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 "player.h"
  27 #include <cmath>
  28 #include "settings.h"
  29 #include "wieldmesh.h"
  30 #include "noise.h" // easeCurve
  31 #include "gamedef.h"
  32 #include "sound.h"
  33 #include "event.h"
  34 #include "profiler.h"
  35 #include "util/numeric.h"
  36 #include "util/mathconstants.h"
  37 #include "constants.h"
  38
  39 #define CAMERA_OFFSET_STEP 200
  40
  41 #include "nodedef.h"
  42
  43 Camera::Camera(scene::ISceneManager* smgr, MapDrawControl& draw_control,
  44                 IGameDef *gamedef):
  45         m_playernode(NULL),
  46         m_headnode(NULL),
  47         m_cameranode(NULL),
  48
  49         m_wieldmgr(NULL),
  50         m_wieldnode(NULL),
  51
  52         m_draw_control(draw_control),
  53         m_gamedef(gamedef),
  54
  55         m_camera_position(0,0,0),
  56         m_camera_direction(0,0,0),
  57         m_camera_offset(0,0,0),
  58
  59         m_aspect(1.0),
  60         m_fov_x(1.0),
  61         m_fov_y(1.0),
  62
  63         m_added_busytime(0),
  64         m_added_frames(0),
  65         m_range_old(0),
  66         m_busytime_old(0),
  67         m_frametime_counter(0),
  68         m_time_per_range(30. / 50), // a sane default of 30ms per 50 nodes of range
  69
  70         m_view_bobbing_anim(0),
  71         m_view_bobbing_state(0),
  72         m_view_bobbing_speed(0),
  73         m_view_bobbing_fall(0),
  74
  75         m_digging_anim(0),
  76         m_digging_button(-1),
  77
  78         m_wield_change_timer(0.125),
  79         m_wield_item_next(),
  80
  81         m_camera_mode(CAMERA_MODE_FIRST)
  82 {
  83         //dstream<<__FUNCTION_NAME<<std::endl;
  84
  85         // note: making the camera node a child of the player node
  86         // would lead to unexpected behaviour, so we don't do that.
  87         m_playernode = smgr->addEmptySceneNode(smgr->getRootSceneNode());
  88         m_headnode = smgr->addEmptySceneNode(m_playernode);
  89         m_cameranode = smgr->addCameraSceneNode(smgr->getRootSceneNode());
  90         m_cameranode->bindTargetAndRotation(true);
  91
  92         // This needs to be in its own scene manager. It is drawn after
  93         // all other 3D scene nodes and before the GUI.
  94         m_wieldmgr = smgr->createNewSceneManager();
  95         m_wieldmgr->addCameraSceneNode();
  96         m_wieldnode = new WieldMeshSceneNode(m_wieldmgr->getRootSceneNode(), m_wieldmgr, -1, true);
  97         m_wieldnode->setItem(ItemStack(), m_gamedef);
  98         m_wieldnode->drop(); // m_wieldmgr grabbed it
  99         m_wieldlightnode = m_wieldmgr->addLightSceneNode(NULL, v3f(0.0, 50.0, 0.0));
 100 }
 101
 102 Camera::~Camera()
 103 {
 104         m_wieldmgr->drop();
 105 }
 106
 107 bool Camera::successfullyCreated(std::wstring& error_message)
 108 {
 109         if (m_playernode == NULL)
 110         {
 111                 error_message = L"Failed to create the player scene node";
 112                 return false;
 113         }
 114         if (m_headnode == NULL)
 115         {
 116                 error_message = L"Failed to create the head scene node";
 117                 return false;
 118         }
 119         if (m_cameranode == NULL)
 120         {
 121                 error_message = L"Failed to create the camera scene node";
 122                 return false;
 123         }
 124         if (m_wieldmgr == NULL)
 125         {
 126                 error_message = L"Failed to create the wielded item scene manager";
 127                 return false;
 128         }
 129         if (m_wieldnode == NULL)
 130         {
 131                 error_message = L"Failed to create the wielded item scene node";
 132                 return false;
 133         }
 134         return true;
 135 }
 136
 137 // Returns the fractional part of x
 138 inline f32 my_modf(f32 x)
 139 {
 140         double dummy;
 141         return modf(x, &dummy);
 142 }
 143
 144 void Camera::step(f32 dtime)
 145 {
 146         if(m_view_bobbing_fall > 0)
 147         {
 148                 m_view_bobbing_fall -= 3 * dtime;
 149                 if(m_view_bobbing_fall <= 0)
 150                         m_view_bobbing_fall = -1; // Mark the effect as finished
 151         }
 152
 153         bool was_under_zero = m_wield_change_timer < 0;
 154         m_wield_change_timer = MYMIN(m_wield_change_timer + dtime, 0.125);
 155
 156         if (m_wield_change_timer >= 0 && was_under_zero)
 157                 m_wieldnode->setItem(m_wield_item_next, m_gamedef);
 158
 159         if (m_view_bobbing_state != 0)
 160         {
 161                 //f32 offset = dtime * m_view_bobbing_speed * 0.035;
 162                 f32 offset = dtime * m_view_bobbing_speed * 0.030;
 163                 if (m_view_bobbing_state == 2)
 164                 {
 165 #if 0
 166                         // Animation is getting turned off
 167                         if (m_view_bobbing_anim < 0.5)
 168                                 m_view_bobbing_anim -= offset;
 169                         else
 170                                 m_view_bobbing_anim += offset;
 171                         if (m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1)
 172                         {
 173                                 m_view_bobbing_anim = 0;
 174                                 m_view_bobbing_state = 0;
 175                         }
 176 #endif
 177 #if 1
 178                         // Animation is getting turned off
 179                         if(m_view_bobbing_anim < 0.25)
 180                         {
 181                                 m_view_bobbing_anim -= offset;
 182                         } else if(m_view_bobbing_anim > 0.75) {
 183                                 m_view_bobbing_anim += offset;
 184                         }
 185                         if(m_view_bobbing_anim < 0.5)
 186                         {
 187                                 m_view_bobbing_anim += offset;
 188                                 if(m_view_bobbing_anim > 0.5)
 189                                         m_view_bobbing_anim = 0.5;
 190                         } else {
 191                                 m_view_bobbing_anim -= offset;
 192                                 if(m_view_bobbing_anim < 0.5)
 193                                         m_view_bobbing_anim = 0.5;
 194                         }
 195                         if(m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1 ||
 196                                         fabs(m_view_bobbing_anim - 0.5) < 0.01)
 197                         {
 198                                 m_view_bobbing_anim = 0;
 199                                 m_view_bobbing_state = 0;
 200                         }
 201 #endif
 202                 }
 203                 else
 204                 {
 205                         float was = m_view_bobbing_anim;
 206                         m_view_bobbing_anim = my_modf(m_view_bobbing_anim + offset);
 207                         bool step = (was == 0 ||
 208                                         (was < 0.5f && m_view_bobbing_anim >= 0.5f) ||
 209                                         (was > 0.5f && m_view_bobbing_anim <= 0.5f));
 210                         if(step)
 211                         {
 212                                 MtEvent *e = new SimpleTriggerEvent("ViewBobbingStep");
 213                                 m_gamedef->event()->put(e);
 214                         }
 215                 }
 216         }
 217
 218         if (m_digging_button != -1)
 219         {
 220                 f32 offset = dtime * 3.5;
 221                 float m_digging_anim_was = m_digging_anim;
 222                 m_digging_anim += offset;
 223                 if (m_digging_anim >= 1)
 224                 {
 225                         m_digging_anim = 0;
 226                         m_digging_button = -1;
 227                 }
 228                 float lim = 0.15;
 229                 if(m_digging_anim_was < lim && m_digging_anim >= lim)
 230                 {
 231                         if(m_digging_button == 0)
 232                         {
 233                                 MtEvent *e = new SimpleTriggerEvent("CameraPunchLeft");
 234                                 m_gamedef->event()->put(e);
 235                         } else if(m_digging_button == 1) {
 236                                 MtEvent *e = new SimpleTriggerEvent("CameraPunchRight");
 237                                 m_gamedef->event()->put(e);
 238                         }
 239                 }
 240         }
 241 }
 242
 243 void Camera::update(LocalPlayer* player, f32 frametime, f32 busytime,
 244                 f32 tool_reload_ratio, ClientEnvironment &c_env)
 245 {
 246         // Get player position
 247         // Smooth the movement when walking up stairs
 248         v3f old_player_position = m_playernode->getPosition();
 249         v3f player_position = player->getPosition();
 250         if (player->isAttached && player->parent)
 251                 player_position = player->parent->getPosition();
 252         //if(player->touching_ground && player_position.Y > old_player_position.Y)
 253         if(player->touching_ground &&
 254                         player_position.Y > old_player_position.Y)
 255         {
 256                 f32 oldy = old_player_position.Y;
 257                 f32 newy = player_position.Y;
 258                 f32 t = exp(-23*frametime);
 259                 player_position.Y = oldy * t + newy * (1-t);
 260         }
 261
 262         // Set player node transformation
 263         m_playernode->setPosition(player_position);
 264         m_playernode->setRotation(v3f(0, -1 * player->getYaw(), 0));
 265         m_playernode->updateAbsolutePosition();
 266
 267         // Get camera tilt timer (hurt animation)
 268         float cameratilt = fabs(fabs(player->hurt_tilt_timer-0.75)-0.75);
 269
 270         // Fall bobbing animation
 271         float fall_bobbing = 0;
 272         if(player->camera_impact >= 1 && m_camera_mode < CAMERA_MODE_THIRD)
 273         {
 274                 if(m_view_bobbing_fall == -1) // Effect took place and has finished
 275                         player->camera_impact = m_view_bobbing_fall = 0;
 276                 else if(m_view_bobbing_fall == 0) // Initialize effect
 277                         m_view_bobbing_fall = 1;
 278
 279                 // Convert 0 -> 1 to 0 -> 1 -> 0
 280                 fall_bobbing = m_view_bobbing_fall < 0.5 ? m_view_bobbing_fall * 2 : -(m_view_bobbing_fall - 0.5) * 2 + 1;
 281                 // Smoothen and invert the above
 282                 fall_bobbing = sin(fall_bobbing * 0.5 * M_PI) * -1;
 283                 // Amplify according to the intensity of the impact
 284                 fall_bobbing *= (1 - rangelim(50 / player->camera_impact, 0, 1)) * 5;
 285
 286                 fall_bobbing *= g_settings->getFloat("fall_bobbing_amount");
 287         }
 288
 289         // Calculate players eye offset for different camera modes
 290         v3f PlayerEyeOffset = player->getEyeOffset();
 291         if (m_camera_mode == CAMERA_MODE_FIRST)
 292                 PlayerEyeOffset += player->eye_offset_first;
 293         else
 294                 PlayerEyeOffset += player->eye_offset_third;
 295
 296         // Set head node transformation
 297         m_headnode->setPosition(PlayerEyeOffset+v3f(0,cameratilt*-player->hurt_tilt_strength+fall_bobbing,0));
 298         m_headnode->setRotation(v3f(player->getPitch(), 0, cameratilt*player->hurt_tilt_strength));
 299         m_headnode->updateAbsolutePosition();
 300
 301         // Compute relative camera position and target
 302         v3f rel_cam_pos = v3f(0,0,0);
 303         v3f rel_cam_target = v3f(0,0,1);
 304         v3f rel_cam_up = v3f(0,1,0);
 305
 306         if (m_view_bobbing_anim != 0 && m_camera_mode < CAMERA_MODE_THIRD)
 307         {
 308                 f32 bobfrac = my_modf(m_view_bobbing_anim * 2);
 309                 f32 bobdir = (m_view_bobbing_anim < 0.5) ? 1.0 : -1.0;
 310
 311                 #if 1
 312                 f32 bobknob = 1.2;
 313                 f32 bobtmp = sin(pow(bobfrac, bobknob) * M_PI);
 314                 //f32 bobtmp2 = cos(pow(bobfrac, bobknob) * M_PI);
 315
 316                 v3f bobvec = v3f(
 317                         0.3 * bobdir * sin(bobfrac * M_PI),
 318                         -0.28 * bobtmp * bobtmp,
 319                         0.);
 320
 321                 //rel_cam_pos += 0.2 * bobvec;
 322                 //rel_cam_target += 0.03 * bobvec;
 323                 //rel_cam_up.rotateXYBy(0.02 * bobdir * bobtmp * M_PI);
 324                 float f = 1.0;
 325                 f *= g_settings->getFloat("view_bobbing_amount");
 326                 rel_cam_pos += bobvec * f;
 327                 //rel_cam_target += 0.995 * bobvec * f;
 328                 rel_cam_target += bobvec * f;
 329                 rel_cam_target.Z -= 0.005 * bobvec.Z * f;
 330                 //rel_cam_target.X -= 0.005 * bobvec.X * f;
 331                 //rel_cam_target.Y -= 0.005 * bobvec.Y * f;
 332                 rel_cam_up.rotateXYBy(-0.03 * bobdir * bobtmp * M_PI * f);
 333                 #else
 334                 f32 angle_deg = 1 * bobdir * sin(bobfrac * M_PI);
 335                 f32 angle_rad = angle_deg * M_PI / 180;
 336                 f32 r = 0.05;
 337                 v3f off = v3f(
 338                         r * sin(angle_rad),
 339                         r * (cos(angle_rad) - 1),
 340                         0);
 341                 rel_cam_pos += off;
 342                 //rel_cam_target += off;
 343                 rel_cam_up.rotateXYBy(angle_deg);
 344                 #endif
 345
 346         }
 347
 348         // Compute absolute camera position and target
 349         m_headnode->getAbsoluteTransformation().transformVect(m_camera_position, rel_cam_pos);
 350         m_headnode->getAbsoluteTransformation().rotateVect(m_camera_direction, rel_cam_target - rel_cam_pos);
 351
 352         v3f abs_cam_up;
 353         m_headnode->getAbsoluteTransformation().rotateVect(abs_cam_up, rel_cam_up);
 354
 355         // Seperate camera position for calculation
 356         v3f my_cp = m_camera_position;
 357
 358         // Reposition the camera for third person view
 359         if (m_camera_mode > CAMERA_MODE_FIRST)
 360         {
 361                 if (m_camera_mode == CAMERA_MODE_THIRD_FRONT)
 362                         m_camera_direction *= -1;
 363
 364                 my_cp.Y += 2;
 365
 366                 // Calculate new position
 367                 bool abort = false;
 368                 for (int i = BS; i <= BS*2; i++)
 369                 {
 370                         my_cp.X = m_camera_position.X + m_camera_direction.X*-i;
 371                         my_cp.Z = m_camera_position.Z + m_camera_direction.Z*-i;
 372                         if (i > 12)
 373                                 my_cp.Y = m_camera_position.Y + (m_camera_direction.Y*-i);
 374
 375                         // Prevent camera positioned inside nodes
 376                         INodeDefManager *nodemgr = m_gamedef->ndef();
 377                         MapNode n = c_env.getClientMap().getNodeNoEx(floatToInt(my_cp, BS));
 378                         const ContentFeatures& features = nodemgr->get(n);
 379                         if(features.walkable)
 380                         {
 381                                 my_cp.X += m_camera_direction.X*-1*-BS/2;
 382                                 my_cp.Z += m_camera_direction.Z*-1*-BS/2;
 383                                 my_cp.Y += m_camera_direction.Y*-1*-BS/2;
 384                                 abort = true;
 385                                 break;
 386                         }
 387                 }
 388
 389                 // If node blocks camera position don't move y to heigh
 390                 if (abort && my_cp.Y > player_position.Y+BS*2)
 391                         my_cp.Y = player_position.Y+BS*2;
 392         }
 393
 394         // Update offset if too far away from the center of the map
 395         m_camera_offset.X += CAMERA_OFFSET_STEP*
 396                         (((s16)(my_cp.X/BS) - m_camera_offset.X)/CAMERA_OFFSET_STEP);
 397         m_camera_offset.Y += CAMERA_OFFSET_STEP*
 398                         (((s16)(my_cp.Y/BS) - m_camera_offset.Y)/CAMERA_OFFSET_STEP);
 399         m_camera_offset.Z += CAMERA_OFFSET_STEP*
 400                         (((s16)(my_cp.Z/BS) - m_camera_offset.Z)/CAMERA_OFFSET_STEP);
 401
 402         // Set camera node transformation
 403         m_cameranode->setPosition(my_cp-intToFloat(m_camera_offset, BS));
 404         m_cameranode->setUpVector(abs_cam_up);
 405         // *100.0 helps in large map coordinates
 406         m_cameranode->setTarget(my_cp-intToFloat(m_camera_offset, BS) + 100 * m_camera_direction);
 407
 408         // update the camera position in front-view mode to render blocks behind player
 409         if (m_camera_mode == CAMERA_MODE_THIRD_FRONT)
 410                 m_camera_position = my_cp;
 411
 412         // Get FOV setting
 413         f32 fov_degrees = g_settings->getFloat("fov");
 414         fov_degrees = MYMAX(fov_degrees, 10.0);
 415         fov_degrees = MYMIN(fov_degrees, 170.0);
 416
 417         // FOV and aspect ratio
 418         m_aspect = (f32) porting::getWindowSize().X / (f32) porting::getWindowSize().Y;
 419         m_fov_y = fov_degrees * M_PI / 180.0;
 420         // Increase vertical FOV on lower aspect ratios (<16:10)
 421         m_fov_y *= MYMAX(1.0, MYMIN(1.4, sqrt(16./10. / m_aspect)));
 422         m_fov_x = 2 * atan(m_aspect * tan(0.5 * m_fov_y));
 423         m_cameranode->setAspectRatio(m_aspect);
 424         m_cameranode->setFOV(m_fov_y);
 425
 426         // Position the wielded item
 427         //v3f wield_position = v3f(45, -35, 65);
 428         v3f wield_position = v3f(55, -35, 65);
 429         //v3f wield_rotation = v3f(-100, 120, -100);
 430         v3f wield_rotation = v3f(-100, 120, -100);
 431         wield_position.Y += fabs(m_wield_change_timer)*320 - 40;
 432         if(m_digging_anim < 0.05 || m_digging_anim > 0.5)
 433         {
 434                 f32 frac = 1.0;
 435                 if(m_digging_anim > 0.5)
 436                         frac = 2.0 * (m_digging_anim - 0.5);
 437                 // This value starts from 1 and settles to 0
 438                 f32 ratiothing = pow((1.0f - tool_reload_ratio), 0.5f);
 439                 //f32 ratiothing2 = pow(ratiothing, 0.5f);
 440                 f32 ratiothing2 = (easeCurve(ratiothing*0.5))*2.0;
 441                 wield_position.Y -= frac * 25.0 * pow(ratiothing2, 1.7f);
 442                 //wield_position.Z += frac * 5.0 * ratiothing2;
 443                 wield_position.X -= frac * 35.0 * pow(ratiothing2, 1.1f);
 444                 wield_rotation.Y += frac * 70.0 * pow(ratiothing2, 1.4f);
 445                 //wield_rotation.X -= frac * 15.0 * pow(ratiothing2, 1.4f);
 446                 //wield_rotation.Z += frac * 15.0 * pow(ratiothing2, 1.0f);
 447         }
 448         if (m_digging_button != -1)
 449         {
 450                 f32 digfrac = m_digging_anim;
 451                 wield_position.X -= 50 * sin(pow(digfrac, 0.8f) * M_PI);
 452                 wield_position.Y += 24 * sin(digfrac * 1.8 * M_PI);
 453                 wield_position.Z += 25 * 0.5;
 454
 455                 // Euler angles are PURE EVIL, so why not use quaternions?
 456                 core::quaternion quat_begin(wield_rotation * core::DEGTORAD);
 457                 core::quaternion quat_end(v3f(80, 30, 100) * core::DEGTORAD);
 458                 core::quaternion quat_slerp;
 459                 quat_slerp.slerp(quat_begin, quat_end, sin(digfrac * M_PI));
 460                 quat_slerp.toEuler(wield_rotation);
 461                 wield_rotation *= core::RADTODEG;
 462         } else {
 463                 f32 bobfrac = my_modf(m_view_bobbing_anim);
 464                 wield_position.X -= sin(bobfrac*M_PI*2.0) * 3.0;
 465                 wield_position.Y += sin(my_modf(bobfrac*2.0)*M_PI) * 3.0;
 466         }
 467         m_wieldnode->setPosition(wield_position);
 468         m_wieldnode->setRotation(wield_rotation);
 469
 470         // Shine light upon the wield mesh
 471         video::SColor black(255,0,0,0);
 472         m_wieldmgr->setAmbientLight(player->light_color.getInterpolated(black, 0.7));
 473         m_wieldlightnode->getLightData().DiffuseColor = player->light_color.getInterpolated(black, 0.3);
 474         m_wieldlightnode->setPosition(v3f(30+5*sin(2*player->getYaw()*M_PI/180), -50, 0));
 475
 476         // Render distance feedback loop
 477         updateViewingRange(frametime, busytime);
 478
 479         // If the player seems to be walking on solid ground,
 480         // view bobbing is enabled and free_move is off,
 481         // start (or continue) the view bobbing animation.
 482         v3f speed = player->getSpeed();
 483         if ((hypot(speed.X, speed.Z) > BS) &&
 484                 (player->touching_ground) &&
 485                 (g_settings->getBool("view_bobbing") == true) &&
 486                 (g_settings->getBool("free_move") == false ||
 487                                 !m_gamedef->checkLocalPrivilege("fly")))
 488         {
 489                 // Start animation
 490                 m_view_bobbing_state = 1;
 491                 m_view_bobbing_speed = MYMIN(speed.getLength(), 40);
 492         }
 493         else if (m_view_bobbing_state == 1)
 494         {
 495                 // Stop animation
 496                 m_view_bobbing_state = 2;
 497                 m_view_bobbing_speed = 60;
 498         }
 499 }
 500
 501 void Camera::updateViewingRange(f32 frametime_in, f32 busytime_in)
 502 {
 503         if (m_draw_control.range_all)
 504                 return;
 505
 506         m_added_busytime += busytime_in;
 507         m_added_frames += 1;
 508
 509         m_frametime_counter -= frametime_in;
 510         if (m_frametime_counter > 0)
 511                 return;
 512         m_frametime_counter = 0.2; // Same as ClientMap::updateDrawList interval
 513
 514         /*dstream<<__FUNCTION_NAME
 515                         <<": Collected "<<m_added_frames<<" frames, total of "
 516                         <<m_added_busytime<<"s."<<std::endl;
 517
 518         dstream<<"m_draw_control.blocks_drawn="
 519                         <<m_draw_control.blocks_drawn
 520                         <<", m_draw_control.blocks_would_have_drawn="
 521                         <<m_draw_control.blocks_would_have_drawn
 522                         <<std::endl;*/
 523
 524         // Get current viewing range and FPS settings
 525         f32 viewing_range_min = g_settings->getS16("viewing_range_nodes_min");
 526         viewing_range_min = MYMAX(15.0, viewing_range_min);
 527
 528         f32 viewing_range_max = g_settings->getS16("viewing_range_nodes_max");
 529         viewing_range_max = MYMAX(viewing_range_min, viewing_range_max);
 530
 531         // Immediately apply hard limits
 532         if(m_draw_control.wanted_range < viewing_range_min)
 533                 m_draw_control.wanted_range = viewing_range_min;
 534         if(m_draw_control.wanted_range > viewing_range_max)
 535                 m_draw_control.wanted_range = viewing_range_max;
 536
 537         // Just so big a value that everything rendered is visible
 538         // Some more allowance than viewing_range_max * BS because of clouds,
 539         // active objects, etc.
 540         if(viewing_range_max < 200*BS)
 541                 m_cameranode->setFarValue(200 * BS * 10);
 542         else
 543                 m_cameranode->setFarValue(viewing_range_max * BS * 10);
 544
 545         f32 wanted_fps = g_settings->getFloat("wanted_fps");
 546         wanted_fps = MYMAX(wanted_fps, 1.0);
 547         f32 wanted_frametime = 1.0 / wanted_fps;
 548
 549         m_draw_control.wanted_min_range = viewing_range_min;
 550         m_draw_control.wanted_max_blocks = (2.0*m_draw_control.blocks_would_have_drawn)+1;
 551         if (m_draw_control.wanted_max_blocks < 10)
 552                 m_draw_control.wanted_max_blocks = 10;
 553
 554         f32 block_draw_ratio = 1.0;
 555         if (m_draw_control.blocks_would_have_drawn != 0)
 556         {
 557                 block_draw_ratio = (f32)m_draw_control.blocks_drawn
 558                         / (f32)m_draw_control.blocks_would_have_drawn;
 559         }
 560
 561         // Calculate the average frametime in the case that all wanted
 562         // blocks had been drawn
 563         f32 frametime = m_added_busytime / m_added_frames / block_draw_ratio;
 564
 565         m_added_busytime = 0.0;
 566         m_added_frames = 0;
 567
 568         f32 wanted_frametime_change = wanted_frametime - frametime;
 569         //dstream<<"wanted_frametime_change="<<wanted_frametime_change<<std::endl;
 570         g_profiler->avg("wanted_frametime_change", wanted_frametime_change);
 571
 572         // If needed frametime change is small, just return
 573         // This value was 0.4 for many months until 2011-10-18 by c55;
 574         if (fabs(wanted_frametime_change) < wanted_frametime*0.33)
 575         {
 576                 //dstream<<"ignoring small wanted_frametime_change"<<std::endl;
 577                 return;
 578         }
 579
 580         f32 range = m_draw_control.wanted_range;
 581         f32 new_range = range;
 582
 583         f32 d_range = range - m_range_old;
 584         f32 d_busytime = busytime_in - m_busytime_old;
 585         if (d_range != 0)
 586         {
 587                 m_time_per_range = d_busytime / d_range;
 588         }
 589         //dstream<<"time_per_range="<<m_time_per_range<<std::endl;
 590         g_profiler->avg("time_per_range", m_time_per_range);
 591
 592         // The minimum allowed calculated frametime-range derivative:
 593         // Practically this sets the maximum speed of changing the range.
 594         // The lower this value, the higher the maximum changing speed.
 595         // A low value here results in wobbly range (0.001)
 596         // A low value can cause oscillation in very nonlinear time/range curves.
 597         // A high value here results in slow changing range (0.0025)
 598         // SUGG: This could be dynamically adjusted so that when
 599         //       the camera is turning, this is lower
 600         //f32 min_time_per_range = 0.0010; // Up to 0.4.7
 601         f32 min_time_per_range = 0.0005;
 602         if(m_time_per_range < min_time_per_range)
 603         {
 604                 m_time_per_range = min_time_per_range;
 605                 //dstream<<"m_time_per_range="<<m_time_per_range<<" (min)"<<std::endl;
 606         }
 607         else
 608         {
 609                 //dstream<<"m_time_per_range="<<m_time_per_range<<std::endl;
 610         }
 611
 612         f32 wanted_range_change = wanted_frametime_change / m_time_per_range;
 613         // Dampen the change a bit to kill oscillations
 614         //wanted_range_change *= 0.9;
 615         //wanted_range_change *= 0.75;
 616         wanted_range_change *= 0.5;
 617         //dstream<<"wanted_range_change="<<wanted_range_change<<std::endl;
 618
 619         // If needed range change is very small, just return
 620         if(fabs(wanted_range_change) < 0.001)
 621         {
 622                 //dstream<<"ignoring small wanted_range_change"<<std::endl;
 623                 return;
 624         }
 625
 626         new_range += wanted_range_change;
 627
 628         //f32 new_range_unclamped = new_range;
 629         new_range = MYMAX(new_range, viewing_range_min);
 630         new_range = MYMIN(new_range, viewing_range_max);
 631         /*dstream<<"new_range="<<new_range_unclamped
 632                         <<", clamped to "<<new_range<<std::endl;*/
 633
 634         m_range_old = m_draw_control.wanted_range;
 635         m_busytime_old = busytime_in;
 636
 637         m_draw_control.wanted_range = new_range;
 638 }
 639
 640 void Camera::setDigging(s32 button)
 641 {
 642         if (m_digging_button == -1)
 643                 m_digging_button = button;
 644 }
 645
 646 void Camera::wield(const ItemStack &item)
 647 {
 648         if (item.name != m_wield_item_next.name) {
 649                 m_wield_item_next = item;
 650                 if (m_wield_change_timer > 0)
 651                         m_wield_change_timer = -m_wield_change_timer;
 652                 else if (m_wield_change_timer == 0)
 653                         m_wield_change_timer = -0.001;
 654         }
 655 }
 656
 657 void Camera::drawWieldedTool(irr::core::matrix4* translation)
 658 {
 659         // Clear Z buffer so that the wielded tool stay in front of world geometry
 660         m_wieldmgr->getVideoDriver()->clearZBuffer();
 661
 662         // Draw the wielded node (in a separate scene manager)
 663         scene::ICameraSceneNode* cam = m_wieldmgr->getActiveCamera();
 664         cam->setAspectRatio(m_cameranode->getAspectRatio());
 665         cam->setFOV(72.0*M_PI/180.0);
 666         cam->setNearValue(0.1);
 667         cam->setFarValue(1000);
 668         if (translation != NULL)
 669         {
 670                 irr::core::matrix4 startMatrix = cam->getAbsoluteTransformation();
 671                 irr::core::vector3df focusPoint = (cam->getTarget()
 672                                 - cam->getAbsolutePosition()).setLength(1)
 673                                 + cam->getAbsolutePosition();
 674
 675                 irr::core::vector3df camera_pos =
 676                                 (startMatrix * *translation).getTranslation();
 677                 cam->setPosition(camera_pos);
 678                 cam->setTarget(focusPoint);
 679         }
 680         m_wieldmgr->drawAll();
 681 }