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 "mapblock.h"
  30 #include <math.h>
  31 #include "client/renderingengine.h"
  32
  33
  34 ////
  35 //// MinimapUpdateThread
  36 ////
  37
  38 MinimapUpdateThread::~MinimapUpdateThread()
  39 {
  40         for (std::map<v3s16, MinimapMapblock *>::iterator
  41                         it = m_blocks_cache.begin();
  42                         it != m_blocks_cache.end(); ++it) {
  43                 delete it->second;
  44         }
  45
  46         for (std::deque<QueuedMinimapUpdate>::iterator
  47                         it = m_update_queue.begin();
  48                         it != m_update_queue.end(); ++it) {
  49                 QueuedMinimapUpdate &q = *it;
  50                 delete q.data;
  51         }
  52 }
  53
  54 bool MinimapUpdateThread::pushBlockUpdate(v3s16 pos, MinimapMapblock *data)
  55 {
  56         MutexAutoLock lock(m_queue_mutex);
  57
  58         // Find if block is already in queue.
  59         // If it is, update the data and quit.
  60         for (std::deque<QueuedMinimapUpdate>::iterator
  61                         it = m_update_queue.begin();
  62                         it != m_update_queue.end(); ++it) {
  63                 QueuedMinimapUpdate &q = *it;
  64                 if (q.pos == pos) {
  65                         delete q.data;
  66                         q.data = data;
  67                         return false;
  68                 }
  69         }
  70
  71         // Add the block
  72         QueuedMinimapUpdate q;
  73         q.pos  = pos;
  74         q.data = data;
  75         m_update_queue.push_back(q);
  76
  77         return true;
  78 }
  79
  80 bool MinimapUpdateThread::popBlockUpdate(QueuedMinimapUpdate *update)
  81 {
  82         MutexAutoLock lock(m_queue_mutex);
  83
  84         if (m_update_queue.empty())
  85                 return false;
  86
  87         *update = m_update_queue.front();
  88         m_update_queue.pop_front();
  89
  90         return true;
  91 }
  92
  93 void MinimapUpdateThread::enqueueBlock(v3s16 pos, MinimapMapblock *data)
  94 {
  95         pushBlockUpdate(pos, data);
  96         deferUpdate();
  97 }
  98
  99
 100 void MinimapUpdateThread::doUpdate()
 101 {
 102         QueuedMinimapUpdate update;
 103
 104         while (popBlockUpdate(&update)) {
 105                 if (update.data) {
 106                         // Swap two values in the map using single lookup
 107                         std::pair<std::map<v3s16, MinimapMapblock*>::iterator, bool>
 108                             result = m_blocks_cache.insert(std::make_pair(update.pos, update.data));
 109                         if (!result.second) {
 110                                 delete result.first->second;
 111                                 result.first->second = update.data;
 112                         }
 113                 } else {
 114                         std::map<v3s16, MinimapMapblock *>::iterator it;
 115                         it = m_blocks_cache.find(update.pos);
 116                         if (it != m_blocks_cache.end()) {
 117                                 delete it->second;
 118                                 m_blocks_cache.erase(it);
 119                         }
 120                 }
 121         }
 122
 123         if (data->map_invalidated && data->mode != MINIMAP_MODE_OFF) {
 124                 getMap(data->pos, data->map_size, data->scan_height);
 125                 data->map_invalidated = false;
 126         }
 127 }
 128
 129 void MinimapUpdateThread::getMap(v3s16 pos, s16 size, s16 height)
 130 {
 131         v3s16 region(size, 0, size);
 132         v3s16 pos_min(pos.X - size / 2, pos.Y - height / 2, pos.Z - size / 2);
 133         v3s16 pos_max(pos_min.X + size - 1, pos.Y + height / 2, pos_min.Z + size - 1);
 134         v3s16 blockpos_min = getNodeBlockPos(pos_min);
 135         v3s16 blockpos_max = getNodeBlockPos(pos_max);
 136
 137 // clear the map
 138         for (int z = 0; z < size; z++)
 139         for (int x = 0; x < size; x++) {
 140                 MinimapPixel &mmpixel = data->minimap_scan[x + z * size];
 141                 mmpixel.air_count = 0;
 142                 mmpixel.height = 0;
 143                 mmpixel.n = MapNode(CONTENT_AIR);
 144         }
 145
 146 // draw the map
 147         v3s16 blockpos;
 148         for (blockpos.Z = blockpos_min.Z; blockpos.Z <= blockpos_max.Z; ++blockpos.Z)
 149         for (blockpos.Y = blockpos_min.Y; blockpos.Y <= blockpos_max.Y; ++blockpos.Y)
 150         for (blockpos.X = blockpos_min.X; blockpos.X <= blockpos_max.X; ++blockpos.X) {
 151                 std::map<v3s16, MinimapMapblock *>::const_iterator pblock =
 152                         m_blocks_cache.find(blockpos);
 153                 if (pblock == m_blocks_cache.end())
 154                         continue;
 155                 const MinimapMapblock &block = *pblock->second;
 156
 157                 v3s16 block_node_min(blockpos * MAP_BLOCKSIZE);
 158                 v3s16 block_node_max(block_node_min + MAP_BLOCKSIZE - 1);
 159                 // clip
 160                 v3s16 range_min = componentwise_max(block_node_min, pos_min);
 161                 v3s16 range_max = componentwise_min(block_node_max, pos_max);
 162
 163                 v3s16 pos;
 164                 pos.Y = range_min.Y;
 165                 for (pos.Z = range_min.Z; pos.Z <= range_max.Z; ++pos.Z)
 166                 for (pos.X = range_min.X; pos.X <= range_max.X; ++pos.X) {
 167                         v3s16 inblock_pos = pos - block_node_min;
 168                         const MinimapPixel &in_pixel =
 169                                 block.data[inblock_pos.Z * MAP_BLOCKSIZE + inblock_pos.X];
 170
 171                         v3s16 inmap_pos = pos - pos_min;
 172                         MinimapPixel &out_pixel =
 173                                 data->minimap_scan[inmap_pos.X + inmap_pos.Z * size];
 174
 175                         out_pixel.air_count += in_pixel.air_count;
 176                         if (in_pixel.n.param0 != CONTENT_AIR) {
 177                                 out_pixel.n = in_pixel.n;
 178                                 out_pixel.height = inmap_pos.Y + in_pixel.height;
 179                         }
 180                 }
 181         }
 182 }
 183
 184 ////
 185 //// Mapper
 186 ////
 187
 188 Minimap::Minimap(Client *client)
 189 {
 190         this->client    = client;
 191         this->driver    = RenderingEngine::get_video_driver();
 192         this->m_tsrc    = client->getTextureSource();
 193         this->m_shdrsrc = client->getShaderSource();
 194         this->m_ndef    = client->getNodeDefManager();
 195
 196         m_angle = 0.f;
 197
 198         // Initialize static settings
 199         m_enable_shaders = g_settings->getBool("enable_shaders");
 200         m_surface_mode_scan_height =
 201                 g_settings->getBool("minimap_double_scan_height") ? 256 : 128;
 202
 203         // Initialize minimap data
 204         data = new MinimapData;
 205         data->mode              = MINIMAP_MODE_OFF;
 206         data->is_radar          = false;
 207         data->map_invalidated   = true;
 208         data->texture           = NULL;
 209         data->heightmap_texture = NULL;
 210         data->minimap_shape_round = g_settings->getBool("minimap_shape_round");
 211
 212         // Get round minimap textures
 213         data->minimap_mask_round = driver->createImage(
 214                 m_tsrc->getTexture("minimap_mask_round.png"),
 215                 core::position2d<s32>(0, 0),
 216                 core::dimension2d<u32>(MINIMAP_MAX_SX, MINIMAP_MAX_SY));
 217         data->minimap_overlay_round = m_tsrc->getTexture("minimap_overlay_round.png");
 218
 219         // Get square minimap textures
 220         data->minimap_mask_square = driver->createImage(
 221                 m_tsrc->getTexture("minimap_mask_square.png"),
 222                 core::position2d<s32>(0, 0),
 223                 core::dimension2d<u32>(MINIMAP_MAX_SX, MINIMAP_MAX_SY));
 224         data->minimap_overlay_square = m_tsrc->getTexture("minimap_overlay_square.png");
 225
 226         // Create player marker texture
 227         data->player_marker = m_tsrc->getTexture("player_marker.png");
 228         // Create object marker texture
 229         data->object_marker_red = m_tsrc->getTexture("object_marker_red.png");
 230
 231         // Create mesh buffer for minimap
 232         m_meshbuffer = getMinimapMeshBuffer();
 233
 234         // Initialize and start thread
 235         m_minimap_update_thread = new MinimapUpdateThread();
 236         m_minimap_update_thread->data = data;
 237         m_minimap_update_thread->start();
 238 }
 239
 240 Minimap::~Minimap()
 241 {
 242         m_minimap_update_thread->stop();
 243         m_minimap_update_thread->wait();
 244
 245         m_meshbuffer->drop();
 246
 247         data->minimap_mask_round->drop();
 248         data->minimap_mask_square->drop();
 249
 250         driver->removeTexture(data->texture);
 251         driver->removeTexture(data->heightmap_texture);
 252         driver->removeTexture(data->minimap_overlay_round);
 253         driver->removeTexture(data->minimap_overlay_square);
 254         driver->removeTexture(data->object_marker_red);
 255
 256         delete data;
 257         delete m_minimap_update_thread;
 258 }
 259
 260 void Minimap::addBlock(v3s16 pos, MinimapMapblock *data)
 261 {
 262         m_minimap_update_thread->enqueueBlock(pos, data);
 263 }
 264
 265 void Minimap::toggleMinimapShape()
 266 {
 267         MutexAutoLock lock(m_mutex);
 268
 269         data->minimap_shape_round = !data->minimap_shape_round;
 270         g_settings->setBool("minimap_shape_round", data->minimap_shape_round);
 271         m_minimap_update_thread->deferUpdate();
 272 }
 273
 274 void Minimap::setMinimapShape(MinimapShape shape)
 275 {
 276         MutexAutoLock lock(m_mutex);
 277
 278         if (shape == MINIMAP_SHAPE_SQUARE)
 279                 data->minimap_shape_round = false;
 280         else if (shape == MINIMAP_SHAPE_ROUND)
 281                 data->minimap_shape_round = true;
 282
 283         g_settings->setBool("minimap_shape_round", data->minimap_shape_round);
 284         m_minimap_update_thread->deferUpdate();
 285 }
 286
 287 MinimapShape Minimap::getMinimapShape()
 288 {
 289         if (data->minimap_shape_round) {
 290                 return MINIMAP_SHAPE_ROUND;
 291         } else {
 292                 return MINIMAP_SHAPE_SQUARE;
 293         }
 294 }
 295
 296 void Minimap::setMinimapMode(MinimapMode mode)
 297 {
 298         static const MinimapModeDef modedefs[MINIMAP_MODE_COUNT] = {
 299                 {false, 0, 0},
 300                 {false, m_surface_mode_scan_height, 256},
 301                 {false, m_surface_mode_scan_height, 128},
 302                 {false, m_surface_mode_scan_height, 64},
 303                 {true, 32, 128},
 304                 {true, 32, 64},
 305                 {true, 32, 32}
 306         };
 307
 308         if (mode >= MINIMAP_MODE_COUNT)
 309                 return;
 310
 311         MutexAutoLock lock(m_mutex);
 312
 313         data->is_radar    = modedefs[mode].is_radar;
 314         data->scan_height = modedefs[mode].scan_height;
 315         data->map_size    = modedefs[mode].map_size;
 316         data->mode        = mode;
 317
 318         m_minimap_update_thread->deferUpdate();
 319 }
 320
 321 void Minimap::setPos(v3s16 pos)
 322 {
 323         bool do_update = false;
 324
 325         {
 326                 MutexAutoLock lock(m_mutex);
 327
 328                 if (pos != data->old_pos) {
 329                         data->old_pos = data->pos;
 330                         data->pos = pos;
 331                         do_update = true;
 332                 }
 333         }
 334
 335         if (do_update)
 336                 m_minimap_update_thread->deferUpdate();
 337 }
 338
 339 void Minimap::setAngle(f32 angle)
 340 {
 341         m_angle = angle;
 342 }
 343
 344 void Minimap::blitMinimapPixelsToImageRadar(video::IImage *map_image)
 345 {
 346         video::SColor c(240, 0, 0, 0);
 347         for (s16 x = 0; x < data->map_size; x++)
 348         for (s16 z = 0; z < data->map_size; z++) {
 349                 MinimapPixel *mmpixel = &data->minimap_scan[x + z * data->map_size];
 350
 351                 if (mmpixel->air_count > 0)
 352                         c.setGreen(core::clamp(core::round32(32 + mmpixel->air_count * 8), 0, 255));
 353                 else
 354                         c.setGreen(0);
 355
 356                 map_image->setPixel(x, data->map_size - z - 1, c);
 357         }
 358 }
 359
 360 void Minimap::blitMinimapPixelsToImageSurface(
 361         video::IImage *map_image, video::IImage *heightmap_image)
 362 {
 363         // This variable creation/destruction has a 1% cost on rendering minimap
 364         video::SColor tilecolor;
 365         for (s16 x = 0; x < data->map_size; x++)
 366         for (s16 z = 0; z < data->map_size; z++) {
 367                 MinimapPixel *mmpixel = &data->minimap_scan[x + z * data->map_size];
 368
 369                 const ContentFeatures &f = m_ndef->get(mmpixel->n);
 370                 const TileDef *tile = &f.tiledef[0];
 371
 372                 // Color of the 0th tile (mostly this is the topmost)
 373                 if(tile->has_color)
 374                         tilecolor = tile->color;
 375                 else
 376                         mmpixel->n.getColor(f, &tilecolor);
 377
 378                 tilecolor.setRed(tilecolor.getRed() * f.minimap_color.getRed() / 255);
 379                 tilecolor.setGreen(tilecolor.getGreen() * f.minimap_color.getGreen() / 255);
 380                 tilecolor.setBlue(tilecolor.getBlue() * f.minimap_color.getBlue() / 255);
 381                 tilecolor.setAlpha(240);
 382
 383                 map_image->setPixel(x, data->map_size - z - 1, tilecolor);
 384
 385                 u32 h = mmpixel->height;
 386                 heightmap_image->setPixel(x,data->map_size - z - 1,
 387                         video::SColor(255, h, h, h));
 388         }
 389 }
 390
 391 video::ITexture *Minimap::getMinimapTexture()
 392 {
 393         // update minimap textures when new scan is ready
 394         if (data->map_invalidated)
 395                 return data->texture;
 396
 397         // create minimap and heightmap images in memory
 398         core::dimension2d<u32> dim(data->map_size, data->map_size);
 399         video::IImage *map_image       = driver->createImage(video::ECF_A8R8G8B8, dim);
 400         video::IImage *heightmap_image = driver->createImage(video::ECF_A8R8G8B8, dim);
 401         video::IImage *minimap_image   = driver->createImage(video::ECF_A8R8G8B8,
 402                 core::dimension2d<u32>(MINIMAP_MAX_SX, MINIMAP_MAX_SY));
 403
 404         // Blit MinimapPixels to images
 405         if (data->is_radar)
 406                 blitMinimapPixelsToImageRadar(map_image);
 407         else
 408                 blitMinimapPixelsToImageSurface(map_image, heightmap_image);
 409
 410         map_image->copyToScaling(minimap_image);
 411         map_image->drop();
 412
 413         video::IImage *minimap_mask = data->minimap_shape_round ?
 414                 data->minimap_mask_round : data->minimap_mask_square;
 415
 416         if (minimap_mask) {
 417                 for (s16 y = 0; y < MINIMAP_MAX_SY; y++)
 418                 for (s16 x = 0; x < MINIMAP_MAX_SX; x++) {
 419                         const video::SColor &mask_col = minimap_mask->getPixel(x, y);
 420                         if (!mask_col.getAlpha())
 421                                 minimap_image->setPixel(x, y, video::SColor(0,0,0,0));
 422                 }
 423         }
 424
 425         if (data->texture)
 426                 driver->removeTexture(data->texture);
 427         if (data->heightmap_texture)
 428                 driver->removeTexture(data->heightmap_texture);
 429
 430         data->texture = driver->addTexture("minimap__", minimap_image);
 431         data->heightmap_texture =
 432                 driver->addTexture("minimap_heightmap__", heightmap_image);
 433         minimap_image->drop();
 434         heightmap_image->drop();
 435
 436         data->map_invalidated = true;
 437
 438         return data->texture;
 439 }
 440
 441 v3f Minimap::getYawVec()
 442 {
 443         if (data->minimap_shape_round) {
 444                 return v3f(
 445                         cos(m_angle * core::DEGTORAD),
 446                         sin(m_angle * core::DEGTORAD),
 447                         1.0);
 448         } else {
 449                 return v3f(1.0, 0.0, 1.0);
 450         }
 451 }
 452
 453 scene::SMeshBuffer *Minimap::getMinimapMeshBuffer()
 454 {
 455         scene::SMeshBuffer *buf = new scene::SMeshBuffer();
 456         buf->Vertices.set_used(4);
 457         buf->Indices.set_used(6);
 458         static const video::SColor c(255, 255, 255, 255);
 459
 460         buf->Vertices[0] = video::S3DVertex(-1, -1, 0, 0, 0, 1, c, 0, 1);
 461         buf->Vertices[1] = video::S3DVertex(-1,  1, 0, 0, 0, 1, c, 0, 0);
 462         buf->Vertices[2] = video::S3DVertex( 1,  1, 0, 0, 0, 1, c, 1, 0);
 463         buf->Vertices[3] = video::S3DVertex( 1, -1, 0, 0, 0, 1, c, 1, 1);
 464
 465         buf->Indices[0] = 0;
 466         buf->Indices[1] = 1;
 467         buf->Indices[2] = 2;
 468         buf->Indices[3] = 2;
 469         buf->Indices[4] = 3;
 470         buf->Indices[5] = 0;
 471
 472         return buf;
 473 }
 474
 475 void Minimap::drawMinimap()
 476 {
 477         video::ITexture *minimap_texture = getMinimapTexture();
 478         if (!minimap_texture)
 479                 return;
 480
 481         updateActiveMarkers();
 482         v2u32 screensize = RenderingEngine::get_instance()->getWindowSize();
 483         const u32 size = 0.25 * screensize.Y;
 484
 485         core::rect<s32> oldViewPort = driver->getViewPort();
 486         core::matrix4 oldProjMat = driver->getTransform(video::ETS_PROJECTION);
 487         core::matrix4 oldViewMat = driver->getTransform(video::ETS_VIEW);
 488
 489         driver->setViewPort(core::rect<s32>(
 490                 screensize.X - size - 10, 10,
 491                 screensize.X - 10, size + 10));
 492         driver->setTransform(video::ETS_PROJECTION, core::matrix4());
 493         driver->setTransform(video::ETS_VIEW, core::matrix4());
 494
 495         core::matrix4 matrix;
 496         matrix.makeIdentity();
 497
 498         video::SMaterial &material = m_meshbuffer->getMaterial();
 499         material.setFlag(video::EMF_TRILINEAR_FILTER, true);
 500         material.Lighting = false;
 501         material.TextureLayer[0].Texture = minimap_texture;
 502         material.TextureLayer[1].Texture = data->heightmap_texture;
 503
 504         if (m_enable_shaders && !data->is_radar) {
 505                 u16 sid = m_shdrsrc->getShader("minimap_shader", 1, 1);
 506                 material.MaterialType = m_shdrsrc->getShaderInfo(sid).material;
 507         } else {
 508                 material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 509         }
 510
 511         if (data->minimap_shape_round)
 512                 matrix.setRotationDegrees(core::vector3df(0, 0, 360 - m_angle));
 513
 514         // Draw minimap
 515         driver->setTransform(video::ETS_WORLD, matrix);
 516         driver->setMaterial(material);
 517         driver->drawMeshBuffer(m_meshbuffer);
 518
 519         // Draw overlay
 520         video::ITexture *minimap_overlay = data->minimap_shape_round ?
 521                 data->minimap_overlay_round : data->minimap_overlay_square;
 522         material.TextureLayer[0].Texture = minimap_overlay;
 523         material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 524         driver->setMaterial(material);
 525         driver->drawMeshBuffer(m_meshbuffer);
 526
 527         // If round minimap, draw player marker
 528         if (!data->minimap_shape_round) {
 529                 matrix.setRotationDegrees(core::vector3df(0, 0, m_angle));
 530                 material.TextureLayer[0].Texture = data->player_marker;
 531
 532                 driver->setTransform(video::ETS_WORLD, matrix);
 533                 driver->setMaterial(material);
 534                 driver->drawMeshBuffer(m_meshbuffer);
 535         }
 536
 537         // Reset transformations
 538         driver->setTransform(video::ETS_VIEW, oldViewMat);
 539         driver->setTransform(video::ETS_PROJECTION, oldProjMat);
 540         driver->setViewPort(oldViewPort);
 541
 542         // Draw player markers
 543         v2s32 s_pos(screensize.X - size - 10, 10);
 544         core::dimension2di imgsize(data->object_marker_red->getOriginalSize());
 545         core::rect<s32> img_rect(0, 0, imgsize.Width, imgsize.Height);
 546         static const video::SColor col(255, 255, 255, 255);
 547         static const video::SColor c[4] = {col, col, col, col};
 548         f32 sin_angle = sin(m_angle * core::DEGTORAD);
 549         f32 cos_angle = cos(m_angle * core::DEGTORAD);
 550         s32 marker_size2 =  0.025 * (float)size;
 551         for (std::list<v2f>::const_iterator
 552                         i = m_active_markers.begin();
 553                         i != m_active_markers.end(); ++i) {
 554                 v2f posf = *i;
 555                 if (data->minimap_shape_round) {
 556                         f32 t1 = posf.X * cos_angle - posf.Y * sin_angle;
 557                         f32 t2 = posf.X * sin_angle + posf.Y * cos_angle;
 558                         posf.X = t1;
 559                         posf.Y = t2;
 560                 }
 561                 posf.X = (posf.X + 0.5) * (float)size;
 562                 posf.Y = (posf.Y + 0.5) * (float)size;
 563                 core::rect<s32> dest_rect(
 564                         s_pos.X + posf.X - marker_size2,
 565                         s_pos.Y + posf.Y - marker_size2,
 566                         s_pos.X + posf.X + marker_size2,
 567                         s_pos.Y + posf.Y + marker_size2);
 568                 driver->draw2DImage(data->object_marker_red, dest_rect,
 569                         img_rect, &dest_rect, &c[0], true);
 570         }
 571 }
 572
 573 void Minimap::updateActiveMarkers()
 574 {
 575         video::IImage *minimap_mask = data->minimap_shape_round ?
 576                 data->minimap_mask_round : data->minimap_mask_square;
 577
 578         const std::list<Nametag *> &nametags = client->getCamera()->getNametags();
 579
 580         m_active_markers.clear();
 581
 582         for (std::list<Nametag *>::const_iterator i = nametags.begin();
 583                         i != nametags.end(); ++i) {
 584                 v3s16 pos = floatToInt((*i)->parent_node->getPosition() +
 585                         intToFloat(client->getCamera()->getOffset(), BS), BS);
 586                 pos -= data->pos - v3s16(data->map_size / 2,
 587                                 data->scan_height / 2,
 588                                 data->map_size / 2);
 589                 if (pos.X < 0 || pos.X > data->map_size ||
 590                                 pos.Y < 0 || pos.Y > data->scan_height ||
 591                                 pos.Z < 0 || pos.Z > data->map_size) {
 592                         continue;
 593                 }
 594                 pos.X = ((float)pos.X / data->map_size) * MINIMAP_MAX_SX;
 595                 pos.Z = ((float)pos.Z / data->map_size) * MINIMAP_MAX_SY;
 596                 const video::SColor &mask_col = minimap_mask->getPixel(pos.X, pos.Z);
 597                 if (!mask_col.getAlpha()) {
 598                         continue;
 599                 }
 600                 m_active_markers.push_back(v2f(((float)pos.X / (float)MINIMAP_MAX_SX) - 0.5,
 601                         (1.0 - (float)pos.Z / (float)MINIMAP_MAX_SY) - 0.5));
 602         }
 603 }
 604
 605 ////
 606 //// MinimapMapblock
 607 ////
 608
 609 void MinimapMapblock::getMinimapNodes(VoxelManipulator *vmanip, const v3s16 &pos)
 610 {
 611
 612         for (s16 x = 0; x < MAP_BLOCKSIZE; x++)
 613         for (s16 z = 0; z < MAP_BLOCKSIZE; z++) {
 614                 s16 air_count = 0;
 615                 bool surface_found = false;
 616                 MinimapPixel *mmpixel = &data[z * MAP_BLOCKSIZE + x];
 617
 618                 for (s16 y = MAP_BLOCKSIZE -1; y >= 0; y--) {
 619                         v3s16 p(x, y, z);
 620                         MapNode n = vmanip->getNodeNoEx(pos + p);
 621                         if (!surface_found && n.getContent() != CONTENT_AIR) {
 622                                 mmpixel->height = y;
 623                                 mmpixel->n = n;
 624                                 surface_found = true;
 625                         } else if (n.getContent() == CONTENT_AIR) {
 626                                 air_count++;
 627                         }
 628                 }
 629
 630                 if (!surface_found)
 631                         mmpixel->n = MapNode(CONTENT_AIR);
 632
 633                 mmpixel->air_count = air_count;
 634         }
 635 }