슈팅게임 만들기 #4

학습목표

소행성 충돌 테스트

asteroids.dart

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

...
typedef CheckCollisionCallback = bool Function(GameControl target);

class Asteroids extends GameControl {
  final CheckCollisionCallback onCheckCollision;

  Asteroids({required this.onCheckCollision});

  void _createAsteroid(Size size) {
    var _x = _random.nextDouble() * (size.width - ASTEROID_SIZE);
    getGameControlGroup()?.addControl(Asteroid(_x, 0, onCheckCollision));
  }
  ...
}

class Asteroid extends GameControl {
  Asteroid(double ax, double ay, CheckCollisionCallback onCheckCollision)
  {
    ...
    _onCheckCollision = onCheckCollision;
  }

  @override
  void tick(Canvas canvas, Size size, int current, int term) {
    ...
    if (_onCheckCollision != null) {
      if (_onCheckCollision!(this)) deleted = true;
    }
  }

  double _speed = 2;
  CheckCollisionCallback? _onCheckCollision;
}

ship.dart

1
2
3
4
5
6
7
8
9
10

...
class Ship extends GameControl {
  ...
  bool checkCollisionAndExplode(GameControl target) {
    var result = checkCollision(target);
    if (result) deleted = true;
    return result;
  }
  ...
}

space_ship.dart

1
2
3
4
5
6
7
8
9
10
11
12
13
14

...
class SpaceShip extends StatelessWidget {
  SpaceShip({Key? key}) : super(key: key) {
    ...
    _asteroids = Asteroids(
      onCheckCollision: (GameControl target) {
        return _ship.checkCollisionAndExplode(target);
      }
    );
    ...
  }
  ...
}