94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
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/*
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Apophysis Plugin
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Copyright (C) 2007-2009 Joel Faber
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Copyright (C) 2007-2009 Michael Faber
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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 circlize_hole;
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double VVAR4_PI;
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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("circlize");
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// Define the Variables
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APO_VARIABLES(
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VAR_REAL(circlize_hole, 0.0)
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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(VVAR4_PI) = VVAR / M_PI_4;
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// Always return TRUE.
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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 absx = fabs(FTx);
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double absy = fabs(FTy);
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double side;
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double perimeter;
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double r, sina, cosa;
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if (absx >= absy)
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{
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if (FTx >= absy)
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{
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perimeter = absx + FTy;
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}
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else
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{
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perimeter = 5.0 * absx - FTy;
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}
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side = absx;
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}
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else
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{
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if (FTy >= absx)
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{
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perimeter = 3.0 * absy - FTx;
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}
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else
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{
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perimeter = 7.0 * absy + FTx;
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}
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side = absy;
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}
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// tsk tsk... hole is not scaled by vvar.
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r = VAR(VVAR4_PI) * side + VAR(circlize_hole);
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fsincos(M_PI_4 * perimeter / side - M_PI_4, &sina, &cosa);
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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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