64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
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/*
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Apophysis Plugin
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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// Must define this structure before we include apoplugin.h
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typedef struct
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{
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int juliaq_power, juliaq_divisor;
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double half_inv_power;
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double inv_power, inv_power_2pi;
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} Variables;
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#define _USE_MATH_DEFINES
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#include "apoplugin.h"
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// Set the name of this plugin
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APO_PLUGIN("juliaq");
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// Define the Variables
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APO_VARIABLES(
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VAR_INTEGER_NONZERO(juliaq_power, 3),
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VAR_INTEGER_NONZERO(juliaq_divisor, 2),
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);
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// You must call the argument "vp".
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int PluginVarPrepare(Variation* vp)
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{
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VAR(half_inv_power) = 0.5 * VAR(juliaq_divisor) / (double)VAR(juliaq_power);
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VAR(inv_power) = VAR(juliaq_divisor) / (double)VAR(juliaq_power);
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VAR(inv_power_2pi) = M_2PI / (double)VAR(juliaq_power);
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return TRUE; // Always return TRUE.
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}
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// You must call the argument "vp".
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int PluginVarCalc(Variation* vp)
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{
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double sina, cosa;
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fsincos( atan2(FTy, FTx)*VAR(inv_power) + rand()*VAR(inv_power_2pi),
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&sina, &cosa);
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double r = VVAR * pow(sqr(FTx) + sqr(FTy), VAR(half_inv_power));
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FPx += r * cosa;
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FPy += r * sina;
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return TRUE;
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}
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