Android Open Source - min3d Example Texture Offset

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License

The source code is released under:

MIT License

Java Source Code

package com.min3d;
/*from w w  w  .ja v a  2 s .c  o m*/
import android.graphics.Bitmap;

import com.min3d.lib.Shared;
import com.min3d.lib.Utils;
import com.min3d.lib.core.Object3dContainer;
import com.min3d.lib.core.RendererActivity;
import com.min3d.lib.objectPrimitives.Sphere;
import com.min3d.lib.vos.Light;
import com.min3d.lib.vos.TextureVo;

import javax.microedition.khronos.opengles.GL10;

/**
 * Demonstrates use of offset properties of TextureVo.
 * 
 * We have a alpha PNG of a cloud layer, which is added as a second texture to the earth sphere.
 * While the earth rotates from 'left to right', we're changing the "offsetU" of the cloud layer
 * so the texture moves from right to left slightly frame by frame.  
 *   
 * @author Lee
 */
public class ExampleTextureOffset extends RendererActivity
{
  Object3dContainer _earth;
  TextureVo _cloudTexture;

  int _count = 0;


  public void initScene() 
  {
    Light light = new Light();
    light.ambient.setAll((short)64, (short)64, (short)64, (short)255);
    light.position.setAll(3, 3, 3);
    scene.lights().add(light);

    _earth = new Sphere(1.2f, 15, 10);
    scene.addChild(_earth);

    Bitmap b = Utils.makeBitmapFromResourceId(this, R.drawable.earth);
    Shared.textureManager().addTextureId(b, "jupiter", false);
    b.recycle();

    b = Utils.makeBitmapFromResourceId(this, R.drawable.clouds_alpha2b);
    Shared.textureManager().addTextureId(b, "clouds", false);
    b.recycle();

    TextureVo t = new TextureVo("jupiter");
    _earth.textures().add(t);

    _cloudTexture = new TextureVo("clouds");
    _cloudTexture.textureEnvs.get(0).param = GL10.GL_DECAL; 
    _cloudTexture.repeatU = true; // .. this is the default, but just to be explicit

    _earth.textures().add(_cloudTexture);

    _count = 0;
  }
  
  @Override 
  public void updateScene() 
  {
    _earth.rotation().y += 1.0f;
    
    // Animate texture offset
    _cloudTexture.offsetU += 0.001f;    
    
    _count++;
  }
}

Java Source Code List

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