Recording just the scattering events in the trace

[dheligman]

Hi,

I was wondering if it was possible to just trace where scattering events occur and exclude the locations where the photon crosses a layer boundary?

best,
Daniel

[xopto]

Hi,
It is possible but not during the MC simulation. You would have to do custom filtering of the trace data, based on the change in the direction, location, and weight of the packet. Note that 0-degree scattering events in a nonabsorbing medium cannot be resolved from a clean propagation step.

[dheligman]

Would it be possible to add an extra flag to the trace flag to only record scattering events?

[dheligman]

I am doing some simulations that take up a lot of memory and it could reduce memory requirements

[xopto]

A general feature that would allow filtering of events in the kernel is planned but not yet available.
Feel free to modify the kernel template to fit your needs. I am attaching a modified mcml.template.c example that illustrates this with one additional bool variable (search for packet_scattered variable).
mcml.template.zip