src/camera.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "camera.h"
  21 #include "debug.h"
  22 #include "client.h"
  23 #include "main.h" // for g_settings
  24 #include "map.h"
  25 #include "clientmap.h" // MapDrawControl
  26 #include "mesh.h"
  27 #include "player.h"
  28 #include "tile.h"
  29 #include <cmath>
  30 #include "settings.h"
  31 #include "itemdef.h" // For wield visualization
  32 #include "noise.h" // easeCurve
  33 #include "gamedef.h"
  34 #include "sound.h"
  35 #include "event.h"
  36 #include "profiler.h"
  37 #include "util/numeric.h"
  38 #include "util/mathconstants.h"
  39 #include "constants.h"
  40
  41 #define CAMERA_OFFSET_STEP 200
  42
  43 #include "nodedef.h"
  44
  45 Camera::Camera(scene::ISceneManager* smgr, MapDrawControl& draw_control,
  46                 IGameDef *gamedef):
  47         m_playernode(NULL),
  48         m_headnode(NULL),
  49         m_cameranode(NULL),
  50
  51         m_wieldmgr(NULL),
  52         m_wieldnode(NULL),
  53         m_wieldlight(0),
  54
  55         m_draw_control(draw_control),
  56         m_gamedef(gamedef),
  57
  58         m_camera_position(0,0,0),
  59         m_camera_direction(0,0,0),
  60         m_camera_offset(0,0,0),
  61
  62         m_aspect(1.0),
  63         m_fov_x(1.0),
  64         m_fov_y(1.0),
  65
  66         m_added_busytime(0),
  67         m_added_frames(0),
  68         m_range_old(0),
  69         m_busytime_old(0),
  70         m_frametime_counter(0),
  71         m_time_per_range(30. / 50), // a sane default of 30ms per 50 nodes of range
  72
  73         m_view_bobbing_anim(0),
  74         m_view_bobbing_state(0),
  75         m_view_bobbing_speed(0),
  76         m_view_bobbing_fall(0),
  77
  78         m_digging_anim(0),
  79         m_digging_button(-1),
  80         m_dummymesh(createCubeMesh(v3f(1,1,1))),
  81
  82         m_wield_change_timer(0.125),
  83         m_wield_mesh_next(NULL),
  84         m_previous_playeritem(-1),
  85         m_previous_itemname(""),
  86
  87         m_camera_mode(CAMERA_MODE_FIRST)
  88 {
  89         //dstream<<__FUNCTION_NAME<<std::endl;
  90
  91         // note: making the camera node a child of the player node
  92         // would lead to unexpected behaviour, so we don't do that.
  93         m_playernode = smgr->addEmptySceneNode(smgr->getRootSceneNode());
  94         m_headnode = smgr->addEmptySceneNode(m_playernode);
  95         m_cameranode = smgr->addCameraSceneNode(smgr->getRootSceneNode());
  96         m_cameranode->bindTargetAndRotation(true);
  97
  98         // This needs to be in its own scene manager. It is drawn after
  99         // all other 3D scene nodes and before the GUI.
 100         m_wieldmgr = smgr->createNewSceneManager();
 101         m_wieldmgr->addCameraSceneNode();
 102         m_wieldnode = m_wieldmgr->addMeshSceneNode(m_dummymesh, NULL);  // need a dummy mesh
 103 }
 104
 105 Camera::~Camera()
 106 {
 107         m_wieldmgr->drop();
 108
 109         delete m_dummymesh;
 110 }
 111
 112 bool Camera::successfullyCreated(std::wstring& error_message)
 113 {
 114         if (m_playernode == NULL)
 115         {
 116                 error_message = L"Failed to create the player scene node";
 117                 return false;
 118         }
 119         if (m_headnode == NULL)
 120         {
 121                 error_message = L"Failed to create the head scene node";
 122                 return false;
 123         }
 124         if (m_cameranode == NULL)
 125         {
 126                 error_message = L"Failed to create the camera scene node";
 127                 return false;
 128         }
 129         if (m_wieldmgr == NULL)
 130         {
 131                 error_message = L"Failed to create the wielded item scene manager";
 132                 return false;
 133         }
 134         if (m_wieldnode == NULL)
 135         {
 136                 error_message = L"Failed to create the wielded item scene node";
 137                 return false;
 138         }
 139         return true;
 140 }
 141
 142 // Returns the fractional part of x
 143 inline f32 my_modf(f32 x)
 144 {
 145         double dummy;
 146         return modf(x, &dummy);
 147 }
 148
 149 void Camera::step(f32 dtime)
 150 {
 151         if(m_view_bobbing_fall > 0)
 152         {
 153                 m_view_bobbing_fall -= 3 * dtime;
 154                 if(m_view_bobbing_fall <= 0)
 155                         m_view_bobbing_fall = -1; // Mark the effect as finished
 156         }
 157
 158         bool was_under_zero = m_wield_change_timer < 0;
 159         if(m_wield_change_timer < 0.125)
 160                 m_wield_change_timer += dtime;
 161         if(m_wield_change_timer > 0.125)
 162                 m_wield_change_timer = 0.125;
 163
 164         if(m_wield_change_timer >= 0 && was_under_zero)
 165         {
 166                 if(m_wield_mesh_next)
 167                 {
 168                         m_wieldnode->setMesh(m_wield_mesh_next);
 169                         m_wieldnode->setVisible(true);
 170                 } else {
 171                         m_wieldnode->setVisible(false);
 172                 }
 173                 m_wield_mesh_next = NULL;
 174         }
 175
 176         if (m_view_bobbing_state != 0)
 177         {
 178                 //f32 offset = dtime * m_view_bobbing_speed * 0.035;
 179                 f32 offset = dtime * m_view_bobbing_speed * 0.030;
 180                 if (m_view_bobbing_state == 2)
 181                 {
 182 #if 0
 183                         // Animation is getting turned off
 184                         if (m_view_bobbing_anim < 0.5)
 185                                 m_view_bobbing_anim -= offset;
 186                         else
 187                                 m_view_bobbing_anim += offset;
 188                         if (m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1)
 189                         {
 190                                 m_view_bobbing_anim = 0;
 191                                 m_view_bobbing_state = 0;
 192                         }
 193 #endif
 194 #if 1
 195                         // Animation is getting turned off
 196                         if(m_view_bobbing_anim < 0.25)
 197                         {
 198                                 m_view_bobbing_anim -= offset;
 199                         } else if(m_view_bobbing_anim > 0.75) {
 200                                 m_view_bobbing_anim += offset;
 201                         }
 202                         if(m_view_bobbing_anim < 0.5)
 203                         {
 204                                 m_view_bobbing_anim += offset;
 205                                 if(m_view_bobbing_anim > 0.5)
 206                                         m_view_bobbing_anim = 0.5;
 207                         } else {
 208                                 m_view_bobbing_anim -= offset;
 209                                 if(m_view_bobbing_anim < 0.5)
 210                                         m_view_bobbing_anim = 0.5;
 211                         }
 212                         if(m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1 ||
 213                                         fabs(m_view_bobbing_anim - 0.5) < 0.01)
 214                         {
 215                                 m_view_bobbing_anim = 0;
 216                                 m_view_bobbing_state = 0;
 217                         }
 218 #endif
 219                 }
 220                 else
 221                 {
 222                         float was = m_view_bobbing_anim;
 223                         m_view_bobbing_anim = my_modf(m_view_bobbing_anim + offset);
 224                         bool step = (was == 0 ||
 225                                         (was < 0.5f && m_view_bobbing_anim >= 0.5f) ||
 226                                         (was > 0.5f && m_view_bobbing_anim <= 0.5f));
 227                         if(step)
 228                         {
 229                                 MtEvent *e = new SimpleTriggerEvent("ViewBobbingStep");
 230                                 m_gamedef->event()->put(e);
 231                         }
 232                 }
 233         }
 234
 235         if (m_digging_button != -1)
 236         {
 237                 f32 offset = dtime * 3.5;
 238                 float m_digging_anim_was = m_digging_anim;
 239                 m_digging_anim += offset;
 240                 if (m_digging_anim >= 1)
 241                 {
 242                         m_digging_anim = 0;
 243                         m_digging_button = -1;
 244                 }
 245                 float lim = 0.15;
 246                 if(m_digging_anim_was < lim && m_digging_anim >= lim)
 247                 {
 248                         if(m_digging_button == 0)
 249                         {
 250                                 MtEvent *e = new SimpleTriggerEvent("CameraPunchLeft");
 251                                 m_gamedef->event()->put(e);
 252                         } else if(m_digging_button == 1) {
 253                                 MtEvent *e = new SimpleTriggerEvent("CameraPunchRight");
 254                                 m_gamedef->event()->put(e);
 255                         }
 256                 }
 257         }
 258 }
 259
 260 void Camera::update(LocalPlayer* player, f32 frametime, f32 busytime,
 261                 f32 tool_reload_ratio, ClientEnvironment &c_env)
 262 {
 263         // Get player position
 264         // Smooth the movement when walking up stairs
 265         v3f old_player_position = m_playernode->getPosition();
 266         v3f player_position = player->getPosition();
 267         if (player->isAttached && player->parent)
 268                 player_position = player->parent->getPosition();
 269         //if(player->touching_ground && player_position.Y > old_player_position.Y)
 270         if(player->touching_ground &&
 271                         player_position.Y > old_player_position.Y)
 272         {
 273                 f32 oldy = old_player_position.Y;
 274                 f32 newy = player_position.Y;
 275                 f32 t = exp(-23*frametime);
 276                 player_position.Y = oldy * t + newy * (1-t);
 277         }
 278
 279         // Set player node transformation
 280         m_playernode->setPosition(player_position);
 281         m_playernode->setRotation(v3f(0, -1 * player->getYaw(), 0));
 282         m_playernode->updateAbsolutePosition();
 283
 284         // Get camera tilt timer (hurt animation)
 285         float cameratilt = fabs(fabs(player->hurt_tilt_timer-0.75)-0.75);
 286
 287         // Fall bobbing animation
 288         float fall_bobbing = 0;
 289         if(player->camera_impact >= 1 && m_camera_mode < CAMERA_MODE_THIRD)
 290         {
 291                 if(m_view_bobbing_fall == -1) // Effect took place and has finished
 292                         player->camera_impact = m_view_bobbing_fall = 0;
 293                 else if(m_view_bobbing_fall == 0) // Initialize effect
 294                         m_view_bobbing_fall = 1;
 295
 296                 // Convert 0 -> 1 to 0 -> 1 -> 0
 297                 fall_bobbing = m_view_bobbing_fall < 0.5 ? m_view_bobbing_fall * 2 : -(m_view_bobbing_fall - 0.5) * 2 + 1;
 298                 // Smoothen and invert the above
 299                 fall_bobbing = sin(fall_bobbing * 0.5 * M_PI) * -1;
 300                 // Amplify according to the intensity of the impact
 301                 fall_bobbing *= (1 - rangelim(50 / player->camera_impact, 0, 1)) * 5;
 302
 303                 fall_bobbing *= g_settings->getFloat("fall_bobbing_amount");
 304         }
 305
 306         // Calculate players eye offset for different camera modes
 307         v3f PlayerEyeOffset = player->getEyeOffset();
 308         if (m_camera_mode == CAMERA_MODE_FIRST)
 309                 PlayerEyeOffset += player->eye_offset_first;
 310         else
 311                 PlayerEyeOffset += player->eye_offset_third;
 312
 313         // Set head node transformation
 314         m_headnode->setPosition(PlayerEyeOffset+v3f(0,cameratilt*-player->hurt_tilt_strength+fall_bobbing,0));
 315         m_headnode->setRotation(v3f(player->getPitch(), 0, cameratilt*player->hurt_tilt_strength));
 316         m_headnode->updateAbsolutePosition();
 317
 318         // Compute relative camera position and target
 319         v3f rel_cam_pos = v3f(0,0,0);
 320         v3f rel_cam_target = v3f(0,0,1);
 321         v3f rel_cam_up = v3f(0,1,0);
 322
 323         if (m_view_bobbing_anim != 0 && m_camera_mode < CAMERA_MODE_THIRD)
 324         {
 325                 f32 bobfrac = my_modf(m_view_bobbing_anim * 2);
 326                 f32 bobdir = (m_view_bobbing_anim < 0.5) ? 1.0 : -1.0;
 327
 328                 #if 1
 329                 f32 bobknob = 1.2;
 330                 f32 bobtmp = sin(pow(bobfrac, bobknob) * M_PI);
 331                 //f32 bobtmp2 = cos(pow(bobfrac, bobknob) * M_PI);
 332
 333                 v3f bobvec = v3f(
 334                         0.3 * bobdir * sin(bobfrac * M_PI),
 335                         -0.28 * bobtmp * bobtmp,
 336                         0.);
 337
 338                 //rel_cam_pos += 0.2 * bobvec;
 339                 //rel_cam_target += 0.03 * bobvec;
 340                 //rel_cam_up.rotateXYBy(0.02 * bobdir * bobtmp * M_PI);
 341                 float f = 1.0;
 342                 f *= g_settings->getFloat("view_bobbing_amount");
 343                 rel_cam_pos += bobvec * f;
 344                 //rel_cam_target += 0.995 * bobvec * f;
 345                 rel_cam_target += bobvec * f;
 346                 rel_cam_target.Z -= 0.005 * bobvec.Z * f;
 347                 //rel_cam_target.X -= 0.005 * bobvec.X * f;
 348                 //rel_cam_target.Y -= 0.005 * bobvec.Y * f;
 349                 rel_cam_up.rotateXYBy(-0.03 * bobdir * bobtmp * M_PI * f);
 350                 #else
 351                 f32 angle_deg = 1 * bobdir * sin(bobfrac * M_PI);
 352                 f32 angle_rad = angle_deg * M_PI / 180;
 353                 f32 r = 0.05;
 354                 v3f off = v3f(
 355                         r * sin(angle_rad),
 356                         r * (cos(angle_rad) - 1),
 357                         0);
 358                 rel_cam_pos += off;
 359                 //rel_cam_target += off;
 360                 rel_cam_up.rotateXYBy(angle_deg);
 361                 #endif
 362
 363         }
 364
 365         // Compute absolute camera position and target
 366         m_headnode->getAbsoluteTransformation().transformVect(m_camera_position, rel_cam_pos);
 367         m_headnode->getAbsoluteTransformation().rotateVect(m_camera_direction, rel_cam_target - rel_cam_pos);
 368
 369         v3f abs_cam_up;
 370         m_headnode->getAbsoluteTransformation().rotateVect(abs_cam_up, rel_cam_up);
 371
 372         // Seperate camera position for calculation
 373         v3f my_cp = m_camera_position;
 374
 375         // Reposition the camera for third person view
 376         if (m_camera_mode > CAMERA_MODE_FIRST)
 377         {
 378                 if (m_camera_mode == CAMERA_MODE_THIRD_FRONT)
 379                         m_camera_direction *= -1;
 380
 381                 my_cp.Y += 2;
 382
 383                 // Calculate new position
 384                 bool abort = false;
 385                 for (int i = BS; i <= BS*2; i++)
 386                 {
 387                         my_cp.X = m_camera_position.X + m_camera_direction.X*-i;
 388                         my_cp.Z = m_camera_position.Z + m_camera_direction.Z*-i;
 389                         if (i > 12)
 390                                 my_cp.Y = m_camera_position.Y + (m_camera_direction.Y*-i);
 391
 392                         // Prevent camera positioned inside nodes
 393                         INodeDefManager *nodemgr = m_gamedef->ndef();
 394                         MapNode n = c_env.getClientMap().getNodeNoEx(floatToInt(my_cp, BS));
 395                         const ContentFeatures& features = nodemgr->get(n);
 396                         if(features.walkable)
 397                         {
 398                                 my_cp.X += m_camera_direction.X*-1*-BS/2;
 399                                 my_cp.Z += m_camera_direction.Z*-1*-BS/2;
 400                                 my_cp.Y += m_camera_direction.Y*-1*-BS/2;
 401                                 abort = true;
 402                                 break;
 403                         }
 404                 }
 405
 406                 // If node blocks camera position don't move y to heigh
 407                 if (abort && my_cp.Y > player_position.Y+BS*2)
 408                         my_cp.Y = player_position.Y+BS*2;
 409         }
 410
 411         // Update offset if too far away from the center of the map
 412         m_camera_offset.X += CAMERA_OFFSET_STEP*
 413                         (((s16)(my_cp.X/BS) - m_camera_offset.X)/CAMERA_OFFSET_STEP);
 414         m_camera_offset.Y += CAMERA_OFFSET_STEP*
 415                         (((s16)(my_cp.Y/BS) - m_camera_offset.Y)/CAMERA_OFFSET_STEP);
 416         m_camera_offset.Z += CAMERA_OFFSET_STEP*
 417                         (((s16)(my_cp.Z/BS) - m_camera_offset.Z)/CAMERA_OFFSET_STEP);
 418
 419         // Set camera node transformation
 420         m_cameranode->setPosition(my_cp-intToFloat(m_camera_offset, BS));
 421         m_cameranode->setUpVector(abs_cam_up);
 422         // *100.0 helps in large map coordinates
 423         m_cameranode->setTarget(my_cp-intToFloat(m_camera_offset, BS) + 100 * m_camera_direction);
 424
 425         // update the camera position in front-view mode to render blocks behind player
 426         if (m_camera_mode == CAMERA_MODE_THIRD_FRONT)
 427                 m_camera_position = my_cp;
 428
 429         // Get FOV setting
 430         f32 fov_degrees = g_settings->getFloat("fov");
 431         fov_degrees = MYMAX(fov_degrees, 10.0);
 432         fov_degrees = MYMIN(fov_degrees, 170.0);
 433
 434         // FOV and aspect ratio
 435         m_aspect = (f32) porting::getWindowSize().X / (f32) porting::getWindowSize().Y;
 436         m_fov_y = fov_degrees * M_PI / 180.0;
 437         // Increase vertical FOV on lower aspect ratios (<16:10)
 438         m_fov_y *= MYMAX(1.0, MYMIN(1.4, sqrt(16./10. / m_aspect)));
 439         m_fov_x = 2 * atan(m_aspect * tan(0.5 * m_fov_y));
 440         m_cameranode->setAspectRatio(m_aspect);
 441         m_cameranode->setFOV(m_fov_y);
 442
 443         // Position the wielded item
 444         //v3f wield_position = v3f(45, -35, 65);
 445         v3f wield_position = v3f(55, -35, 65);
 446         //v3f wield_rotation = v3f(-100, 120, -100);
 447         v3f wield_rotation = v3f(-100, 120, -100);
 448         if(m_wield_change_timer < 0)
 449                 wield_position.Y -= 40 + m_wield_change_timer*320;
 450         else
 451                 wield_position.Y -= 40 - m_wield_change_timer*320;
 452         if(m_digging_anim < 0.05 || m_digging_anim > 0.5)
 453         {
 454                 f32 frac = 1.0;
 455                 if(m_digging_anim > 0.5)
 456                         frac = 2.0 * (m_digging_anim - 0.5);
 457                 // This value starts from 1 and settles to 0
 458                 f32 ratiothing = pow((1.0f - tool_reload_ratio), 0.5f);
 459                 //f32 ratiothing2 = pow(ratiothing, 0.5f);
 460                 f32 ratiothing2 = (easeCurve(ratiothing*0.5))*2.0;
 461                 wield_position.Y -= frac * 25.0 * pow(ratiothing2, 1.7f);
 462                 //wield_position.Z += frac * 5.0 * ratiothing2;
 463                 wield_position.X -= frac * 35.0 * pow(ratiothing2, 1.1f);
 464                 wield_rotation.Y += frac * 70.0 * pow(ratiothing2, 1.4f);
 465                 //wield_rotation.X -= frac * 15.0 * pow(ratiothing2, 1.4f);
 466                 //wield_rotation.Z += frac * 15.0 * pow(ratiothing2, 1.0f);
 467         }
 468         if (m_digging_button != -1)
 469         {
 470                 f32 digfrac = m_digging_anim;
 471                 wield_position.X -= 50 * sin(pow(digfrac, 0.8f) * M_PI);
 472                 wield_position.Y += 24 * sin(digfrac * 1.8 * M_PI);
 473                 wield_position.Z += 25 * 0.5;
 474
 475                 // Euler angles are PURE EVIL, so why not use quaternions?
 476                 core::quaternion quat_begin(wield_rotation * core::DEGTORAD);
 477                 core::quaternion quat_end(v3f(80, 30, 100) * core::DEGTORAD);
 478                 core::quaternion quat_slerp;
 479                 quat_slerp.slerp(quat_begin, quat_end, sin(digfrac * M_PI));
 480                 quat_slerp.toEuler(wield_rotation);
 481                 wield_rotation *= core::RADTODEG;
 482         } else {
 483                 f32 bobfrac = my_modf(m_view_bobbing_anim);
 484                 wield_position.X -= sin(bobfrac*M_PI*2.0) * 3.0;
 485                 wield_position.Y += sin(my_modf(bobfrac*2.0)*M_PI) * 3.0;
 486         }
 487         m_wieldnode->setPosition(wield_position);
 488         m_wieldnode->setRotation(wield_rotation);
 489         m_wieldlight = player->light;
 490
 491         // Render distance feedback loop
 492         updateViewingRange(frametime, busytime);
 493
 494         // If the player seems to be walking on solid ground,
 495         // view bobbing is enabled and free_move is off,
 496         // start (or continue) the view bobbing animation.
 497         v3f speed = player->getSpeed();
 498         if ((hypot(speed.X, speed.Z) > BS) &&
 499                 (player->touching_ground) &&
 500                 (g_settings->getBool("view_bobbing") == true) &&
 501                 (g_settings->getBool("free_move") == false ||
 502                                 !m_gamedef->checkLocalPrivilege("fly")))
 503         {
 504                 // Start animation
 505                 m_view_bobbing_state = 1;
 506                 m_view_bobbing_speed = MYMIN(speed.getLength(), 40);
 507         }
 508         else if (m_view_bobbing_state == 1)
 509         {
 510                 // Stop animation
 511                 m_view_bobbing_state = 2;
 512                 m_view_bobbing_speed = 60;
 513         }
 514 }
 515
 516 void Camera::updateViewingRange(f32 frametime_in, f32 busytime_in)
 517 {
 518         if (m_draw_control.range_all)
 519                 return;
 520
 521         m_added_busytime += busytime_in;
 522         m_added_frames += 1;
 523
 524         m_frametime_counter -= frametime_in;
 525         if (m_frametime_counter > 0)
 526                 return;
 527         m_frametime_counter = 0.2; // Same as ClientMap::updateDrawList interval
 528
 529         /*dstream<<__FUNCTION_NAME
 530                         <<": Collected "<<m_added_frames<<" frames, total of "
 531                         <<m_added_busytime<<"s."<<std::endl;
 532
 533         dstream<<"m_draw_control.blocks_drawn="
 534                         <<m_draw_control.blocks_drawn
 535                         <<", m_draw_control.blocks_would_have_drawn="
 536                         <<m_draw_control.blocks_would_have_drawn
 537                         <<std::endl;*/
 538
 539         // Get current viewing range and FPS settings
 540         f32 viewing_range_min = g_settings->getS16("viewing_range_nodes_min");
 541         viewing_range_min = MYMAX(15.0, viewing_range_min);
 542
 543         f32 viewing_range_max = g_settings->getS16("viewing_range_nodes_max");
 544         viewing_range_max = MYMAX(viewing_range_min, viewing_range_max);
 545
 546         // Immediately apply hard limits
 547         if(m_draw_control.wanted_range < viewing_range_min)
 548                 m_draw_control.wanted_range = viewing_range_min;
 549         if(m_draw_control.wanted_range > viewing_range_max)
 550                 m_draw_control.wanted_range = viewing_range_max;
 551
 552         // Just so big a value that everything rendered is visible
 553         // Some more allowance than viewing_range_max * BS because of clouds,
 554         // active objects, etc.
 555         if(viewing_range_max < 200*BS)
 556                 m_cameranode->setFarValue(200 * BS * 10);
 557         else
 558                 m_cameranode->setFarValue(viewing_range_max * BS * 10);
 559
 560         f32 wanted_fps = g_settings->getFloat("wanted_fps");
 561         wanted_fps = MYMAX(wanted_fps, 1.0);
 562         f32 wanted_frametime = 1.0 / wanted_fps;
 563
 564         m_draw_control.wanted_min_range = viewing_range_min;
 565         m_draw_control.wanted_max_blocks = (2.0*m_draw_control.blocks_would_have_drawn)+1;
 566         if (m_draw_control.wanted_max_blocks < 10)
 567                 m_draw_control.wanted_max_blocks = 10;
 568
 569         f32 block_draw_ratio = 1.0;
 570         if (m_draw_control.blocks_would_have_drawn != 0)
 571         {
 572                 block_draw_ratio = (f32)m_draw_control.blocks_drawn
 573                         / (f32)m_draw_control.blocks_would_have_drawn;
 574         }
 575
 576         // Calculate the average frametime in the case that all wanted
 577         // blocks had been drawn
 578         f32 frametime = m_added_busytime / m_added_frames / block_draw_ratio;
 579
 580         m_added_busytime = 0.0;
 581         m_added_frames = 0;
 582
 583         f32 wanted_frametime_change = wanted_frametime - frametime;
 584         //dstream<<"wanted_frametime_change="<<wanted_frametime_change<<std::endl;
 585         g_profiler->avg("wanted_frametime_change", wanted_frametime_change);
 586
 587         // If needed frametime change is small, just return
 588         // This value was 0.4 for many months until 2011-10-18 by c55;
 589         if (fabs(wanted_frametime_change) < wanted_frametime*0.33)
 590         {
 591                 //dstream<<"ignoring small wanted_frametime_change"<<std::endl;
 592                 return;
 593         }
 594
 595         f32 range = m_draw_control.wanted_range;
 596         f32 new_range = range;
 597
 598         f32 d_range = range - m_range_old;
 599         f32 d_busytime = busytime_in - m_busytime_old;
 600         if (d_range != 0)
 601         {
 602                 m_time_per_range = d_busytime / d_range;
 603         }
 604         //dstream<<"time_per_range="<<m_time_per_range<<std::endl;
 605         g_profiler->avg("time_per_range", m_time_per_range);
 606
 607         // The minimum allowed calculated frametime-range derivative:
 608         // Practically this sets the maximum speed of changing the range.
 609         // The lower this value, the higher the maximum changing speed.
 610         // A low value here results in wobbly range (0.001)
 611         // A low value can cause oscillation in very nonlinear time/range curves.
 612         // A high value here results in slow changing range (0.0025)
 613         // SUGG: This could be dynamically adjusted so that when
 614         //       the camera is turning, this is lower
 615         //f32 min_time_per_range = 0.0010; // Up to 0.4.7
 616         f32 min_time_per_range = 0.0005;
 617         if(m_time_per_range < min_time_per_range)
 618         {
 619                 m_time_per_range = min_time_per_range;
 620                 //dstream<<"m_time_per_range="<<m_time_per_range<<" (min)"<<std::endl;
 621         }
 622         else
 623         {
 624                 //dstream<<"m_time_per_range="<<m_time_per_range<<std::endl;
 625         }
 626
 627         f32 wanted_range_change = wanted_frametime_change / m_time_per_range;
 628         // Dampen the change a bit to kill oscillations
 629         //wanted_range_change *= 0.9;
 630         //wanted_range_change *= 0.75;
 631         wanted_range_change *= 0.5;
 632         //dstream<<"wanted_range_change="<<wanted_range_change<<std::endl;
 633
 634         // If needed range change is very small, just return
 635         if(fabs(wanted_range_change) < 0.001)
 636         {
 637                 //dstream<<"ignoring small wanted_range_change"<<std::endl;
 638                 return;
 639         }
 640
 641         new_range += wanted_range_change;
 642
 643         //f32 new_range_unclamped = new_range;
 644         new_range = MYMAX(new_range, viewing_range_min);
 645         new_range = MYMIN(new_range, viewing_range_max);
 646         /*dstream<<"new_range="<<new_range_unclamped
 647                         <<", clamped to "<<new_range<<std::endl;*/
 648
 649         m_range_old = m_draw_control.wanted_range;
 650         m_busytime_old = busytime_in;
 651
 652         m_draw_control.wanted_range = new_range;
 653 }
 654
 655 void Camera::setDigging(s32 button)
 656 {
 657         if (m_digging_button == -1)
 658                 m_digging_button = button;
 659 }
 660
 661 void Camera::wield(const ItemStack &item, u16 playeritem)
 662 {
 663         IItemDefManager *idef = m_gamedef->idef();
 664         std::string itemname = item.getDefinition(idef).name;
 665         m_wield_mesh_next = idef->getWieldMesh(itemname, m_gamedef);
 666         if(playeritem != m_previous_playeritem &&
 667                         !(m_previous_itemname == "" && itemname == ""))
 668         {
 669                 m_previous_playeritem = playeritem;
 670                 m_previous_itemname = itemname;
 671                 if(m_wield_change_timer >= 0.125)
 672                         m_wield_change_timer = -0.125;
 673                 else if(m_wield_change_timer > 0)
 674                 {
 675                         m_wield_change_timer = -m_wield_change_timer;
 676                 }
 677         } else {
 678                 if(m_wield_mesh_next) {
 679                         m_wieldnode->setMesh(m_wield_mesh_next);
 680                         m_wieldnode->setVisible(true);
 681                 } else {
 682                         m_wieldnode->setVisible(false);
 683                 }
 684                 m_wield_mesh_next = NULL;
 685                 if(m_previous_itemname != itemname)
 686                 {
 687                         m_previous_itemname = itemname;
 688                         m_wield_change_timer = 0;
 689                 }
 690                 else
 691                         m_wield_change_timer = 0.125;
 692         }
 693 }
 694
 695 void Camera::drawWieldedTool(irr::core::matrix4* translation)
 696 {
 697         // Set vertex colors of wield mesh according to light level
 698         u8 li = m_wieldlight;
 699         video::SColor color(255,li,li,li);
 700         setMeshColor(m_wieldnode->getMesh(), color);
 701
 702         // Clear Z buffer
 703         m_wieldmgr->getVideoDriver()->clearZBuffer();
 704
 705         // Draw the wielded node (in a separate scene manager)
 706         scene::ICameraSceneNode* cam = m_wieldmgr->getActiveCamera();
 707         cam->setAspectRatio(m_cameranode->getAspectRatio());
 708         cam->setFOV(72.0*M_PI/180.0);
 709         cam->setNearValue(0.1);
 710         cam->setFarValue(100);
 711         if (translation != NULL)
 712         {
 713                 irr::core::matrix4 startMatrix = cam->getAbsoluteTransformation();
 714                 irr::core::vector3df focusPoint = (cam->getTarget()
 715                                 - cam->getAbsolutePosition()).setLength(1)
 716                                 + cam->getAbsolutePosition();
 717
 718                 irr::core::vector3df camera_pos =
 719                                 (startMatrix * *translation).getTranslation();
 720                 cam->setPosition(camera_pos);
 721                 cam->setTarget(focusPoint);
 722         }
 723         m_wieldmgr->drawAll();
 724 }