android– 如何在libgdx中制作敌人仪表探测器？

概述在我自上而下的游戏中,我有一个敌人探测器来探测敌人是否在附近.我的问题是我如何创建动态我的仪表栏的过渡？我是这个框架的新手.谢谢和进步当玩家检测到附近的敌人时,仪表栏将像下面的图像屏幕一样动画没有敌人   我的代码：//detectormeter_bar=newTexture("

在我自上而下的游戏中,我有一个敌人探测器来探测敌人是否在附近.我的问题是我如何创建动态我的仪表栏的过渡？我是这个框架的新手.谢谢和进步

当玩家检测到附近的敌人时,仪表栏将像下面的图像屏幕一样动画

没有敌人

   

我的代码：

    //detector    meter_bar = new Texture("meter_bar.png");    myTextureRegion = new TextureRegion(meter_bar);    myTexRegionDrawable = new TextureRegionDrawable(myTextureRegion);    actormeter_bar = new Image(myTexRegionDrawable);    actormeter_bar.setposition(200,1005);    stage.addActor(actormeter_bar);    meter = new Texture("meter.png");    myTextureRegion = new TextureRegion(meter);    myTexRegionDrawable = new TextureRegionDrawable(myTextureRegion);    actormetter = new Image(myTexRegionDrawable);    actormetter.setposition(190,990);    stage.addActor( actormetter);

球员运动(前锋)：

//right_control    right_paw = new Texture(Gdx.files.internal("right_paw.png"));    myTextureRegion = new TextureRegion(right_paw);    myTexRegionDrawable = new TextureRegionDrawable(myTextureRegion);    moveForward = new Imagebutton(myTexRegionDrawable); //Set the button up    moveForward.getStyle().imageUp = new TextureRegionDrawable(new TextureRegion(new Texture(Gdx.files.internal("right_paw.png"))));    //the hover    moveForward.getStyle().imageDown = new TextureRegionDrawable(new TextureRegion(new Texture(Gdx.files.internal("right_paw-hover.png"))));    moveForward.setposition(520,110);    stage.addActor(moveForward); //Add the button to the stage to perform rendering and take input.    Gdx.input.setinputProcessor(stage);    moveForward.addListener(new inputListener(){        @OverrIDe        public voID touchUp (inputEvent event, float x, float y, int pointer, int button) {            System.out.println("Right button pressed");            progressKnobX = progressKnobX + 4;            actorprogressknob.setX(progressKnobX); // x-position to move to            if(progressKnobX > 418 ) progressKnobX= 418 ;            music.play();            motionState=MotionState.NONE;        }        @OverrIDe        public boolean touchDown (inputEvent event, float x, float y, int pointer, int button) {            motionState=MotionState.UP;            return true;        }    });    stage.addActor(moveForward);

敌人精灵运动：

 zombIE = new Texture(Gdx.files.internal("enemy/ZombIESprite.png"));    zombIEsprite = new Sprite(zombIE);    zombIEenemy = new Rectangle();    zombIEenemy.setWIDth(zombIEsprite.getWIDth());    zombIEenemy = zombIEsprite.getBoundingRectangle();    zombIEenemy.x = zombIEX;    zombIEenemy.y = zombIEY;    TextureRegion[][] zom = TextureRegion.split(zombIE, zombIE.getWIDth() / ZombIE_FRAME_ColS, zombIE.getHeight() / ZombIE_FRAME_ROWS);    TextureRegion[] zwalkFrames  = new TextureRegion[ZombIE_FRAME_ColS * ZombIE_FRAME_ROWS];    index = 0;    for (int i = 0; i < ZombIE_FRAME_ROWS; i++) {        for (int j = 0; j < ZombIE_FRAME_ColS; j++) {            zwalkFrames[index++] = zom[i][j];        }    }    zombIEwalkAnimation = new Animation<TextureRegion>(0.120f, zwalkFrames);

MoveForward按钮功能：

//button functionsMotionState motionState=MotionState.NONE;enum MotionState {    NONE {        @OverrIDe        public boolean update(Rectangle player) {            return true;        }    },    UP {        @OverrIDe        public boolean update(Rectangle player) {            player.y += 300 * Gdx.graphics.getDeltaTime();            return false;        }    },    DOWN{        @OverrIDe        public boolean update(Rectangle player) {            player.y -= 300 * Gdx.graphics.getDeltaTime();            return false;        }    },    left{        @OverrIDe        public boolean update(Rectangle player)  {            player.x -= 100 * Gdx.graphics.getDeltaTime();            return false;        }    },    RIGHT{        @OverrIDe        public boolean update(Rectangle player) {            player.x  += 100 * Gdx.graphics.getDeltaTime();            return false;        }    };    public abstract boolean update(Rectangle player);}

给予

    if(Gdx.input.isKeypressed(input.Keys.DOWN)) motionState = MotionState.DOWN;    if(Gdx.input.isKeypressed(input.Keys.UP)) motionState=MotionState.UP;    if(Gdx.input.isKeypressed(input.Keys.left)) motionState=MotionState.left;    if(Gdx.input.isKeypressed(input.Keys.RIGHT)) motionState=MotionState.RIGHT;    if(motionState.update(player)) motionState=MotionState.NONE;    if(player.y> 1910){        zombIEenemy.y -= 60 * Gdx.graphics.getDeltaTime();    }

解决方法:

在我回答你的初步问题之前,我想建议你学会使用Libgdx extension Ashley,因为事情的样子非常混乱,你很难维持.

我的答案：

持有一个ArrayList<>或类似的数据模型与你内部的所有游戏敌人,然后我们将遍历每一个并获得它的位置并计算与玩家的距离.

Enemy closestEnemy = null;float closestEnemydist = -1;for(Enemy enemy : listofEnemIEs){    /* here we find the distance to the player */    float disttoplayer = Math.sqrt((enemy.y-player.x)^2 + (enemy.y-player.y)^2);    /* initiate closestEnemydist for the first time */    if(closestEnemydist == -1){         closestEnemydist = disttoplayer;    }    /* we find the closest distance to the player */    float mindist = Math.min(closestEnemydist, disttoplayer);    /* we make sure it is the closest and save the closest enemy as well */    if(mindist <= closestEnemydist){        closestEnemydist = mindist;        closestEnemy = enemy;    }}

这给你最近的敌人和它的距离,你可以制定它的方法或只是你想要的距离,你可以在每次游戏更新时运行此代码.

距离计：

在这里我们要做一个小数学,让我们说你的仪表显示百分比……从0％到100％,你必须选择你的仪表认为0％的最大距离(意味着敌人称之为最大距离),对于你来说很容易理解这个想象,距离是100,看看这个方法.

public int calcmeter(float closestEnemydist, float maxdistance) {    int meter = 0;    /* calculate only if enemy is in range */    if(closestEnemydist < maxdistance){        /* using rounding and multiply by 100f because we wanted          * values from 0 - 100, you can can modify this to work just          * with float from 0 - 1f          */        meter = Math.round(            /*              * here we flip the percentage so if the enemy is very             * close then your meter will be higher              */            (1f - (closestEnemydist / maxdistance)) * 100f        );    }    return meter;}

希望这对你有所帮助,祝你好运:)

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