src/client/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 <cmath>
  22 #include "client.h"
  23 #include "clientmap.h"
  24 #include "settings.h"
  25 #include "shader.h"
  26 #include "mapblock.h"
  27 #include "client/renderingengine.h"
  28
  29
  30 ////
  31 //// MinimapUpdateThread
  32 ////
  33
  34 MinimapUpdateThread::~MinimapUpdateThread()
  35 {
  36         for (auto &it : m_blocks_cache) {
  37                 delete it.second;
  38         }
  39
  40         for (auto &q : m_update_queue) {
  41                 delete q.data;
  42         }
  43 }
  44
  45 bool MinimapUpdateThread::pushBlockUpdate(v3s16 pos, MinimapMapblock *data)
  46 {
  47         MutexAutoLock lock(m_queue_mutex);
  48
  49         // Find if block is already in queue.
  50         // If it is, update the data and quit.
  51         for (QueuedMinimapUpdate &q : m_update_queue) {
  52                 if (q.pos == pos) {
  53                         delete q.data;
  54                         q.data = data;
  55                         return false;
  56                 }
  57         }
  58
  59         // Add the block
  60         QueuedMinimapUpdate q;
  61         q.pos  = pos;
  62         q.data = data;
  63         m_update_queue.push_back(q);
  64
  65         return true;
  66 }
  67
  68 bool MinimapUpdateThread::popBlockUpdate(QueuedMinimapUpdate *update)
  69 {
  70         MutexAutoLock lock(m_queue_mutex);
  71
  72         if (m_update_queue.empty())
  73                 return false;
  74
  75         *update = m_update_queue.front();
  76         m_update_queue.pop_front();
  77
  78         return true;
  79 }
  80
  81 void MinimapUpdateThread::enqueueBlock(v3s16 pos, MinimapMapblock *data)
  82 {
  83         pushBlockUpdate(pos, data);
  84         deferUpdate();
  85 }
  86
  87
  88 void MinimapUpdateThread::doUpdate()
  89 {
  90         QueuedMinimapUpdate update;
  91
  92         while (popBlockUpdate(&update)) {
  93                 if (update.data) {
  94                         // Swap two values in the map using single lookup
  95                         std::pair<std::map<v3s16, MinimapMapblock*>::iterator, bool>
  96                             result = m_blocks_cache.insert(std::make_pair(update.pos, update.data));
  97                         if (!result.second) {
  98                                 delete result.first->second;
  99                                 result.first->second = update.data;
 100                         }
 101                 } else {
 102                         std::map<v3s16, MinimapMapblock *>::iterator it;
 103                         it = m_blocks_cache.find(update.pos);
 104                         if (it != m_blocks_cache.end()) {
 105                                 delete it->second;
 106                                 m_blocks_cache.erase(it);
 107                         }
 108                 }
 109         }
 110
 111         if (data->map_invalidated && data->mode != MINIMAP_MODE_OFF) {
 112                 getMap(data->pos, data->map_size, data->scan_height);
 113                 data->map_invalidated = false;
 114         }
 115 }
 116
 117 void MinimapUpdateThread::getMap(v3s16 pos, s16 size, s16 height)
 118 {
 119         v3s16 pos_min(pos.X - size / 2, pos.Y - height / 2, pos.Z - size / 2);
 120         v3s16 pos_max(pos_min.X + size - 1, pos.Y + height / 2, pos_min.Z + size - 1);
 121         v3s16 blockpos_min = getNodeBlockPos(pos_min);
 122         v3s16 blockpos_max = getNodeBlockPos(pos_max);
 123
 124 // clear the map
 125         for (int z = 0; z < size; z++)
 126         for (int x = 0; x < size; x++) {
 127                 MinimapPixel &mmpixel = data->minimap_scan[x + z * size];
 128                 mmpixel.air_count = 0;
 129                 mmpixel.height = 0;
 130                 mmpixel.n = MapNode(CONTENT_AIR);
 131         }
 132
 133 // draw the map
 134         v3s16 blockpos;
 135         for (blockpos.Z = blockpos_min.Z; blockpos.Z <= blockpos_max.Z; ++blockpos.Z)
 136         for (blockpos.Y = blockpos_min.Y; blockpos.Y <= blockpos_max.Y; ++blockpos.Y)
 137         for (blockpos.X = blockpos_min.X; blockpos.X <= blockpos_max.X; ++blockpos.X) {
 138                 std::map<v3s16, MinimapMapblock *>::const_iterator pblock =
 139                         m_blocks_cache.find(blockpos);
 140                 if (pblock == m_blocks_cache.end())
 141                         continue;
 142                 const MinimapMapblock &block = *pblock->second;
 143
 144                 v3s16 block_node_min(blockpos * MAP_BLOCKSIZE);
 145                 v3s16 block_node_max(block_node_min + MAP_BLOCKSIZE - 1);
 146                 // clip
 147                 v3s16 range_min = componentwise_max(block_node_min, pos_min);
 148                 v3s16 range_max = componentwise_min(block_node_max, pos_max);
 149
 150                 v3s16 pos;
 151                 pos.Y = range_min.Y;
 152                 for (pos.Z = range_min.Z; pos.Z <= range_max.Z; ++pos.Z)
 153                 for (pos.X = range_min.X; pos.X <= range_max.X; ++pos.X) {
 154                         v3s16 inblock_pos = pos - block_node_min;
 155                         const MinimapPixel &in_pixel =
 156                                 block.data[inblock_pos.Z * MAP_BLOCKSIZE + inblock_pos.X];
 157
 158                         v3s16 inmap_pos = pos - pos_min;
 159                         MinimapPixel &out_pixel =
 160                                 data->minimap_scan[inmap_pos.X + inmap_pos.Z * size];
 161
 162                         out_pixel.air_count += in_pixel.air_count;
 163                         if (in_pixel.n.param0 != CONTENT_AIR) {
 164                                 out_pixel.n = in_pixel.n;
 165                                 out_pixel.height = inmap_pos.Y + in_pixel.height;
 166                         }
 167                 }
 168         }
 169 }
 170
 171 ////
 172 //// Mapper
 173 ////
 174
 175 Minimap::Minimap(Client *client)
 176 {
 177         this->client    = client;
 178         this->driver    = RenderingEngine::get_video_driver();
 179         this->m_tsrc    = client->getTextureSource();
 180         this->m_shdrsrc = client->getShaderSource();
 181         this->m_ndef    = client->getNodeDefManager();
 182
 183         m_angle = 0.f;
 184
 185         // Initialize static settings
 186         m_enable_shaders = g_settings->getBool("enable_shaders");
 187         m_surface_mode_scan_height =
 188                 g_settings->getBool("minimap_double_scan_height") ? 256 : 128;
 189
 190         // Initialize minimap data
 191         data = new MinimapData;
 192         data->mode              = MINIMAP_MODE_OFF;
 193         data->is_radar          = false;
 194         data->map_invalidated   = true;
 195         data->texture           = NULL;
 196         data->heightmap_texture = NULL;
 197         data->minimap_shape_round = g_settings->getBool("minimap_shape_round");
 198
 199         // Get round minimap textures
 200         data->minimap_mask_round = driver->createImage(
 201                 m_tsrc->getTexture("minimap_mask_round.png"),
 202                 core::position2d<s32>(0, 0),
 203                 core::dimension2d<u32>(MINIMAP_MAX_SX, MINIMAP_MAX_SY));
 204         data->minimap_overlay_round = m_tsrc->getTexture("minimap_overlay_round.png");
 205
 206         // Get square minimap textures
 207         data->minimap_mask_square = driver->createImage(
 208                 m_tsrc->getTexture("minimap_mask_square.png"),
 209                 core::position2d<s32>(0, 0),
 210                 core::dimension2d<u32>(MINIMAP_MAX_SX, MINIMAP_MAX_SY));
 211         data->minimap_overlay_square = m_tsrc->getTexture("minimap_overlay_square.png");
 212
 213         // Create player marker texture
 214         data->player_marker = m_tsrc->getTexture("player_marker.png");
 215         // Create object marker texture
 216         data->object_marker_red = m_tsrc->getTexture("object_marker_red.png");
 217
 218         // Create mesh buffer for minimap
 219         m_meshbuffer = getMinimapMeshBuffer();
 220
 221         // Initialize and start thread
 222         m_minimap_update_thread = new MinimapUpdateThread();
 223         m_minimap_update_thread->data = data;
 224         m_minimap_update_thread->start();
 225 }
 226
 227 Minimap::~Minimap()
 228 {
 229         m_minimap_update_thread->stop();
 230         m_minimap_update_thread->wait();
 231
 232         m_meshbuffer->drop();
 233
 234         data->minimap_mask_round->drop();
 235         data->minimap_mask_square->drop();
 236
 237         driver->removeTexture(data->texture);
 238         driver->removeTexture(data->heightmap_texture);
 239         driver->removeTexture(data->minimap_overlay_round);
 240         driver->removeTexture(data->minimap_overlay_square);
 241         driver->removeTexture(data->object_marker_red);
 242
 243         delete data;
 244         delete m_minimap_update_thread;
 245 }
 246
 247 void Minimap::addBlock(v3s16 pos, MinimapMapblock *data)
 248 {
 249         m_minimap_update_thread->enqueueBlock(pos, data);
 250 }
 251
 252 void Minimap::toggleMinimapShape()
 253 {
 254         MutexAutoLock lock(m_mutex);
 255
 256         data->minimap_shape_round = !data->minimap_shape_round;
 257         g_settings->setBool("minimap_shape_round", data->minimap_shape_round);
 258         m_minimap_update_thread->deferUpdate();
 259 }
 260
 261 void Minimap::setMinimapShape(MinimapShape shape)
 262 {
 263         MutexAutoLock lock(m_mutex);
 264
 265         if (shape == MINIMAP_SHAPE_SQUARE)
 266                 data->minimap_shape_round = false;
 267         else if (shape == MINIMAP_SHAPE_ROUND)
 268                 data->minimap_shape_round = true;
 269
 270         g_settings->setBool("minimap_shape_round", data->minimap_shape_round);
 271         m_minimap_update_thread->deferUpdate();
 272 }
 273
 274 MinimapShape Minimap::getMinimapShape()
 275 {
 276         if (data->minimap_shape_round) {
 277                 return MINIMAP_SHAPE_ROUND;
 278         }
 279
 280         return MINIMAP_SHAPE_SQUARE;
 281 }
 282
 283 void Minimap::setMinimapMode(MinimapMode mode)
 284 {
 285         static const MinimapModeDef modedefs[MINIMAP_MODE_COUNT] = {
 286                 {false, 0, 0},
 287                 {false, m_surface_mode_scan_height, 256},
 288                 {false, m_surface_mode_scan_height, 128},
 289                 {false, m_surface_mode_scan_height, 64},
 290                 {true, 32, 128},
 291                 {true, 32, 64},
 292                 {true, 32, 32}
 293         };
 294
 295         if (mode >= MINIMAP_MODE_COUNT)
 296                 return;
 297
 298         MutexAutoLock lock(m_mutex);
 299
 300         data->is_radar    = modedefs[mode].is_radar;
 301         data->scan_height = modedefs[mode].scan_height;
 302         data->map_size    = modedefs[mode].map_size;
 303         data->mode        = mode;
 304
 305         m_minimap_update_thread->deferUpdate();
 306 }
 307
 308 void Minimap::setPos(v3s16 pos)
 309 {
 310         bool do_update = false;
 311
 312         {
 313                 MutexAutoLock lock(m_mutex);
 314
 315                 if (pos != data->old_pos) {
 316                         data->old_pos = data->pos;
 317                         data->pos = pos;
 318                         do_update = true;
 319                 }
 320         }
 321
 322         if (do_update)
 323                 m_minimap_update_thread->deferUpdate();
 324 }
 325
 326 void Minimap::setAngle(f32 angle)
 327 {
 328         m_angle = angle;
 329 }
 330
 331 void Minimap::blitMinimapPixelsToImageRadar(video::IImage *map_image)
 332 {
 333         video::SColor c(240, 0, 0, 0);
 334         for (s16 x = 0; x < data->map_size; x++)
 335         for (s16 z = 0; z < data->map_size; z++) {
 336                 MinimapPixel *mmpixel = &data->minimap_scan[x + z * data->map_size];
 337
 338                 if (mmpixel->air_count > 0)
 339                         c.setGreen(core::clamp(core::round32(32 + mmpixel->air_count * 8), 0, 255));
 340                 else
 341                         c.setGreen(0);
 342
 343                 map_image->setPixel(x, data->map_size - z - 1, c);
 344         }
 345 }
 346
 347 void Minimap::blitMinimapPixelsToImageSurface(
 348         video::IImage *map_image, video::IImage *heightmap_image)
 349 {
 350         // This variable creation/destruction has a 1% cost on rendering minimap
 351         video::SColor tilecolor;
 352         for (s16 x = 0; x < data->map_size; x++)
 353         for (s16 z = 0; z < data->map_size; z++) {
 354                 MinimapPixel *mmpixel = &data->minimap_scan[x + z * data->map_size];
 355
 356                 const ContentFeatures &f = m_ndef->get(mmpixel->n);
 357                 const TileDef *tile = &f.tiledef[0];
 358
 359                 // Color of the 0th tile (mostly this is the topmost)
 360                 if(tile->has_color)
 361                         tilecolor = tile->color;
 362                 else
 363                         mmpixel->n.getColor(f, &tilecolor);
 364
 365                 tilecolor.setRed(tilecolor.getRed() * f.minimap_color.getRed() / 255);
 366                 tilecolor.setGreen(tilecolor.getGreen() * f.minimap_color.getGreen() / 255);
 367                 tilecolor.setBlue(tilecolor.getBlue() * f.minimap_color.getBlue() / 255);
 368                 tilecolor.setAlpha(240);
 369
 370                 map_image->setPixel(x, data->map_size - z - 1, tilecolor);
 371
 372                 u32 h = mmpixel->height;
 373                 heightmap_image->setPixel(x,data->map_size - z - 1,
 374                         video::SColor(255, h, h, h));
 375         }
 376 }
 377
 378 video::ITexture *Minimap::getMinimapTexture()
 379 {
 380         // update minimap textures when new scan is ready
 381         if (data->map_invalidated)
 382                 return data->texture;
 383
 384         // create minimap and heightmap images in memory
 385         core::dimension2d<u32> dim(data->map_size, data->map_size);
 386         video::IImage *map_image       = driver->createImage(video::ECF_A8R8G8B8, dim);
 387         video::IImage *heightmap_image = driver->createImage(video::ECF_A8R8G8B8, dim);
 388         video::IImage *minimap_image   = driver->createImage(video::ECF_A8R8G8B8,
 389                 core::dimension2d<u32>(MINIMAP_MAX_SX, MINIMAP_MAX_SY));
 390
 391         // Blit MinimapPixels to images
 392         if (data->is_radar)
 393                 blitMinimapPixelsToImageRadar(map_image);
 394         else
 395                 blitMinimapPixelsToImageSurface(map_image, heightmap_image);
 396
 397         map_image->copyToScaling(minimap_image);
 398         map_image->drop();
 399
 400         video::IImage *minimap_mask = data->minimap_shape_round ?
 401                 data->minimap_mask_round : data->minimap_mask_square;
 402
 403         if (minimap_mask) {
 404                 for (s16 y = 0; y < MINIMAP_MAX_SY; y++)
 405                 for (s16 x = 0; x < MINIMAP_MAX_SX; x++) {
 406                         const video::SColor &mask_col = minimap_mask->getPixel(x, y);
 407                         if (!mask_col.getAlpha())
 408                                 minimap_image->setPixel(x, y, video::SColor(0,0,0,0));
 409                 }
 410         }
 411
 412         if (data->texture)
 413                 driver->removeTexture(data->texture);
 414         if (data->heightmap_texture)
 415                 driver->removeTexture(data->heightmap_texture);
 416
 417         data->texture = driver->addTexture("minimap__", minimap_image);
 418         data->heightmap_texture =
 419                 driver->addTexture("minimap_heightmap__", heightmap_image);
 420         minimap_image->drop();
 421         heightmap_image->drop();
 422
 423         data->map_invalidated = true;
 424
 425         return data->texture;
 426 }
 427
 428 v3f Minimap::getYawVec()
 429 {
 430         if (data->minimap_shape_round) {
 431                 return v3f(
 432                         std::cos(m_angle * core::DEGTORAD),
 433                         std::sin(m_angle * core::DEGTORAD),
 434                         1.0);
 435         }
 436
 437         return v3f(1.0, 0.0, 1.0);
 438 }
 439
 440 scene::SMeshBuffer *Minimap::getMinimapMeshBuffer()
 441 {
 442         scene::SMeshBuffer *buf = new scene::SMeshBuffer();
 443         buf->Vertices.set_used(4);
 444         buf->Indices.set_used(6);
 445         static const video::SColor c(255, 255, 255, 255);
 446
 447         buf->Vertices[0] = video::S3DVertex(-1, -1, 0, 0, 0, 1, c, 0, 1);
 448         buf->Vertices[1] = video::S3DVertex(-1,  1, 0, 0, 0, 1, c, 0, 0);
 449         buf->Vertices[2] = video::S3DVertex( 1,  1, 0, 0, 0, 1, c, 1, 0);
 450         buf->Vertices[3] = video::S3DVertex( 1, -1, 0, 0, 0, 1, c, 1, 1);
 451
 452         buf->Indices[0] = 0;
 453         buf->Indices[1] = 1;
 454         buf->Indices[2] = 2;
 455         buf->Indices[3] = 2;
 456         buf->Indices[4] = 3;
 457         buf->Indices[5] = 0;
 458
 459         return buf;
 460 }
 461
 462 void Minimap::drawMinimap()
 463 {
 464         video::ITexture *minimap_texture = getMinimapTexture();
 465         if (!minimap_texture)
 466                 return;
 467
 468         updateActiveMarkers();
 469         v2u32 screensize = RenderingEngine::get_instance()->getWindowSize();
 470         const u32 size = 0.25 * screensize.Y;
 471
 472         core::rect<s32> oldViewPort = driver->getViewPort();
 473         core::matrix4 oldProjMat = driver->getTransform(video::ETS_PROJECTION);
 474         core::matrix4 oldViewMat = driver->getTransform(video::ETS_VIEW);
 475
 476         driver->setViewPort(core::rect<s32>(
 477                 screensize.X - size - 10, 10,
 478                 screensize.X - 10, size + 10));
 479         driver->setTransform(video::ETS_PROJECTION, core::matrix4());
 480         driver->setTransform(video::ETS_VIEW, core::matrix4());
 481
 482         core::matrix4 matrix;
 483         matrix.makeIdentity();
 484
 485         video::SMaterial &material = m_meshbuffer->getMaterial();
 486         material.setFlag(video::EMF_TRILINEAR_FILTER, true);
 487         material.Lighting = false;
 488         material.TextureLayer[0].Texture = minimap_texture;
 489         material.TextureLayer[1].Texture = data->heightmap_texture;
 490
 491         if (m_enable_shaders && !data->is_radar) {
 492                 u16 sid = m_shdrsrc->getShader("minimap_shader", 1, 1);
 493                 material.MaterialType = m_shdrsrc->getShaderInfo(sid).material;
 494         } else {
 495                 material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 496         }
 497
 498         if (data->minimap_shape_round)
 499                 matrix.setRotationDegrees(core::vector3df(0, 0, 360 - m_angle));
 500
 501         // Draw minimap
 502         driver->setTransform(video::ETS_WORLD, matrix);
 503         driver->setMaterial(material);
 504         driver->drawMeshBuffer(m_meshbuffer);
 505
 506         // Draw overlay
 507         video::ITexture *minimap_overlay = data->minimap_shape_round ?
 508                 data->minimap_overlay_round : data->minimap_overlay_square;
 509         material.TextureLayer[0].Texture = minimap_overlay;
 510         material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 511         driver->setMaterial(material);
 512         driver->drawMeshBuffer(m_meshbuffer);
 513
 514         // Draw player marker on minimap
 515         if (data->minimap_shape_round) {
 516                 matrix.setRotationDegrees(core::vector3df(0, 0, 0));
 517         } else {
 518                 matrix.setRotationDegrees(core::vector3df(0, 0, m_angle));
 519         }
 520
 521         material.TextureLayer[0].Texture = data->player_marker;
 522         driver->setTransform(video::ETS_WORLD, matrix);
 523         driver->setMaterial(material);
 524         driver->drawMeshBuffer(m_meshbuffer);
 525
 526         // Reset transformations
 527         driver->setTransform(video::ETS_VIEW, oldViewMat);
 528         driver->setTransform(video::ETS_PROJECTION, oldProjMat);
 529         driver->setViewPort(oldViewPort);
 530
 531         // Draw player markers
 532         v2s32 s_pos(screensize.X - size - 10, 10);
 533         core::dimension2di imgsize(data->object_marker_red->getOriginalSize());
 534         core::rect<s32> img_rect(0, 0, imgsize.Width, imgsize.Height);
 535         static const video::SColor col(255, 255, 255, 255);
 536         static const video::SColor c[4] = {col, col, col, col};
 537         f32 sin_angle = std::sin(m_angle * core::DEGTORAD);
 538         f32 cos_angle = std::cos(m_angle * core::DEGTORAD);
 539         s32 marker_size2 =  0.025 * (float)size;
 540         for (std::list<v2f>::const_iterator
 541                         i = m_active_markers.begin();
 542                         i != m_active_markers.end(); ++i) {
 543                 v2f posf = *i;
 544                 if (data->minimap_shape_round) {
 545                         f32 t1 = posf.X * cos_angle - posf.Y * sin_angle;
 546                         f32 t2 = posf.X * sin_angle + posf.Y * cos_angle;
 547                         posf.X = t1;
 548                         posf.Y = t2;
 549                 }
 550                 posf.X = (posf.X + 0.5) * (float)size;
 551                 posf.Y = (posf.Y + 0.5) * (float)size;
 552                 core::rect<s32> dest_rect(
 553                         s_pos.X + posf.X - marker_size2,
 554                         s_pos.Y + posf.Y - marker_size2,
 555                         s_pos.X + posf.X + marker_size2,
 556                         s_pos.Y + posf.Y + marker_size2);
 557                 driver->draw2DImage(data->object_marker_red, dest_rect,
 558                         img_rect, &dest_rect, &c[0], true);
 559         }
 560 }
 561
 562 void Minimap::updateActiveMarkers()
 563 {
 564         video::IImage *minimap_mask = data->minimap_shape_round ?
 565                 data->minimap_mask_round : data->minimap_mask_square;
 566
 567         const std::list<Nametag *> &nametags = client->getCamera()->getNametags();
 568
 569         m_active_markers.clear();
 570
 571         for (Nametag *nametag : nametags) {
 572                 v3s16 pos = floatToInt(nametag->parent_node->getAbsolutePosition() +
 573                         intToFloat(client->getCamera()->getOffset(), BS), BS);
 574                 pos -= data->pos - v3s16(data->map_size / 2,
 575                                 data->scan_height / 2,
 576                                 data->map_size / 2);
 577                 if (pos.X < 0 || pos.X > data->map_size ||
 578                                 pos.Y < 0 || pos.Y > data->scan_height ||
 579                                 pos.Z < 0 || pos.Z > data->map_size) {
 580                         continue;
 581                 }
 582                 pos.X = ((float)pos.X / data->map_size) * MINIMAP_MAX_SX;
 583                 pos.Z = ((float)pos.Z / data->map_size) * MINIMAP_MAX_SY;
 584                 const video::SColor &mask_col = minimap_mask->getPixel(pos.X, pos.Z);
 585                 if (!mask_col.getAlpha()) {
 586                         continue;
 587                 }
 588
 589                 m_active_markers.emplace_back(((float)pos.X / (float)MINIMAP_MAX_SX) - 0.5,
 590                         (1.0 - (float)pos.Z / (float)MINIMAP_MAX_SY) - 0.5);
 591         }
 592 }
 593
 594 ////
 595 //// MinimapMapblock
 596 ////
 597
 598 void MinimapMapblock::getMinimapNodes(VoxelManipulator *vmanip, const v3s16 &pos)
 599 {
 600
 601         for (s16 x = 0; x < MAP_BLOCKSIZE; x++)
 602         for (s16 z = 0; z < MAP_BLOCKSIZE; z++) {
 603                 s16 air_count = 0;
 604                 bool surface_found = false;
 605                 MinimapPixel *mmpixel = &data[z * MAP_BLOCKSIZE + x];
 606
 607                 for (s16 y = MAP_BLOCKSIZE -1; y >= 0; y--) {
 608                         v3s16 p(x, y, z);
 609                         MapNode n = vmanip->getNodeNoEx(pos + p);
 610                         if (!surface_found && n.getContent() != CONTENT_AIR) {
 611                                 mmpixel->height = y;
 612                                 mmpixel->n = n;
 613                                 surface_found = true;
 614                         } else if (n.getContent() == CONTENT_AIR) {
 615                                 air_count++;
 616                         }
 617                 }
 618
 619                 if (!surface_found)
 620                         mmpixel->n = MapNode(CONTENT_AIR);
 621
 622                 mmpixel->air_count = air_count;
 623         }
 624 }