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diff --git a/CarpetExtra/IDScalarWaveExpl/README b/CarpetExtra/IDScalarWaveExpl/README
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+CVS info   : $Header: /home/eschnett/C/carpet/Carpet/CarpetExtra/IDScalarWaveExpl/README,v 1.1 2003/06/18 18:24:29 schnetter Exp $
+
+Cactus Code Thorn IDScalarWaveExpl
+Thorn Author(s)     : Erik Schnetter <schnetter@uni-tuebingen.de>
+Thorn Maintainer(s) : Erik Schnetter <schnetter@uni-tuebingen.de>
+--------------------------------------------------------------------------
+
+Purpose of the thorn:
+
+Create initial data for WaveToyExpl.
diff --git a/CarpetExtra/IDScalarWaveExpl/doc/documentation.tex b/CarpetExtra/IDScalarWaveExpl/doc/documentation.tex
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+% *======================================================================*
+%  Cactus Thorn template for ThornGuide documentation
+%  Author: Ian Kelley
+%  Date: Sun Jun 02, 2002
+%  $Header: /home/eschnett/C/carpet/Carpet/CarpetExtra/IDScalarWaveExpl/doc/documentation.tex,v 1.1 2003/06/18 18:24:29 schnetter Exp $                                                             
+%
+%  Thorn documentation in the latex file doc/documentation.tex 
+%  will be included in ThornGuides built with the Cactus make system.
+%  The scripts employed by the make system automatically include 
+%  pages about variables, parameters and scheduling parsed from the 
+%  relevent thorn CCL files.
+%  
+%  This template contains guidelines which help to assure that your     
+%  documentation will be correctly added to ThornGuides. More 
+%  information is available in the Cactus UsersGuide.
+%                                                    
+%  Guidelines:
+%   - Do not change anything before the line
+%       % START CACTUS THORNGUIDE",
+%     except for filling in the title, author, date etc. fields.
+%        - Each of these fields should only be on ONE line.
+%        - Author names should be sparated with a \\ or a comma
+%   - You can define your own macros, but they must appear after
+%     the START CACTUS THORNGUIDE line, and must not redefine standard 
+%     latex commands.
+%   - To avoid name clashes with other thorns, 'labels', 'citations', 
+%     'references', and 'image' names should conform to the following 
+%     convention:          
+%       ARRANGEMENT_THORN_LABEL
+%     For example, an image wave.eps in the arrangement CactusWave and 
+%     thorn WaveToyC should be renamed to CactusWave_WaveToyC_wave.eps
+%   - Graphics should only be included using the graphix package. 
+%     More specifically, with the "includegraphics" command. Do
+%     not specify any graphic file extensions in your .tex file. This 
+%     will allow us (later) to create a PDF version of the ThornGuide
+%     via pdflatex. |
+%   - References should be included with the latex "bibitem" command. 
+%   - Use \begin{abstract}...\end{abstract} instead of \abstract{...}
+%   - Do not use \appendix, instead include any appendices you need as 
+%     standard sections. 
+%   - For the benefit of our Perl scripts, and for future extensions, 
+%     please use simple latex.     
+%
+% *======================================================================* 
+% 
+% Example of including a graphic image:
+%    \begin{figure}[ht]
+% 	\begin{center}
+%    	   \includegraphics[width=6cm]{MyArrangement_MyThorn_MyFigure}
+% 	\end{center}
+% 	\caption{Illustration of this and that}
+% 	\label{MyArrangement_MyThorn_MyLabel}
+%    \end{figure}
+%
+% Example of using a label:
+%   \label{MyArrangement_MyThorn_MyLabel}
+%
+% Example of a citation:
+%    \cite{MyArrangement_MyThorn_Author99}
+%
+% Example of including a reference
+%   \bibitem{MyArrangement_MyThorn_Author99}
+%   {J. Author, {\em The Title of the Book, Journal, or periodical}, 1 (1999), 
+%   1--16. {\tt http://www.nowhere.com/}}
+%
+% *======================================================================* 
+
+% If you are using CVS use this line to give version information
+% $Header: /home/eschnett/C/carpet/Carpet/CarpetExtra/IDScalarWaveExpl/doc/documentation.tex,v 1.1 2003/06/18 18:24:29 schnetter Exp $
+
+\documentclass{article}
+
+% Use the Cactus ThornGuide style file
+% (Automatically used from Cactus distribution, if you have a 
+%  thorn without the Cactus Flesh download this from the Cactus
+%  homepage at www.cactuscode.org)
+\usepackage{../../../../doc/latex/cactus}
+
+\begin{document}
+
+% The author of the documentation
+\author{Erik Schnetter \textless schnetter@uni-tuebingen.de\textgreater}
+
+% The title of the document (not necessarily the name of the Thorn)
+\title{}
+
+% the date your document was last changed, if your document is in CVS, 
+% please use:
+%    \date{$ $Date: 2003/06/18 18:24:29 $ $}
+\date{June 18 2003}
+
+\maketitle
+
+% Do not delete next line
+% START CACTUS THORNGUIDE
+
+% Add all definitions used in this documentation here 
+%   \def\mydef etc
+
+% Add an abstract for this thorn's documentation
+\begin{abstract}
+
+\end{abstract}
+
+% The following sections are suggestive only.
+% Remove them or add your own.
+
+\section{Introduction}
+
+\section{Physical System}
+
+\section{Numerical Implementation}
+
+\section{Using This Thorn}
+
+\subsection{Obtaining This Thorn}
+
+\subsection{Basic Usage}
+
+\subsection{Special Behaviour}
+
+\subsection{Interaction With Other Thorns}
+
+\subsection{Examples}
+
+\subsection{Support and Feedback}
+
+\section{History}
+
+\subsection{Thorn Source Code}
+
+\subsection{Thorn Documentation}
+
+\subsection{Acknowledgements}
+
+
+\begin{thebibliography}{9}
+
+\end{thebibliography}
+
+% Do not delete next line
+% END CACTUS THORNGUIDE
+
+\end{document}
diff --git a/CarpetExtra/IDScalarWaveExpl/interface.ccl b/CarpetExtra/IDScalarWaveExpl/interface.ccl
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+# Interface definition for thorn IDScalarWaveExpl
+# $Header: /home/eschnett/C/carpet/Carpet/CarpetExtra/IDScalarWaveExpl/interface.ccl,v 1.1 2003/06/18 18:24:29 schnetter Exp $
+
+IMPLEMENTS: IDScalarWaveExpl
+
+INHERITS: Grid WaveToyExpl
diff --git a/CarpetExtra/IDScalarWaveExpl/param.ccl b/CarpetExtra/IDScalarWaveExpl/param.ccl
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+# Parameter definitions for thorn IDScalarWaveExpl
+# $Header: /home/eschnett/C/carpet/Carpet/CarpetExtra/IDScalarWaveExpl/param.ccl,v 1.1 2003/06/18 18:24:29 schnetter Exp $
+
+CCTK_REAL wave_number[3] "Wave number"
+{
+  *:* :: ""
+} 0.0
+
+CCTK_REAL phase_offset[3] "Phase offset"
+{
+  *:* :: ""
+} 0.0
+
+CCTK_REAL time_offset "Time offset"
+{
+  *:* :: ""
+} 0.0
+
+CCTK_REAL amplitude "Wave amplitude"
+{
+  *:* :: ""
+} 1.0
diff --git a/CarpetExtra/IDScalarWaveExpl/schedule.ccl b/CarpetExtra/IDScalarWaveExpl/schedule.ccl
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+# Schedule definitions for thorn IDScalarWaveExpl
+# $Header: /home/eschnett/C/carpet/Carpet/CarpetExtra/IDScalarWaveExpl/schedule.ccl,v 1.2 2003/11/05 16:18:40 schnetter Exp $
+
+SCHEDULE IDScalarWaveExpl_InitialData AT initial
+{
+  LANG: Fortran
+  STORAGE: WaveToyExpl::scalarevolve[1]
+} "Initial data for the scalar field"
diff --git a/CarpetExtra/IDScalarWaveExpl/src/initialdata.F77 b/CarpetExtra/IDScalarWaveExpl/src/initialdata.F77
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+c     $Header: /home/eschnett/C/carpet/Carpet/CarpetExtra/IDScalarWaveExpl/src/initialdata.F77,v 1.2 2003/11/05 16:18:40 schnetter Exp $
+
+#include "cctk.h"
+#include "cctk_Arguments.h"
+#include "cctk_Functions.h"
+#include "cctk_Parameters.h"
+      
+      subroutine IDScalarWaveExpl_InitialData (CCTK_ARGUMENTS)
+      implicit none
+      DECLARE_CCTK_ARGUMENTS
+      DECLARE_CCTK_FUNCTIONS
+      DECLARE_CCTK_PARAMETERS
+      CCTK_REAL pi
+      parameter (pi = 3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117068d0)
+      CCTK_REAL omega
+      integer i, j, k
+      omega = sqrt(wave_number(1)**2 + wave_number(2)**2 + wave_number(3)**2)
+      do k=1,cctk_lsh(3)
+         do j=1,cctk_lsh(2)
+            do i=1,cctk_lsh(1)
+               phi(i,j,k) = amplitude * cos (2*pi *
+     $              ( wave_number(1)*(x(i,j,k)-phase_offset(1))
+     $              + wave_number(2)*(y(i,j,k)-phase_offset(2))
+     $              + wave_number(3)*(z(i,j,k)-phase_offset(3))
+     $              + omega*(cctk_time-time_offset)))
+               psi(i,j,k) = - amplitude * 2*pi * omega * sin (2*pi *
+     $              ( wave_number(1)*(x(i,j,k)-phase_offset(1))
+     $              + wave_number(2)*(y(i,j,k)-phase_offset(2))
+     $              + wave_number(3)*(z(i,j,k)-phase_offset(3))
+     $              + omega*(cctk_time-time_offset)))
+            end do
+         end do
+      end do
+      end
diff --git a/CarpetExtra/IDScalarWaveExpl/src/make.code.defn b/CarpetExtra/IDScalarWaveExpl/src/make.code.defn
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+# Main make.code.defn file for thorn IDScalarWaveExpl
+# $Header: /home/eschnett/C/carpet/Carpet/CarpetExtra/IDScalarWaveExpl/src/make.code.defn,v 1.1 2003/06/18 18:24:29 schnetter Exp $
+
+# Source files in this directory
+SRCS = initialdata.F77
+
+# Subdirectories containing source files
+SUBDIRS = 
+