package com.cvte.game;
import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.InputProcessor;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.Sprite;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.math.MathUtils;
import com.badlogic.gdx.math.Vector2;
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.EdgeShape;
import com.badlogic.gdx.physics.box2d.FixtureDef;
import com.badlogic.gdx.physics.box2d.World;
import com.badlogic.gdx.utils.Array;
public class Demo2 extends ApplicationAdapter implements InputProcessor {
private static final float PXTM = 80;
protected OrthographicCamera mCamera;
private Box2DDebugRenderer mRenderer;
private World mWorld;
private SpriteBatch mBatch;
private Texture mTextureBall;
private float mBallRadius;
@Override
public void create() {
float cameraWidth = Gdx.graphics.getWidth() / PXTM;
float cameraHeight = Gdx.graphics.getHeight() / PXTM;
mCamera = new OrthographicCamera(cameraWidth, cameraHeight);
mCamera.position.set(cameraWidth / 2, cameraHeight / 2, 0);
mCamera.update();
mRenderer = new Box2DDebugRenderer();
mWorld = new World(new Vector2(0, 0), true);
//wall
{
BodyDef bd = new BodyDef();
bd.type = BodyType.StaticBody;
EdgeShape edgeShape = new EdgeShape();
FixtureDef fd = new FixtureDef();
fd.shape = edgeShape;
Body box = mWorld.createBody(bd);
edgeShape.set(new Vector2(toWorldSize(0), toWorldSize(0)), new Vector2(toWorldSize(Gdx.graphics.getWidth()), toWorldSize(0)));
box.createFixture(fd);
edgeShape.set(new Vector2(toWorldSize(Gdx.graphics.getWidth()), toWorldSize(0)), new Vector2(toWorldSize(Gdx.graphics.getWidth()), toWorldSize(Gdx.graphics.getHeight())));
box.createFixture(fd);
edgeShape.set(new Vector2(toWorldSize(Gdx.graphics.getWidth()), toWorldSize(Gdx.graphics.getHeight())), new Vector2(0, toWorldSize(Gdx.graphics.getHeight())));
box.createFixture(fd);
edgeShape.set(new Vector2(toWorldSize(0), toWorldSize(Gdx.graphics.getHeight())), new Vector2(0, toWorldSize(0)));
box.createFixture(fd);
}
mTextureBall = new Texture(Gdx.files.internal("coin1.png"));
mBatch = new SpriteBatch();
Gdx.input.setInputProcessor(this);
}
@Override
public void dispose() {
mCamera = null;
mRenderer.dispose();
mRenderer = null;
mWorld.dispose();
mWorld = null;
mBatch = null;
mTextureBall.dispose();
mTextureBall = null;
}
@Override
public void render() {
Gdx.gl.glClearColor(1, 1, 1, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
mWorld.step(Gdx.app.getGraphics().getDeltaTime(), 6, 2);
mBatch.setProjectionMatrix(mCamera.combined);
mBatch.begin();
Array<Body> bodies = new Array<Body>();
mWorld.getBodies(bodies);
for (Body b : bodies) {
Ball ball = (Ball)b.getUserData();
if (ball != null) {
ball.setPosition(b.getPosition().x, b.getPosition().y);
ball.setRotation(MathUtils.radiansToDegrees * b.getAngle());
ball.draw(mBatch);
}
}
mBatch.end();
}
private float toWorldSize(float pos) {
return (pos / PXTM);
}
private void addBall() {
BodyDef bd = new BodyDef();
bd.type = BodyType.DynamicBody;
bd.position.set(toWorldSize(400), toWorldSize(800));
mBallRadius = toWorldSize(20);
CircleShape circleShape = new CircleShape();
circleShape.setRadius(mBallRadius);
FixtureDef fd = new FixtureDef();
fd.shape = circleShape;
fd.density = 1;
fd.friction = 0;
fd.restitution = 1;
Body b = mWorld.createBody(bd);
b.createFixture(fd);
Vector2 force = new Vector2(100, 100);
b.applyForce(force, bd.position, true);
b.applyLinearImpulse(force, bd.position, true);
Ball ball = new Ball(mTextureBall, mBallRadius);
b.setUserData(ball);
}
@Override
public boolean keyDown(int keycode) {
return false;
}
@Override
public boolean keyUp(int keycode) {
return false;
}
@Override
public boolean keyTyped(char character) {
return false;
}
@Override
public boolean touchDown(int screenX, int screenY, int pointer, int button) {
addBall();
return false;
}
@Override
public boolean touchUp(int screenX, int screenY, int pointer, int button) {
return false;
}
@Override
public boolean touchDragged(int screenX, int screenY, int pointer) {
return false;
}
@Override
public boolean mouseMoved(int screenX, int screenY) {
return false;
}
@Override
public boolean scrolled(int amount) {
return false;
}
public class Ball extends Sprite {
public Ball(Texture texture, float radius) {
super(texture);
setSize(radius * 2, radius * 2);
}
}
}
原文地址：http://blog.csdn.net/linmy1211/article/details/39319971
