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
  40 Camera::Camera(scene::ISceneManager* smgr, MapDrawControl& draw_control,
  41                 IGameDef *gamedef):
  42         m_smgr(smgr),
  43         m_playernode(NULL),
  44         m_headnode(NULL),
  45         m_cameranode(NULL),
  46
  47         m_wieldmgr(NULL),
  48         m_wieldnode(NULL),
  49         m_wieldlight(0),
  50
  51         m_draw_control(draw_control),
  52         m_gamedef(gamedef),
  53
  54         m_camera_position(0,0,0),
  55         m_camera_direction(0,0,0),
  56
  57         m_aspect(1.0),
  58         m_fov_x(1.0),
  59         m_fov_y(1.0),
  60
  61         m_added_busytime(0),
  62         m_added_frames(0),
  63         m_range_old(0),
  64         m_busytime_old(0),
  65         m_frametime_counter(0),
  66         m_time_per_range(30. / 50), // a sane default of 30ms per 50 nodes of range
  67
  68         m_view_bobbing_anim(0),
  69         m_view_bobbing_state(0),
  70         m_view_bobbing_speed(0),
  71         m_view_bobbing_fall(0),
  72
  73         m_digging_anim(0),
  74         m_digging_button(-1),
  75         m_dummymesh(createCubeMesh(v3f(1,1,1))),
  76
  77         m_wield_change_timer(0.125),
  78         m_wield_mesh_next(NULL),
  79         m_previous_playeritem(-1),
  80         m_previous_itemname("")
  81 {
  82         //dstream<<__FUNCTION_NAME<<std::endl;
  83
  84         // note: making the camera node a child of the player node
  85         // would lead to unexpected behaviour, so we don't do that.
  86         m_playernode = smgr->addEmptySceneNode(smgr->getRootSceneNode());
  87         m_headnode = smgr->addEmptySceneNode(m_playernode);
  88         m_cameranode = smgr->addCameraSceneNode(smgr->getRootSceneNode());
  89         m_cameranode->bindTargetAndRotation(true);
  90
  91         // This needs to be in its own scene manager. It is drawn after
  92         // all other 3D scene nodes and before the GUI.
  93         m_wieldmgr = smgr->createNewSceneManager();
  94         m_wieldmgr->addCameraSceneNode();
  95         m_wieldnode = m_wieldmgr->addMeshSceneNode(m_dummymesh, NULL);  // need a dummy mesh
  96 }
  97
  98 Camera::~Camera()
  99 {
 100         m_wieldmgr->drop();
 101
 102         delete m_dummymesh;
 103 }
 104
 105 bool Camera::successfullyCreated(std::wstring& error_message)
 106 {
 107         if (m_playernode == NULL)
 108         {
 109                 error_message = L"Failed to create the player scene node";
 110                 return false;
 111         }
 112         if (m_headnode == NULL)
 113         {
 114                 error_message = L"Failed to create the head scene node";
 115                 return false;
 116         }
 117         if (m_cameranode == NULL)
 118         {
 119                 error_message = L"Failed to create the camera scene node";
 120                 return false;
 121         }
 122         if (m_wieldmgr == NULL)
 123         {
 124                 error_message = L"Failed to create the wielded item scene manager";
 125                 return false;
 126         }
 127         if (m_wieldnode == NULL)
 128         {
 129                 error_message = L"Failed to create the wielded item scene node";
 130                 return false;
 131         }
 132         return true;
 133 }
 134
 135 // Returns the fractional part of x
 136 inline f32 my_modf(f32 x)
 137 {
 138         double dummy;
 139         return modf(x, &dummy);
 140 }
 141
 142 void Camera::step(f32 dtime)
 143 {
 144         if(m_view_bobbing_fall > 0)
 145         {
 146                 m_view_bobbing_fall -= 3 * dtime;
 147                 if(m_view_bobbing_fall <= 0)
 148                         m_view_bobbing_fall = -1; // Mark the effect as finished
 149         }
 150
 151         bool was_under_zero = m_wield_change_timer < 0;
 152         if(m_wield_change_timer < 0.125)
 153                 m_wield_change_timer += dtime;
 154         if(m_wield_change_timer > 0.125)
 155                 m_wield_change_timer = 0.125;
 156
 157         if(m_wield_change_timer >= 0 && was_under_zero) {
 158                 if(m_wield_mesh_next) {
 159                         m_wieldnode->setMesh(m_wield_mesh_next);
 160                         m_wieldnode->setVisible(true);
 161                 } else {
 162                         m_wieldnode->setVisible(false);
 163                 }
 164                 m_wield_mesh_next = NULL;
 165         }
 166
 167         if (m_view_bobbing_state != 0)
 168         {
 169                 //f32 offset = dtime * m_view_bobbing_speed * 0.035;
 170                 f32 offset = dtime * m_view_bobbing_speed * 0.030;
 171                 if (m_view_bobbing_state == 2)
 172                 {
 173 #if 0
 174                         // Animation is getting turned off
 175                         if (m_view_bobbing_anim < 0.5)
 176                                 m_view_bobbing_anim -= offset;
 177                         else
 178                                 m_view_bobbing_anim += offset;
 179                         if (m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1)
 180                         {
 181                                 m_view_bobbing_anim = 0;
 182                                 m_view_bobbing_state = 0;
 183                         }
 184 #endif
 185 #if 1
 186                         // Animation is getting turned off
 187                         if(m_view_bobbing_anim < 0.25){
 188                                 m_view_bobbing_anim -= offset;
 189                         } else if(m_view_bobbing_anim > 0.75){
 190                                 m_view_bobbing_anim += offset;
 191                         } if(m_view_bobbing_anim < 0.5){
 192                                 m_view_bobbing_anim += offset;
 193                                 if(m_view_bobbing_anim > 0.5)
 194                                         m_view_bobbing_anim = 0.5;
 195                         } else {
 196                                 m_view_bobbing_anim -= offset;
 197                                 if(m_view_bobbing_anim < 0.5)
 198                                         m_view_bobbing_anim = 0.5;
 199                         }
 200                         if(m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1 ||
 201                                         fabs(m_view_bobbing_anim - 0.5) < 0.01)
 202                         {
 203                                 m_view_bobbing_anim = 0;
 204                                 m_view_bobbing_state = 0;
 205                         }
 206 #endif
 207                 }
 208                 else
 209                 {
 210                         float was = m_view_bobbing_anim;
 211                         m_view_bobbing_anim = my_modf(m_view_bobbing_anim + offset);
 212                         bool step = (was == 0 ||
 213                                         (was < 0.5f && m_view_bobbing_anim >= 0.5f) ||
 214                                         (was > 0.5f && m_view_bobbing_anim <= 0.5f));
 215                         if(step){
 216                                 MtEvent *e = new SimpleTriggerEvent("ViewBobbingStep");
 217                                 m_gamedef->event()->put(e);
 218                         }
 219                 }
 220         }
 221
 222         if (m_digging_button != -1)
 223         {
 224                 f32 offset = dtime * 3.5;
 225                 float m_digging_anim_was = m_digging_anim;
 226                 m_digging_anim += offset;
 227                 if (m_digging_anim >= 1)
 228                 {
 229                         m_digging_anim = 0;
 230                         m_digging_button = -1;
 231                 }
 232                 float lim = 0.15;
 233                 if(m_digging_anim_was < lim && m_digging_anim >= lim)
 234                 {
 235                         if(m_digging_button == 0){
 236                                 MtEvent *e = new SimpleTriggerEvent("CameraPunchLeft");
 237                                 m_gamedef->event()->put(e);
 238                         } else if(m_digging_button == 1){
 239                                 MtEvent *e = new SimpleTriggerEvent("CameraPunchRight");
 240                                 m_gamedef->event()->put(e);
 241                         }
 242                 }
 243         }
 244 }
 245
 246 void Camera::update(LocalPlayer* player, f32 frametime, f32 busytime,
 247                 v2u32 screensize, f32 tool_reload_ratio)
 248 {
 249         // Get player position
 250         // Smooth the movement when walking up stairs
 251         v3f old_player_position = m_playernode->getPosition();
 252         v3f player_position = player->getPosition();
 253         if (player->isAttached && player->parent)
 254                 player_position = player->parent->getPosition();
 255         //if(player->touching_ground && player_position.Y > old_player_position.Y)
 256         if(player->touching_ground &&
 257                         player_position.Y > old_player_position.Y)
 258         {
 259                 f32 oldy = old_player_position.Y;
 260                 f32 newy = player_position.Y;
 261                 f32 t = exp(-23*frametime);
 262                 player_position.Y = oldy * t + newy * (1-t);
 263         }
 264
 265         // Set player node transformation
 266         m_playernode->setPosition(player_position);
 267         m_playernode->setRotation(v3f(0, -1 * player->getYaw(), 0));
 268         m_playernode->updateAbsolutePosition();
 269
 270         // Get camera tilt timer (hurt animation)
 271         float cameratilt = fabs(fabs(player->hurt_tilt_timer-0.75)-0.75);
 272
 273         // Fall bobbing animation
 274         float fall_bobbing = 0;
 275         if(player->camera_impact >= 1)
 276         {
 277                 if(m_view_bobbing_fall == -1) // Effect took place and has finished
 278                         player->camera_impact = m_view_bobbing_fall = 0;
 279                 else if(m_view_bobbing_fall == 0) // Initialize effect
 280                         m_view_bobbing_fall = 1;
 281
 282                 // Convert 0 -> 1 to 0 -> 1 -> 0
 283                 fall_bobbing = m_view_bobbing_fall < 0.5 ? m_view_bobbing_fall * 2 : -(m_view_bobbing_fall - 0.5) * 2 + 1;
 284                 // Smoothen and invert the above
 285                 fall_bobbing = sin(fall_bobbing * 0.5 * M_PI) * -1;
 286                 // Amplify according to the intensity of the impact
 287                 fall_bobbing *= (1 - rangelim(50 / player->camera_impact, 0, 1)) * 5;
 288
 289                 fall_bobbing *= g_settings->getFloat("fall_bobbing_amount");
 290         }
 291
 292         // Set head node transformation
 293         m_headnode->setPosition(player->getEyeOffset()+v3f(0,cameratilt*-player->hurt_tilt_strength+fall_bobbing,0));
 294         m_headnode->setRotation(v3f(player->getPitch(), 0, cameratilt*player->hurt_tilt_strength));
 295         m_headnode->updateAbsolutePosition();
 296
 297         // Compute relative camera position and target
 298         v3f rel_cam_pos = v3f(0,0,0);
 299         v3f rel_cam_target = v3f(0,0,1);
 300         v3f rel_cam_up = v3f(0,1,0);
 301
 302         if (m_view_bobbing_anim != 0)
 303         {
 304                 f32 bobfrac = my_modf(m_view_bobbing_anim * 2);
 305                 f32 bobdir = (m_view_bobbing_anim < 0.5) ? 1.0 : -1.0;
 306
 307                 #if 1
 308                 f32 bobknob = 1.2;
 309                 f32 bobtmp = sin(pow(bobfrac, bobknob) * M_PI);
 310                 //f32 bobtmp2 = cos(pow(bobfrac, bobknob) * M_PI);
 311
 312                 v3f bobvec = v3f(
 313                         0.3 * bobdir * sin(bobfrac * M_PI),
 314                         -0.28 * bobtmp * bobtmp,
 315                         0.);
 316
 317                 //rel_cam_pos += 0.2 * bobvec;
 318                 //rel_cam_target += 0.03 * bobvec;
 319                 //rel_cam_up.rotateXYBy(0.02 * bobdir * bobtmp * M_PI);
 320                 float f = 1.0;
 321                 f *= g_settings->getFloat("view_bobbing_amount");
 322                 rel_cam_pos += bobvec * f;
 323                 //rel_cam_target += 0.995 * bobvec * f;
 324                 rel_cam_target += bobvec * f;
 325                 rel_cam_target.Z -= 0.005 * bobvec.Z * f;
 326                 //rel_cam_target.X -= 0.005 * bobvec.X * f;
 327                 //rel_cam_target.Y -= 0.005 * bobvec.Y * f;
 328                 rel_cam_up.rotateXYBy(-0.03 * bobdir * bobtmp * M_PI * f);
 329                 #else
 330                 f32 angle_deg = 1 * bobdir * sin(bobfrac * M_PI);
 331                 f32 angle_rad = angle_deg * M_PI / 180;
 332                 f32 r = 0.05;
 333                 v3f off = v3f(
 334                         r * sin(angle_rad),
 335                         r * (cos(angle_rad) - 1),
 336                         0);
 337                 rel_cam_pos += off;
 338                 //rel_cam_target += off;
 339                 rel_cam_up.rotateXYBy(angle_deg);
 340                 #endif
 341
 342         }
 343
 344         // Compute absolute camera position and target
 345         m_headnode->getAbsoluteTransformation().transformVect(m_camera_position, rel_cam_pos);
 346         m_headnode->getAbsoluteTransformation().rotateVect(m_camera_direction, rel_cam_target - rel_cam_pos);
 347
 348         v3f abs_cam_up;
 349         m_headnode->getAbsoluteTransformation().rotateVect(abs_cam_up, rel_cam_up);
 350
 351         // Set camera node transformation
 352         m_cameranode->setPosition(m_camera_position);
 353         m_cameranode->setUpVector(abs_cam_up);
 354         // *100.0 helps in large map coordinates
 355         m_cameranode->setTarget(m_camera_position + 100 * m_camera_direction);
 356
 357         // Get FOV setting
 358         f32 fov_degrees = g_settings->getFloat("fov");
 359         fov_degrees = MYMAX(fov_degrees, 10.0);
 360         fov_degrees = MYMIN(fov_degrees, 170.0);
 361
 362         // FOV and aspect ratio
 363         m_aspect = (f32)screensize.X / (f32) screensize.Y;
 364         m_fov_y = fov_degrees * M_PI / 180.0;
 365         // Increase vertical FOV on lower aspect ratios (<16:10)
 366         m_fov_y *= MYMAX(1.0, MYMIN(1.4, sqrt(16./10. / m_aspect)));
 367         m_fov_x = 2 * atan(m_aspect * tan(0.5 * m_fov_y));
 368         m_cameranode->setAspectRatio(m_aspect);
 369         m_cameranode->setFOV(m_fov_y);
 370
 371         // Position the wielded item
 372         //v3f wield_position = v3f(45, -35, 65);
 373         v3f wield_position = v3f(55, -35, 65);
 374         //v3f wield_rotation = v3f(-100, 120, -100);
 375         v3f wield_rotation = v3f(-100, 120, -100);
 376         if(m_wield_change_timer < 0)
 377                 wield_position.Y -= 40 + m_wield_change_timer*320;
 378         else
 379                 wield_position.Y -= 40 - m_wield_change_timer*320;
 380         if(m_digging_anim < 0.05 || m_digging_anim > 0.5){
 381                 f32 frac = 1.0;
 382                 if(m_digging_anim > 0.5)
 383                         frac = 2.0 * (m_digging_anim - 0.5);
 384                 // This value starts from 1 and settles to 0
 385                 f32 ratiothing = pow((1.0f - tool_reload_ratio), 0.5f);
 386                 //f32 ratiothing2 = pow(ratiothing, 0.5f);
 387                 f32 ratiothing2 = (easeCurve(ratiothing*0.5))*2.0;
 388                 wield_position.Y -= frac * 25.0 * pow(ratiothing2, 1.7f);
 389                 //wield_position.Z += frac * 5.0 * ratiothing2;
 390                 wield_position.X -= frac * 35.0 * pow(ratiothing2, 1.1f);
 391                 wield_rotation.Y += frac * 70.0 * pow(ratiothing2, 1.4f);
 392                 //wield_rotation.X -= frac * 15.0 * pow(ratiothing2, 1.4f);
 393                 //wield_rotation.Z += frac * 15.0 * pow(ratiothing2, 1.0f);
 394         }
 395         if (m_digging_button != -1)
 396         {
 397                 f32 digfrac = m_digging_anim;
 398                 wield_position.X -= 50 * sin(pow(digfrac, 0.8f) * M_PI);
 399                 wield_position.Y += 24 * sin(digfrac * 1.8 * M_PI);
 400                 wield_position.Z += 25 * 0.5;
 401
 402                 // Euler angles are PURE EVIL, so why not use quaternions?
 403                 core::quaternion quat_begin(wield_rotation * core::DEGTORAD);
 404                 core::quaternion quat_end(v3f(80, 30, 100) * core::DEGTORAD);
 405                 core::quaternion quat_slerp;
 406                 quat_slerp.slerp(quat_begin, quat_end, sin(digfrac * M_PI));
 407                 quat_slerp.toEuler(wield_rotation);
 408                 wield_rotation *= core::RADTODEG;
 409         }
 410         else {
 411                 f32 bobfrac = my_modf(m_view_bobbing_anim);
 412                 wield_position.X -= sin(bobfrac*M_PI*2.0) * 3.0;
 413                 wield_position.Y += sin(my_modf(bobfrac*2.0)*M_PI) * 3.0;
 414         }
 415         m_wieldnode->setPosition(wield_position);
 416         m_wieldnode->setRotation(wield_rotation);
 417         m_wieldlight = player->light;
 418
 419         // Render distance feedback loop
 420         updateViewingRange(frametime, busytime);
 421
 422         // If the player seems to be walking on solid ground,
 423         // view bobbing is enabled and free_move is off,
 424         // start (or continue) the view bobbing animation.
 425         v3f speed = player->getSpeed();
 426         if ((hypot(speed.X, speed.Z) > BS) &&
 427                 (player->touching_ground) &&
 428                 (g_settings->getBool("view_bobbing") == true) &&
 429                 (g_settings->getBool("free_move") == false ||
 430                                 !m_gamedef->checkLocalPrivilege("fly")))
 431         {
 432                 // Start animation
 433                 m_view_bobbing_state = 1;
 434                 m_view_bobbing_speed = MYMIN(speed.getLength(), 40);
 435         }
 436         else if (m_view_bobbing_state == 1)
 437         {
 438                 // Stop animation
 439                 m_view_bobbing_state = 2;
 440                 m_view_bobbing_speed = 60;
 441         }
 442 }
 443
 444 void Camera::updateViewingRange(f32 frametime_in, f32 busytime_in)
 445 {
 446         if (m_draw_control.range_all)
 447                 return;
 448
 449         m_added_busytime += busytime_in;
 450         m_added_frames += 1;
 451
 452         m_frametime_counter -= frametime_in;
 453         if (m_frametime_counter > 0)
 454                 return;
 455         m_frametime_counter = 0.2; // Same as ClientMap::updateDrawList interval
 456
 457         /*dstream<<__FUNCTION_NAME
 458                         <<": Collected "<<m_added_frames<<" frames, total of "
 459                         <<m_added_busytime<<"s."<<std::endl;
 460
 461         dstream<<"m_draw_control.blocks_drawn="
 462                         <<m_draw_control.blocks_drawn
 463                         <<", m_draw_control.blocks_would_have_drawn="
 464                         <<m_draw_control.blocks_would_have_drawn
 465                         <<std::endl;*/
 466
 467         // Get current viewing range and FPS settings
 468         f32 viewing_range_min = g_settings->getS16("viewing_range_nodes_min");
 469         viewing_range_min = MYMAX(15.0, viewing_range_min);
 470
 471         f32 viewing_range_max = g_settings->getS16("viewing_range_nodes_max");
 472         viewing_range_max = MYMAX(viewing_range_min, viewing_range_max);
 473
 474         // Immediately apply hard limits
 475         if(m_draw_control.wanted_range < viewing_range_min)
 476                 m_draw_control.wanted_range = viewing_range_min;
 477         if(m_draw_control.wanted_range > viewing_range_max)
 478                 m_draw_control.wanted_range = viewing_range_max;
 479
 480         // Just so big a value that everything rendered is visible
 481         // Some more allowance than viewing_range_max * BS because of clouds,
 482         // active objects, etc.
 483         if(viewing_range_max < 200*BS)
 484                 m_cameranode->setFarValue(200 * BS * 10);
 485         else
 486                 m_cameranode->setFarValue(viewing_range_max * BS * 10);
 487
 488         f32 wanted_fps = g_settings->getFloat("wanted_fps");
 489         wanted_fps = MYMAX(wanted_fps, 1.0);
 490         f32 wanted_frametime = 1.0 / wanted_fps;
 491
 492         m_draw_control.wanted_min_range = viewing_range_min;
 493         m_draw_control.wanted_max_blocks = (2.0*m_draw_control.blocks_would_have_drawn)+1;
 494         if (m_draw_control.wanted_max_blocks < 10)
 495                 m_draw_control.wanted_max_blocks = 10;
 496
 497         f32 block_draw_ratio = 1.0;
 498         if (m_draw_control.blocks_would_have_drawn != 0)
 499         {
 500                 block_draw_ratio = (f32)m_draw_control.blocks_drawn
 501                         / (f32)m_draw_control.blocks_would_have_drawn;
 502         }
 503
 504         // Calculate the average frametime in the case that all wanted
 505         // blocks had been drawn
 506         f32 frametime = m_added_busytime / m_added_frames / block_draw_ratio;
 507
 508         m_added_busytime = 0.0;
 509         m_added_frames = 0;
 510
 511         f32 wanted_frametime_change = wanted_frametime - frametime;
 512         //dstream<<"wanted_frametime_change="<<wanted_frametime_change<<std::endl;
 513         g_profiler->avg("wanted_frametime_change", wanted_frametime_change);
 514
 515         // If needed frametime change is small, just return
 516         // This value was 0.4 for many months until 2011-10-18 by c55;
 517         if (fabs(wanted_frametime_change) < wanted_frametime*0.33)
 518         {
 519                 //dstream<<"ignoring small wanted_frametime_change"<<std::endl;
 520                 return;
 521         }
 522
 523         f32 range = m_draw_control.wanted_range;
 524         f32 new_range = range;
 525
 526         f32 d_range = range - m_range_old;
 527         f32 d_busytime = busytime_in - m_busytime_old;
 528         if (d_range != 0)
 529         {
 530                 m_time_per_range = d_busytime / d_range;
 531         }
 532         //dstream<<"time_per_range="<<m_time_per_range<<std::endl;
 533         g_profiler->avg("time_per_range", m_time_per_range);
 534
 535         // The minimum allowed calculated frametime-range derivative:
 536         // Practically this sets the maximum speed of changing the range.
 537         // The lower this value, the higher the maximum changing speed.
 538         // A low value here results in wobbly range (0.001)
 539         // A low value can cause oscillation in very nonlinear time/range curves.
 540         // A high value here results in slow changing range (0.0025)
 541         // SUGG: This could be dynamically adjusted so that when
 542         //       the camera is turning, this is lower
 543         //f32 min_time_per_range = 0.0010; // Up to 0.4.7
 544         f32 min_time_per_range = 0.0005;
 545         if(m_time_per_range < min_time_per_range)
 546         {
 547                 m_time_per_range = min_time_per_range;
 548                 //dstream<<"m_time_per_range="<<m_time_per_range<<" (min)"<<std::endl;
 549         }
 550         else
 551         {
 552                 //dstream<<"m_time_per_range="<<m_time_per_range<<std::endl;
 553         }
 554
 555         f32 wanted_range_change = wanted_frametime_change / m_time_per_range;
 556         // Dampen the change a bit to kill oscillations
 557         //wanted_range_change *= 0.9;
 558         //wanted_range_change *= 0.75;
 559         wanted_range_change *= 0.5;
 560         //dstream<<"wanted_range_change="<<wanted_range_change<<std::endl;
 561
 562         // If needed range change is very small, just return
 563         if(fabs(wanted_range_change) < 0.001)
 564         {
 565                 //dstream<<"ignoring small wanted_range_change"<<std::endl;
 566                 return;
 567         }
 568
 569         new_range += wanted_range_change;
 570
 571         //f32 new_range_unclamped = new_range;
 572         new_range = MYMAX(new_range, viewing_range_min);
 573         new_range = MYMIN(new_range, viewing_range_max);
 574         /*dstream<<"new_range="<<new_range_unclamped
 575                         <<", clamped to "<<new_range<<std::endl;*/
 576
 577         m_range_old = m_draw_control.wanted_range;
 578         m_busytime_old = busytime_in;
 579
 580         m_draw_control.wanted_range = new_range;
 581 }
 582
 583 void Camera::setDigging(s32 button)
 584 {
 585         if (m_digging_button == -1)
 586                 m_digging_button = button;
 587 }
 588
 589 void Camera::wield(const ItemStack &item, u16 playeritem)
 590 {
 591         IItemDefManager *idef = m_gamedef->idef();
 592         std::string itemname = item.getDefinition(idef).name;
 593         m_wield_mesh_next = idef->getWieldMesh(itemname, m_gamedef);
 594         if(playeritem != m_previous_playeritem &&
 595                         !(m_previous_itemname == "" && itemname == "")) {
 596                 m_previous_playeritem = playeritem;
 597                 m_previous_itemname = itemname;
 598                 if(m_wield_change_timer >= 0.125)
 599                         m_wield_change_timer = -0.125;
 600                 else if(m_wield_change_timer > 0) {
 601                         m_wield_change_timer = -m_wield_change_timer;
 602                 }
 603         } else {
 604                 if(m_wield_mesh_next) {
 605                         m_wieldnode->setMesh(m_wield_mesh_next);
 606                         m_wieldnode->setVisible(true);
 607                 } else {
 608                         m_wieldnode->setVisible(false);
 609                 }
 610                 m_wield_mesh_next = NULL;
 611                 if(m_previous_itemname != itemname) {
 612                         m_previous_itemname = itemname;
 613                         m_wield_change_timer = 0;
 614                 }
 615                 else
 616                         m_wield_change_timer = 0.125;
 617         }
 618 }
 619
 620 void Camera::drawWieldedTool()
 621 {
 622         // Set vertex colors of wield mesh according to light level
 623         u8 li = m_wieldlight;
 624         video::SColor color(255,li,li,li);
 625         setMeshColor(m_wieldnode->getMesh(), color);
 626
 627         // Clear Z buffer
 628         m_wieldmgr->getVideoDriver()->clearZBuffer();
 629
 630         // Draw the wielded node (in a separate scene manager)
 631         scene::ICameraSceneNode* cam = m_wieldmgr->getActiveCamera();
 632         cam->setAspectRatio(m_cameranode->getAspectRatio());
 633         cam->setFOV(72.0*M_PI/180.0);
 634         cam->setNearValue(0.1);
 635         cam->setFarValue(100);
 636         m_wieldmgr->drawAll();
 637 }