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                 f *= g_settings->getFloat("view_bobbing_amount");
 225                 rel_cam_pos += bobvec * f;
 226                 //rel_cam_target += 0.995 * bobvec * f;
 227                 rel_cam_target += bobvec * f;
 228                 rel_cam_target.Z -= 0.005 * bobvec.Z * f;
 229                 //rel_cam_target.X -= 0.005 * bobvec.X * f;
 230                 //rel_cam_target.Y -= 0.005 * bobvec.Y * f;
 231                 rel_cam_up.rotateXYBy(-0.03 * bobdir * bobtmp * PI * f);
 232                 #else
 233                 f32 angle_deg = 1 * bobdir * sin(bobfrac * PI);
 234                 f32 angle_rad = angle_deg * PI / 180;
 235                 f32 r = 0.05;
 236                 v3f off = v3f(
 237                         r * sin(angle_rad),
 238                         r * (cos(angle_rad) - 1),
 239                         0);
 240                 rel_cam_pos += off;
 241                 //rel_cam_target += off;
 242                 rel_cam_up.rotateXYBy(angle_deg);
 243                 #endif
 244
 245         }
 246
 247         // Compute absolute camera position and target
 248         m_headnode->getAbsoluteTransformation().transformVect(m_camera_position, rel_cam_pos);
 249         m_headnode->getAbsoluteTransformation().rotateVect(m_camera_direction, rel_cam_target - rel_cam_pos);
 250
 251         v3f abs_cam_up;
 252         m_headnode->getAbsoluteTransformation().rotateVect(abs_cam_up, rel_cam_up);
 253
 254         // Set camera node transformation
 255         m_cameranode->setPosition(m_camera_position);
 256         m_cameranode->setUpVector(abs_cam_up);
 257         // *100.0 helps in large map coordinates
 258         m_cameranode->setTarget(m_camera_position + 100 * m_camera_direction);
 259
 260         // FOV and and aspect ratio
 261         m_aspect = (f32)screensize.X / (f32) screensize.Y;
 262         m_fov_x = 2 * atan(0.5 * m_aspect * tan(m_fov_y));
 263         m_cameranode->setAspectRatio(m_aspect);
 264         m_cameranode->setFOV(m_fov_y);
 265         // Just so big a value that everything rendered is visible
 266         // Some more allowance that m_viewing_range_max * BS because of active objects etc.
 267         m_cameranode->setFarValue(m_viewing_range_max * BS * 10);
 268
 269         // Position the wielded item
 270         v3f wield_position = v3f(45, -35, 65);
 271         v3f wield_rotation = v3f(-100, 110, -100);
 272         if (m_digging_button != -1)
 273         {
 274                 f32 digfrac = m_digging_anim;
 275                 wield_position.X -= 30 * sin(pow(digfrac, 0.8f) * PI);
 276                 wield_position.Y += 15 * sin(digfrac * 2 * PI);
 277                 wield_position.Z += 5 * digfrac;
 278
 279                 // Euler angles are PURE EVIL, so why not use quaternions?
 280                 core::quaternion quat_begin(wield_rotation * core::DEGTORAD);
 281                 core::quaternion quat_end(v3f(90, -10, -130) * core::DEGTORAD);
 282                 core::quaternion quat_slerp;
 283                 quat_slerp.slerp(quat_begin, quat_end, sin(digfrac * PI));
 284                 quat_slerp.toEuler(wield_rotation);
 285                 wield_rotation *= core::RADTODEG;
 286         }
 287         else {
 288                 f32 bobfrac = my_modf(m_view_bobbing_anim);
 289                 wield_position.X -= sin(bobfrac*PI*2.0) * 3.0;
 290                 wield_position.Y += sin(my_modf(bobfrac*2.0)*PI) * 3.0;
 291         }
 292         m_wieldnode->setPosition(wield_position);
 293         m_wieldnode->setRotation(wield_rotation);
 294         m_wieldnode->updateLight(player->light);
 295
 296         // Render distance feedback loop
 297         updateViewingRange(frametime);
 298
 299         // If the player seems to be walking on solid ground,
 300         // view bobbing is enabled and free_move is off,
 301         // start (or continue) the view bobbing animation.
 302         v3f speed = player->getSpeed();
 303         if ((hypot(speed.X, speed.Z) > BS) &&
 304                 (player->touching_ground) &&
 305                 (g_settings->getBool("view_bobbing") == true) &&
 306                 (g_settings->getBool("free_move") == false))
 307         {
 308                 // Start animation
 309                 m_view_bobbing_state = 1;
 310                 m_view_bobbing_speed = MYMIN(speed.getLength(), 40);
 311         }
 312         else if (m_view_bobbing_state == 1)
 313         {
 314                 // Stop animation
 315                 m_view_bobbing_state = 2;
 316                 m_view_bobbing_speed = 60;
 317         }
 318 }
 319
 320 void Camera::updateViewingRange(f32 frametime_in)
 321 {
 322         if (m_draw_control.range_all)
 323                 return;
 324
 325         m_added_frametime += frametime_in;
 326         m_added_frames += 1;
 327
 328         // Actually this counter kind of sucks because frametime is busytime
 329         m_frametime_counter -= frametime_in;
 330         if (m_frametime_counter > 0)
 331                 return;
 332         m_frametime_counter = 0.2;
 333
 334         /*dstream<<__FUNCTION_NAME
 335                         <<": Collected "<<m_added_frames<<" frames, total of "
 336                         <<m_added_frametime<<"s."<<std::endl;
 337
 338         dstream<<"m_draw_control.blocks_drawn="
 339                         <<m_draw_control.blocks_drawn
 340                         <<", m_draw_control.blocks_would_have_drawn="
 341                         <<m_draw_control.blocks_would_have_drawn
 342                         <<std::endl;*/
 343
 344         m_draw_control.wanted_min_range = m_viewing_range_min;
 345         m_draw_control.wanted_max_blocks = (2.0*m_draw_control.blocks_would_have_drawn)+1;
 346         if (m_draw_control.wanted_max_blocks < 10)
 347                 m_draw_control.wanted_max_blocks = 10;
 348
 349         f32 block_draw_ratio = 1.0;
 350         if (m_draw_control.blocks_would_have_drawn != 0)
 351         {
 352                 block_draw_ratio = (f32)m_draw_control.blocks_drawn
 353                         / (f32)m_draw_control.blocks_would_have_drawn;
 354         }
 355
 356         // Calculate the average frametime in the case that all wanted
 357         // blocks had been drawn
 358         f32 frametime = m_added_frametime / m_added_frames / block_draw_ratio;
 359
 360         m_added_frametime = 0.0;
 361         m_added_frames = 0;
 362
 363         f32 wanted_frametime_change = m_wanted_frametime - frametime;
 364         //dstream<<"wanted_frametime_change="<<wanted_frametime_change<<std::endl;
 365
 366         // If needed frametime change is small, just return
 367         // This value was 0.4 for many months until 2011-10-18 by c55;
 368         // Let's see how this works out.
 369         if (fabs(wanted_frametime_change) < m_wanted_frametime*0.33)
 370         {
 371                 //dstream<<"ignoring small wanted_frametime_change"<<std::endl;
 372                 return;
 373         }
 374
 375         f32 range = m_draw_control.wanted_range;
 376         f32 new_range = range;
 377
 378         f32 d_range = range - m_range_old;
 379         f32 d_frametime = frametime - m_frametime_old;
 380         if (d_range != 0)
 381         {
 382                 m_time_per_range = d_frametime / d_range;
 383         }
 384
 385         // The minimum allowed calculated frametime-range derivative:
 386         // Practically this sets the maximum speed of changing the range.
 387         // The lower this value, the higher the maximum changing speed.
 388         // A low value here results in wobbly range (0.001)
 389         // A high value here results in slow changing range (0.0025)
 390         // SUGG: This could be dynamically adjusted so that when
 391         //       the camera is turning, this is lower
 392         //f32 min_time_per_range = 0.0015;
 393         f32 min_time_per_range = 0.0010;
 394         //f32 min_time_per_range = 0.05 / range;
 395         if(m_time_per_range < min_time_per_range)
 396         {
 397                 m_time_per_range = min_time_per_range;
 398                 //dstream<<"m_time_per_range="<<m_time_per_range<<" (min)"<<std::endl;
 399         }
 400         else
 401         {
 402                 //dstream<<"m_time_per_range="<<m_time_per_range<<std::endl;
 403         }
 404
 405         f32 wanted_range_change = wanted_frametime_change / m_time_per_range;
 406         // Dampen the change a bit to kill oscillations
 407         //wanted_range_change *= 0.9;
 408         //wanted_range_change *= 0.75;
 409         wanted_range_change *= 0.5;
 410         //dstream<<"wanted_range_change="<<wanted_range_change<<std::endl;
 411
 412         // If needed range change is very small, just return
 413         if(fabs(wanted_range_change) < 0.001)
 414         {
 415                 //dstream<<"ignoring small wanted_range_change"<<std::endl;
 416                 return;
 417         }
 418
 419         new_range += wanted_range_change;
 420
 421         //f32 new_range_unclamped = new_range;
 422         new_range = MYMAX(new_range, m_viewing_range_min);
 423         new_range = MYMIN(new_range, m_viewing_range_max);
 424         /*dstream<<"new_range="<<new_range_unclamped
 425                         <<", clamped to "<<new_range<<std::endl;*/
 426
 427         m_draw_control.wanted_range = new_range;
 428
 429         m_range_old = new_range;
 430         m_frametime_old = frametime;
 431 }
 432
 433 void Camera::updateSettings()
 434 {
 435         m_viewing_range_min = g_settings->getS16("viewing_range_nodes_min");
 436         m_viewing_range_min = MYMAX(5.0, m_viewing_range_min);
 437
 438         m_viewing_range_max = g_settings->getS16("viewing_range_nodes_max");
 439         m_viewing_range_max = MYMAX(m_viewing_range_min, m_viewing_range_max);
 440
 441         f32 fov_degrees = g_settings->getFloat("fov");
 442         fov_degrees = MYMAX(fov_degrees, 10.0);
 443         fov_degrees = MYMIN(fov_degrees, 170.0);
 444         m_fov_y = fov_degrees * PI / 180.0;
 445
 446         f32 wanted_fps = g_settings->getFloat("wanted_fps");
 447         wanted_fps = MYMAX(wanted_fps, 1.0);
 448         m_wanted_frametime = 1.0 / wanted_fps;
 449 }
 450
 451 void Camera::wield(const InventoryItem* item)
 452 {
 453         if (item != NULL)
 454         {
 455                 bool isCube = false;
 456
 457                 // Try to make a MaterialItem cube.
 458                 if (std::string(item->getName()) == "MaterialItem")
 459                 {
 460                         // A block-type material
 461                         MaterialItem* mat_item = (MaterialItem*) item;
 462                         content_t content = mat_item->getMaterial();
 463                         if (content_features(content).solidness || content_features(content).visual_solidness)
 464                         {
 465                                 m_wieldnode->setCube(content_features(content).tiles);
 466                                 m_wieldnode->setScale(v3f(30));
 467                                 isCube = true;
 468                         }
 469                 }
 470
 471                 // If that failed, make an extruded sprite.
 472                 if (!isCube)
 473                 {
 474                         m_wieldnode->setSprite(item->getImageRaw());
 475                         m_wieldnode->setScale(v3f(40));
 476                 }
 477
 478                 m_wieldnode->setVisible(true);
 479         }
 480         else
 481         {
 482                 // Bare hands
 483                 m_wieldnode->setVisible(false);
 484         }
 485 }
 486
 487 void Camera::setDigging(s32 button)
 488 {
 489         if (m_digging_button == -1)
 490                 m_digging_button = button;
 491 }
 492
 493 void Camera::drawWieldedTool()
 494 {
 495         m_wieldmgr->getVideoDriver()->clearZBuffer();
 496
 497         scene::ICameraSceneNode* cam = m_wieldmgr->getActiveCamera();
 498         cam->setAspectRatio(m_cameranode->getAspectRatio());
 499         cam->setFOV(m_cameranode->getFOV());
 500         cam->setNearValue(0.1);
 501         cam->setFarValue(100);
 502         m_wieldmgr->drawAll();
 503 }
 504
 505
 506 ExtrudedSpriteSceneNode::ExtrudedSpriteSceneNode(
 507         scene::ISceneNode* parent,
 508         scene::ISceneManager* mgr,
 509         s32 id,
 510         const v3f& position,
 511         const v3f& rotation,
 512         const v3f& scale
 513 ):
 514         ISceneNode(parent, mgr, id, position, rotation, scale)
 515 {
 516         m_meshnode = mgr->addMeshSceneNode(NULL, this, -1, v3f(0,0,0), v3f(0,0,0), v3f(1,1,1), true);
 517         m_thickness = 0.1;
 518         m_cubemesh = NULL;
 519         m_is_cube = false;
 520         m_light = LIGHT_MAX;
 521 }
 522
 523 ExtrudedSpriteSceneNode::~ExtrudedSpriteSceneNode()
 524 {
 525         removeChild(m_meshnode);
 526         if (m_cubemesh)
 527                 m_cubemesh->drop();
 528 }
 529
 530 void ExtrudedSpriteSceneNode::setSprite(video::ITexture* texture)
 531 {
 532         if (texture == NULL)
 533         {
 534                 m_meshnode->setVisible(false);
 535                 return;
 536         }
 537
 538         io::path name = getExtrudedName(texture);
 539         scene::IMeshCache* cache = SceneManager->getMeshCache();
 540         scene::IAnimatedMesh* mesh = cache->getMeshByName(name);
 541         if (mesh != NULL)
 542         {
 543                 // Extruded texture has been found in cache.
 544                 m_meshnode->setMesh(mesh);
 545         }
 546         else
 547         {
 548                 // Texture was not yet extruded, do it now and save in cache
 549                 mesh = extrude(texture);
 550                 if (mesh == NULL)
 551                 {
 552                         dstream << "Warning: failed to extrude sprite" << std::endl;
 553                         m_meshnode->setVisible(false);
 554                         return;
 555                 }
 556                 cache->addMesh(name, mesh);
 557                 m_meshnode->setMesh(mesh);
 558                 mesh->drop();
 559         }
 560
 561         m_meshnode->setScale(v3f(1, 1, m_thickness));
 562         m_meshnode->getMaterial(0).setTexture(0, texture);
 563         m_meshnode->getMaterial(0).setFlag(video::EMF_LIGHTING, false);
 564         m_meshnode->getMaterial(0).setFlag(video::EMF_BILINEAR_FILTER, false);
 565         m_meshnode->getMaterial(0).MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 566         m_meshnode->setVisible(true);
 567         m_is_cube = false;
 568         updateLight(m_light);
 569 }
 570
 571 void ExtrudedSpriteSceneNode::setCube(const TileSpec tiles[6])
 572 {
 573         if (m_cubemesh == NULL)
 574                 m_cubemesh = createCubeMesh();
 575
 576         m_meshnode->setMesh(m_cubemesh);
 577         m_meshnode->setScale(v3f(1));
 578         for (int i = 0; i < 6; ++i)
 579         {
 580                 // Get the tile texture and atlas transformation
 581                 video::ITexture* atlas = tiles[i].texture.atlas;
 582                 v2f pos = tiles[i].texture.pos;
 583                 v2f size = tiles[i].texture.size;
 584
 585                 // Set material flags and texture
 586                 video::SMaterial& material = m_meshnode->getMaterial(i);
 587                 material.setFlag(video::EMF_LIGHTING, false);
 588                 material.setFlag(video::EMF_BILINEAR_FILTER, false);
 589                 tiles[i].applyMaterialOptions(material);
 590                 material.setTexture(0, atlas);
 591                 material.getTextureMatrix(0).setTextureTranslate(pos.X, pos.Y);
 592                 material.getTextureMatrix(0).setTextureScale(size.X, size.Y);
 593         }
 594         m_meshnode->setVisible(true);
 595         m_is_cube = true;
 596         updateLight(m_light);
 597 }
 598
 599 void ExtrudedSpriteSceneNode::updateLight(u8 light)
 600 {
 601         m_light = light;
 602
 603         u8 li = decode_light(light);
 604         // Set brightness one lower than incoming light
 605         diminish_light(li);
 606         video::SColor color(255,li,li,li);
 607         setMeshVerticesColor(m_meshnode->getMesh(), color);
 608 }
 609
 610 void ExtrudedSpriteSceneNode::removeSpriteFromCache(video::ITexture* texture)
 611 {
 612         scene::IMeshCache* cache = SceneManager->getMeshCache();
 613         scene::IAnimatedMesh* mesh = cache->getMeshByName(getExtrudedName(texture));
 614         if (mesh != NULL)
 615                 cache->removeMesh(mesh);
 616 }
 617
 618 void ExtrudedSpriteSceneNode::setSpriteThickness(f32 thickness)
 619 {
 620         m_thickness = thickness;
 621         if (!m_is_cube)
 622                 m_meshnode->setScale(v3f(1, 1, thickness));
 623 }
 624
 625 const core::aabbox3d<f32>& ExtrudedSpriteSceneNode::getBoundingBox() const
 626 {
 627         return m_meshnode->getBoundingBox();
 628 }
 629
 630 void ExtrudedSpriteSceneNode::OnRegisterSceneNode()
 631 {
 632         if (IsVisible)
 633                 SceneManager->registerNodeForRendering(this);
 634         ISceneNode::OnRegisterSceneNode();
 635 }
 636
 637 void ExtrudedSpriteSceneNode::render()
 638 {
 639         // do nothing
 640 }
 641
 642 io::path ExtrudedSpriteSceneNode::getExtrudedName(video::ITexture* texture)
 643 {
 644         io::path path = texture->getName();
 645         path.append("/[extruded]");
 646         return path;
 647 }
 648
 649 scene::IAnimatedMesh* ExtrudedSpriteSceneNode::extrudeARGB(u32 width, u32 height, u8* data)
 650 {
 651         const s32 argb_wstep = 4 * width;
 652         const s32 alpha_threshold = 1;
 653
 654         scene::IMeshBuffer* buf = new scene::SMeshBuffer();
 655         video::SColor c(255,255,255,255);
 656
 657         // Front and back
 658         {
 659                 video::S3DVertex vertices[8] =
 660                 {
 661                         video::S3DVertex(-0.5,-0.5,-0.5, 0,0,-1, c, 0,1),
 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, 1,0),
 664                         video::S3DVertex(+0.5,-0.5,-0.5, 0,0,-1, c, 1,1),
 665                         video::S3DVertex(+0.5,-0.5,+0.5, 0,0,+1, c, 1,1),
 666                         video::S3DVertex(+0.5,+0.5,+0.5, 0,0,+1, c, 1,0),
 667                         video::S3DVertex(-0.5,+0.5,+0.5, 0,0,+1, c, 0,0),
 668                         video::S3DVertex(-0.5,-0.5,+0.5, 0,0,+1, c, 0,1),
 669                 };
 670                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
 671                 buf->append(vertices, 8, indices, 12);
 672         }
 673
 674         // "Interior"
 675         // (add faces where a solid pixel is next to a transparent one)
 676         u8* solidity = new u8[(width+2) * (height+2)];
 677         u32 wstep = width + 2;
 678         for (u32 y = 0; y < height + 2; ++y)
 679         {
 680                 u8* scanline = solidity + y * wstep;
 681                 if (y == 0 || y == height + 1)
 682                 {
 683                         for (u32 x = 0; x < width + 2; ++x)
 684                                 scanline[x] = 0;
 685                 }
 686                 else
 687                 {
 688                         scanline[0] = 0;
 689                         u8* argb_scanline = data + (y - 1) * argb_wstep;
 690                         for (u32 x = 0; x < width; ++x)
 691                                 scanline[x+1] = (argb_scanline[x*4+3] >= alpha_threshold);
 692                         scanline[width + 1] = 0;
 693                 }
 694         }
 695
 696         // without this, there would be occasional "holes" in the mesh
 697         f32 eps = 0.01;
 698
 699         for (u32 y = 0; y <= height; ++y)
 700         {
 701                 u8* scanline = solidity + y * wstep + 1;
 702                 for (u32 x = 0; x <= width; ++x)
 703                 {
 704                         if (scanline[x] && !scanline[x + wstep])
 705                         {
 706                                 u32 xx = x + 1;
 707                                 while (scanline[xx] && !scanline[xx + wstep])
 708                                         ++xx;
 709                                 f32 vx1 = (x - eps) / (f32) width - 0.5;
 710                                 f32 vx2 = (xx + eps) / (f32) width - 0.5;
 711                                 f32 vy = 0.5 - (y - eps) / (f32) height;
 712                                 f32 tx1 = x / (f32) width;
 713                                 f32 tx2 = xx / (f32) width;
 714                                 f32 ty = (y - 0.5) / (f32) height;
 715                                 video::S3DVertex vertices[8] =
 716                                 {
 717                                         video::S3DVertex(vx1,vy,-0.5, 0,-1,0, c, tx1,ty),
 718                                         video::S3DVertex(vx2,vy,-0.5, 0,-1,0, c, tx2,ty),
 719                                         video::S3DVertex(vx2,vy,+0.5, 0,-1,0, c, tx2,ty),
 720                                         video::S3DVertex(vx1,vy,+0.5, 0,-1,0, c, tx1,ty),
 721                                 };
 722                                 u16 indices[6] = {0,1,2,2,3,0};
 723                                 buf->append(vertices, 4, indices, 6);
 724                                 x = xx - 1;
 725                         }
 726                         if (!scanline[x] && scanline[x + wstep])
 727                         {
 728                                 u32 xx = x + 1;
 729                                 while (!scanline[xx] && scanline[xx + wstep])
 730                                         ++xx;
 731                                 f32 vx1 = (x - eps) / (f32) width - 0.5;
 732                                 f32 vx2 = (xx + eps) / (f32) width - 0.5;
 733                                 f32 vy = 0.5 - (y + eps) / (f32) height;
 734                                 f32 tx1 = x / (f32) width;
 735                                 f32 tx2 = xx / (f32) width;
 736                                 f32 ty = (y + 0.5) / (f32) height;
 737                                 video::S3DVertex vertices[8] =
 738                                 {
 739                                         video::S3DVertex(vx1,vy,-0.5, 0,1,0, c, tx1,ty),
 740                                         video::S3DVertex(vx1,vy,+0.5, 0,1,0, c, tx1,ty),
 741                                         video::S3DVertex(vx2,vy,+0.5, 0,1,0, c, tx2,ty),
 742                                         video::S3DVertex(vx2,vy,-0.5, 0,1,0, c, tx2,ty),
 743                                 };
 744                                 u16 indices[6] = {0,1,2,2,3,0};
 745                                 buf->append(vertices, 4, indices, 6);
 746                                 x = xx - 1;
 747                         }
 748                 }
 749         }
 750
 751         for (u32 x = 0; x <= width; ++x)
 752         {
 753                 u8* scancol = solidity + x + wstep;
 754                 for (u32 y = 0; y <= height; ++y)
 755                 {
 756                         if (scancol[y * wstep] && !scancol[y * wstep + 1])
 757                         {
 758                                 u32 yy = y + 1;
 759                                 while (scancol[yy * wstep] && !scancol[yy * wstep + 1])
 760                                         ++yy;
 761                                 f32 vx = (x - eps) / (f32) width - 0.5;
 762                                 f32 vy1 = 0.5 - (y - eps) / (f32) height;
 763                                 f32 vy2 = 0.5 - (yy + eps) / (f32) height;
 764                                 f32 tx = (x - 0.5) / (f32) width;
 765                                 f32 ty1 = y / (f32) height;
 766                                 f32 ty2 = yy / (f32) height;
 767                                 video::S3DVertex vertices[8] =
 768                                 {
 769                                         video::S3DVertex(vx,vy1,-0.5, 1,0,0, c, tx,ty1),
 770                                         video::S3DVertex(vx,vy1,+0.5, 1,0,0, c, tx,ty1),
 771                                         video::S3DVertex(vx,vy2,+0.5, 1,0,0, c, tx,ty2),
 772                                         video::S3DVertex(vx,vy2,-0.5, 1,0,0, c, tx,ty2),
 773                                 };
 774                                 u16 indices[6] = {0,1,2,2,3,0};
 775                                 buf->append(vertices, 4, indices, 6);
 776                                 y = yy - 1;
 777                         }
 778                         if (!scancol[y * wstep] && scancol[y * wstep + 1])
 779                         {
 780                                 u32 yy = y + 1;
 781                                 while (!scancol[yy * wstep] && scancol[yy * wstep + 1])
 782                                         ++yy;
 783                                 f32 vx = (x + eps) / (f32) width - 0.5;
 784                                 f32 vy1 = 0.5 - (y - eps) / (f32) height;
 785                                 f32 vy2 = 0.5 - (yy + eps) / (f32) height;
 786                                 f32 tx = (x + 0.5) / (f32) width;
 787                                 f32 ty1 = y / (f32) height;
 788                                 f32 ty2 = yy / (f32) height;
 789                                 video::S3DVertex vertices[8] =
 790                                 {
 791                                         video::S3DVertex(vx,vy1,-0.5, -1,0,0, c, tx,ty1),
 792                                         video::S3DVertex(vx,vy2,-0.5, -1,0,0, c, tx,ty2),
 793                                         video::S3DVertex(vx,vy2,+0.5, -1,0,0, c, tx,ty2),
 794                                         video::S3DVertex(vx,vy1,+0.5, -1,0,0, c, tx,ty1),
 795                                 };
 796                                 u16 indices[6] = {0,1,2,2,3,0};
 797                                 buf->append(vertices, 4, indices, 6);
 798                                 y = yy - 1;
 799                         }
 800                 }
 801         }
 802
 803         // Add to mesh
 804         scene::SMesh* mesh = new scene::SMesh();
 805         buf->recalculateBoundingBox();
 806         mesh->addMeshBuffer(buf);
 807         buf->drop();
 808         mesh->recalculateBoundingBox();
 809         scene::SAnimatedMesh* anim_mesh = new scene::SAnimatedMesh(mesh);
 810         mesh->drop();
 811         return anim_mesh;
 812 }
 813
 814 scene::IAnimatedMesh* ExtrudedSpriteSceneNode::extrude(video::ITexture* texture)
 815 {
 816         scene::IAnimatedMesh* mesh = NULL;
 817         core::dimension2d<u32> size = texture->getSize();
 818         video::ECOLOR_FORMAT format = texture->getColorFormat();
 819         if (format == video::ECF_A8R8G8B8)
 820         {
 821                 // Texture is in the correct color format, we can pass it
 822                 // to extrudeARGB right away.
 823                 void* data = texture->lock(true);
 824                 if (data == NULL)
 825                         return NULL;
 826                 mesh = extrudeARGB(size.Width, size.Height, (u8*) data);
 827                 texture->unlock();
 828         }
 829         else
 830         {
 831                 video::IVideoDriver* driver = SceneManager->getVideoDriver();
 832
 833                 video::IImage* img1 = driver->createImageFromData(format, size, texture->lock(true));
 834                 if (img1 == NULL)
 835                         return NULL;
 836
 837                 // img1 is in the texture's color format, convert to 8-bit ARGB
 838                 video::IImage* img2 = driver->createImage(video::ECF_A8R8G8B8, size);
 839                 if (img2 != NULL)
 840                 {
 841                         img1->copyTo(img2);
 842                         img1->drop();
 843
 844                         mesh = extrudeARGB(size.Width, size.Height, (u8*) img2->lock());
 845                         img2->unlock();
 846                         img2->drop();
 847                 }
 848                 img1->drop();
 849         }
 850         return mesh;
 851 }
 852
 853 scene::IMesh* ExtrudedSpriteSceneNode::createCubeMesh()
 854 {
 855         video::SColor c(255,255,255,255);
 856         video::S3DVertex vertices[24] =
 857         {
 858                 // Up
 859                 video::S3DVertex(-0.5,+0.5,-0.5, 0,1,0, c, 0,1),
 860                 video::S3DVertex(-0.5,+0.5,+0.5, 0,1,0, c, 0,0),
 861                 video::S3DVertex(+0.5,+0.5,+0.5, 0,1,0, c, 1,0),
 862                 video::S3DVertex(+0.5,+0.5,-0.5, 0,1,0, c, 1,1),
 863                 // Down
 864                 video::S3DVertex(-0.5,-0.5,-0.5, 0,-1,0, c, 0,0),
 865                 video::S3DVertex(+0.5,-0.5,-0.5, 0,-1,0, c, 1,0),
 866                 video::S3DVertex(+0.5,-0.5,+0.5, 0,-1,0, c, 1,1),
 867                 video::S3DVertex(-0.5,-0.5,+0.5, 0,-1,0, c, 0,1),
 868                 // Right
 869                 video::S3DVertex(+0.5,-0.5,-0.5, 1,0,0, c, 0,1),
 870                 video::S3DVertex(+0.5,+0.5,-0.5, 1,0,0, c, 0,0),
 871                 video::S3DVertex(+0.5,+0.5,+0.5, 1,0,0, c, 1,0),
 872                 video::S3DVertex(+0.5,-0.5,+0.5, 1,0,0, c, 1,1),
 873                 // Left
 874                 video::S3DVertex(-0.5,-0.5,-0.5, -1,0,0, c, 1,1),
 875                 video::S3DVertex(-0.5,-0.5,+0.5, -1,0,0, c, 0,1),
 876                 video::S3DVertex(-0.5,+0.5,+0.5, -1,0,0, c, 0,0),
 877                 video::S3DVertex(-0.5,+0.5,-0.5, -1,0,0, c, 1,0),
 878                 // Back
 879                 video::S3DVertex(-0.5,-0.5,+0.5, 0,0,1, c, 1,1),
 880                 video::S3DVertex(+0.5,-0.5,+0.5, 0,0,1, c, 0,1),
 881                 video::S3DVertex(+0.5,+0.5,+0.5, 0,0,1, c, 0,0),
 882                 video::S3DVertex(-0.5,+0.5,+0.5, 0,0,1, c, 1,0),
 883                 // Front
 884                 video::S3DVertex(-0.5,-0.5,-0.5, 0,0,-1, c, 0,1),
 885                 video::S3DVertex(-0.5,+0.5,-0.5, 0,0,-1, c, 0,0),
 886                 video::S3DVertex(+0.5,+0.5,-0.5, 0,0,-1, c, 1,0),
 887                 video::S3DVertex(+0.5,-0.5,-0.5, 0,0,-1, c, 1,1),
 888         };
 889
 890         u16 indices[6] = {0,1,2,2,3,0};
 891
 892         scene::SMesh* mesh = new scene::SMesh();
 893         for (u32 i=0; i<6; ++i)
 894         {
 895                 scene::IMeshBuffer* buf = new scene::SMeshBuffer();
 896                 buf->append(vertices + 4 * i, 4, indices, 6);
 897                 buf->recalculateBoundingBox();
 898                 mesh->addMeshBuffer(buf);
 899                 buf->drop();
 900         }
 901         mesh->recalculateBoundingBox();
 902         return mesh;
 903 }