core/src/ru/deadsoftware/cavedroid/game/GamePhysics.java

   1 package ru.deadsoftware.cavedroid.game;
   2
   3 import com.badlogic.gdx.math.Intersector;
   4 import com.badlogic.gdx.math.MathUtils;
   5 import com.badlogic.gdx.math.Rectangle;
   6 import com.badlogic.gdx.math.Vector2;
   7 import ru.deadsoftware.cavedroid.MainConfig;
   8 import ru.deadsoftware.cavedroid.game.mobs.Mob;
   9 import ru.deadsoftware.cavedroid.game.mobs.MobsController;
  10 import ru.deadsoftware.cavedroid.game.mobs.player.Player;
  11 import ru.deadsoftware.cavedroid.game.model.block.Block;
  12 import ru.deadsoftware.cavedroid.game.objects.Drop;
  13 import ru.deadsoftware.cavedroid.game.objects.DropController;
  14 import ru.deadsoftware.cavedroid.game.world.GameWorld;
  15
  16 import javax.annotation.CheckForNull;
  17 import javax.inject.Inject;
  18 import java.util.Iterator;
  19
  20
  21 @GameScope
  22 public class GamePhysics {
  23
  24     public static final float PL_JUMP_VELOCITY = -133.332f;
  25     public static final float PL_TERMINAL_VELOCITY = 1254.4f;
  26
  27     private final Vector2 gravity = new Vector2(0, 444.44f);
  28
  29     private final GameWorld mGameWorld;
  30     private final MainConfig mMainConfig;
  31     private final MobsController mMobsController;
  32     private final DropController mDropController;
  33     private final GameItemsHolder mGameItemsHolder;
  34
  35     @Inject
  36     public GamePhysics(GameWorld gameWorld,
  37                        MainConfig mainConfig,
  38                        MobsController mobsController,
  39                        DropController dropController,
  40                        GameItemsHolder gameItemsHolder) {
  41         mGameWorld = gameWorld;
  42         mMainConfig = mainConfig;
  43         mMobsController = mobsController;
  44         mDropController = dropController;
  45         mGameItemsHolder = gameItemsHolder;
  46     }
  47
  48     /**
  49      * Checks if mob should jump
  50      *
  51      * @return true if mob should jump
  52      */
  53     private boolean checkJump(Mob mob) {
  54         int dir = mob.looksLeft() ? 0 : 1;
  55         int blX = (int) (mob.getX() + mob.getWidth() * dir - 8 + 16 * dir);
  56         int blY = (int) (mob.getY() + mob.getHeight() - 8);
  57         Block block = mGameWorld.getForeMap(blX / 16, blY / 16);
  58
  59         if (checkColl(new Rectangle(blX, mob.getY() - 18, mob.getWidth(), mob.getHeight()))) {
  60             return false;
  61         }
  62
  63         return (block.toJump() &&
  64                 (mob.getY() + mob.getHeight()) - block.getRectangle(blX / 16, blY / 16).y > 8);
  65     }
  66
  67     private boolean checkColl(Rectangle rect) {
  68         int minX = (int) ((rect.x + rect.width / 2) / 16) - 4;
  69         int minY = (int) ((rect.y + rect.height / 2) / 16) - 4;
  70         int maxX = (int) ((rect.x + rect.width / 2) / 16) + 4;
  71         int maxY = (int) ((rect.y + rect.height / 2) / 16) + 4;
  72
  73         if (minY < 0) {
  74             minY = 0;
  75         }
  76
  77         if (maxY > mGameWorld.getHeight()) {
  78             maxY = mGameWorld.getHeight();
  79         }
  80
  81         Block block;
  82         for (int y = minY; y < maxY; y++) {
  83             for (int x = minX; x < maxX; x++) {
  84                 if (!mGameWorld.hasForeAt(x, y)) {
  85                     continue;
  86                 }
  87                 block = mGameWorld.getForeMap(x, y);
  88                 if (block.hasCollision()) {
  89                     if (Intersector.overlaps(rect, block.getRectangle(x, y))) {
  90                         return true;
  91                     }
  92                 }
  93             }
  94         }
  95
  96         return false;
  97     }
  98
  99     private Block getBlock(Rectangle rect) {
 100         return mGameWorld.getForeMap((int) (rect.x + rect.width / 2) / 16,
 101                 (int) (rect.y + rect.height / 8 * 7) / 16);
 102     }
 103
 104     private Rectangle getShiftedPlayerRect(float shift) {
 105         final Player player = mMobsController.getPlayer();
 106         return new Rectangle(player.x + shift, player.y, player.width, player.height);
 107     }
 108
 109     /**
 110      * @return Rectangle representing magneting target for this drop
 111      */
 112     @CheckForNull
 113     private Rectangle getShiftedMagnetingPlayerRect(Drop drop) {
 114         final Player player = mMobsController.getPlayer();
 115
 116         if (!player.inventory.canPickItem(drop.getItem())) {
 117             return null;
 118         }
 119
 120         if (drop.canMagnetTo(player)) {
 121             return getShiftedPlayerRect(0);
 122         }
 123
 124         final Rectangle shiftedLeft = getShiftedPlayerRect(-mGameWorld.getWidthPx());
 125         if (drop.canMagnetTo(shiftedLeft)) {
 126             return shiftedLeft;
 127         }
 128
 129         final Rectangle shiftedRight = getShiftedPlayerRect(mGameWorld.getWidthPx());
 130         if (drop.canMagnetTo(shiftedRight)) {
 131             return shiftedRight;
 132         }
 133
 134         return null;
 135     }
 136
 137     private void pickUpDropIfPossible(Rectangle shiftedPlayerTarget, Drop drop) {
 138         final Player player = mMobsController.getPlayer();
 139
 140         if (Intersector.overlaps(shiftedPlayerTarget, drop)) {
 141             player.inventory.pickDrop(drop);
 142         }
 143     }
 144
 145     private void dropPhy(Drop drop, float delta) {
 146         final Rectangle playerMagnetTarget = getShiftedMagnetingPlayerRect(drop);
 147         final Vector2 dropVelocity = drop.getVelocity();
 148
 149
 150         if (playerMagnetTarget != null) {
 151             final Vector2 magnetVector = new Vector2(playerMagnetTarget.x - drop.x,
 152                     playerMagnetTarget.y - drop.y);
 153             magnetVector.nor().scl(Drop.MAGNET_VELOCITY * delta);
 154             dropVelocity.add(magnetVector);
 155         } else {
 156             dropVelocity.y += gravity.y * delta;
 157         }
 158
 159         dropVelocity.x = MathUtils.clamp(dropVelocity.x, -Drop.MAGNET_VELOCITY, Drop.MAGNET_VELOCITY);
 160         dropVelocity.y = MathUtils.clamp(dropVelocity.y, -Drop.MAGNET_VELOCITY, Drop.MAGNET_VELOCITY);
 161
 162         drop.x += dropVelocity.x * delta;
 163         drop.y += dropVelocity.y * delta;
 164
 165         if (checkColl(drop)) {
 166             dropVelocity.setZero();
 167             do {
 168                 drop.y--;
 169             } while (checkColl(drop));
 170         }
 171
 172         if (playerMagnetTarget != null) {
 173             pickUpDropIfPossible(playerMagnetTarget, drop);
 174         }
 175     }
 176
 177     private void mobXColl(Mob mob) {
 178         if (checkColl(mob)) {
 179             if (mob.canJump() && !mob.isFlyMode()) {
 180                 mob.y -= 8;
 181             }
 182
 183             if (checkColl(mob)) {
 184                 if (mob.canJump() && !mob.isFlyMode()) {
 185                     mob.y += 8;
 186                 }
 187
 188                 int d = 0;
 189
 190                 if (mob.getVelocity().x < 0) {
 191                     d = 1;
 192                 } else if (mob.getVelocity().x > 0) {
 193                     d = -1;
 194                 }
 195
 196                 mob.x = MathUtils.round(mob.getX());
 197
 198                 while (checkColl(mob)) {
 199                     mob.x += d;
 200                 }
 201
 202                 if (mob.canJump()) {
 203                     mob.changeDir();
 204                 }
 205             }
 206         }
 207
 208         mob.checkWorldBounds(mGameWorld);
 209     }
 210
 211     private void mobYColl(Mob mob) {
 212         if (checkColl(mob)) {
 213             int d = -1;
 214
 215             if (mob.getVelocity().y < 0) {
 216                 d = 1;
 217             }
 218
 219             if (d == -1) {
 220                 mob.setCanJump(true);
 221                 mob.setFlyMode(false);
 222
 223                 int dmg = ((int)Math.max(0f, (((mob.getVelocity().y * mob.getVelocity().y) / (2 * gravity.y)) - 48f) / 16f));
 224                 if (dmg > 0) {
 225                     mob.damage(dmg);
 226                 }
 227             }
 228
 229             mob.y = MathUtils.round(mob.getY());
 230
 231             while (checkColl(mob)) {
 232                 mob.y += d;
 233             }
 234
 235             mob.getVelocity().y = 0;
 236
 237         } else {
 238             mob.y += 1;
 239             mob.setCanJump(checkColl(mob));
 240             mob.y -= 1;
 241         }
 242
 243         if (mob.getY() > mGameWorld.getHeightPx()) {
 244             mob.kill();
 245         }
 246     }
 247
 248     private void playerPhy(Player player, float delta) {
 249         if (player.isDead()) {
 250             return;
 251         }
 252
 253         if (getBlock(player).isFluid()) {
 254             if (mMainConfig.isTouch() && player.getVelocity().x != 0 && !player.swim && !player.isFlyMode()) {
 255                 player.swim = true;
 256             }
 257             if (!player.swim) {
 258                 if (!player.isFlyMode() && player.getVelocity().y < 32f) {
 259                     player.getVelocity().y += gravity.y * delta;
 260                 }
 261                 if (!player.isFlyMode() && player.getVelocity().y > 32f) {
 262                     player.getVelocity().y -= player.getVelocity().y * 32f * delta;
 263                 }
 264             } else {
 265                 player.getVelocity().y += PL_JUMP_VELOCITY * delta;
 266                 if (player.getVelocity().y < -player.getSpeed()) {
 267                     player.getVelocity().y = -player.getSpeed();
 268                 }
 269             }
 270         } else {
 271             if (!player.isFlyMode() && player.getVelocity().y < PL_TERMINAL_VELOCITY) {
 272                 player.getVelocity().y += gravity.y * delta;
 273             }
 274         }
 275
 276         player.y += player.getVelocity().y * delta;
 277         mobYColl(player);
 278
 279         player.x += player.getVelocity().x * (player.isFlyMode() ? 1.5f : 1) *
 280                 (getBlock(player).isFluid() && !player.isFlyMode() ? .8f : 1) * delta;
 281
 282         mobXColl(player);
 283
 284         if (mMainConfig.isTouch() && !player.isFlyMode() && player.canJump() && player.getVelocity().x != 0 && checkJump(player)) {
 285             player.jump();
 286             player.setCanJump(false);
 287         }
 288     }
 289
 290     private void mobPhy(Mob mob, float delta) {
 291         if (mob.getType() == Mob.Type.MOB && getBlock(mob).isFluid()) {
 292             if (mob.getVelocity().y > 32f) {
 293                 mob.getVelocity().y -= mob.getVelocity().y * 32f * delta;
 294             }
 295
 296             mob.getVelocity().y += PL_JUMP_VELOCITY * delta;
 297
 298             if (mob.getVelocity().y < -mob.getSpeed()) {
 299                 mob.getVelocity().y = -mob.getSpeed();
 300             }
 301         } else if (!mob.isFlyMode() && mob.getVelocity().y < PL_TERMINAL_VELOCITY) {
 302             mob.getVelocity().y += gravity.y * delta;
 303         }
 304
 305         mob.y += mob.getVelocity().y * delta;
 306         mobYColl(mob);
 307
 308         if (mob.isDead()) {
 309             return;
 310         }
 311
 312         mob.x += mob.getVelocity().x * delta;
 313         mobXColl(mob);
 314
 315         if (mob.canJump() && mob.getVelocity().x != 0 && checkJump(mob)) {
 316             mob.jump();
 317             mob.setCanJump(false);
 318         }
 319     }
 320
 321     void update(float delta) {
 322         Player player = mMobsController.getPlayer();
 323
 324         for (Iterator<Drop> it = mDropController.getIterator(); it.hasNext(); ) {
 325             Drop drop = it.next();
 326             dropPhy(drop, delta);
 327             if (drop.getPickedUp()) {
 328                 it.remove();
 329             }
 330         }
 331
 332         for (Iterator<Mob> it = mMobsController.getMobs().iterator(); it.hasNext(); ) {
 333             Mob mob = it.next();
 334             mob.ai(mGameWorld, mGameItemsHolder, delta);
 335             mobPhy(mob, delta);
 336             if (mob.isDead()) {
 337                 it.remove();
 338             }
 339         }
 340
 341         playerPhy(player, delta);
 342         player.ai(mGameWorld, mGameItemsHolder, delta);
 343         if (player.isDead()) {
 344             player.respawn(mGameWorld, mGameItemsHolder);
 345         }
 346     }
 347
 348 }