--- a
+++ b/trunk/Plugin/bcircle.c
@@ -0,0 +1,65 @@
+/*
+    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;
+}