Reading the coordinates of particles

The positions of particles can be read into GICO by the command: 4 I(NCLUDE) P(ARTICLES) <filename> <mode of include, Trace oder Notrace> ; [example: I   P   RAYFIL   T ;]

<filename> may consist of up to 6 characters. The file must have the extension .RAY. If this command is used, the particles will be used in the commands PP and DH. If the trace mode is chosen for these commands. If mode Trace is used, the particles are multiplied with the actual system transfer matrix. With this command, the trace mode is activated, the particles will be traced trough the following optical elements. The first line of RAYFIL must contain the word RAYFILE and the number of coordinates for the particles.