Android Open Source - min3d Example Assigning Textures Dynamically

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License

The source code is released under:

MIT License

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Java Source Code

package com.min3d;
/*ww w .  ja va2  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;

/**
 * Shows how objects can be assigned textures dynamically.
 * 
 * Also demonstrates how the same "textureId" can be assigned to multiple objects 
 * (rather than, say, needing to create two instances of a texture 
 * for two separate objects) 
 */
public class ExampleAssigningTexturesDynamically extends RendererActivity
{
  Object3dContainer _object1;
  Object3dContainer _object2;
  
  TextureVo _jupiterTexture;
  TextureVo _earthTexture;
  TextureVo _moonTexture;
  
  int _count;
  
  
  public void initScene() 
  {
    scene.lights().add(new Light());
    
    // Add three textures to TextureManager 
    
    Bitmap b;
    
    b = Utils.makeBitmapFromResourceId(R.drawable.jupiter);
    Shared.textureManager().addTextureId(b, "jupiter", false);
    b.recycle();
    
    b = Utils.makeBitmapFromResourceId(R.drawable.earth);
    Shared.textureManager().addTextureId(b, "earth", false);
    b.recycle();
    
    b = Utils.makeBitmapFromResourceId(R.drawable.moon);
    Shared.textureManager().addTextureId(b, "moon", false);
    b.recycle();
    
    // Create three TextureVo's
    
    _jupiterTexture = new TextureVo("jupiter");
    _earthTexture = new TextureVo("earth");
    _moonTexture = new TextureVo("moon");
    
    _object1 = new Sphere(0.8f, 15, 10);
    _object1.position().y = 0.9f;
    scene.addChild(_object1);

    _object2 = new Sphere(0.8f, 15, 10);
    _object2.position().y = -0.9f;
    scene.addChild(_object2);
    
    _count = 0;
  }
  
  @Override 
  public void updateScene() 
  {
    _count++;
    
    // Assign a different texture to the two objects
    // every second or so
    
    if (_count % 240 == 0) {
      _object1.textures().clear(); // ie, no texture
      _object2.textures().clear();
    }
    else if (_count % 240 == 60) { 
      _object1.textures().addReplace(_jupiterTexture);
      _object2.textures().addReplace(_jupiterTexture);
    }
    else if (_count % 240 == 120) { 
      _object1.textures().addReplace(_earthTexture);
      _object2.textures().addReplace(_earthTexture);
    }
    else if (_count % 240 == 180) { 
      _object1.textures().addReplace(_moonTexture);
      _object2.textures().addReplace(_moonTexture);
    }
    
    _object1.rotation().y +=1;
    _object2.rotation().y -=1;
  }
}

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