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;
  11 import ru.deadsoftware.cavedroid.game.objects.Drop;
  12 import ru.deadsoftware.cavedroid.game.objects.DropController;
  13 import ru.deadsoftware.cavedroid.game.world.GameWorld;
  14
  15 import javax.inject.Inject;
  16 import java.util.Iterator;
  17
  18
  19 @GameScope
  20 public class GamePhysics {
  21
  22     public static final float PL_SPEED = 69.072f;
  23     public static final float PL_JUMP_VELOCITY = -133.332f;
  24     public static final float PL_TERMINAL_VELOCITY = 1254.4f;
  25
  26     private final Vector2 gravity = new Vector2(0, 444.44f);
  27
  28     private final GameWorld mGameWorld;
  29     private final MainConfig mMainConfig;
  30     private final MobsController mMobsController;
  31     private final DropController mDropController;
  32
  33     @Inject
  34     public GamePhysics(GameWorld gameWorld,
  35                        MainConfig mainConfig,
  36                        MobsController mobsController,
  37                        DropController dropController) {
  38         mGameWorld = gameWorld;
  39         mMainConfig = mainConfig;
  40         mMobsController = mobsController;
  41         mDropController = dropController;
  42     }
  43
  44     /**
  45      * Checks if mob should jump
  46      *
  47      * @return true if mob should jump
  48      */
  49     private boolean checkJump(Mob mob) {
  50         int dir = mob.looksLeft() ? 0 : 1;
  51         int blX = (int) (mob.getX() + mob.getWidth() * dir - 8 + 16 * dir);
  52         int blY = (int) (mob.getY() + mob.getHeight() - 8);
  53         int block = mGameWorld.getForeMap(blX / 16, blY / 16);
  54
  55         if (checkColl(new Rectangle(blX, mob.getY() - 18, mob.getWidth(), mob.getHeight()))) {
  56             block = 0;
  57         }
  58
  59         return (block > 0 && GameItems.getBlock(block).toJump() &&
  60                 (mob.getY() + mob.getHeight()) - GameItems.getBlock(block).getRectangle(blX / 16, blY / 16).y > 8);
  61     }
  62
  63     private boolean checkColl(Rectangle rect) {
  64         int minX = (int) ((rect.x + rect.width / 2) / 16) - 4;
  65         int minY = (int) ((rect.y + rect.height / 2) / 16) - 4;
  66         int maxX = (int) ((rect.x + rect.width / 2) / 16) + 4;
  67         int maxY = (int) ((rect.y + rect.height / 2) / 16) + 4;
  68
  69         if (minY < 0) {
  70             minY = 0;
  71         }
  72
  73         if (maxY > mGameWorld.getHeight()) {
  74             maxY = mGameWorld.getHeight();
  75         }
  76
  77         int block;
  78         for (int y = minY; y < maxY; y++) {
  79             for (int x = minX; x < maxX; x++) {
  80                 block = mGameWorld.getForeMap(x, y);
  81                 if (block > 0 && GameItems.getBlock(block).hasCollision()) {
  82                     if (Intersector.overlaps(rect, GameItems.getBlock(block).getRectangle(x, y))) {
  83                         return true;
  84                     }
  85                 }
  86             }
  87         }
  88
  89         return false;
  90     }
  91
  92     private int getBlock(Rectangle rect) {
  93         return mGameWorld.getForeMap((int) (rect.x + rect.width / 2) / 16,
  94                 (int) (rect.y + rect.height / 8 * 7) / 16);
  95     }
  96
  97     private void dropPhy(Drop drop, float delta) {
  98         int dropToPlayer = drop.closeToPlayer(mGameWorld, mMobsController.getPlayer());
  99         if (dropToPlayer > 0) {
 100             drop.moveToPlayer(mGameWorld, mMobsController.getPlayer(), dropToPlayer);
 101         } else {
 102             if (drop.getVelocity().x >= .5f) {
 103                 drop.getVelocity().x -= .5f;
 104             } else if (drop.getVelocity().x <= -.5f) {
 105                 drop.getVelocity().x += .5f;
 106             } else {
 107                 drop.getVelocity().x = 0;
 108             }
 109             if (drop.getVelocity().y < 9) {
 110                 drop.getVelocity().y += gravity.y / 4;
 111             }
 112         }
 113         drop.move(delta);
 114
 115
 116         if (checkColl(drop)) {
 117             drop.getVelocity().set(0, -1);
 118             do {
 119                 drop.move(delta);
 120             } while (checkColl(drop));
 121             drop.getVelocity().setZero();
 122         }
 123     }
 124
 125     private void mobXColl(Mob mob) {
 126         if (checkColl(mob)) {
 127             if (mob.canJump() && !mob.isFlyMode()) {
 128                 mob.y -= 8;
 129             }
 130
 131             if (checkColl(mob)) {
 132                 if (mob.canJump() && !mob.isFlyMode()) {
 133                     mob.y += 8;
 134                 }
 135
 136                 int d = 0;
 137
 138                 if (mob.getVelocity().x < 0) {
 139                     d = 1;
 140                 } else if (mob.getVelocity().x > 0) {
 141                     d = -1;
 142                 }
 143
 144                 mob.x = MathUtils.round(mob.getX());
 145
 146                 while (checkColl(mob)) {
 147                     mob.x += d;
 148                 }
 149
 150                 if (mob.canJump()) {
 151                     mob.changeDir();
 152                 }
 153             }
 154         }
 155
 156         mob.checkWorldBounds(mGameWorld);
 157     }
 158
 159     private void mobYColl(Mob mob) {
 160         if (checkColl(mob)) {
 161             int d = -1;
 162
 163             if (mob.getVelocity().y < 0) {
 164                 d = 1;
 165             }
 166
 167             if (d == -1) {
 168                 mob.setCanJump(true);
 169                 mob.setFlyMode(false);
 170             }
 171
 172             mob.y = MathUtils.round(mob.getY());
 173
 174             while (checkColl(mob)) {
 175                 mob.y += d;
 176             }
 177
 178             mob.getVelocity().y = 0;
 179
 180
 181
 182             //todo fall damage
 183             // h = (v^2) / 2g
 184             // dmg = max(0, (h - 48) / 32) - half of blocks fallen starting from 3 blocks height
 185             //                int dmg = ((int)Math.max(0f, (((mob.getVelocity().y * mob.getVelocity().y) / (2 * gravity.y)) - 48f) / 16f));
 186             //                if (dmg > 0) System.out.println("Damage: " + dmg);
 187
 188         } else {
 189             mob.y += 1;
 190             mob.setCanJump(checkColl(mob));
 191             mob.y -= 1;
 192         }
 193
 194         if (mob.getY() > mGameWorld.getHeightPx()) {
 195             mob.kill();
 196         }
 197     }
 198
 199     private void playerPhy(Player player, float delta) {
 200         if (player.isDead()) {
 201             return;
 202         }
 203
 204         if (GameItems.isFluid(getBlock(player))) {
 205             if (mMainConfig.isTouch() && player.getVelocity().x != 0 && !player.swim && !player.isFlyMode()) {
 206                 player.swim = true;
 207             }
 208             if (!player.swim) {
 209                 if (!player.isFlyMode() && player.getVelocity().y < 32f) {
 210                     player.getVelocity().y += gravity.y * delta;
 211                 }
 212                 if (!player.isFlyMode() && player.getVelocity().y > 32f) {
 213                     player.getVelocity().y -= player.getVelocity().y * 32f * delta;
 214                 }
 215             } else {
 216                 player.getVelocity().y += PL_JUMP_VELOCITY * delta;
 217                 if (player.getVelocity().y < -PL_SPEED) {
 218                     player.getVelocity().y = -PL_SPEED;
 219                 }
 220             }
 221         } else {
 222             if (!player.isFlyMode() && player.getVelocity().y < PL_TERMINAL_VELOCITY) {
 223                 player.getVelocity().y += gravity.y * delta;
 224             }
 225         }
 226
 227         player.y += player.getVelocity().y * delta;
 228         mobYColl(player);
 229
 230         player.x += player.getVelocity().x * (player.isFlyMode() ? 1.5f : 1) *
 231                 (GameItems.isFluid(getBlock(player)) && !player.isFlyMode() ? .8f : 1) * delta;
 232
 233         mobXColl(player);
 234
 235         if (mMainConfig.isTouch() && !player.isFlyMode() && player.canJump() && player.getVelocity().x != 0 && checkJump(player)) {
 236             player.getVelocity().y = PL_JUMP_VELOCITY;
 237             player.setCanJump(false);
 238         }
 239     }
 240
 241     private void mobPhy(Mob mob, float delta) {
 242         if (mob.getType() == Mob.Type.MOB && GameItems.isFluid(getBlock(mob))) {
 243             if (mob.getVelocity().y > 32f) {
 244                 mob.getVelocity().y -= mob.getVelocity().y * 32f * delta;
 245             }
 246
 247             mob.getVelocity().y += PL_JUMP_VELOCITY * delta;
 248
 249             if (mob.getVelocity().y < -PL_SPEED) {
 250                 mob.getVelocity().y = -PL_SPEED;
 251             }
 252         } else if (!mob.isFlyMode() && mob.getVelocity().y < PL_TERMINAL_VELOCITY) {
 253             mob.getVelocity().y += gravity.y * delta;
 254         }
 255
 256         mob.y += mob.getVelocity().y * delta;
 257         mobYColl(mob);
 258
 259         if (mob.isDead()) {
 260             return;
 261         }
 262
 263         mob.x += mob.getVelocity().x * delta;
 264         mobXColl(mob);
 265
 266         if (mob.canJump() && mob.getVelocity().x != 0 && checkJump(mob)) {
 267             mob.getVelocity().y = PL_JUMP_VELOCITY;
 268             mob.setCanJump(false);
 269         }
 270     }
 271
 272     void update(float delta) {
 273         Player player = mMobsController.getPlayer();
 274
 275         for (Iterator<Drop> it = mDropController.getIterator(); it.hasNext(); ) {
 276             Drop drop = it.next();
 277             dropPhy(drop, delta);
 278             if (Intersector.overlaps(drop, player)) {
 279                 drop.pickUpDrop(player);
 280             }
 281             if (drop.isPickedUp()) {
 282                 it.remove();
 283             }
 284         }
 285
 286         for (Iterator<Mob> it = mMobsController.getIterator(); it.hasNext(); ) {
 287             Mob mob = it.next();
 288             mob.ai(mGameWorld, delta);
 289             mobPhy(mob, delta);
 290             if (mob.isDead()) {
 291                 it.remove();
 292             }
 293         }
 294
 295         playerPhy(player, delta);
 296         if (player.isDead()) {
 297             player.respawn(mGameWorld);
 298         }
 299     }
 300
 301 }