Question

我是box2d的新手，我正在开发小游戏。我的游戏中有不同的演员，如

敌人
播放器
背景
子弹

默认情况下，在box2d中，所有人体都相互碰撞。我想删除某些身体上的碰撞

敌人会与玩家发生碰撞。玩家将与敌人和地面相撞。背景不会与任何东西发生碰撞子弹只会与地面相撞。

我编写的代码如下所述

// Actor Util创建所有actor

公共类ActorUtils {

public static World createWorld() {
    return new World(Constants.WORLD_GRAVITY, true);
}

public static Body createGround(World world, float x, float y, float width, float height) {
    BodyDef bodyDef = new BodyDef();
    bodyDef.position.set(new Vector2(x, y));
    Body body = world.createBody(bodyDef);
    PolygonShape shape = new PolygonShape();
    shape.setAsBox(width, height);
    Fixture fixture = body.createFixture(shape, Constants.GROUND_DENSITY);

    Filter filterData = fixture.getFilterData();
    filterData.categoryBits = ActorMasking.CATEGORY_GROUND;
    filterData.maskBits = ActorMasking.MASK_GROUND;
    body.setUserData(new GroundUserData(Constants.GROUND_WIDTH, Constants.GROUND_HEIGHT));
    fixture.setFilterData(filterData);
    shape.dispose();
    return body;
}

public static Body createRunner(World world) {
    BodyDef bodyDef = new BodyDef();
    bodyDef.type = BodyDef.BodyType.DynamicBody;
    bodyDef.position.set(new Vector2(0, Constants.RUNNER_Y));
    PolygonShape shape = new PolygonShape();
    shape.setAsBox(Constants.RUNNER_WIDTH / 2, Constants.RUNNER_HEIGHT / 2);
    Body body = world.createBody(bodyDef);
    Fixture fixture = body.createFixture(shape, Constants.RUNNER_DENSITY);
    body.resetMassData();
    body.setUserData(new RunnerUserData(Constants.RUNNER_WIDTH, Constants.RUNNER_HEIGHT));


    Filter filterData = fixture.getFilterData();
    filterData.categoryBits = ActorMasking.CATEGORY_PLAYER;
    filterData.maskBits = ActorMasking.MASK_PLAYER;
    fixture.setFilterData(filterData);

    shape.dispose();
    return body;
}

public static Body createEnemy(World world) {
    EnemyType enemyType = RandomUtils.getRandomEnemyType();
    BodyDef bodyDef = new BodyDef();
    bodyDef.type = BodyDef.BodyType.KinematicBody;

    float minX = 25.0f;
    float maxX = 40f;

    float minY = 1.5f;
    float maxY = 14.0f;
    Random rand = new Random();

    float finalX = rand.nextFloat() * (maxX - minX) + minX;

    float finalY = rand.nextFloat() * (maxY - minY) + minY;

    bodyDef.position.set(new Vector2(/*enemyType.getX()*/finalX, /*enemyType.getY())*/finalY));
    PolygonShape shape = new PolygonShape();
    shape.setAsBox(enemyType.getWidth() / 2, enemyType.getHeight() / 2);
    Body body = world.createBody(bodyDef);
    Fixture fixture = body.createFixture(shape, enemyType.getDensity());
    body.resetMassData();
    EnemyUserData userData = new EnemyUserData(enemyType.getWidth(), enemyType.getHeight(), enemyType.getRegions());
    body.setUserData(userData);


    Filter filterData = fixture.getFilterData();
    filterData.categoryBits = ActorMasking.CATEGORY_ENEMY;
    filterData.maskBits = ActorMasking.MASK_ENEMY;
    fixture.setFilterData(filterData);

    shape.dispose();
    return body;
}


public static Body createBullet(World world, Player player) {
    BulletType bulletType1 = BulletType.BULLET_TYPE_1;
    BodyDef bodyDef = new BodyDef();
    bodyDef.type = BodyDef.BodyType.DynamicBody;
    float finalX = player.body.getPosition().x;
    float finalY = player.body.getPosition().y;
    bodyDef.position.set(new Vector2(finalX, finalY/*+0.5f*/));

    PolygonShape shape = new PolygonShape();
    shape.setAsBox(bulletType1.getWidth() / 2, bulletType1.getHeight() / 2);
    Body body = world.createBody(bodyDef);
    Fixture fixture = body.createFixture(shape, 0.0f);


    body.resetMassData();
    BulletUserData userData = new BulletUserData(bulletType1.getWidth(), bulletType1.getHeight());
    body.setUserData(userData);


    Filter filterData = fixture.getFilterData();
    filterData.categoryBits = ActorMasking.CATEGORY_BULLET;
    filterData.maskBits = ActorMasking.MASK_BULLET;
    fixture.setFilterData(filterData);

    shape.dispose();
    return body;
}

}

//所有类别和屏蔽位的屏蔽类

公共类ActorMasking {

public static final short CATEGORY_ENEMY = 0x0001;
public static final short CATEGORY_PLAYER = 0x0002;
public static final short CATEGORY_GROUND = 0x0004;
public static final short CATEGORY_BULLET = 0x008;


public static final short MASK_PLAYER = CATEGORY_ENEMY | CATEGORY_GROUND;
public static final short MASK_ENEMY = CATEGORY_PLAYER| CATEGORY_GROUND;
public static final short MASK_GROUND = CATEGORY_PLAYER | CATEGORY_BULLET;
public static final short MASK_BULLET = CATEGORY_GROUND;

}

它无法正常工作，因为我的玩家会与敌人发生碰撞，敌人会与玩家发生碰撞。但是我的子弹不会与它碰撞的地面发生碰撞。

请帮忙。

怎么做身体上的掩饰？

0 个答案: