/*   アニメーション実験  Ver 0.10   */
/*                                  */
/*                                  */
/*   by Atsushi         2005/8/20   */


package animation.animation;

import java.awt.Dimension;
import java.awt.image.ColorModel;
import net.antun.lib.awt.image.SinglepassImageFilter;


public class WaveImageFilter2 extends SinglepassImageFilter
{
	/*   ---   Field   ---   */

	private int width,height;

	private int waveLength,amplitude;
	private double phase;

	/*   ---   Constructor   ---   */

	public WaveImageFilter2(int waveLength,int amplitude,double phase)
	{
		this.waveLength=waveLength;
		this.amplitude =amplitude;
		this.phase     =phase;
	}

	/*   ---   フィルタリング   ---   */

	public void setDimensions(int width,int height)
	{
		super.setDimensions(width,height);
		
		this.width =width +amplitude*2;
		this.height=height+amplitude*2;
		
		consumer.setDimensions(this.width,this.height);
	}

	protected void filterImage()
	{
		double r,d;
		int xx,yy,cx,cy;
		int p[];
	
		p=new int[width];
		cx=width /2;
		cy=height/2;
		for (int y=0;y<=height-1;y++)
		{
			for (int x=0;x<=width-1;x++)
			{
				r=Math.sqrt((x-cx)*(x-cx)+(y-cy)*(y-cy));
				d=Math.sin(phase+2.0*Math.PI*r/waveLength)*amplitude;
				xx=(int)((x-cx)*(r+d)/r)+originalSize.width /2;
				yy=(int)((y-cy)*(r+d)/r)+originalSize.height/2;
				if (0<=xx && xx<originalSize.width &&
				    0<=yy && yy<originalSize.height)
				{
					p[x]=original[xx+yy*originalSize.width];
				}
				else
				{
					p[x]=0;
				}
			}
			consumer.setPixels(0,y,width,1,defaultRGB,p,0,width);
		}
	}

	public void setHints(int hint)
	{
		consumer.setHints(TOPDOWNLEFTRIGHT | COMPLETESCANLINES |
		                  SINGLEPASS | (hint & SINGLEFRAME));
	}

	/*   ---   パラメーター   ---   */

	public void setParameter(int waveLength,int amplitude,double phase)
	{
		this.waveLength=waveLength;
		this.amplitude =amplitude;
		this.phase     =phase;
	}

	/*   ---   文字列化   ---   */

	public String toString()
	{
		return getClass().getName()+"[waveLength="+waveLength+
		                            ",amplitude="+amplitude+
		                            ",phase="+phase+"]";
	}
}