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

   1 package ru.deadsoftware.cavecraft.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.cavecraft.CaveGame;
   8 import ru.deadsoftware.cavecraft.game.mobs.Mob;
   9 import ru.deadsoftware.cavecraft.game.objects.Drop;
  10 import ru.deadsoftware.cavecraft.game.objects.Player;
  11
  12 import java.util.Iterator;
  13
  14 class GamePhysics {
  15
  16     static final int PL_SPEED = 2;
  17
  18     private GameProc gp;
  19
  20     private Vector2 gravity;
  21
  22     GamePhysics(GameProc gp) {
  23         this.gp = gp;
  24         gravity = new Vector2(0, .9f);
  25     }
  26
  27     private boolean checkJump(Rectangle rect, int dir) {
  28         int bl;
  29         switch (dir) {
  30             case 0:
  31                 bl = gp.world.getForeMap((int) ((rect.x - 8) / 16), (int) ((rect.y + rect.height - 8) / 16));
  32                 if (checkColl(new Rectangle(rect.x - 8, rect.y - 18, rect.width, rect.height))) bl = 0;
  33                 break;
  34             case 1:
  35                 bl = gp.world.getForeMap((int) ((rect.x + rect.width + 8) / 16), (int) ((rect.y + rect.height - 8) / 16));
  36                 if (checkColl(new Rectangle(rect.x + rect.width + 8, rect.y - 18, rect.width, rect.height))) bl = 0;
  37                 break;
  38             default:
  39                 bl = 0;
  40         }
  41         return (bl > 0 && GameItems.getBlock(bl).toJump() &&
  42                 (rect.y + rect.height) - GameItems.getBlock(bl).getRect((int) ((rect.x - 8) / 16), (int) ((rect.y + rect.height - 8) / 16)).y > 8);
  43     }
  44
  45     private boolean checkColl(Rectangle rect) {
  46         int bl;
  47         int minX = (int) ((rect.x + rect.width / 2) / 16) - 4;
  48         int minY = (int) ((rect.y + rect.height / 2) / 16) - 4;
  49         int maxX = (int) ((rect.x + rect.width / 2) / 16) + 4;
  50         int maxY = (int) ((rect.y + rect.height / 2) / 16) + 4;
  51         if (minY < 0) minY = 0;
  52         if (maxY > gp.world.getHeight()) maxY = gp.world.getHeight();
  53         for (int y = minY; y < maxY; y++) {
  54             for (int x = minX; x < maxX; x++) {
  55                 bl = gp.world.getForeMap(x, y);
  56                 if (bl > 0 && GameItems.getBlock(bl).hasCollision()) {
  57                     if (Intersector.overlaps(rect, GameItems.getBlock(bl).getRect(x, y))) {
  58                         return true;
  59                     }
  60                 }
  61             }
  62         }
  63         return false;
  64     }
  65
  66     private int getBlock(Rectangle rect) {
  67         return gp.world.getForeMap((int) (rect.x + rect.width / 2) / 16, (int) (rect.y + rect.height / 8 * 7) / 16);
  68     }
  69
  70     private void dropPhy(Drop drop) {
  71         if (drop.closeToPlayer(gp) > 0) {
  72             drop.moveToPlayer(gp);
  73         } else {
  74             if (drop.move.x >= .5f) drop.move.x -= .5f;
  75             else if (drop.move.x <= -.5f) drop.move.x += .5f;
  76             else drop.move.x = 0;
  77             if (drop.move.y < 9) drop.move.y += gravity.y / 4;
  78         }
  79         drop.pos.add(drop.move);
  80         if (drop.pos.x + 8 > gp.world.getWidthPx()) drop.pos.x -= gp.world.getWidthPx();
  81         else if (drop.pos.x < 0) drop.pos.x += gp.world.getWidthPx();
  82         drop.pos.y = MathUtils.round(drop.pos.y);
  83         while (checkColl(drop.getRect())) {
  84             drop.pos.y--;
  85             drop.move.y = 0;
  86         }
  87     }
  88
  89     private void mobXColl(Mob mob) {
  90         if (checkColl(mob.getRect())) {
  91             if (mob.canJump && !mob.flyMode) {
  92                 mob.pos.y -= 8;
  93             }
  94             if (checkColl(mob.getRect())) {
  95                 if (mob.canJump && !mob.flyMode) mob.pos.y += 8;
  96                 int d = 0;
  97                 if (mob.mov.x < 0) d = 1;
  98                 else if (mob.mov.x > 0) d = -1;
  99                 mob.pos.x = MathUtils.round(mob.pos.x);
 100                 while (checkColl(mob.getRect())) mob.pos.x += d;
 101                 if (mob.canJump) mob.changeDir();
 102             }
 103         }
 104         if (mob.pos.x + mob.getWidth() / 2 < 0) mob.pos.x += gp.world.getWidthPx();
 105         if (mob.pos.x + mob.getWidth() / 2 > gp.world.getWidthPx()) mob.pos.x -= gp.world.getWidthPx();
 106     }
 107
 108     private void mobYColl(Mob mob) {
 109         if (checkColl(mob.getRect())) {
 110             int d = -1;
 111             if (mob.mov.y < 0) d = 1;
 112             if (d == -1) {
 113                 mob.canJump = true;
 114                 mob.flyMode = false;
 115             }
 116             mob.pos.y = MathUtils.round(mob.pos.y);
 117             while (checkColl(mob.getRect())) mob.pos.y += d;
 118             mob.mov.y = 0;
 119             if (mob.getType() > 0) {
 120                 gp.world.setForeMap(mob.getMapX(), mob.getMapY(), mob.getType());
 121                 mob.kill();
 122             }
 123         } else {
 124             mob.canJump = false;
 125         }
 126         if (mob.pos.y > gp.world.getHeightPx()) {
 127             mob.kill();
 128         }
 129     }
 130
 131     private void playerPhy(Player pl) {
 132         pl.pos.y += pl.mov.y;
 133         mobYColl(pl);
 134
 135         if (GameItems.isFluid(getBlock(pl.getRect()))) {
 136             if (CaveGame.TOUCH && pl.mov.x != 0 && !pl.swim && !pl.flyMode) pl.swim = true;
 137             if (!pl.swim) {
 138                 if (!pl.flyMode && pl.mov.y < 4.5f) pl.mov.add(gravity.x / 4, gravity.y / 4);
 139                 if (!pl.flyMode && pl.mov.y > 4.5f) pl.mov.add(0, -1f);
 140             } else {
 141                 pl.mov.add(0, -.5f);
 142                 if (pl.mov.y < -3) pl.mov.y = -3;
 143             }
 144         } else {
 145             if (!pl.flyMode && pl.mov.y < 18) pl.mov.add(gravity);
 146         }
 147
 148         pl.pos.x += pl.mov.x;
 149         mobXColl(pl);
 150
 151         if (CaveGame.TOUCH && checkJump(pl.getRect(), pl.getDir()) && !pl.flyMode && pl.canJump && pl.mov.x != 0) {
 152             pl.mov.add(0, -8);
 153             pl.canJump = false;
 154         }
 155     }
 156
 157     private void mobPhy(Mob mob) {
 158         mob.pos.y += mob.mov.y;
 159         mobYColl(mob);
 160
 161         if (mob.getType() == 0 && GameItems.isFluid(getBlock(mob.getRect()))) {
 162             if (mob.mov.y > 9) mob.mov.add(0, -.9f);
 163             mob.mov.add(0, -.5f);
 164             if (mob.mov.y < -3) mob.mov.y = -3;
 165         } else if (!mob.flyMode && mob.mov.y < 18) mob.mov.add(gravity);
 166
 167         mob.pos.x += mob.mov.x;
 168         mobXColl(mob);
 169
 170         if (checkJump(mob.getRect(), mob.getDir()) && mob.canJump && mob.mov.x != 0) {
 171             mob.mov.add(0, -8);
 172             mob.canJump = false;
 173         }
 174     }
 175
 176     void update(float delta) {
 177         //TODO use delta time
 178         for (Iterator<Drop> it = gp.drops.iterator(); it.hasNext(); ) {
 179             Drop drop = it.next();
 180             dropPhy(drop);
 181             if (Intersector.overlaps(drop.getRect(), gp.player.getRect())) drop.pickUpDrop(gp.player);
 182             if (drop.pickedUp) it.remove();
 183         }
 184
 185         for (Iterator<Mob> it = gp.mobs.iterator(); it.hasNext(); ) {
 186             Mob mob = it.next();
 187             mob.ai();
 188             mobPhy(mob);
 189             if (mob.isDead()) it.remove();
 190         }
 191
 192         playerPhy(gp.player);
 193         if (gp.player.isDead()) gp.player.respawn(gp.world);
 194
 195         gp.renderer.setCamPos(
 196                 gp.player.pos.x + gp.player.getWidth() / 2 - gp.renderer.getWidth() / 2,
 197                 gp.player.pos.y + gp.player.getHeight() / 2 - gp.renderer.getHeight() / 2);
 198     }
 199
 200 }