Android Open Source - raycaster Raycaster

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License

The source code is released under:

Copyright (c) 2014 Fredrik Wallgren Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the...

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Java Source Code

package me.ramblingsby.raycaster;
/*from w w w .  j  av  a2s .c o  m*/
import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.math.Rectangle;
import com.badlogic.gdx.math.Vector2;

public class Raycaster extends ApplicationAdapter {
  protected static final double CIRCLE = Math.PI * 2;

  private Player player;
  private Map map;
  private Controls controls;
  private Camera camera;

  private float seconds = 0;

  private static final int VIRTUAL_WIDTH = 1024;
  private static final int VIRTUAL_HEIGHT = 640;
  private static final float ASPECT_RATIO = (float)VIRTUAL_WIDTH/(float)VIRTUAL_HEIGHT;
  private Rectangle viewport;
  private float scale = 1f;
  private OrthographicCamera orthoCamera;

  @Override
  public void create () {
    // Setup 2d camera with top left coordinates
    // http://stackoverflow.com/questions/7708379/changing-the-coordinate-system-in-libgdx-java/7751183#7751183
    // This forces us to flip textures on the y axis, eg. in Camera#drawSky
    orthoCamera = new OrthographicCamera(VIRTUAL_WIDTH, VIRTUAL_HEIGHT);
    orthoCamera.setToOrtho(true, VIRTUAL_WIDTH, VIRTUAL_HEIGHT);
    
    this.player = new Player(15.3, -1.2, Math.PI * 0.3);
    this.map = new Map(32);
    this.controls = new Controls();
    this.camera = new Camera(orthoCamera, 320, Math.PI * 0.4);

    this.map.randomize();
  }

  @Override
  public void resize(int width, int height) {
    // calculate new viewport
    float aspectRatio = (float)width/(float)height;

    Vector2 crop = new Vector2(0f, 0f);
    if(aspectRatio > ASPECT_RATIO)
    {
      scale = (float)height/(float)VIRTUAL_HEIGHT;
      crop.x = (width - VIRTUAL_WIDTH*scale)/2f;
    }
    else if(aspectRatio < ASPECT_RATIO)
    {
      scale = (float)width/(float)VIRTUAL_WIDTH;
      crop.y = (height - VIRTUAL_HEIGHT*scale)/2f;
    }
    else
    {
      scale = (float)width/(float)VIRTUAL_WIDTH;
    }

    float w = (float)VIRTUAL_WIDTH*scale;
    float h = (float)VIRTUAL_HEIGHT*scale;
    viewport = new Rectangle(crop.x, crop.y, w, h);
  }

  @Override
  public void render () {
    if(Gdx.input.isKeyPressed(Input.Keys.ESCAPE)) {
      Gdx.app.exit();
    }

    Gdx.gl.glClearColor(0, 0, 0, 1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

    orthoCamera.update();
    Gdx.gl.glViewport((int) viewport.x, (int) viewport.y, (int) viewport.width, (int) viewport.height);

    seconds = Gdx.graphics.getDeltaTime();

    map.update(seconds);
    controls.update();
    player.update(controls, map, seconds);
    camera.render(player, map);
  }
}

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