/*******************************************************************************
*
* McStas, the neutron ray-tracing package: Beamstop_circular component
*         Copyright 2000-2001 Risoe National Laboratory, Roskilde, Denmark
*
* %I
* Written by: Kristian Nielsen
* Date: January 2000
* Version: $Revision: 1.16 $
* Origin: McStas 1.5 (Obsolete)
* Modified by: EF, 2004. Renamed to optics/Beamstop with rect/circle shapes
*
* Circular beam stop.
*
* %D
* A simple circular beam stop. Infinitely thin and infinitely absorbing.
* OBSOLETE: rather use optics/Beamstop supporting both rect/circle shapes
*
* %P
* INPUT PARAMETERS
*
* radius: radius of the beam stop (m)
*
* %E
*******************************************************************************/

DEFINE COMPONENT Beamstop_circular
DEFINITION PARAMETERS ()
SETTING PARAMETERS (radius=0.1)
STATE PARAMETERS (x,y,z,vx,vy,vz,t,s1,s2,p)

TRACE
%{
    PROP_Z0;
    if(x*x + y*y <= radius*radius)
      ABSORB;
%}

MCDISPLAY
%{
  magnify("xy");
  circle("xy", 0, 0, 0, radius);
%}

END