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 "map.h"
  24 #include "clientmap.h"     // MapDrawControl
  25 #include "player.h"
  26 #include <cmath>
  27 #include "settings.h"
  28 #include "wieldmesh.h"
  29 #include "noise.h"         // easeCurve
  30 #include "sound.h"
  31 #include "event.h"
  32 #include "profiler.h"
  33 #include "util/numeric.h"
  34 #include "constants.h"
  35 #include "fontengine.h"
  36 #include "script/scripting_client.h"
  37
  38 #define CAMERA_OFFSET_STEP 200
  39
  40 #include "nodedef.h"
  41
  42 Camera::Camera(scene::ISceneManager* smgr, MapDrawControl& draw_control,
  43                 Client *client):
  44         m_draw_control(draw_control),
  45         m_client(client)
  46 {
  47         //dstream<<FUNCTION_NAME<<std::endl;
  48
  49         m_driver = smgr->getVideoDriver();
  50         // note: making the camera node a child of the player node
  51         // would lead to unexpected behaviour, so we don't do that.
  52         m_playernode = smgr->addEmptySceneNode(smgr->getRootSceneNode());
  53         m_headnode = smgr->addEmptySceneNode(m_playernode);
  54         m_cameranode = smgr->addCameraSceneNode(smgr->getRootSceneNode());
  55         m_cameranode->bindTargetAndRotation(true);
  56
  57         // This needs to be in its own scene manager. It is drawn after
  58         // all other 3D scene nodes and before the GUI.
  59         m_wieldmgr = smgr->createNewSceneManager();
  60         m_wieldmgr->addCameraSceneNode();
  61         m_wieldnode = new WieldMeshSceneNode(m_wieldmgr->getRootSceneNode(), m_wieldmgr, -1, false);
  62         m_wieldnode->setItem(ItemStack(), m_client);
  63         m_wieldnode->drop(); // m_wieldmgr grabbed it
  64
  65         /* TODO: Add a callback function so these can be updated when a setting
  66          *       changes.  At this point in time it doesn't matter (e.g. /set
  67          *       is documented to change server settings only)
  68          *
  69          * TODO: Local caching of settings is not optimal and should at some stage
  70          *       be updated to use a global settings object for getting thse values
  71          *       (as opposed to the this local caching). This can be addressed in
  72          *       a later release.
  73          */
  74         m_cache_fall_bobbing_amount = g_settings->getFloat("fall_bobbing_amount");
  75         m_cache_view_bobbing_amount = g_settings->getFloat("view_bobbing_amount");
  76         m_cache_fov                 = g_settings->getFloat("fov");
  77         m_cache_zoom_fov            = g_settings->getFloat("zoom_fov");
  78         m_arm_inertia               = g_settings->getBool("arm_inertia");
  79         m_nametags.clear();
  80 }
  81
  82 Camera::~Camera()
  83 {
  84         m_wieldmgr->drop();
  85 }
  86
  87 bool Camera::successfullyCreated(std::string &error_message)
  88 {
  89         if (!m_playernode) {
  90                 error_message = "Failed to create the player scene node";
  91         } else if (!m_headnode) {
  92                 error_message = "Failed to create the head scene node";
  93         } else if (!m_cameranode) {
  94                 error_message = "Failed to create the camera scene node";
  95         } else if (!m_wieldmgr) {
  96                 error_message = "Failed to create the wielded item scene manager";
  97         } else if (!m_wieldnode) {
  98                 error_message = "Failed to create the wielded item scene node";
  99         } else {
 100                 error_message.clear();
 101         }
 102
 103         if (g_settings->getBool("enable_client_modding")) {
 104                 m_client->getScript()->on_camera_ready(this);
 105         }
 106         return error_message.empty();
 107 }
 108
 109 // Returns the fractional part of x
 110 inline f32 my_modf(f32 x)
 111 {
 112         double dummy;
 113         return modf(x, &dummy);
 114 }
 115
 116 void Camera::step(f32 dtime)
 117 {
 118         if(m_view_bobbing_fall > 0)
 119         {
 120                 m_view_bobbing_fall -= 3 * dtime;
 121                 if(m_view_bobbing_fall <= 0)
 122                         m_view_bobbing_fall = -1; // Mark the effect as finished
 123         }
 124
 125         bool was_under_zero = m_wield_change_timer < 0;
 126         m_wield_change_timer = MYMIN(m_wield_change_timer + dtime, 0.125);
 127
 128         if (m_wield_change_timer >= 0 && was_under_zero)
 129                 m_wieldnode->setItem(m_wield_item_next, m_client);
 130
 131         if (m_view_bobbing_state != 0)
 132         {
 133                 //f32 offset = dtime * m_view_bobbing_speed * 0.035;
 134                 f32 offset = dtime * m_view_bobbing_speed * 0.030;
 135                 if (m_view_bobbing_state == 2) {
 136                         // Animation is getting turned off
 137                         if (m_view_bobbing_anim < 0.25) {
 138                                 m_view_bobbing_anim -= offset;
 139                         } else if (m_view_bobbing_anim > 0.75) {
 140                                 m_view_bobbing_anim += offset;
 141                         }
 142
 143                         if (m_view_bobbing_anim < 0.5) {
 144                                 m_view_bobbing_anim += offset;
 145                                 if (m_view_bobbing_anim > 0.5)
 146                                         m_view_bobbing_anim = 0.5;
 147                         } else {
 148                                 m_view_bobbing_anim -= offset;
 149                                 if (m_view_bobbing_anim < 0.5)
 150                                         m_view_bobbing_anim = 0.5;
 151                         }
 152
 153                         if (m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1 ||
 154                                         fabs(m_view_bobbing_anim - 0.5) < 0.01) {
 155                                 m_view_bobbing_anim = 0;
 156                                 m_view_bobbing_state = 0;
 157                         }
 158                 }
 159                 else {
 160                         float was = m_view_bobbing_anim;
 161                         m_view_bobbing_anim = my_modf(m_view_bobbing_anim + offset);
 162                         bool step = (was == 0 ||
 163                                         (was < 0.5f && m_view_bobbing_anim >= 0.5f) ||
 164                                         (was > 0.5f && m_view_bobbing_anim <= 0.5f));
 165                         if(step) {
 166                                 MtEvent *e = new SimpleTriggerEvent("ViewBobbingStep");
 167                                 m_client->event()->put(e);
 168                         }
 169                 }
 170         }
 171
 172         if (m_digging_button != -1)
 173         {
 174                 f32 offset = dtime * 3.5;
 175                 float m_digging_anim_was = m_digging_anim;
 176                 m_digging_anim += offset;
 177                 if (m_digging_anim >= 1)
 178                 {
 179                         m_digging_anim = 0;
 180                         m_digging_button = -1;
 181                 }
 182                 float lim = 0.15;
 183                 if(m_digging_anim_was < lim && m_digging_anim >= lim)
 184                 {
 185                         if(m_digging_button == 0)
 186                         {
 187                                 MtEvent *e = new SimpleTriggerEvent("CameraPunchLeft");
 188                                 m_client->event()->put(e);
 189                         } else if(m_digging_button == 1) {
 190                                 MtEvent *e = new SimpleTriggerEvent("CameraPunchRight");
 191                                 m_client->event()->put(e);
 192                         }
 193                 }
 194         }
 195 }
 196
 197 void Camera::add_arm_inertia(f32 player_yaw, f32 frametime)
 198 {
 199         m_cam_vel.X = std::fabs((m_last_cam_pos.X - player_yaw) / m_timer.X) * 0.01f;
 200         m_cam_vel.Y = std::fabs((m_last_cam_pos.Y - m_camera_direction.Y) / m_timer.Y);
 201
 202         if (m_cam_vel.X > 1.0f || m_cam_vel.Y > 1.0f) {
 203                 /*
 204                    the arm moves when the camera moves fast enough.
 205                 */
 206
 207                 if (m_cam_vel.X > 1.0f) {
 208                         m_timer.X = 0.0f;
 209                         m_timer.X += frametime;
 210
 211                         if (m_cam_vel.X > m_cam_vel_old.X)
 212                                 m_cam_vel_old.X = m_cam_vel.X;
 213
 214                         if (m_last_cam_pos.X > player_yaw)
 215                                 // right
 216                                 m_wieldmesh_offset.X -= (0.1f + frametime) * m_cam_vel.X;
 217                         else
 218                                 // left
 219                                 m_wieldmesh_offset.X += (0.1f + frametime) * m_cam_vel.X;
 220
 221                         if (m_last_cam_pos.X != player_yaw)
 222                                 m_last_cam_pos.X = player_yaw;
 223
 224                         m_wieldmesh_offset.X = rangelim(m_wieldmesh_offset.X, 48.0f, 62.0f);
 225                 }
 226
 227                 if (m_cam_vel.Y > 1.0f) {
 228                         m_timer.Y = 0.0f;
 229                         m_timer.Y += frametime;
 230
 231                         if (m_cam_vel.Y > m_cam_vel_old.Y)
 232                                 m_cam_vel_old.Y = m_cam_vel.Y;
 233
 234                         if (m_last_cam_pos.Y > m_camera_direction.Y)
 235                                 // down
 236                                 m_wieldmesh_offset.Y += (0.1f + frametime) * m_cam_vel.Y;
 237                         else
 238                                 // up
 239                                 m_wieldmesh_offset.Y -= (0.1f + frametime) * m_cam_vel.Y;
 240
 241                         if (m_last_cam_pos.Y != m_camera_direction.Y)
 242                                 m_last_cam_pos.Y = m_camera_direction.Y;
 243
 244                         m_wieldmesh_offset.Y = rangelim(m_wieldmesh_offset.Y, -45.0f, -30.0f);
 245                 }
 246         } else {
 247                 /*
 248                    the arm now gets back to its default position when the camera stops.
 249                 */
 250
 251                 if (floor(m_wieldmesh_offset.X) == 55.0f) {
 252                         m_cam_vel_old.X = 0.0f;
 253                         m_wieldmesh_offset.X = 55.0f;
 254                 }
 255
 256                 if (m_wieldmesh_offset.X > 55.0f)
 257                         m_wieldmesh_offset.X -= (0.05f + frametime) * m_cam_vel_old.X;
 258                 if (m_wieldmesh_offset.X < 55.0f)
 259                         m_wieldmesh_offset.X += (0.05f + frametime) * m_cam_vel_old.X;
 260
 261                 if (floor(m_wieldmesh_offset.Y) == -35.0f) {
 262                         m_cam_vel_old.Y = 0.0f;
 263                         m_wieldmesh_offset.Y = -35.0f;
 264                 }
 265
 266                 if (m_wieldmesh_offset.Y > -35.0f)
 267                         m_wieldmesh_offset.Y -= (0.05f + frametime) * m_cam_vel_old.Y;
 268                 if (m_wieldmesh_offset.Y < -35.0f)
 269                         m_wieldmesh_offset.Y += (0.05f + frametime) * m_cam_vel_old.Y;
 270         }
 271 }
 272
 273 void Camera::update(LocalPlayer* player, f32 frametime, f32 busytime,
 274                 f32 tool_reload_ratio, ClientEnvironment &c_env)
 275 {
 276         // Get player position
 277         // Smooth the movement when walking up stairs
 278         v3f old_player_position = m_playernode->getPosition();
 279         v3f player_position = player->getPosition();
 280         if (player->isAttached && player->parent)
 281                 player_position = player->parent->getPosition();
 282         //if(player->touching_ground && player_position.Y > old_player_position.Y)
 283         if(player->touching_ground &&
 284                         player_position.Y > old_player_position.Y)
 285         {
 286                 f32 oldy = old_player_position.Y;
 287                 f32 newy = player_position.Y;
 288                 f32 t = exp(-23*frametime);
 289                 player_position.Y = oldy * t + newy * (1-t);
 290         }
 291
 292         // Set player node transformation
 293         m_playernode->setPosition(player_position);
 294         m_playernode->setRotation(v3f(0, -1 * player->getYaw(), 0));
 295         m_playernode->updateAbsolutePosition();
 296
 297         // Get camera tilt timer (hurt animation)
 298         float cameratilt = fabs(fabs(player->hurt_tilt_timer-0.75)-0.75);
 299
 300         // Fall bobbing animation
 301         float fall_bobbing = 0;
 302         if(player->camera_impact >= 1 && m_camera_mode < CAMERA_MODE_THIRD)
 303         {
 304                 if(m_view_bobbing_fall == -1) // Effect took place and has finished
 305                         player->camera_impact = m_view_bobbing_fall = 0;
 306                 else if(m_view_bobbing_fall == 0) // Initialize effect
 307                         m_view_bobbing_fall = 1;
 308
 309                 // Convert 0 -> 1 to 0 -> 1 -> 0
 310                 fall_bobbing = m_view_bobbing_fall < 0.5 ? m_view_bobbing_fall * 2 : -(m_view_bobbing_fall - 0.5) * 2 + 1;
 311                 // Smoothen and invert the above
 312                 fall_bobbing = sin(fall_bobbing * 0.5 * M_PI) * -1;
 313                 // Amplify according to the intensity of the impact
 314                 fall_bobbing *= (1 - rangelim(50 / player->camera_impact, 0, 1)) * 5;
 315
 316                 fall_bobbing *= m_cache_fall_bobbing_amount;
 317         }
 318
 319         // Calculate players eye offset for different camera modes
 320         v3f PlayerEyeOffset = player->getEyeOffset();
 321         if (m_camera_mode == CAMERA_MODE_FIRST)
 322                 PlayerEyeOffset += player->eye_offset_first;
 323         else
 324                 PlayerEyeOffset += player->eye_offset_third;
 325
 326         // Set head node transformation
 327         m_headnode->setPosition(PlayerEyeOffset+v3f(0,cameratilt*-player->hurt_tilt_strength+fall_bobbing,0));
 328         m_headnode->setRotation(v3f(player->getPitch(), 0, cameratilt*player->hurt_tilt_strength));
 329         m_headnode->updateAbsolutePosition();
 330
 331         // Compute relative camera position and target
 332         v3f rel_cam_pos = v3f(0,0,0);
 333         v3f rel_cam_target = v3f(0,0,1);
 334         v3f rel_cam_up = v3f(0,1,0);
 335
 336         if (m_cache_view_bobbing_amount != 0.0f && m_view_bobbing_anim != 0.0f &&
 337                 m_camera_mode < CAMERA_MODE_THIRD) {
 338                 f32 bobfrac = my_modf(m_view_bobbing_anim * 2);
 339                 f32 bobdir = (m_view_bobbing_anim < 0.5) ? 1.0 : -1.0;
 340
 341                 #if 1
 342                 f32 bobknob = 1.2;
 343                 f32 bobtmp = sin(pow(bobfrac, bobknob) * M_PI);
 344                 //f32 bobtmp2 = cos(pow(bobfrac, bobknob) * M_PI);
 345
 346                 v3f bobvec = v3f(
 347                         0.3 * bobdir * sin(bobfrac * M_PI),
 348                         -0.28 * bobtmp * bobtmp,
 349                         0.);
 350
 351                 //rel_cam_pos += 0.2 * bobvec;
 352                 //rel_cam_target += 0.03 * bobvec;
 353                 //rel_cam_up.rotateXYBy(0.02 * bobdir * bobtmp * M_PI);
 354                 float f = 1.0;
 355                 f *= m_cache_view_bobbing_amount;
 356                 rel_cam_pos += bobvec * f;
 357                 //rel_cam_target += 0.995 * bobvec * f;
 358                 rel_cam_target += bobvec * f;
 359                 rel_cam_target.Z -= 0.005 * bobvec.Z * f;
 360                 //rel_cam_target.X -= 0.005 * bobvec.X * f;
 361                 //rel_cam_target.Y -= 0.005 * bobvec.Y * f;
 362                 rel_cam_up.rotateXYBy(-0.03 * bobdir * bobtmp * M_PI * f);
 363                 #else
 364                 f32 angle_deg = 1 * bobdir * sin(bobfrac * M_PI);
 365                 f32 angle_rad = angle_deg * M_PI / 180;
 366                 f32 r = 0.05;
 367                 v3f off = v3f(
 368                         r * sin(angle_rad),
 369                         r * (cos(angle_rad) - 1),
 370                         0);
 371                 rel_cam_pos += off;
 372                 //rel_cam_target += off;
 373                 rel_cam_up.rotateXYBy(angle_deg);
 374                 #endif
 375
 376         }
 377
 378         // Compute absolute camera position and target
 379         m_headnode->getAbsoluteTransformation().transformVect(m_camera_position, rel_cam_pos);
 380         m_headnode->getAbsoluteTransformation().rotateVect(m_camera_direction, rel_cam_target - rel_cam_pos);
 381
 382         v3f abs_cam_up;
 383         m_headnode->getAbsoluteTransformation().rotateVect(abs_cam_up, rel_cam_up);
 384
 385         // Seperate camera position for calculation
 386         v3f my_cp = m_camera_position;
 387
 388         // Reposition the camera for third person view
 389         if (m_camera_mode > CAMERA_MODE_FIRST)
 390         {
 391                 if (m_camera_mode == CAMERA_MODE_THIRD_FRONT)
 392                         m_camera_direction *= -1;
 393
 394                 my_cp.Y += 2;
 395
 396                 // Calculate new position
 397                 bool abort = false;
 398                 for (int i = BS; i <= BS*2.75; i++)
 399                 {
 400                         my_cp.X = m_camera_position.X + m_camera_direction.X*-i;
 401                         my_cp.Z = m_camera_position.Z + m_camera_direction.Z*-i;
 402                         if (i > 12)
 403                                 my_cp.Y = m_camera_position.Y + (m_camera_direction.Y*-i);
 404
 405                         // Prevent camera positioned inside nodes
 406                         INodeDefManager *nodemgr = m_client->ndef();
 407                         MapNode n = c_env.getClientMap().getNodeNoEx(floatToInt(my_cp, BS));
 408                         const ContentFeatures& features = nodemgr->get(n);
 409                         if(features.walkable)
 410                         {
 411                                 my_cp.X += m_camera_direction.X*-1*-BS/2;
 412                                 my_cp.Z += m_camera_direction.Z*-1*-BS/2;
 413                                 my_cp.Y += m_camera_direction.Y*-1*-BS/2;
 414                                 abort = true;
 415                                 break;
 416                         }
 417                 }
 418
 419                 // If node blocks camera position don't move y to heigh
 420                 if (abort && my_cp.Y > player_position.Y+BS*2)
 421                         my_cp.Y = player_position.Y+BS*2;
 422         }
 423
 424         // Update offset if too far away from the center of the map
 425         m_camera_offset.X += CAMERA_OFFSET_STEP*
 426                         (((s16)(my_cp.X/BS) - m_camera_offset.X)/CAMERA_OFFSET_STEP);
 427         m_camera_offset.Y += CAMERA_OFFSET_STEP*
 428                         (((s16)(my_cp.Y/BS) - m_camera_offset.Y)/CAMERA_OFFSET_STEP);
 429         m_camera_offset.Z += CAMERA_OFFSET_STEP*
 430                         (((s16)(my_cp.Z/BS) - m_camera_offset.Z)/CAMERA_OFFSET_STEP);
 431
 432         // Set camera node transformation
 433         m_cameranode->setPosition(my_cp-intToFloat(m_camera_offset, BS));
 434         m_cameranode->setUpVector(abs_cam_up);
 435         // *100.0 helps in large map coordinates
 436         m_cameranode->setTarget(my_cp-intToFloat(m_camera_offset, BS) + 100 * m_camera_direction);
 437
 438         // update the camera position in front-view mode to render blocks behind player
 439         if (m_camera_mode == CAMERA_MODE_THIRD_FRONT)
 440                 m_camera_position = my_cp;
 441
 442         // Get FOV
 443         f32 fov_degrees;
 444         if (player->getPlayerControl().zoom && m_client->checkLocalPrivilege("zoom")) {
 445                 fov_degrees = m_cache_zoom_fov;
 446         } else {
 447                 fov_degrees = m_cache_fov;
 448         }
 449         fov_degrees = rangelim(fov_degrees, 7.0, 160.0);
 450
 451         // FOV and aspect ratio
 452         m_aspect = (f32) porting::getWindowSize().X / (f32) porting::getWindowSize().Y;
 453         m_fov_y = fov_degrees * M_PI / 180.0;
 454         // Increase vertical FOV on lower aspect ratios (<16:10)
 455         m_fov_y *= MYMAX(1.0, MYMIN(1.4, sqrt(16./10. / m_aspect)));
 456         m_fov_x = 2 * atan(m_aspect * tan(0.5 * m_fov_y));
 457         m_cameranode->setAspectRatio(m_aspect);
 458         m_cameranode->setFOV(m_fov_y);
 459
 460         if (m_arm_inertia)
 461                 add_arm_inertia(player->getYaw(), frametime);
 462
 463         // Position the wielded item
 464         //v3f wield_position = v3f(45, -35, 65);
 465         v3f wield_position = v3f(m_wieldmesh_offset.X, m_wieldmesh_offset.Y, 65);
 466         //v3f wield_rotation = v3f(-100, 120, -100);
 467         v3f wield_rotation = v3f(-100, 120, -100);
 468         wield_position.Y += fabs(m_wield_change_timer)*320 - 40;
 469         if(m_digging_anim < 0.05 || m_digging_anim > 0.5)
 470         {
 471                 f32 frac = 1.0;
 472                 if(m_digging_anim > 0.5)
 473                         frac = 2.0 * (m_digging_anim - 0.5);
 474                 // This value starts from 1 and settles to 0
 475                 f32 ratiothing = pow((1.0f - tool_reload_ratio), 0.5f);
 476                 //f32 ratiothing2 = pow(ratiothing, 0.5f);
 477                 f32 ratiothing2 = (easeCurve(ratiothing*0.5))*2.0;
 478                 wield_position.Y -= frac * 25.0 * pow(ratiothing2, 1.7f);
 479                 //wield_position.Z += frac * 5.0 * ratiothing2;
 480                 wield_position.X -= frac * 35.0 * pow(ratiothing2, 1.1f);
 481                 wield_rotation.Y += frac * 70.0 * pow(ratiothing2, 1.4f);
 482                 //wield_rotation.X -= frac * 15.0 * pow(ratiothing2, 1.4f);
 483                 //wield_rotation.Z += frac * 15.0 * pow(ratiothing2, 1.0f);
 484         }
 485         if (m_digging_button != -1)
 486         {
 487                 f32 digfrac = m_digging_anim;
 488                 wield_position.X -= 50 * sin(pow(digfrac, 0.8f) * M_PI);
 489                 wield_position.Y += 24 * sin(digfrac * 1.8 * M_PI);
 490                 wield_position.Z += 25 * 0.5;
 491
 492                 // Euler angles are PURE EVIL, so why not use quaternions?
 493                 core::quaternion quat_begin(wield_rotation * core::DEGTORAD);
 494                 core::quaternion quat_end(v3f(80, 30, 100) * core::DEGTORAD);
 495                 core::quaternion quat_slerp;
 496                 quat_slerp.slerp(quat_begin, quat_end, sin(digfrac * M_PI));
 497                 quat_slerp.toEuler(wield_rotation);
 498                 wield_rotation *= core::RADTODEG;
 499         } else {
 500                 f32 bobfrac = my_modf(m_view_bobbing_anim);
 501                 wield_position.X -= sin(bobfrac*M_PI*2.0) * 3.0;
 502                 wield_position.Y += sin(my_modf(bobfrac*2.0)*M_PI) * 3.0;
 503         }
 504         m_wieldnode->setPosition(wield_position);
 505         m_wieldnode->setRotation(wield_rotation);
 506
 507         m_wieldnode->setColor(player->light_color);
 508
 509         // Set render distance
 510         updateViewingRange();
 511
 512         // If the player is walking, swimming, or climbing,
 513         // view bobbing is enabled and free_move is off,
 514         // start (or continue) the view bobbing animation.
 515         v3f speed = player->getSpeed();
 516         const bool movement_XZ = hypot(speed.X, speed.Z) > BS;
 517         const bool movement_Y = fabs(speed.Y) > BS;
 518
 519         const bool walking = movement_XZ && player->touching_ground;
 520         const bool swimming = (movement_XZ || player->swimming_vertical) && player->in_liquid;
 521         const bool climbing = movement_Y && player->is_climbing;
 522         if ((walking || swimming || climbing) &&
 523                         (!g_settings->getBool("free_move") || !m_client->checkLocalPrivilege("fly"))) {
 524                 // Start animation
 525                 m_view_bobbing_state = 1;
 526                 m_view_bobbing_speed = MYMIN(speed.getLength(), 70);
 527         }
 528         else if (m_view_bobbing_state == 1)
 529         {
 530                 // Stop animation
 531                 m_view_bobbing_state = 2;
 532                 m_view_bobbing_speed = 60;
 533         }
 534 }
 535
 536 void Camera::updateViewingRange()
 537 {
 538         f32 viewing_range = g_settings->getFloat("viewing_range");
 539         m_draw_control.wanted_range = viewing_range;
 540         if (m_draw_control.range_all) {
 541                 m_cameranode->setFarValue(100000.0);
 542                 return;
 543         }
 544         m_cameranode->setFarValue((viewing_range < 2000) ? 2000 * BS : viewing_range * BS);
 545 }
 546
 547 void Camera::setDigging(s32 button)
 548 {
 549         if (m_digging_button == -1)
 550                 m_digging_button = button;
 551 }
 552
 553 void Camera::wield(const ItemStack &item)
 554 {
 555         if (item.name != m_wield_item_next.name ||
 556                         item.metadata != m_wield_item_next.metadata) {
 557                 m_wield_item_next = item;
 558                 if (m_wield_change_timer > 0)
 559                         m_wield_change_timer = -m_wield_change_timer;
 560                 else if (m_wield_change_timer == 0)
 561                         m_wield_change_timer = -0.001;
 562         }
 563 }
 564
 565 void Camera::drawWieldedTool(irr::core::matrix4* translation)
 566 {
 567         // Clear Z buffer so that the wielded tool stay in front of world geometry
 568         m_wieldmgr->getVideoDriver()->clearZBuffer();
 569
 570         // Draw the wielded node (in a separate scene manager)
 571         scene::ICameraSceneNode* cam = m_wieldmgr->getActiveCamera();
 572         cam->setAspectRatio(m_cameranode->getAspectRatio());
 573         cam->setFOV(72.0*M_PI/180.0);
 574         cam->setNearValue(10);
 575         cam->setFarValue(1000);
 576         if (translation != NULL)
 577         {
 578                 irr::core::matrix4 startMatrix = cam->getAbsoluteTransformation();
 579                 irr::core::vector3df focusPoint = (cam->getTarget()
 580                                 - cam->getAbsolutePosition()).setLength(1)
 581                                 + cam->getAbsolutePosition();
 582
 583                 irr::core::vector3df camera_pos =
 584                                 (startMatrix * *translation).getTranslation();
 585                 cam->setPosition(camera_pos);
 586                 cam->setTarget(focusPoint);
 587         }
 588         m_wieldmgr->drawAll();
 589 }
 590
 591 void Camera::drawNametags()
 592 {
 593         core::matrix4 trans = m_cameranode->getProjectionMatrix();
 594         trans *= m_cameranode->getViewMatrix();
 595
 596         for (std::list<Nametag *>::const_iterator
 597                         i = m_nametags.begin();
 598                         i != m_nametags.end(); ++i) {
 599                 Nametag *nametag = *i;
 600                 if (nametag->nametag_color.getAlpha() == 0) {
 601                         // Enforce hiding nametag,
 602                         // because if freetype is enabled, a grey
 603                         // shadow can remain.
 604                         continue;
 605                 }
 606                 v3f pos = nametag->parent_node->getAbsolutePosition() + v3f(0.0, 1.1 * BS, 0.0);
 607                 f32 transformed_pos[4] = { pos.X, pos.Y, pos.Z, 1.0f };
 608                 trans.multiplyWith1x4Matrix(transformed_pos);
 609                 if (transformed_pos[3] > 0) {
 610                         std::string nametag_colorless = unescape_enriched(nametag->nametag_text);
 611                         core::dimension2d<u32> textsize =
 612                                 g_fontengine->getFont()->getDimension(
 613                                 utf8_to_wide(nametag_colorless).c_str());
 614                         f32 zDiv = transformed_pos[3] == 0.0f ? 1.0f :
 615                                 core::reciprocal(transformed_pos[3]);
 616                         v2u32 screensize = m_driver->getScreenSize();
 617                         v2s32 screen_pos;
 618                         screen_pos.X = screensize.X *
 619                                 (0.5 * transformed_pos[0] * zDiv + 0.5) - textsize.Width / 2;
 620                         screen_pos.Y = screensize.Y *
 621                                 (0.5 - transformed_pos[1] * zDiv * 0.5) - textsize.Height / 2;
 622                         core::rect<s32> size(0, 0, textsize.Width, textsize.Height);
 623                         g_fontengine->getFont()->draw(utf8_to_wide(nametag->nametag_text).c_str(),
 624                                         size + screen_pos, nametag->nametag_color);
 625                 }
 626         }
 627 }
 628
 629 Nametag *Camera::addNametag(scene::ISceneNode *parent_node,
 630                 std::string nametag_text, video::SColor nametag_color)
 631 {
 632         Nametag *nametag = new Nametag(parent_node, nametag_text, nametag_color);
 633         m_nametags.push_back(nametag);
 634         return nametag;
 635 }
 636
 637 void Camera::removeNametag(Nametag *nametag)
 638 {
 639         m_nametags.remove(nametag);
 640         delete nametag;
 641 }