Box2dTester 2

Box2dTutorial - Code 2

package pl.kotcrab.libgdxtests;

import pl.kotcrab.core.Touch;

import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input.Buttons;
import com.badlogic.gdx.graphics.GL10;
import com.badlogic.gdx.graphics.OrthographicCamera;
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.Fixture;
import com.badlogic.gdx.physics.box2d.FixtureDef;
import com.badlogic.gdx.physics.box2d.PolygonShape;
import com.badlogic.gdx.physics.box2d.World;

public class Box2dTester implements ApplicationListener
{
	private OrthographicCamera camera;
	
	static final float WORLD_TO_BOX = 0.01f;
	static final float BOX_TO_WORLD = 100f;
	
	private World world;
	private Box2DDebugRenderer debugRenderer;
	
	@Override
	public void create()
	{
		camera = new OrthographicCamera(800, 480);
		camera.position.x = 400;
		camera.position.y = 240;
		
		world = new World(new Vector2(0, -10), true);
		debugRenderer = new Box2DDebugRenderer();
		
		Touch.setCamera(camera);
		
		// teren
		BodyDef groundBodyDef = new BodyDef();
		groundBodyDef.position.set(new Vector2(400 * WORLD_TO_BOX, 10 * WORLD_TO_BOX));
		
		Body groundBody = world.createBody(groundBodyDef);
		
		PolygonShape groundBox = new PolygonShape();
		groundBox.setAsBox(800 * WORLD_TO_BOX / 2, 10 * WORLD_TO_BOX / 2);
		groundBody.createFixture(groundBox, 0);
		groundBox.dispose();
		
	}
	
	private void createCirlce(float x, float y)
	{
		BodyDef bodyDef = new BodyDef();
		bodyDef.type = BodyType.DynamicBody;
		bodyDef.position.set(new Vector2(x * WORLD_TO_BOX, y * WORLD_TO_BOX));
		
		Body body = world.createBody(bodyDef);
		
		CircleShape circle = new CircleShape();
		circle.setRadius(20f * WORLD_TO_BOX);
		
		FixtureDef fixtureDef = new FixtureDef();
		fixtureDef.shape = circle;
		fixtureDef.density = 0.5f;
		fixtureDef.friction = 0.4f;
		fixtureDef.restitution = 0.6f;
		
		body.createFixture(fixtureDef);
		
		circle.dispose();
	}
	
	@Override
	public void render()
	{
		Gdx.gl.glClearColor(0, 0, 0, 1);
		Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
		
		camera.update();
		
		if(Gdx.input.justTouched())
		{
			if(Gdx.input.isButtonPressed(Buttons.LEFT)) 
				createCirlce(Touch.calcX(Gdx.input.getX()), Touch.calcY(Gdx.input.getY()));
		}
		
		world.step(1 / 60f, 6, 2);
		debugRenderer.render(world, camera.combined.scl(BOX_TO_WORLD));
	}
	
	@Override
	public void dispose()
	{
		world.dispose();
	}
	
	//@formatter:off
	@Override public void pause(){}
	@Override public void resume(){}
	@Override public void resize(int width, int height){}
	//@formatter:on
	
}