public Mandelbrot(int rows, int cols, Complex topLeftCorner, double xStepSize, double yStepSize, int maxIterations, RGBColor[] palette){
        Complex[][] plane = new Complex[rows][cols];

    for (int i=0;i<rows;i++){
        for (int j=0;j<cols;j++){
            Complex deltaFromTopLeft = new Complex(j*xStepSize,-i*yStepSize);
            plane[i][j]= topLeftCorner.plus(deltaFromTopLeft);
            }
        }
        complex = plane;
                // this is a shallow copy, do a deep copy
        this.palette = palette;
        this.rows = rows;
        this.cols = cols;
        this.maxIterations=maxIterations;
    }

    public RGBImage getImage(){
        image = new RGBImage(rows, cols);
        for (int i=0;i<rows;i++){
            for (int j=0;j<cols;j++){
            int paletteIndex = complex[i][j].escapeTime(RADIUS, maxIterations);
                if (paletteIndex==-1){
                    paletteIndex=0;
                }
                image.setPixel(i, j, palette[paletteIndex]);
            }
        }

        return image;
    }
}