Android Open Source - min3d Example Multiple Lights

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License

The source code is released under:

MIT License

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Java Source Code

package com.min3d;
/*from  ww w . ja va2 s .  co m*/
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;

/**
 * @author Lee
 */
public class ExampleMultipleLights extends RendererActivity
{
  private final float DEGREE = (float)(Math.PI/180);

  Object3dContainer _sphere;
  
  Light _lightRed;
  Light _lightGreen;
  Light _lightBlue;
  Object3dContainer _boxRed;
  Object3dContainer _boxGreen;
  Object3dContainer _boxBlue;

  int _count = 0;


  public void initScene() 
  {
    scene.camera().position.setAll(0,0,5);

    // Add three lights
    
    _lightRed = new Light();
    _lightRed.ambient.setAll(0x88110000);
    _lightRed.diffuse.setAll(0xffff0000);
    _lightRed.type(LightType.POSITIONAL);
    scene.lights().add(_lightRed);

    _lightGreen = new Light();
    _lightGreen.ambient.setAll(0x88001100);
    _lightGreen.diffuse.setAll(0xff00ff00);
    _lightGreen.type(LightType.POSITIONAL);
    scene.lights().add(_lightGreen);

    _lightBlue = new Light();
    _lightBlue.ambient.setAll(0x88000011);
    _lightBlue.diffuse.setAll(0xff0000ff);
    _lightBlue.type(LightType.POSITIONAL); 
    scene.lights().add(_lightBlue);

    // The objects that we'll light up
    
    _sphere = new Sphere(1.0f, 20, 15);
    _sphere.vertexColorsEnabled(false);
    scene.addChild(_sphere);
    
    // Boxes, displayed just as a visualization aid
    
    _boxRed = new Box(0.05f,0.05f,0.05f);
    _boxRed.normalsEnabled(false);
    _boxRed.vertexColorsEnabled(false);
    _boxRed.defaultColor().setAll(0xaaff0000);
    scene.addChild(_boxRed);
    
    _boxGreen = new Box(0.07f,0.07f,0.07f);
    _boxGreen.normalsEnabled(false);
    _boxGreen.vertexColorsEnabled(false);
    _boxGreen.defaultColor().setAll(0xaa00ff00);
    scene.addChild(_boxGreen);

    _boxBlue = new Box(0.05f,0.05f,0.05f);
    _boxBlue.normalsEnabled(false);
    _boxBlue.vertexColorsEnabled(false);
    _boxBlue.defaultColor().setAll(0xaa0000ff);
    scene.addChild(_boxBlue);

    _count = 0;
  }
  
  @Override 
  public void updateScene() 
  {
    // Set lights' position
    
    _lightRed.position.setAll(0, +0.9f, 2.5f);
    float x = (float)(Math.sin(_count%360 * DEGREE) * -1.5f);
    float z = (float)(Math.cos(_count%360 * DEGREE) * 2.25f);
    _lightGreen.position.setAll(x, 0, z);
    _lightBlue.position.setAll(0, -0.9f, 2.5f);
    
    // Sync boxes' position with lights
    
    _boxRed.position().setAllFrom(_lightRed.position.toNumber3d());
    _boxGreen.position().setAllFrom(_lightGreen.position.toNumber3d());
    _boxBlue.position().setAllFrom(_lightBlue.position.toNumber3d());

    // Red light pulses by changing diffuse red property
    
    short mag = (short)(255 - (_count % 60) * (255/60));
    _lightRed.diffuse.r(mag);
    _boxRed.defaultColor().r = mag;

    // Green light blinks on and off using isVisible() property
    
    if (_count % 30 == 0) {
      _lightGreen.isVisible(true);
      _boxGreen.isVisible(true);
    }
    else if (_count % 30 == 20) {
      _lightGreen.isVisible(false);
      _boxGreen.isVisible(false);
    }

    _sphere.rotation().y += 1;
    _count++;
  }
}

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