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 "util/numeric.h"
  37 #include "util/mathconstants.h"
  38
  39 Camera::Camera(scene::ISceneManager* smgr, MapDrawControl& draw_control,
  40                 IGameDef *gamedef):
  41         m_smgr(smgr),
  42         m_playernode(NULL),
  43         m_headnode(NULL),
  44         m_cameranode(NULL),
  45
  46         m_wieldmgr(NULL),
  47         m_wieldnode(NULL),
  48         m_wieldlight(0),
  49
  50         m_draw_control(draw_control),
  51         m_gamedef(gamedef),
  52
  53         m_camera_position(0,0,0),
  54         m_camera_direction(0,0,0),
  55
  56         m_aspect(1.0),
  57         m_fov_x(1.0),
  58         m_fov_y(1.0),
  59
  60         m_added_frametime(0),
  61         m_added_frames(0),
  62         m_range_old(0),
  63         m_frametime_old(0),
  64         m_frametime_counter(0),
  65         m_time_per_range(30. / 50), // a sane default of 30ms per 50 nodes of range
  66
  67         m_view_bobbing_anim(0),
  68         m_view_bobbing_state(0),
  69         m_view_bobbing_speed(0),
  70         m_view_bobbing_fall(0),
  71
  72         m_digging_anim(0),
  73         m_digging_button(-1),
  74         m_dummymesh(createCubeMesh(v3f(1,1,1))),
  75
  76         m_wield_change_timer(0.125),
  77         m_wield_mesh_next(NULL),
  78         m_previous_playeritem(-1),
  79         m_previous_itemname("")
  80 {
  81         //dstream<<__FUNCTION_NAME<<std::endl;
  82
  83         // note: making the camera node a child of the player node
  84         // would lead to unexpected behaviour, so we don't do that.
  85         m_playernode = smgr->addEmptySceneNode(smgr->getRootSceneNode());
  86         m_headnode = smgr->addEmptySceneNode(m_playernode);
  87         m_cameranode = smgr->addCameraSceneNode(smgr->getRootSceneNode());
  88         m_cameranode->bindTargetAndRotation(true);
  89
  90         // This needs to be in its own scene manager. It is drawn after
  91         // all other 3D scene nodes and before the GUI.
  92         m_wieldmgr = smgr->createNewSceneManager();
  93         m_wieldmgr->addCameraSceneNode();
  94         m_wieldnode = m_wieldmgr->addMeshSceneNode(m_dummymesh, NULL);  // need a dummy mesh
  95 }
  96
  97 Camera::~Camera()
  98 {
  99         m_wieldmgr->drop();
 100
 101         delete m_dummymesh;
 102 }
 103
 104 bool Camera::successfullyCreated(std::wstring& error_message)
 105 {
 106         if (m_playernode == NULL)
 107         {
 108                 error_message = L"Failed to create the player scene node";
 109                 return false;
 110         }
 111         if (m_headnode == NULL)
 112         {
 113                 error_message = L"Failed to create the head scene node";
 114                 return false;
 115         }
 116         if (m_cameranode == NULL)
 117         {
 118                 error_message = L"Failed to create the camera scene node";
 119                 return false;
 120         }
 121         if (m_wieldmgr == NULL)
 122         {
 123                 error_message = L"Failed to create the wielded item scene manager";
 124                 return false;
 125         }
 126         if (m_wieldnode == NULL)
 127         {
 128                 error_message = L"Failed to create the wielded item scene node";
 129                 return false;
 130         }
 131         return true;
 132 }
 133
 134 // Returns the fractional part of x
 135 inline f32 my_modf(f32 x)
 136 {
 137         double dummy;
 138         return modf(x, &dummy);
 139 }
 140
 141 void Camera::step(f32 dtime)
 142 {
 143         if(m_view_bobbing_fall > 0)
 144         {
 145                 m_view_bobbing_fall -= 3 * dtime;
 146                 if(m_view_bobbing_fall <= 0)
 147                         m_view_bobbing_fall = -1; // Mark the effect as finished
 148         }
 149
 150         bool was_under_zero = m_wield_change_timer < 0;
 151         if(m_wield_change_timer < 0.125)
 152                 m_wield_change_timer += dtime;
 153         if(m_wield_change_timer > 0.125)
 154                 m_wield_change_timer = 0.125;
 155
 156         if(m_wield_change_timer >= 0 && was_under_zero) {
 157                 if(m_wield_mesh_next) {
 158                         m_wieldnode->setMesh(m_wield_mesh_next);
 159                         m_wieldnode->setVisible(true);
 160                 } else {
 161                         m_wieldnode->setVisible(false);
 162                 }
 163                 m_wield_mesh_next = NULL;
 164         }
 165
 166         if (m_view_bobbing_state != 0)
 167         {
 168                 //f32 offset = dtime * m_view_bobbing_speed * 0.035;
 169                 f32 offset = dtime * m_view_bobbing_speed * 0.030;
 170                 if (m_view_bobbing_state == 2)
 171                 {
 172 #if 0
 173                         // Animation is getting turned off
 174                         if (m_view_bobbing_anim < 0.5)
 175                                 m_view_bobbing_anim -= offset;
 176                         else
 177                                 m_view_bobbing_anim += offset;
 178                         if (m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1)
 179                         {
 180                                 m_view_bobbing_anim = 0;
 181                                 m_view_bobbing_state = 0;
 182                         }
 183 #endif
 184 #if 1
 185                         // Animation is getting turned off
 186                         if(m_view_bobbing_anim < 0.25){
 187                                 m_view_bobbing_anim -= offset;
 188                         } else if(m_view_bobbing_anim > 0.75){
 189                                 m_view_bobbing_anim += offset;
 190                         } if(m_view_bobbing_anim < 0.5){
 191                                 m_view_bobbing_anim += offset;
 192                                 if(m_view_bobbing_anim > 0.5)
 193                                         m_view_bobbing_anim = 0.5;
 194                         } else {
 195                                 m_view_bobbing_anim -= offset;
 196                                 if(m_view_bobbing_anim < 0.5)
 197                                         m_view_bobbing_anim = 0.5;
 198                         }
 199                         if(m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1 ||
 200                                         fabs(m_view_bobbing_anim - 0.5) < 0.01)
 201                         {
 202                                 m_view_bobbing_anim = 0;
 203                                 m_view_bobbing_state = 0;
 204                         }
 205 #endif
 206                 }
 207                 else
 208                 {
 209                         float was = m_view_bobbing_anim;
 210                         m_view_bobbing_anim = my_modf(m_view_bobbing_anim + offset);
 211                         bool step = (was == 0 ||
 212                                         (was < 0.5f && m_view_bobbing_anim >= 0.5f) ||
 213                                         (was > 0.5f && m_view_bobbing_anim <= 0.5f));
 214                         if(step){
 215                                 MtEvent *e = new SimpleTriggerEvent("ViewBobbingStep");
 216                                 m_gamedef->event()->put(e);
 217                         }
 218                 }
 219         }
 220
 221         if (m_digging_button != -1)
 222         {
 223                 f32 offset = dtime * 3.5;
 224                 float m_digging_anim_was = m_digging_anim;
 225                 m_digging_anim += offset;
 226                 if (m_digging_anim >= 1)
 227                 {
 228                         m_digging_anim = 0;
 229                         m_digging_button = -1;
 230                 }
 231                 float lim = 0.15;
 232                 if(m_digging_anim_was < lim && m_digging_anim >= lim)
 233                 {
 234                         if(m_digging_button == 0){
 235                                 MtEvent *e = new SimpleTriggerEvent("CameraPunchLeft");
 236                                 m_gamedef->event()->put(e);
 237                         } else if(m_digging_button == 1){
 238                                 MtEvent *e = new SimpleTriggerEvent("CameraPunchRight");
 239                                 m_gamedef->event()->put(e);
 240                         }
 241                 }
 242         }
 243 }
 244
 245 void Camera::update(LocalPlayer* player, f32 frametime, v2u32 screensize,
 246                 f32 tool_reload_ratio)
 247 {
 248         // Get player position
 249         // Smooth the movement when walking up stairs
 250         v3f old_player_position = m_playernode->getPosition();
 251         v3f player_position = player->getPosition();
 252         if (player->isAttached && player->parent)
 253                 player_position = player->parent->getPosition();
 254         //if(player->touching_ground && player_position.Y > old_player_position.Y)
 255         if(player->touching_ground &&
 256                         player_position.Y > old_player_position.Y)
 257         {
 258                 f32 oldy = old_player_position.Y;
 259                 f32 newy = player_position.Y;
 260                 f32 t = exp(-23*frametime);
 261                 player_position.Y = oldy * t + newy * (1-t);
 262         }
 263
 264         // Set player node transformation
 265         m_playernode->setPosition(player_position);
 266         m_playernode->setRotation(v3f(0, -1 * player->getYaw(), 0));
 267         m_playernode->updateAbsolutePosition();
 268
 269         // Get camera tilt timer (hurt animation)
 270         float cameratilt = fabs(fabs(player->hurt_tilt_timer-0.75)-0.75);
 271
 272         // Fall bobbing animation
 273         float fall_bobbing = 0;
 274         if(player->camera_impact >= 1)
 275         {
 276                 if(m_view_bobbing_fall == -1) // Effect took place and has finished
 277                         player->camera_impact = m_view_bobbing_fall = 0;
 278                 else if(m_view_bobbing_fall == 0) // Initialize effect
 279                         m_view_bobbing_fall = 1;
 280
 281                 // Convert 0 -> 1 to 0 -> 1 -> 0
 282                 fall_bobbing = m_view_bobbing_fall < 0.5 ? m_view_bobbing_fall * 2 : -(m_view_bobbing_fall - 0.5) * 2 + 1;
 283                 // Smoothen and invert the above
 284                 fall_bobbing = sin(fall_bobbing * 0.5 * M_PI) * -1;
 285                 // Amplify according to the intensity of the impact
 286                 fall_bobbing *= (1 - rangelim(50 / player->camera_impact, 0, 1)) * 5;
 287
 288                 fall_bobbing *= g_settings->getFloat("fall_bobbing_amount");
 289         }
 290
 291         // Set head node transformation
 292         m_headnode->setPosition(player->getEyeOffset()+v3f(0,cameratilt*-player->hurt_tilt_strength+fall_bobbing,0));
 293         m_headnode->setRotation(v3f(player->getPitch(), 0, cameratilt*player->hurt_tilt_strength));
 294         m_headnode->updateAbsolutePosition();
 295
 296         // Compute relative camera position and target
 297         v3f rel_cam_pos = v3f(0,0,0);
 298         v3f rel_cam_target = v3f(0,0,1);
 299         v3f rel_cam_up = v3f(0,1,0);
 300
 301         if (m_view_bobbing_anim != 0)
 302         {
 303                 f32 bobfrac = my_modf(m_view_bobbing_anim * 2);
 304                 f32 bobdir = (m_view_bobbing_anim < 0.5) ? 1.0 : -1.0;
 305
 306                 #if 1
 307                 f32 bobknob = 1.2;
 308                 f32 bobtmp = sin(pow(bobfrac, bobknob) * M_PI);
 309                 //f32 bobtmp2 = cos(pow(bobfrac, bobknob) * M_PI);
 310
 311                 v3f bobvec = v3f(
 312                         0.3 * bobdir * sin(bobfrac * M_PI),
 313                         -0.28 * bobtmp * bobtmp,
 314                         0.);
 315
 316                 //rel_cam_pos += 0.2 * bobvec;
 317                 //rel_cam_target += 0.03 * bobvec;
 318                 //rel_cam_up.rotateXYBy(0.02 * bobdir * bobtmp * M_PI);
 319                 float f = 1.0;
 320                 f *= g_settings->getFloat("view_bobbing_amount");
 321                 rel_cam_pos += bobvec * f;
 322                 //rel_cam_target += 0.995 * bobvec * f;
 323                 rel_cam_target += bobvec * f;
 324                 rel_cam_target.Z -= 0.005 * bobvec.Z * f;
 325                 //rel_cam_target.X -= 0.005 * bobvec.X * f;
 326                 //rel_cam_target.Y -= 0.005 * bobvec.Y * f;
 327                 rel_cam_up.rotateXYBy(-0.03 * bobdir * bobtmp * M_PI * f);
 328                 #else
 329                 f32 angle_deg = 1 * bobdir * sin(bobfrac * M_PI);
 330                 f32 angle_rad = angle_deg * M_PI / 180;
 331                 f32 r = 0.05;
 332                 v3f off = v3f(
 333                         r * sin(angle_rad),
 334                         r * (cos(angle_rad) - 1),
 335                         0);
 336                 rel_cam_pos += off;
 337                 //rel_cam_target += off;
 338                 rel_cam_up.rotateXYBy(angle_deg);
 339                 #endif
 340
 341         }
 342
 343         // Compute absolute camera position and target
 344         m_headnode->getAbsoluteTransformation().transformVect(m_camera_position, rel_cam_pos);
 345         m_headnode->getAbsoluteTransformation().rotateVect(m_camera_direction, rel_cam_target - rel_cam_pos);
 346
 347         v3f abs_cam_up;
 348         m_headnode->getAbsoluteTransformation().rotateVect(abs_cam_up, rel_cam_up);
 349
 350         // Set camera node transformation
 351         m_cameranode->setPosition(m_camera_position);
 352         m_cameranode->setUpVector(abs_cam_up);
 353         // *100.0 helps in large map coordinates
 354         m_cameranode->setTarget(m_camera_position + 100 * m_camera_direction);
 355
 356         // Get FOV setting
 357         f32 fov_degrees = g_settings->getFloat("fov");
 358         fov_degrees = MYMAX(fov_degrees, 10.0);
 359         fov_degrees = MYMIN(fov_degrees, 170.0);
 360
 361         // FOV and aspect ratio
 362         m_aspect = (f32)screensize.X / (f32) screensize.Y;
 363         m_fov_y = fov_degrees * M_PI / 180.0;
 364         // Increase vertical FOV on lower aspect ratios (<16:10)
 365         m_fov_y *= MYMAX(1.0, MYMIN(1.4, sqrt(16./10. / m_aspect)));
 366         m_fov_x = 2 * atan(m_aspect * tan(0.5 * m_fov_y));
 367         m_cameranode->setAspectRatio(m_aspect);
 368         m_cameranode->setFOV(m_fov_y);
 369
 370         // Position the wielded item
 371         //v3f wield_position = v3f(45, -35, 65);
 372         v3f wield_position = v3f(55, -35, 65);
 373         //v3f wield_rotation = v3f(-100, 120, -100);
 374         v3f wield_rotation = v3f(-100, 120, -100);
 375         if(m_wield_change_timer < 0)
 376                 wield_position.Y -= 40 + m_wield_change_timer*320;
 377         else
 378                 wield_position.Y -= 40 - m_wield_change_timer*320;
 379         if(m_digging_anim < 0.05 || m_digging_anim > 0.5){
 380                 f32 frac = 1.0;
 381                 if(m_digging_anim > 0.5)
 382                         frac = 2.0 * (m_digging_anim - 0.5);
 383                 // This value starts from 1 and settles to 0
 384                 f32 ratiothing = pow((1.0f - tool_reload_ratio), 0.5f);
 385                 //f32 ratiothing2 = pow(ratiothing, 0.5f);
 386                 f32 ratiothing2 = (easeCurve(ratiothing*0.5))*2.0;
 387                 wield_position.Y -= frac * 25.0 * pow(ratiothing2, 1.7f);
 388                 //wield_position.Z += frac * 5.0 * ratiothing2;
 389                 wield_position.X -= frac * 35.0 * pow(ratiothing2, 1.1f);
 390                 wield_rotation.Y += frac * 70.0 * pow(ratiothing2, 1.4f);
 391                 //wield_rotation.X -= frac * 15.0 * pow(ratiothing2, 1.4f);
 392                 //wield_rotation.Z += frac * 15.0 * pow(ratiothing2, 1.0f);
 393         }
 394         if (m_digging_button != -1)
 395         {
 396                 f32 digfrac = m_digging_anim;
 397                 wield_position.X -= 50 * sin(pow(digfrac, 0.8f) * M_PI);
 398                 wield_position.Y += 24 * sin(digfrac * 1.8 * M_PI);
 399                 wield_position.Z += 25 * 0.5;
 400
 401                 // Euler angles are PURE EVIL, so why not use quaternions?
 402                 core::quaternion quat_begin(wield_rotation * core::DEGTORAD);
 403                 core::quaternion quat_end(v3f(80, 30, 100) * core::DEGTORAD);
 404                 core::quaternion quat_slerp;
 405                 quat_slerp.slerp(quat_begin, quat_end, sin(digfrac * M_PI));
 406                 quat_slerp.toEuler(wield_rotation);
 407                 wield_rotation *= core::RADTODEG;
 408         }
 409         else {
 410                 f32 bobfrac = my_modf(m_view_bobbing_anim);
 411                 wield_position.X -= sin(bobfrac*M_PI*2.0) * 3.0;
 412                 wield_position.Y += sin(my_modf(bobfrac*2.0)*M_PI) * 3.0;
 413         }
 414         m_wieldnode->setPosition(wield_position);
 415         m_wieldnode->setRotation(wield_rotation);
 416         m_wieldlight = player->light;
 417
 418         // Render distance feedback loop
 419         updateViewingRange(frametime);
 420
 421         // If the player seems to be walking on solid ground,
 422         // view bobbing is enabled and free_move is off,
 423         // start (or continue) the view bobbing animation.
 424         v3f speed = player->getSpeed();
 425         if ((hypot(speed.X, speed.Z) > BS) &&
 426                 (player->touching_ground) &&
 427                 (g_settings->getBool("view_bobbing") == true) &&
 428                 (g_settings->getBool("free_move") == false ||
 429                                 !m_gamedef->checkLocalPrivilege("fly")))
 430         {
 431                 // Start animation
 432                 m_view_bobbing_state = 1;
 433                 m_view_bobbing_speed = MYMIN(speed.getLength(), 40);
 434         }
 435         else if (m_view_bobbing_state == 1)
 436         {
 437                 // Stop animation
 438                 m_view_bobbing_state = 2;
 439                 m_view_bobbing_speed = 60;
 440         }
 441 }
 442
 443 void Camera::updateViewingRange(f32 frametime_in)
 444 {
 445         if (m_draw_control.range_all)
 446                 return;
 447
 448         m_added_frametime += frametime_in;
 449         m_added_frames += 1;
 450
 451         // Actually this counter kind of sucks because frametime is busytime
 452         m_frametime_counter -= frametime_in;
 453         if (m_frametime_counter > 0)
 454                 return;
 455         m_frametime_counter = 0.2;
 456
 457         /*dstream<<__FUNCTION_NAME
 458                         <<": Collected "<<m_added_frames<<" frames, total of "
 459                         <<m_added_frametime<<"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(5.0, 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_frametime / m_added_frames / block_draw_ratio;
 507
 508         m_added_frametime = 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
 514         // If needed frametime change is small, just return
 515         // This value was 0.4 for many months until 2011-10-18 by c55;
 516         // Let's see how this works out.
 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_frametime = frametime - m_frametime_old;
 528         if (d_range != 0)
 529         {
 530                 m_time_per_range = d_frametime / d_range;
 531         }
 532
 533         // The minimum allowed calculated frametime-range derivative:
 534         // Practically this sets the maximum speed of changing the range.
 535         // The lower this value, the higher the maximum changing speed.
 536         // A low value here results in wobbly range (0.001)
 537         // A high value here results in slow changing range (0.0025)
 538         // SUGG: This could be dynamically adjusted so that when
 539         //       the camera is turning, this is lower
 540         //f32 min_time_per_range = 0.0015;
 541         f32 min_time_per_range = 0.0010;
 542         //f32 min_time_per_range = 0.05 / range;
 543         if(m_time_per_range < min_time_per_range)
 544         {
 545                 m_time_per_range = min_time_per_range;
 546                 //dstream<<"m_time_per_range="<<m_time_per_range<<" (min)"<<std::endl;
 547         }
 548         else
 549         {
 550                 //dstream<<"m_time_per_range="<<m_time_per_range<<std::endl;
 551         }
 552
 553         f32 wanted_range_change = wanted_frametime_change / m_time_per_range;
 554         // Dampen the change a bit to kill oscillations
 555         //wanted_range_change *= 0.9;
 556         //wanted_range_change *= 0.75;
 557         wanted_range_change *= 0.5;
 558         //dstream<<"wanted_range_change="<<wanted_range_change<<std::endl;
 559
 560         // If needed range change is very small, just return
 561         if(fabs(wanted_range_change) < 0.001)
 562         {
 563                 //dstream<<"ignoring small wanted_range_change"<<std::endl;
 564                 return;
 565         }
 566
 567         new_range += wanted_range_change;
 568
 569         //f32 new_range_unclamped = new_range;
 570         new_range = MYMAX(new_range, viewing_range_min);
 571         new_range = MYMIN(new_range, viewing_range_max);
 572         /*dstream<<"new_range="<<new_range_unclamped
 573                         <<", clamped to "<<new_range<<std::endl;*/
 574
 575         m_draw_control.wanted_range = new_range;
 576
 577         m_range_old = new_range;
 578         m_frametime_old = frametime;
 579 }
 580
 581 void Camera::setDigging(s32 button)
 582 {
 583         if (m_digging_button == -1)
 584                 m_digging_button = button;
 585 }
 586
 587 void Camera::wield(const ItemStack &item, u16 playeritem)
 588 {
 589         IItemDefManager *idef = m_gamedef->idef();
 590         std::string itemname = item.getDefinition(idef).name;
 591         m_wield_mesh_next = idef->getWieldMesh(itemname, m_gamedef);
 592         if(playeritem != m_previous_playeritem &&
 593                         !(m_previous_itemname == "" && itemname == "")) {
 594                 m_previous_playeritem = playeritem;
 595                 m_previous_itemname = itemname;
 596                 if(m_wield_change_timer >= 0.125)
 597                         m_wield_change_timer = -0.125;
 598                 else if(m_wield_change_timer > 0) {
 599                         m_wield_change_timer = -m_wield_change_timer;
 600                 }
 601         } else {
 602                 if(m_wield_mesh_next) {
 603                         m_wieldnode->setMesh(m_wield_mesh_next);
 604                         m_wieldnode->setVisible(true);
 605                 } else {
 606                         m_wieldnode->setVisible(false);
 607                 }
 608                 m_wield_mesh_next = NULL;
 609                 if(m_previous_itemname != itemname) {
 610                         m_previous_itemname = itemname;
 611                         m_wield_change_timer = 0;
 612                 }
 613                 else
 614                         m_wield_change_timer = 0.125;
 615         }
 616 }
 617
 618 void Camera::drawWieldedTool()
 619 {
 620         // Set vertex colors of wield mesh according to light level
 621         u8 li = m_wieldlight;
 622         video::SColor color(255,li,li,li);
 623         setMeshColor(m_wieldnode->getMesh(), color);
 624
 625         // Clear Z buffer
 626         m_wieldmgr->getVideoDriver()->clearZBuffer();
 627
 628         // Draw the wielded node (in a separate scene manager)
 629         scene::ICameraSceneNode* cam = m_wieldmgr->getActiveCamera();
 630         cam->setAspectRatio(m_cameranode->getAspectRatio());
 631         cam->setFOV(72.0*M_PI/180.0);
 632         cam->setNearValue(0.1);
 633         cam->setFarValue(100);
 634         m_wieldmgr->drawAll();
 635 }