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/*
Apophysis Plugin
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.
*/
typedef struct
{
double bcbw;
double bcircle_scale;
double bcircle_borderwidth;
} Variables;
#include "apoplugin.h"
APO_PLUGIN("bcircle");
APO_VARIABLES(
VAR_REAL(bcircle_scale, 1.0),
VAR_REAL(bcircle_borderwidth, 0.0)
);
int PluginVarPrepare(Variation* vp)
{
VAR(bcbw) = fabs(VAR(bcircle_borderwidth));
return TRUE;
}
int PluginVarCalc(Variation* vp)
{
if ((FTx == 0) && (FTy == 0)) {
return TRUE;
}
double x = FTx * VAR(bcircle_scale);
double y = FTy * VAR(bcircle_scale);
double r = sqrt(x * x + y * y);
if (r <= 1) {
FPx += VVAR * x;
FPy += VVAR * y;
} else {
if (VAR(bcbw) != 0) {
double ang = atan2(y, x);
double omega = (0.2 * VAR(bcbw) * random01()) + 1;
double px = omega * cos(ang);
double py = omega * sin(ang);
FPx += VVAR * px;
FPy += VVAR * py;
}
}
return TRUE;
}