同一sprite类的多个实例在libGDX和box2d中显示不同的动画帧

Question

所以这是我的问题。 我创建了一个敌人类，该类在libGDX中扩展了Sprite，并在其中带有Box2d主体以进行碰撞检测。 我的代码在循环中在游戏中动态地调用敌人类别，但是问题是，在碰撞后，我使用不同的动画序列来描绘被击败的敌人时，该动画序列针对同一类别的不同实例显示了不同的帧频。 我不知道为什么会这样。

这是在循环中调用的类。

public class Spearman extends Enemies {
    private Body spearman1;
    private TextureAtlas atlas;
    private Animation approaching,defeated;
    private float time;
    private TextureRegion spearmaninit;

    private int spearmanstate=0;


    public Spearman(Play_State state,float x, float y){
        super(state,x,y);
        atlas=new TextureAtlas();
        atlas=Lone_Warrior1.getAtlas(3);
        time=0f;

        Array<TextureRegion> frames=new Array<TextureRegion>();
        for(int i=0;i<3;i++)
        {
            frames.add(new TextureRegion(atlas.findRegion("Spearman"+i)));
        }
        approaching=new Animation(0.15f,frames);
        frames.clear();
        for(int i=0;i<5;i++)
        {
         frames.add(new                         TextureRegion(atlas.findRegion("Spearmandefeated"+i)));
        }
        defeated=new Animation(2.2f,frames);
        frames.clear();
        spearmaninit=new TextureRegion(atlas.findRegion("Spearman0"));
        setBounds(getX(),getY(),200/ Lone_Warrior1.PPM,170/Lone_Warrior1.PPM);
        setRegion(spearmaninit);

    }

    public void update(float dt){

        if(spearmanstate!=-1) {
            setPosition(spearman1.getPosition().x - getWidth() / 2,        (spearman1.getPosition().y - getHeight() / 2)+13/Lone_Warrior1.PPM);
            if (spearmanstate==0 && spearman1.getLinearVelocity().x>0)
                spearmanstate=1;
            if (spearmanstate==1 && spearman1.getLinearVelocity().x==0) {
                Play_State.bodiesToRemove.add(spearman1);
                Play_State.enemycounter++;
                spearmanstate = -1;

            }
            if(spearmanstate==0)
                spearman1.setLinearVelocity(-2f,0);
            setRegion(getFrame(dt));
        }
    }
    public boolean check(){
        if(spearmanstate!=-1)
             return true;
    else
        return false;
    }
    public TextureRegion getFrame(float dt){
        TextureRegion region=null;
        region=approaching.getKeyFrame(time,true);
        if(spearmanstate==1)
           region=defeated.getKeyFrame(time);
       /* if(!region.isFlipX())
        region.flip(true,false);*/
        time=time+dt;
        return region;

    }

    @Override
    public void defineEnemy() {
        BodyDef bdef=new BodyDef();
        bdef.position.set(getX(),getY());
        bdef.type=BodyDef.BodyType.DynamicBody;
        spearman1=Play_State.world.createBody(bdef);

        FixtureDef fdef=new FixtureDef();
        PolygonShape War1=new PolygonShape();
        War1.setAsBox(60/Lone_Warrior1.PPM,60/Lone_Warrior1.PPM);

        fdef.shape=War1;
        fdef.filter.categoryBits=Lone_Warrior1.BIT_APPROACHING;
               fdef.filter.maskBits=Lone_Warrior1.BIT_GROUND|Lone_Warrior1.BIT_RUN|Lone_Warrior      1.BIT_ATTACK;
        spearman1.createFixture(fdef).setUserData("spearman1");

    }

    }

调用Spearman的抽象类：

    public abstract class Enemies extends Sprite {
    World world;
    Body b2body;
    public Enemies(){

    }
    public Enemies(Play_State screen,float x, float y){
        this.world=screen.world;
        setPosition(x,y);
        defineEnemy();
    }

    public abstract void defineEnemy();
    public abstract void update(float dt);
    public abstract boolean check();
}

这是调用该类的代码。

switch (a) {
            case 1:
                System.out.println("creating spearman");
                spearman.add(new Spearman(screen, (Lone_Warrior1.V_Width /Lone_Warrior1.PPM) + (Lone_Warrior1.x+``(i*500/Lone_Warrior1.PPM)), 100 /       Lone_Warrior1.PPM));
                break;
               }

Answer 1

解决了！

是的，Sprite类对于逐帧动画有点麻烦，但是我已经完成了很多代码，因此需要为该问题找到补丁作业，而不必重写整个代码。

所以这是答案：

time=currentState==previousState ? time+dt : 0;
    previousState=currentState;

每当您在update方法中使用增量时间更新时间时，请确保检查当前动画序列是否等于上一个动画序列；如果不等于，则将时间设为零，然后在碰撞后，下一个动画将按预期的序列播放。只需为您所处的状态放置一个跟踪器即可。

int State=1://the default form for player
    State=2;//the state of animation when the player is hit`
`    currentState=State;