Android Open Source - DivisionByZero Bullet Manager

• Back to Game/defence  ↑

From Project

Back to project page DivisionByZero.

License

The source code is released under:

Apache License

Java Source Code

package com.ggstudios.divisionbyzero;
//from   ww w.  j a v  a 2  s . c  om
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

import android.opengl.GLES20;

import com.ggstudios.utils.BufferUtils;
import com.ggstudios.utils.DebugLog;

public class BulletManager extends DrawableCollection<Bullet> {
  private static final String TAG = "BulletManager";
  
  private VBO bulletVbo;
  private int capacity;
  
  public BulletManager() {
    bulletVbo = new VBO();
  }
  
  public void loadGlData() {
    final float w = Core.MAP_SDP * 0.1f;
    final float[] vertices = {
      -w, -w,
      w, -w,
      -w, w,
      w, w
    };
    
    bulletVbo.setVBO(w * 2.0f, w * 2.0f, 
        BufferUtils.copyToBuffer(vertices), VBO.Alignment.CENTER);
  }
  
  public void growPool(int size) {
    capacity = capacity + size;
    
    for(int i = len; i < capacity; i++) {
      Bullet b = new Bullet(0, 0);
      drawables.add(b);
    }
  }
  
  /**
   * Attempts to grab a unused instance of a bullet and entire it into
   * the drawing pool. The PictureBox returned will be initially invisible.
   * The caller should set the properties of the object first, then
   * reinstate the object by making it visible.
   * 
   * If there are non left, the bullet pool size will be increased.
   * @return A bullet drawable object.
   */
  public Bullet obtain() {
    Bullet b = drawables.get(len++);
    b.isVisible = false;
    b.setVBO(bulletVbo);
    
    return b;
  }
  
  @Override
  public void addDrawable(Bullet d) {
    DebugLog.e(TAG, "Error. Do not call add drawable on this object." +
        " Call obtain() instead.");
  }

  public void setBulletBounds(float l, float t, float r, float b) {
    Bullet.setBounds(l, t, r, b);
  }
  
  @Override
  public void draw(float offX, float offY) {
    GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE);
    super.draw(offX, offY);
    Core.gr.resetBlendFunc();
  }
  
  @Override
  public void refresh(){
    loadGlData();
    super.refresh();
  }
  
  public void writeToStream(DataOutputStream stream) throws IOException {
    final int len = size();
    stream.writeInt(len);
    for(int i = 0; i < len; i++) {
      Bullet b = get(i);
      b.writeToStream(stream);
    }
  }
  
  public void readFromStream(DataInputStream stream) throws IOException {
    final int len = stream.readInt();
    for(int i = 0; i < len; i++) {
      Bullet b = obtain();
      b.loadFromStream(stream);
      b.isVisible = true;
      
      Core.gu.addGameUpdatable(b);
    }
  }
}

Java Source Code List

• Back to Game/defence  ↑