Now the tunnel works

Also don't allow setting next direction to the current direction.

core/src/com/me/pacman/entity/MovableEntity.java

@@ -11,7 +11,7 @@ public abstract class MovableEntity extends Entity {
     public Direction currDirection;
     private float tolerance;
 
-    public Direction nextDirection = null;
+    private Direction nextDirection = null;
     public boolean canMove = true;
 
     public MovableEntity(LevelState state, float x, float y, float speed, boolean moving, Direction currDirection, float turnTolerance) {
@@ -29,34 +29,51 @@ public abstract class MovableEntity extends Entity {
             return;
         }
 
+        LevelTile nextTile = null;
+
         if (nextDirection != null) {
-            LevelTile nextComponent;
             boolean turned = false;
             switch (nextDirection) {
                 case NORTH:
-                    nextComponent = state.level.getTile(x, y + 1f);
+                    nextTile = state.level.getTile(x, y + 1f);
-                    if (nextComponent.isPassable() && Math.abs(x - ((int) x + 0.5f)) <= tolerance) {
+                    if (nextTile == null) {
+                        if (currDirection == Direction.SOUTH) {
+                            turned = true;
+                        }
+                    } else if (nextTile.isPassable() && Math.abs(x - ((int) x + 0.5f)) <= tolerance) {
                         x = ((int) x) + 0.5f;
                         turned = true;
                     }
                     break;
                 case EAST:
-                    nextComponent = state.level.getTile(x + 1f, y);
+                    nextTile = state.level.getTile(x + 1f, y);
-                    if (nextComponent.isPassable() && Math.abs(y - ((int) y + 0.5f)) <= tolerance) {
+                    if (nextTile == null) {
+                        if (currDirection == Direction.WEST) {
+                            turned = true;
+                        }
+                    } else if (nextTile.isPassable() && Math.abs(y - ((int) y + 0.5f)) <= tolerance) {
                         y = ((int) y) + 0.5f;
                         turned = true;
                     }
                     break;
                 case SOUTH:
-                    nextComponent = state.level.getTile(x, y - 1f);
+                    nextTile = state.level.getTile(x, y - 1f);
-                    if (nextComponent.isPassable() && Math.abs(x - ((int) x + 0.5f)) <= tolerance) {
+                    if (nextTile == null) {
+                        if (currDirection == Direction.NORTH) {
+                            turned = true;
+                        }
+                    } else if (nextTile.isPassable() && Math.abs(x - ((int) x + 0.5f)) <= tolerance) {
                         x = ((int) x) + 0.5f;
                         turned = true;
                     }
                     break;
                 case WEST:
-                    nextComponent = state.level.getTile(x - 1f, y);
+                    nextTile = state.level.getTile(x - 1f, y);
-                    if (nextComponent.isPassable() && Math.abs(y - ((int) y + 0.5f)) <= tolerance) {
+                    if (nextTile == null) {
+                        if (currDirection == Direction.EAST) {
+                            turned = true;
+                        }
+                    } else if (nextTile.isPassable() && Math.abs(y - ((int) y + 0.5f)) <= tolerance) {
                         y = ((int) y) + 0.5f;
                         turned = true;
                     }
@@ -69,34 +86,68 @@ public abstract class MovableEntity extends Entity {
         }
 
         float dist = speed * dt;
+
+        LevelTile currentTile = state.level.getTile(x, y);
+        nextTile = null;
+
         float new_y = y;
         float new_x = x;
 
         switch (currDirection) {
             case NORTH:
+                if (currentTile == null && y > state.level.height + 1) {
+                    new_y = -1f;
+                    canMove = true;
+                } else {
                     new_y += dist;
-                canMove = state.level.getTile(new_x, new_y + 0.5f).isPassable();
+                    nextTile = state.level.getTile(new_x, new_y + 0.5f);
+                    canMove = nextTile == null || nextTile.isPassable();
+                }
                 break;
             case EAST:
+                if (currentTile == null && x > state.level.width + 1) {
+                    new_x = -1f;
+                    canMove = true;
+                } else {
                     new_x += dist;
-                canMove = state.level.getTile(new_x + 0.5f, new_y).isPassable();
+                    nextTile = state.level.getTile(new_x + 0.5f, new_y);
+                    canMove = nextTile == null || nextTile.isPassable();
+                }
                 break;
             case SOUTH:
+                if (currentTile == null && y < 0) {
+                    new_y = state.level.height + 1;
+                    canMove = true;
+                } else {
                     new_y -= dist;
-                canMove = state.level.getTile(new_x, new_y - 0.5f).isPassable();
+                    nextTile = state.level.getTile(new_x, new_y - 0.5f);
+                    canMove = nextTile == null || nextTile.isPassable();
+                }
                 break;
             case WEST:
+                if (currentTile == null && x < 0) {
+                    new_x = state.level.width + 1;
+                    canMove = true;
+                } else {
                     new_x -= dist;
-                canMove = state.level.getTile(new_x - 0.5f, new_y).isPassable();
+                    nextTile = state.level.getTile(new_x - 0.5f, new_y);
+                    canMove = nextTile == null || nextTile.isPassable();
+                }
                 break;
         }
 
-        // if move wasn't going to collide with wall, move normally.
+        // if move isn't going to collide with wall, move normally.
         // otherwise, trim would-be decimal and center entity on tile
         x = canMove? new_x : ((int) new_x) + 0.5f;
         y = canMove? new_y : ((int) new_y) + 0.5f;
     }
 
+    public void setNextDirection(Direction direction) {
+        if (direction != currDirection) {
+            nextDirection = direction;
+        }
+    }
+
     public enum Direction {
         NORTH,
         EAST,

core/src/com/me/pacman/state/PlayState.java

@@ -157,16 +157,16 @@ public class PlayState extends LevelState {
         public boolean keyDown(int keycode) {
             switch (keycode) {
                 case Input.Keys.UP:
-                    pacman.nextDirection = MovableEntity.Direction.NORTH;
+                    pacman.setNextDirection(MovableEntity.Direction.NORTH);
                     break;
                 case Input.Keys.DOWN:
-                    pacman.nextDirection = MovableEntity.Direction.SOUTH;
+                    pacman.setNextDirection(MovableEntity.Direction.SOUTH);
                     break;
                 case Input.Keys.LEFT:
-                    pacman.nextDirection = MovableEntity.Direction.WEST;
+                    pacman.setNextDirection(MovableEntity.Direction.WEST);
                     break;
                 case Input.Keys.RIGHT:
-                    pacman.nextDirection = MovableEntity.Direction.EAST;
+                    pacman.setNextDirection(MovableEntity.Direction.EAST);
                     break;
                 case Input.Keys.P:
                     paused = !paused;