Android Open Source - Avoidance Hud Render System

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License

The source code is released under:

GNU General Public License

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Java Source Code

/* 
 * Copyright (c) 2012 Jakob Svensson//w ww .java 2s. c  o m
 * 
 * This file is part of Avoidance.
 * 
 * Avoidance is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Avoidance is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Avoidance.  If not, see <http://www.gnu.org/licenses/>. 
 *  
 */

package se.chalmers.avoidance.core.systems;

import org.andengine.entity.scene.Scene;
import org.andengine.entity.text.Text;
import org.andengine.opengl.font.Font;
import org.andengine.opengl.vbo.VertexBufferObjectManager;

import se.chalmers.avoidance.core.components.Score;
import se.chalmers.avoidance.core.components.Time;
import se.chalmers.avoidance.util.ScreenResolution;

import com.artemis.Aspect;
import com.artemis.ComponentMapper;
import com.artemis.Entity;
import com.artemis.systems.EntityProcessingSystem;

/**
 * System for handling rendering of the heads-up display.
 * 
 * @author Jakob Svensson
 * 
 */
public class HudRenderSystem extends EntityProcessingSystem {

  private Font font;
  private Text scoreText;
  private Text timeText;
  private Scene scene;
  private VertexBufferObjectManager vbom;
  private ComponentMapper<Time> timeMapper;
  private ComponentMapper<Score> scoreMapper;

  /**
   * Construct a new HudRenderSystem.
   * 
   * @param scene
   *            The scene of the game
   * @param vbom
   *            A VertexBufferObjectManager
   * @param font
   *            The font of the score text
   */
  public HudRenderSystem(Scene scene, VertexBufferObjectManager vbom,
      Font font) {
    super(Aspect.getAspectForAll(Time.class, Score.class));
    this.font = font;
    this.scene = scene;
    this.vbom = vbom;
  }

  /**
   * This method is called when the system is initialized.
   */
  @Override
  protected void initialize() {
    timeMapper = world.getMapper(Time.class);
    scoreMapper = world.getMapper(Score.class);
    scoreText = new Text(ScreenResolution.getWidthResolution() * 4 / 5, 30,
        this.font, "Score :", "Score: XXXXX".length(), vbom);
    timeText = new Text(30, 30, this.font, "Time :",
        "Time: XXXXX".length(), vbom);
    scene.attachChild(scoreText);
    scene.attachChild(timeText);
    scoreText.setZIndex(100);
    timeText.setZIndex(100);
  }

  /**
   * Determines if the system should be processed or not.
   * 
   * @return true if system should be processed, false if not
   */
  @Override
  protected boolean checkProcessing() {
    return true;
  }

  /**
   * Processes entities.
   * 
   * @param entity
   *            the entity to be processed
   */
  @Override
  protected void process(Entity entity) {
    Time time = timeMapper.get(entity);
    Score score = scoreMapper.get(entity);
    time.updateTime(world.getDelta());
    timeText.setText("Time: " + Math.round(time.getTime()) / 60 + "m "
        + Math.round(time.getTime()) % 60 + "s");
    scoreText.setText("Score :"
        + (Math.round(time.getTime()) * 10 + score.getScore()));
  }

}

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