--- a
+++ b/tags/16/Variations/varBlurZoom.pas
@@ -0,0 +1,144 @@
+{
+     Apophysis Copyright (C) 2001-2004 Mark Townsend
+     Apophysis Copyright (C) 2005-2006 Ronald Hordijk, Piotr Borys, Peter Sdobnov
+     Apophysis Copyright (C) 2007-2008 Piotr Borys, Peter Sdobnov
+     
+     Apophysis "3D hack" Copyright (C) 2007-2008 Peter Sdobnov
+     Apophysis "7X" Copyright (C) 2009-2010 Georg Kiehne
+
+     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.
+}
+
+unit varBlurZoom;
+
+interface
+
+uses
+  BaseVariation, XFormMan;
+
+type
+  TVariationBlurZoom = class(TBaseVariation)
+  private
+    blur_zoom_length, blur_zoom_x, blur_zoom_y: double; 
+  public
+    constructor Create;
+
+    class function GetName: string; override;
+    class function GetInstance: TBaseVariation; override;
+
+    function GetNrVariables: integer; override;
+    function GetVariableNameAt(const Index: integer): string; override;
+
+    function SetVariable(const Name: string; var value: double): boolean; override;
+    function GetVariable(const Name: string; var value: double): boolean; override;
+
+	  procedure Prepare; override;
+    procedure CalcFunction; override;
+  end;
+
+implementation
+
+uses
+  Math;
+
+///////////////////////////////////////////////////////////////////////////////
+procedure TVariationBlurZoom.Prepare;
+begin
+end;
+
+procedure TVariationBlurZoom.CalcFunction;
+var z: double;
+begin
+
+  z := 1.0 + blur_zoom_length * random;
+  FPx^ := FPx^ + vvar * ((FTx^ - blur_zoom_x) * z + blur_zoom_x);
+  FPy^ := FPy^ + vvar * ((FTy^ - blur_zoom_y) * z - blur_zoom_y);
+  FPz^ := FPz^ + vvar * FTz^;
+end;
+
+///////////////////////////////////////////////////////////////////////////////
+constructor TVariationBlurZoom.Create;
+begin
+  blur_zoom_length := 0;
+  blur_zoom_x := 0;
+  blur_zoom_y := 0;
+end;
+
+///////////////////////////////////////////////////////////////////////////////
+class function TVariationBlurZoom.GetInstance: TBaseVariation;
+begin
+  Result := TVariationBlurZoom.Create;
+end;
+
+///////////////////////////////////////////////////////////////////////////////
+class function TVariationBlurZoom.GetName: string;
+begin
+  Result := 'blur_zoom';
+end;
+
+///////////////////////////////////////////////////////////////////////////////
+function TVariationBlurZoom.GetVariableNameAt(const Index: integer): string;
+begin
+  case Index Of
+  0: Result := 'blur_zoom_length';
+  1: Result := 'blur_zoom_x';
+  2: Result := 'blur_zoom_y';
+  else
+    Result := '';
+  end
+end;
+
+///////////////////////////////////////////////////////////////////////////////
+function TVariationBlurZoom.SetVariable(const Name: string; var value: double): boolean;
+begin
+  Result := False;
+  if Name = 'blur_zoom_length' then begin
+    blur_zoom_length := Value;
+    Result := True;
+  end else if Name = 'blur_zoom_x' then begin
+    blur_zoom_y := Value;
+    Result := True;
+  end else if Name = 'blur_zoom_y' then begin
+    blur_zoom_y := Value;
+    Result := True;
+  end 
+end;
+
+///////////////////////////////////////////////////////////////////////////////
+function TVariationBlurZoom.GetNrVariables: integer;
+begin
+  Result := 3
+end;
+
+///////////////////////////////////////////////////////////////////////////////
+function TVariationBlurZoom.GetVariable(const Name: string; var value: double): boolean;
+begin
+  Result := False;
+  if Name = 'blur_zoom_length' then begin
+    Value := blur_zoom_length;
+    Result := True;
+  end else if Name = 'blur_zoom_x' then begin
+    Value := blur_zoom_x;
+    Result := True;
+  end else if Name = 'blur_zoom_y' then begin
+    Value := blur_zoom_y;
+    Result := True;
+  end
+end;
+
+///////////////////////////////////////////////////////////////////////////////
+initialization
+  RegisterVariation(TVariationClassLoader.Create(TVariationBlurZoom), true, false);
+end.