Android Open Source - min3d Example Light Properties

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License

The source code is released under:

MIT License

Java Source Code

package com.min3d;
/*  www.  j  av a2  s  .  com*/
import android.util.Log;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.LinearLayout;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;

import com.min3d.lib.core.Object3dContainer;
import com.min3d.lib.core.RendererActivity;
import com.min3d.lib.objectPrimitives.Box;
import com.min3d.lib.objectPrimitives.Sphere;
import com.min3d.lib.vos.Light;
import com.min3d.lib.vos.LightType;
import com.min3d.lib.vos.Number3d;

/**
 * Light properties explorer.
 * Position, direction, spotCutoff, spotExpo, type, visibility... 
 * 
 * Can also be used as a testbed for other parameter-related testing. 
 * 
 * @author Lee
 */
public class ExampleLightProperties extends RendererActivity
{
  Object3dContainer _rect;
  Object3dContainer _obj;
  Light _light;
  
  
  @Override
  protected void onCreateSetContentView()
  {
    setContentView(R.layout.lightproperties_layout);
    
    // Add OpenGL surface
        LinearLayout ll = (LinearLayout) this.findViewById(R.id.scene1Holder);
        ll.addView(_glSurfaceView);
  }
  
  @Override
    public void onInitScene()
  {
        // Add seekbar listeners
        int[] ids = { R.id.seekbarA1, R.id.seekbarA2, R.id.seekbarA3, R.id.seekbarB1, R.id.seekbarB2, R.id.seekbarB3, R.id.seekbarC1, R.id.seekbarC2 };

        for (int id : ids)
        {
            SeekBar b;
            b = (SeekBar) this.findViewById(id);
            b.setProgress(50);
            b.setOnSeekBarChangeListener(seekChange);
        }
        
        // Add checkbox listeners
        int[] ids2 = { R.id.cbx1, R.id.cbx2 };
        
        for (int id : ids2)
        {
            CheckBox ck = (CheckBox) this.findViewById(id);
            ck.setOnCheckedChangeListener(checkChange);
        }
        
        // Set some defaults
        CheckBox c1 = (CheckBox) this.findViewById(R.id.cbx1);
        c1.setChecked(true);
        
        CheckBox c2 = (CheckBox) this.findViewById(R.id.cbx2);
        c2.setChecked(true);
        
        SeekBar sB3 = (SeekBar) this.findViewById(R.id.seekbarB3);
        sB3.setProgress(100); // pointing away from camera
        
        SeekBar sAngle = (SeekBar) this.findViewById(R.id.seekbarC1);
        sAngle.setProgress(33); // some angle
        
        SeekBar sExp = (SeekBar) this.findViewById(R.id.seekbarC2);
        sExp.setProgress(45); // cutoff
  }
  
    OnSeekBarChangeListener seekChange = new OnSeekBarChangeListener() 
    {
      public void onProgressChanged(SeekBar $s, int $progress, boolean $touch)
      {
        float n = (float)$progress/100f;
        n = (n - 0.5f) * 2f;
        
        switch($s.getId())
        {
          case R.id.seekbarA1:
            _light.position.setX(n*3);
            break;
          case R.id.seekbarA2:
            _light.position.setY(n*3);
            break;
          case R.id.seekbarA3:
            _light.position.setZ(n*3); // +3 + n*6);
            break;
            
          case R.id.seekbarB1:
            //_light.spotDirection.setX(n);
            scene.camera().position.x = n*10;
            break;
          case R.id.seekbarB2:
            //_light.spotDirection.setY(n);
            scene.camera().position.y = n*10;
            break;
          case R.id.seekbarB3:
            //_light.spotDirection.setZ(n);
            scene.camera().position.z = n*10;
            break;
            
          case R.id.seekbarC1:
            n += 1; //[0,2]
            n *= 45+4;
            if (n > 90) n = 180;
            _light.spotCutoffAngle(n);
            Log.v("x", "cutoff " + n);
            break;
            
          case R.id.seekbarC2:
            n += 1; //[0,2]
            n *= 22; // [0,44]
            n -= 4; // [-4,40]
            if (n < 0) n = 0;
            _light.spotExponent(n);
            Log.v("x", "exp " + n);
            break;
        }

        Log.v("x", "campos" + scene.camera().position.toString());

        if (_light.position.isDirty())
        {
          Log.v("x", "pos " + _light.position.toString());          
        }
        
        if (_light.direction.isDirty())
        {
          Number3d n3 = _light.direction.toNumber3d();
          n3.normalize();
          _light.direction.setAllFrom(n3);
          Log.v("x", "dir " + _light.direction.toString());
        }
      }
      
      
      public void onStartTrackingTouch(SeekBar $s)
      {
        
      }
      public void onStopTrackingTouch(SeekBar $s)
      {
        
      }
    };
    
    OnCheckedChangeListener checkChange = new OnCheckedChangeListener() 
    {
    public void onCheckedChanged(CompoundButton $ck, boolean isChecked) 
    {
      switch($ck.getId())
      {
        case R.id.cbx1:
          if (isChecked)
            _light.type(LightType.DIRECTIONAL);
          else
            _light.type(LightType.POSITIONAL);
          Log.v("x", "light is now " + _light.type() + _light.type().glValue());
          break;
          
        case R.id.cbx2:
          _light.isVisible(isChecked);
          Log.v("x", "light visible: " + _light.isVisible());
          break;
      }
    }
  };
    
    //
  
  public void initScene() 
  {
    scene.backgroundColor().setAll(0xff222222);

    _light = new Light();
    _light.position.setAll(0, 0, +3);
    _light.diffuse.setAll(255, 255, 255, 255);
    _light.ambient.setAll(0, 0, 0, 0);
    _light.specular.setAll(0, 0, 0, 0);
    _light.emissive.setAll(0, 0, 0, 0);
    scene.lights().add(_light);

    _rect = new Box(6, 6, .1f);
    _rect.position().z = -3;
    scene.addChild(_rect);
    
    _obj = new Sphere(1.5f, 20,20);
    scene.addChild(_obj);
  }

  @Override 
  public void updateScene() 
  {
    //_rect.rotation().y+=0.33;
  }
  
  @Override 
  public void onUpdateScene()
  {
  }
  
}

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