58 lines
1.5 KiB
C
58 lines
1.5 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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double v;
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} Variables;
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#define _USE_MATH_DEFINES
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#define APO_NOVARIABLES
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#define APO_VIRTUALVAR
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#include "apoplugin.h"
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// Set the name of this plugin
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APO_PLUGIN("deltaA");
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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(v) = 0.5 * VVAR / M_PI;
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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 avgr, avga;
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double s, c;
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avgr = VVAR * (sqrt(sqr(FTy) + sqr(FTx + 1.0)) / sqrt(sqr(FTy) + sqr(FTx - 1.0)));
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avga = (atan2( FTy, FTx - 1.0) - atan2(FTy, FTx + 1.0) )/ 2.0;
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fsincos( avga, &s, &c);
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FPx += avgr * c;
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FPy += avgr * s;
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return TRUE;
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}
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