/* 
 *     XaoS, a fast portable realtime fractal zoomer 
 *                  Copyright (C) 1996,1997 by
 *
 *      Jan Hubicka          (hubicka@paru.cas.cz)
 *      Thomas Marsh         (tmarsh@austin.ibm.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#ifdef __EMX__
#include <float.h>
#include <sys/cdefs.h>
#endif
#ifdef _plan9_
#include <u.h>
#include <libc.h>
#ifndef NULL
#define NULL (void *)0
#endif
#else
#include <stdio.h>
#include <aconfig.h>
#include <math.h>
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#include <config.h>
#endif
#include <fconfig.h>
#include <plane.h>
#include <complex.h>
CONST char *CONST planename[] = {
    "mu",
    "1/mu",
    "1/(mu+0.25)",
    "lambda",
    "1/lambda",
    "1/(lambda-1)",
    "1/(mu-1.40115)",
    NULL
};


REGISTERS(3)
void recalculate(int plane, number_t * x1, number_t * y1)
{
    number_t x = *x1, y = *y1;
    switch (plane) {
    case 1:
	{			/* 1/mu */
	    number_t t;
	    if (myabs(x) + myabs(y) < 0.000001)
		t = INT_MAX, y = INT_MAX;
	    else {

		c_div(1, 0, x, y, t, y);
	    }
	    x = t;
	}
	break;
    case 2:
	{			/* 1/(mu + 0.25) */
	    number_t t;
	    if (myabs(x) + myabs(y) < 0.000001)
		t = INT_MAX, y = INT_MAX;
	    else {

		c_div(1, 0, x, y, t, y);
	    }
	    x = t;
	    x += 0.25;
	}
	break;
    case 3:			/* lambda */
	{
	    number_t tr, ti, mr, mi;

	    mr = x, mi = y;
	    c_pow2(x, y, tr, ti);
	    c_div(tr, ti, 4, 0, x, y);
	    c_div(mr, mi, 2, 0, tr, ti);
	    c_sub(tr, ti, x, y, mr, mi);
	    x = mr, y = mi;
	}
	break;
    case 4:			/* 1/lambda */
	{
	    number_t tr, ti, mr, mi;

	    c_div(1, 0, x, y, tr, y);
	    x = tr;
	    mr = x, mi = y;
	    c_pow2(x, y, tr, ti);
	    c_div(tr, ti, 4, 0, x, y);
	    c_div(mr, mi, 2, 0, tr, ti);
	    c_sub(tr, ti, x, y, mr, mi);
	    x = mr, y = mi;
	}
	break;
    case 5:			/* 1/(lambda-1) */
	{
	    number_t tr, ti, mr, mi;

	    c_div(1, 0, x, y, tr, y);
	    x = tr + 1;
	    mr = x, mi = y;
	    c_pow2(x, y, tr, ti);
	    c_div(tr, ti, 4, 0, x, y);
	    c_div(mr, mi, 2, 0, tr, ti);
	    c_sub(tr, ti, x, y, mr, mi);
	    x = mr, y = mi;
	}
	break;
    case 6:
	{			/* 1/(mu + 0.25) */
	    number_t t;
	    if (myabs(x) + myabs(y) < 0.000001)
		t = INT_MAX, y = INT_MAX;
	    else {

		c_div(1, 0, x, y, t, y);
	    }
	    x = t;
	    x -= 1.40115;
	}
	break;
    default:
	break;
    }
    *x1 = x;
    *y1 = y;
}