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