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         //dstream<<__FUNCTION_NAME<<std::endl;
  88
  89         // note: making the camera node a child of the player node
  90         // would lead to unexpected behaviour, so we don't do that.
  91         m_playernode = smgr->addEmptySceneNode(smgr->getRootSceneNode());
  92         m_headnode = smgr->addEmptySceneNode(m_playernode);
  93         m_cameranode = smgr->addCameraSceneNode(smgr->getRootSceneNode());
  94         m_cameranode->bindTargetAndRotation(true);
  95
  96         // This needs to be in its own scene manager. It is drawn after
  97         // all other 3D scene nodes and before the GUI.
  98         m_wieldmgr = smgr->createNewSceneManager();
  99         m_wieldmgr->addCameraSceneNode();
 100         m_wieldnode = m_wieldmgr->addMeshSceneNode(m_dummymesh, NULL);  // need a dummy mesh
 101 }
 102
 103 Camera::~Camera()
 104 {
 105         m_wieldmgr->drop();
 106
 107         delete m_dummymesh;
 108 }
 109
 110 bool Camera::successfullyCreated(std::wstring& error_message)
 111 {
 112         if (m_playernode == NULL)
 113         {
 114                 error_message = L"Failed to create the player scene node";
 115                 return false;
 116         }
 117         if (m_headnode == NULL)
 118         {
 119                 error_message = L"Failed to create the head scene node";
 120                 return false;
 121         }
 122         if (m_cameranode == NULL)
 123         {
 124                 error_message = L"Failed to create the camera scene node";
 125                 return false;
 126         }
 127         if (m_wieldmgr == NULL)
 128         {
 129                 error_message = L"Failed to create the wielded item scene manager";
 130                 return false;
 131         }
 132         if (m_wieldnode == NULL)
 133         {
 134                 error_message = L"Failed to create the wielded item scene node";
 135                 return false;
 136         }
 137         return true;
 138 }
 139
 140 // Returns the fractional part of x
 141 inline f32 my_modf(f32 x)
 142 {
 143         double dummy;
 144         return modf(x, &dummy);
 145 }
 146
 147 void Camera::step(f32 dtime)
 148 {
 149         if(m_view_bobbing_fall > 0)
 150         {
 151                 m_view_bobbing_fall -= 3 * dtime;
 152                 if(m_view_bobbing_fall <= 0)
 153                         m_view_bobbing_fall = -1; // Mark the effect as finished
 154         }
 155
 156         bool was_under_zero = m_wield_change_timer < 0;
 157         if(m_wield_change_timer < 0.125)
 158                 m_wield_change_timer += dtime;
 159         if(m_wield_change_timer > 0.125)
 160                 m_wield_change_timer = 0.125;
 161
 162         if(m_wield_change_timer >= 0 && was_under_zero) {
 163                 if(m_wield_mesh_next) {
 164                         m_wieldnode->setMesh(m_wield_mesh_next);
 165                         m_wieldnode->setVisible(true);
 166                 } else {
 167                         m_wieldnode->setVisible(false);
 168                 }
 169                 m_wield_mesh_next = NULL;
 170         }
 171
 172         if (m_view_bobbing_state != 0)
 173         {
 174                 //f32 offset = dtime * m_view_bobbing_speed * 0.035;
 175                 f32 offset = dtime * m_view_bobbing_speed * 0.030;
 176                 if (m_view_bobbing_state == 2)
 177                 {
 178 #if 0
 179                         // Animation is getting turned off
 180                         if (m_view_bobbing_anim < 0.5)
 181                                 m_view_bobbing_anim -= offset;
 182                         else
 183                                 m_view_bobbing_anim += offset;
 184                         if (m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1)
 185                         {
 186                                 m_view_bobbing_anim = 0;
 187                                 m_view_bobbing_state = 0;
 188                         }
 189 #endif
 190 #if 1
 191                         // Animation is getting turned off
 192                         if(m_view_bobbing_anim < 0.25){
 193                                 m_view_bobbing_anim -= offset;
 194                         } else if(m_view_bobbing_anim > 0.75){
 195                                 m_view_bobbing_anim += offset;
 196                         } if(m_view_bobbing_anim < 0.5){
 197                                 m_view_bobbing_anim += offset;
 198                                 if(m_view_bobbing_anim > 0.5)
 199                                         m_view_bobbing_anim = 0.5;
 200                         } else {
 201                                 m_view_bobbing_anim -= offset;
 202                                 if(m_view_bobbing_anim < 0.5)
 203                                         m_view_bobbing_anim = 0.5;
 204                         }
 205                         if(m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1 ||
 206                                         fabs(m_view_bobbing_anim - 0.5) < 0.01)
 207                         {
 208                                 m_view_bobbing_anim = 0;
 209                                 m_view_bobbing_state = 0;
 210                         }
 211 #endif
 212                 }
 213                 else
 214                 {
 215                         float was = m_view_bobbing_anim;
 216                         m_view_bobbing_anim = my_modf(m_view_bobbing_anim + offset);
 217                         bool step = (was == 0 ||
 218                                         (was < 0.5f && m_view_bobbing_anim >= 0.5f) ||
 219                                         (was > 0.5f && m_view_bobbing_anim <= 0.5f));
 220                         if(step){
 221                                 MtEvent *e = new SimpleTriggerEvent("ViewBobbingStep");
 222                                 m_gamedef->event()->put(e);
 223                         }
 224                 }
 225         }
 226
 227         if (m_digging_button != -1)
 228         {
 229                 f32 offset = dtime * 3.5;
 230                 float m_digging_anim_was = m_digging_anim;
 231                 m_digging_anim += offset;
 232                 if (m_digging_anim >= 1)
 233                 {
 234                         m_digging_anim = 0;
 235                         m_digging_button = -1;
 236                 }
 237                 float lim = 0.15;
 238                 if(m_digging_anim_was < lim && m_digging_anim >= lim)
 239                 {
 240                         if(m_digging_button == 0){
 241                                 MtEvent *e = new SimpleTriggerEvent("CameraPunchLeft");
 242                                 m_gamedef->event()->put(e);
 243                         } else if(m_digging_button == 1){
 244                                 MtEvent *e = new SimpleTriggerEvent("CameraPunchRight");
 245                                 m_gamedef->event()->put(e);
 246                         }
 247                 }
 248         }
 249 }
 250
 251 void Camera::update(LocalPlayer* player, f32 frametime, f32 busytime,
 252                 v2u32 screensize, f32 tool_reload_ratio,
 253                 int current_camera_mode, ClientEnvironment &c_env)
 254 {
 255         // Get player position
 256         // Smooth the movement when walking up stairs
 257         v3f old_player_position = m_playernode->getPosition();
 258         v3f player_position = player->getPosition();
 259         if (player->isAttached && player->parent)
 260                 player_position = player->parent->getPosition();
 261         //if(player->touching_ground && player_position.Y > old_player_position.Y)
 262         if(player->touching_ground &&
 263                         player_position.Y > old_player_position.Y)
 264         {
 265                 f32 oldy = old_player_position.Y;
 266                 f32 newy = player_position.Y;
 267                 f32 t = exp(-23*frametime);
 268                 player_position.Y = oldy * t + newy * (1-t);
 269         }
 270
 271         // Set player node transformation
 272         m_playernode->setPosition(player_position);
 273         m_playernode->setRotation(v3f(0, -1 * player->getYaw(), 0));
 274         m_playernode->updateAbsolutePosition();
 275
 276         // Get camera tilt timer (hurt animation)
 277         float cameratilt = fabs(fabs(player->hurt_tilt_timer-0.75)-0.75);
 278
 279         // Fall bobbing animation
 280         float fall_bobbing = 0;
 281         if(player->camera_impact >= 1 && current_camera_mode < CAMERA_MODE_THIRD)
 282         {
 283                 if(m_view_bobbing_fall == -1) // Effect took place and has finished
 284                         player->camera_impact = m_view_bobbing_fall = 0;
 285                 else if(m_view_bobbing_fall == 0) // Initialize effect
 286                         m_view_bobbing_fall = 1;
 287
 288                 // Convert 0 -> 1 to 0 -> 1 -> 0
 289                 fall_bobbing = m_view_bobbing_fall < 0.5 ? m_view_bobbing_fall * 2 : -(m_view_bobbing_fall - 0.5) * 2 + 1;
 290                 // Smoothen and invert the above
 291                 fall_bobbing = sin(fall_bobbing * 0.5 * M_PI) * -1;
 292                 // Amplify according to the intensity of the impact
 293                 fall_bobbing *= (1 - rangelim(50 / player->camera_impact, 0, 1)) * 5;
 294
 295                 fall_bobbing *= g_settings->getFloat("fall_bobbing_amount");
 296         }
 297
 298         // Calculate players eye offset for different camera modes
 299         v3f PlayerEyeOffset = player->getEyeOffset();
 300         if (current_camera_mode == CAMERA_MODE_FIRST)
 301                 PlayerEyeOffset += player->eye_offset_first;
 302         else
 303                 PlayerEyeOffset += player->eye_offset_third;
 304
 305         // Set head node transformation
 306         m_headnode->setPosition(PlayerEyeOffset+v3f(0,cameratilt*-player->hurt_tilt_strength+fall_bobbing,0));
 307         m_headnode->setRotation(v3f(player->getPitch(), 0, cameratilt*player->hurt_tilt_strength));
 308         m_headnode->updateAbsolutePosition();
 309
 310         // Compute relative camera position and target
 311         v3f rel_cam_pos = v3f(0,0,0);
 312         v3f rel_cam_target = v3f(0,0,1);
 313         v3f rel_cam_up = v3f(0,1,0);
 314
 315         if (m_view_bobbing_anim != 0 && current_camera_mode < CAMERA_MODE_THIRD)
 316         {
 317                 f32 bobfrac = my_modf(m_view_bobbing_anim * 2);
 318                 f32 bobdir = (m_view_bobbing_anim < 0.5) ? 1.0 : -1.0;
 319
 320                 #if 1
 321                 f32 bobknob = 1.2;
 322                 f32 bobtmp = sin(pow(bobfrac, bobknob) * M_PI);
 323                 //f32 bobtmp2 = cos(pow(bobfrac, bobknob) * M_PI);
 324
 325                 v3f bobvec = v3f(
 326                         0.3 * bobdir * sin(bobfrac * M_PI),
 327                         -0.28 * bobtmp * bobtmp,
 328                         0.);
 329
 330                 //rel_cam_pos += 0.2 * bobvec;
 331                 //rel_cam_target += 0.03 * bobvec;
 332                 //rel_cam_up.rotateXYBy(0.02 * bobdir * bobtmp * M_PI);
 333                 float f = 1.0;
 334                 f *= g_settings->getFloat("view_bobbing_amount");
 335                 rel_cam_pos += bobvec * f;
 336                 //rel_cam_target += 0.995 * bobvec * f;
 337                 rel_cam_target += bobvec * f;
 338                 rel_cam_target.Z -= 0.005 * bobvec.Z * f;
 339                 //rel_cam_target.X -= 0.005 * bobvec.X * f;
 340                 //rel_cam_target.Y -= 0.005 * bobvec.Y * f;
 341                 rel_cam_up.rotateXYBy(-0.03 * bobdir * bobtmp * M_PI * f);
 342                 #else
 343                 f32 angle_deg = 1 * bobdir * sin(bobfrac * M_PI);
 344                 f32 angle_rad = angle_deg * M_PI / 180;
 345                 f32 r = 0.05;
 346                 v3f off = v3f(
 347                         r * sin(angle_rad),
 348                         r * (cos(angle_rad) - 1),
 349                         0);
 350                 rel_cam_pos += off;
 351                 //rel_cam_target += off;
 352                 rel_cam_up.rotateXYBy(angle_deg);
 353                 #endif
 354
 355         }
 356
 357         // Compute absolute camera position and target
 358         m_headnode->getAbsoluteTransformation().transformVect(m_camera_position, rel_cam_pos);
 359         m_headnode->getAbsoluteTransformation().rotateVect(m_camera_direction, rel_cam_target - rel_cam_pos);
 360
 361         v3f abs_cam_up;
 362         m_headnode->getAbsoluteTransformation().rotateVect(abs_cam_up, rel_cam_up);
 363
 364         // Seperate camera position for calculation
 365         v3f my_cp = m_camera_position;
 366
 367         // Reposition the camera for third person view
 368         if (current_camera_mode > CAMERA_MODE_FIRST) {
 369
 370                 if (current_camera_mode == CAMERA_MODE_THIRD_FRONT)
 371                         m_camera_direction *= -1;
 372
 373                 my_cp.Y += 2;
 374
 375                 // Calculate new position
 376                 bool abort = false;
 377                 for (int i = BS; i <= BS*2; i++) {
 378                         my_cp.X = m_camera_position.X + m_camera_direction.X*-i;
 379                         my_cp.Z = m_camera_position.Z + m_camera_direction.Z*-i;
 380                         if (i > 12)
 381                                 my_cp.Y = m_camera_position.Y + (m_camera_direction.Y*-i);
 382
 383                         // Prevent camera positioned inside nodes
 384                         INodeDefManager *nodemgr = m_gamedef->ndef();
 385                         MapNode n = c_env.getClientMap().getNodeNoEx(floatToInt(my_cp, BS));
 386                         const ContentFeatures& features = nodemgr->get(n);
 387                         if(features.walkable) {
 388                                 my_cp.X += m_camera_direction.X*-1*-BS/2;
 389                                 my_cp.Z += m_camera_direction.Z*-1*-BS/2;
 390                                 my_cp.Y += m_camera_direction.Y*-1*-BS/2;
 391                                 abort = true;
 392                                 break;
 393                         }
 394                 }
 395
 396                 // If node blocks camera position don't move y to heigh
 397                 if (abort && my_cp.Y > player_position.Y+BS*2)
 398                         my_cp.Y = player_position.Y+BS*2;
 399         }
 400
 401         // Update offset if too far away from the center of the map
 402         m_camera_offset.X += CAMERA_OFFSET_STEP*
 403                         (((s16)(my_cp.X/BS) - m_camera_offset.X)/CAMERA_OFFSET_STEP);
 404         m_camera_offset.Y += CAMERA_OFFSET_STEP*
 405                         (((s16)(my_cp.Y/BS) - m_camera_offset.Y)/CAMERA_OFFSET_STEP);
 406         m_camera_offset.Z += CAMERA_OFFSET_STEP*
 407                         (((s16)(my_cp.Z/BS) - m_camera_offset.Z)/CAMERA_OFFSET_STEP);
 408
 409         // Set camera node transformation
 410         m_cameranode->setPosition(my_cp-intToFloat(m_camera_offset, BS));
 411         m_cameranode->setUpVector(abs_cam_up);
 412         // *100.0 helps in large map coordinates
 413         m_cameranode->setTarget(my_cp-intToFloat(m_camera_offset, BS) + 100 * m_camera_direction);
 414
 415         // update the camera position in front-view mode to render blocks behind player
 416         if (current_camera_mode == CAMERA_MODE_THIRD_FRONT)
 417                 m_camera_position = my_cp;
 418
 419         // Get FOV setting
 420         f32 fov_degrees = g_settings->getFloat("fov");
 421         fov_degrees = MYMAX(fov_degrees, 10.0);
 422         fov_degrees = MYMIN(fov_degrees, 170.0);
 423
 424         // FOV and aspect ratio
 425         m_aspect = (f32)screensize.X / (f32) screensize.Y;
 426         m_fov_y = fov_degrees * M_PI / 180.0;
 427         // Increase vertical FOV on lower aspect ratios (<16:10)
 428         m_fov_y *= MYMAX(1.0, MYMIN(1.4, sqrt(16./10. / m_aspect)));
 429         m_fov_x = 2 * atan(m_aspect * tan(0.5 * m_fov_y));
 430         m_cameranode->setAspectRatio(m_aspect);
 431         m_cameranode->setFOV(m_fov_y);
 432
 433         // Position the wielded item
 434         //v3f wield_position = v3f(45, -35, 65);
 435         v3f wield_position = v3f(55, -35, 65);
 436         //v3f wield_rotation = v3f(-100, 120, -100);
 437         v3f wield_rotation = v3f(-100, 120, -100);
 438         if(m_wield_change_timer < 0)
 439                 wield_position.Y -= 40 + m_wield_change_timer*320;
 440         else
 441                 wield_position.Y -= 40 - m_wield_change_timer*320;
 442         if(m_digging_anim < 0.05 || m_digging_anim > 0.5){
 443                 f32 frac = 1.0;
 444                 if(m_digging_anim > 0.5)
 445                         frac = 2.0 * (m_digging_anim - 0.5);
 446                 // This value starts from 1 and settles to 0
 447                 f32 ratiothing = pow((1.0f - tool_reload_ratio), 0.5f);
 448                 //f32 ratiothing2 = pow(ratiothing, 0.5f);
 449                 f32 ratiothing2 = (easeCurve(ratiothing*0.5))*2.0;
 450                 wield_position.Y -= frac * 25.0 * pow(ratiothing2, 1.7f);
 451                 //wield_position.Z += frac * 5.0 * ratiothing2;
 452                 wield_position.X -= frac * 35.0 * pow(ratiothing2, 1.1f);
 453                 wield_rotation.Y += frac * 70.0 * pow(ratiothing2, 1.4f);
 454                 //wield_rotation.X -= frac * 15.0 * pow(ratiothing2, 1.4f);
 455                 //wield_rotation.Z += frac * 15.0 * pow(ratiothing2, 1.0f);
 456         }
 457         if (m_digging_button != -1)
 458         {
 459                 f32 digfrac = m_digging_anim;
 460                 wield_position.X -= 50 * sin(pow(digfrac, 0.8f) * M_PI);
 461                 wield_position.Y += 24 * sin(digfrac * 1.8 * M_PI);
 462                 wield_position.Z += 25 * 0.5;
 463
 464                 // Euler angles are PURE EVIL, so why not use quaternions?
 465                 core::quaternion quat_begin(wield_rotation * core::DEGTORAD);
 466                 core::quaternion quat_end(v3f(80, 30, 100) * core::DEGTORAD);
 467                 core::quaternion quat_slerp;
 468                 quat_slerp.slerp(quat_begin, quat_end, sin(digfrac * M_PI));
 469                 quat_slerp.toEuler(wield_rotation);
 470                 wield_rotation *= core::RADTODEG;
 471         }
 472         else {
 473                 f32 bobfrac = my_modf(m_view_bobbing_anim);
 474                 wield_position.X -= sin(bobfrac*M_PI*2.0) * 3.0;
 475                 wield_position.Y += sin(my_modf(bobfrac*2.0)*M_PI) * 3.0;
 476         }
 477         m_wieldnode->setPosition(wield_position);
 478         m_wieldnode->setRotation(wield_rotation);
 479         m_wieldlight = player->light;
 480
 481         // Render distance feedback loop
 482         updateViewingRange(frametime, busytime);
 483
 484         // If the player seems to be walking on solid ground,
 485         // view bobbing is enabled and free_move is off,
 486         // start (or continue) the view bobbing animation.
 487         v3f speed = player->getSpeed();
 488         if ((hypot(speed.X, speed.Z) > BS) &&
 489                 (player->touching_ground) &&
 490                 (g_settings->getBool("view_bobbing") == true) &&
 491                 (g_settings->getBool("free_move") == false ||
 492                                 !m_gamedef->checkLocalPrivilege("fly")))
 493         {
 494                 // Start animation
 495                 m_view_bobbing_state = 1;
 496                 m_view_bobbing_speed = MYMIN(speed.getLength(), 40);
 497         }
 498         else if (m_view_bobbing_state == 1)
 499         {
 500                 // Stop animation
 501                 m_view_bobbing_state = 2;
 502                 m_view_bobbing_speed = 60;
 503         }
 504 }
 505
 506 void Camera::updateViewingRange(f32 frametime_in, f32 busytime_in)
 507 {
 508         if (m_draw_control.range_all)
 509                 return;
 510
 511         m_added_busytime += busytime_in;
 512         m_added_frames += 1;
 513
 514         m_frametime_counter -= frametime_in;
 515         if (m_frametime_counter > 0)
 516                 return;
 517         m_frametime_counter = 0.2; // Same as ClientMap::updateDrawList interval
 518
 519         /*dstream<<__FUNCTION_NAME
 520                         <<": Collected "<<m_added_frames<<" frames, total of "
 521                         <<m_added_busytime<<"s."<<std::endl;
 522
 523         dstream<<"m_draw_control.blocks_drawn="
 524                         <<m_draw_control.blocks_drawn
 525                         <<", m_draw_control.blocks_would_have_drawn="
 526                         <<m_draw_control.blocks_would_have_drawn
 527                         <<std::endl;*/
 528
 529         // Get current viewing range and FPS settings
 530         f32 viewing_range_min = g_settings->getS16("viewing_range_nodes_min");
 531         viewing_range_min = MYMAX(15.0, viewing_range_min);
 532
 533         f32 viewing_range_max = g_settings->getS16("viewing_range_nodes_max");
 534         viewing_range_max = MYMAX(viewing_range_min, viewing_range_max);
 535
 536         // Immediately apply hard limits
 537         if(m_draw_control.wanted_range < viewing_range_min)
 538                 m_draw_control.wanted_range = viewing_range_min;
 539         if(m_draw_control.wanted_range > viewing_range_max)
 540                 m_draw_control.wanted_range = viewing_range_max;
 541
 542         // Just so big a value that everything rendered is visible
 543         // Some more allowance than viewing_range_max * BS because of clouds,
 544         // active objects, etc.
 545         if(viewing_range_max < 200*BS)
 546                 m_cameranode->setFarValue(200 * BS * 10);
 547         else
 548                 m_cameranode->setFarValue(viewing_range_max * BS * 10);
 549
 550         f32 wanted_fps = g_settings->getFloat("wanted_fps");
 551         wanted_fps = MYMAX(wanted_fps, 1.0);
 552         f32 wanted_frametime = 1.0 / wanted_fps;
 553
 554         m_draw_control.wanted_min_range = viewing_range_min;
 555         m_draw_control.wanted_max_blocks = (2.0*m_draw_control.blocks_would_have_drawn)+1;
 556         if (m_draw_control.wanted_max_blocks < 10)
 557                 m_draw_control.wanted_max_blocks = 10;
 558
 559         f32 block_draw_ratio = 1.0;
 560         if (m_draw_control.blocks_would_have_drawn != 0)
 561         {
 562                 block_draw_ratio = (f32)m_draw_control.blocks_drawn
 563                         / (f32)m_draw_control.blocks_would_have_drawn;
 564         }
 565
 566         // Calculate the average frametime in the case that all wanted
 567         // blocks had been drawn
 568         f32 frametime = m_added_busytime / m_added_frames / block_draw_ratio;
 569
 570         m_added_busytime = 0.0;
 571         m_added_frames = 0;
 572
 573         f32 wanted_frametime_change = wanted_frametime - frametime;
 574         //dstream<<"wanted_frametime_change="<<wanted_frametime_change<<std::endl;
 575         g_profiler->avg("wanted_frametime_change", wanted_frametime_change);
 576
 577         // If needed frametime change is small, just return
 578         // This value was 0.4 for many months until 2011-10-18 by c55;
 579         if (fabs(wanted_frametime_change) < wanted_frametime*0.33)
 580         {
 581                 //dstream<<"ignoring small wanted_frametime_change"<<std::endl;
 582                 return;
 583         }
 584
 585         f32 range = m_draw_control.wanted_range;
 586         f32 new_range = range;
 587
 588         f32 d_range = range - m_range_old;
 589         f32 d_busytime = busytime_in - m_busytime_old;
 590         if (d_range != 0)
 591         {
 592                 m_time_per_range = d_busytime / d_range;
 593         }
 594         //dstream<<"time_per_range="<<m_time_per_range<<std::endl;
 595         g_profiler->avg("time_per_range", m_time_per_range);
 596
 597         // The minimum allowed calculated frametime-range derivative:
 598         // Practically this sets the maximum speed of changing the range.
 599         // The lower this value, the higher the maximum changing speed.
 600         // A low value here results in wobbly range (0.001)
 601         // A low value can cause oscillation in very nonlinear time/range curves.
 602         // A high value here results in slow changing range (0.0025)
 603         // SUGG: This could be dynamically adjusted so that when
 604         //       the camera is turning, this is lower
 605         //f32 min_time_per_range = 0.0010; // Up to 0.4.7
 606         f32 min_time_per_range = 0.0005;
 607         if(m_time_per_range < min_time_per_range)
 608         {
 609                 m_time_per_range = min_time_per_range;
 610                 //dstream<<"m_time_per_range="<<m_time_per_range<<" (min)"<<std::endl;
 611         }
 612         else
 613         {
 614                 //dstream<<"m_time_per_range="<<m_time_per_range<<std::endl;
 615         }
 616
 617         f32 wanted_range_change = wanted_frametime_change / m_time_per_range;
 618         // Dampen the change a bit to kill oscillations
 619         //wanted_range_change *= 0.9;
 620         //wanted_range_change *= 0.75;
 621         wanted_range_change *= 0.5;
 622         //dstream<<"wanted_range_change="<<wanted_range_change<<std::endl;
 623
 624         // If needed range change is very small, just return
 625         if(fabs(wanted_range_change) < 0.001)
 626         {
 627                 //dstream<<"ignoring small wanted_range_change"<<std::endl;
 628                 return;
 629         }
 630
 631         new_range += wanted_range_change;
 632
 633         //f32 new_range_unclamped = new_range;
 634         new_range = MYMAX(new_range, viewing_range_min);
 635         new_range = MYMIN(new_range, viewing_range_max);
 636         /*dstream<<"new_range="<<new_range_unclamped
 637                         <<", clamped to "<<new_range<<std::endl;*/
 638
 639         m_range_old = m_draw_control.wanted_range;
 640         m_busytime_old = busytime_in;
 641
 642         m_draw_control.wanted_range = new_range;
 643 }
 644
 645 void Camera::setDigging(s32 button)
 646 {
 647         if (m_digging_button == -1)
 648                 m_digging_button = button;
 649 }
 650
 651 void Camera::wield(const ItemStack &item, u16 playeritem)
 652 {
 653         IItemDefManager *idef = m_gamedef->idef();
 654         std::string itemname = item.getDefinition(idef).name;
 655         m_wield_mesh_next = idef->getWieldMesh(itemname, m_gamedef);
 656         if(playeritem != m_previous_playeritem &&
 657                         !(m_previous_itemname == "" && itemname == "")) {
 658                 m_previous_playeritem = playeritem;
 659                 m_previous_itemname = itemname;
 660                 if(m_wield_change_timer >= 0.125)
 661                         m_wield_change_timer = -0.125;
 662                 else if(m_wield_change_timer > 0) {
 663                         m_wield_change_timer = -m_wield_change_timer;
 664                 }
 665         } else {
 666                 if(m_wield_mesh_next) {
 667                         m_wieldnode->setMesh(m_wield_mesh_next);
 668                         m_wieldnode->setVisible(true);
 669                 } else {
 670                         m_wieldnode->setVisible(false);
 671                 }
 672                 m_wield_mesh_next = NULL;
 673                 if(m_previous_itemname != itemname) {
 674                         m_previous_itemname = itemname;
 675                         m_wield_change_timer = 0;
 676                 }
 677                 else
 678                         m_wield_change_timer = 0.125;
 679         }
 680 }
 681
 682 void Camera::drawWieldedTool()
 683 {
 684         // Set vertex colors of wield mesh according to light level
 685         u8 li = m_wieldlight;
 686         video::SColor color(255,li,li,li);
 687         setMeshColor(m_wieldnode->getMesh(), color);
 688
 689         // Clear Z buffer
 690         m_wieldmgr->getVideoDriver()->clearZBuffer();
 691
 692         // Draw the wielded node (in a separate scene manager)
 693         scene::ICameraSceneNode* cam = m_wieldmgr->getActiveCamera();
 694         cam->setAspectRatio(m_cameranode->getAspectRatio());
 695         cam->setFOV(72.0*M_PI/180.0);
 696         cam->setNearValue(0.1);
 697         cam->setFarValue(100);
 698         m_wieldmgr->drawAll();
 699 }