Game Development Reference
In-Depth Information
listener.coin();
score += Coin.
COIN_SCORE
;
}
}
if
(bob.velocity.y > 0)
return
;
len = springs.size();
for
(
int
i = 0; i < len; i++) {
Spring spring = springs.get(i);
if
(bob.position.y > spring.position.y) {
if
(OverlapTester.
overlapRectangles
(bob.bounds, spring.bounds)) {
bob.hitSpring();
listener.highJump();
}
}
}
}
The
checkItemCollisions()
method checks Bob against all coins in the world and against all
springs. If Bob hits a coin, we remove the coin from our world, tell the listener that a coin was
collected, and increase the current score by
COIN_SCORE
. If Bob is falling downward, we also
check Bob against all springs in the world. If he hits one, we tell him about it so that he'll perform
a higher jump than usual. We also inform the listener of this event.
private void
checkCastleCollisions() {
if
(OverlapTester.
overlapRectangles
(castle.bounds, bob.bounds)) {
state = WORLD_STATE_NEXT_LEVEL;
}
}
The final method checks Bob against the castle. If Bob hits it, we set the world's state to
WORLD_STATE_NEXT_LEVEL
, signaling any outside entity (such as our game screen) that we should
transition to the next level, which will again be a randomly generated instance of
World
.
Game Over, Buddy!
The last method in the
World
class, which is invoked in the last line of the
World.update()
method, is shown in Listing 9-19.
Listing 9-19. The Rest of World.java; the Game Over-Checking Method
private void
checkGameOver() {
if
(heightSoFar - 7.5f > bob.position.y) {
state =
WORLD
_
STATE
_
GAME
_
OVER
;
}
}
}
