[英]Java/Android - libGDX/box2d - body has low velocity
我試圖創建一個簡單的FlappyBird克隆,而不是一只鳥,而是一頂帽子。
到目前為止,代碼很簡單:位於屏幕中心的帽子(Sprite obj。)為position.x等於camera.x(因為照相機移動,帽子也隨之“移動”),帽子的位置由動態物體影響,該物體通過重力和向上的力移動。
問題是:帽子太慢,我什至將世界向量設置為0,500,但它仍然走得很慢+“向上”力甚至更慢,因此程序中對象的總速度非常低,我我們嘗試了許多不同的方法來進行更改(更改PPM,增加力量大小等)
這是代碼:
final float PIXELS_TO_METERS = 100f;
// The first function to launch, runs only once.
@Override
public void create () {
camera = new OrthographicCamera(288, 497);
batch = new SpriteBatch();
bg = new Texture("bg.png");
hat = new Sprite(new Texture("hat.png"));
ground = new Texture("ground.png");
world = new World(new Vector2(0, -9.18f), true);
BodyDef bodyDef = new BodyDef();
PolygonShape shape = new PolygonShape();
FixtureDef fdef = new FixtureDef();
bodyDef.type = BodyDef.BodyType.DynamicBody;
bodyDef.position.set(hat.getX(), hat.getY());
bhat = world.createBody(bodyDef);
shape.setAsBox(hat.getWidth()/PIXELS_TO_METERS,
hat.getHeight()/PIXELS_TO_METERS);
fdef.shape = shape;
bhat.createFixture(fdef);
}
@Override
public void render () {
cameraupdate();
Gdx.gl.glClearColor(1, 1, 1, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
worldupdate();
worlddraw();
batch.setProjectionMatrix(camera.combined);
}
public void worldupdate() {
if(fTouch)
world.step(Gdx.graphics.getDeltaTime(), 6, 2);
if(Gdx.input.justTouched()) {
if(fTouch == false)
fTouch = true;
bhat.applyForceToCenter(new Vector2(0, 30), true);
}
}
public void worlddraw() {
batch.begin();
batch.draw(bg, camera.position.x-144, -268, bg.getWidth(),
bg.getHeight()+20);
batch.draw(hat, camera.position.x, bhat.getPosition().y);
for (int i = 0; i < 4000; i++)
batch.draw(ground, i * ground.getWidth() - 287, -250);
batch.end();
}
您可能需要將步驟修復為:
public static float TIME_STEP = 1/500;
public float accumulator = 0
public void worldupdate() {
if(fTouch) {
this.accumulator += Gdx.graphics.getDeltaTime();
while (this.accumulator >= TIME_STEP) {
world.step(TIME_STEP, 6, 2);
this.accumulator -= TIME_STEP
}
}
}
這可能會提高速度。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.