95a2f54683
git-svn-id: https://svn.code.sf.net/p/apophysis7x/svn/trunk@1 a5d1c0f9-a0e9-45c6-87dd-9d276e40c949
67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/*
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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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typedef struct
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{
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double cosa, sina, rat;
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double xheart_angle;
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double xheart_ratio;
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} Variables;
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#define _USE_MATH_DEFINES
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#include "apoplugin.h"
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APO_PLUGIN("xheart");
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APO_VARIABLES(
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VAR_REAL(xheart_angle, 0.0),
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VAR_REAL(xheart_ratio, 0.0)
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);
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int PluginVarPrepare(Variation* vp)
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{
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double c, s; double ang = M_PI_4 + (0.5 * M_PI_4 * VAR(xheart_angle));
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fsincos(ang, &s, &c); VAR(cosa) = c; VAR(sina) = s;
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double r = 6 + 2 * VAR(xheart_ratio);
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VAR(rat) = r;
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return TRUE;
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}
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inline double lerp(double a, double b, double x) { x=(x<0)?0:x; x=(x>1)?1:x;return x+(b-a)*x; }
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int PluginVarCalc(Variation* vp)
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{
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double r2_4 = sqr(FTx) + sqr(FTy) + 4;
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if (r2_4 == 0) r2_4 = 1;
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double bx = 4 / r2_4, by = VAR(rat) / r2_4;
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double x = VAR(cosa) * (bx*FTx) - VAR(sina) * (by*FTy);
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double y = VAR(sina) * (bx*FTx) + VAR(cosa) * (by*FTy);
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if (x > 0) {
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FPx += VVAR * x;
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FPy += VVAR * y;
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} else {
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FPx += VVAR * x;
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FPy += -VVAR * y;
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}
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return TRUE;
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}
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