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