Android Open Source - min3d Example Vertices Variations

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MIT License

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Java Source Code

package com.min3d;
/*from w ww .j  a  va2  s.co  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.Box;
import com.min3d.lib.vos.Color4;
import com.min3d.lib.vos.Light;

/**
 * Demonstrates use of Object3D's constructor parameters "useUvs", "useNormals", and "useColors".
 * These params are passed to the Object3D's MeshData instance to determine whether the object's
 * vertices will include texture coordinate, normal, and color data (By default, itwill).
 * 
 * It's useful to set these to false when you know you won't need them,  
 * for the sake of memory and performance. 
 * 
 * Note that the Object3d properties "texturesEnabled", "normalsEnabled", and "colorsEnabled" 
 * are only applicable when the Object3d is created with "useUvs", "useNormals", and "useColors"
 * respectively are set to true. 
 * 
 * @author Lee
 */
public class ExampleVerticesVariations extends RendererActivity
{
  Object3dContainer _cube1;
  Object3dContainer _cube2;
  Object3dContainer _cube3;
  Object3dContainer _cube4;
  
  public void initScene() 
  {
    scene.lights().add(new Light());
    
    Color4[] colors = new Color4[6];
    colors[0] = new Color4(255,0,0,255);
    colors[1] = new Color4(0,255,0,255);
    colors[2] = new Color4(0,0,255,255);
    colors[3] = new Color4(255,255,0,255);
    colors[4] = new Color4(0,255,255,255);
    colors[5] = new Color4(255,0,255,255);

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

    // _cube1's vertices contain color data, but not U/V or normal data.
    // The result is an unshaded box, with a different color on each side.

    _cube1 = new Box(.6f,.6f,.6f, colors,  false,false,true);
    _cube1.normalsEnabled(false);
    _cube1.position().y = 1.2f;

    // _cube2's verticies contain uv data, but not normal or color data.
    // The result is an unshaded box with a texture on each side.
    
    _cube2 = new Box(.6f,.6f,.6f, colors,  true,false,false);
    _cube2.position().y = .4f;
    _cube2.textures().addById("uglysquares");
    
    // _cube3's verticies contain uv and normal data, but not color data  
    // The result is an shaded box with a texture on each side.
    // The Scene must of course contain a light for the object to be visible.
    
    _cube3 = new Box(.6f,.6f,.6f, null,  true,true,false);
    _cube3.position().y = -.4f;
    _cube3.textures().addById("uglysquares");
    
    // _cube4's verticies contain neither uv, normal, or color data (in other words, just position data) 
    // Since it does not use per-vertex color data, the Object3's defaultColor property
    // will dictate the object's color.
    // The result is an unshaded box which is one solid color (red);
    
    _cube4 = new Box(.6f,.6f,.6f, colors,  false,false,false);
    _cube4.defaultColor().setAll(0xffff0000);
    _cube4.position().y = -1.2f;

    scene.addChild(_cube1);
    scene.addChild(_cube2);
    scene.addChild(_cube3);
    scene.addChild(_cube4);
  }

  @Override 
  public void updateScene() 
  {
    _cube1.rotation().y++;
    _cube2.rotation().y++;
    _cube3.rotation().y++;
    _cube4.rotation().y++;
  }
}

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