NAME

     create_squarewave - creates a square wave image

SYNOPSIS

      #include "CVIPtoolkit.h"
      #include "waves.h"

     Image *create_squarewave(int img_size,  int  frequency,  int
     choice)

      <img_size> - number of rows (and columns) in new image
      <frequency> - sine wave frequency
      <choice> - enter 1 for horizontal, 2  for  vertical  square
     wave

PATH

     $CVIPHOME/GEOMETRY/square.c

DESCRIPTION

     This function creates a horizontal or vertical  square  wave
     image of size img_sizeXimg_size, of frequency 1 to 256.

TYPES AND CONSTANTS


RETURN VALUES

     A pointer to the new image

HISTORY

     History information recorded: None

EXAMPLE

      #include <CVIPtoolkit.h>
      #include <CVIPimage.h>
      #include <CVIPdef.h>
      #include <CVIPdrawimg.h>
      #include <CVIPconvert.h>
      #include <CVIPview.h>
      #define VIEWER "picture"
      #define VIDEO_APP "SunVideo &"

      void main()
      {
      Image *cvipImage;
      IMAGE_FORMAT format;
      char *outputfile;

      setDisplay_Image(VIEWER, "Default");

      /* the following call creates a image of  size  100  x  100
     with  freq uency 32 and the square wave is in the horizontal
     direction */

      cvipImage = create_squarewave(100,32,1);
      print_CVIP("\n\t\tEnter the Output File Name:  ");
      outputfile = getString_CVIP();
      view_Image(cvipImage,outputfile);
      getFileFormat_Image(cvipImage);
      write_Image(cvipImage,outputfile,CVIP_NO,CVIP_NO,format,1);
      free(outputfile);
      }

SEE ALSO

     libgeometry

AUTHOR

     Copyright (C) 1996 SIUE -  by  Scott  E.  Umbaugh,  Srinivas
     Madiraju, and Kun Luo .