visl.c

The Free Finite Element Package is a library which contains numerical methods required when working

/*--------------------------------------------------------------------------

Free Finite Element Package                             
Copyright (c) 2002-2006 by Joerg Frochte
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
----------------------------------------------------------------------------*/

# include "visl.h"

/** 
 * \file 
 * \brief Exports data for visualisation e.g. with gnuplot or freepdeplot 
 * \author Joerg Frochte 
*/

void visl_write_gnuplotdata (char *filename, MESH * mesh, VECTOR * u)
{
    VECTOR *x;
    VECTOR *y;
    int i=0;

    x = meml_vector_new(mesh->number_of_points);
    y = meml_vector_new(mesh->number_of_points);

    for (i=0;i<mesh->number_of_points;i++)
    {
	x->data[i] = mesh->points->data[2*i];
	y->data[i] = mesh->points->data[2*i+1];
    }

    meml_vector_export2dat (filename,3,x,y,u);

    meml_vector_free(x);
    meml_vector_free(y);
}



int visl_write_plotdata (char *filename, const LEGEND legende,
			 MESH * mesh, VECTOR * u1, VECTOR * u2)
{
  FILE *tempdata;
  char typ = 's';
  int j, tempint;
  float tempfloat;

  if (u2 != NULL)
    {
      if (u1->dim != u2->dim)
	{
	  fprintf (stderr, "visl_write_plotdata: "
		   "The vectors must be of the same size.\n\n");
	  return (EXIT_FAILURE);
	}

      typ = 'f';
    }
  tempdata = fopen (filename, "wb");

  /* globale daten */
  fwrite (&typ, sizeof (char), 1, tempdata);
  fwrite (&legende, sizeof (LEGEND), 1, tempdata);


  /* die daten pro frame */

  tempint = mesh->number_of_triangles;
  fwrite (&tempint, sizeof (int), 1, tempdata);

  fwrite (mesh->triangles->data, sizeof (int),
	  mesh->number_of_triangles * 3, tempdata);

  tempint = mesh->points->dim / 2;
  fwrite (&tempint, sizeof (int), 1, tempdata);

  for (j = 0; j < mesh->points->dim; j++)
  {
      tempfloat = mesh->points->data[j];
      fwrite (&tempfloat, sizeof (float), 1, tempdata);
  }

  for (j = 0; j < mesh->number_of_points; j++)
  {
      tempfloat = u1->data[j];
      fwrite (&tempfloat, sizeof (float), 1, tempdata);
  }

  if (u2 != NULL)
  {
      for (j = 0; j < mesh->number_of_points ; j++)
      {
	  tempfloat = u2->data[j];
	  fwrite (&tempfloat, sizeof (float), 1, tempdata);
      }
  }

  fclose (tempdata);

  return (EXIT_SUCCESS);
}


char visl_load_plotdata (char *filename, LEGEND * legende,
			 VECTOR ** points, INDEXARRAY ** triangles, 
			 VECTOR ** u1, VECTOR ** u2)
{
  FILE *tempdata;
  char typ = 's';
  int j;
  float tempfloat;
  int number_of_triangles;
  int number_of_points;

  tempdata = fopen (filename, "r");

  /* globale daten */
  fread (&typ, sizeof (char), 1, tempdata);
  fread (legende, sizeof (LEGEND), 1, tempdata);

  /* die daten pro frame */

  fread (&(number_of_triangles), sizeof (int), 1, tempdata);

  (*triangles) = meml_indexarray_new(number_of_triangles*3);

  fread ( (*triangles)->data, sizeof (int),
	 number_of_triangles * 3, tempdata);

  fread (&(number_of_points), sizeof (int), 1, tempdata);
  (*points) = meml_vector_new(number_of_points*2);

  for (j = 0; j < 2*number_of_points; j++)
  {
      fread (&tempfloat, sizeof (float), 1, tempdata);
      (*points)->data[j] = tempfloat;
  }

  (*u1) = meml_vector_new(number_of_points);
  for (j = 0; j < number_of_points; j++)
  {
      fread (&tempfloat, sizeof (float), 1, tempdata);
      (*u1)->data[j] = tempfloat;
  }

  if (typ == 'f')
  {
      (*u2) = meml_vector_new(number_of_points);
      for (j = 0; j < number_of_points; j++)
      {
	  fread (&tempfloat, sizeof (float), 1, tempdata);
	  (*u2)->data[j] = tempfloat;
      }
  }

  fclose (tempdata);

  return (typ);
}