/*   波打ち (横) ImageFilter  Ver 0.10   */
/*                                       */
/*                                       */
/*   by Atsushi                 98/4/9   */


package net.antun.lib.awt.image;

import java.awt.Dimension;
import java.awt.image.ColorModel;


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

	private int width,height;

	private int waveLength,amplitude;
	private double phase;

	/*   ---   Constructor   ---   */

	public SideWaveImageFilter(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;
		
		consumer.setDimensions(this.width,this.height);
	}

	protected void filterImage()
	{
		int p[],xx;
	
		p=new int[width];
		for (int y=0;y<=height-1;y++)
		{
			for (int x=0;x<=width-1;x++)
			{
				xx=x-amplitude+(int)(
				   Math.sin(phase+2.0*Math.PI*y/waveLength)*amplitude);
				if (0<=xx && xx<originalSize.width)
				{
					p[x]=original[xx+y*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));
	}

	/*   ---   文字列化   ---   */

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