src/clientmap.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "clientmap.h"
  21 #include "client.h"
  22 #include "mapblock_mesh.h"
  23 #include <IMaterialRenderer.h>
  24 #include <matrix4.h>
  25 #include "log.h"
  26 #include "mapsector.h"
  27 #include "nodedef.h"
  28 #include "mapblock.h"
  29 #include "profiler.h"
  30 #include "settings.h"
  31 #include "camera.h"               // CameraModes
  32 #include "util/mathconstants.h"
  33 #include "util/basic_macros.h"
  34 #include <algorithm>
  35
  36 ClientMap::ClientMap(
  37                 Client *client,
  38                 MapDrawControl &control,
  39                 scene::ISceneNode* parent,
  40                 scene::ISceneManager* mgr,
  41                 s32 id
  42 ):
  43         Map(dout_client, client),
  44         scene::ISceneNode(parent, mgr, id),
  45         m_client(client),
  46         m_control(control),
  47         m_camera_position(0,0,0),
  48         m_camera_direction(0,0,1),
  49         m_camera_fov(M_PI)
  50 {
  51         m_box = aabb3f(-BS*1000000,-BS*1000000,-BS*1000000,
  52                         BS*1000000,BS*1000000,BS*1000000);
  53
  54         /* TODO: Add a callback function so these can be updated when a setting
  55          *       changes.  At this point in time it doesn't matter (e.g. /set
  56          *       is documented to change server settings only)
  57          *
  58          * TODO: Local caching of settings is not optimal and should at some stage
  59          *       be updated to use a global settings object for getting thse values
  60          *       (as opposed to the this local caching). This can be addressed in
  61          *       a later release.
  62          */
  63         m_cache_trilinear_filter  = g_settings->getBool("trilinear_filter");
  64         m_cache_bilinear_filter   = g_settings->getBool("bilinear_filter");
  65         m_cache_anistropic_filter = g_settings->getBool("anisotropic_filter");
  66
  67 }
  68
  69 ClientMap::~ClientMap()
  70 {
  71         /*MutexAutoLock lock(mesh_mutex);
  72
  73         if(mesh != NULL)
  74         {
  75                 mesh->drop();
  76                 mesh = NULL;
  77         }*/
  78 }
  79
  80 MapSector * ClientMap::emergeSector(v2s16 p2d)
  81 {
  82         DSTACK(FUNCTION_NAME);
  83         // Check that it doesn't exist already
  84         try{
  85                 return getSectorNoGenerate(p2d);
  86         }
  87         catch(InvalidPositionException &e)
  88         {
  89         }
  90
  91         // Create a sector
  92         ClientMapSector *sector = new ClientMapSector(this, p2d, m_gamedef);
  93
  94         {
  95                 //MutexAutoLock lock(m_sector_mutex); // Bulk comment-out
  96                 m_sectors[p2d] = sector;
  97         }
  98
  99         return sector;
 100 }
 101
 102 void ClientMap::OnRegisterSceneNode()
 103 {
 104         if(IsVisible)
 105         {
 106                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
 107                 SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
 108         }
 109
 110         ISceneNode::OnRegisterSceneNode();
 111 }
 112
 113 static bool isOccluded(Map *map, v3s16 p0, v3s16 p1, float step, float stepfac,
 114                 float start_off, float end_off, u32 needed_count, INodeDefManager *nodemgr)
 115 {
 116         float d0 = (float)BS * p0.getDistanceFrom(p1);
 117         v3s16 u0 = p1 - p0;
 118         v3f uf = v3f(u0.X, u0.Y, u0.Z) * BS;
 119         uf.normalize();
 120         v3f p0f = v3f(p0.X, p0.Y, p0.Z) * BS;
 121         u32 count = 0;
 122         for(float s=start_off; s<d0+end_off; s+=step){
 123                 v3f pf = p0f + uf * s;
 124                 v3s16 p = floatToInt(pf, BS);
 125                 MapNode n = map->getNodeNoEx(p);
 126                 bool is_transparent = false;
 127                 const ContentFeatures &f = nodemgr->get(n);
 128                 if(f.solidness == 0)
 129                         is_transparent = (f.visual_solidness != 2);
 130                 else
 131                         is_transparent = (f.solidness != 2);
 132                 if(!is_transparent){
 133                         count++;
 134                         if(count >= needed_count)
 135                                 return true;
 136                 }
 137                 step *= stepfac;
 138         }
 139         return false;
 140 }
 141
 142 void ClientMap::getBlocksInViewRange(v3s16 cam_pos_nodes,
 143                 v3s16 *p_blocks_min, v3s16 *p_blocks_max)
 144 {
 145         v3s16 box_nodes_d = m_control.wanted_range * v3s16(1, 1, 1);
 146         // Define p_nodes_min/max as v3s32 because 'cam_pos_nodes -/+ box_nodes_d'
 147         // can exceed the range of v3s16 when a large view range is used near the
 148         // world edges.
 149         v3s32 p_nodes_min(
 150                 cam_pos_nodes.X - box_nodes_d.X,
 151                 cam_pos_nodes.Y - box_nodes_d.Y,
 152                 cam_pos_nodes.Z - box_nodes_d.Z);
 153         v3s32 p_nodes_max(
 154                 cam_pos_nodes.X + box_nodes_d.X,
 155                 cam_pos_nodes.Y + box_nodes_d.Y,
 156                 cam_pos_nodes.Z + box_nodes_d.Z);
 157         // Take a fair amount as we will be dropping more out later
 158         // Umm... these additions are a bit strange but they are needed.
 159         *p_blocks_min = v3s16(
 160                         p_nodes_min.X / MAP_BLOCKSIZE - 3,
 161                         p_nodes_min.Y / MAP_BLOCKSIZE - 3,
 162                         p_nodes_min.Z / MAP_BLOCKSIZE - 3);
 163         *p_blocks_max = v3s16(
 164                         p_nodes_max.X / MAP_BLOCKSIZE + 1,
 165                         p_nodes_max.Y / MAP_BLOCKSIZE + 1,
 166                         p_nodes_max.Z / MAP_BLOCKSIZE + 1);
 167 }
 168
 169 void ClientMap::updateDrawList(video::IVideoDriver* driver)
 170 {
 171         ScopeProfiler sp(g_profiler, "CM::updateDrawList()", SPT_AVG);
 172         g_profiler->add("CM::updateDrawList() count", 1);
 173
 174         for (std::map<v3s16, MapBlock*>::iterator i = m_drawlist.begin();
 175                         i != m_drawlist.end(); ++i) {
 176                 MapBlock *block = i->second;
 177                 block->refDrop();
 178         }
 179         m_drawlist.clear();
 180
 181         v3f camera_position = m_camera_position;
 182         v3f camera_direction = m_camera_direction;
 183         f32 camera_fov = m_camera_fov;
 184
 185         // Use a higher fov to accomodate faster camera movements.
 186         // Blocks are cropped better when they are drawn.
 187         // Or maybe they aren't? Well whatever.
 188         camera_fov *= 1.2;
 189
 190         v3s16 cam_pos_nodes = floatToInt(camera_position, BS);
 191         v3s16 p_blocks_min;
 192         v3s16 p_blocks_max;
 193         getBlocksInViewRange(cam_pos_nodes, &p_blocks_min, &p_blocks_max);
 194
 195         // Number of blocks in rendering range
 196         u32 blocks_in_range = 0;
 197         // Number of blocks occlusion culled
 198         u32 blocks_occlusion_culled = 0;
 199         // Number of blocks in rendering range but don't have a mesh
 200         u32 blocks_in_range_without_mesh = 0;
 201         // Blocks that had mesh that would have been drawn according to
 202         // rendering range (if max blocks limit didn't kick in)
 203         u32 blocks_would_have_drawn = 0;
 204         // Blocks that were drawn and had a mesh
 205         u32 blocks_drawn = 0;
 206         // Blocks which had a corresponding meshbuffer for this pass
 207         //u32 blocks_had_pass_meshbuf = 0;
 208         // Blocks from which stuff was actually drawn
 209         //u32 blocks_without_stuff = 0;
 210         // Distance to farthest drawn block
 211         float farthest_drawn = 0;
 212
 213         // No occlusion culling when free_move is on and camera is
 214         // inside ground
 215         bool occlusion_culling_enabled = true;
 216         if (g_settings->getBool("free_move")) {
 217                 MapNode n = getNodeNoEx(cam_pos_nodes);
 218                 if (n.getContent() == CONTENT_IGNORE ||
 219                                 m_nodedef->get(n).solidness == 2)
 220                         occlusion_culling_enabled = false;
 221         }
 222
 223         for (std::map<v2s16, MapSector*>::iterator si = m_sectors.begin();
 224                         si != m_sectors.end(); ++si) {
 225                 MapSector *sector = si->second;
 226                 v2s16 sp = sector->getPos();
 227
 228                 if (m_control.range_all == false) {
 229                         if (sp.X < p_blocks_min.X || sp.X > p_blocks_max.X ||
 230                                         sp.Y < p_blocks_min.Z || sp.Y > p_blocks_max.Z)
 231                                 continue;
 232                 }
 233
 234                 MapBlockVect sectorblocks;
 235                 sector->getBlocks(sectorblocks);
 236
 237                 /*
 238                         Loop through blocks in sector
 239                 */
 240
 241                 u32 sector_blocks_drawn = 0;
 242
 243                 for (MapBlockVect::iterator i = sectorblocks.begin();
 244                                 i != sectorblocks.end(); ++i) {
 245                         MapBlock *block = *i;
 246
 247                         /*
 248                                 Compare block position to camera position, skip
 249                                 if not seen on display
 250                         */
 251
 252                         if (block->mesh != NULL)
 253                                 block->mesh->updateCameraOffset(m_camera_offset);
 254
 255                         float range = 100000 * BS;
 256                         if (m_control.range_all == false)
 257                                 range = m_control.wanted_range * BS;
 258
 259                         float d = 0.0;
 260                         if (!isBlockInSight(block->getPos(), camera_position,
 261                                         camera_direction, camera_fov, range, &d))
 262                                 continue;
 263
 264                         blocks_in_range++;
 265
 266                         /*
 267                                 Ignore if mesh doesn't exist
 268                         */
 269                         if (block->mesh == NULL) {
 270                                 blocks_in_range_without_mesh++;
 271                                 continue;
 272                         }
 273
 274                         /*
 275                                 Occlusion culling
 276                         */
 277                         v3s16 cpn = block->getPos() * MAP_BLOCKSIZE;
 278                         cpn += v3s16(MAP_BLOCKSIZE / 2, MAP_BLOCKSIZE / 2, MAP_BLOCKSIZE / 2);
 279                         float step = BS * 1;
 280                         float stepfac = 1.1;
 281                         float startoff = BS * 1;
 282                         // The occlusion search of 'isOccluded()' must stop short of the target
 283                         // point by distance 'endoff' (end offset) to not enter the target mapblock.
 284                         // For the 8 mapblock corners 'endoff' must therefore be the maximum diagonal
 285                         // of a mapblock, because we must consider all view angles.
 286                         // sqrt(1^2 + 1^2 + 1^2) = 1.732
 287                         float endoff = -BS * MAP_BLOCKSIZE * 1.732050807569;
 288                         v3s16 spn = cam_pos_nodes;
 289                         s16 bs2 = MAP_BLOCKSIZE / 2 + 1;
 290                         // to reduce the likelihood of falsely occluded blocks
 291                         // require at least two solid blocks
 292                         // this is a HACK, we should think of a more precise algorithm
 293                         u32 needed_count = 2;
 294                         if (occlusion_culling_enabled &&
 295                                         // For the central point of the mapblock 'endoff' can be halved
 296                                         isOccluded(this, spn, cpn,
 297                                                 step, stepfac, startoff, endoff / 2.0f, needed_count, m_nodedef) &&
 298                                         isOccluded(this, spn, cpn + v3s16(bs2,bs2,bs2),
 299                                                 step, stepfac, startoff, endoff, needed_count, m_nodedef) &&
 300                                         isOccluded(this, spn, cpn + v3s16(bs2,bs2,-bs2),
 301                                                 step, stepfac, startoff, endoff, needed_count, m_nodedef) &&
 302                                         isOccluded(this, spn, cpn + v3s16(bs2,-bs2,bs2),
 303                                                 step, stepfac, startoff, endoff, needed_count, m_nodedef) &&
 304                                         isOccluded(this, spn, cpn + v3s16(bs2,-bs2,-bs2),
 305                                                 step, stepfac, startoff, endoff, needed_count, m_nodedef) &&
 306                                         isOccluded(this, spn, cpn + v3s16(-bs2,bs2,bs2),
 307                                                 step, stepfac, startoff, endoff, needed_count, m_nodedef) &&
 308                                         isOccluded(this, spn, cpn + v3s16(-bs2,bs2,-bs2),
 309                                                 step, stepfac, startoff, endoff, needed_count, m_nodedef) &&
 310                                         isOccluded(this, spn, cpn + v3s16(-bs2,-bs2,bs2),
 311                                                 step, stepfac, startoff, endoff, needed_count, m_nodedef) &&
 312                                         isOccluded(this, spn, cpn + v3s16(-bs2,-bs2,-bs2),
 313                                                 step, stepfac, startoff, endoff, needed_count, m_nodedef)) {
 314                                 blocks_occlusion_culled++;
 315                                 continue;
 316                         }
 317
 318                         // This block is in range. Reset usage timer.
 319                         block->resetUsageTimer();
 320
 321                         // Limit block count in case of a sudden increase
 322                         blocks_would_have_drawn++;
 323                         if (blocks_drawn >= m_control.wanted_max_blocks &&
 324                                         !m_control.range_all &&
 325                                         d > m_control.wanted_range * BS)
 326                                 continue;
 327
 328                         // Add to set
 329                         block->refGrab();
 330                         m_drawlist[block->getPos()] = block;
 331
 332                         sector_blocks_drawn++;
 333                         blocks_drawn++;
 334                         if (d / BS > farthest_drawn)
 335                                 farthest_drawn = d / BS;
 336
 337                 } // foreach sectorblocks
 338
 339                 if (sector_blocks_drawn != 0)
 340                         m_last_drawn_sectors.insert(sp);
 341         }
 342
 343         m_control.blocks_would_have_drawn = blocks_would_have_drawn;
 344         m_control.blocks_drawn = blocks_drawn;
 345         m_control.farthest_drawn = farthest_drawn;
 346
 347         g_profiler->avg("CM: blocks in range", blocks_in_range);
 348         g_profiler->avg("CM: blocks occlusion culled", blocks_occlusion_culled);
 349         if (blocks_in_range != 0)
 350                 g_profiler->avg("CM: blocks in range without mesh (frac)",
 351                                 (float)blocks_in_range_without_mesh / blocks_in_range);
 352         g_profiler->avg("CM: blocks drawn", blocks_drawn);
 353         g_profiler->avg("CM: farthest drawn", farthest_drawn);
 354         g_profiler->avg("CM: wanted max blocks", m_control.wanted_max_blocks);
 355 }
 356
 357 struct MeshBufList
 358 {
 359         video::SMaterial m;
 360         std::vector<scene::IMeshBuffer*> bufs;
 361 };
 362
 363 struct MeshBufListList
 364 {
 365         std::vector<MeshBufList> lists;
 366
 367         void clear()
 368         {
 369                 lists.clear();
 370         }
 371
 372         void add(scene::IMeshBuffer *buf)
 373         {
 374                 for(std::vector<MeshBufList>::iterator i = lists.begin();
 375                                 i != lists.end(); ++i){
 376                         MeshBufList &l = *i;
 377                         video::SMaterial &m = buf->getMaterial();
 378
 379                         // comparing a full material is quite expensive so we don't do it if
 380                         // not even first texture is equal
 381                         if (l.m.TextureLayer[0].Texture != m.TextureLayer[0].Texture)
 382                                 continue;
 383
 384                         if (l.m == m) {
 385                                 l.bufs.push_back(buf);
 386                                 return;
 387                         }
 388                 }
 389                 MeshBufList l;
 390                 l.m = buf->getMaterial();
 391                 l.bufs.push_back(buf);
 392                 lists.push_back(l);
 393         }
 394 };
 395
 396 void ClientMap::renderMap(video::IVideoDriver* driver, s32 pass)
 397 {
 398         DSTACK(FUNCTION_NAME);
 399
 400         bool is_transparent_pass = pass == scene::ESNRP_TRANSPARENT;
 401
 402         std::string prefix;
 403         if (pass == scene::ESNRP_SOLID)
 404                 prefix = "CM: solid: ";
 405         else
 406                 prefix = "CM: transparent: ";
 407
 408         /*
 409                 This is called two times per frame, reset on the non-transparent one
 410         */
 411         if (pass == scene::ESNRP_SOLID)
 412                 m_last_drawn_sectors.clear();
 413
 414         /*
 415                 Get time for measuring timeout.
 416
 417                 Measuring time is very useful for long delays when the
 418                 machine is swapping a lot.
 419         */
 420         int time1 = time(0);
 421
 422         /*
 423                 Get animation parameters
 424         */
 425         float animation_time = m_client->getAnimationTime();
 426         int crack = m_client->getCrackLevel();
 427         u32 daynight_ratio = m_client->getEnv().getDayNightRatio();
 428
 429         v3f camera_position = m_camera_position;
 430         v3f camera_direction = m_camera_direction;
 431         f32 camera_fov = m_camera_fov;
 432
 433         /*
 434                 Get all blocks and draw all visible ones
 435         */
 436
 437         u32 vertex_count = 0;
 438         u32 meshbuffer_count = 0;
 439
 440         // For limiting number of mesh animations per frame
 441         u32 mesh_animate_count = 0;
 442         u32 mesh_animate_count_far = 0;
 443
 444         // Blocks that were drawn and had a mesh
 445         u32 blocks_drawn = 0;
 446         // Blocks which had a corresponding meshbuffer for this pass
 447         u32 blocks_had_pass_meshbuf = 0;
 448         // Blocks from which stuff was actually drawn
 449         u32 blocks_without_stuff = 0;
 450
 451         /*
 452                 Draw the selected MapBlocks
 453         */
 454
 455         {
 456         ScopeProfiler sp(g_profiler, prefix + "drawing blocks", SPT_AVG);
 457
 458         MeshBufListList drawbufs;
 459
 460         for (std::map<v3s16, MapBlock*>::iterator i = m_drawlist.begin();
 461                         i != m_drawlist.end(); ++i) {
 462                 MapBlock *block = i->second;
 463
 464                 // If the mesh of the block happened to get deleted, ignore it
 465                 if (block->mesh == NULL)
 466                         continue;
 467
 468                 float d = 0.0;
 469                 if (!isBlockInSight(block->getPos(), camera_position,
 470                                 camera_direction, camera_fov, 100000 * BS, &d))
 471                         continue;
 472
 473                 // Mesh animation
 474                 {
 475                         //MutexAutoLock lock(block->mesh_mutex);
 476                         MapBlockMesh *mapBlockMesh = block->mesh;
 477                         assert(mapBlockMesh);
 478                         // Pretty random but this should work somewhat nicely
 479                         bool faraway = d >= BS * 50;
 480                         //bool faraway = d >= m_control.wanted_range * BS;
 481                         if (mapBlockMesh->isAnimationForced() || !faraway ||
 482                                         mesh_animate_count_far < (m_control.range_all ? 200 : 50)) {
 483                                 bool animated = mapBlockMesh->animate(faraway, animation_time,
 484                                         crack, daynight_ratio);
 485                                 if (animated)
 486                                         mesh_animate_count++;
 487                                 if (animated && faraway)
 488                                         mesh_animate_count_far++;
 489                         } else {
 490                                 mapBlockMesh->decreaseAnimationForceTimer();
 491                         }
 492                 }
 493
 494                 /*
 495                         Get the meshbuffers of the block
 496                 */
 497                 {
 498                         //MutexAutoLock lock(block->mesh_mutex);
 499
 500                         MapBlockMesh *mapBlockMesh = block->mesh;
 501                         assert(mapBlockMesh);
 502
 503                         scene::IMesh *mesh = mapBlockMesh->getMesh();
 504                         assert(mesh);
 505
 506                         u32 c = mesh->getMeshBufferCount();
 507                         for (u32 i = 0; i < c; i++)
 508                         {
 509                                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 510
 511                                 buf->getMaterial().setFlag(video::EMF_TRILINEAR_FILTER, m_cache_trilinear_filter);
 512                                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, m_cache_bilinear_filter);
 513                                 buf->getMaterial().setFlag(video::EMF_ANISOTROPIC_FILTER, m_cache_anistropic_filter);
 514                                 buf->getMaterial().setFlag(video::EMF_WIREFRAME, m_control.show_wireframe);
 515
 516                                 const video::SMaterial& material = buf->getMaterial();
 517                                 video::IMaterialRenderer* rnd =
 518                                                 driver->getMaterialRenderer(material.MaterialType);
 519                                 bool transparent = (rnd && rnd->isTransparent());
 520                                 if (transparent == is_transparent_pass) {
 521                                         if (buf->getVertexCount() == 0)
 522                                                 errorstream << "Block [" << analyze_block(block)
 523                                                          << "] contains an empty meshbuf" << std::endl;
 524                                         drawbufs.add(buf);
 525                                 }
 526                         }
 527                 }
 528         }
 529
 530         std::vector<MeshBufList> &lists = drawbufs.lists;
 531
 532         int timecheck_counter = 0;
 533         for (std::vector<MeshBufList>::iterator i = lists.begin();
 534                         i != lists.end(); ++i) {
 535                 timecheck_counter++;
 536                 if (timecheck_counter > 50) {
 537                         timecheck_counter = 0;
 538                         int time2 = time(0);
 539                         if (time2 > time1 + 4) {
 540                                 infostream << "ClientMap::renderMap(): "
 541                                         "Rendering takes ages, returning."
 542                                         << std::endl;
 543                                 return;
 544                         }
 545                 }
 546
 547                 MeshBufList &list = *i;
 548
 549                 driver->setMaterial(list.m);
 550
 551                 for (std::vector<scene::IMeshBuffer*>::iterator j = list.bufs.begin();
 552                                 j != list.bufs.end(); ++j) {
 553                         scene::IMeshBuffer *buf = *j;
 554                         driver->drawMeshBuffer(buf);
 555                         vertex_count += buf->getVertexCount();
 556                         meshbuffer_count++;
 557                 }
 558
 559         }
 560         } // ScopeProfiler
 561
 562         // Log only on solid pass because values are the same
 563         if (pass == scene::ESNRP_SOLID) {
 564                 g_profiler->avg("CM: animated meshes", mesh_animate_count);
 565                 g_profiler->avg("CM: animated meshes (far)", mesh_animate_count_far);
 566         }
 567
 568         g_profiler->avg(prefix + "vertices drawn", vertex_count);
 569         if (blocks_had_pass_meshbuf != 0)
 570                 g_profiler->avg(prefix + "meshbuffers per block",
 571                         (float)meshbuffer_count / (float)blocks_had_pass_meshbuf);
 572         if (blocks_drawn != 0)
 573                 g_profiler->avg(prefix + "empty blocks (frac)",
 574                         (float)blocks_without_stuff / blocks_drawn);
 575
 576         /*infostream<<"renderMap(): is_transparent_pass="<<is_transparent_pass
 577                         <<", rendered "<<vertex_count<<" vertices."<<std::endl;*/
 578 }
 579
 580 static bool getVisibleBrightness(Map *map, v3f p0, v3f dir, float step,
 581                 float step_multiplier, float start_distance, float end_distance,
 582                 INodeDefManager *ndef, u32 daylight_factor, float sunlight_min_d,
 583                 int *result, bool *sunlight_seen)
 584 {
 585         int brightness_sum = 0;
 586         int brightness_count = 0;
 587         float distance = start_distance;
 588         dir.normalize();
 589         v3f pf = p0;
 590         pf += dir * distance;
 591         int noncount = 0;
 592         bool nonlight_seen = false;
 593         bool allow_allowing_non_sunlight_propagates = false;
 594         bool allow_non_sunlight_propagates = false;
 595         // Check content nearly at camera position
 596         {
 597                 v3s16 p = floatToInt(p0 /*+ dir * 3*BS*/, BS);
 598                 MapNode n = map->getNodeNoEx(p);
 599                 if(ndef->get(n).param_type == CPT_LIGHT &&
 600                                 !ndef->get(n).sunlight_propagates)
 601                         allow_allowing_non_sunlight_propagates = true;
 602         }
 603         // If would start at CONTENT_IGNORE, start closer
 604         {
 605                 v3s16 p = floatToInt(pf, BS);
 606                 MapNode n = map->getNodeNoEx(p);
 607                 if(n.getContent() == CONTENT_IGNORE){
 608                         float newd = 2*BS;
 609                         pf = p0 + dir * 2*newd;
 610                         distance = newd;
 611                         sunlight_min_d = 0;
 612                 }
 613         }
 614         for(int i=0; distance < end_distance; i++){
 615                 pf += dir * step;
 616                 distance += step;
 617                 step *= step_multiplier;
 618
 619                 v3s16 p = floatToInt(pf, BS);
 620                 MapNode n = map->getNodeNoEx(p);
 621                 if(allow_allowing_non_sunlight_propagates && i == 0 &&
 622                                 ndef->get(n).param_type == CPT_LIGHT &&
 623                                 !ndef->get(n).sunlight_propagates){
 624                         allow_non_sunlight_propagates = true;
 625                 }
 626                 if(ndef->get(n).param_type != CPT_LIGHT ||
 627                                 (!ndef->get(n).sunlight_propagates &&
 628                                         !allow_non_sunlight_propagates)){
 629                         nonlight_seen = true;
 630                         noncount++;
 631                         if(noncount >= 4)
 632                                 break;
 633                         continue;
 634                 }
 635                 if(distance >= sunlight_min_d && *sunlight_seen == false
 636                                 && nonlight_seen == false)
 637                         if(n.getLight(LIGHTBANK_DAY, ndef) == LIGHT_SUN)
 638                                 *sunlight_seen = true;
 639                 noncount = 0;
 640                 brightness_sum += decode_light(n.getLightBlend(daylight_factor, ndef));
 641                 brightness_count++;
 642         }
 643         *result = 0;
 644         if(brightness_count == 0)
 645                 return false;
 646         *result = brightness_sum / brightness_count;
 647         /*std::cerr<<"Sampled "<<brightness_count<<" points; result="
 648                         <<(*result)<<std::endl;*/
 649         return true;
 650 }
 651
 652 int ClientMap::getBackgroundBrightness(float max_d, u32 daylight_factor,
 653                 int oldvalue, bool *sunlight_seen_result)
 654 {
 655         const bool debugprint = false;
 656         static v3f z_directions[50] = {
 657                 v3f(-100, 0, 0)
 658         };
 659         static f32 z_offsets[sizeof(z_directions)/sizeof(*z_directions)] = {
 660                 -1000,
 661         };
 662         if(z_directions[0].X < -99){
 663                 for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 664                         z_directions[i] = v3f(
 665                                 0.01 * myrand_range(-100, 100),
 666                                 1.0,
 667                                 0.01 * myrand_range(-100, 100)
 668                         );
 669                         z_offsets[i] = 0.01 * myrand_range(0,100);
 670                 }
 671         }
 672         if(debugprint)
 673                 std::cerr<<"In goes "<<PP(m_camera_direction)<<", out comes ";
 674         int sunlight_seen_count = 0;
 675         float sunlight_min_d = max_d*0.8;
 676         if(sunlight_min_d > 35*BS)
 677                 sunlight_min_d = 35*BS;
 678         std::vector<int> values;
 679         for(u32 i=0; i<sizeof(z_directions)/sizeof(*z_directions); i++){
 680                 v3f z_dir = z_directions[i];
 681                 z_dir.normalize();
 682                 core::CMatrix4<f32> a;
 683                 a.buildRotateFromTo(v3f(0,1,0), z_dir);
 684                 v3f dir = m_camera_direction;
 685                 a.rotateVect(dir);
 686                 int br = 0;
 687                 float step = BS*1.5;
 688                 if(max_d > 35*BS)
 689                         step = max_d / 35 * 1.5;
 690                 float off = step * z_offsets[i];
 691                 bool sunlight_seen_now = false;
 692                 bool ok = getVisibleBrightness(this, m_camera_position, dir,
 693                                 step, 1.0, max_d*0.6+off, max_d, m_nodedef, daylight_factor,
 694                                 sunlight_min_d,
 695                                 &br, &sunlight_seen_now);
 696                 if(sunlight_seen_now)
 697                         sunlight_seen_count++;
 698                 if(!ok)
 699                         continue;
 700                 values.push_back(br);
 701                 // Don't try too much if being in the sun is clear
 702                 if(sunlight_seen_count >= 20)
 703                         break;
 704         }
 705         int brightness_sum = 0;
 706         int brightness_count = 0;
 707         std::sort(values.begin(), values.end());
 708         u32 num_values_to_use = values.size();
 709         if(num_values_to_use >= 10)
 710                 num_values_to_use -= num_values_to_use/2;
 711         else if(num_values_to_use >= 7)
 712                 num_values_to_use -= num_values_to_use/3;
 713         u32 first_value_i = (values.size() - num_values_to_use) / 2;
 714         if(debugprint){
 715                 for(u32 i=0; i < first_value_i; i++)
 716                         std::cerr<<values[i]<<" ";
 717                 std::cerr<<"[";
 718         }
 719         for(u32 i=first_value_i; i < first_value_i+num_values_to_use; i++){
 720                 if(debugprint)
 721                         std::cerr<<values[i]<<" ";
 722                 brightness_sum += values[i];
 723                 brightness_count++;
 724         }
 725         if(debugprint){
 726                 std::cerr<<"]";
 727                 for(u32 i=first_value_i+num_values_to_use; i < values.size(); i++)
 728                         std::cerr<<values[i]<<" ";
 729         }
 730         int ret = 0;
 731         if(brightness_count == 0){
 732                 MapNode n = getNodeNoEx(floatToInt(m_camera_position, BS));
 733                 if(m_nodedef->get(n).param_type == CPT_LIGHT){
 734                         ret = decode_light(n.getLightBlend(daylight_factor, m_nodedef));
 735                 } else {
 736                         ret = oldvalue;
 737                 }
 738         } else {
 739                 /*float pre = (float)brightness_sum / (float)brightness_count;
 740                 float tmp = pre;
 741                 const float d = 0.2;
 742                 pre *= 1.0 + d*2;
 743                 pre -= tmp * d;
 744                 int preint = pre;
 745                 ret = MYMAX(0, MYMIN(255, preint));*/
 746                 ret = brightness_sum / brightness_count;
 747         }
 748         if(debugprint)
 749                 std::cerr<<"Result: "<<ret<<" sunlight_seen_count="
 750                                 <<sunlight_seen_count<<std::endl;
 751         *sunlight_seen_result = (sunlight_seen_count > 0);
 752         return ret;
 753 }
 754
 755 void ClientMap::renderPostFx(CameraMode cam_mode)
 756 {
 757         // Sadly ISceneManager has no "post effects" render pass, in that case we
 758         // could just register for that and handle it in renderMap().
 759
 760         MapNode n = getNodeNoEx(floatToInt(m_camera_position, BS));
 761
 762         // - If the player is in a solid node, make everything black.
 763         // - If the player is in liquid, draw a semi-transparent overlay.
 764         // - Do not if player is in third person mode
 765         const ContentFeatures& features = m_nodedef->get(n);
 766         video::SColor post_effect_color = features.post_effect_color;
 767         if(features.solidness == 2 && !(g_settings->getBool("noclip") &&
 768                         m_client->checkLocalPrivilege("noclip")) &&
 769                         cam_mode == CAMERA_MODE_FIRST)
 770         {
 771                 post_effect_color = video::SColor(255, 0, 0, 0);
 772         }
 773         if (post_effect_color.getAlpha() != 0)
 774         {
 775                 // Draw a full-screen rectangle
 776                 video::IVideoDriver* driver = SceneManager->getVideoDriver();
 777                 v2u32 ss = driver->getScreenSize();
 778                 core::rect<s32> rect(0,0, ss.X, ss.Y);
 779                 driver->draw2DRectangle(post_effect_color, rect);
 780         }
 781 }
 782
 783 void ClientMap::PrintInfo(std::ostream &out)
 784 {
 785         out<<"ClientMap: ";
 786 }
 787
 788