curvature.C

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/* Gnome gxsm - Gnome X Scanning Microscopy
 * universal STM/AFM/SARLS/SPALEED/... controlling and
 * data analysis software
 *
 * plugin_helper reports your answers as
author          =Percy Zahl
email                   =zahl@users.sf.net
pluginname              =curvature
pluginmenuentry         =Curvature
menupath                =Math/Filter 2D/
entryplace              =Filter 2D
shortentryplace =F2D
abouttext               =computes curvature
smallhelp               =compute curvature
longhelp                =computes curvature via convolution
 * 
 * Gxsm Plugin Name: curvature.C
 * ========================================
 * 
 * Copyright (C) 1999 The Free Software Foundation
 *
 * Authors: Percy Zahl <zahl@fkp.uni-hannover.de>
 * additional features: Andreas Klust <klust@fkp.uni-hannover.de>
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 */


/* Please do not change the Begin/End lines of this comment section!
 * this is a LaTeX style section used for auto generation of the PlugIn Manual 
 * Chapter. Add a complete PlugIn documentation inbetween the Begin/End marks!
 * All "% PlugInXXX" commentary tags are mandatory
 * All "% OptPlugInXXX" tags are optional and can be removed or commented in
 * --------------------------------------------------------------------------------
% BeginPlugInDocuSection
% PlugInDocuCaption: Curvature
% PlugInName: curvature
% PlugInAuthor: Percy Zahl
% PlugInAuthorEmail: zahl@users.sf.net
% PlugInMenuPath: Math/Filter 2D/Curvature

% PlugInDescription
Curvature calculation.

% PlugInUsage
Call \GxsmMenu{Math/Filter 2D/Curvature}.

% OptPlugInSources
The active channel is used as data source.

% OptPlugInDest
The computation result is placed into an existing math channel, else
into a new created math channel.

% EndPlugInDocuSection
 * -------------------------------------------------------------------------------- 
 */

#include <gtk/gtk.h>
#include "config.h"
#include "gxsm/plugin.h"

// Plugin Prototypes
static void curvature_init( void );
static void curvature_about( void );
static void curvature_configure( void );
static void curvature_cleanup( void );

// Define Type of math plugin here, only one line should be commented in!!
#define GXSM_ONE_SRC_PLUGIN__DEF
// #define GXSM_TWO_SRC_PLUGIN__DEF

// Math-Run-Function, use only one of (automatically done :=)
#ifdef GXSM_ONE_SRC_PLUGIN__DEF
// "OneSrc" Prototype
 static gboolean curvature_run( Scan *Src, Scan *Dest );
#else
// "TwoSrc" Prototype
 static gboolean curvature_run( Scan *Src1, Scan *Src2, Scan *Dest );
#endif

// Fill in the GxsmPlugin Description here
GxsmPlugin curvature_pi = {
  NULL,                   // filled in and used by Gxsm, don't touch !
  NULL,                   // filled in and used by Gxsm, don't touch !
  0,                      // filled in and used by Gxsm, don't touch !
  NULL,                   // The Gxsm-App Class Ref.pointer (called "gapp" in Gxsm) is 
                          // filled in here by Gxsm on Plugin load, 
                          // just after init() is called !!!
  // ----------------------------------------------------------------------
  // Plugins Name, CodeStly is like: Name-M1S|M2S-BG|F1D|F2D|ST|TR|Misc
  "curvature-"
#ifdef GXSM_ONE_SRC_PLUGIN__DEF
  "M1S"
#else
  "M2S"
#endif
  "-F2D",
  // Plugin's Category - used to autodecide on Pluginloading or ignoring
  // NULL: load, else
  // example: "+noHARD +STM +AFM"
  // load only, if "+noHARD: no hardware" and Instrument is STM or AFM
  // +/-xxxHARD und (+/-INST or ...)
  NULL,
  // Description, is shown by PluginViewer (Plugin: listplugin, Tools->Plugin Details)
  "Computes local curvature via convolution.",                   
  // Author(s)
  "Percy Zahl",
  // Menupath to position where it is appendet to
  N_("_Math/Filter _2D/"),
  // Menuentry
  N_("Curvature"),
  // help text shown on menu
  N_("compute local curvature"),
  // more info...
  "Computes local curvature using 2D convolution.",
  NULL,          // error msg, plugin may put error status msg here later
  NULL,          // Plugin Status, managed by Gxsm, plugin may manipulate it too
  // init-function pointer, can be "NULL", 
  // called if present at plugin load
  curvature_init,  
  // query-function pointer, can be "NULL", 
  // called if present after plugin init to let plugin manage it install itself
  NULL, // query should be "NULL" for Gxsm-Math-Plugin !!!
  // about-function, can be "NULL"
  // can be called by "Plugin Details"
  curvature_about,
  // configure-function, can be "NULL"
  // can be called by "Plugin Details"
  curvature_configure,
  // run-function, can be "NULL", if non-Zero and no query defined, 
  // it is called on menupath->"plugin"
  NULL, // run should be "NULL" for Gxsm-Math-Plugin !!!
  // cleanup-function, can be "NULL"
  // called if present at plugin removeal
  curvature_cleanup
};

// special math Plugin-Strucure, use
// GxsmMathOneSrcPlugin curvature_m1s_pi -> "OneSrcMath"
// GxsmMathTwoSrcPlugin curvature_m2s_pi -> "TwoSrcMath"
#ifdef GXSM_ONE_SRC_PLUGIN__DEF
 GxsmMathOneSrcPlugin curvature_m1s_pi
#else
 GxsmMathTwoSrcPlugin curvature_m2s_pi
#endif
 = {
   // math-function to run, see prototype(s) above!!
   curvature_run
 };

// Text used in Aboutbox, please update!!
static const char *about_text = N_("Gxsm curvature Plugin\n\n"
                                   "Computes the local curvature using convolution.");

// Symbol "get_gxsm_plugin_info" is resolved by dlsym from Gxsm, used to get Plugin's info!! 
// Essential Plugin Function!!
GxsmPlugin *get_gxsm_plugin_info ( void ){ 
  curvature_pi.description = g_strdup_printf(N_("Gxsm MathOneArg curvature plugin %s"), VERSION);
  return &curvature_pi; 
}

// Symbol "get_gxsm_math_one|two_src_plugin_info" is resolved by dlsym from Gxsm, 
// used to find out which Math Type the Plugin is!! 
// Essential Plugin Function!!
#ifdef GXSM_ONE_SRC_PLUGIN__DEF
GxsmMathOneSrcPlugin *get_gxsm_math_one_src_plugin_info( void ) {
  return &curvature_m1s_pi; 
}
#else
GxsmMathTwoSrcPlugin *get_gxsm_math_two_src_plugin_info( void ) { 
  return &curvature_m2s_pi; 
}
#endif

/* Here we go... */
// init-Function
static void curvature_init(void)
{
  PI_DEBUG (DBG_L2, "curvature Plugin Init");
}

// about-Function
static void curvature_about(void)
{
  const gchar *authors[] = { curvature_pi.authors, NULL};
  gtk_widget_show(gnome_about_new ( curvature_pi.name,
                                    VERSION,
                                    N_("(C) 2000 the Free Software Foundation"),
                                    about_text,
                                    authors,
                                    NULL, NULL, NULL
                                    ));
}

// configure-Function
static void curvature_configure(void)
{
        if(curvature_pi.app)
                curvature_pi.app->message("curvature Plugin Configuration");
}

// cleanup-Function
static void curvature_cleanup(void)
{
        PI_DEBUG (DBG_L2, "curvature Plugin Cleanup");
}

/*
 * use curvature (second derivative) as height [lderiv_kernel]
 */

class MemCurvatureKrn : public MemDigiFilter{
public:
        MemCurvatureKrn (double xms, double xns, int m, int n) : MemDigiFilter (xms, xns, m, n){};
        virtual gboolean CalcKernel (){
                int i;
                double c0 = 6.0, c1=4.0;
                double ksump, kasump;
  
                if (xms < 0.5)  xms = 0.5;
                if (xns < 0.5)  xns = 0.5;
                double asum = 5 + 8*xns*xms;
                do{
                        kasump = ksump = 0.;
                        for (i= -m;i<=m;i++)    {
                                int j;
                                double isq = i*i/xms;
                                for (j= -n;j<=n;j++)    {
                                        double i_jsq = j*j/xns+isq;
                                        data->Z (ksump += (c0-c1*i_jsq)*exp(-i_jsq), j+n,i+m);
                                        kasump += fabs (data->Z(j+n,i+m));
                                }
                        }
                        if (kasump < asum)
                                c0 /= 0.9 + 0.1*kasump/asum;
                        if (ksump > 0)
                                c1 += 0.3*c1*ksump/(double)kasump;
                        else if (ksump < 0)     {
                                c1 += 0.1*c1*ksump/(double)kasump;
                                c0 -= 0.1*c0*ksump/(double)kasump;
                        }
                }while (fabs (ksump) > 0.3); // != 0
                data->Zadd (-ksump, n,m);
                return 0;
        };
};

// run-Function
static gboolean curvature_run(Scan *Src, Scan *Dest)
{
        double r = 5.;    // Get Radius
        gapp->ValueRequest("2D Convol. Filter Size", "Radius", "Curvature kernel size: s = 1+radius",
                           gapp->xsm->Unity, 0., Src->mem2d->GetNx()/10., ".0f", &r);
        int    s = 1+(int)(r + .9);
        MemCurvatureKrn krn (r,r, s,s);
        krn.Convolve (Src->mem2d, Dest->mem2d);
        return MATH_OK;
}

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