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/*
Apophysis Plugin
Copyright (C) 2007-2009 Joel Faber
Copyright (C) 2007-2009 Michael Faber
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.
*/
// Must define this structure before we include apoplugin.h
typedef struct
{
double edisc_vvar;
} Variables;
#define _USE_MATH_DEFINES
#define APO_NOVARIABLES
#define APO_VIRTUALVAR
#include "apoplugin.h"
// Set the name of this plugin
APO_PLUGIN("edisc");
// You must call the argument "vp".
int PluginVarPrepare(Variation* vp)
{
VAR(edisc_vvar) = VVAR / 11.57034632;
return TRUE; // Always return TRUE.
}
// You must call the argument "vp".
int PluginVarCalc(Variation* vp)
{
double tmp = FTy * FTy + FTx * FTx + 1.0;
double tmp2 = 2.0 * FTx;
double r1 = sqrt(tmp + tmp2);
double r2 = sqrt(tmp - tmp2);
double xmax = (r1 + r2) * 0.5;
double snv, csv, snhu, cshu;
double expu, expuinv;
fsincos(log(xmax + sqrt(xmax - 1.0)), &snv, &csv);
sinhcosh(-acos(FTx / xmax), &snhu, &cshu);
if (FTy > 0.0)
snv = -snv;
FPx += VAR(edisc_vvar) * cshu * csv;
FPy += VAR(edisc_vvar) * snhu * snv;
return TRUE;
}

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