src/camera.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010-2011 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 General Public License as published by
   7 the Free Software Foundation; either version 2 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 General Public License for more details.
  14
  15 You should have received a copy of the GNU 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 "camera.h"
  21 #include "debug.h"
  22 #include "client.h"
  23 #include "main.h" // for g_settings
  24 #include "map.h"
  25 #include "player.h"
  26 #include "tile.h"
  27 #include <cmath>
  28 #include <SAnimatedMesh.h>
  29 #include "settings.h"
  30
  31 Camera::Camera(scene::ISceneManager* smgr, MapDrawControl& draw_control):
  32         m_smgr(smgr),
  33         m_playernode(NULL),
  34         m_headnode(NULL),
  35         m_cameranode(NULL),
  36
  37         m_wieldmgr(NULL),
  38         m_wieldnode(NULL),
  39
  40         m_draw_control(draw_control),
  41         m_viewing_range_min(5.0),
  42         m_viewing_range_max(5.0),
  43
  44         m_camera_position(0,0,0),
  45         m_camera_direction(0,0,0),
  46
  47         m_aspect(1.0),
  48         m_fov_x(1.0),
  49         m_fov_y(1.0),
  50
  51         m_wanted_frametime(0.0),
  52         m_added_frametime(0),
  53         m_added_frames(0),
  54         m_range_old(0),
  55         m_frametime_old(0),
  56         m_frametime_counter(0),
  57         m_time_per_range(30. / 50), // a sane default of 30ms per 50 nodes of range
  58
  59         m_view_bobbing_anim(0),
  60         m_view_bobbing_state(0),
  61         m_view_bobbing_speed(0),
  62
  63         m_digging_anim(0),
  64         m_digging_button(-1)
  65 {
  66         //dstream<<__FUNCTION_NAME<<std::endl;
  67
  68         // note: making the camera node a child of the player node
  69         // would lead to unexpected behaviour, so we don't do that.
  70         m_playernode = smgr->addEmptySceneNode(smgr->getRootSceneNode());
  71         m_headnode = smgr->addEmptySceneNode(m_playernode);
  72         m_cameranode = smgr->addCameraSceneNode(smgr->getRootSceneNode());
  73         m_cameranode->bindTargetAndRotation(true);
  74
  75         // This needs to be in its own scene manager. It is drawn after
  76         // all other 3D scene nodes and before the GUI.
  77         m_wieldmgr = smgr->createNewSceneManager();
  78         m_wieldmgr->addCameraSceneNode();
  79         m_wieldnode = new ExtrudedSpriteSceneNode(m_wieldmgr->getRootSceneNode(), m_wieldmgr);
  80
  81         updateSettings();
  82 }
  83
  84 Camera::~Camera()
  85 {
  86         m_wieldmgr->drop();
  87         m_wieldnode->drop();
  88 }
  89
  90 bool Camera::successfullyCreated(std::wstring& error_message)
  91 {
  92         if (m_playernode == NULL)
  93         {
  94                 error_message = L"Failed to create the player scene node";
  95                 return false;
  96         }
  97         if (m_headnode == NULL)
  98         {
  99                 error_message = L"Failed to create the head scene node";
 100                 return false;
 101         }
 102         if (m_cameranode == NULL)
 103         {
 104                 error_message = L"Failed to create the camera scene node";
 105                 return false;
 106         }
 107         if (m_wieldmgr == NULL)
 108         {
 109                 error_message = L"Failed to create the wielded item scene manager";
 110                 return false;
 111         }
 112         if (m_wieldnode == NULL)
 113         {
 114                 error_message = L"Failed to create the wielded item scene node";
 115                 return false;
 116         }
 117         return true;
 118 }
 119
 120 // Returns the fractional part of x
 121 inline f32 my_modf(f32 x)
 122 {
 123         double dummy;
 124         return modf(x, &dummy);
 125 }
 126
 127 void Camera::step(f32 dtime)
 128 {
 129         if (m_view_bobbing_state != 0)
 130         {
 131                 //f32 offset = dtime * m_view_bobbing_speed * 0.035;
 132                 f32 offset = dtime * m_view_bobbing_speed * 0.030;
 133                 if (m_view_bobbing_state == 2)
 134                 {
 135 #if 0
 136                         // Animation is getting turned off
 137                         if (m_view_bobbing_anim < 0.5)
 138                                 m_view_bobbing_anim -= offset;
 139                         else
 140                                 m_view_bobbing_anim += offset;
 141                         if (m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1)
 142                         {
 143                                 m_view_bobbing_anim = 0;
 144                                 m_view_bobbing_state = 0;
 145                         }
 146 #endif
 147 #if 1
 148                         // Animation is getting turned off
 149                         if(m_view_bobbing_anim < 0.25){
 150                                 m_view_bobbing_anim -= offset;
 151                         } else if(m_view_bobbing_anim > 0.75){
 152                                 m_view_bobbing_anim += offset;
 153                         } if(m_view_bobbing_anim < 0.5){
 154                                 m_view_bobbing_anim += offset;
 155                                 if(m_view_bobbing_anim > 0.5)
 156                                         m_view_bobbing_anim = 0.5;
 157                         } else {
 158                                 m_view_bobbing_anim -= offset;
 159                                 if(m_view_bobbing_anim < 0.5)
 160                                         m_view_bobbing_anim = 0.5;
 161                         }
 162                         if(m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1 ||
 163                                         fabs(m_view_bobbing_anim - 0.5) < 0.01)
 164                         {
 165                                 m_view_bobbing_anim = 0;
 166                                 m_view_bobbing_state = 0;
 167                         }
 168 #endif
 169                 }
 170                 else
 171                 {
 172                         m_view_bobbing_anim = my_modf(m_view_bobbing_anim + offset);
 173                 }
 174         }
 175
 176         if (m_digging_button != -1)
 177         {
 178                 f32 offset = dtime * 3.5;
 179                 m_digging_anim += offset;
 180                 if (m_digging_anim >= 1)
 181                 {
 182                         m_digging_anim = 0;
 183                         m_digging_button = -1;
 184                 }
 185         }
 186 }
 187
 188 void Camera::update(LocalPlayer* player, f32 frametime, v2u32 screensize)
 189 {
 190         // Set player node transformation
 191         m_playernode->setPosition(player->getPosition());
 192         m_playernode->setRotation(v3f(0, -1 * player->getYaw(), 0));
 193         m_playernode->updateAbsolutePosition();
 194
 195         // Set head node transformation
 196         m_headnode->setPosition(player->getEyeOffset());
 197         m_headnode->setRotation(v3f(player->getPitch(), 0, 0));
 198         m_headnode->updateAbsolutePosition();
 199
 200         // Compute relative camera position and target
 201         v3f rel_cam_pos = v3f(0,0,0);
 202         v3f rel_cam_target = v3f(0,0,1);
 203         v3f rel_cam_up = v3f(0,1,0);
 204
 205         if (m_view_bobbing_anim != 0)
 206         {
 207                 f32 bobfrac = my_modf(m_view_bobbing_anim * 2);
 208                 f32 bobdir = (m_view_bobbing_anim < 0.5) ? 1.0 : -1.0;
 209
 210                 #if 1
 211                 f32 bobknob = 1.2;
 212                 f32 bobtmp = sin(pow(bobfrac, bobknob) * PI);
 213                 //f32 bobtmp2 = cos(pow(bobfrac, bobknob) * PI);
 214
 215                 v3f bobvec = v3f(
 216                         0.3 * bobdir * sin(bobfrac * PI),
 217                         -0.28 * bobtmp * bobtmp,
 218                         0.);
 219
 220                 //rel_cam_pos += 0.2 * bobvec;
 221                 //rel_cam_target += 0.03 * bobvec;
 222                 //rel_cam_up.rotateXYBy(0.02 * bobdir * bobtmp * PI);
 223                 float f = 1.0;
 224                 rel_cam_pos += bobvec * f;
 225                 //rel_cam_target += 0.995 * bobvec * f;
 226                 rel_cam_target += bobvec * f;
 227                 rel_cam_target.Z -= 0.005 * bobvec.Z * f;
 228                 //rel_cam_target.X -= 0.005 * bobvec.X * f;
 229                 //rel_cam_target.Y -= 0.005 * bobvec.Y * f;
 230                 rel_cam_up.rotateXYBy(-0.03 * bobdir * bobtmp * PI * f);
 231                 #else
 232                 f32 angle_deg = 1 * bobdir * sin(bobfrac * PI);
 233                 f32 angle_rad = angle_deg * PI / 180;
 234                 f32 r = 0.05;
 235                 v3f off = v3f(
 236                         r * sin(angle_rad),
 237                         r * (cos(angle_rad) - 1),
 238                         0);
 239                 rel_cam_pos += off;
 240                 //rel_cam_target += off;
 241                 rel_cam_up.rotateXYBy(angle_deg);
 242                 #endif
 243
 244         }
 245
 246         // Compute absolute camera position and target
 247         m_headnode->getAbsoluteTransformation().transformVect(m_camera_position, rel_cam_pos);
 248         m_headnode->getAbsoluteTransformation().rotateVect(m_camera_direction, rel_cam_target - rel_cam_pos);
 249
 250         v3f abs_cam_up;
 251         m_headnode->getAbsoluteTransformation().rotateVect(abs_cam_up, rel_cam_up);
 252
 253         // Set camera node transformation
 254         m_cameranode->setPosition(m_camera_position);
 255         m_cameranode->setUpVector(abs_cam_up);
 256         // *100.0 helps in large map coordinates
 257         m_cameranode->setTarget(m_camera_position + 100 * m_camera_direction);
 258
 259         // FOV and and aspect ratio
 260         m_aspect = (f32)screensize.X / (f32) screensize.Y;
 261         m_fov_x = 2 * atan(0.5 * m_aspect * tan(m_fov_y));
 262         m_cameranode->setAspectRatio(m_aspect);
 263         m_cameranode->setFOV(m_fov_y);
 264         // Just so big a value that everything rendered is visible
 265         // Some more allowance that m_viewing_range_max * BS because of active objects etc.
 266         m_cameranode->setFarValue(m_viewing_range_max * BS * 10);
 267
 268         // Position the wielded item
 269         v3f wield_position = v3f(45, -35, 65);
 270         v3f wield_rotation = v3f(-100, 110, -100);
 271         if (m_digging_button != -1)
 272         {
 273                 f32 digfrac = m_digging_anim;
 274                 wield_position.X -= 30 * sin(pow(digfrac, 0.8f) * PI);
 275                 wield_position.Y += 15 * sin(digfrac * 2 * PI);
 276                 wield_position.Z += 5 * digfrac;
 277
 278                 // Euler angles are PURE EVIL, so why not use quaternions?
 279                 core::quaternion quat_begin(wield_rotation * core::DEGTORAD);
 280                 core::quaternion quat_end(v3f(90, -10, -130) * core::DEGTORAD);
 281                 core::quaternion quat_slerp;
 282                 quat_slerp.slerp(quat_begin, quat_end, sin(digfrac * PI));
 283                 quat_slerp.toEuler(wield_rotation);
 284                 wield_rotation *= core::RADTODEG;
 285         }
 286         else {
 287                 f32 bobfrac = my_modf(m_view_bobbing_anim);
 288                 wield_position.X -= sin(bobfrac*PI*2.0) * 3.0;
 289                 wield_position.Y += sin(my_modf(bobfrac*2.0)*PI) * 3.0;
 290         }
 291         m_wieldnode->setPosition(wield_position);
 292         m_wieldnode->setRotation(wield_rotation);
 293         m_wieldnode->updateLight(player->light);
 294
 295         // Render distance feedback loop
 296         updateViewingRange(frametime);
 297
 298         // If the player seems to be walking on solid ground,
 299         // view bobbing is enabled and free_move is off,
 300         // start (or continue) the view bobbing animation.
 301         v3f speed = player->getSpeed();
 302         if ((hypot(speed.X, speed.Z) > BS) &&
 303                 (player->touching_ground) &&
 304                 (g_settings->getBool("view_bobbing") == true) &&
 305                 (g_settings->getBool("free_move") == false))
 306         {
 307                 // Start animation
 308                 m_view_bobbing_state = 1;
 309                 m_view_bobbing_speed = MYMIN(speed.getLength(), 40);
 310         }
 311         else if (m_view_bobbing_state == 1)
 312         {
 313                 // Stop animation
 314                 m_view_bobbing_state = 2;
 315                 m_view_bobbing_speed = 60;
 316         }
 317 }
 318
 319 void Camera::updateViewingRange(f32 frametime_in)
 320 {
 321         if (m_draw_control.range_all)
 322                 return;
 323
 324         m_added_frametime += frametime_in;
 325         m_added_frames += 1;
 326
 327         // Actually this counter kind of sucks because frametime is busytime
 328         m_frametime_counter -= frametime_in;
 329         if (m_frametime_counter > 0)
 330                 return;
 331         m_frametime_counter = 0.2;
 332
 333         /*dstream<<__FUNCTION_NAME
 334                         <<": Collected "<<m_added_frames<<" frames, total of "
 335                         <<m_added_frametime<<"s."<<std::endl;
 336
 337         dstream<<"m_draw_control.blocks_drawn="
 338                         <<m_draw_control.blocks_drawn
 339                         <<", m_draw_control.blocks_would_have_drawn="
 340                         <<m_draw_control.blocks_would_have_drawn
 341                         <<std::endl;*/
 342
 343         m_draw_control.wanted_min_range = m_viewing_range_min;
 344         m_draw_control.wanted_max_blocks = (1.5*m_draw_control.blocks_would_have_drawn)+1;
 345         if (m_draw_control.wanted_max_blocks < 10)
 346                 m_draw_control.wanted_max_blocks = 10;
 347
 348         f32 block_draw_ratio = 1.0;
 349         if (m_draw_control.blocks_would_have_drawn != 0)
 350         {
 351                 block_draw_ratio = (f32)m_draw_control.blocks_drawn
 352                         / (f32)m_draw_control.blocks_would_have_drawn;
 353         }
 354
 355         // Calculate the average frametime in the case that all wanted
 356         // blocks had been drawn
 357         f32 frametime = m_added_frametime / m_added_frames / block_draw_ratio;
 358
 359         m_added_frametime = 0.0;
 360         m_added_frames = 0;
 361
 362         f32 wanted_frametime_change = m_wanted_frametime - frametime;
 363         //dstream<<"wanted_frametime_change="<<wanted_frametime_change<<std::endl;
 364
 365         // If needed frametime change is small, just return
 366         if (fabs(wanted_frametime_change) < m_wanted_frametime*0.4)
 367         {
 368                 //dstream<<"ignoring small wanted_frametime_change"<<std::endl;
 369                 return;
 370         }
 371
 372         f32 range = m_draw_control.wanted_range;
 373         f32 new_range = range;
 374
 375         f32 d_range = range - m_range_old;
 376         f32 d_frametime = frametime - m_frametime_old;
 377         if (d_range != 0)
 378         {
 379                 m_time_per_range = d_frametime / d_range;
 380         }
 381
 382         // The minimum allowed calculated frametime-range derivative:
 383         // Practically this sets the maximum speed of changing the range.
 384         // The lower this value, the higher the maximum changing speed.
 385         // A low value here results in wobbly range (0.001)
 386         // A high value here results in slow changing range (0.0025)
 387         // SUGG: This could be dynamically adjusted so that when
 388         //       the camera is turning, this is lower
 389         //f32 min_time_per_range = 0.0015;
 390         f32 min_time_per_range = 0.0010;
 391         //f32 min_time_per_range = 0.05 / range;
 392         if(m_time_per_range < min_time_per_range)
 393         {
 394                 m_time_per_range = min_time_per_range;
 395                 //dstream<<"m_time_per_range="<<m_time_per_range<<" (min)"<<std::endl;
 396         }
 397         else
 398         {
 399                 //dstream<<"m_time_per_range="<<m_time_per_range<<std::endl;
 400         }
 401
 402         f32 wanted_range_change = wanted_frametime_change / m_time_per_range;
 403         // Dampen the change a bit to kill oscillations
 404         //wanted_range_change *= 0.9;
 405         //wanted_range_change *= 0.75;
 406         wanted_range_change *= 0.5;
 407         //dstream<<"wanted_range_change="<<wanted_range_change<<std::endl;
 408
 409         // If needed range change is very small, just return
 410         if(fabs(wanted_range_change) < 0.001)
 411         {
 412                 //dstream<<"ignoring small wanted_range_change"<<std::endl;
 413                 return;
 414         }
 415
 416         new_range += wanted_range_change;
 417
 418         //f32 new_range_unclamped = new_range;
 419         new_range = MYMAX(new_range, m_viewing_range_min);
 420         new_range = MYMIN(new_range, m_viewing_range_max);
 421         /*dstream<<"new_range="<<new_range_unclamped
 422                         <<", clamped to "<<new_range<<std::endl;*/
 423
 424         m_draw_control.wanted_range = new_range;
 425
 426         m_range_old = new_range;
 427         m_frametime_old = frametime;
 428 }
 429
 430 void Camera::updateSettings()
 431 {
 432         m_viewing_range_min = g_settings->getS16("viewing_range_nodes_min");
 433         m_viewing_range_min = MYMAX(5.0, m_viewing_range_min);
 434
 435         m_viewing_range_max = g_settings->getS16("viewing_range_nodes_max");
 436         m_viewing_range_max = MYMAX(m_viewing_range_min, m_viewing_range_max);
 437
 438         f32 fov_degrees = g_settings->getFloat("fov");
 439         fov_degrees = MYMAX(fov_degrees, 10.0);
 440         fov_degrees = MYMIN(fov_degrees, 170.0);
 441         m_fov_y = fov_degrees * PI / 180.0;
 442
 443         f32 wanted_fps = g_settings->getFloat("wanted_fps");
 444         wanted_fps = MYMAX(wanted_fps, 1.0);
 445         m_wanted_frametime = 1.0 / wanted_fps;
 446 }
 447
 448 void Camera::wield(const InventoryItem* item)
 449 {
 450         if (item != NULL)
 451         {
 452                 bool isCube = false;
 453
 454                 // Try to make a MaterialItem cube.
 455                 if (std::string(item->getName()) == "MaterialItem")
 456                 {
 457                         // A block-type material
 458                         MaterialItem* mat_item = (MaterialItem*) item;
 459                         content_t content = mat_item->getMaterial();
 460                         if (content_features(content).solidness || content_features(content).visual_solidness)
 461                         {
 462                                 m_wieldnode->setCube(content_features(content).tiles);
 463                                 m_wieldnode->setScale(v3f(30));
 464                                 isCube = true;
 465                         }
 466                 }
 467
 468                 // If that failed, make an extruded sprite.
 469                 if (!isCube)
 470                 {
 471                         m_wieldnode->setSprite(item->getImageRaw());
 472                         m_wieldnode->setScale(v3f(40));
 473                 }
 474
 475                 m_wieldnode->setVisible(true);
 476         }
 477         else
 478         {
 479                 // Bare hands
 480                 m_wieldnode->setVisible(false);
 481         }
 482 }
 483
 484 void Camera::setDigging(s32 button)
 485 {
 486         if (m_digging_button == -1)
 487                 m_digging_button = button;
 488 }
 489
 490 void Camera::drawWieldedTool()
 491 {
 492         m_wieldmgr->getVideoDriver()->clearZBuffer();
 493
 494         scene::ICameraSceneNode* cam = m_wieldmgr->getActiveCamera();
 495         cam->setAspectRatio(m_cameranode->getAspectRatio());
 496         cam->setFOV(m_cameranode->getFOV());
 497         cam->setNearValue(0.1);
 498         cam->setFarValue(100);
 499         m_wieldmgr->drawAll();
 500 }
 501
 502
 503 ExtrudedSpriteSceneNode::ExtrudedSpriteSceneNode(
 504         scene::ISceneNode* parent,
 505         scene::ISceneManager* mgr,
 506         s32 id,
 507         const v3f& position,
 508         const v3f& rotation,
 509         const v3f& scale
 510 ):
 511         ISceneNode(parent, mgr, id, position, rotation, scale)
 512 {
 513         m_meshnode = mgr->addMeshSceneNode(NULL, this, -1, v3f(0,0,0), v3f(0,0,0), v3f(1,1,1), true);
 514         m_thickness = 0.1;
 515         m_cubemesh = NULL;
 516         m_is_cube = false;
 517         m_light = LIGHT_MAX;
 518 }
 519
 520 ExtrudedSpriteSceneNode::~ExtrudedSpriteSceneNode()
 521 {
 522         removeChild(m_meshnode);
 523         if (m_cubemesh)
 524                 m_cubemesh->drop();
 525 }
 526
 527 void ExtrudedSpriteSceneNode::setSprite(video::ITexture* texture)
 528 {
 529         if (texture == NULL)
 530         {
 531                 m_meshnode->setVisible(false);
 532                 return;
 533         }
 534
 535         io::path name = getExtrudedName(texture);
 536         scene::IMeshCache* cache = SceneManager->getMeshCache();
 537         scene::IAnimatedMesh* mesh = cache->getMeshByName(name);
 538         if (mesh != NULL)
 539         {
 540                 // Extruded texture has been found in cache.
 541                 m_meshnode->setMesh(mesh);
 542         }
 543         else
 544         {
 545                 // Texture was not yet extruded, do it now and save in cache
 546                 mesh = extrude(texture);
 547                 if (mesh == NULL)
 548                 {
 549                         dstream << "Warning: failed to extrude sprite" << std::endl;
 550                         m_meshnode->setVisible(false);
 551                         return;
 552                 }
 553                 cache->addMesh(name, mesh);
 554                 m_meshnode->setMesh(mesh);
 555                 mesh->drop();
 556         }
 557
 558         m_meshnode->setScale(v3f(1, 1, m_thickness));
 559         m_meshnode->getMaterial(0).setTexture(0, texture);
 560         m_meshnode->getMaterial(0).setFlag(video::EMF_LIGHTING, false);
 561         m_meshnode->getMaterial(0).setFlag(video::EMF_BILINEAR_FILTER, false);
 562         m_meshnode->getMaterial(0).MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 563         m_meshnode->setVisible(true);
 564         m_is_cube = false;
 565         updateLight(m_light);
 566 }
 567
 568 void ExtrudedSpriteSceneNode::setCube(const TileSpec tiles[6])
 569 {
 570         if (m_cubemesh == NULL)
 571                 m_cubemesh = createCubeMesh();
 572
 573         m_meshnode->setMesh(m_cubemesh);
 574         m_meshnode->setScale(v3f(1));
 575         for (int i = 0; i < 6; ++i)
 576         {
 577                 // Get the tile texture and atlas transformation
 578                 video::ITexture* atlas = tiles[i].texture.atlas;
 579                 v2f pos = tiles[i].texture.pos;
 580                 v2f size = tiles[i].texture.size;
 581
 582                 // Set material flags and texture
 583                 video::SMaterial& material = m_meshnode->getMaterial(i);
 584                 material.setFlag(video::EMF_LIGHTING, false);
 585                 material.setFlag(video::EMF_BILINEAR_FILTER, false);
 586                 tiles[i].applyMaterialOptions(material);
 587                 material.setTexture(0, atlas);
 588                 material.getTextureMatrix(0).setTextureTranslate(pos.X, pos.Y);
 589                 material.getTextureMatrix(0).setTextureScale(size.X, size.Y);
 590         }
 591         m_meshnode->setVisible(true);
 592         m_is_cube = true;
 593         updateLight(m_light);
 594 }
 595
 596 void ExtrudedSpriteSceneNode::updateLight(u8 light)
 597 {
 598         m_light = light;
 599
 600         u8 li = decode_light(light);
 601         // Set brightness one lower than incoming light
 602         diminish_light(li);
 603         video::SColor color(255,li,li,li);
 604         setMeshVerticesColor(m_meshnode->getMesh(), color);
 605 }
 606
 607 void ExtrudedSpriteSceneNode::removeSpriteFromCache(video::ITexture* texture)
 608 {
 609         scene::IMeshCache* cache = SceneManager->getMeshCache();
 610         scene::IAnimatedMesh* mesh = cache->getMeshByName(getExtrudedName(texture));
 611         if (mesh != NULL)
 612                 cache->removeMesh(mesh);
 613 }
 614
 615 void ExtrudedSpriteSceneNode::setSpriteThickness(f32 thickness)
 616 {
 617         m_thickness = thickness;
 618         if (!m_is_cube)
 619                 m_meshnode->setScale(v3f(1, 1, thickness));
 620 }
 621
 622 const core::aabbox3d<f32>& ExtrudedSpriteSceneNode::getBoundingBox() const
 623 {
 624         return m_meshnode->getBoundingBox();
 625 }
 626
 627 void ExtrudedSpriteSceneNode::OnRegisterSceneNode()
 628 {
 629         if (IsVisible)
 630                 SceneManager->registerNodeForRendering(this);
 631         ISceneNode::OnRegisterSceneNode();
 632 }
 633
 634 void ExtrudedSpriteSceneNode::render()
 635 {
 636         // do nothing
 637 }
 638
 639 io::path ExtrudedSpriteSceneNode::getExtrudedName(video::ITexture* texture)
 640 {
 641         io::path path = texture->getName();
 642         path.append("/[extruded]");
 643         return path;
 644 }
 645
 646 scene::IAnimatedMesh* ExtrudedSpriteSceneNode::extrudeARGB(u32 width, u32 height, u8* data)
 647 {
 648         const s32 argb_wstep = 4 * width;
 649         const s32 alpha_threshold = 1;
 650
 651         scene::IMeshBuffer* buf = new scene::SMeshBuffer();
 652         video::SColor c(255,255,255,255);
 653
 654         // Front and back
 655         {
 656                 video::S3DVertex vertices[8] =
 657                 {
 658                         video::S3DVertex(-0.5,-0.5,-0.5, 0,0,-1, c, 0,1),
 659                         video::S3DVertex(-0.5,+0.5,-0.5, 0,0,-1, c, 0,0),
 660                         video::S3DVertex(+0.5,+0.5,-0.5, 0,0,-1, c, 1,0),
 661                         video::S3DVertex(+0.5,-0.5,-0.5, 0,0,-1, c, 1,1),
 662                         video::S3DVertex(+0.5,-0.5,+0.5, 0,0,+1, c, 1,1),
 663                         video::S3DVertex(+0.5,+0.5,+0.5, 0,0,+1, c, 1,0),
 664                         video::S3DVertex(-0.5,+0.5,+0.5, 0,0,+1, c, 0,0),
 665                         video::S3DVertex(-0.5,-0.5,+0.5, 0,0,+1, c, 0,1),
 666                 };
 667                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
 668                 buf->append(vertices, 8, indices, 12);
 669         }
 670
 671         // "Interior"
 672         // (add faces where a solid pixel is next to a transparent one)
 673         u8* solidity = new u8[(width+2) * (height+2)];
 674         u32 wstep = width + 2;
 675         for (u32 y = 0; y < height + 2; ++y)
 676         {
 677                 u8* scanline = solidity + y * wstep;
 678                 if (y == 0 || y == height + 1)
 679                 {
 680                         for (u32 x = 0; x < width + 2; ++x)
 681                                 scanline[x] = 0;
 682                 }
 683                 else
 684                 {
 685                         scanline[0] = 0;
 686                         u8* argb_scanline = data + (y - 1) * argb_wstep;
 687                         for (u32 x = 0; x < width; ++x)
 688                                 scanline[x+1] = (argb_scanline[x*4+3] >= alpha_threshold);
 689                         scanline[width + 1] = 0;
 690                 }
 691         }
 692
 693         // without this, there would be occasional "holes" in the mesh
 694         f32 eps = 0.01;
 695
 696         for (u32 y = 0; y <= height; ++y)
 697         {
 698                 u8* scanline = solidity + y * wstep + 1;
 699                 for (u32 x = 0; x <= width; ++x)
 700                 {
 701                         if (scanline[x] && !scanline[x + wstep])
 702                         {
 703                                 u32 xx = x + 1;
 704                                 while (scanline[xx] && !scanline[xx + wstep])
 705                                         ++xx;
 706                                 f32 vx1 = (x - eps) / (f32) width - 0.5;
 707                                 f32 vx2 = (xx + eps) / (f32) width - 0.5;
 708                                 f32 vy = 0.5 - (y - eps) / (f32) height;
 709                                 f32 tx1 = x / (f32) width;
 710                                 f32 tx2 = xx / (f32) width;
 711                                 f32 ty = (y - 0.5) / (f32) height;
 712                                 video::S3DVertex vertices[8] =
 713                                 {
 714                                         video::S3DVertex(vx1,vy,-0.5, 0,-1,0, c, tx1,ty),
 715                                         video::S3DVertex(vx2,vy,-0.5, 0,-1,0, c, tx2,ty),
 716                                         video::S3DVertex(vx2,vy,+0.5, 0,-1,0, c, tx2,ty),
 717                                         video::S3DVertex(vx1,vy,+0.5, 0,-1,0, c, tx1,ty),
 718                                 };
 719                                 u16 indices[6] = {0,1,2,2,3,0};
 720                                 buf->append(vertices, 4, indices, 6);
 721                                 x = xx - 1;
 722                         }
 723                         if (!scanline[x] && scanline[x + wstep])
 724                         {
 725                                 u32 xx = x + 1;
 726                                 while (!scanline[xx] && scanline[xx + wstep])
 727                                         ++xx;
 728                                 f32 vx1 = (x - eps) / (f32) width - 0.5;
 729                                 f32 vx2 = (xx + eps) / (f32) width - 0.5;
 730                                 f32 vy = 0.5 - (y + eps) / (f32) height;
 731                                 f32 tx1 = x / (f32) width;
 732                                 f32 tx2 = xx / (f32) width;
 733                                 f32 ty = (y + 0.5) / (f32) height;
 734                                 video::S3DVertex vertices[8] =
 735                                 {
 736                                         video::S3DVertex(vx1,vy,-0.5, 0,1,0, c, tx1,ty),
 737                                         video::S3DVertex(vx1,vy,+0.5, 0,1,0, c, tx1,ty),
 738                                         video::S3DVertex(vx2,vy,+0.5, 0,1,0, c, tx2,ty),
 739                                         video::S3DVertex(vx2,vy,-0.5, 0,1,0, c, tx2,ty),
 740                                 };
 741                                 u16 indices[6] = {0,1,2,2,3,0};
 742                                 buf->append(vertices, 4, indices, 6);
 743                                 x = xx - 1;
 744                         }
 745                 }
 746         }
 747
 748         for (u32 x = 0; x <= width; ++x)
 749         {
 750                 u8* scancol = solidity + x + wstep;
 751                 for (u32 y = 0; y <= height; ++y)
 752                 {
 753                         if (scancol[y * wstep] && !scancol[y * wstep + 1])
 754                         {
 755                                 u32 yy = y + 1;
 756                                 while (scancol[yy * wstep] && !scancol[yy * wstep + 1])
 757                                         ++yy;
 758                                 f32 vx = (x - eps) / (f32) width - 0.5;
 759                                 f32 vy1 = 0.5 - (y - eps) / (f32) height;
 760                                 f32 vy2 = 0.5 - (yy + eps) / (f32) height;
 761                                 f32 tx = (x - 0.5) / (f32) width;
 762                                 f32 ty1 = y / (f32) height;
 763                                 f32 ty2 = yy / (f32) height;
 764                                 video::S3DVertex vertices[8] =
 765                                 {
 766                                         video::S3DVertex(vx,vy1,-0.5, 1,0,0, c, tx,ty1),
 767                                         video::S3DVertex(vx,vy1,+0.5, 1,0,0, c, tx,ty1),
 768                                         video::S3DVertex(vx,vy2,+0.5, 1,0,0, c, tx,ty2),
 769                                         video::S3DVertex(vx,vy2,-0.5, 1,0,0, c, tx,ty2),
 770                                 };
 771                                 u16 indices[6] = {0,1,2,2,3,0};
 772                                 buf->append(vertices, 4, indices, 6);
 773                                 y = yy - 1;
 774                         }
 775                         if (!scancol[y * wstep] && scancol[y * wstep + 1])
 776                         {
 777                                 u32 yy = y + 1;
 778                                 while (!scancol[yy * wstep] && scancol[yy * wstep + 1])
 779                                         ++yy;
 780                                 f32 vx = (x + eps) / (f32) width - 0.5;
 781                                 f32 vy1 = 0.5 - (y - eps) / (f32) height;
 782                                 f32 vy2 = 0.5 - (yy + eps) / (f32) height;
 783                                 f32 tx = (x + 0.5) / (f32) width;
 784                                 f32 ty1 = y / (f32) height;
 785                                 f32 ty2 = yy / (f32) height;
 786                                 video::S3DVertex vertices[8] =
 787                                 {
 788                                         video::S3DVertex(vx,vy1,-0.5, -1,0,0, c, tx,ty1),
 789                                         video::S3DVertex(vx,vy2,-0.5, -1,0,0, c, tx,ty2),
 790                                         video::S3DVertex(vx,vy2,+0.5, -1,0,0, c, tx,ty2),
 791                                         video::S3DVertex(vx,vy1,+0.5, -1,0,0, c, tx,ty1),
 792                                 };
 793                                 u16 indices[6] = {0,1,2,2,3,0};
 794                                 buf->append(vertices, 4, indices, 6);
 795                                 y = yy - 1;
 796                         }
 797                 }
 798         }
 799
 800         // Add to mesh
 801         scene::SMesh* mesh = new scene::SMesh();
 802         buf->recalculateBoundingBox();
 803         mesh->addMeshBuffer(buf);
 804         buf->drop();
 805         mesh->recalculateBoundingBox();
 806         scene::SAnimatedMesh* anim_mesh = new scene::SAnimatedMesh(mesh);
 807         mesh->drop();
 808         return anim_mesh;
 809 }
 810
 811 scene::IAnimatedMesh* ExtrudedSpriteSceneNode::extrude(video::ITexture* texture)
 812 {
 813         scene::IAnimatedMesh* mesh = NULL;
 814         core::dimension2d<u32> size = texture->getSize();
 815         video::ECOLOR_FORMAT format = texture->getColorFormat();
 816         if (format == video::ECF_A8R8G8B8)
 817         {
 818                 // Texture is in the correct color format, we can pass it
 819                 // to extrudeARGB right away.
 820                 void* data = texture->lock(true);
 821                 if (data == NULL)
 822                         return NULL;
 823                 mesh = extrudeARGB(size.Width, size.Height, (u8*) data);
 824                 texture->unlock();
 825         }
 826         else
 827         {
 828                 video::IVideoDriver* driver = SceneManager->getVideoDriver();
 829
 830                 video::IImage* img1 = driver->createImageFromData(format, size, texture->lock(true));
 831                 if (img1 == NULL)
 832                         return NULL;
 833
 834                 // img1 is in the texture's color format, convert to 8-bit ARGB
 835                 video::IImage* img2 = driver->createImage(video::ECF_A8R8G8B8, size);
 836                 if (img2 != NULL)
 837                 {
 838                         img1->copyTo(img2);
 839                         img1->drop();
 840
 841                         mesh = extrudeARGB(size.Width, size.Height, (u8*) img2->lock());
 842                         img2->unlock();
 843                         img2->drop();
 844                 }
 845                 img1->drop();
 846         }
 847         return mesh;
 848 }
 849
 850 scene::IMesh* ExtrudedSpriteSceneNode::createCubeMesh()
 851 {
 852         video::SColor c(255,255,255,255);
 853         video::S3DVertex vertices[24] =
 854         {
 855                 // Up
 856                 video::S3DVertex(-0.5,+0.5,-0.5, 0,1,0, c, 0,1),
 857                 video::S3DVertex(-0.5,+0.5,+0.5, 0,1,0, c, 0,0),
 858                 video::S3DVertex(+0.5,+0.5,+0.5, 0,1,0, c, 1,0),
 859                 video::S3DVertex(+0.5,+0.5,-0.5, 0,1,0, c, 1,1),
 860                 // Down
 861                 video::S3DVertex(-0.5,-0.5,-0.5, 0,-1,0, c, 0,0),
 862                 video::S3DVertex(+0.5,-0.5,-0.5, 0,-1,0, c, 1,0),
 863                 video::S3DVertex(+0.5,-0.5,+0.5, 0,-1,0, c, 1,1),
 864                 video::S3DVertex(-0.5,-0.5,+0.5, 0,-1,0, c, 0,1),
 865                 // Right
 866                 video::S3DVertex(+0.5,-0.5,-0.5, 1,0,0, c, 0,1),
 867                 video::S3DVertex(+0.5,+0.5,-0.5, 1,0,0, c, 0,0),
 868                 video::S3DVertex(+0.5,+0.5,+0.5, 1,0,0, c, 1,0),
 869                 video::S3DVertex(+0.5,-0.5,+0.5, 1,0,0, c, 1,1),
 870                 // Left
 871                 video::S3DVertex(-0.5,-0.5,-0.5, -1,0,0, c, 1,1),
 872                 video::S3DVertex(-0.5,-0.5,+0.5, -1,0,0, c, 0,1),
 873                 video::S3DVertex(-0.5,+0.5,+0.5, -1,0,0, c, 0,0),
 874                 video::S3DVertex(-0.5,+0.5,-0.5, -1,0,0, c, 1,0),
 875                 // Back
 876                 video::S3DVertex(-0.5,-0.5,+0.5, 0,0,1, c, 1,1),
 877                 video::S3DVertex(+0.5,-0.5,+0.5, 0,0,1, c, 0,1),
 878                 video::S3DVertex(+0.5,+0.5,+0.5, 0,0,1, c, 0,0),
 879                 video::S3DVertex(-0.5,+0.5,+0.5, 0,0,1, c, 1,0),
 880                 // Front
 881                 video::S3DVertex(-0.5,-0.5,-0.5, 0,0,-1, c, 0,1),
 882                 video::S3DVertex(-0.5,+0.5,-0.5, 0,0,-1, c, 0,0),
 883                 video::S3DVertex(+0.5,+0.5,-0.5, 0,0,-1, c, 1,0),
 884                 video::S3DVertex(+0.5,-0.5,-0.5, 0,0,-1, c, 1,1),
 885         };
 886
 887         u16 indices[6] = {0,1,2,2,3,0};
 888
 889         scene::SMesh* mesh = new scene::SMesh();
 890         for (u32 i=0; i<6; ++i)
 891         {
 892                 scene::IMeshBuffer* buf = new scene::SMeshBuffer();
 893                 buf->append(vertices + 4 * i, 4, indices, 6);
 894                 buf->recalculateBoundingBox();
 895                 mesh->addMeshBuffer(buf);
 896                 buf->drop();
 897         }
 898         mesh->recalculateBoundingBox();
 899         return mesh;
 900 }