Hi all!
I'm currently working on a small simulation that requires me to vary the geometry (specifically, changing epsilon) as Meep is running. From what I've gleaned through looking in the archives, I would need to set up my new geometry, call init-structure, and then meep-fields-phase-in-material but I can't seem to get my code working. When I run my code, Meep will either finish after 1 step with no errors or show strangely shaped epsilons distributed outside of where they should be centred. I was hoping someone would have any tips on how to implement fields-phase-in-material correctly using Scheme. Here are the relevant bits of my code; (set! geometry-lattice (make lattice (size 20 4 no-size))) (set! pml-layers (list (make pml (thickness 1)))) (set! resolution 20) (set! geometry (list (make block (center -5 0) (size 10 0.22 infinity) (material (make dielectric (epsilon eps)))) (make block (center 5 0) (size 10 0.22 infinity) (material (make dielectric (epsilon eps)))) ) ) (set! sources (list (make source (src (make continuous-src (frequency w1))) (component Ez) (center -8 0) (size 0 0.22)))) ;input 3 vector, output modulation profile (define modulationProfile (lambda (position) ; (+ eps (* 0.5 (cos (+ (* Omega (meep-time)) (* q (vector3-x position)))))) 1 )) (define (updateEpsilon) (set! geometry (list ;unmodulated region (make block (center -5 0) (size 10 0.22 infinity) (material (make dielectric (epsilon eps)))) ;modulated region (make block (center 5 0) (size 10 0.22 infinity) (material (make material-function (epsilon-func modulationProfile)))) )) (init-structure) (meep-fields-phase-in-material fields structure 1) ) (use-output-directory) (run-until 100 (at-every 1 output-epsilon (output-png Ez "-S3 -Zc dkbluered -C $EPS") updateEpsilon) ) I also had a look at the corresponding C++ function https://github.com/stevengj/meep/blob/master/src/fields.cpp#L582, but the only hint I see is that possibly the set of chunks i'm trying to phase in are not similar. Best, Daniel
_______________________________________________ meep-discuss mailing list meep-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
