Физические безумства01.05.2019 22:47

package com.mygdx.game;

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.physics.box2d.FixtureDef;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
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.Box2DDebugRenderer;
import com.badlogic.gdx.physics.box2d.CircleShape;
import com.badlogic.gdx.physics.box2d.PolygonShape;
import com.badlogic.gdx.physics.box2d.World;
import utils.Constants;

public class MyGdxGame extends ApplicationAdapter {
	SpriteBatch batch;
	Texture img;
	private OrthographicCamera camera;
	private boolean DEBUG = false;
	private World world;
	private Body ball;
	private Body floor;
	private Body wall;
	private Body verticals;
	private Body horizontals;
	private Box2DDebugRenderer b2dr;

	public void create() {
		float w = Gdx.graphics.getWidth();
		float h = Gdx.graphics.getHeight();
		camera = new OrthographicCamera();
		camera.setToOrtho(false, w / 2, h / 2);
		world = new World(new Vector2(0, -9.8f), false);
		b2dr = new Box2DDebugRenderer();
		// наш мячик
		ball = createPlayer();
		// границы мира
		floor = createfloor();
		wall = createwall(100, 170);
		wall = createwall(-60, 170);

		// создаем мячики снизу. Через цикл пробовал, не работает
		verticals = createverticals(5, 50);
		verticals = createverticals(10, 50);
		verticals = createverticals(15, 50);
		verticals = createverticals(20, 50);
		verticals = createverticals(25, 50);
		verticals = createverticals(30, 50);
		verticals = createverticals(35, 50);

		verticals = createverticals(5, 55);
		verticals = createverticals(10, 55);
		verticals = createverticals(15, 55);
		verticals = createverticals(20, 55);
		verticals = createverticals(25, 55);
		verticals = createverticals(30, 55);
		verticals = createverticals(35, 55);

		verticals = createverticals(5, 60);
		verticals = createverticals(10, 60);
		verticals = createverticals(15, 60);
		verticals = createverticals(20, 60);
		verticals = createverticals(25, 60);
		verticals = createverticals(30, 60);
		verticals = createverticals(35, 60);

		verticals = createverticals(5, 70);
		verticals = createverticals(10, 70);
		verticals = createverticals(15, 70);
		verticals = createverticals(20, 70);
		verticals = createverticals(25, 70);
		verticals = createverticals(30, 70);
		verticals = createverticals(35, 70);

		verticals = createverticals(5, 80);
		verticals = createverticals(10, 80);
		verticals = createverticals(15, 80);
		verticals = createverticals(20, 80);
		verticals = createverticals(25, 80);
		verticals = createverticals(30, 80);
		verticals = createverticals(35, 80);
	}

	public void render() {
		update(Gdx.graphics.getDeltaTime());
		Gdx.gl.glClearColor(0, 0, 0, 1);
		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
		b2dr.render(world, camera.combined.scl(Constants.PPM));
	}

	public void resize(int width, int height) {
		camera.setToOrtho(false, width / 2, height / 2);
	}

	public void dispose() {
		world.dispose();
		b2dr.dispose();
	}

	public void update(float delta) {
		world.step(1 / 60f, 6, 2);
		inputUpdate(delta);
		cameraUpdate(delta);

	}

	// чтобы мяч вращался
	public void inputUpdate(float delta) {
		ball.setAngularVelocity(3.0f);
	}

	public void cameraUpdate(float delta) {
		Vector3 position = camera.position;
		position.x = ball.getPosition().x * Constants.PPM;
		position.y = ball.getPosition().y * Constants.PPM;
		camera.position.set(position);
		camera.update();
	}

	// создаем мячик
	public Body createPlayer() {
		Body pBody;
		BodyDef def = new BodyDef();
		def.type = BodyDef.BodyType.DynamicBody;
		def.position.set(20 / Constants.PPM, 800 / Constants.PPM);
		def.fixedRotation = false;
		pBody = world.createBody(def);
		CircleShape shape = new CircleShape();
		shape.setRadius(10 / Constants.PPM);
		pBody.createFixture(shape, 1.0f);
		def.bullet = true;
		shape.dispose();
		return pBody;
	}

	// создаем пол
	public Body createfloor() {
		Body fBody;
		BodyDef def = new BodyDef();
		def.type = BodyDef.BodyType.StaticBody;
		def.position.set(0, 0);
		def.fixedRotation = true;
		fBody = world.createBody(def);
		PolygonShape shape = new PolygonShape();
		shape.setAsBox(480 / Constants.PPM, 70 / Constants.PPM);
		fBody.createFixture(shape, 0.001f);
		shape.dispose();
		return fBody;
	}

	// создаем стены
	public Body createwall(int xo, int yo) {
		Body fBody;
		BodyDef def = new BodyDef();
		def.type = BodyDef.BodyType.StaticBody;
		def.position.set(xo / Constants.PPM, yo / Constants.PPM);
		def.fixedRotation = true;
		fBody = world.createBody(def);
		PolygonShape shape = new PolygonShape();
		shape.setAsBox(50 / Constants.PPM, 100 / Constants.PPM);
		fBody.createFixture(shape, 0.001f);
		shape.dispose();
		return fBody;
	}

	// обратите здесь внимание на параметры
	public Body createverticals(int xo, int yo) {
		Body pBody;
		BodyDef def = new BodyDef();
		def.type = BodyDef.BodyType.DynamicBody;
		def.position.set(xo / Constants.PPM, yo / Constants.PPM);
		def.fixedRotation = false;
		pBody = world.createBody(def);
		CircleShape shape = new CircleShape();
		shape.setRadius(2 / Constants.PPM);
		// здесь заключена вся магия
		FixtureDef fd = new FixtureDef();
		// упругость
		fd.restitution = 1.0f;
		// плотность
		fd.density = 5.0f;
		// трение
		fd.friction = 0.01f;
		fd.shape = shape;
		pBody.createFixture(fd);
		def.bullet = true;
		shape.dispose();
		return pBody;
	}
}

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