public class Surface{
    double[] origCoeff;
    double[] coefficients;
    Matrix3D tf;

    material m;
    final int INFTY=10500;
    final static Vector e0=new Vector(new double[]{0,0,1});
    void setMaterial(material ms){
	m=new material();
	m.copy(ms);
    }

    void setTransfo(Matrix3D tfs){
	tf=new Matrix3D();
	tf.copy(tfs);    
	tf.invert();
	tf.transpose();
	tf.transform(origCoeff, coefficients);
    }

    void cube(material ms){
    }
    double[] intersections(double[] v, double[] w){
	//yields t where the ray enters and leaves the surface,
	// adding 0 (or -infty?) or +infty if necessary
	return new double[]{0}; 
   }

    Vector getNormal(double[] position){
	return new Vector(new double[]{0});
    }

    double[] shade(light[] lights, double[]v, double[]w, double t, int howManyRefl, hw9 call, double refrInd){
	return new double[] {0};    
    }

    public double[] shade(Surface[] obj, Light[] lights, double[] v, double[] ws, double t, int howManyRefl, hw9 calling){
	return new double[] {0};    
    }

    void setCenter(double[] c){
    }

}