src/client/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 "client/renderingengine.h"
  32
  33 #include <queue>
  34
  35 // struct MeshBufListList
  36 void MeshBufListList::clear()
  37 {
  38         for (auto &list : lists)
  39                 list.clear();
  40 }
  41
  42 void MeshBufListList::add(scene::IMeshBuffer *buf, v3s16 position, u8 layer)
  43 {
  44         // Append to the correct layer
  45         std::vector<MeshBufList> &list = lists[layer];
  46         const video::SMaterial &m = buf->getMaterial();
  47         for (MeshBufList &l : list) {
  48                 // comparing a full material is quite expensive so we don't do it if
  49                 // not even first texture is equal
  50                 if (l.m.TextureLayer[0].Texture != m.TextureLayer[0].Texture)
  51                         continue;
  52
  53                 if (l.m == m) {
  54                         l.bufs.emplace_back(position, buf);
  55                         return;
  56                 }
  57         }
  58         MeshBufList l;
  59         l.m = m;
  60         l.bufs.emplace_back(position, buf);
  61         list.emplace_back(l);
  62 }
  63
  64 static void on_settings_changed(const std::string &name, void *data)
  65 {
  66         static_cast<ClientMap*>(data)->onSettingChanged(name);
  67 }
  68 // ClientMap
  69
  70 ClientMap::ClientMap(
  71                 Client *client,
  72                 RenderingEngine *rendering_engine,
  73                 MapDrawControl &control,
  74                 s32 id
  75 ):
  76         Map(client),
  77         scene::ISceneNode(rendering_engine->get_scene_manager()->getRootSceneNode(),
  78                 rendering_engine->get_scene_manager(), id),
  79         m_client(client),
  80         m_rendering_engine(rendering_engine),
  81         m_control(control),
  82         m_drawlist(MapBlockComparer(v3s16(0,0,0)))
  83 {
  84
  85         /*
  86          * @Liso: Sadly C++ doesn't have introspection, so the only way we have to know
  87          * the class is whith a name ;) Name property cames from ISceneNode base class.
  88          */
  89         Name = "ClientMap";
  90         m_box = aabb3f(-BS*1000000,-BS*1000000,-BS*1000000,
  91                         BS*1000000,BS*1000000,BS*1000000);
  92
  93         /* TODO: Add a callback function so these can be updated when a setting
  94          *       changes.  At this point in time it doesn't matter (e.g. /set
  95          *       is documented to change server settings only)
  96          *
  97          * TODO: Local caching of settings is not optimal and should at some stage
  98          *       be updated to use a global settings object for getting thse values
  99          *       (as opposed to the this local caching). This can be addressed in
 100          *       a later release.
 101          */
 102         m_cache_trilinear_filter  = g_settings->getBool("trilinear_filter");
 103         m_cache_bilinear_filter   = g_settings->getBool("bilinear_filter");
 104         m_cache_anistropic_filter = g_settings->getBool("anisotropic_filter");
 105         m_cache_transparency_sorting_distance = g_settings->getU16("transparency_sorting_distance");
 106         m_enable_raytraced_culling = g_settings->getBool("enable_raytraced_culling");
 107         g_settings->registerChangedCallback("enable_raytraced_culling", on_settings_changed, this);
 108 }
 109
 110 void ClientMap::onSettingChanged(const std::string &name)
 111 {
 112         if (name == "enable_raytraced_culling")
 113                 m_enable_raytraced_culling = g_settings->getBool("enable_raytraced_culling");
 114 }
 115
 116 ClientMap::~ClientMap()
 117 {
 118         g_settings->deregisterChangedCallback("enable_raytraced_culling", on_settings_changed, this);
 119 }
 120
 121 void ClientMap::updateCamera(v3f pos, v3f dir, f32 fov, v3s16 offset)
 122 {
 123         v3s16 previous_node = floatToInt(m_camera_position, BS) + m_camera_offset;
 124         v3s16 previous_block = getContainerPos(previous_node, MAP_BLOCKSIZE);
 125
 126         m_camera_position = pos;
 127         m_camera_direction = dir;
 128         m_camera_fov = fov;
 129         m_camera_offset = offset;
 130
 131         v3s16 current_node = floatToInt(m_camera_position, BS) + m_camera_offset;
 132         v3s16 current_block = getContainerPos(current_node, MAP_BLOCKSIZE);
 133
 134         // reorder the blocks when camera crosses block boundary
 135         if (previous_block != current_block)
 136                 m_needs_update_drawlist = true;
 137
 138         // reorder transparent meshes when camera crosses node boundary
 139         if (previous_node != current_node)
 140                 m_needs_update_transparent_meshes = true;
 141 }
 142
 143 MapSector * ClientMap::emergeSector(v2s16 p2d)
 144 {
 145         // Check that it doesn't exist already
 146         MapSector *sector = getSectorNoGenerate(p2d);
 147
 148         // Create it if it does not exist yet
 149         if (!sector) {
 150                 sector = new MapSector(this, p2d, m_gamedef);
 151                 m_sectors[p2d] = sector;
 152         }
 153
 154         return sector;
 155 }
 156
 157 void ClientMap::OnRegisterSceneNode()
 158 {
 159         if(IsVisible)
 160         {
 161                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
 162                 SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
 163         }
 164
 165         ISceneNode::OnRegisterSceneNode();
 166         // It's not needed to register this node to the shadow renderer
 167         // we have other way to find it
 168 }
 169
 170 void ClientMap::getBlocksInViewRange(v3s16 cam_pos_nodes,
 171                 v3s16 *p_blocks_min, v3s16 *p_blocks_max, float range)
 172 {
 173         if (range <= 0.0f)
 174                 range = m_control.wanted_range;
 175
 176         v3s16 box_nodes_d = range * v3s16(1, 1, 1);
 177         // Define p_nodes_min/max as v3s32 because 'cam_pos_nodes -/+ box_nodes_d'
 178         // can exceed the range of v3s16 when a large view range is used near the
 179         // world edges.
 180         v3s32 p_nodes_min(
 181                 cam_pos_nodes.X - box_nodes_d.X,
 182                 cam_pos_nodes.Y - box_nodes_d.Y,
 183                 cam_pos_nodes.Z - box_nodes_d.Z);
 184         v3s32 p_nodes_max(
 185                 cam_pos_nodes.X + box_nodes_d.X,
 186                 cam_pos_nodes.Y + box_nodes_d.Y,
 187                 cam_pos_nodes.Z + box_nodes_d.Z);
 188         // Take a fair amount as we will be dropping more out later
 189         // Umm... these additions are a bit strange but they are needed.
 190         *p_blocks_min = v3s16(
 191                         p_nodes_min.X / MAP_BLOCKSIZE - 3,
 192                         p_nodes_min.Y / MAP_BLOCKSIZE - 3,
 193                         p_nodes_min.Z / MAP_BLOCKSIZE - 3);
 194         *p_blocks_max = v3s16(
 195                         p_nodes_max.X / MAP_BLOCKSIZE + 1,
 196                         p_nodes_max.Y / MAP_BLOCKSIZE + 1,
 197                         p_nodes_max.Z / MAP_BLOCKSIZE + 1);
 198 }
 199
 200 class MapBlockFlags
 201 {
 202 public:
 203         static constexpr u16 CHUNK_EDGE = 8;
 204         static constexpr u16 CHUNK_MASK = CHUNK_EDGE - 1;
 205         static constexpr std::size_t CHUNK_VOLUME = CHUNK_EDGE * CHUNK_EDGE * CHUNK_EDGE; // volume of a chunk
 206
 207         MapBlockFlags(v3s16 min_pos, v3s16 max_pos)
 208                         : min_pos(min_pos), volume((max_pos - min_pos) / CHUNK_EDGE + 1)
 209         {
 210                 chunks.resize(volume.X * volume.Y * volume.Z);
 211         }
 212
 213         class Chunk
 214         {
 215         public:
 216                 inline u8 &getBits(v3s16 pos)
 217                 {
 218                         std::size_t address = getAddress(pos);
 219                         return bits[address];
 220                 }
 221
 222         private:
 223                 inline std::size_t getAddress(v3s16 pos) {
 224                         std::size_t address = (pos.X & CHUNK_MASK) + (pos.Y & CHUNK_MASK) * CHUNK_EDGE + (pos.Z & CHUNK_MASK) * (CHUNK_EDGE * CHUNK_EDGE);
 225                         return address;
 226                 }
 227
 228                 std::array<u8, CHUNK_VOLUME> bits;
 229         };
 230
 231         Chunk &getChunk(v3s16 pos)
 232         {
 233                 v3s16 delta = (pos - min_pos) / CHUNK_EDGE;
 234                 std::size_t address = delta.X + delta.Y * volume.X + delta.Z * volume.X * volume.Y;
 235                 Chunk *chunk = chunks[address].get();
 236                 if (!chunk) {
 237                         chunk = new Chunk();
 238                         chunks[address].reset(chunk);
 239                 }
 240                 return *chunk;
 241         }
 242 private:
 243         std::vector<std::unique_ptr<Chunk>> chunks;
 244         v3s16 min_pos;
 245         v3s16 volume;
 246 };
 247
 248 void ClientMap::updateDrawList()
 249 {
 250         ScopeProfiler sp(g_profiler, "CM::updateDrawList()", SPT_AVG);
 251
 252         m_needs_update_drawlist = false;
 253
 254         for (auto &i : m_drawlist) {
 255                 MapBlock *block = i.second;
 256                 block->refDrop();
 257         }
 258         m_drawlist.clear();
 259
 260         v3s16 cam_pos_nodes = floatToInt(m_camera_position, BS);
 261
 262         v3s16 p_blocks_min;
 263         v3s16 p_blocks_max;
 264         getBlocksInViewRange(cam_pos_nodes, &p_blocks_min, &p_blocks_max);
 265
 266         // Number of blocks occlusion culled
 267         u32 blocks_occlusion_culled = 0;
 268         // Blocks visited by the algorithm
 269         u32 blocks_visited = 0;
 270         // Block sides that were not traversed
 271         u32 sides_skipped = 0;
 272
 273         // No occlusion culling when free_move is on and camera is inside ground
 274         bool occlusion_culling_enabled = true;
 275         if (m_control.allow_noclip) {
 276                 MapNode n = getNode(cam_pos_nodes);
 277                 if (n.getContent() == CONTENT_IGNORE || m_nodedef->get(n).solidness == 2)
 278                         occlusion_culling_enabled = false;
 279         }
 280
 281         v3s16 camera_block = getContainerPos(cam_pos_nodes, MAP_BLOCKSIZE);
 282         m_drawlist = std::map<v3s16, MapBlock*, MapBlockComparer>(MapBlockComparer(camera_block));
 283
 284         auto is_frustum_culled = m_client->getCamera()->getFrustumCuller();
 285
 286         // Uncomment to debug occluded blocks in the wireframe mode
 287         // TODO: Include this as a flag for an extended debugging setting
 288         // if (occlusion_culling_enabled && m_control.show_wireframe)
 289         //      occlusion_culling_enabled = porting::getTimeS() & 1;
 290
 291         std::queue<v3s16> blocks_to_consider;
 292
 293         // Bits per block:
 294         // [ visited | 0 | 0 | 0 | 0 | Z visible | Y visible | X visible ]
 295         MapBlockFlags blocks_seen(p_blocks_min, p_blocks_max);
 296
 297         // Start breadth-first search with the block the camera is in
 298         blocks_to_consider.push(camera_block);
 299         blocks_seen.getChunk(camera_block).getBits(camera_block) = 0x07; // mark all sides as visible
 300
 301         // Recursively walk the space and pick mapblocks for drawing
 302         while (blocks_to_consider.size() > 0) {
 303
 304                 v3s16 block_coord = blocks_to_consider.front();
 305                 blocks_to_consider.pop();
 306
 307                 auto &flags = blocks_seen.getChunk(block_coord).getBits(block_coord);
 308
 309                 // Only visit each block once (it may have been queued up to three times)
 310                 if ((flags & 0x80) == 0x80)
 311                         continue;
 312                 flags |= 0x80;
 313
 314                 blocks_visited++;
 315
 316                 // Get the sector, block and mesh
 317                 MapSector *sector = this->getSectorNoGenerate(v2s16(block_coord.X, block_coord.Z));
 318
 319                 if (!sector)
 320                         continue;
 321
 322                 MapBlock *block = sector->getBlockNoCreateNoEx(block_coord.Y);
 323
 324                 MapBlockMesh *mesh = block ? block->mesh : nullptr;
 325
 326
 327                 // Calculate the coordinates for range and frutum culling
 328                 v3f mesh_sphere_center;
 329                 f32 mesh_sphere_radius;
 330
 331                 v3s16 block_pos_nodes = block_coord * MAP_BLOCKSIZE;
 332
 333                 if (mesh) {
 334                         mesh_sphere_center = intToFloat(block_pos_nodes, BS)
 335                                         + mesh->getBoundingSphereCenter();
 336                         mesh_sphere_radius = mesh->getBoundingRadius();
 337                 }
 338                 else {
 339                         mesh_sphere_center = intToFloat(block_pos_nodes, BS) + v3f((MAP_BLOCKSIZE * 0.5f - 0.5f) * BS);
 340                         mesh_sphere_radius = 0.0f;
 341                 }
 342
 343                 // First, perform a simple distance check.
 344                 if (!m_control.range_all &&
 345                         mesh_sphere_center.getDistanceFrom(intToFloat(cam_pos_nodes, BS)) >
 346                                 m_control.wanted_range * BS + mesh_sphere_radius)
 347                         continue; // Out of range, skip.
 348
 349                 // Frustum culling
 350                 // Only do coarse culling here, to account for fast camera movement.
 351                 // This is needed because this function is not called every frame.
 352                 float frustum_cull_extra_radius = 300.0f;
 353                 if (is_frustum_culled(mesh_sphere_center,
 354                                 mesh_sphere_radius + frustum_cull_extra_radius))
 355                         continue;
 356
 357                 // Calculate the vector from the camera block to the current block
 358                 // We use it to determine through which sides of the current block we can continue the search
 359                 v3s16 look = block_coord - camera_block;
 360
 361                 // Occluded near sides will further occlude the far sides
 362                 u8 visible_outer_sides = flags & 0x07;
 363
 364                 // Raytraced occlusion culling - send rays from the camera to the block's corners
 365                 if (occlusion_culling_enabled && m_enable_raytraced_culling &&
 366                                 block && mesh &&
 367                                 visible_outer_sides != 0x07 && isBlockOccluded(block, cam_pos_nodes)) {
 368                         blocks_occlusion_culled++;
 369                         continue;
 370                 }
 371
 372                 // The block is visible, add to the draw list
 373                 if (mesh) {
 374                         // Add to set
 375                         block->refGrab();
 376                         m_drawlist[block_coord] = block;
 377                 }
 378
 379                 // Decide which sides to traverse next or to block away
 380
 381                 // First, find the near sides that would occlude the far sides
 382                 // * A near side can itself be occluded by a nearby block (the test above ^^)
 383                 // * A near side can be visible but fully opaque by itself (e.g. ground at the 0 level)
 384
 385                 // mesh solid sides are +Z-Z+Y-Y+X-X
 386                 // if we are inside the block's coordinates on an axis,
 387                 // treat these sides as opaque, as they should not allow to reach the far sides
 388                 u8 block_inner_sides = (look.X == 0 ? 3 : 0) |
 389                         (look.Y == 0 ? 12 : 0) |
 390                         (look.Z == 0 ? 48 : 0);
 391
 392                 // get the mask for the sides that are relevant based on the direction
 393                 u8 near_inner_sides = (look.X > 0 ? 1 : 2) |
 394                                 (look.Y > 0 ? 4 : 8) |
 395                                 (look.Z > 0 ? 16 : 32);
 396
 397                 // This bitset is +Z-Z+Y-Y+X-X (See MapBlockMesh), and axis is XYZ.
 398                 // Get he block's transparent sides
 399                 u8 transparent_sides = (occlusion_culling_enabled && block) ? ~block->solid_sides : 0x3F;
 400
 401                 // compress block transparent sides to ZYX mask of see-through axes
 402                 u8 near_transparency =  (block_inner_sides == 0x3F) ? near_inner_sides : (transparent_sides & near_inner_sides);
 403
 404                 // when we are inside the camera block, do not block any sides
 405                 if (block_inner_sides == 0x3F)
 406                         block_inner_sides = 0;
 407
 408                 near_transparency &= ~block_inner_sides & 0x3F;
 409
 410                 near_transparency |= (near_transparency >> 1);
 411                 near_transparency = (near_transparency & 1) |
 412                                 ((near_transparency >> 1) & 2) |
 413                                 ((near_transparency >> 2) & 4);
 414
 415                 // combine with known visible sides that matter
 416                 near_transparency &= visible_outer_sides;
 417
 418                 // The rule for any far side to be visible:
 419                 // * Any of the adjacent near sides is transparent (different axes)
 420                 // * The opposite near side (same axis) is transparent, if it is the dominant axis of the look vector
 421
 422                 // Calculate vector from camera to mapblock center. Because we only need relation between
 423                 // coordinates we scale by 2 to avoid precision loss.
 424                 v3s16 precise_look = 2 * (block_pos_nodes - cam_pos_nodes) + MAP_BLOCKSIZE - 1;
 425
 426                 // dominant axis flag
 427                 u8 dominant_axis = (abs(precise_look.X) > abs(precise_look.Y) && abs(precise_look.X) > abs(precise_look.Z)) |
 428                                         ((abs(precise_look.Y) > abs(precise_look.Z) && abs(precise_look.Y) > abs(precise_look.X)) << 1) |
 429                                         ((abs(precise_look.Z) > abs(precise_look.X) && abs(precise_look.Z) > abs(precise_look.Y)) << 2);
 430
 431                 // Queue next blocks for processing:
 432                 // - Examine "far" sides of the current blocks, i.e. never move towards the camera
 433                 // - Only traverse the sides that are not occluded
 434                 // - Only traverse the sides that are not opaque
 435                 // When queueing, mark the relevant side on the next block as 'visible'
 436                 for (s16 axis = 0; axis < 3; axis++) {
 437
 438                         // Select a bit from transparent_sides for the side
 439                         u8 far_side_mask = 1 << (2 * axis);
 440
 441                         // axis flag
 442                         u8 my_side = 1 << axis;
 443                         u8 adjacent_sides = my_side ^ 0x07;
 444
 445                         auto traverse_far_side = [&](s8 next_pos_offset) {
 446                                 // far side is visible if adjacent near sides are transparent, or if opposite side on dominant axis is transparent
 447                                 bool side_visible = ((near_transparency & adjacent_sides) | (near_transparency & my_side & dominant_axis)) != 0;
 448                                 side_visible = side_visible && ((far_side_mask & transparent_sides) != 0);
 449
 450                                 v3s16 next_pos = block_coord;
 451                                 next_pos[axis] += next_pos_offset;
 452
 453                                 // If a side is a see-through, mark the next block's side as visible, and queue
 454                                 if (side_visible) {
 455                                         auto &next_flags = blocks_seen.getChunk(next_pos).getBits(next_pos);
 456                                         next_flags |= my_side;
 457                                         blocks_to_consider.push(next_pos);
 458                                 }
 459                                 else {
 460                                         sides_skipped++;
 461                                 }
 462                         };
 463
 464
 465                         // Test the '-' direction of the axis
 466                         if (look[axis] <= 0 && block_coord[axis] > p_blocks_min[axis])
 467                                 traverse_far_side(-1);
 468
 469                         // Test the '+' direction of the axis
 470                         far_side_mask <<= 1;
 471
 472                         if (look[axis] >= 0 && block_coord[axis] < p_blocks_max[axis])
 473                                 traverse_far_side(+1);
 474                 }
 475         }
 476
 477         g_profiler->avg("MapBlocks occlusion culled [#]", blocks_occlusion_culled);
 478         g_profiler->avg("MapBlocks sides skipped [#]", sides_skipped);
 479         g_profiler->avg("MapBlocks examined [#]", blocks_visited);
 480         g_profiler->avg("MapBlocks drawn [#]", m_drawlist.size());
 481 }
 482
 483 void ClientMap::touchMapBlocks()
 484 {
 485         v3s16 cam_pos_nodes = floatToInt(m_camera_position, BS);
 486
 487         v3s16 p_blocks_min;
 488         v3s16 p_blocks_max;
 489         getBlocksInViewRange(cam_pos_nodes, &p_blocks_min, &p_blocks_max);
 490
 491         // Number of blocks currently loaded by the client
 492         u32 blocks_loaded = 0;
 493         // Number of blocks with mesh in rendering range
 494         u32 blocks_in_range_with_mesh = 0;
 495
 496         for (const auto &sector_it : m_sectors) {
 497                 MapSector *sector = sector_it.second;
 498                 v2s16 sp = sector->getPos();
 499
 500                 blocks_loaded += sector->size();
 501                 if (!m_control.range_all) {
 502                         if (sp.X < p_blocks_min.X || sp.X > p_blocks_max.X ||
 503                                         sp.Y < p_blocks_min.Z || sp.Y > p_blocks_max.Z)
 504                                 continue;
 505                 }
 506
 507                 MapBlockVect sectorblocks;
 508                 sector->getBlocks(sectorblocks);
 509
 510                 /*
 511                         Loop through blocks in sector
 512                 */
 513
 514                 for (MapBlock *block : sectorblocks) {
 515                         /*
 516                                 Compare block position to camera position, skip
 517                                 if not seen on display
 518                         */
 519
 520                         if (!block->mesh) {
 521                                 // Ignore if mesh doesn't exist
 522                                 continue;
 523                         }
 524
 525                         v3f mesh_sphere_center = intToFloat(block->getPosRelative(), BS)
 526                                         + block->mesh->getBoundingSphereCenter();
 527                         f32 mesh_sphere_radius = block->mesh->getBoundingRadius();
 528                         // First, perform a simple distance check.
 529                         if (!m_control.range_all &&
 530                                 mesh_sphere_center.getDistanceFrom(intToFloat(cam_pos_nodes, BS)) >
 531                                         m_control.wanted_range * BS + mesh_sphere_radius)
 532                                 continue; // Out of range, skip.
 533
 534                         // Keep the block alive as long as it is in range.
 535                         block->resetUsageTimer();
 536                         blocks_in_range_with_mesh++;
 537                 }
 538         }
 539         g_profiler->avg("MapBlock meshes in range [#]", blocks_in_range_with_mesh);
 540         g_profiler->avg("MapBlocks loaded [#]", blocks_loaded);
 541 }
 542
 543 void ClientMap::renderMap(video::IVideoDriver* driver, s32 pass)
 544 {
 545         bool is_transparent_pass = pass == scene::ESNRP_TRANSPARENT;
 546
 547         std::string prefix;
 548         if (pass == scene::ESNRP_SOLID)
 549                 prefix = "renderMap(SOLID): ";
 550         else
 551                 prefix = "renderMap(TRANSPARENT): ";
 552
 553         /*
 554                 This is called two times per frame, reset on the non-transparent one
 555         */
 556         if (pass == scene::ESNRP_SOLID)
 557                 m_last_drawn_sectors.clear();
 558
 559         /*
 560                 Get animation parameters
 561         */
 562         const float animation_time = m_client->getAnimationTime();
 563         const int crack = m_client->getCrackLevel();
 564         const u32 daynight_ratio = m_client->getEnv().getDayNightRatio();
 565
 566         const v3f camera_position = m_camera_position;
 567
 568         /*
 569                 Get all blocks and draw all visible ones
 570         */
 571
 572         u32 vertex_count = 0;
 573         u32 drawcall_count = 0;
 574
 575         // For limiting number of mesh animations per frame
 576         u32 mesh_animate_count = 0;
 577         //u32 mesh_animate_count_far = 0;
 578
 579         /*
 580                 Update transparent meshes
 581         */
 582         if (is_transparent_pass)
 583                 updateTransparentMeshBuffers();
 584
 585         /*
 586                 Draw the selected MapBlocks
 587         */
 588
 589         MeshBufListList grouped_buffers;
 590         std::vector<DrawDescriptor> draw_order;
 591         video::SMaterial previous_material;
 592
 593         auto is_frustum_culled = m_client->getCamera()->getFrustumCuller();
 594
 595         for (auto &i : m_drawlist) {
 596                 v3s16 block_pos = i.first;
 597                 MapBlock *block = i.second;
 598                 MapBlockMesh *block_mesh = block->mesh;
 599
 600                 // If the mesh of the block happened to get deleted, ignore it
 601                 if (!block_mesh)
 602                         continue;
 603
 604                 // Do exact frustum culling
 605                 // (The one in updateDrawList is only coarse.)
 606                 v3f mesh_sphere_center = intToFloat(block->getPosRelative(), BS)
 607                                 + block_mesh->getBoundingSphereCenter();
 608                 f32 mesh_sphere_radius = block_mesh->getBoundingRadius();
 609                 if (is_frustum_culled(mesh_sphere_center, mesh_sphere_radius))
 610                         continue;
 611
 612                 v3f block_pos_r = intToFloat(block->getPosRelative() + MAP_BLOCKSIZE / 2, BS);
 613
 614                 float d = camera_position.getDistanceFrom(block_pos_r);
 615                 d = MYMAX(0,d - BLOCK_MAX_RADIUS);
 616
 617                 // Mesh animation
 618                 if (pass == scene::ESNRP_SOLID) {
 619                         // Pretty random but this should work somewhat nicely
 620                         bool faraway = d >= BS * 50;
 621                         if (block_mesh->isAnimationForced() || !faraway ||
 622                                         mesh_animate_count < (m_control.range_all ? 200 : 50)) {
 623
 624                                 bool animated = block_mesh->animate(faraway, animation_time,
 625                                         crack, daynight_ratio);
 626                                 if (animated)
 627                                         mesh_animate_count++;
 628                         } else {
 629                                 block_mesh->decreaseAnimationForceTimer();
 630                         }
 631                 }
 632
 633                 /*
 634                         Get the meshbuffers of the block
 635                 */
 636                 if (is_transparent_pass) {
 637                         // In transparent pass, the mesh will give us
 638                         // the partial buffers in the correct order
 639                         for (auto &buffer : block_mesh->getTransparentBuffers())
 640                                 draw_order.emplace_back(block_pos, &buffer);
 641                 }
 642                 else {
 643                         // otherwise, group buffers across meshes
 644                         // using MeshBufListList
 645                         for (int layer = 0; layer < MAX_TILE_LAYERS; layer++) {
 646                                 scene::IMesh *mesh = block_mesh->getMesh(layer);
 647                                 assert(mesh);
 648
 649                                 u32 c = mesh->getMeshBufferCount();
 650                                 for (u32 i = 0; i < c; i++) {
 651                                         scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 652
 653                                         video::SMaterial& material = buf->getMaterial();
 654                                         video::IMaterialRenderer* rnd =
 655                                                         driver->getMaterialRenderer(material.MaterialType);
 656                                         bool transparent = (rnd && rnd->isTransparent());
 657                                         if (!transparent) {
 658                                                 if (buf->getVertexCount() == 0)
 659                                                         errorstream << "Block [" << analyze_block(block)
 660                                                                         << "] contains an empty meshbuf" << std::endl;
 661
 662                                                 grouped_buffers.add(buf, block_pos, layer);
 663                                         }
 664                                 }
 665                         }
 666                 }
 667         }
 668
 669         // Capture draw order for all solid meshes
 670         for (auto &lists : grouped_buffers.lists) {
 671                 for (MeshBufList &list : lists) {
 672                         // iterate in reverse to draw closest blocks first
 673                         for (auto it = list.bufs.rbegin(); it != list.bufs.rend(); ++it) {
 674                                 draw_order.emplace_back(it->first, it->second, it != list.bufs.rbegin());
 675                         }
 676                 }
 677         }
 678
 679         TimeTaker draw("Drawing mesh buffers");
 680
 681         core::matrix4 m; // Model matrix
 682         v3f offset = intToFloat(m_camera_offset, BS);
 683         u32 material_swaps = 0;
 684
 685         // Render all mesh buffers in order
 686         drawcall_count += draw_order.size();
 687
 688         for (auto &descriptor : draw_order) {
 689                 scene::IMeshBuffer *buf = descriptor.getBuffer();
 690
 691                 if (!descriptor.m_reuse_material) {
 692                         auto &material = buf->getMaterial();
 693
 694                         // Apply filter settings
 695                         material.setFlag(video::EMF_TRILINEAR_FILTER,
 696                                 m_cache_trilinear_filter);
 697                         material.setFlag(video::EMF_BILINEAR_FILTER,
 698                                 m_cache_bilinear_filter);
 699                         material.setFlag(video::EMF_ANISOTROPIC_FILTER,
 700                                 m_cache_anistropic_filter);
 701                         material.setFlag(video::EMF_WIREFRAME,
 702                                 m_control.show_wireframe);
 703
 704                         // pass the shadow map texture to the buffer texture
 705                         ShadowRenderer *shadow = m_rendering_engine->get_shadow_renderer();
 706                         if (shadow && shadow->is_active()) {
 707                                 auto &layer = material.TextureLayer[ShadowRenderer::TEXTURE_LAYER_SHADOW];
 708                                 layer.Texture = shadow->get_texture();
 709                                 layer.TextureWrapU = video::E_TEXTURE_CLAMP::ETC_CLAMP_TO_EDGE;
 710                                 layer.TextureWrapV = video::E_TEXTURE_CLAMP::ETC_CLAMP_TO_EDGE;
 711                                 // Do not enable filter on shadow texture to avoid visual artifacts
 712                                 // with colored shadows.
 713                                 // Filtering is done in shader code anyway
 714                                 layer.BilinearFilter = false;
 715                                 layer.AnisotropicFilter = false;
 716                                 layer.TrilinearFilter = false;
 717                         }
 718                         driver->setMaterial(material);
 719                         ++material_swaps;
 720                         material.TextureLayer[ShadowRenderer::TEXTURE_LAYER_SHADOW].Texture = nullptr;
 721                 }
 722
 723                 v3f block_wpos = intToFloat(descriptor.m_pos * MAP_BLOCKSIZE, BS);
 724                 m.setTranslation(block_wpos - offset);
 725
 726                 driver->setTransform(video::ETS_WORLD, m);
 727                 descriptor.draw(driver);
 728                 vertex_count += buf->getIndexCount();
 729         }
 730
 731         g_profiler->avg(prefix + "draw meshes [ms]", draw.stop(true));
 732
 733         // Log only on solid pass because values are the same
 734         if (pass == scene::ESNRP_SOLID) {
 735                 g_profiler->avg("renderMap(): animated meshes [#]", mesh_animate_count);
 736         }
 737
 738         if (pass == scene::ESNRP_TRANSPARENT) {
 739                 g_profiler->avg("renderMap(): transparent buffers [#]", draw_order.size());
 740         }
 741
 742         g_profiler->avg(prefix + "vertices drawn [#]", vertex_count);
 743         g_profiler->avg(prefix + "drawcalls [#]", drawcall_count);
 744         g_profiler->avg(prefix + "material swaps [#]", material_swaps);
 745 }
 746
 747 static bool getVisibleBrightness(Map *map, const v3f &p0, v3f dir, float step,
 748         float step_multiplier, float start_distance, float end_distance,
 749         const NodeDefManager *ndef, u32 daylight_factor, float sunlight_min_d,
 750         int *result, bool *sunlight_seen)
 751 {
 752         int brightness_sum = 0;
 753         int brightness_count = 0;
 754         float distance = start_distance;
 755         dir.normalize();
 756         v3f pf = p0;
 757         pf += dir * distance;
 758         int noncount = 0;
 759         bool nonlight_seen = false;
 760         bool allow_allowing_non_sunlight_propagates = false;
 761         bool allow_non_sunlight_propagates = false;
 762         // Check content nearly at camera position
 763         {
 764                 v3s16 p = floatToInt(p0 /*+ dir * 3*BS*/, BS);
 765                 MapNode n = map->getNode(p);
 766                 if(ndef->getLightingFlags(n).has_light &&
 767                                 !ndef->getLightingFlags(n).sunlight_propagates)
 768                         allow_allowing_non_sunlight_propagates = true;
 769         }
 770         // If would start at CONTENT_IGNORE, start closer
 771         {
 772                 v3s16 p = floatToInt(pf, BS);
 773                 MapNode n = map->getNode(p);
 774                 if(n.getContent() == CONTENT_IGNORE){
 775                         float newd = 2*BS;
 776                         pf = p0 + dir * 2*newd;
 777                         distance = newd;
 778                         sunlight_min_d = 0;
 779                 }
 780         }
 781         for (int i=0; distance < end_distance; i++) {
 782                 pf += dir * step;
 783                 distance += step;
 784                 step *= step_multiplier;
 785
 786                 v3s16 p = floatToInt(pf, BS);
 787                 MapNode n = map->getNode(p);
 788                 ContentLightingFlags f = ndef->getLightingFlags(n);
 789                 if (allow_allowing_non_sunlight_propagates && i == 0 &&
 790                                 f.has_light && !f.sunlight_propagates) {
 791                         allow_non_sunlight_propagates = true;
 792                 }
 793
 794                 if (!f.has_light || (!f.sunlight_propagates && !allow_non_sunlight_propagates)){
 795                         nonlight_seen = true;
 796                         noncount++;
 797                         if(noncount >= 4)
 798                                 break;
 799                         continue;
 800                 }
 801
 802                 if (distance >= sunlight_min_d && !*sunlight_seen && !nonlight_seen)
 803                         if (n.getLight(LIGHTBANK_DAY, f) == LIGHT_SUN)
 804                                 *sunlight_seen = true;
 805                 noncount = 0;
 806                 brightness_sum += decode_light(n.getLightBlend(daylight_factor, f));
 807                 brightness_count++;
 808         }
 809         *result = 0;
 810         if(brightness_count == 0)
 811                 return false;
 812         *result = brightness_sum / brightness_count;
 813         /*std::cerr<<"Sampled "<<brightness_count<<" points; result="
 814                         <<(*result)<<std::endl;*/
 815         return true;
 816 }
 817
 818 int ClientMap::getBackgroundBrightness(float max_d, u32 daylight_factor,
 819                 int oldvalue, bool *sunlight_seen_result)
 820 {
 821         ScopeProfiler sp(g_profiler, "CM::getBackgroundBrightness", SPT_AVG);
 822         static v3f z_directions[50] = {
 823                 v3f(-100, 0, 0)
 824         };
 825         static f32 z_offsets[50] = {
 826                 -1000,
 827         };
 828
 829         if (z_directions[0].X < -99) {
 830                 for (u32 i = 0; i < ARRLEN(z_directions); i++) {
 831                         // Assumes FOV of 72 and 16/9 aspect ratio
 832                         z_directions[i] = v3f(
 833                                 0.02 * myrand_range(-100, 100),
 834                                 1.0,
 835                                 0.01 * myrand_range(-100, 100)
 836                         ).normalize();
 837                         z_offsets[i] = 0.01 * myrand_range(0,100);
 838                 }
 839         }
 840
 841         int sunlight_seen_count = 0;
 842         float sunlight_min_d = max_d*0.8;
 843         if(sunlight_min_d > 35*BS)
 844                 sunlight_min_d = 35*BS;
 845         std::vector<int> values;
 846         values.reserve(ARRLEN(z_directions));
 847         for (u32 i = 0; i < ARRLEN(z_directions); i++) {
 848                 v3f z_dir = z_directions[i];
 849                 core::CMatrix4<f32> a;
 850                 a.buildRotateFromTo(v3f(0,1,0), z_dir);
 851                 v3f dir = m_camera_direction;
 852                 a.rotateVect(dir);
 853                 int br = 0;
 854                 float step = BS*1.5;
 855                 if(max_d > 35*BS)
 856                         step = max_d / 35 * 1.5;
 857                 float off = step * z_offsets[i];
 858                 bool sunlight_seen_now = false;
 859                 bool ok = getVisibleBrightness(this, m_camera_position, dir,
 860                                 step, 1.0, max_d*0.6+off, max_d, m_nodedef, daylight_factor,
 861                                 sunlight_min_d,
 862                                 &br, &sunlight_seen_now);
 863                 if(sunlight_seen_now)
 864                         sunlight_seen_count++;
 865                 if(!ok)
 866                         continue;
 867                 values.push_back(br);
 868                 // Don't try too much if being in the sun is clear
 869                 if(sunlight_seen_count >= 20)
 870                         break;
 871         }
 872         int brightness_sum = 0;
 873         int brightness_count = 0;
 874         std::sort(values.begin(), values.end());
 875         u32 num_values_to_use = values.size();
 876         if(num_values_to_use >= 10)
 877                 num_values_to_use -= num_values_to_use/2;
 878         else if(num_values_to_use >= 7)
 879                 num_values_to_use -= num_values_to_use/3;
 880         u32 first_value_i = (values.size() - num_values_to_use) / 2;
 881
 882         for (u32 i=first_value_i; i < first_value_i + num_values_to_use; i++) {
 883                 brightness_sum += values[i];
 884                 brightness_count++;
 885         }
 886
 887         int ret = 0;
 888         if(brightness_count == 0){
 889                 MapNode n = getNode(floatToInt(m_camera_position, BS));
 890                 ContentLightingFlags f = m_nodedef->getLightingFlags(n);
 891                 if(f.has_light){
 892                         ret = decode_light(n.getLightBlend(daylight_factor, f));
 893                 } else {
 894                         ret = oldvalue;
 895                 }
 896         } else {
 897                 ret = brightness_sum / brightness_count;
 898         }
 899
 900         *sunlight_seen_result = (sunlight_seen_count > 0);
 901         return ret;
 902 }
 903
 904 void ClientMap::renderPostFx(CameraMode cam_mode)
 905 {
 906         // Sadly ISceneManager has no "post effects" render pass, in that case we
 907         // could just register for that and handle it in renderMap().
 908
 909         MapNode n = getNode(floatToInt(m_camera_position, BS));
 910
 911         const ContentFeatures& features = m_nodedef->get(n);
 912         video::SColor post_effect_color = features.post_effect_color;
 913
 914         // If the camera is in a solid node, make everything black.
 915         // (first person mode only)
 916         if (features.solidness == 2 && cam_mode == CAMERA_MODE_FIRST &&
 917                 !m_control.allow_noclip) {
 918                 post_effect_color = video::SColor(255, 0, 0, 0);
 919         }
 920
 921         if (post_effect_color.getAlpha() != 0) {
 922                 // Draw a full-screen rectangle
 923                 video::IVideoDriver* driver = SceneManager->getVideoDriver();
 924                 v2u32 ss = driver->getScreenSize();
 925                 core::rect<s32> rect(0,0, ss.X, ss.Y);
 926                 driver->draw2DRectangle(post_effect_color, rect);
 927         }
 928 }
 929
 930 void ClientMap::PrintInfo(std::ostream &out)
 931 {
 932         out<<"ClientMap: ";
 933 }
 934
 935 void ClientMap::renderMapShadows(video::IVideoDriver *driver,
 936                 const video::SMaterial &material, s32 pass, int frame, int total_frames)
 937 {
 938         bool is_transparent_pass = pass != scene::ESNRP_SOLID;
 939         std::string prefix;
 940         if (is_transparent_pass)
 941                 prefix = "renderMap(SHADOW TRANS): ";
 942         else
 943                 prefix = "renderMap(SHADOW SOLID): ";
 944
 945         u32 drawcall_count = 0;
 946         u32 vertex_count = 0;
 947
 948         MeshBufListList grouped_buffers;
 949         std::vector<DrawDescriptor> draw_order;
 950
 951
 952         int count = 0;
 953         int low_bound = is_transparent_pass ? 0 : m_drawlist_shadow.size() / total_frames * frame;
 954         int high_bound = is_transparent_pass ? m_drawlist_shadow.size() : m_drawlist_shadow.size() / total_frames * (frame + 1);
 955
 956         // transparent pass should be rendered in one go
 957         if (is_transparent_pass && frame != total_frames - 1) {
 958                 return;
 959         }
 960
 961         for (const auto &i : m_drawlist_shadow) {
 962                 // only process specific part of the list & break early
 963                 ++count;
 964                 if (count <= low_bound)
 965                         continue;
 966                 if (count > high_bound)
 967                         break;
 968
 969                 v3s16 block_pos = i.first;
 970                 MapBlock *block = i.second;
 971
 972                 // If the mesh of the block happened to get deleted, ignore it
 973                 if (!block->mesh)
 974                         continue;
 975
 976                 /*
 977                         Get the meshbuffers of the block
 978                 */
 979                 if (is_transparent_pass) {
 980                         // In transparent pass, the mesh will give us
 981                         // the partial buffers in the correct order
 982                         for (auto &buffer : block->mesh->getTransparentBuffers())
 983                                 draw_order.emplace_back(block_pos, &buffer);
 984                 }
 985                 else {
 986                         // otherwise, group buffers across meshes
 987                         // using MeshBufListList
 988                         MapBlockMesh *mapBlockMesh = block->mesh;
 989                         assert(mapBlockMesh);
 990
 991                         for (int layer = 0; layer < MAX_TILE_LAYERS; layer++) {
 992                                 scene::IMesh *mesh = mapBlockMesh->getMesh(layer);
 993                                 assert(mesh);
 994
 995                                 u32 c = mesh->getMeshBufferCount();
 996                                 for (u32 i = 0; i < c; i++) {
 997                                         scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 998
 999                                         video::SMaterial &mat = buf->getMaterial();
1000                                         auto rnd = driver->getMaterialRenderer(mat.MaterialType);
1001                                         bool transparent = rnd && rnd->isTransparent();
1002                                         if (!transparent)
1003                                                 grouped_buffers.add(buf, block_pos, layer);
1004                                 }
1005                         }
1006                 }
1007         }
1008
1009         u32 buffer_count = 0;
1010         for (auto &lists : grouped_buffers.lists)
1011                 for (MeshBufList &list : lists)
1012                         buffer_count += list.bufs.size();
1013
1014         draw_order.reserve(draw_order.size() + buffer_count);
1015
1016         // Capture draw order for all solid meshes
1017         for (auto &lists : grouped_buffers.lists) {
1018                 for (MeshBufList &list : lists) {
1019                         // iterate in reverse to draw closest blocks first
1020                         for (auto it = list.bufs.rbegin(); it != list.bufs.rend(); ++it)
1021                                 draw_order.emplace_back(it->first, it->second, it != list.bufs.rbegin());
1022                 }
1023         }
1024
1025         TimeTaker draw("Drawing shadow mesh buffers");
1026
1027         core::matrix4 m; // Model matrix
1028         v3f offset = intToFloat(m_camera_offset, BS);
1029         u32 material_swaps = 0;
1030
1031         // Render all mesh buffers in order
1032         drawcall_count += draw_order.size();
1033
1034         for (auto &descriptor : draw_order) {
1035                 scene::IMeshBuffer *buf = descriptor.getBuffer();
1036
1037                 if (!descriptor.m_reuse_material) {
1038                         // override some material properties
1039                         video::SMaterial local_material = buf->getMaterial();
1040                         local_material.MaterialType = material.MaterialType;
1041                         local_material.BackfaceCulling = material.BackfaceCulling;
1042                         local_material.FrontfaceCulling = material.FrontfaceCulling;
1043                         local_material.BlendOperation = material.BlendOperation;
1044                         local_material.Lighting = false;
1045                         driver->setMaterial(local_material);
1046                         ++material_swaps;
1047                 }
1048
1049                 v3f block_wpos = intToFloat(descriptor.m_pos * MAP_BLOCKSIZE, BS);
1050                 m.setTranslation(block_wpos - offset);
1051
1052                 driver->setTransform(video::ETS_WORLD, m);
1053                 descriptor.draw(driver);
1054                 vertex_count += buf->getIndexCount();
1055         }
1056
1057         // restore the driver material state
1058         video::SMaterial clean;
1059         clean.BlendOperation = video::EBO_ADD;
1060         driver->setMaterial(clean); // reset material to defaults
1061         driver->draw3DLine(v3f(), v3f(), video::SColor(0));
1062
1063         g_profiler->avg(prefix + "draw meshes [ms]", draw.stop(true));
1064         g_profiler->avg(prefix + "vertices drawn [#]", vertex_count);
1065         g_profiler->avg(prefix + "drawcalls [#]", drawcall_count);
1066         g_profiler->avg(prefix + "material swaps [#]", material_swaps);
1067 }
1068
1069 /*
1070         Custom update draw list for the pov of shadow light.
1071 */
1072 void ClientMap::updateDrawListShadow(v3f shadow_light_pos, v3f shadow_light_dir, float radius, float length)
1073 {
1074         ScopeProfiler sp(g_profiler, "CM::updateDrawListShadow()", SPT_AVG);
1075
1076         v3s16 cam_pos_nodes = floatToInt(shadow_light_pos, BS);
1077         v3s16 p_blocks_min;
1078         v3s16 p_blocks_max;
1079         getBlocksInViewRange(cam_pos_nodes, &p_blocks_min, &p_blocks_max, radius + length);
1080
1081         for (auto &i : m_drawlist_shadow) {
1082                 MapBlock *block = i.second;
1083                 block->refDrop();
1084         }
1085         m_drawlist_shadow.clear();
1086
1087         // Number of blocks currently loaded by the client
1088         u32 blocks_loaded = 0;
1089         // Number of blocks with mesh in rendering range
1090         u32 blocks_in_range_with_mesh = 0;
1091         // Number of blocks occlusion culled
1092         u32 blocks_occlusion_culled = 0;
1093
1094         for (auto &sector_it : m_sectors) {
1095                 MapSector *sector = sector_it.second;
1096                 if (!sector)
1097                         continue;
1098                 blocks_loaded += sector->size();
1099
1100                 MapBlockVect sectorblocks;
1101                 sector->getBlocks(sectorblocks);
1102
1103                 /*
1104                         Loop through blocks in sector
1105                 */
1106                 for (MapBlock *block : sectorblocks) {
1107                         if (!block->mesh) {
1108                                 // Ignore if mesh doesn't exist
1109                                 continue;
1110                         }
1111
1112                         v3f block_pos = intToFloat(block->getPos() * MAP_BLOCKSIZE, BS);
1113                         v3f projection = shadow_light_pos + shadow_light_dir * shadow_light_dir.dotProduct(block_pos - shadow_light_pos);
1114                         if (projection.getDistanceFrom(block_pos) > radius)
1115                                 continue;
1116
1117                         blocks_in_range_with_mesh++;
1118
1119                         // This block is in range. Reset usage timer.
1120                         block->resetUsageTimer();
1121
1122                         // Add to set
1123                         if (m_drawlist_shadow.find(block->getPos()) == m_drawlist_shadow.end()) {
1124                                 block->refGrab();
1125                                 m_drawlist_shadow[block->getPos()] = block;
1126                         }
1127                 }
1128         }
1129
1130         g_profiler->avg("SHADOW MapBlock meshes in range [#]", blocks_in_range_with_mesh);
1131         g_profiler->avg("SHADOW MapBlocks occlusion culled [#]", blocks_occlusion_culled);
1132         g_profiler->avg("SHADOW MapBlocks drawn [#]", m_drawlist_shadow.size());
1133         g_profiler->avg("SHADOW MapBlocks loaded [#]", blocks_loaded);
1134 }
1135
1136 void ClientMap::updateTransparentMeshBuffers()
1137 {
1138         ScopeProfiler sp(g_profiler, "CM::updateTransparentMeshBuffers", SPT_AVG);
1139         u32 sorted_blocks = 0;
1140         u32 unsorted_blocks = 0;
1141         f32 sorting_distance_sq = pow(m_cache_transparency_sorting_distance * BS, 2.0f);
1142
1143
1144         // Update the order of transparent mesh buffers in each mesh
1145         for (auto it = m_drawlist.begin(); it != m_drawlist.end(); it++) {
1146                 MapBlock* block = it->second;
1147                 if (!block->mesh)
1148                         continue;
1149
1150                 if (m_needs_update_transparent_meshes ||
1151                                 block->mesh->getTransparentBuffers().size() == 0) {
1152
1153                         v3s16 block_pos = block->getPos();
1154                         v3f block_pos_f = intToFloat(block_pos * MAP_BLOCKSIZE + MAP_BLOCKSIZE / 2, BS);
1155                         f32 distance = m_camera_position.getDistanceFromSQ(block_pos_f);
1156                         if (distance <= sorting_distance_sq) {
1157                                 block->mesh->updateTransparentBuffers(m_camera_position, block_pos);
1158                                 ++sorted_blocks;
1159                         }
1160                         else {
1161                                 block->mesh->consolidateTransparentBuffers();
1162                                 ++unsorted_blocks;
1163                         }
1164                 }
1165         }
1166
1167         g_profiler->avg("CM::Transparent Buffers - Sorted", sorted_blocks);
1168         g_profiler->avg("CM::Transparent Buffers - Unsorted", unsorted_blocks);
1169         m_needs_update_transparent_meshes = false;
1170 }
1171
1172 scene::IMeshBuffer* ClientMap::DrawDescriptor::getBuffer()
1173 {
1174         return m_use_partial_buffer ? m_partial_buffer->getBuffer() : m_buffer;
1175 }
1176
1177 void ClientMap::DrawDescriptor::draw(video::IVideoDriver* driver)
1178 {
1179         if (m_use_partial_buffer) {
1180                 m_partial_buffer->beforeDraw();
1181                 driver->drawMeshBuffer(m_partial_buffer->getBuffer());
1182                 m_partial_buffer->afterDraw();
1183         } else {
1184                 driver->drawMeshBuffer(m_buffer);
1185         }
1186 }