Android Open Source - min3d Example Transparent Gl Surface

• Back to OpenGL/library  ↑

From Project

Back to project page min3d.

License

The source code is released under:

MIT License

Java Source Code

package com.min3d;
//  w w  w . j a  v a2s. co m
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.view.View;

import com.min3d.lib.core.RendererActivity;
import com.min3d.lib.objectPrimitives.Box;
import com.min3d.lib.vos.Light;

/**
 * Example of implementing a transparent GLSurfaceView.
 * 
 *   (a) Override glSurfaceViewConfig() to configure glSurfaceView for transparency as shown
 *   (b) Set the scene's backgroundColor to 0x00000000 (black with 0-alpha) 
 * 
 * If you were to place any 2D elements (images, etc) in the Activity "behind" glSurface,
 * they would be now visible.
 * 
 * In this example, instead of doing that, the Activity itself is set to transparent,  
 * allowing the underlying Activity to show through... (See the manifest xml -- 
 * "android:theme="@android:style/Theme.Translucent.NoTitleBar")
 * 
 * @author Lee
 */
public class ExampleTransparentGlSurface extends RendererActivity
{
  private final int NUM = 25;
  
  private Box[] boxes;

  
    @Override 
  protected void glSurfaceViewConfig()
    {
    // !important
        _glSurfaceView.setEGLConfigChooser(8,8,8,8, 16, 0);
        _glSurfaceView.getHolder().setFormat(PixelFormat.TRANSLUCENT);
    }
  
  @Override
  public void initScene() 
  {
    // !important
    scene.backgroundColor().setAll(0x00000000);

    Light light = new Light();
      scene.lights().add(light);

    boxes = new Box[NUM];
    for (int i = 0; i < NUM; i++) {
      Box box = new Box(0.5f,0.5f,0.5f);
      box.vertexColorsEnabled(false);
      box.position().x = (float) (-1.5 + Math.random()*3);
      box.position().y = (float) (-4 + Math.random()*8);
      box.position().z = (float) (-1.5 + Math.random()*3);
      box.rotation().x = (float) (Math.random()*360);
      box.rotation().y = (float) (Math.random()*360);
      boxes[i] = box;
         scene.addChild(box);
    }
  }

  @Override 
  protected void onCreate(Bundle savedInstanceState) 
  {
    super.onCreate(savedInstanceState);
    
    _glSurfaceView.setOnClickListener( 
      new View.OnClickListener() {
          public void onClick(View v) {
            finish();
          }
      }
    );
  }
  
  @Override 
  public void updateScene() 
  {
    for (int i = 0; i < NUM; i++) {
      boxes[i].rotation().x += 2;
      boxes[i].rotation().y += 1;
      boxes[i].position().y -= .075;
      if (boxes[i].position().y < -4) {
        boxes[i].position().y = 4;
        boxes[i].position().x = (float) (-1.5 + Math.random()*3);
        boxes[i].position().z = (float) (-1.5 + Math.random()*3);
      }
    }
  }  
}

Java Source Code List

• Back to OpenGL/library  ↑