public class SubtractOp extends PixelOp
{
    public Complex operate(Complex pix, ComplexImage im, PixelDesc desc)
    {
        MotherImageMapping mim = (MotherImageMapping) im.map;
        
        int colour = mim.backMap(param1);
       // System.out.println(param1+" "+colour+" "+mim.highpoint+" "+mim.lowpoint);
        
        float pixmag = pix.getMag();
        if (pixmag!=0)
        {
            work.r = pix.r-colour*pix.r/(pixmag);
            work.i = pix.i-colour*pix.i/(pixmag);
        } else
        {
            work.r = colour;
            work.i = 0;
        }
        work.r = pix.r*(1-desc.amount)+work.r*desc.amount;
        work.i = pix.i*(1-desc.amount)+work.i*desc.amount;
        //System.out.println(param1+" "+desc.amount+" "+pixmag+" "+work.r);
        return(work);     
    }
}