src/minimap.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2015 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 "minimap.h"
  21 #include "threading/mutex_auto_lock.h"
  22 #include "threading/semaphore.h"
  23 #include "clientmap.h"
  24 #include "settings.h"
  25 #include "nodedef.h"
  26 #include "porting.h"
  27 #include "util/numeric.h"
  28 #include "util/string.h"
  29 #include <math.h>
  30
  31
  32 ////
  33 //// MinimapUpdateThread
  34 ////
  35
  36 MinimapUpdateThread::~MinimapUpdateThread()
  37 {
  38         for (std::map<v3s16, MinimapMapblock *>::iterator
  39                         it = m_blocks_cache.begin();
  40                         it != m_blocks_cache.end(); ++it) {
  41                 delete it->second;
  42         }
  43
  44         for (std::deque<QueuedMinimapUpdate>::iterator
  45                         it = m_update_queue.begin();
  46                         it != m_update_queue.end(); ++it) {
  47                 QueuedMinimapUpdate &q = *it;
  48                 delete q.data;
  49         }
  50 }
  51
  52 bool MinimapUpdateThread::pushBlockUpdate(v3s16 pos, MinimapMapblock *data)
  53 {
  54         MutexAutoLock lock(m_queue_mutex);
  55
  56         // Find if block is already in queue.
  57         // If it is, update the data and quit.
  58         for (std::deque<QueuedMinimapUpdate>::iterator
  59                         it = m_update_queue.begin();
  60                         it != m_update_queue.end(); ++it) {
  61                 QueuedMinimapUpdate &q = *it;
  62                 if (q.pos == pos) {
  63                         delete q.data;
  64                         q.data = data;
  65                         return false;
  66                 }
  67         }
  68
  69         // Add the block
  70         QueuedMinimapUpdate q;
  71         q.pos  = pos;
  72         q.data = data;
  73         m_update_queue.push_back(q);
  74
  75         return true;
  76 }
  77
  78 bool MinimapUpdateThread::popBlockUpdate(QueuedMinimapUpdate *update)
  79 {
  80         MutexAutoLock lock(m_queue_mutex);
  81
  82         if (m_update_queue.empty())
  83                 return false;
  84
  85         *update = m_update_queue.front();
  86         m_update_queue.pop_front();
  87
  88         return true;
  89 }
  90
  91 void MinimapUpdateThread::enqueueBlock(v3s16 pos, MinimapMapblock *data)
  92 {
  93         pushBlockUpdate(pos, data);
  94         deferUpdate();
  95 }
  96
  97
  98 void MinimapUpdateThread::doUpdate()
  99 {
 100         QueuedMinimapUpdate update;
 101
 102         while (popBlockUpdate(&update)) {
 103                 if (update.data) {
 104                         // Swap two values in the map using single lookup
 105                         std::pair<std::map<v3s16, MinimapMapblock*>::iterator, bool>
 106                             result = m_blocks_cache.insert(std::make_pair(update.pos, update.data));
 107                         if (result.second == false) {
 108                                 delete result.first->second;
 109                                 result.first->second = update.data;
 110                         }
 111                 } else {
 112                         std::map<v3s16, MinimapMapblock *>::iterator it;
 113                         it = m_blocks_cache.find(update.pos);
 114                         if (it != m_blocks_cache.end()) {
 115                                 delete it->second;
 116                                 m_blocks_cache.erase(it);
 117                         }
 118                 }
 119         }
 120
 121         if (data->map_invalidated && data->mode != MINIMAP_MODE_OFF) {
 122                 getMap(data->pos, data->map_size, data->scan_height, data->is_radar);
 123                 data->map_invalidated = false;
 124         }
 125 }
 126
 127 MinimapPixel *MinimapUpdateThread::getMinimapPixel(v3s16 pos,
 128         s16 scan_height, s16 *pixel_height)
 129 {
 130         s16 height = scan_height - MAP_BLOCKSIZE;
 131         v3s16 blockpos_max, blockpos_min, relpos;
 132
 133         getNodeBlockPosWithOffset(
 134                 v3s16(pos.X, pos.Y - scan_height / 2, pos.Z),
 135                 blockpos_min, relpos);
 136         getNodeBlockPosWithOffset(
 137                 v3s16(pos.X, pos.Y + scan_height / 2, pos.Z),
 138                 blockpos_max, relpos);
 139
 140         for (s16 i = blockpos_max.Y; i > blockpos_min.Y - 1; i--) {
 141                 std::map<v3s16, MinimapMapblock *>::iterator it =
 142                         m_blocks_cache.find(v3s16(blockpos_max.X, i, blockpos_max.Z));
 143                 if (it != m_blocks_cache.end()) {
 144                         MinimapMapblock *mmblock = it->second;
 145                         MinimapPixel *pixel = &mmblock->data[relpos.Z * MAP_BLOCKSIZE + relpos.X];
 146                         if (pixel->id != CONTENT_AIR) {
 147                                 *pixel_height = height + pixel->height;
 148                                 return pixel;
 149                         }
 150                 }
 151
 152                 height -= MAP_BLOCKSIZE;
 153         }
 154
 155         return NULL;
 156 }
 157
 158 s16 MinimapUpdateThread::getAirCount(v3s16 pos, s16 height)
 159 {
 160         s16 air_count = 0;
 161         v3s16 blockpos_max, blockpos_min, relpos;
 162
 163         getNodeBlockPosWithOffset(
 164                 v3s16(pos.X, pos.Y - height / 2, pos.Z),
 165                 blockpos_min, relpos);
 166         getNodeBlockPosWithOffset(
 167                 v3s16(pos.X, pos.Y + height / 2, pos.Z),
 168                 blockpos_max, relpos);
 169
 170         for (s16 i = blockpos_max.Y; i > blockpos_min.Y - 1; i--) {
 171                 std::map<v3s16, MinimapMapblock *>::iterator it =
 172                         m_blocks_cache.find(v3s16(blockpos_max.X, i, blockpos_max.Z));
 173                 if (it != m_blocks_cache.end()) {
 174                         MinimapMapblock *mmblock = it->second;
 175                         MinimapPixel *pixel = &mmblock->data[relpos.Z * MAP_BLOCKSIZE + relpos.X];
 176                         air_count += pixel->air_count;
 177                 }
 178         }
 179
 180         return air_count;
 181 }
 182
 183 void MinimapUpdateThread::getMap(v3s16 pos, s16 size, s16 height, bool is_radar)
 184 {
 185         v3s16 p = v3s16(pos.X - size / 2, pos.Y, pos.Z - size / 2);
 186
 187         for (s16 x = 0; x < size; x++)
 188         for (s16 z = 0; z < size; z++) {
 189                 u16 id = CONTENT_AIR;
 190                 MinimapPixel *mmpixel = &data->minimap_scan[x + z * size];
 191
 192                 if (!is_radar) {
 193                         s16 pixel_height = 0;
 194                         MinimapPixel *cached_pixel =
 195                                 getMinimapPixel(v3s16(p.X + x, p.Y, p.Z + z), height, &pixel_height);
 196                         if (cached_pixel) {
 197                                 id = cached_pixel->id;
 198                                 mmpixel->height = pixel_height;
 199                         }
 200                 } else {
 201                         mmpixel->air_count = getAirCount(v3s16(p.X + x, p.Y, p.Z + z), height);
 202                 }
 203
 204                 mmpixel->id = id;
 205         }
 206 }
 207
 208 ////
 209 //// Mapper
 210 ////
 211
 212 Mapper::Mapper(IrrlichtDevice *device, Client *client)
 213 {
 214         this->driver    = device->getVideoDriver();
 215         this->m_tsrc    = client->getTextureSource();
 216         this->m_shdrsrc = client->getShaderSource();
 217         this->m_ndef    = client->getNodeDefManager();
 218
 219         m_angle = 0.f;
 220
 221         // Initialize static settings
 222         m_enable_shaders = g_settings->getBool("enable_shaders");
 223         m_surface_mode_scan_height =
 224                 g_settings->getBool("minimap_double_scan_height") ? 256 : 128;
 225
 226         // Initialize minimap data
 227         data = new MinimapData;
 228         data->mode              = MINIMAP_MODE_OFF;
 229         data->is_radar          = false;
 230         data->map_invalidated   = true;
 231         data->heightmap_image   = NULL;
 232         data->minimap_image     = NULL;
 233         data->texture           = NULL;
 234         data->heightmap_texture = NULL;
 235         data->minimap_shape_round = g_settings->getBool("minimap_shape_round");
 236
 237         // Get round minimap textures
 238         data->minimap_mask_round = driver->createImage(
 239                 m_tsrc->getTexture("minimap_mask_round.png"),
 240                 core::position2d<s32>(0, 0),
 241                 core::dimension2d<u32>(MINIMAP_MAX_SX, MINIMAP_MAX_SY));
 242         data->minimap_overlay_round = m_tsrc->getTexture("minimap_overlay_round.png");
 243
 244         // Get square minimap textures
 245         data->minimap_mask_square = driver->createImage(
 246                 m_tsrc->getTexture("minimap_mask_square.png"),
 247                 core::position2d<s32>(0, 0),
 248                 core::dimension2d<u32>(MINIMAP_MAX_SX, MINIMAP_MAX_SY));
 249         data->minimap_overlay_square = m_tsrc->getTexture("minimap_overlay_square.png");
 250
 251         // Create player marker texture
 252         data->player_marker = m_tsrc->getTexture("player_marker.png");
 253
 254         // Create mesh buffer for minimap
 255         m_meshbuffer = getMinimapMeshBuffer();
 256
 257         // Initialize and start thread
 258         m_minimap_update_thread = new MinimapUpdateThread();
 259         m_minimap_update_thread->data = data;
 260         m_minimap_update_thread->start();
 261 }
 262
 263 Mapper::~Mapper()
 264 {
 265         m_minimap_update_thread->stop();
 266         m_minimap_update_thread->wait();
 267
 268         m_meshbuffer->drop();
 269
 270         data->minimap_mask_round->drop();
 271         data->minimap_mask_square->drop();
 272
 273         driver->removeTexture(data->texture);
 274         driver->removeTexture(data->heightmap_texture);
 275         driver->removeTexture(data->minimap_overlay_round);
 276         driver->removeTexture(data->minimap_overlay_square);
 277
 278         delete data;
 279         delete m_minimap_update_thread;
 280 }
 281
 282 void Mapper::addBlock(v3s16 pos, MinimapMapblock *data)
 283 {
 284         m_minimap_update_thread->enqueueBlock(pos, data);
 285 }
 286
 287 MinimapMode Mapper::getMinimapMode()
 288 {
 289         return data->mode;
 290 }
 291
 292 void Mapper::toggleMinimapShape()
 293 {
 294         MutexAutoLock lock(m_mutex);
 295
 296         data->minimap_shape_round = !data->minimap_shape_round;
 297         g_settings->setBool("minimap_shape_round", data->minimap_shape_round);
 298         m_minimap_update_thread->deferUpdate();
 299 }
 300
 301 void Mapper::setMinimapMode(MinimapMode mode)
 302 {
 303         static const MinimapModeDef modedefs[MINIMAP_MODE_COUNT] = {
 304                 {false, 0, 0},
 305                 {false, m_surface_mode_scan_height, 256},
 306                 {false, m_surface_mode_scan_height, 128},
 307                 {false, m_surface_mode_scan_height, 64},
 308                 {true, 32, 128},
 309                 {true, 32, 64},
 310                 {true, 32, 32}
 311         };
 312
 313         if (mode >= MINIMAP_MODE_COUNT)
 314                 return;
 315
 316         MutexAutoLock lock(m_mutex);
 317
 318         data->is_radar    = modedefs[mode].is_radar;
 319         data->scan_height = modedefs[mode].scan_height;
 320         data->map_size    = modedefs[mode].map_size;
 321         data->mode        = mode;
 322
 323         m_minimap_update_thread->deferUpdate();
 324 }
 325
 326 void Mapper::setPos(v3s16 pos)
 327 {
 328         bool do_update = false;
 329
 330         {
 331                 MutexAutoLock lock(m_mutex);
 332
 333                 if (pos != data->old_pos) {
 334                         data->old_pos = data->pos;
 335                         data->pos = pos;
 336                         do_update = true;
 337                 }
 338         }
 339
 340         if (do_update)
 341                 m_minimap_update_thread->deferUpdate();
 342 }
 343
 344 void Mapper::setAngle(f32 angle)
 345 {
 346         m_angle = angle;
 347 }
 348
 349 void Mapper::blitMinimapPixelsToImageRadar(video::IImage *map_image)
 350 {
 351         for (s16 x = 0; x < data->map_size; x++)
 352         for (s16 z = 0; z < data->map_size; z++) {
 353                 MinimapPixel *mmpixel = &data->minimap_scan[x + z * data->map_size];
 354
 355                 video::SColor c(240, 0, 0, 0);
 356                 if (mmpixel->air_count > 0)
 357                         c.setGreen(core::clamp(core::round32(32 + mmpixel->air_count * 8), 0, 255));
 358
 359                 map_image->setPixel(x, data->map_size - z - 1, c);
 360         }
 361 }
 362
 363 void Mapper::blitMinimapPixelsToImageSurface(
 364         video::IImage *map_image, video::IImage *heightmap_image)
 365 {
 366         for (s16 x = 0; x < data->map_size; x++)
 367         for (s16 z = 0; z < data->map_size; z++) {
 368                 MinimapPixel *mmpixel = &data->minimap_scan[x + z * data->map_size];
 369
 370                 video::SColor c = m_ndef->get(mmpixel->id).minimap_color;
 371                 c.setAlpha(240);
 372
 373                 map_image->setPixel(x, data->map_size - z - 1, c);
 374
 375                 u32 h = mmpixel->height;
 376                 heightmap_image->setPixel(x,data->map_size - z - 1,
 377                         video::SColor(255, h, h, h));
 378         }
 379 }
 380
 381 video::ITexture *Mapper::getMinimapTexture()
 382 {
 383         // update minimap textures when new scan is ready
 384         if (data->map_invalidated)
 385                 return data->texture;
 386
 387         // create minimap and heightmap images in memory
 388         core::dimension2d<u32> dim(data->map_size, data->map_size);
 389         video::IImage *map_image       = driver->createImage(video::ECF_A8R8G8B8, dim);
 390         video::IImage *heightmap_image = driver->createImage(video::ECF_A8R8G8B8, dim);
 391         video::IImage *minimap_image   = driver->createImage(video::ECF_A8R8G8B8,
 392                 core::dimension2d<u32>(MINIMAP_MAX_SX, MINIMAP_MAX_SY));
 393
 394         // Blit MinimapPixels to images
 395         if (data->is_radar)
 396                 blitMinimapPixelsToImageRadar(map_image);
 397         else
 398                 blitMinimapPixelsToImageSurface(map_image, heightmap_image);
 399
 400         map_image->copyToScaling(minimap_image);
 401         map_image->drop();
 402
 403         video::IImage *minimap_mask = data->minimap_shape_round ?
 404                 data->minimap_mask_round : data->minimap_mask_square;
 405
 406         if (minimap_mask) {
 407                 for (s16 y = 0; y < MINIMAP_MAX_SY; y++)
 408                 for (s16 x = 0; x < MINIMAP_MAX_SX; x++) {
 409                         video::SColor mask_col = minimap_mask->getPixel(x, y);
 410                         if (!mask_col.getAlpha())
 411                                 minimap_image->setPixel(x, y, video::SColor(0,0,0,0));
 412                 }
 413         }
 414
 415         if (data->texture)
 416                 driver->removeTexture(data->texture);
 417         if (data->heightmap_texture)
 418                 driver->removeTexture(data->heightmap_texture);
 419
 420         data->texture = driver->addTexture("minimap__", minimap_image);
 421         data->heightmap_texture =
 422                 driver->addTexture("minimap_heightmap__", heightmap_image);
 423         minimap_image->drop();
 424         heightmap_image->drop();
 425
 426         data->map_invalidated = true;
 427
 428         return data->texture;
 429 }
 430
 431 v3f Mapper::getYawVec()
 432 {
 433         if (data->minimap_shape_round) {
 434                 return v3f(
 435                         cos(m_angle * core::DEGTORAD),
 436                         sin(m_angle * core::DEGTORAD),
 437                         1.0);
 438         } else {
 439                 return v3f(1.0, 0.0, 1.0);
 440         }
 441 }
 442
 443 scene::SMeshBuffer *Mapper::getMinimapMeshBuffer()
 444 {
 445         scene::SMeshBuffer *buf = new scene::SMeshBuffer();
 446         buf->Vertices.set_used(4);
 447         buf->Indices.set_used(6);
 448         video::SColor c(255, 255, 255, 255);
 449
 450         buf->Vertices[0] = video::S3DVertex(-1, -1, 0, 0, 0, 1, c, 0, 1);
 451         buf->Vertices[1] = video::S3DVertex(-1,  1, 0, 0, 0, 1, c, 0, 0);
 452         buf->Vertices[2] = video::S3DVertex( 1,  1, 0, 0, 0, 1, c, 1, 0);
 453         buf->Vertices[3] = video::S3DVertex( 1, -1, 0, 0, 0, 1, c, 1, 1);
 454
 455         buf->Indices[0] = 0;
 456         buf->Indices[1] = 1;
 457         buf->Indices[2] = 2;
 458         buf->Indices[3] = 2;
 459         buf->Indices[4] = 3;
 460         buf->Indices[5] = 0;
 461
 462         return buf;
 463 }
 464
 465 void Mapper::drawMinimap()
 466 {
 467         video::ITexture *minimap_texture = getMinimapTexture();
 468         if (!minimap_texture)
 469                 return;
 470
 471         v2u32 screensize = porting::getWindowSize();
 472         const u32 size = 0.25 * screensize.Y;
 473
 474         core::rect<s32> oldViewPort = driver->getViewPort();
 475         core::matrix4 oldProjMat = driver->getTransform(video::ETS_PROJECTION);
 476         core::matrix4 oldViewMat = driver->getTransform(video::ETS_VIEW);
 477
 478         driver->setViewPort(core::rect<s32>(
 479                 screensize.X - size - 10, 10,
 480                 screensize.X - 10, size + 10));
 481         driver->setTransform(video::ETS_PROJECTION, core::matrix4());
 482         driver->setTransform(video::ETS_VIEW, core::matrix4());
 483
 484         core::matrix4 matrix;
 485         matrix.makeIdentity();
 486
 487         video::SMaterial &material = m_meshbuffer->getMaterial();
 488         material.setFlag(video::EMF_TRILINEAR_FILTER, true);
 489         material.Lighting = false;
 490         material.TextureLayer[0].Texture = minimap_texture;
 491         material.TextureLayer[1].Texture = data->heightmap_texture;
 492
 493         if (m_enable_shaders && !data->is_radar) {
 494                 u16 sid = m_shdrsrc->getShader("minimap_shader", 1, 1);
 495                 material.MaterialType = m_shdrsrc->getShaderInfo(sid).material;
 496         } else {
 497                 material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 498         }
 499
 500         if (data->minimap_shape_round)
 501                 matrix.setRotationDegrees(core::vector3df(0, 0, 360 - m_angle));
 502
 503         // Draw minimap
 504         driver->setTransform(video::ETS_WORLD, matrix);
 505         driver->setMaterial(material);
 506         driver->drawMeshBuffer(m_meshbuffer);
 507
 508         // Draw overlay
 509         video::ITexture *minimap_overlay = data->minimap_shape_round ?
 510                 data->minimap_overlay_round : data->minimap_overlay_square;
 511         material.TextureLayer[0].Texture = minimap_overlay;
 512         material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 513         driver->setMaterial(material);
 514         driver->drawMeshBuffer(m_meshbuffer);
 515
 516         // If round minimap, draw player marker
 517         if (!data->minimap_shape_round) {
 518                 matrix.setRotationDegrees(core::vector3df(0, 0, m_angle));
 519                 material.TextureLayer[0].Texture = data->player_marker;
 520
 521                 driver->setTransform(video::ETS_WORLD, matrix);
 522                 driver->setMaterial(material);
 523                 driver->drawMeshBuffer(m_meshbuffer);
 524         }
 525
 526         // Reset transformations
 527         driver->setTransform(video::ETS_VIEW, oldViewMat);
 528         driver->setTransform(video::ETS_PROJECTION, oldProjMat);
 529         driver->setViewPort(oldViewPort);
 530 }
 531
 532 ////
 533 //// MinimapMapblock
 534 ////
 535
 536 void MinimapMapblock::getMinimapNodes(VoxelManipulator *vmanip, v3s16 pos)
 537 {
 538
 539         for (s16 x = 0; x < MAP_BLOCKSIZE; x++)
 540         for (s16 z = 0; z < MAP_BLOCKSIZE; z++) {
 541                 s16 air_count = 0;
 542                 bool surface_found = false;
 543                 MinimapPixel *mmpixel = &data[z * MAP_BLOCKSIZE + x];
 544
 545                 for (s16 y = MAP_BLOCKSIZE -1; y >= 0; y--) {
 546                         v3s16 p(x, y, z);
 547                         MapNode n = vmanip->getNodeNoEx(pos + p);
 548                         if (!surface_found && n.getContent() != CONTENT_AIR) {
 549                                 mmpixel->height = y;
 550                                 mmpixel->id = n.getContent();
 551                                 surface_found = true;
 552                         } else if (n.getContent() == CONTENT_AIR) {
 553                                 air_count++;
 554                         }
 555                 }
 556
 557                 if (!surface_found)
 558                         mmpixel->id = CONTENT_AIR;
 559
 560                 mmpixel->air_count = air_count;
 561         }
 562 }