/****************************************************************************/
/* (C) Copyright 1993 Universidade Estadual de Campinas (UNICAMP)           */
/*                    Campinas, SP, Brazil                                  */
/*                                                                          */
/* This file can be freely distributed, modified, and used for any          */
/*   non-commercial purpose, provided that this copyright and authorship    */
/*   notice be included in any copy or derived version of this file.        */
/*                                                                          */
/* DISCLAIMER: This software is offered ``as is'', without any guarantee    */
/*   as to fitness for any particular purpose.  Neither the copyright       */
/*   holder nor the authors or their employers can be held responsible for  */
/*   any damages that may result from its use.                              */
/****************************************************************************/

/* Plotting the "true" zeros of a 2-argument function. */

#ifndef FLTZEROS2_H
#define FLTZEROS2_H

#include <flt.h>
#include <ia.h>
#include <stdio.h>

void fltzeros2_plot(
    FILE *psfile,
    Float f (Float x, Float y),
    Interval xd,
    Interval yd,
    int m
  );
  /* Plots "true" roots of $f(x,y) = 0$, in $xd \x yd$. */
  /* Assumes $psfile$ is a Postscript file, initialized by $plt0$. 
     The "true" zeros are found by evaluating $f$ at the vertices and
     mid-cell points an $m \x m$ regular grid. */

#endif