src/client/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 "config.h"
  24 #include "map.h"
  25 #include "clientmap.h"     // MapDrawControl
  26 #include "player.h"
  27 #include <cmath>
  28 #include "client/renderingengine.h"
  29 #include "settings.h"
  30 #include "wieldmesh.h"
  31 #include "noise.h"         // easeCurve
  32 #include "sound.h"
  33 #include "event.h"
  34 #include "nodedef.h"
  35 #include "util/numeric.h"
  36 #include "constants.h"
  37 #include "fontengine.h"
  38 #include "script/scripting_client.h"
  39
  40 #define CAMERA_OFFSET_STEP 200
  41 #define WIELDMESH_OFFSET_X 55.0f
  42 #define WIELDMESH_OFFSET_Y -35.0f
  43 #define WIELDMESH_AMPLITUDE_X 7.0f
  44 #define WIELDMESH_AMPLITUDE_Y 10.0f
  45
  46 Camera::Camera(MapDrawControl &draw_control, Client *client):
  47         m_draw_control(draw_control),
  48         m_client(client)
  49 {
  50         scene::ISceneManager *smgr = RenderingEngine::get_scene_manager();
  51         // note: making the camera node a child of the player node
  52         // would lead to unexpected behaviour, so we don't do that.
  53         m_playernode = smgr->addEmptySceneNode(smgr->getRootSceneNode());
  54         m_headnode = smgr->addEmptySceneNode(m_playernode);
  55         m_cameranode = smgr->addCameraSceneNode(smgr->getRootSceneNode());
  56         m_cameranode->bindTargetAndRotation(true);
  57
  58         // This needs to be in its own scene manager. It is drawn after
  59         // all other 3D scene nodes and before the GUI.
  60         m_wieldmgr = smgr->createNewSceneManager();
  61         m_wieldmgr->addCameraSceneNode();
  62         m_wieldnode = new WieldMeshSceneNode(m_wieldmgr, -1, false);
  63         m_wieldnode->setItem(ItemStack(), m_client);
  64         m_wieldnode->drop(); // m_wieldmgr grabbed it
  65
  66         /* TODO: Add a callback function so these can be updated when a setting
  67          *       changes.  At this point in time it doesn't matter (e.g. /set
  68          *       is documented to change server settings only)
  69          *
  70          * TODO: Local caching of settings is not optimal and should at some stage
  71          *       be updated to use a global settings object for getting thse values
  72          *       (as opposed to the this local caching). This can be addressed in
  73          *       a later release.
  74          */
  75         m_cache_fall_bobbing_amount = g_settings->getFloat("fall_bobbing_amount");
  76         m_cache_view_bobbing_amount = g_settings->getFloat("view_bobbing_amount");
  77         // 45 degrees is the lowest FOV that doesn't cause the server to treat this
  78         // as a zoom FOV and load world beyond the set server limits.
  79         m_cache_fov                 = std::fmax(g_settings->getFloat("fov"), 45.0f);
  80         m_arm_inertia               = g_settings->getBool("arm_inertia");
  81         m_nametags.clear();
  82 }
  83
  84 Camera::~Camera()
  85 {
  86         m_wieldmgr->drop();
  87 }
  88
  89 bool Camera::successfullyCreated(std::string &error_message)
  90 {
  91         if (!m_playernode) {
  92                 error_message = "Failed to create the player scene node";
  93         } else if (!m_headnode) {
  94                 error_message = "Failed to create the head scene node";
  95         } else if (!m_cameranode) {
  96                 error_message = "Failed to create the camera scene node";
  97         } else if (!m_wieldmgr) {
  98                 error_message = "Failed to create the wielded item scene manager";
  99         } else if (!m_wieldnode) {
 100                 error_message = "Failed to create the wielded item scene node";
 101         } else {
 102                 error_message.clear();
 103         }
 104
 105         if (m_client->modsLoaded())
 106                 m_client->getScript()->on_camera_ready(this);
 107
 108         return error_message.empty();
 109 }
 110
 111 // Returns the fractional part of x
 112 inline f32 my_modf(f32 x)
 113 {
 114         double dummy;
 115         return modf(x, &dummy);
 116 }
 117
 118 void Camera::step(f32 dtime)
 119 {
 120         if(m_view_bobbing_fall > 0)
 121         {
 122                 m_view_bobbing_fall -= 3 * dtime;
 123                 if(m_view_bobbing_fall <= 0)
 124                         m_view_bobbing_fall = -1; // Mark the effect as finished
 125         }
 126
 127         bool was_under_zero = m_wield_change_timer < 0;
 128         m_wield_change_timer = MYMIN(m_wield_change_timer + dtime, 0.125);
 129
 130         if (m_wield_change_timer >= 0 && was_under_zero)
 131                 m_wieldnode->setItem(m_wield_item_next, m_client);
 132
 133         if (m_view_bobbing_state != 0)
 134         {
 135                 //f32 offset = dtime * m_view_bobbing_speed * 0.035;
 136                 f32 offset = dtime * m_view_bobbing_speed * 0.030;
 137                 if (m_view_bobbing_state == 2) {
 138                         // Animation is getting turned off
 139                         if (m_view_bobbing_anim < 0.25) {
 140                                 m_view_bobbing_anim -= offset;
 141                         } else if (m_view_bobbing_anim > 0.75) {
 142                                 m_view_bobbing_anim += offset;
 143                         }
 144
 145                         if (m_view_bobbing_anim < 0.5) {
 146                                 m_view_bobbing_anim += offset;
 147                                 if (m_view_bobbing_anim > 0.5)
 148                                         m_view_bobbing_anim = 0.5;
 149                         } else {
 150                                 m_view_bobbing_anim -= offset;
 151                                 if (m_view_bobbing_anim < 0.5)
 152                                         m_view_bobbing_anim = 0.5;
 153                         }
 154
 155                         if (m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1 ||
 156                                         fabs(m_view_bobbing_anim - 0.5) < 0.01) {
 157                                 m_view_bobbing_anim = 0;
 158                                 m_view_bobbing_state = 0;
 159                         }
 160                 }
 161                 else {
 162                         float was = m_view_bobbing_anim;
 163                         m_view_bobbing_anim = my_modf(m_view_bobbing_anim + offset);
 164                         bool step = (was == 0 ||
 165                                         (was < 0.5f && m_view_bobbing_anim >= 0.5f) ||
 166                                         (was > 0.5f && m_view_bobbing_anim <= 0.5f));
 167                         if(step) {
 168                                 m_client->getEventManager()->put(new SimpleTriggerEvent(MtEvent::VIEW_BOBBING_STEP));
 169                         }
 170                 }
 171         }
 172
 173         if (m_digging_button != -1) {
 174                 f32 offset = dtime * 3.5f;
 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                                 m_client->getEventManager()->put(new SimpleTriggerEvent(MtEvent::CAMERA_PUNCH_LEFT));
 187                         } else if(m_digging_button == 1) {
 188                                 m_client->getEventManager()->put(new SimpleTriggerEvent(MtEvent::CAMERA_PUNCH_RIGHT));
 189                         }
 190                 }
 191         }
 192 }
 193
 194 static inline v2f dir(const v2f &pos_dist)
 195 {
 196         f32 x = pos_dist.X - WIELDMESH_OFFSET_X;
 197         f32 y = pos_dist.Y - WIELDMESH_OFFSET_Y;
 198
 199         f32 x_abs = std::fabs(x);
 200         f32 y_abs = std::fabs(y);
 201
 202         if (x_abs >= y_abs) {
 203                 y *= (1.0f / x_abs);
 204                 x /= x_abs;
 205         }
 206
 207         if (y_abs >= x_abs) {
 208                 x *= (1.0f / y_abs);
 209                 y /= y_abs;
 210         }
 211
 212         return v2f(std::fabs(x), std::fabs(y));
 213 }
 214
 215 void Camera::addArmInertia(f32 player_yaw)
 216 {
 217         m_cam_vel.X = std::fabs(rangelim(m_last_cam_pos.X - player_yaw,
 218                 -100.0f, 100.0f) / 0.016f) * 0.01f;
 219         m_cam_vel.Y = std::fabs((m_last_cam_pos.Y - m_camera_direction.Y) / 0.016f);
 220         f32 gap_X = std::fabs(WIELDMESH_OFFSET_X - m_wieldmesh_offset.X);
 221         f32 gap_Y = std::fabs(WIELDMESH_OFFSET_Y - m_wieldmesh_offset.Y);
 222
 223         if (m_cam_vel.X > 1.0f || m_cam_vel.Y > 1.0f) {
 224                 /*
 225                     The arm moves relative to the camera speed,
 226                     with an acceleration factor.
 227                 */
 228
 229                 if (m_cam_vel.X > 1.0f) {
 230                         if (m_cam_vel.X > m_cam_vel_old.X)
 231                                 m_cam_vel_old.X = m_cam_vel.X;
 232
 233                         f32 acc_X = 0.12f * (m_cam_vel.X - (gap_X * 0.1f));
 234                         m_wieldmesh_offset.X += m_last_cam_pos.X < player_yaw ? acc_X : -acc_X;
 235
 236                         if (m_last_cam_pos.X != player_yaw)
 237                                 m_last_cam_pos.X = player_yaw;
 238
 239                         m_wieldmesh_offset.X = rangelim(m_wieldmesh_offset.X,
 240                                 WIELDMESH_OFFSET_X - (WIELDMESH_AMPLITUDE_X * 0.5f),
 241                                 WIELDMESH_OFFSET_X + (WIELDMESH_AMPLITUDE_X * 0.5f));
 242                 }
 243
 244                 if (m_cam_vel.Y > 1.0f) {
 245                         if (m_cam_vel.Y > m_cam_vel_old.Y)
 246                                 m_cam_vel_old.Y = m_cam_vel.Y;
 247
 248                         f32 acc_Y = 0.12f * (m_cam_vel.Y - (gap_Y * 0.1f));
 249                         m_wieldmesh_offset.Y +=
 250                                 m_last_cam_pos.Y > m_camera_direction.Y ? acc_Y : -acc_Y;
 251
 252                         if (m_last_cam_pos.Y != m_camera_direction.Y)
 253                                 m_last_cam_pos.Y = m_camera_direction.Y;
 254
 255                         m_wieldmesh_offset.Y = rangelim(m_wieldmesh_offset.Y,
 256                                 WIELDMESH_OFFSET_Y - (WIELDMESH_AMPLITUDE_Y * 0.5f),
 257                                 WIELDMESH_OFFSET_Y + (WIELDMESH_AMPLITUDE_Y * 0.5f));
 258                 }
 259
 260                 m_arm_dir = dir(m_wieldmesh_offset);
 261         } else {
 262                 /*
 263                     Now the arm gets back to its default position when the camera stops,
 264                     following a vector, with a smooth deceleration factor.
 265                 */
 266
 267                 f32 dec_X = 0.35f * (std::min(15.0f, m_cam_vel_old.X) * (1.0f +
 268                         (1.0f - m_arm_dir.X))) * (gap_X / 20.0f);
 269
 270                 f32 dec_Y = 0.25f * (std::min(15.0f, m_cam_vel_old.Y) * (1.0f +
 271                         (1.0f - m_arm_dir.Y))) * (gap_Y / 15.0f);
 272
 273                 if (gap_X < 0.1f)
 274                         m_cam_vel_old.X = 0.0f;
 275
 276                 m_wieldmesh_offset.X -=
 277                         m_wieldmesh_offset.X > WIELDMESH_OFFSET_X ? dec_X : -dec_X;
 278
 279                 if (gap_Y < 0.1f)
 280                         m_cam_vel_old.Y = 0.0f;
 281
 282                 m_wieldmesh_offset.Y -=
 283                         m_wieldmesh_offset.Y > WIELDMESH_OFFSET_Y ? dec_Y : -dec_Y;
 284         }
 285 }
 286
 287 void Camera::update(LocalPlayer* player, f32 frametime, f32 busytime, f32 tool_reload_ratio)
 288 {
 289         // Get player position
 290         // Smooth the movement when walking up stairs
 291         v3f old_player_position = m_playernode->getPosition();
 292         v3f player_position = player->getPosition();
 293
 294         // This is worse than `LocalPlayer::getPosition()` but
 295         // mods expect the player head to be at the parent's position
 296         // plus eye height.
 297         if (player->getParent())
 298                 player_position = player->getParent()->getPosition();
 299
 300         if(player->touching_ground &&
 301                         player_position.Y > old_player_position.Y)
 302         {
 303                 f32 oldy = old_player_position.Y;
 304                 f32 newy = player_position.Y;
 305                 f32 t = std::exp(-23 * frametime);
 306                 player_position.Y = oldy * t + newy * (1-t);
 307         }
 308
 309         // Set player node transformation
 310         m_playernode->setPosition(player_position);
 311         m_playernode->setRotation(v3f(0, -1 * player->getYaw(), 0));
 312         m_playernode->updateAbsolutePosition();
 313
 314         // Get camera tilt timer (hurt animation)
 315         float cameratilt = fabs(fabs(player->hurt_tilt_timer-0.75)-0.75);
 316
 317         // Fall bobbing animation
 318         float fall_bobbing = 0;
 319         if(player->camera_impact >= 1 && m_camera_mode < CAMERA_MODE_THIRD)
 320         {
 321                 if(m_view_bobbing_fall == -1) // Effect took place and has finished
 322                         player->camera_impact = m_view_bobbing_fall = 0;
 323                 else if(m_view_bobbing_fall == 0) // Initialize effect
 324                         m_view_bobbing_fall = 1;
 325
 326                 // Convert 0 -> 1 to 0 -> 1 -> 0
 327                 fall_bobbing = m_view_bobbing_fall < 0.5 ? m_view_bobbing_fall * 2 : -(m_view_bobbing_fall - 0.5) * 2 + 1;
 328                 // Smoothen and invert the above
 329                 fall_bobbing = sin(fall_bobbing * 0.5 * M_PI) * -1;
 330                 // Amplify according to the intensity of the impact
 331                 fall_bobbing *= (1 - rangelim(50 / player->camera_impact, 0, 1)) * 5;
 332
 333                 fall_bobbing *= m_cache_fall_bobbing_amount;
 334         }
 335
 336         // Calculate players eye offset for different camera modes
 337         v3f PlayerEyeOffset = player->getEyeOffset();
 338         if (m_camera_mode == CAMERA_MODE_FIRST)
 339                 PlayerEyeOffset += player->eye_offset_first;
 340         else
 341                 PlayerEyeOffset += player->eye_offset_third;
 342
 343         // Set head node transformation
 344         m_headnode->setPosition(PlayerEyeOffset+v3f(0,cameratilt*-player->hurt_tilt_strength+fall_bobbing,0));
 345         m_headnode->setRotation(v3f(player->getPitch(), 0, cameratilt*player->hurt_tilt_strength));
 346         m_headnode->updateAbsolutePosition();
 347
 348         // Compute relative camera position and target
 349         v3f rel_cam_pos = v3f(0,0,0);
 350         v3f rel_cam_target = v3f(0,0,1);
 351         v3f rel_cam_up = v3f(0,1,0);
 352
 353         if (m_cache_view_bobbing_amount != 0.0f && m_view_bobbing_anim != 0.0f &&
 354                 m_camera_mode < CAMERA_MODE_THIRD) {
 355                 f32 bobfrac = my_modf(m_view_bobbing_anim * 2);
 356                 f32 bobdir = (m_view_bobbing_anim < 0.5) ? 1.0 : -1.0;
 357
 358                 #if 1
 359                 f32 bobknob = 1.2;
 360                 f32 bobtmp = sin(pow(bobfrac, bobknob) * M_PI);
 361                 //f32 bobtmp2 = cos(pow(bobfrac, bobknob) * M_PI);
 362
 363                 v3f bobvec = v3f(
 364                         0.3 * bobdir * sin(bobfrac * M_PI),
 365                         -0.28 * bobtmp * bobtmp,
 366                         0.);
 367
 368                 //rel_cam_pos += 0.2 * bobvec;
 369                 //rel_cam_target += 0.03 * bobvec;
 370                 //rel_cam_up.rotateXYBy(0.02 * bobdir * bobtmp * M_PI);
 371                 float f = 1.0;
 372                 f *= m_cache_view_bobbing_amount;
 373                 rel_cam_pos += bobvec * f;
 374                 //rel_cam_target += 0.995 * bobvec * f;
 375                 rel_cam_target += bobvec * f;
 376                 rel_cam_target.Z -= 0.005 * bobvec.Z * f;
 377                 //rel_cam_target.X -= 0.005 * bobvec.X * f;
 378                 //rel_cam_target.Y -= 0.005 * bobvec.Y * f;
 379                 rel_cam_up.rotateXYBy(-0.03 * bobdir * bobtmp * M_PI * f);
 380                 #else
 381                 f32 angle_deg = 1 * bobdir * sin(bobfrac * M_PI);
 382                 f32 angle_rad = angle_deg * M_PI / 180;
 383                 f32 r = 0.05;
 384                 v3f off = v3f(
 385                         r * sin(angle_rad),
 386                         r * (cos(angle_rad) - 1),
 387                         0);
 388                 rel_cam_pos += off;
 389                 //rel_cam_target += off;
 390                 rel_cam_up.rotateXYBy(angle_deg);
 391                 #endif
 392
 393         }
 394
 395         // Compute absolute camera position and target
 396         m_headnode->getAbsoluteTransformation().transformVect(m_camera_position, rel_cam_pos);
 397         m_headnode->getAbsoluteTransformation().rotateVect(m_camera_direction, rel_cam_target - rel_cam_pos);
 398
 399         v3f abs_cam_up;
 400         m_headnode->getAbsoluteTransformation().rotateVect(abs_cam_up, rel_cam_up);
 401
 402         // Seperate camera position for calculation
 403         v3f my_cp = m_camera_position;
 404
 405         // Reposition the camera for third person view
 406         if (m_camera_mode > CAMERA_MODE_FIRST)
 407         {
 408                 if (m_camera_mode == CAMERA_MODE_THIRD_FRONT)
 409                         m_camera_direction *= -1;
 410
 411                 my_cp.Y += 2;
 412
 413                 // Calculate new position
 414                 bool abort = false;
 415                 for (int i = BS; i <= BS * 2.75; i++) {
 416                         my_cp.X = m_camera_position.X + m_camera_direction.X * -i;
 417                         my_cp.Z = m_camera_position.Z + m_camera_direction.Z * -i;
 418                         if (i > 12)
 419                                 my_cp.Y = m_camera_position.Y + (m_camera_direction.Y * -i);
 420
 421                         // Prevent camera positioned inside nodes
 422                         const NodeDefManager *nodemgr = m_client->ndef();
 423                         MapNode n = m_client->getEnv().getClientMap()
 424                                 .getNode(floatToInt(my_cp, BS));
 425
 426                         const ContentFeatures& features = nodemgr->get(n);
 427                         if (features.walkable) {
 428                                 my_cp.X += m_camera_direction.X*-1*-BS/2;
 429                                 my_cp.Z += m_camera_direction.Z*-1*-BS/2;
 430                                 my_cp.Y += m_camera_direction.Y*-1*-BS/2;
 431                                 abort = true;
 432                                 break;
 433                         }
 434                 }
 435
 436                 // If node blocks camera position don't move y to heigh
 437                 if (abort && my_cp.Y > player_position.Y+BS*2)
 438                         my_cp.Y = player_position.Y+BS*2;
 439         }
 440
 441         // Update offset if too far away from the center of the map
 442         m_camera_offset.X += CAMERA_OFFSET_STEP*
 443                         (((s16)(my_cp.X/BS) - m_camera_offset.X)/CAMERA_OFFSET_STEP);
 444         m_camera_offset.Y += CAMERA_OFFSET_STEP*
 445                         (((s16)(my_cp.Y/BS) - m_camera_offset.Y)/CAMERA_OFFSET_STEP);
 446         m_camera_offset.Z += CAMERA_OFFSET_STEP*
 447                         (((s16)(my_cp.Z/BS) - m_camera_offset.Z)/CAMERA_OFFSET_STEP);
 448
 449         // Set camera node transformation
 450         m_cameranode->setPosition(my_cp-intToFloat(m_camera_offset, BS));
 451         m_cameranode->setUpVector(abs_cam_up);
 452         // *100.0 helps in large map coordinates
 453         m_cameranode->setTarget(my_cp-intToFloat(m_camera_offset, BS) + 100 * m_camera_direction);
 454
 455         // update the camera position in third-person mode to render blocks behind player
 456         // and correctly apply liquid post FX.
 457         if (m_camera_mode != CAMERA_MODE_FIRST)
 458                 m_camera_position = my_cp;
 459
 460         /*
 461          * Apply server-sent FOV. If server doesn't enforce FOV,
 462          * check for zoom and set to zoom FOV.
 463          * Otherwise, default to m_cache_fov
 464          */
 465
 466         f32 fov_degrees;
 467         PlayerFovSpec fov_spec = player->getFov();
 468         if (fov_spec.fov > 0.0f) {
 469                 // If server-sent FOV is a multiplier, multiply
 470                 // it with m_cache_fov instead of overriding
 471                 if (fov_spec.is_multiplier)
 472                         fov_degrees = m_cache_fov * fov_spec.fov;
 473                 else
 474                         fov_degrees = fov_spec.fov;
 475         } else if (player->getPlayerControl().zoom && player->getZoomFOV() > 0.001f) {
 476                 // Player requests zoom, apply zoom FOV
 477                 fov_degrees = player->getZoomFOV();
 478         } else {
 479                 // Set to client's selected FOV
 480                 fov_degrees = m_cache_fov;
 481         }
 482         fov_degrees = rangelim(fov_degrees, 1.0f, 160.0f);
 483
 484         // FOV and aspect ratio
 485         const v2u32 &window_size = RenderingEngine::get_instance()->getWindowSize();
 486         m_aspect = (f32) window_size.X / (f32) window_size.Y;
 487         m_fov_y = fov_degrees * M_PI / 180.0;
 488         // Increase vertical FOV on lower aspect ratios (<16:10)
 489         m_fov_y *= MYMAX(1.0, MYMIN(1.4, sqrt(16./10. / m_aspect)));
 490         m_fov_x = 2 * atan(m_aspect * tan(0.5 * m_fov_y));
 491         m_cameranode->setAspectRatio(m_aspect);
 492         m_cameranode->setFOV(m_fov_y);
 493
 494         if (m_arm_inertia)
 495                 addArmInertia(player->getYaw());
 496
 497         // Position the wielded item
 498         //v3f wield_position = v3f(45, -35, 65);
 499         v3f wield_position = v3f(m_wieldmesh_offset.X, m_wieldmesh_offset.Y, 65);
 500         //v3f wield_rotation = v3f(-100, 120, -100);
 501         v3f wield_rotation = v3f(-100, 120, -100);
 502         wield_position.Y += fabs(m_wield_change_timer)*320 - 40;
 503         if(m_digging_anim < 0.05 || m_digging_anim > 0.5)
 504         {
 505                 f32 frac = 1.0;
 506                 if(m_digging_anim > 0.5)
 507                         frac = 2.0 * (m_digging_anim - 0.5);
 508                 // This value starts from 1 and settles to 0
 509                 f32 ratiothing = std::pow((1.0f - tool_reload_ratio), 0.5f);
 510                 //f32 ratiothing2 = pow(ratiothing, 0.5f);
 511                 f32 ratiothing2 = (easeCurve(ratiothing*0.5))*2.0;
 512                 wield_position.Y -= frac * 25.0 * pow(ratiothing2, 1.7f);
 513                 //wield_position.Z += frac * 5.0 * ratiothing2;
 514                 wield_position.X -= frac * 35.0 * pow(ratiothing2, 1.1f);
 515                 wield_rotation.Y += frac * 70.0 * pow(ratiothing2, 1.4f);
 516                 //wield_rotation.X -= frac * 15.0 * pow(ratiothing2, 1.4f);
 517                 //wield_rotation.Z += frac * 15.0 * pow(ratiothing2, 1.0f);
 518         }
 519         if (m_digging_button != -1)
 520         {
 521                 f32 digfrac = m_digging_anim;
 522                 wield_position.X -= 50 * sin(pow(digfrac, 0.8f) * M_PI);
 523                 wield_position.Y += 24 * sin(digfrac * 1.8 * M_PI);
 524                 wield_position.Z += 25 * 0.5;
 525
 526                 // Euler angles are PURE EVIL, so why not use quaternions?
 527                 core::quaternion quat_begin(wield_rotation * core::DEGTORAD);
 528                 core::quaternion quat_end(v3f(80, 30, 100) * core::DEGTORAD);
 529                 core::quaternion quat_slerp;
 530                 quat_slerp.slerp(quat_begin, quat_end, sin(digfrac * M_PI));
 531                 quat_slerp.toEuler(wield_rotation);
 532                 wield_rotation *= core::RADTODEG;
 533         } else {
 534                 f32 bobfrac = my_modf(m_view_bobbing_anim);
 535                 wield_position.X -= sin(bobfrac*M_PI*2.0) * 3.0;
 536                 wield_position.Y += sin(my_modf(bobfrac*2.0)*M_PI) * 3.0;
 537         }
 538         m_wieldnode->setPosition(wield_position);
 539         m_wieldnode->setRotation(wield_rotation);
 540
 541         m_wieldnode->setColor(player->light_color);
 542
 543         // Set render distance
 544         updateViewingRange();
 545
 546         // If the player is walking, swimming, or climbing,
 547         // view bobbing is enabled and free_move is off,
 548         // start (or continue) the view bobbing animation.
 549         const v3f &speed = player->getSpeed();
 550         const bool movement_XZ = hypot(speed.X, speed.Z) > BS;
 551         const bool movement_Y = fabs(speed.Y) > BS;
 552
 553         const bool walking = movement_XZ && player->touching_ground;
 554         const bool swimming = (movement_XZ || player->swimming_vertical) && player->in_liquid;
 555         const bool climbing = movement_Y && player->is_climbing;
 556         if ((walking || swimming || climbing) &&
 557                         (!g_settings->getBool("free_move") || !m_client->checkLocalPrivilege("fly"))) {
 558                 // Start animation
 559                 m_view_bobbing_state = 1;
 560                 m_view_bobbing_speed = MYMIN(speed.getLength(), 70);
 561         }
 562         else if (m_view_bobbing_state == 1)
 563         {
 564                 // Stop animation
 565                 m_view_bobbing_state = 2;
 566                 m_view_bobbing_speed = 60;
 567         }
 568 }
 569
 570 void Camera::updateViewingRange()
 571 {
 572         f32 viewing_range = g_settings->getFloat("viewing_range");
 573
 574         // Ignore near_plane setting on all other platforms to prevent abuse
 575 #if ENABLE_GLES
 576         m_cameranode->setNearValue(rangelim(
 577                 g_settings->getFloat("near_plane"), 0.0f, 0.25f) * BS);
 578 #else
 579         m_cameranode->setNearValue(0.1f * BS);
 580 #endif
 581
 582         m_draw_control.wanted_range = std::fmin(adjustDist(viewing_range, getFovMax()), 4000);
 583         if (m_draw_control.range_all) {
 584                 m_cameranode->setFarValue(100000.0);
 585                 return;
 586         }
 587         m_cameranode->setFarValue((viewing_range < 2000) ? 2000 * BS : viewing_range * BS);
 588 }
 589
 590 void Camera::setDigging(s32 button)
 591 {
 592         if (m_digging_button == -1)
 593                 m_digging_button = button;
 594 }
 595
 596 void Camera::wield(const ItemStack &item)
 597 {
 598         if (item.name != m_wield_item_next.name ||
 599                         item.metadata != m_wield_item_next.metadata) {
 600                 m_wield_item_next = item;
 601                 if (m_wield_change_timer > 0)
 602                         m_wield_change_timer = -m_wield_change_timer;
 603                 else if (m_wield_change_timer == 0)
 604                         m_wield_change_timer = -0.001;
 605         }
 606 }
 607
 608 void Camera::drawWieldedTool(irr::core::matrix4* translation)
 609 {
 610         // Clear Z buffer so that the wielded tool stays in front of world geometry
 611         m_wieldmgr->getVideoDriver()->clearZBuffer();
 612
 613         // Draw the wielded node (in a separate scene manager)
 614         scene::ICameraSceneNode* cam = m_wieldmgr->getActiveCamera();
 615         cam->setAspectRatio(m_cameranode->getAspectRatio());
 616         cam->setFOV(72.0*M_PI/180.0);
 617         cam->setNearValue(10);
 618         cam->setFarValue(1000);
 619         if (translation != NULL)
 620         {
 621                 irr::core::matrix4 startMatrix = cam->getAbsoluteTransformation();
 622                 irr::core::vector3df focusPoint = (cam->getTarget()
 623                                 - cam->getAbsolutePosition()).setLength(1)
 624                                 + cam->getAbsolutePosition();
 625
 626                 irr::core::vector3df camera_pos =
 627                                 (startMatrix * *translation).getTranslation();
 628                 cam->setPosition(camera_pos);
 629                 cam->setTarget(focusPoint);
 630         }
 631         m_wieldmgr->drawAll();
 632 }
 633
 634 void Camera::drawNametags()
 635 {
 636         core::matrix4 trans = m_cameranode->getProjectionMatrix();
 637         trans *= m_cameranode->getViewMatrix();
 638
 639         for (std::list<Nametag *>::const_iterator
 640                         i = m_nametags.begin();
 641                         i != m_nametags.end(); ++i) {
 642                 Nametag *nametag = *i;
 643                 if (nametag->nametag_color.getAlpha() == 0) {
 644                         // Enforce hiding nametag,
 645                         // because if freetype is enabled, a grey
 646                         // shadow can remain.
 647                         continue;
 648                 }
 649                 v3f pos = nametag->parent_node->getAbsolutePosition() + nametag->nametag_pos * BS;
 650                 f32 transformed_pos[4] = { pos.X, pos.Y, pos.Z, 1.0f };
 651                 trans.multiplyWith1x4Matrix(transformed_pos);
 652                 if (transformed_pos[3] > 0) {
 653                         std::wstring nametag_colorless =
 654                                 unescape_translate(utf8_to_wide(nametag->nametag_text));
 655                         core::dimension2d<u32> textsize =
 656                                 g_fontengine->getFont()->getDimension(
 657                                 nametag_colorless.c_str());
 658                         f32 zDiv = transformed_pos[3] == 0.0f ? 1.0f :
 659                                 core::reciprocal(transformed_pos[3]);
 660                         v2u32 screensize = RenderingEngine::get_video_driver()->getScreenSize();
 661                         v2s32 screen_pos;
 662                         screen_pos.X = screensize.X *
 663                                 (0.5 * transformed_pos[0] * zDiv + 0.5) - textsize.Width / 2;
 664                         screen_pos.Y = screensize.Y *
 665                                 (0.5 - transformed_pos[1] * zDiv * 0.5) - textsize.Height / 2;
 666                         core::rect<s32> size(0, 0, textsize.Width, textsize.Height);
 667                         g_fontengine->getFont()->draw(
 668                                 translate_string(utf8_to_wide(nametag->nametag_text)).c_str(),
 669                                 size + screen_pos, nametag->nametag_color);
 670                 }
 671         }
 672 }
 673
 674 Nametag *Camera::addNametag(scene::ISceneNode *parent_node,
 675                 const std::string &nametag_text, video::SColor nametag_color,
 676                 const v3f &pos)
 677 {
 678         Nametag *nametag = new Nametag(parent_node, nametag_text, nametag_color, pos);
 679         m_nametags.push_back(nametag);
 680         return nametag;
 681 }
 682
 683 void Camera::removeNametag(Nametag *nametag)
 684 {
 685         m_nametags.remove(nametag);
 686         delete nametag;
 687 }