src/player.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010 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 General Public License as published by
   7 the Free Software Foundation; either version 2 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 General Public License for more details.
  14
  15 You should have received a copy of the GNU 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 /*
  21 (c) 2010 Perttu Ahola <celeron55@gmail.com>
  22 */
  23
  24 #include "player.h"
  25 #include "map.h"
  26 #include "connection.h"
  27 #include "constants.h"
  28
  29 Player::Player():
  30         touching_ground(false),
  31         in_water(false),
  32         inventory(PLAYER_INVENTORY_SIZE),
  33         peer_id(PEER_ID_NEW),
  34         m_speed(0,0,0),
  35         m_position(0,0,0)
  36 {
  37         updateName("<not set>");
  38 }
  39
  40 Player::~Player()
  41 {
  42 }
  43
  44 void Player::move(f32 dtime, Map &map)
  45 {
  46         v3f position = getPosition();
  47         v3f oldpos = position;
  48         v3s16 oldpos_i = floatToInt(oldpos);
  49
  50         /*std::cout<<"oldpos_i=("<<oldpos_i.X<<","<<oldpos_i.Y<<","
  51                         <<oldpos_i.Z<<")"<<std::endl;*/
  52
  53         position += m_speed * dtime;
  54
  55         // Skip collision detection if player is non-local
  56         if(isLocal() == false)
  57         {
  58                 setPosition(position);
  59                 return;
  60         }
  61
  62         /*
  63                 Collision detection
  64         */
  65
  66         v3s16 pos_i = floatToInt(position);
  67
  68         /*
  69                 Check if player is in water
  70         */
  71         try{
  72                 if(in_water)
  73                 {
  74                         v3s16 pp = floatToInt(position + v3f(0,0,0));
  75                         in_water = content_liquid(map.getNode(pp).d);
  76                 }
  77                 else
  78                 {
  79                         v3s16 pp = floatToInt(position + v3f(0,BS/2,0));
  80                         in_water = content_liquid(map.getNode(pp).d);
  81                 }
  82         }
  83         catch(InvalidPositionException &e)
  84         {
  85                 in_water = false;
  86         }
  87
  88         // The frame length is limited to the player going 0.1*BS per call
  89         f32 d = (float)BS * 0.15;
  90
  91 #define PLAYER_RADIUS (BS*0.3)
  92 #define PLAYER_HEIGHT (BS*1.7)
  93
  94         core::aabbox3d<f32> playerbox(
  95                 position.X - PLAYER_RADIUS,
  96                 position.Y - 0.0,
  97                 position.Z - PLAYER_RADIUS,
  98                 position.X + PLAYER_RADIUS,
  99                 position.Y + PLAYER_HEIGHT,
 100                 position.Z + PLAYER_RADIUS
 101         );
 102         core::aabbox3d<f32> playerbox_old(
 103                 oldpos.X - PLAYER_RADIUS,
 104                 oldpos.Y - 0.0,
 105                 oldpos.Z - PLAYER_RADIUS,
 106                 oldpos.X + PLAYER_RADIUS,
 107                 oldpos.Y + PLAYER_HEIGHT,
 108                 oldpos.Z + PLAYER_RADIUS
 109         );
 110
 111         //hilightboxes.push_back(playerbox);
 112
 113         touching_ground = false;
 114
 115         /*std::cout<<"Checking collisions for ("
 116                         <<oldpos_i.X<<","<<oldpos_i.Y<<","<<oldpos_i.Z
 117                         <<") -> ("
 118                         <<pos_i.X<<","<<pos_i.Y<<","<<pos_i.Z
 119                         <<"):"<<std::endl;*/
 120
 121         for(s16 y = oldpos_i.Y - 1; y <= oldpos_i.Y + 2; y++){
 122                 for(s16 z = oldpos_i.Z - 1; z <= oldpos_i.Z + 1; z++){
 123                         for(s16 x = oldpos_i.X - 1; x <= oldpos_i.X + 1; x++){
 124                                 try{
 125                                         if(content_walkable(map.getNode(v3s16(x,y,z)).d) == false){
 126                                                 continue;
 127                                         }
 128                                 }
 129                                 catch(InvalidPositionException &e)
 130                                 {
 131                                         // Doing nothing here will block the player from
 132                                         // walking over map borders
 133                                 }
 134
 135                                 core::aabbox3d<f32> nodebox = Map::getNodeBox(
 136                                                 v3s16(x,y,z));
 137
 138                                 // See if the player is touching ground
 139                                 if(
 140                                                 fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < d
 141                                                 && nodebox.MaxEdge.X-d > playerbox.MinEdge.X
 142                                                 && nodebox.MinEdge.X+d < playerbox.MaxEdge.X
 143                                                 && nodebox.MaxEdge.Z-d > playerbox.MinEdge.Z
 144                                                 && nodebox.MinEdge.Z+d < playerbox.MaxEdge.Z
 145                                 ){
 146                                         touching_ground = true;
 147                                 }
 148
 149                                 if(playerbox.intersectsWithBox(nodebox))
 150                                 {
 151
 152         v3f dirs[3] = {
 153                 v3f(0,0,1), // back
 154                 v3f(0,1,0), // top
 155                 v3f(1,0,0), // right
 156         };
 157         for(u16 i=0; i<3; i++)
 158         {
 159                 f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[i]);
 160                 f32 nodemin = nodebox.MinEdge.dotProduct(dirs[i]);
 161                 f32 playermax = playerbox.MaxEdge.dotProduct(dirs[i]);
 162                 f32 playermin = playerbox.MinEdge.dotProduct(dirs[i]);
 163                 f32 playermax_old = playerbox_old.MaxEdge.dotProduct(dirs[i]);
 164                 f32 playermin_old = playerbox_old.MinEdge.dotProduct(dirs[i]);
 165
 166                 bool main_edge_collides =
 167                         ((nodemax > playermin && nodemax <= playermin_old + d
 168                                 && m_speed.dotProduct(dirs[i]) < 0)
 169                         ||
 170                         (nodemin < playermax && nodemin >= playermax_old - d
 171                                 && m_speed.dotProduct(dirs[i]) > 0));
 172
 173                 bool other_edges_collide = true;
 174                 for(u16 j=0; j<3; j++)
 175                 {
 176                         if(j == i)
 177                                 continue;
 178                         f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[j]);
 179                         f32 nodemin = nodebox.MinEdge.dotProduct(dirs[j]);
 180                         f32 playermax = playerbox.MaxEdge.dotProduct(dirs[j]);
 181                         f32 playermin = playerbox.MinEdge.dotProduct(dirs[j]);
 182                         if(!(nodemax - d > playermin && nodemin + d < playermax))
 183                         {
 184                                 other_edges_collide = false;
 185                                 break;
 186                         }
 187                 }
 188
 189                 if(main_edge_collides && other_edges_collide)
 190                 {
 191                         m_speed -= m_speed.dotProduct(dirs[i]) * dirs[i];
 192                         position -= position.dotProduct(dirs[i]) * dirs[i];
 193                         position += oldpos.dotProduct(dirs[i]) * dirs[i];
 194                 }
 195
 196         }
 197                                 } // if(playerbox.intersectsWithBox(nodebox))
 198                         } // for x
 199                 } // for z
 200         } // for y
 201
 202         setPosition(position);
 203 }
 204
 205 // Y direction is ignored
 206 void Player::accelerate(v3f target_speed, f32 max_increase)
 207 {
 208         if(m_speed.X < target_speed.X - max_increase)
 209                 m_speed.X += max_increase;
 210         else if(m_speed.X > target_speed.X + max_increase)
 211                 m_speed.X -= max_increase;
 212         else if(m_speed.X < target_speed.X)
 213                 m_speed.X = target_speed.X;
 214         else if(m_speed.X > target_speed.X)
 215                 m_speed.X = target_speed.X;
 216
 217         if(m_speed.Z < target_speed.Z - max_increase)
 218                 m_speed.Z += max_increase;
 219         else if(m_speed.Z > target_speed.Z + max_increase)
 220                 m_speed.Z -= max_increase;
 221         else if(m_speed.Z < target_speed.Z)
 222                 m_speed.Z = target_speed.Z;
 223         else if(m_speed.Z > target_speed.Z)
 224                 m_speed.Z = target_speed.Z;
 225 }
 226
 227 /*
 228         RemotePlayer
 229 */
 230
 231 RemotePlayer::RemotePlayer(
 232                 scene::ISceneNode* parent,
 233                 IrrlichtDevice *device,
 234                 s32 id):
 235         scene::ISceneNode(parent, (device==NULL)?NULL:device->getSceneManager(), id),
 236         m_text(NULL)
 237 {
 238         m_box = core::aabbox3d<f32>(-BS/2,0,-BS/2,BS/2,BS*2,BS/2);
 239
 240         if(parent != NULL && device != NULL)
 241         {
 242                 // ISceneNode stores a member called SceneManager
 243                 scene::ISceneManager* mgr = SceneManager;
 244                 video::IVideoDriver* driver = mgr->getVideoDriver();
 245                 gui::IGUIEnvironment* gui = device->getGUIEnvironment();
 246
 247                 // Add a text node for showing the name
 248                 wchar_t wname[1] = {0};
 249                 m_text = mgr->addTextSceneNode(gui->getBuiltInFont(),
 250                                 wname, video::SColor(255,255,255,255), this);
 251                 m_text->setPosition(v3f(0, (f32)BS*2.1, 0));
 252
 253                 // Attach a simple mesh to the player for showing an image
 254                 scene::SMesh *mesh = new scene::SMesh();
 255                 { // Front
 256                 scene::IMeshBuffer *buf = new scene::SMeshBuffer();
 257                 video::SColor c(255,255,255,255);
 258                 video::S3DVertex vertices[4] =
 259                 {
 260                         video::S3DVertex(-BS/2,0,0, 0,0,0, c, 0,1),
 261                         video::S3DVertex(BS/2,0,0, 0,0,0, c, 1,1),
 262                         video::S3DVertex(BS/2,BS*2,0, 0,0,0, c, 1,0),
 263                         video::S3DVertex(-BS/2,BS*2,0, 0,0,0, c, 0,0),
 264                 };
 265                 u16 indices[] = {0,1,2,2,3,0};
 266                 buf->append(vertices, 4, indices, 6);
 267                 // Set material
 268                 buf->getMaterial().setFlag(video::EMF_LIGHTING, false);
 269                 //buf->getMaterial().setFlag(video::EMF_BACK_FACE_CULLING, false);
 270                 buf->getMaterial().setTexture(0, driver->getTexture("../data/player.png"));
 271                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, false);
 272                 //buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 273                 buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 274                 // Add to mesh
 275                 mesh->addMeshBuffer(buf);
 276                 buf->drop();
 277                 }
 278                 { // Back
 279                 scene::IMeshBuffer *buf = new scene::SMeshBuffer();
 280                 video::SColor c(255,255,255,255);
 281                 video::S3DVertex vertices[4] =
 282                 {
 283                         video::S3DVertex(BS/2,0,0, 0,0,0, c, 1,1),
 284                         video::S3DVertex(-BS/2,0,0, 0,0,0, c, 0,1),
 285                         video::S3DVertex(-BS/2,BS*2,0, 0,0,0, c, 0,0),
 286                         video::S3DVertex(BS/2,BS*2,0, 0,0,0, c, 1,0),
 287                 };
 288                 u16 indices[] = {0,1,2,2,3,0};
 289                 buf->append(vertices, 4, indices, 6);
 290                 // Set material
 291                 buf->getMaterial().setFlag(video::EMF_LIGHTING, false);
 292                 //buf->getMaterial().setFlag(video::EMF_BACK_FACE_CULLING, false);
 293                 buf->getMaterial().setTexture(0, driver->getTexture("../data/player_back.png"));
 294                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, false);
 295                 buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 296                 // Add to mesh
 297                 mesh->addMeshBuffer(buf);
 298                 buf->drop();
 299                 }
 300                 scene::IMeshSceneNode *node = mgr->addMeshSceneNode(mesh, this);
 301                 mesh->drop();
 302                 node->setPosition(v3f(0,0,0));
 303         }
 304 }
 305
 306 RemotePlayer::~RemotePlayer()
 307 {
 308         if(SceneManager != NULL)
 309                 ISceneNode::remove();
 310 }
 311
 312 void RemotePlayer::updateName(const char *name)
 313 {
 314         Player::updateName(name);
 315         if(m_text != NULL)
 316         {
 317                 wchar_t wname[PLAYERNAME_SIZE];
 318                 mbstowcs(wname, m_name, strlen(m_name)+1);
 319                 m_text->setText(wname);
 320         }
 321 }
 322
 323 /*
 324         LocalPlayer
 325 */
 326
 327 LocalPlayer::LocalPlayer()
 328 {
 329 }
 330
 331 LocalPlayer::~LocalPlayer()
 332 {
 333 }
 334
 335 void LocalPlayer::applyControl(float dtime)
 336 {
 337         // Random constants
 338 #define WALK_ACCELERATION (4.0 * BS)
 339 #define WALKSPEED_MAX (4.0 * BS)
 340         f32 walk_acceleration = WALK_ACCELERATION;
 341         f32 walkspeed_max = WALKSPEED_MAX;
 342
 343         setPitch(control.pitch);
 344         setYaw(control.yaw);
 345
 346         v3f move_direction = v3f(0,0,1);
 347         move_direction.rotateXZBy(getYaw());
 348
 349         v3f speed = v3f(0,0,0);
 350
 351         // Superspeed mode
 352         bool superspeed = false;
 353         if(control.superspeed)
 354         {
 355                 speed += move_direction;
 356                 superspeed = true;
 357         }
 358
 359         if(control.up)
 360         {
 361                 speed += move_direction;
 362         }
 363         if(control.down)
 364         {
 365                 speed -= move_direction;
 366         }
 367         if(control.left)
 368         {
 369                 speed += move_direction.crossProduct(v3f(0,1,0));
 370         }
 371         if(control.right)
 372         {
 373                 speed += move_direction.crossProduct(v3f(0,-1,0));
 374         }
 375         if(control.jump)
 376         {
 377                 if(touching_ground)
 378                 {
 379                         v3f speed = getSpeed();
 380                         speed.Y = 6.5*BS;
 381                         setSpeed(speed);
 382                 }
 383                 else if(in_water)
 384                 {
 385                         v3f speed = getSpeed();
 386                         speed.Y = 2.0*BS;
 387                         setSpeed(speed);
 388                 }
 389         }
 390
 391         // The speed of the player (Y is ignored)
 392         if(superspeed)
 393                 speed = speed.normalize() * walkspeed_max * 5;
 394         else
 395                 speed = speed.normalize() * walkspeed_max;
 396
 397         f32 inc = walk_acceleration * BS * dtime;
 398
 399         // Accelerate to target speed with maximum increment
 400         accelerate(speed, inc);
 401 }
 402
 403