Android Open Source - OpenGlDraw_Android Fire Engine

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License

The source code is released under:

GNU General Public License

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Java Source Code

package com.example.opengldraw.shapes;
//from  w w w.  j av a  2s .  c  om
import java.util.Random;

import android.graphics.Bitmap;
import android.graphics.Color;

public class FireEngine extends Object {
  
  private Bitmap bitmapFire;
  private int[] arrayColors;
  private static int cycle = 0;
  private Random rand;

  public FireEngine() {
    super();
    rand = new Random();
  }
  
  public Bitmap getFireBitmat() {
    arrayColors = new int[10000];
    seed();
    for(int x = 100; x < 10000; x++) {
      arrayColors[x] = Color.argb(0, 0, 0, 0);
    }
    bitmapFire = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);//Bitmap.createBitmap(arrayColors, 0, 100, 100, 100, Bitmap.Config.ARGB_8888);
    bitmapFire.setPixels(arrayColors, 0, 100, 0, 0, 100, 100);
    return bitmapFire;
  }
  
  public Bitmap morphBitmap() {
    int random = rand.nextInt(100);
    while(random < 70) {random = rand.nextInt(120);}
    if(cycle < random) {
      for(int x = 101; x < 10000; x++) {
        int left = x - 1;
        int right = x + 1;
        if(right > 9999) {right = 9999;}
            
        int alpha = Color.alpha(arrayColors[x]);
        int alphaLeft = Color.alpha(arrayColors[left]);
        int alphaRight = Color.alpha(arrayColors[right]);
        int alphaPrevRow = Color.alpha(arrayColors[x-100]);
        int avg = (alpha + alphaPrevRow + alphaLeft + alphaRight) / 4;
        arrayColors[x] = Color.argb(avg, 255, 255, 255);
      }
      cycle++;
    } else {
      for(int x = 101; x < rand.nextInt(300); x++) {
        arrayColors[x] = Color.argb(rand.nextInt(255), 255, 255, 255);
      }
      seed();
      cycle = 0;
    }
    //bitmapFire = Bitmap.createBitmap(arrayColors, 0, 100, 100, 100, Bitmap.Config.ARGB_8888);
    bitmapFire.setPixels(arrayColors, 0, 100, 0, 0, 100, 100);
    return bitmapFire;
  }
  
  private void seed() {
    int rand1 = rand.nextInt(95);
    int rand2 = rand.nextInt(95);
    if(rand1 < rand2) {
      for(int x = rand1; x < rand2; x++) {
        arrayColors[x] = Color.argb(255, 255, 255, 255);
      }
      for(int x = 0; x < rand1; x++) {
        arrayColors[x] = Color.argb(0, 255, 255, 255);
      }
      for(int x = rand2; x < 100; x++) {
        arrayColors[x] = Color.argb(0, 255, 255, 255);
      }
    } else {
      for(int x = rand2; x < rand1; x++) {
        arrayColors[x] = Color.argb(255, 255, 255, 255);
      }
      for(int x = 0; x < rand2; x++) {
        arrayColors[x] = Color.argb(0, 255, 255, 255);
      }
      for(int x = rand1; x < 100; x++) {
        arrayColors[x] = Color.argb(0, 255, 255, 255);
      }
    }
  }
}

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