texturegroup.java

来自「Java mulitplayer strategy game. Adaptati」· Java 代码 · 共 140 行

/*
 * Created on 2005-10-04.
 * $Id: TextureGroup.java,v 1.7 2005/10/31 00:15:45 overmindx Exp $
 */
package net.sf.jawp.j3d.texture;

import java.awt.Image;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Random;

import javax.imageio.ImageIO;
import javax.media.j3d.Texture;

import net.sf.jawp.util.Log;

import org.jdom.Element;




import com.sun.j3d.utils.image.TextureLoader;

/**
 * TODO maciekm (2005-10-04) comment this type!
 * 
 * <p>
 * <b>Latest changed:</b><br/> $Date: 2005/10/31 00:15:45 $ $Author: overmindx $
 * </p>
 * 
 * @author Maciej Malecki
 * @version $Revision: 1.7 $
 */
public final class TextureGroup
{
	private static final Log LOG = Log.getLog(TextureGroup.class);
	
	private final String name;

	private final Map<String, Texture> textures = new HashMap<String, Texture>();

	private final Random rnd = new Random(System.currentTimeMillis());

	private final Map<String, Image> images = new HashMap<String, Image>();
	
	TextureGroup(final Element configNode)
	{
		this.name = configNode.getAttributeValue("id");
		
		final List textureNodes = configNode.getChildren("texture");
		for (Object obj : textureNodes)
		{
			final Element textureNode = (Element) obj;
			final String id = textureNode.getAttributeValue("id");
			final String fileName = textureNode.getAttributeValue("file");
			try
			{
				loadTexture(id, fileName);
			}
			catch ( final IOException ioe)
			{
				LOG.error( ioe, ioe);
				//texture is not loaded ... is it error?
			}
		}
	}

	/**
	 * Returns number of textures defined within this group.
	 * @return number of textures defined within group.
	 */
	public int getCount()
	{
		return textures.size();
	}

	public Texture getTexture(final String id)
	{
		final Texture tex = textures.get(id);
		if (tex == null)
		{
			throw new NoSuchElementException("Texture " + id + " not found in group " + name);
		}
		return tex;
	}

	public Image getImage(final String id)
	{
		return this.images.get(id);
	}
	
	public Texture getRandomTexture()
	{
		final int max = textures.size();
		final int randomPick = rnd.nextInt(max);
		final Iterator<Texture> iter = textures.values().iterator();
		for (int i = 0; i < randomPick; ++i)
		{
			iter.next();
		}
		return iter.next();
	}

	public String getName()
	{
		return name;
	}

	void loadTexture(final String id, final String resourceName)
	throws IOException
	{
		final InputStream is = getClass().getResourceAsStream(resourceName );
		if ( is != null)
		{
			try
			{
				final Image img = ImageIO.read( is);
		
				final Texture tex = new TextureLoader(img, null).getTexture();
				textures.put(id, tex);
				images.put( id, img);
			}
			finally 
			{
				is.close();
			}
		}
		else
		{
			throw new FileNotFoundException ( resourceName);
		}
	}
}