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                 if (m_view_bobbing_state == 2)
 131                 {
 132                         // Animation is getting turned off
 133                         if (m_view_bobbing_anim < 0.5)
 134                                 m_view_bobbing_anim -= offset;
 135                         else
 136                                 m_view_bobbing_anim += offset;
 137                         if (m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1)
 138                         {
 139                                 m_view_bobbing_anim = 0;
 140                                 m_view_bobbing_state = 0;
 141                         }
 142                 }
 143                 else
 144                 {
 145                         m_view_bobbing_anim = my_modf(m_view_bobbing_anim + offset);
 146                 }
 147         }
 148
 149         if (m_digging_button != -1)
 150         {
 151                 f32 offset = dtime * 3.5;
 152                 m_digging_anim += offset;
 153                 if (m_digging_anim >= 1)
 154                 {
 155                         m_digging_anim = 0;
 156                         m_digging_button = -1;
 157                 }
 158         }
 159 }
 160
 161 void Camera::update(LocalPlayer* player, f32 frametime, v2u32 screensize)
 162 {
 163         // Set player node transformation
 164         m_playernode->setPosition(player->getPosition());
 165         m_playernode->setRotation(v3f(0, -1 * player->getYaw(), 0));
 166         m_playernode->updateAbsolutePosition();
 167
 168         // Set head node transformation
 169         m_headnode->setPosition(player->getEyeOffset());
 170         m_headnode->setRotation(v3f(player->getPitch(), 0, 0));
 171         m_headnode->updateAbsolutePosition();
 172
 173         // Compute relative camera position and target
 174         v3f rel_cam_pos = v3f(0,0,0);
 175         v3f rel_cam_target = v3f(0,0,1);
 176         v3f rel_cam_up = v3f(0,1,0);
 177
 178         if (m_view_bobbing_anim != 0)
 179         {
 180                 f32 bobfrac = my_modf(m_view_bobbing_anim * 2);
 181                 f32 bobdir = (m_view_bobbing_anim < 0.5) ? 1.0 : -1.0;
 182
 183                 #if 1
 184                 f32 bobknob = 1.2;
 185                 f32 bobtmp = sin(pow(bobfrac, bobknob) * PI);
 186
 187                 v3f bobvec = v3f(
 188                         bobdir * sin(bobfrac * PI),
 189                         0.8 * bobtmp * bobtmp,
 190                         0.);
 191
 192                 rel_cam_pos += 0.03 * bobvec;
 193                 rel_cam_target += 0.045 * bobvec;
 194                 rel_cam_up.rotateXYBy(0.03 * bobdir * bobtmp * PI);
 195                 #else
 196                 f32 angle_deg = 1 * bobdir * sin(bobfrac * PI);
 197                 f32 angle_rad = angle_deg * PI / 180;
 198                 f32 r = 0.05;
 199                 v3f off = v3f(
 200                         r * sin(angle_rad),
 201                         r * (cos(angle_rad) - 1),
 202                         0);
 203                 rel_cam_pos += off;
 204                 //rel_cam_target += off;
 205                 rel_cam_up.rotateXYBy(angle_deg);
 206                 #endif
 207
 208         }
 209
 210         // Compute absolute camera position and target
 211         m_headnode->getAbsoluteTransformation().transformVect(m_camera_position, rel_cam_pos);
 212         m_headnode->getAbsoluteTransformation().rotateVect(m_camera_direction, rel_cam_target - rel_cam_pos);
 213
 214         v3f abs_cam_up;
 215         m_headnode->getAbsoluteTransformation().rotateVect(abs_cam_up, rel_cam_up);
 216
 217         // Set camera node transformation
 218         m_cameranode->setPosition(m_camera_position);
 219         m_cameranode->setUpVector(abs_cam_up);
 220         // *100.0 helps in large map coordinates
 221         m_cameranode->setTarget(m_camera_position + 100 * m_camera_direction);
 222
 223         // FOV and and aspect ratio
 224         m_aspect = (f32)screensize.X / (f32) screensize.Y;
 225         m_fov_x = 2 * atan(0.5 * m_aspect * tan(m_fov_y));
 226         m_cameranode->setAspectRatio(m_aspect);
 227         m_cameranode->setFOV(m_fov_y);
 228         // Just so big a value that everything rendered is visible
 229         // Some more allowance that m_viewing_range_max * BS because of active objects etc.
 230         m_cameranode->setFarValue(m_viewing_range_max * BS * 10);
 231
 232         // Position the wielded item
 233         v3f wield_position = v3f(45, -35, 65);
 234         v3f wield_rotation = v3f(90, -90, -90);
 235         if (m_digging_button != -1)
 236         {
 237                 f32 digfrac = m_digging_anim;
 238                 wield_position.X -= 30 * sin(pow(digfrac, 0.8f) * PI);
 239                 wield_position.Y += 15 * sin(digfrac * 2 * PI);
 240                 wield_position.Z += 5 * digfrac;
 241
 242                 // Euler angles are PURE EVIL, so why not use quaternions?
 243                 core::quaternion quat_begin(wield_rotation * core::DEGTORAD);
 244                 core::quaternion quat_end(v3f(90, 20, -130) * core::DEGTORAD);
 245                 core::quaternion quat_slerp;
 246                 quat_slerp.slerp(quat_begin, quat_end, sin(digfrac * PI));
 247                 quat_slerp.toEuler(wield_rotation);
 248                 wield_rotation *= core::RADTODEG;
 249         }
 250         m_wieldnode->setPosition(wield_position);
 251         m_wieldnode->setRotation(wield_rotation);
 252
 253         // Render distance feedback loop
 254         updateViewingRange(frametime);
 255
 256         // If the player seems to be walking on solid ground,
 257         // view bobbing is enabled and free_move is off,
 258         // start (or continue) the view bobbing animation.
 259         v3f speed = player->getSpeed();
 260         if ((hypot(speed.X, speed.Z) > BS) &&
 261                 (player->touching_ground) &&
 262                 (g_settings.getBool("view_bobbing") == true) &&
 263                 (g_settings.getBool("free_move") == false))
 264         {
 265                 // Start animation
 266                 m_view_bobbing_state = 1;
 267                 m_view_bobbing_speed = MYMIN(speed.getLength(), 40);
 268         }
 269         else if (m_view_bobbing_state == 1)
 270         {
 271                 // Stop animation
 272                 m_view_bobbing_state = 2;
 273                 m_view_bobbing_speed = 60;
 274         }
 275 }
 276
 277 void Camera::updateViewingRange(f32 frametime_in)
 278 {
 279         if (m_draw_control.range_all)
 280                 return;
 281
 282         m_added_frametime += frametime_in;
 283         m_added_frames += 1;
 284
 285         // Actually this counter kind of sucks because frametime is busytime
 286         m_frametime_counter -= frametime_in;
 287         if (m_frametime_counter > 0)
 288                 return;
 289         m_frametime_counter = 0.2;
 290
 291         /*dstream<<__FUNCTION_NAME
 292                         <<": Collected "<<m_added_frames<<" frames, total of "
 293                         <<m_added_frametime<<"s."<<std::endl;
 294
 295         dstream<<"m_draw_control.blocks_drawn="
 296                         <<m_draw_control.blocks_drawn
 297                         <<", m_draw_control.blocks_would_have_drawn="
 298                         <<m_draw_control.blocks_would_have_drawn
 299                         <<std::endl;*/
 300
 301         m_draw_control.wanted_min_range = m_viewing_range_min;
 302         m_draw_control.wanted_max_blocks = (1.5*m_draw_control.blocks_would_have_drawn)+1;
 303         if (m_draw_control.wanted_max_blocks < 10)
 304                 m_draw_control.wanted_max_blocks = 10;
 305
 306         f32 block_draw_ratio = 1.0;
 307         if (m_draw_control.blocks_would_have_drawn != 0)
 308         {
 309                 block_draw_ratio = (f32)m_draw_control.blocks_drawn
 310                         / (f32)m_draw_control.blocks_would_have_drawn;
 311         }
 312
 313         // Calculate the average frametime in the case that all wanted
 314         // blocks had been drawn
 315         f32 frametime = m_added_frametime / m_added_frames / block_draw_ratio;
 316
 317         m_added_frametime = 0.0;
 318         m_added_frames = 0;
 319
 320         f32 wanted_frametime_change = m_wanted_frametime - frametime;
 321         //dstream<<"wanted_frametime_change="<<wanted_frametime_change<<std::endl;
 322
 323         // If needed frametime change is small, just return
 324         if (fabs(wanted_frametime_change) < m_wanted_frametime*0.4)
 325         {
 326                 //dstream<<"ignoring small wanted_frametime_change"<<std::endl;
 327                 return;
 328         }
 329
 330         f32 range = m_draw_control.wanted_range;
 331         f32 new_range = range;
 332
 333         f32 d_range = range - m_range_old;
 334         f32 d_frametime = frametime - m_frametime_old;
 335         if (d_range != 0)
 336         {
 337                 m_time_per_range = d_frametime / d_range;
 338         }
 339
 340         // The minimum allowed calculated frametime-range derivative:
 341         // Practically this sets the maximum speed of changing the range.
 342         // The lower this value, the higher the maximum changing speed.
 343         // A low value here results in wobbly range (0.001)
 344         // A high value here results in slow changing range (0.0025)
 345         // SUGG: This could be dynamically adjusted so that when
 346         //       the camera is turning, this is lower
 347         //f32 min_time_per_range = 0.0015;
 348         f32 min_time_per_range = 0.0010;
 349         //f32 min_time_per_range = 0.05 / range;
 350         if(m_time_per_range < min_time_per_range)
 351         {
 352                 m_time_per_range = min_time_per_range;
 353                 //dstream<<"m_time_per_range="<<m_time_per_range<<" (min)"<<std::endl;
 354         }
 355         else
 356         {
 357                 //dstream<<"m_time_per_range="<<m_time_per_range<<std::endl;
 358         }
 359
 360         f32 wanted_range_change = wanted_frametime_change / m_time_per_range;
 361         // Dampen the change a bit to kill oscillations
 362         //wanted_range_change *= 0.9;
 363         //wanted_range_change *= 0.75;
 364         wanted_range_change *= 0.5;
 365         //dstream<<"wanted_range_change="<<wanted_range_change<<std::endl;
 366
 367         // If needed range change is very small, just return
 368         if(fabs(wanted_range_change) < 0.001)
 369         {
 370                 //dstream<<"ignoring small wanted_range_change"<<std::endl;
 371                 return;
 372         }
 373
 374         new_range += wanted_range_change;
 375
 376         //f32 new_range_unclamped = new_range;
 377         new_range = MYMAX(new_range, m_viewing_range_min);
 378         new_range = MYMIN(new_range, m_viewing_range_max);
 379         /*dstream<<"new_range="<<new_range_unclamped
 380                         <<", clamped to "<<new_range<<std::endl;*/
 381
 382         m_draw_control.wanted_range = new_range;
 383
 384         m_range_old = new_range;
 385         m_frametime_old = frametime;
 386 }
 387
 388 void Camera::updateSettings()
 389 {
 390         m_viewing_range_min = g_settings.getS16("viewing_range_nodes_min");
 391         m_viewing_range_min = MYMAX(5.0, m_viewing_range_min);
 392
 393         m_viewing_range_max = g_settings.getS16("viewing_range_nodes_max");
 394         m_viewing_range_max = MYMAX(m_viewing_range_min, m_viewing_range_max);
 395
 396         f32 fov_degrees = g_settings.getFloat("fov");
 397         fov_degrees = MYMAX(fov_degrees, 10.0);
 398         fov_degrees = MYMIN(fov_degrees, 170.0);
 399         m_fov_y = fov_degrees * PI / 180.0;
 400
 401         f32 wanted_fps = g_settings.getFloat("wanted_fps");
 402         wanted_fps = MYMAX(wanted_fps, 1.0);
 403         m_wanted_frametime = 1.0 / wanted_fps;
 404 }
 405
 406 void Camera::wield(const InventoryItem* item)
 407 {
 408         if (item != NULL)
 409         {
 410                 bool isCube = false;
 411
 412                 // Try to make a MaterialItem cube.
 413                 if (std::string(item->getName()) == "MaterialItem")
 414                 {
 415                         // A block-type material
 416                         MaterialItem* mat_item = (MaterialItem*) item;
 417                         content_t content = mat_item->getMaterial();
 418                         if (content_features(content).solidness || content_features(content).visual_solidness)
 419                         {
 420                                 m_wieldnode->setCube(content_features(content).tiles);
 421                                 m_wieldnode->setScale(v3f(30));
 422                                 isCube = true;
 423                         }
 424                 }
 425
 426                 // If that failed, make an extruded sprite.
 427                 if (!isCube)
 428                 {
 429                         m_wieldnode->setSprite(item->getImageRaw());
 430                         m_wieldnode->setScale(v3f(40));
 431                 }
 432
 433                 m_wieldnode->setVisible(true);
 434         }
 435         else
 436         {
 437                 // Bare hands
 438                 m_wieldnode->setVisible(false);
 439         }
 440 }
 441
 442 void Camera::setDigging(s32 button)
 443 {
 444         if (m_digging_button == -1)
 445                 m_digging_button = button;
 446 }
 447
 448 void Camera::drawWieldedTool()
 449 {
 450         m_wieldmgr->getVideoDriver()->clearZBuffer();
 451
 452         scene::ICameraSceneNode* cam = m_wieldmgr->getActiveCamera();
 453         cam->setAspectRatio(m_cameranode->getAspectRatio());
 454         cam->setFOV(m_cameranode->getFOV());
 455         cam->setNearValue(0.1);
 456         cam->setFarValue(100);
 457         m_wieldmgr->drawAll();
 458 }
 459
 460
 461 ExtrudedSpriteSceneNode::ExtrudedSpriteSceneNode(
 462         scene::ISceneNode* parent,
 463         scene::ISceneManager* mgr,
 464         s32 id,
 465         const v3f& position,
 466         const v3f& rotation,
 467         const v3f& scale
 468 ):
 469         ISceneNode(parent, mgr, id, position, rotation, scale)
 470 {
 471         m_meshnode = mgr->addMeshSceneNode(NULL, this, -1, v3f(0,0,0), v3f(0,0,0), v3f(1,1,1), true);
 472         m_thickness = 0.1;
 473         m_cubemesh = NULL;
 474         m_is_cube = false;
 475 }
 476
 477 ExtrudedSpriteSceneNode::~ExtrudedSpriteSceneNode()
 478 {
 479         removeChild(m_meshnode);
 480         if (m_cubemesh)
 481                 m_cubemesh->drop();
 482 }
 483
 484 void ExtrudedSpriteSceneNode::setSprite(video::ITexture* texture)
 485 {
 486         if (texture == NULL)
 487         {
 488                 m_meshnode->setVisible(false);
 489                 return;
 490         }
 491
 492         io::path name = getExtrudedName(texture);
 493         scene::IMeshCache* cache = SceneManager->getMeshCache();
 494         scene::IAnimatedMesh* mesh = cache->getMeshByName(name);
 495         if (mesh != NULL)
 496         {
 497                 // Extruded texture has been found in cache.
 498                 m_meshnode->setMesh(mesh);
 499         }
 500         else
 501         {
 502                 // Texture was not yet extruded, do it now and save in cache
 503                 mesh = extrude(texture);
 504                 if (mesh == NULL)
 505                 {
 506                         dstream << "Warning: failed to extrude sprite" << std::endl;
 507                         m_meshnode->setVisible(false);
 508                         return;
 509                 }
 510                 cache->addMesh(name, mesh);
 511                 m_meshnode->setMesh(mesh);
 512                 mesh->drop();
 513         }
 514
 515         m_meshnode->setScale(v3f(1, 1, m_thickness));
 516         m_meshnode->getMaterial(0).setTexture(0, texture);
 517         m_meshnode->getMaterial(0).setFlag(video::EMF_LIGHTING, false);
 518         m_meshnode->getMaterial(0).setFlag(video::EMF_BILINEAR_FILTER, false);
 519         m_meshnode->getMaterial(0).MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 520         m_meshnode->setVisible(true);
 521         m_is_cube = false;
 522 }
 523
 524 void ExtrudedSpriteSceneNode::setCube(const TileSpec tiles[6])
 525 {
 526         if (m_cubemesh == NULL)
 527                 m_cubemesh = createCubeMesh();
 528
 529         m_meshnode->setMesh(m_cubemesh);
 530         m_meshnode->setScale(v3f(1));
 531         for (int i = 0; i < 6; ++i)
 532         {
 533                 // Get the tile texture and atlas transformation
 534                 video::ITexture* atlas = tiles[i].texture.atlas;
 535                 v2f pos = tiles[i].texture.pos;
 536                 v2f size = tiles[i].texture.size;
 537
 538                 // Set material flags and texture
 539                 video::SMaterial& material = m_meshnode->getMaterial(i);
 540                 material.setFlag(video::EMF_LIGHTING, false);
 541                 material.setFlag(video::EMF_BILINEAR_FILTER, false);
 542                 tiles[i].applyMaterialOptions(material);
 543                 material.setTexture(0, atlas);
 544                 material.getTextureMatrix(0).setTextureTranslate(pos.X, pos.Y);
 545                 material.getTextureMatrix(0).setTextureScale(size.X, size.Y);
 546         }
 547         m_meshnode->setVisible(true);
 548         m_is_cube = true;
 549 }
 550
 551 void ExtrudedSpriteSceneNode::removeSpriteFromCache(video::ITexture* texture)
 552 {
 553         scene::IMeshCache* cache = SceneManager->getMeshCache();
 554         scene::IAnimatedMesh* mesh = cache->getMeshByName(getExtrudedName(texture));
 555         if (mesh != NULL)
 556                 cache->removeMesh(mesh);
 557 }
 558
 559 void ExtrudedSpriteSceneNode::setSpriteThickness(f32 thickness)
 560 {
 561         m_thickness = thickness;
 562         if (!m_is_cube)
 563                 m_meshnode->setScale(v3f(1, 1, thickness));
 564 }
 565
 566 const core::aabbox3d<f32>& ExtrudedSpriteSceneNode::getBoundingBox() const
 567 {
 568         return m_meshnode->getBoundingBox();
 569 }
 570
 571 void ExtrudedSpriteSceneNode::OnRegisterSceneNode()
 572 {
 573         if (IsVisible)
 574                 SceneManager->registerNodeForRendering(this);
 575         ISceneNode::OnRegisterSceneNode();
 576 }
 577
 578 void ExtrudedSpriteSceneNode::render()
 579 {
 580         // do nothing
 581 }
 582
 583 io::path ExtrudedSpriteSceneNode::getExtrudedName(video::ITexture* texture)
 584 {
 585         io::path path = texture->getName();
 586         path.append("/[extruded]");
 587         return path;
 588 }
 589
 590 scene::IAnimatedMesh* ExtrudedSpriteSceneNode::extrudeARGB(u32 width, u32 height, u8* data)
 591 {
 592         const s32 argb_wstep = 4 * width;
 593         const s32 alpha_threshold = 1;
 594
 595         scene::IMeshBuffer* buf = new scene::SMeshBuffer();
 596         video::SColor c(255,255,255,255);
 597
 598         // Front and back
 599         {
 600                 video::S3DVertex vertices[8] =
 601                 {
 602                         video::S3DVertex(-0.5,-0.5,-0.5, 0,0,-1, c, 0,1),
 603                         video::S3DVertex(-0.5,+0.5,-0.5, 0,0,-1, c, 0,0),
 604                         video::S3DVertex(+0.5,+0.5,-0.5, 0,0,-1, c, 1,0),
 605                         video::S3DVertex(+0.5,-0.5,-0.5, 0,0,-1, c, 1,1),
 606                         video::S3DVertex(+0.5,-0.5,+0.5, 0,0,+1, c, 1,1),
 607                         video::S3DVertex(+0.5,+0.5,+0.5, 0,0,+1, c, 1,0),
 608                         video::S3DVertex(-0.5,+0.5,+0.5, 0,0,+1, c, 0,0),
 609                         video::S3DVertex(-0.5,-0.5,+0.5, 0,0,+1, c, 0,1),
 610                 };
 611                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
 612                 buf->append(vertices, 8, indices, 12);
 613         }
 614
 615         // "Interior"
 616         // (add faces where a solid pixel is next to a transparent one)
 617         u8* solidity = new u8[(width+2) * (height+2)];
 618         u32 wstep = width + 2;
 619         for (u32 y = 0; y < height + 2; ++y)
 620         {
 621                 u8* scanline = solidity + y * wstep;
 622                 if (y == 0 || y == height + 1)
 623                 {
 624                         for (u32 x = 0; x < width + 2; ++x)
 625                                 scanline[x] = 0;
 626                 }
 627                 else
 628                 {
 629                         scanline[0] = 0;
 630                         u8* argb_scanline = data + (y - 1) * argb_wstep;
 631                         for (u32 x = 0; x < width; ++x)
 632                                 scanline[x+1] = (argb_scanline[x*4+3] >= alpha_threshold);
 633                         scanline[width + 1] = 0;
 634                 }
 635         }
 636
 637         // without this, there would be occasional "holes" in the mesh
 638         f32 eps = 0.01;
 639
 640         for (u32 y = 0; y <= height; ++y)
 641         {
 642                 u8* scanline = solidity + y * wstep + 1;
 643                 for (u32 x = 0; x <= width; ++x)
 644                 {
 645                         if (scanline[x] && !scanline[x + wstep])
 646                         {
 647                                 u32 xx = x + 1;
 648                                 while (scanline[xx] && !scanline[xx + wstep])
 649                                         ++xx;
 650                                 f32 vx1 = (x - eps) / (f32) width - 0.5;
 651                                 f32 vx2 = (xx + eps) / (f32) width - 0.5;
 652                                 f32 vy = 0.5 - (y - eps) / (f32) height;
 653                                 f32 tx1 = x / (f32) width;
 654                                 f32 tx2 = xx / (f32) width;
 655                                 f32 ty = (y - 0.5) / (f32) height;
 656                                 video::S3DVertex vertices[8] =
 657                                 {
 658                                         video::S3DVertex(vx1,vy,-0.5, 0,-1,0, c, tx1,ty),
 659                                         video::S3DVertex(vx2,vy,-0.5, 0,-1,0, c, tx2,ty),
 660                                         video::S3DVertex(vx2,vy,+0.5, 0,-1,0, c, tx2,ty),
 661                                         video::S3DVertex(vx1,vy,+0.5, 0,-1,0, c, tx1,ty),
 662                                 };
 663                                 u16 indices[6] = {0,1,2,2,3,0};
 664                                 buf->append(vertices, 4, indices, 6);
 665                                 x = xx - 1;
 666                         }
 667                         if (!scanline[x] && scanline[x + wstep])
 668                         {
 669                                 u32 xx = x + 1;
 670                                 while (!scanline[xx] && scanline[xx + wstep])
 671                                         ++xx;
 672                                 f32 vx1 = (x - eps) / (f32) width - 0.5;
 673                                 f32 vx2 = (xx + eps) / (f32) width - 0.5;
 674                                 f32 vy = 0.5 - (y + eps) / (f32) height;
 675                                 f32 tx1 = x / (f32) width;
 676                                 f32 tx2 = xx / (f32) width;
 677                                 f32 ty = (y + 0.5) / (f32) height;
 678                                 video::S3DVertex vertices[8] =
 679                                 {
 680                                         video::S3DVertex(vx1,vy,-0.5, 0,1,0, c, tx1,ty),
 681                                         video::S3DVertex(vx1,vy,+0.5, 0,1,0, c, tx1,ty),
 682                                         video::S3DVertex(vx2,vy,+0.5, 0,1,0, c, tx2,ty),
 683                                         video::S3DVertex(vx2,vy,-0.5, 0,1,0, c, tx2,ty),
 684                                 };
 685                                 u16 indices[6] = {0,1,2,2,3,0};
 686                                 buf->append(vertices, 4, indices, 6);
 687                                 x = xx - 1;
 688                         }
 689                 }
 690         }
 691
 692         for (u32 x = 0; x <= width; ++x)
 693         {
 694                 u8* scancol = solidity + x + wstep;
 695                 for (u32 y = 0; y <= height; ++y)
 696                 {
 697                         if (scancol[y * wstep] && !scancol[y * wstep + 1])
 698                         {
 699                                 u32 yy = y + 1;
 700                                 while (scancol[yy * wstep] && !scancol[yy * wstep + 1])
 701                                         ++yy;
 702                                 f32 vx = (x - eps) / (f32) width - 0.5;
 703                                 f32 vy1 = 0.5 - (y - eps) / (f32) height;
 704                                 f32 vy2 = 0.5 - (yy + eps) / (f32) height;
 705                                 f32 tx = (x - 0.5) / (f32) width;
 706                                 f32 ty1 = y / (f32) height;
 707                                 f32 ty2 = yy / (f32) height;
 708                                 video::S3DVertex vertices[8] =
 709                                 {
 710                                         video::S3DVertex(vx,vy1,-0.5, 1,0,0, c, tx,ty1),
 711                                         video::S3DVertex(vx,vy1,+0.5, 1,0,0, c, tx,ty1),
 712                                         video::S3DVertex(vx,vy2,+0.5, 1,0,0, c, tx,ty2),
 713                                         video::S3DVertex(vx,vy2,-0.5, 1,0,0, c, tx,ty2),
 714                                 };
 715                                 u16 indices[6] = {0,1,2,2,3,0};
 716                                 buf->append(vertices, 4, indices, 6);
 717                                 y = yy - 1;
 718                         }
 719                         if (!scancol[y * wstep] && scancol[y * wstep + 1])
 720                         {
 721                                 u32 yy = y + 1;
 722                                 while (!scancol[yy * wstep] && scancol[yy * wstep + 1])
 723                                         ++yy;
 724                                 f32 vx = (x + eps) / (f32) width - 0.5;
 725                                 f32 vy1 = 0.5 - (y - eps) / (f32) height;
 726                                 f32 vy2 = 0.5 - (yy + eps) / (f32) height;
 727                                 f32 tx = (x + 0.5) / (f32) width;
 728                                 f32 ty1 = y / (f32) height;
 729                                 f32 ty2 = yy / (f32) height;
 730                                 video::S3DVertex vertices[8] =
 731                                 {
 732                                         video::S3DVertex(vx,vy1,-0.5, -1,0,0, c, tx,ty1),
 733                                         video::S3DVertex(vx,vy2,-0.5, -1,0,0, c, tx,ty2),
 734                                         video::S3DVertex(vx,vy2,+0.5, -1,0,0, c, tx,ty2),
 735                                         video::S3DVertex(vx,vy1,+0.5, -1,0,0, c, tx,ty1),
 736                                 };
 737                                 u16 indices[6] = {0,1,2,2,3,0};
 738                                 buf->append(vertices, 4, indices, 6);
 739                                 y = yy - 1;
 740                         }
 741                 }
 742         }
 743
 744         // Add to mesh
 745         scene::SMesh* mesh = new scene::SMesh();
 746         buf->recalculateBoundingBox();
 747         mesh->addMeshBuffer(buf);
 748         buf->drop();
 749         mesh->recalculateBoundingBox();
 750         scene::SAnimatedMesh* anim_mesh = new scene::SAnimatedMesh(mesh);
 751         mesh->drop();
 752         return anim_mesh;
 753 }
 754
 755 scene::IAnimatedMesh* ExtrudedSpriteSceneNode::extrude(video::ITexture* texture)
 756 {
 757         scene::IAnimatedMesh* mesh = NULL;
 758         core::dimension2d<u32> size = texture->getSize();
 759         video::ECOLOR_FORMAT format = texture->getColorFormat();
 760         if (format == video::ECF_A8R8G8B8)
 761         {
 762                 // Texture is in the correct color format, we can pass it
 763                 // to extrudeARGB right away.
 764                 void* data = texture->lock(true);
 765                 if (data == NULL)
 766                         return NULL;
 767                 mesh = extrudeARGB(size.Width, size.Height, (u8*) data);
 768                 texture->unlock();
 769         }
 770         else
 771         {
 772                 video::IVideoDriver* driver = SceneManager->getVideoDriver();
 773
 774                 video::IImage* img1 = driver->createImageFromData(format, size, texture->lock(true));
 775                 if (img1 == NULL)
 776                         return NULL;
 777
 778                 // img1 is in the texture's color format, convert to 8-bit ARGB
 779                 video::IImage* img2 = driver->createImage(video::ECF_A8R8G8B8, size);
 780                 if (img2 != NULL)
 781                 {
 782                         img1->copyTo(img2);
 783                         img1->drop();
 784
 785                         mesh = extrudeARGB(size.Width, size.Height, (u8*) img2->lock());
 786                         img2->unlock();
 787                         img2->drop();
 788                 }
 789                 img1->drop();
 790         }
 791         return mesh;
 792 }
 793
 794 scene::IMesh* ExtrudedSpriteSceneNode::createCubeMesh()
 795 {
 796         video::SColor c(255,255,255,255);
 797         video::S3DVertex vertices[24] =
 798         {
 799                 // Up
 800                 video::S3DVertex(-0.5,+0.5,-0.5, 0,1,0, c, 0,1),
 801                 video::S3DVertex(-0.5,+0.5,+0.5, 0,1,0, c, 0,0),
 802                 video::S3DVertex(+0.5,+0.5,+0.5, 0,1,0, c, 1,0),
 803                 video::S3DVertex(+0.5,+0.5,-0.5, 0,1,0, c, 1,1),
 804                 // Down
 805                 video::S3DVertex(-0.5,-0.5,-0.5, 0,-1,0, c, 0,0),
 806                 video::S3DVertex(+0.5,-0.5,-0.5, 0,-1,0, c, 1,0),
 807                 video::S3DVertex(+0.5,-0.5,+0.5, 0,-1,0, c, 1,1),
 808                 video::S3DVertex(-0.5,-0.5,+0.5, 0,-1,0, c, 0,1),
 809                 // Right
 810                 video::S3DVertex(+0.5,-0.5,-0.5, 1,0,0, c, 0,1),
 811                 video::S3DVertex(+0.5,+0.5,-0.5, 1,0,0, c, 0,0),
 812                 video::S3DVertex(+0.5,+0.5,+0.5, 1,0,0, c, 1,0),
 813                 video::S3DVertex(+0.5,-0.5,+0.5, 1,0,0, c, 1,1),
 814                 // Left
 815                 video::S3DVertex(-0.5,-0.5,-0.5, -1,0,0, c, 1,1),
 816                 video::S3DVertex(-0.5,-0.5,+0.5, -1,0,0, c, 0,1),
 817                 video::S3DVertex(-0.5,+0.5,+0.5, -1,0,0, c, 0,0),
 818                 video::S3DVertex(-0.5,+0.5,-0.5, -1,0,0, c, 1,0),
 819                 // Back
 820                 video::S3DVertex(-0.5,-0.5,+0.5, 0,0,1, c, 1,1),
 821                 video::S3DVertex(+0.5,-0.5,+0.5, 0,0,1, c, 0,1),
 822                 video::S3DVertex(+0.5,+0.5,+0.5, 0,0,1, c, 0,0),
 823                 video::S3DVertex(-0.5,+0.5,+0.5, 0,0,1, c, 1,0),
 824                 // Front
 825                 video::S3DVertex(-0.5,-0.5,-0.5, 0,0,-1, c, 0,1),
 826                 video::S3DVertex(-0.5,+0.5,-0.5, 0,0,-1, c, 0,0),
 827                 video::S3DVertex(+0.5,+0.5,-0.5, 0,0,-1, c, 1,0),
 828                 video::S3DVertex(+0.5,-0.5,-0.5, 0,0,-1, c, 1,1),
 829         };
 830
 831         u16 indices[6] = {0,1,2,2,3,0};
 832
 833         scene::SMesh* mesh = new scene::SMesh();
 834         for (u32 i=0; i<6; ++i)
 835         {
 836                 scene::IMeshBuffer* buf = new scene::SMeshBuffer();
 837                 buf->append(vertices + 4 * i, 4, indices, 6);
 838                 buf->recalculateBoundingBox();
 839                 mesh->addMeshBuffer(buf);
 840                 buf->drop();
 841         }
 842         mesh->recalculateBoundingBox();
 843         return mesh;
 844 }