/*******************************************************************************
*
* McXtrace, x-ray tracing package
*         Copyright, All rights reserved
*         DTU Physics, Kgs. Lyngby, Denmark
*         Synchrotron SOLEIL, Saint-Aubin, France
*
* Component: Monitor
*
* %Identification
* Written by: Erik Knudsen
* Based on neutron component written by Kristian Nielsen and Kim Lefmann
*
* Date: June 22, 2009
* Origin: Risoe
* Release: McXtrace 0.1
*
* Simple monitor.
*
* %Description
* A square single monitor that measures the intergated intensity of the incoming x-rays.
*
* Example: Monitor(xwidth=0.1, yheight=0.1)
*
* %Parameters
* INPUT PARAMETERS:
*
* xwidth:   [m] Width of detector.
* yheight:  [m] Height of detector.
* restore_xray: [m] If set, the monitor does not influence the xray state
*
* CALCULATED PARAMETERS:
*
* N:      Array of x.ray counts
* p:      Array of x-ray weight counts
* p2:     Array of second moments
*
* %End
*******************************************************************************/

DEFINE COMPONENT Monitor

SETTING PARAMETERS (xwidth=0.1, yheight=0.1, restore_xray=0)

/* X-ray parameters: (x,y,z,kx,ky,kz,phi,t,Ex,Ey,Ez,p) */ 
DECLARE
%{
  double Nsum;
  double psum;
  double p2sum;
  double xmin;
  double xmax;
  double ymin;
  double ymax;
%}

INITIALIZE
%{
    xmax = xwidth/2;  xmin = -xmax;
    ymax = yheight/2; ymin = -ymax;

    if ((xmin >= xmax) || (ymin >= ymax)) {
            printf("E_monitor: %s: Null detection area !\n"
                   "ERROR      (xwidth,yheight,xmin,xmax,ymin,ymax). Exiting",
           NAME_CURRENT_COMP);
      exit(0);
    }
    Nsum=0;
    psum=0;
    p2sum=0;
%}

TRACE
%{
    PROP_Z0;
    if (x>xmin && x<xmax && y>ymin && y<ymax)
    {
      double p2 = p*p;
#pragma acc atomic
      Nsum = Nsum +1;;
#pragma acc atomic
      psum += p;
#pragma acc atomic
      p2sum += p2;
      SCATTER;
    }
    if (restore_xray) {
      RESTORE_XRAY(INDEX_CURRENT_COMP, x, y, z, kx, ky, kz, phi, t, Ex, Ey, Ez, p);
    }
%}

SAVE
%{
  char title[1024];
  snprintf(title,1023,"Single monitor %s",NAME_CURRENT_COMP);
  DETECTOR_OUT_0D(title, (double) Nsum, psum, p2sum);
%}

MCDISPLAY
%{
  
  multiline(5, (double)xmin, (double)ymin, 0.0,
               (double)xmax, (double)ymin, 0.0,
               (double)xmax, (double)ymax, 0.0,
               (double)xmin, (double)ymax, 0.0,
               (double)xmin, (double)ymin, 0.0);
%}

END
