache_bilinear_filter);
 437                                                 material.setFlag(video::EMF_ANISOTROPIC_FILTER,
 438                                                         m_cache_anistropic_filter);
 439                                                 material.setFlag(video::EMF_WIREFRAME,
 440                                                         m_control.show_wireframe);
 441
 442                                                 drawbufs.add(buf, layer);
 443                                         }
 444                                 }
 445                         }
 446                 }
 447         }
 448
 449         // Render all layers in order
 450         for (int layer = 0; layer < MAX_TILE_LAYERS; layer++) {
 451                 std::vector<MeshBufList> &lists = drawbufs.lists[layer];
 452
 453                 int timecheck_counter = 0;
 454                 for (MeshBufList &list : lists) {
 455                         timecheck_counter++;
 456                         if (timecheck_counter > 50) {
 457                                 timecheck_counter = 0;
 458                                 std::time_t time2 = time(0);
 459                                 if (time2 > time1 + 4) {
 460                                         infostream << "ClientMap::renderMap(): "
 461                                                 "Rendering takes ages, returning."
 462                                                 << std::endl;
 463                                         return;
 464                                 }
 465                         }
 466
 467                         driver->setMaterial(list.m);
 468
 469                         for (scene::IMeshBuffer *buf : list.bufs) {
 470                                 driver->drawMeshBuffer(buf);
 471                                 vertex_count += buf->getVertexCount();
 472                                 meshbuffer_count++;
 473                         }
 474                 }
 475         }
 476         } // ScopeProfiler
 477
 478         // Log only on solid pass because values are the same
 479         if (pass == scene::ESNRP_SOLID) {
 480                 g_profiler->avg("CM: animated meshes", mesh_animate_count);
 481                 g_profiler->avg("CM: animated meshes (far)", mesh_animate_count_far);
 482         }
 483
 484         g_profiler->avg(prefix + "vertices drawn", vertex_count);
 485         if (blocks_had_pass_meshbuf != 0)
 486                 g_profiler->avg(prefix + "meshbuffers per block",
 487                         (float)meshbuffer_count / (float)blocks_had_pass_meshbuf);
 488         if (blocks_drawn != 0)
 489                 g_profiler->avg(prefix + "empty blocks (frac)",
 490                         (float)blocks_without_stuff / blocks_drawn);
 491 }
 492
 493 static bool getVisibleBrightness(Map *map, const v3f &p0, v3f dir, float step,
 494                 float step_multiplier, float start_distance, float end_distance,
 495                 INodeDefManager *ndef, u32 daylight_factor, float sunlight_min_d,
 496                 int *result, bool *sunlight_seen)
 497 {
 498         int brightness_sum = 0;
 499         int brightness_count = 0;
 500         float distance = start_distance;
 501         dir.normalize();
 502         v3f pf = p0;
 503         pf += dir * distance;
 504         int noncount = 0;
 505         bool nonlight_seen = false;
 506         bool allow_allowing_non_sunlight_propagates = false;
 507         bool allow_non_sunlight_propagates = false;
 508         // Check content nearly at camera position
 509         {
 510                 v3s16 p = floatToInt(p0 /*+ dir * 3*BS*/, BS);
 511                 MapNode n = map->getNodeNoEx(p);
 512                 if(ndef->get(n).param_type == CPT_LIGHT &&
 513                                 !ndef->get(n).sunlight_propagates)
 514                         allow_allowing_non_sunlight_propagates = true;
 515         }
 516         // If would start at CONTENT_IGNORE, start closer
 517         {
 518                 v3s16 p = floatToInt(pf, BS);
 519                 MapNode n = map->getNodeNoEx(p);
 520                 if(n.getContent() == CONTENT_IGNORE){
 521                         float newd = 2*BS;
 522                         pf = p0 + dir * 2*newd;
 523                         distance = newd;
 524                         sunlight_min_d = 0;
 525                 }
 526         }
 527         for (int i=0; distance < end_distance; i++) {
 528                 pf += dir * step;
 529                 distance += step;
 530                 step *= step_multiplier;
 531
 532                 v3s16 p = floatToInt(pf, BS);
 533                 MapNode n = map->getNodeNoEx(p);
 534                 if (allow_allowing_non_sunlight_propagates && i == 0 &&
 535                                 ndef->get(n).param_type == CPT_LIGHT &&
 536                                 !ndef->get(n).sunlight_propagates) {
 537                         allow_non_sunlight_propagates = true;
 538                 }
 539
 540                 if (ndef->get(n).param_type != CPT_LIGHT ||
 541                                 (!ndef->get(n).sunlight_propagates &&
 542                                         !allow_non_sunlight_propagates)){
 543                         nonlight_seen = true;
 544                         noncount++;
 545                         if(noncount >= 4)
 546                                 break;
 547                         continue;
 548                 }
 549
 550                 if (distance >= sunlight_min_d && !*sunlight_seen && !nonlight_seen)
 551                         if (n.getLight(LIGHTBANK_DAY, ndef) == LIGHT_SUN)
 552                                 *sunlight_seen = true;
 553                 noncount = 0;
 554                 brightness_sum += decode_light(n.getLightBlend(daylight_factor, ndef));
 555                 brightness_count++;
 556         }
 557         *result = 0;
 558         if(brightness_count == 0)
 559                 return false;
 560         *result = brightness_sum / brightness_count;
 561         /*std::cerr<<"Sampled "<<brightness_count<<" points; result="
 562                         <<(*result)<<std::endl;*/
 563         return true;
 564 }
 565
 566 int ClientMap::getBackgroundBrightness(float max_d, u32 daylight_factor,
 567                 int oldvalue, bool *sunlight_seen_result)
 568 {
 569         static v3f z_directions[50] = {
 570                 v3f(-100, 0, 0)
 571         };
 572         static f32 z_offsets[sizeof(z_directions)/sizeof(*z_directions)] = {
 573                 -1000,
 574         };
 575
 576         if(z_directions[0].X < -99){
 577                 for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 578                         // Assumes FOV of 72 and 16/9 aspect ratio
 579                         z_directions[i] = v3f(
 580                                 0.02 * myrand_range(-100, 100),
 581                                 1.0,
 582                                 0.01 * myrand_range(-100, 100)
 583                         ).normalize();
 584                         z_offsets[i] = 0.01 * myrand_range(0,100);
 585                 }
 586         }
 587
 588         int sunlight_seen_count = 0;
 589         float sunlight_min_d = max_d*0.8;
 590         if(sunlight_min_d > 35*BS)
 591                 sunlight_min_d = 35*BS;
 592         std::vector<int> values;
 593         for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 594                 v3f z_dir = z_directions[i];
 595                 core::CMatrix4<f32> a;
 596                 a.buildRotateFromTo(v3f(0,1,0), z_dir);
 597                 v3f dir = m_camera_direction;
 598                 a.rotateVect(dir);
 599                 int br = 0;
 600                 float step = BS*1.5;
 601                 if(max_d > 35*BS)
 602                         step = max_d / 35 * 1.5;
 603                 float off = step * z_offsets[i];
 604                 bool sunlight_seen_now = false;
 605                 bool ok = getVisibleBrightness(this, m_camera_position, dir,
 606                                 step, 1.0, max_d*0.6+off, max_d, m_nodedef, daylight_factor,
 607                                 sunlight_min_d,
 608                                 &br, &sunlight_seen_now);
 609                 if(sunlight_seen_now)
 610                         sunlight_seen_count++;
 611                 if(!ok)
 612                         continue;
 613                 values.push_back(br);
 614                 // Don't try too much if being in the sun is clear
 615                 if(sunlight_seen_count >= 20)
 616                         break;
 617         }
 618         int brightness_sum = 0;
 619         int brightness_count = 0;
 620         std::sort(values.begin(), values.end());
 621         u32 num_values_to_use = values.size();
 622         if(num_values_to_use >= 10)
 623                 num_values_to_use -= num_values_to_use/2;
 624         else if(num_values_to_use >= 7)
 625                 num_values_to_use -= num_values_to_use/3;
 626         u32 first_value_i = (values.size() - num_values_to_use) / 2;
 627
 628         for (u32 i=first_value_i; i < first_value_i + num_values_to_use; i++) {
 629                 brightness_sum += values[i];
 630                 brightness_count++;
 631         }
 632
 633         int ret = 0;
 634         if(brightness_count == 0){
 635                 MapNode n = getNodeNoEx(floatToInt(m_camera_position, BS));
 636                 if(m_nodedef->get(n).param_type == CPT_LIGHT){
 637                         ret = decode_light(n.getLightBlend(daylight_factor, m_nodedef));
 638                 } else {
 639                         ret = oldvalue;
 640                 }
 641         } else {
 642                 ret = brightness_sum / brightness_count;
 643         }
 644
 645         *sunlight_seen_result = (sunlight_seen_count > 0);
 646         return ret;
 647 }
 648
 649 void ClientMap::renderPostFx(CameraMode cam_mode)
 650 {
 651         // Sadly ISceneManager has no "post effects" render pass, in that case we
 652         // could just register for that and handle it in renderMap().
 653
 654         MapNode n = getNodeNoEx(floatToInt(m_camera_position, BS));
 655
 656         // - If the player is in a solid node, make everything black.
 657         // - If the player is in liquid, draw a semi-transparent overlay.
 658         // - Do not if player is in third person mode
 659         const ContentFeatures& features = m_nodedef->get(n);
 660         video::SColor post_effect_color = features.post_effect_color;
 661         if(features.solidness == 2 && !(g_settings->getBool("noclip") &&
 662                         m_client->checkLocalPrivilege("noclip")) &&
 663                         cam_mode == CAMERA_MODE_FIRST)
 664         {
 665                 post_effect_color = video::SColor(255, 0, 0, 0);
 666         }
 667         if (post_effect_color.getAlpha() != 0)
 668         {
 669                 // Draw a full-screen rectangle
 670                 video::IVideoDriver* driver = SceneManager->getVideoDriver();
 671                 v2u32 ss = driver->getScreenSize();
 672                 core::rect<s32> rect(0,0, ss.X, ss.Y);
 673                 driver->draw2DRectangle(post_effect_color, rect);
 674         }
 675 }
 676
 677 void ClientMap::PrintInfo(std::ostream &out)
 678 {
 679         out<<"ClientMap: ";
 680 }
 681
 682