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         /* TODO: Add a callback function so these can be updated when a setting
 102          *       changes.  At this point in time it doesn't matter (e.g. /set
 103          *       is documented to change server settings only)
 104          *
 105          * TODO: Local caching of settings is not optimal and should at some stage
 106          *       be updated to use a global settings object for getting thse values
 107          *       (as opposed to the this local caching). This can be addressed in
 108          *       a later release.
 109          */
 110         m_cache_fall_bobbing_amount = g_settings->getFloat("fall_bobbing_amount");
 111         m_cache_view_bobbing_amount = g_settings->getFloat("view_bobbing_amount");
 112         m_cache_wanted_fps          = g_settings->getFloat("wanted_fps");
 113         m_cache_fov                 = g_settings->getFloat("fov");
 114         m_cache_view_bobbing        = g_settings->getBool("view_bobbing");
 115 }
 116
 117 Camera::~Camera()
 118 {
 119         m_wieldmgr->drop();
 120 }
 121
 122 bool Camera::successfullyCreated(std::wstring& error_message)
 123 {
 124         if (m_playernode == NULL)
 125         {
 126                 error_message = L"Failed to create the player scene node";
 127                 return false;
 128         }
 129         if (m_headnode == NULL)
 130         {
 131                 error_message = L"Failed to create the head scene node";
 132                 return false;
 133         }
 134         if (m_cameranode == NULL)
 135         {
 136                 error_message = L"Failed to create the camera scene node";
 137                 return false;
 138         }
 139         if (m_wieldmgr == NULL)
 140         {
 141                 error_message = L"Failed to create the wielded item scene manager";
 142                 return false;
 143         }
 144         if (m_wieldnode == NULL)
 145         {
 146                 error_message = L"Failed to create the wielded item scene node";
 147                 return false;
 148         }
 149         return true;
 150 }
 151
 152 // Returns the fractional part of x
 153 inline f32 my_modf(f32 x)
 154 {
 155         double dummy;
 156         return modf(x, &dummy);
 157 }
 158
 159 void Camera::step(f32 dtime)
 160 {
 161         if(m_view_bobbing_fall > 0)
 162         {
 163                 m_view_bobbing_fall -= 3 * dtime;
 164                 if(m_view_bobbing_fall <= 0)
 165                         m_view_bobbing_fall = -1; // Mark the effect as finished
 166         }
 167
 168         bool was_under_zero = m_wield_change_timer < 0;
 169         m_wield_change_timer = MYMIN(m_wield_change_timer + dtime, 0.125);
 170
 171         if (m_wield_change_timer >= 0 && was_under_zero)
 172                 m_wieldnode->setItem(m_wield_item_next, m_gamedef);
 173
 174         if (m_view_bobbing_state != 0)
 175         {
 176                 //f32 offset = dtime * m_view_bobbing_speed * 0.035;
 177                 f32 offset = dtime * m_view_bobbing_speed * 0.030;
 178                 if (m_view_bobbing_state == 2)
 179                 {
 180 #if 0
 181                         // Animation is getting turned off
 182                         if (m_view_bobbing_anim < 0.5)
 183                                 m_view_bobbing_anim -= offset;
 184                         else
 185                                 m_view_bobbing_anim += offset;
 186                         if (m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1)
 187                         {
 188                                 m_view_bobbing_anim = 0;
 189                                 m_view_bobbing_state = 0;
 190                         }
 191 #endif
 192 #if 1
 193                         // Animation is getting turned off
 194                         if(m_view_bobbing_anim < 0.25)
 195                         {
 196                                 m_view_bobbing_anim -= offset;
 197                         } else if(m_view_bobbing_anim > 0.75) {
 198                                 m_view_bobbing_anim += offset;
 199                         }
 200                         if(m_view_bobbing_anim < 0.5)
 201                         {
 202                                 m_view_bobbing_anim += offset;
 203                                 if(m_view_bobbing_anim > 0.5)
 204                                         m_view_bobbing_anim = 0.5;
 205                         } else {
 206                                 m_view_bobbing_anim -= offset;
 207                                 if(m_view_bobbing_anim < 0.5)
 208                                         m_view_bobbing_anim = 0.5;
 209                         }
 210                         if(m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1 ||
 211                                         fabs(m_view_bobbing_anim - 0.5) < 0.01)
 212                         {
 213                                 m_view_bobbing_anim = 0;
 214                                 m_view_bobbing_state = 0;
 215                         }
 216 #endif
 217                 }
 218                 else
 219                 {
 220                         float was = m_view_bobbing_anim;
 221                         m_view_bobbing_anim = my_modf(m_view_bobbing_anim + offset);
 222                         bool step = (was == 0 ||
 223                                         (was < 0.5f && m_view_bobbing_anim >= 0.5f) ||
 224                                         (was > 0.5f && m_view_bobbing_anim <= 0.5f));
 225                         if(step)
 226                         {
 227                                 MtEvent *e = new SimpleTriggerEvent("ViewBobbingStep");
 228                                 m_gamedef->event()->put(e);
 229                         }
 230                 }
 231         }
 232
 233         if (m_digging_button != -1)
 234         {
 235                 f32 offset = dtime * 3.5;
 236                 float m_digging_anim_was = m_digging_anim;
 237                 m_digging_anim += offset;
 238                 if (m_digging_anim >= 1)
 239                 {
 240                         m_digging_anim = 0;
 241                         m_digging_button = -1;
 242                 }
 243                 float lim = 0.15;
 244                 if(m_digging_anim_was < lim && m_digging_anim >= lim)
 245                 {
 246                         if(m_digging_button == 0)
 247                         {
 248                                 MtEvent *e = new SimpleTriggerEvent("CameraPunchLeft");
 249                                 m_gamedef->event()->put(e);
 250                         } else if(m_digging_button == 1) {
 251                                 MtEvent *e = new SimpleTriggerEvent("CameraPunchRight");
 252                                 m_gamedef->event()->put(e);
 253                         }
 254                 }
 255         }
 256 }
 257
 258 void Camera::update(LocalPlayer* player, f32 frametime, f32 busytime,
 259                 f32 tool_reload_ratio, ClientEnvironment &c_env)
 260 {
 261         // Get player position
 262         // Smooth the movement when walking up stairs
 263         v3f old_player_position = m_playernode->getPosition();
 264         v3f player_position = player->getPosition();
 265         if (player->isAttached && player->parent)
 266                 player_position = player->parent->getPosition();
 267         //if(player->touching_ground && player_position.Y > old_player_position.Y)
 268         if(player->touching_ground &&
 269                         player_position.Y > old_player_position.Y)
 270         {
 271                 f32 oldy = old_player_position.Y;
 272                 f32 newy = player_position.Y;
 273                 f32 t = exp(-23*frametime);
 274                 player_position.Y = oldy * t + newy * (1-t);
 275         }
 276
 277         // Set player node transformation
 278         m_playernode->setPosition(player_position);
 279         m_playernode->setRotation(v3f(0, -1 * player->getYaw(), 0));
 280         m_playernode->updateAbsolutePosition();
 281
 282         // Get camera tilt timer (hurt animation)
 283         float cameratilt = fabs(fabs(player->hurt_tilt_timer-0.75)-0.75);
 284
 285         // Fall bobbing animation
 286         float fall_bobbing = 0;
 287         if(player->camera_impact >= 1 && m_camera_mode < CAMERA_MODE_THIRD)
 288         {
 289                 if(m_view_bobbing_fall == -1) // Effect took place and has finished
 290                         player->camera_impact = m_view_bobbing_fall = 0;
 291                 else if(m_view_bobbing_fall == 0) // Initialize effect
 292                         m_view_bobbing_fall = 1;
 293
 294                 // Convert 0 -> 1 to 0 -> 1 -> 0
 295                 fall_bobbing = m_view_bobbing_fall < 0.5 ? m_view_bobbing_fall * 2 : -(m_view_bobbing_fall - 0.5) * 2 + 1;
 296                 // Smoothen and invert the above
 297                 fall_bobbing = sin(fall_bobbing * 0.5 * M_PI) * -1;
 298                 // Amplify according to the intensity of the impact
 299                 fall_bobbing *= (1 - rangelim(50 / player->camera_impact, 0, 1)) * 5;
 300
 301                 fall_bobbing *= m_cache_fall_bobbing_amount;
 302         }
 303
 304         // Calculate players eye offset for different camera modes
 305         v3f PlayerEyeOffset = player->getEyeOffset();
 306         if (m_camera_mode == CAMERA_MODE_FIRST)
 307                 PlayerEyeOffset += player->eye_offset_first;
 308         else
 309                 PlayerEyeOffset += player->eye_offset_third;
 310
 311         // Set head node transformation
 312         m_headnode->setPosition(PlayerEyeOffset+v3f(0,cameratilt*-player->hurt_tilt_strength+fall_bobbing,0));
 313         m_headnode->setRotation(v3f(player->getPitch(), 0, cameratilt*player->hurt_tilt_strength));
 314         m_headnode->updateAbsolutePosition();
 315
 316         // Compute relative camera position and target
 317         v3f rel_cam_pos = v3f(0,0,0);
 318         v3f rel_cam_target = v3f(0,0,1);
 319         v3f rel_cam_up = v3f(0,1,0);
 320
 321         if (m_view_bobbing_anim != 0 && m_camera_mode < CAMERA_MODE_THIRD)
 322         {
 323                 f32 bobfrac = my_modf(m_view_bobbing_anim * 2);
 324                 f32 bobdir = (m_view_bobbing_anim < 0.5) ? 1.0 : -1.0;
 325
 326                 #if 1
 327                 f32 bobknob = 1.2;
 328                 f32 bobtmp = sin(pow(bobfrac, bobknob) * M_PI);
 329                 //f32 bobtmp2 = cos(pow(bobfrac, bobknob) * M_PI);
 330
 331                 v3f bobvec = v3f(
 332                         0.3 * bobdir * sin(bobfrac * M_PI),
 333                         -0.28 * bobtmp * bobtmp,
 334                         0.);
 335
 336                 //rel_cam_pos += 0.2 * bobvec;
 337                 //rel_cam_target += 0.03 * bobvec;
 338                 //rel_cam_up.rotateXYBy(0.02 * bobdir * bobtmp * M_PI);
 339                 float f = 1.0;
 340                 f *= m_cache_view_bobbing_amount;
 341                 rel_cam_pos += bobvec * f;
 342                 //rel_cam_target += 0.995 * bobvec * f;
 343                 rel_cam_target += bobvec * f;
 344                 rel_cam_target.Z -= 0.005 * bobvec.Z * f;
 345                 //rel_cam_target.X -= 0.005 * bobvec.X * f;
 346                 //rel_cam_target.Y -= 0.005 * bobvec.Y * f;
 347                 rel_cam_up.rotateXYBy(-0.03 * bobdir * bobtmp * M_PI * f);
 348                 #else
 349                 f32 angle_deg = 1 * bobdir * sin(bobfrac * M_PI);
 350                 f32 angle_rad = angle_deg * M_PI / 180;
 351                 f32 r = 0.05;
 352                 v3f off = v3f(
 353                         r * sin(angle_rad),
 354                         r * (cos(angle_rad) - 1),
 355                         0);
 356                 rel_cam_pos += off;
 357                 //rel_cam_target += off;
 358                 rel_cam_up.rotateXYBy(angle_deg);
 359                 #endif
 360
 361         }
 362
 363         // Compute absolute camera position and target
 364         m_headnode->getAbsoluteTransformation().transformVect(m_camera_position, rel_cam_pos);
 365         m_headnode->getAbsoluteTransformation().rotateVect(m_camera_direction, rel_cam_target - rel_cam_pos);
 366
 367         v3f abs_cam_up;
 368         m_headnode->getAbsoluteTransformation().rotateVect(abs_cam_up, rel_cam_up);
 369
 370         // Seperate camera position for calculation
 371         v3f my_cp = m_camera_position;
 372
 373         // Reposition the camera for third person view
 374         if (m_camera_mode > CAMERA_MODE_FIRST)
 375         {
 376                 if (m_camera_mode == CAMERA_MODE_THIRD_FRONT)
 377                         m_camera_direction *= -1;
 378
 379                 my_cp.Y += 2;
 380
 381                 // Calculate new position
 382                 bool abort = false;
 383                 for (int i = BS; i <= BS*2.75; i++)
 384                 {
 385                         my_cp.X = m_camera_position.X + m_camera_direction.X*-i;
 386                         my_cp.Z = m_camera_position.Z + m_camera_direction.Z*-i;
 387                         if (i > 12)
 388                                 my_cp.Y = m_camera_position.Y + (m_camera_direction.Y*-i);
 389
 390                         // Prevent camera positioned inside nodes
 391                         INodeDefManager *nodemgr = m_gamedef->ndef();
 392                         MapNode n = c_env.getClientMap().getNodeNoEx(floatToInt(my_cp, BS));
 393                         const ContentFeatures& features = nodemgr->get(n);
 394                         if(features.walkable)
 395                         {
 396                                 my_cp.X += m_camera_direction.X*-1*-BS/2;
 397                                 my_cp.Z += m_camera_direction.Z*-1*-BS/2;
 398                                 my_cp.Y += m_camera_direction.Y*-1*-BS/2;
 399                                 abort = true;
 400                                 break;
 401                         }
 402                 }
 403
 404                 // If node blocks camera position don't move y to heigh
 405                 if (abort && my_cp.Y > player_position.Y+BS*2)
 406                         my_cp.Y = player_position.Y+BS*2;
 407         }
 408
 409         // Update offset if too far away from the center of the map
 410         m_camera_offset.X += CAMERA_OFFSET_STEP*
 411                         (((s16)(my_cp.X/BS) - m_camera_offset.X)/CAMERA_OFFSET_STEP);
 412         m_camera_offset.Y += CAMERA_OFFSET_STEP*
 413                         (((s16)(my_cp.Y/BS) - m_camera_offset.Y)/CAMERA_OFFSET_STEP);
 414         m_camera_offset.Z += CAMERA_OFFSET_STEP*
 415                         (((s16)(my_cp.Z/BS) - m_camera_offset.Z)/CAMERA_OFFSET_STEP);
 416
 417         // Set camera node transformation
 418         m_cameranode->setPosition(my_cp-intToFloat(m_camera_offset, BS));
 419         m_cameranode->setUpVector(abs_cam_up);
 420         // *100.0 helps in large map coordinates
 421         m_cameranode->setTarget(my_cp-intToFloat(m_camera_offset, BS) + 100 * m_camera_direction);
 422
 423         // update the camera position in front-view mode to render blocks behind player
 424         if (m_camera_mode == CAMERA_MODE_THIRD_FRONT)
 425                 m_camera_position = my_cp;
 426
 427         // Get FOV setting
 428         f32 fov_degrees = m_cache_fov;
 429         fov_degrees = MYMAX(fov_degrees, 10.0);
 430         fov_degrees = MYMIN(fov_degrees, 170.0);
 431
 432         // FOV and aspect ratio
 433         m_aspect = (f32) porting::getWindowSize().X / (f32) porting::getWindowSize().Y;
 434         m_fov_y = fov_degrees * M_PI / 180.0;
 435         // Increase vertical FOV on lower aspect ratios (<16:10)
 436         m_fov_y *= MYMAX(1.0, MYMIN(1.4, sqrt(16./10. / m_aspect)));
 437         m_fov_x = 2 * atan(m_aspect * tan(0.5 * m_fov_y));
 438         m_cameranode->setAspectRatio(m_aspect);
 439         m_cameranode->setFOV(m_fov_y);
 440
 441         // Position the wielded item
 442         //v3f wield_position = v3f(45, -35, 65);
 443         v3f wield_position = v3f(55, -35, 65);
 444         //v3f wield_rotation = v3f(-100, 120, -100);
 445         v3f wield_rotation = v3f(-100, 120, -100);
 446         wield_position.Y += fabs(m_wield_change_timer)*320 - 40;
 447         if(m_digging_anim < 0.05 || m_digging_anim > 0.5)
 448         {
 449                 f32 frac = 1.0;
 450                 if(m_digging_anim > 0.5)
 451                         frac = 2.0 * (m_digging_anim - 0.5);
 452                 // This value starts from 1 and settles to 0
 453                 f32 ratiothing = pow((1.0f - tool_reload_ratio), 0.5f);
 454                 //f32 ratiothing2 = pow(ratiothing, 0.5f);
 455                 f32 ratiothing2 = (easeCurve(ratiothing*0.5))*2.0;
 456                 wield_position.Y -= frac * 25.0 * pow(ratiothing2, 1.7f);
 457                 //wield_position.Z += frac * 5.0 * ratiothing2;
 458                 wield_position.X -= frac * 35.0 * pow(ratiothing2, 1.1f);
 459                 wield_rotation.Y += frac * 70.0 * pow(ratiothing2, 1.4f);
 460                 //wield_rotation.X -= frac * 15.0 * pow(ratiothing2, 1.4f);
 461                 //wield_rotation.Z += frac * 15.0 * pow(ratiothing2, 1.0f);
 462         }
 463         if (m_digging_button != -1)
 464         {
 465                 f32 digfrac = m_digging_anim;
 466                 wield_position.X -= 50 * sin(pow(digfrac, 0.8f) * M_PI);
 467                 wield_position.Y += 24 * sin(digfrac * 1.8 * M_PI);
 468                 wield_position.Z += 25 * 0.5;
 469
 470                 // Euler angles are PURE EVIL, so why not use quaternions?
 471                 core::quaternion quat_begin(wield_rotation * core::DEGTORAD);
 472                 core::quaternion quat_end(v3f(80, 30, 100) * core::DEGTORAD);
 473                 core::quaternion quat_slerp;
 474                 quat_slerp.slerp(quat_begin, quat_end, sin(digfrac * M_PI));
 475                 quat_slerp.toEuler(wield_rotation);
 476                 wield_rotation *= core::RADTODEG;
 477         } else {
 478                 f32 bobfrac = my_modf(m_view_bobbing_anim);
 479                 wield_position.X -= sin(bobfrac*M_PI*2.0) * 3.0;
 480                 wield_position.Y += sin(my_modf(bobfrac*2.0)*M_PI) * 3.0;
 481         }
 482         m_wieldnode->setPosition(wield_position);
 483         m_wieldnode->setRotation(wield_rotation);
 484
 485         // Shine light upon the wield mesh
 486         video::SColor black(255,0,0,0);
 487         m_wieldmgr->setAmbientLight(player->light_color.getInterpolated(black, 0.7));
 488         m_wieldlightnode->getLightData().DiffuseColor = player->light_color.getInterpolated(black, 0.3);
 489         m_wieldlightnode->setPosition(v3f(30+5*sin(2*player->getYaw()*M_PI/180), -50, 0));
 490
 491         // Render distance feedback loop
 492         updateViewingRange(frametime, busytime);
 493
 494         // If the player is walking, swimming, or climbing,
 495         // view bobbing is enabled and free_move is off,
 496         // start (or continue) the view bobbing animation.
 497         v3f speed = player->getSpeed();
 498         const bool movement_XZ = hypot(speed.X, speed.Z) > BS;
 499         const bool movement_Y = abs(speed.Y) > BS;
 500
 501         const bool walking = movement_XZ && player->touching_ground;
 502         const bool swimming = (movement_XZ || player->swimming_vertical) && player->in_liquid;
 503         const bool climbing = movement_Y && player->is_climbing;
 504         if ((walking || swimming || climbing) &&
 505                         m_cache_view_bobbing &&
 506                         (!g_settings->getBool("free_move") || !m_gamedef->checkLocalPrivilege("fly")))
 507         {
 508                 // Start animation
 509                 m_view_bobbing_state = 1;
 510                 m_view_bobbing_speed = MYMIN(speed.getLength(), 40);
 511         }
 512         else if (m_view_bobbing_state == 1)
 513         {
 514                 // Stop animation
 515                 m_view_bobbing_state = 2;
 516                 m_view_bobbing_speed = 60;
 517         }
 518 }
 519
 520 void Camera::updateViewingRange(f32 frametime_in, f32 busytime_in)
 521 {
 522         if (m_draw_control.range_all)
 523                 return;
 524
 525         m_added_busytime += busytime_in;
 526         m_added_frames += 1;
 527
 528         m_frametime_counter -= frametime_in;
 529         if (m_frametime_counter > 0)
 530                 return;
 531         m_frametime_counter = 0.2; // Same as ClientMap::updateDrawList interval
 532
 533         /*dstream<<__FUNCTION_NAME
 534                         <<": Collected "<<m_added_frames<<" frames, total of "
 535                         <<m_added_busytime<<"s."<<std::endl;
 536
 537         dstream<<"m_draw_control.blocks_drawn="
 538                         <<m_draw_control.blocks_drawn
 539                         <<", m_draw_control.blocks_would_have_drawn="
 540                         <<m_draw_control.blocks_would_have_drawn
 541                         <<std::endl;*/
 542
 543         // Get current viewing range and FPS settings
 544         f32 viewing_range_min = g_settings->getFloat("viewing_range_nodes_min");
 545         viewing_range_min = MYMAX(15.0, viewing_range_min);
 546
 547         f32 viewing_range_max = g_settings->getFloat("viewing_range_nodes_max");
 548         viewing_range_max = MYMAX(viewing_range_min, viewing_range_max);
 549
 550         // Immediately apply hard limits
 551         if(m_draw_control.wanted_range < viewing_range_min)
 552                 m_draw_control.wanted_range = viewing_range_min;
 553         if(m_draw_control.wanted_range > viewing_range_max)
 554                 m_draw_control.wanted_range = viewing_range_max;
 555
 556         // Just so big a value that everything rendered is visible
 557         // Some more allowance than viewing_range_max * BS because of clouds,
 558         // active objects, etc.
 559         if(viewing_range_max < 200*BS)
 560                 m_cameranode->setFarValue(200 * BS * 10);
 561         else
 562                 m_cameranode->setFarValue(viewing_range_max * BS * 10);
 563
 564         f32 wanted_fps = m_cache_wanted_fps;
 565         wanted_fps = MYMAX(wanted_fps, 1.0);
 566         f32 wanted_frametime = 1.0 / wanted_fps;
 567
 568         m_draw_control.wanted_min_range = viewing_range_min;
 569         m_draw_control.wanted_max_blocks = (2.0*m_draw_control.blocks_would_have_drawn)+1;
 570         if (m_draw_control.wanted_max_blocks < 10)
 571                 m_draw_control.wanted_max_blocks = 10;
 572
 573         f32 block_draw_ratio = 1.0;
 574         if (m_draw_control.blocks_would_have_drawn != 0)
 575         {
 576                 block_draw_ratio = (f32)m_draw_control.blocks_drawn
 577                         / (f32)m_draw_control.blocks_would_have_drawn;
 578         }
 579
 580         // Calculate the average frametime in the case that all wanted
 581         // blocks had been drawn
 582         f32 frametime = m_added_busytime / m_added_frames / block_draw_ratio;
 583
 584         m_added_busytime = 0.0;
 585         m_added_frames = 0;
 586
 587         f32 wanted_frametime_change = wanted_frametime - frametime;
 588         //dstream<<"wanted_frametime_change="<<wanted_frametime_change<<std::endl;
 589         g_profiler->avg("wanted_frametime_change", wanted_frametime_change);
 590
 591         // If needed frametime change is small, just return
 592         // This value was 0.4 for many months until 2011-10-18 by c55;
 593         if (fabs(wanted_frametime_change) < wanted_frametime*0.33)
 594         {
 595                 //dstream<<"ignoring small wanted_frametime_change"<<std::endl;
 596                 return;
 597         }
 598
 599         f32 range = m_draw_control.wanted_range;
 600         f32 new_range = range;
 601
 602         f32 d_range = range - m_range_old;
 603         f32 d_busytime = busytime_in - m_busytime_old;
 604         if (d_range != 0)
 605         {
 606                 m_time_per_range = d_busytime / d_range;
 607         }
 608         //dstream<<"time_per_range="<<m_time_per_range<<std::endl;
 609         g_profiler->avg("time_per_range", m_time_per_range);
 610
 611         // The minimum allowed calculated frametime-range derivative:
 612         // Practically this sets the maximum speed of changing the range.
 613         // The lower this value, the higher the maximum changing speed.
 614         // A low value here results in wobbly range (0.001)
 615         // A low value can cause oscillation in very nonlinear time/range curves.
 616         // A high value here results in slow changing range (0.0025)
 617         // SUGG: This could be dynamically adjusted so that when
 618         //       the camera is turning, this is lower
 619         //f32 min_time_per_range = 0.0010; // Up to 0.4.7
 620         f32 min_time_per_range = 0.0005;
 621         if(m_time_per_range < min_time_per_range)
 622         {
 623                 m_time_per_range = min_time_per_range;
 624                 //dstream<<"m_time_per_range="<<m_time_per_range<<" (min)"<<std::endl;
 625         }
 626         else
 627         {
 628                 //dstream<<"m_time_per_range="<<m_time_per_range<<std::endl;
 629         }
 630
 631         f32 wanted_range_change = wanted_frametime_change / m_time_per_range;
 632         // Dampen the change a bit to kill oscillations
 633         //wanted_range_change *= 0.9;
 634         //wanted_range_change *= 0.75;
 635         wanted_range_change *= 0.5;
 636         //dstream<<"wanted_range_change="<<wanted_range_change<<std::endl;
 637
 638         // If needed range change is very small, just return
 639         if(fabs(wanted_range_change) < 0.001)
 640         {
 641                 //dstream<<"ignoring small wanted_range_change"<<std::endl;
 642                 return;
 643         }
 644
 645         new_range += wanted_range_change;
 646
 647         //f32 new_range_unclamped = new_range;
 648         new_range = MYMAX(new_range, viewing_range_min);
 649         new_range = MYMIN(new_range, viewing_range_max);
 650         /*dstream<<"new_range="<<new_range_unclamped
 651                         <<", clamped to "<<new_range<<std::endl;*/
 652
 653         m_range_old = m_draw_control.wanted_range;
 654         m_busytime_old = busytime_in;
 655
 656         m_draw_control.wanted_range = new_range;
 657 }
 658
 659 void Camera::setDigging(s32 button)
 660 {
 661         if (m_digging_button == -1)
 662                 m_digging_button = button;
 663 }
 664
 665 void Camera::wield(const ItemStack &item)
 666 {
 667         if (item.name != m_wield_item_next.name) {
 668                 m_wield_item_next = item;
 669                 if (m_wield_change_timer > 0)
 670                         m_wield_change_timer = -m_wield_change_timer;
 671                 else if (m_wield_change_timer == 0)
 672                         m_wield_change_timer = -0.001;
 673         }
 674 }
 675
 676 void Camera::drawWieldedTool(irr::core::matrix4* translation)
 677 {
 678         // Clear Z buffer so that the wielded tool stay in front of world geometry
 679         m_wieldmgr->getVideoDriver()->clearZBuffer();
 680
 681         // Draw the wielded node (in a separate scene manager)
 682         scene::ICameraSceneNode* cam = m_wieldmgr->getActiveCamera();
 683         cam->setAspectRatio(m_cameranode->getAspectRatio());
 684         cam->setFOV(72.0*M_PI/180.0);
 685         cam->setNearValue(0.1);
 686         cam->setFarValue(1000);
 687         if (translation != NULL)
 688         {
 689                 irr::core::matrix4 startMatrix = cam->getAbsoluteTransformation();
 690                 irr::core::vector3df focusPoint = (cam->getTarget()
 691                                 - cam->getAbsolutePosition()).setLength(1)
 692                                 + cam->getAbsolutePosition();
 693
 694                 irr::core::vector3df camera_pos =
 695                                 (startMatrix * *translation).getTranslation();
 696                 cam->setPosition(camera_pos);
 697                 cam->setTarget(focusPoint);
 698         }
 699         m_wieldmgr->drawAll();
 700 }