Pong

MyGdxGame.java

package com.mygdx.game;

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input;
import com.badlogic.gdx.InputProcessor;
import com.badlogic.gdx.graphics.GL20;
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.Vector2;

public class MyGdxGame extends ApplicationAdapter{
	SpriteBatch batch;

    Texture texture;
    Sprite Ball;
    Sprite Paddle;
    Sprite Paddle2;

    int PaddleSpeed;
    float Paddle2Speed;

    Vector2 ballVelocity;

    Sprite[] Sprites;

	@Override
	public void create () {

		batch = new SpriteBatch();

        texture = new Texture("ball.png");
        Ball = new Sprite(texture);
        Ball.setSize(16,16);
        Ball.setPosition(Gdx.graphics.getWidth()/2,Gdx.graphics.getHeight()/2);

        Paddle = new Sprite(texture);
        Paddle.setPosition(0, Paddle.getHeight()/2);
        Paddle.setSize(8,128);

        Paddle2 = new Sprite(texture);
        Paddle2.setPosition(Gdx.graphics.getWidth() - Paddle.getWidth(),0);
        Paddle2.setSize(8,128);


        ballVelocity = new Vector2(-3,1);

        Sprites = new Sprite[]{Ball,Paddle,Paddle2};
	}

	@Override
	public void render () {
		Gdx.gl.glClearColor(0, 0, 0, 0);
		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        updateBall();
        updatePaddle();
        updatePaddle2();


		batch.begin();
        for(int i = 0;i < Sprites.length;i++){
            Sprites[i].draw(batch);
        }
		batch.end();

	}

    void updatePaddle(){
        if(Gdx.input.isKeyPressed(Input.Keys.A)){
            PaddleSpeed = 3;

        }
        if(Gdx.input.isKeyPressed(Input.Keys.Z)){
            PaddleSpeed = -3;

        }
        if(!Gdx.input.isKeyPressed(Input.Keys.A) && !Gdx.input.isKeyPressed(Input.Keys.Z))
            PaddleSpeed = 0;

        Paddle.setY(Paddle.getY() + PaddleSpeed);
    }

    void updateBall(){
        if(overlapPaddle()){
             ballVelocity.x *= -1;
            ballVelocity.x += 1/ballVelocity.x;

        }

        Ball.setPosition(Ball.getX() + ballVelocity.x,Ball.getY() + ballVelocity.y);

        if(Ball.getY() + ballVelocity.y < 0 || Ball.getY() + ballVelocity.y > Gdx.graphics.getHeight()){
            ballVelocity.y *= -1;

        }
        if(Ball.getX() < 0 || Ball.getX() + Ball.getWidth() > Gdx.graphics.getWidth()){
           Ball.setPosition(Gdx.graphics.getWidth()/2,Gdx.graphics.getHeight()/2);
            ballVelocity.x = -3;
        }

        if(ballVelocity.y > 5  )ballVelocity.y--;




    }

    boolean overlapPaddle(){
        if(Ball.getX() <= Paddle.getWidth()){
            if(Ball.getY() + Ball.getHeight() >= Paddle.getY()  && Ball.getY() <=  Paddle.getY() + Paddle.getHeight()){
                ballVelocity.y += PaddleSpeed/2;
                return true;
            }
        } else if(Ball.getX() + Ball.getWidth() + ballVelocity.x >= Gdx.graphics.getWidth() - Paddle2.getWidth()){
            if(Ball.getY()  + Ball.getHeight() >= Paddle2.getY() && Ball.getY() <= Paddle2.getY() + Paddle2.getHeight()){
                ballVelocity.y += Paddle2Speed/2;
                return true;
            }

        }
        return false;
    }

    void updatePaddle2(){
        if(Ball.getY() +3 >= Paddle2.getY() + Paddle2.getHeight()/2){
            Paddle2Speed = 0.1f*((Ball.getY() + Ball.getHeight()/2)-(Paddle2.getY() + Paddle2 .getHeight()/2));
        }else if( Ball.getY() -3 <= Paddle2.getY() + Paddle2.getHeight()/2){
            Paddle2Speed = 0.1f*((Ball.getY() + Ball.getHeight()/2)-(Paddle2.getY() + Paddle2 .getHeight()/2));
        }
        Paddle2.setPosition(Paddle2.getX(),Paddle2.getY() + Paddle2Speed);
    }
}