我的游戏呈现平铺地图。我让OrthographicCamera将其position.x更改为右侧，并可以看到背景（平铺地图）滚动。这很好。
但是其他物体（玩家和一些球）会（视觉上）改变他们对应于相机的位置。它们不应该移动，因为只有相机移动。
package com.me.drop;
import java.util.Iterator;
import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Game;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input.Keys;
import com.badlogic.gdx.audio.Music;
import com.badlogic.gdx.audio.Sound;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL10;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.PerspectiveCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.VertexAttributes.Usage;
import com.badlogic.gdx.graphics.g2d.Sprite;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g3d.Environment;
import com.badlogic.gdx.graphics.g3d.Material;
import com.badlogic.gdx.graphics.g3d.Model;
import com.badlogic.gdx.graphics.g3d.ModelBatch;
import com.badlogic.gdx.graphics.g3d.ModelInstance;
import com.badlogic.gdx.graphics.g3d.attributes.ColorAttribute;
import com.badlogic.gdx.graphics.g3d.environment.DirectionalLight;
import com.badlogic.gdx.graphics.g3d.utils.ModelBuilder;
import com.badlogic.gdx.maps.tiled.TiledMap;
import com.badlogic.gdx.maps.tiled.TiledMapRenderer;
import com.badlogic.gdx.maps.tiled.TiledMapTileLayer;
import com.badlogic.gdx.maps.tiled.TmxMapLoader;
import com.badlogic.gdx.maps.tiled.renderers.OrthogonalTiledMapRenderer;
import com.badlogic.gdx.math.Circle;
import com.badlogic.gdx.math.MathUtils;
import com.badlogic.gdx.math.Rectangle;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.physics.box2d.Body;
import com.badlogic.gdx.physics.box2d.BodyDef;
import com.badlogic.gdx.physics.box2d.BodyDef.BodyType;
import com.badlogic.gdx.physics.box2d.Box2DDebugRenderer;
import com.badlogic.gdx.physics.box2d.CircleShape;
import com.badlogic.gdx.physics.box2d.Fixture;
import com.badlogic.gdx.physics.box2d.FixtureDef;
import com.badlogic.gdx.physics.box2d.PolygonShape;
import com.badlogic.gdx.physics.box2d.World;
import com.badlogic.gdx.utils.Array;
import com.badlogic.gdx.utils.GdxNativesLoader;
import com.badlogic.gdx.utils.TimeUtils;
public class MyTestGame extends Game {
Texture dropImage;
Texture bucketImage;
Sound dropSound;
Music rainMusic;
SpriteBatch batch;
OrthographicCamera camera;
Rectangle bucket;
Array<Rectangle> raindrops;
long lastDropTime;
Animator animator = new Animator();
Body animatorBody;
private Physics physics;
public Environment environment;
// public PerspectiveCamera cam;
public Model model;
public ModelBatch modelBatch;
public ModelInstance instance;
static final int WIDTH = 1600;
static final int HEIGHT = 960;
public final static float ORTHO_SCALE=1;
public final static float WORLD_SCALE=32;
Ball balls[] = new Ball[10];
Spieler player;
@Override
public void create() {
environment = new Environment();
environment.set(new ColorAttribute(ColorAttribute.AmbientLight, 0.4f, 0.4f, 0.4f, 1f));
environment.add(new DirectionalLight().set(0.8f, 0.8f, 0.8f, -1f, -0.8f, -0.2f));
glViewport = new Rectangle(0, 0, WIDTH, HEIGHT);
// load the images for the droplet and the bucket, 64x64 pixels each
dropImage = new Texture(Gdx.files.internal("droplet.png"));
bucketImage = new Texture(Gdx.files.internal("bucket.png"));
// load the drop sound effect and the rain background "music"
dropSound = Gdx.audio.newSound(Gdx.files.internal("drop.wav"));
rainMusic = Gdx.audio.newMusic(Gdx.files.internal("rain.mp3"));
// start the playback of the background music immediately
rainMusic.setLooping(true);
rainMusic.play();
// create the camera and the SpriteBatch
camera = new OrthographicCamera();
//camera.setToOrtho(false, 400, 240);
camera.setToOrtho(false, 800/ORTHO_SCALE, 480/ORTHO_SCALE);
batch = new SpriteBatch();
ModelBuilder modelBuilder = new ModelBuilder();
model = modelBuilder.createBox(5f, 5f, 5f,
new Material(ColorAttribute.createDiffuse(Color.GREEN)),
Usage.Position | Usage.Normal);
instance = new ModelInstance(model);
// Box2d
physics = Physics.getInstance();
// floor
physics.initFloor(0f, 0f, camera.viewportWidth, 0f);
// ceiling
// physics.initFloor(0f, camera.viewportHeight, camera.viewportWidth, 10f);
// left Wall
physics.initFloor(0f, 0f, 0f, camera.viewportHeight);
// right Wall
physics.initFloor(camera.viewportWidth, 0f, 0f, camera.viewportHeight);
float x = 150;
float y = camera.viewportHeight;
for (int i = 0; i < balls.length; i++) {
if (i%10==0) {
x += 10;
y = camera.viewportHeight / 2;
}
y += x;
balls[i] = new Ball(x, y , 20f , 20f, 0.4f, 0.8f);
}
player = new Spieler(50, camera.viewportHeight, 60f, 120f);
loadBackground();
}
TiledMapRenderer tileRenderer;
public void loadBackground() {
TiledMap map = new TmxMapLoader().load("maps/mymap.tmx");
System.out.println(map.getTileSets().toString());
float unitScale = 1 / 1;
tileRenderer = new OrthogonalTiledMapRenderer(map, unitScale);
physics.createFixturesForMap(map);
}
private Rectangle glViewport;
//@Override
public void render() {
GL10 gl = Gdx.graphics.getGL10();
// Camera --------------------- /
gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
gl.glViewport((int) glViewport.x, (int) glViewport.y,
(int) glViewport.width, (int) glViewport.height);
//
// tell the camera to update its matrices.
camera.update();
camera.apply(gl);
// tell the SpriteBatch to render in the
// coordinate system specified by the camera.
batch.setProjectionMatrix(camera.combined);
// background
tileRenderer.setView(camera);
tileRenderer.render();
for (Ball b : balls)
b.render();
player.render();
grabUserAction();
// Box2d
physics.step();
updateObjects();
physics.debugRenderer.render(physics.world, camera.combined);
}
private void grabUserAction() {
// process user input
if(Gdx.input.isTouched()) {
Vector3 touchPos = new Vector3();
touchPos.set(Gdx.input.getX(), Gdx.input.getY(), 0);
camera.unproject(touchPos);
bucket.x = touchPos.x - 64 / 2;
}
Vector2 vel = this.player.getBody().getLinearVelocity();
Vector2 pos = this.player.getBody().getPosition();
// apply left impulse, but only if max velocity is not reached yet
if (Gdx.input.isKeyPressed(Keys.LEFT)) { // && vel.x > -MAX_VELOCITY) {
// this.animatorBody.localPoint2.x -= 200 *
// Gdx.graphics.getDeltaTime();
pos.x -= 2 * Gdx.graphics.getDeltaTime();
this.player.getBody().setTransform(pos, 0);
// this.animatorBody.applyLinearImpulse(0, -0.8f, pos.x, pos.y,
// true);
// this.animatorBody.applyLinearImpulse(-5000, 0, pos.x, pos.y,
// true);
}
// apply right impulse, but only if max velocity is not reached yet
if (Gdx.input.isKeyPressed(Keys.RIGHT)) { // && vel.x < MAX_VELOCITY) {
// this.animatorBody.localPoint2.x += 200 *
// Gdx.graphics.getDeltaTime();
pos.x += 2 * Gdx.graphics.getDeltaTime();
this.player.getBody().setTransform(pos, 0);
// this.animatorBody.applyLinearImpulse(5000, 0, pos.x, pos.y,
// true);
}
if (Gdx.input.isKeyPressed(Keys.UP)) {
Vector2 impuls = new Vector2(0, 500f);
this.player.getBody().applyLinearImpulse(impuls, player.getBody().getWorldCenter(),true);
// this.animatorBody.applyAngularImpulse(-5.0f, true);
//(impulse, wake);(new b2Vec2(0.0, -3.0), Body.GetWorldCenter());
}
if (Gdx.input.isKeyPressed(Keys.D)) {
this.camera.position.x += 2;
this.camera.update();
}
else if (Gdx.input.isKeyPressed(Keys.A)) {
this.camera.position.x -= 2;
this.camera.update();
}
}
private void updateObjects() {
Array<Body> array = new Array<Body>();
physics.world.getBodies(array);
Iterator<Body> bi = array.iterator();
while (bi.hasNext()){
Body b = bi.next();
// Get the body's user data - in this example, our user
// data is an instance of the Entity class
IObject e = (IObject) b.getUserData();
if (e != null) {
// Update the entities/sprites position and angle
e.setPosition((b.getPosition().x - e.getWidth()/2/WORLD_SCALE) * WORLD_SCALE
, (b.getPosition().y - e.getHeight()/2/WORLD_SCALE) * WORLD_SCALE);
// We need to convert our angle from radians to degrees
//e.setRotation(MathUtils.radiansToDegrees * b.getAngle());
}
}
}
@Override
public void dispose() {
// dispose of all the native resources
dropImage.dispose();
bucketImage.dispose();
dropSound.dispose();
rainMusic.dispose();
batch.dispose();
// modelBatch.dispose();
model.dispose();
}
@Override
public void resize(int width, int height) {
super.resize(width, height);
//
// Vector3 oldpos = new Vector3(camera.position);
// camera.setToOrtho(false,
// width/WORLD_SCALE,
// height/WORLD_SCALE);
// camera.translate(oldpos.x-camera.position.x,oldpos.y-camera.position.y);
}
@Override
public void pause() {
super.pause();
}
@Override
public void resume() {
super.resume();
}
}