Hi everyone,
I'm new to OpenCARP and having trouble getting stimulus to work in my simulations. I'm using the Docker version (git hash 4f19932) on Mac.
My simulation runs fine - the mesh loads, the Tomek model works, everything completes without errors. But the tissue never gets stimulated. When I check the Stimulus_0.trc file, it shows 0.000 nodes selected every time.
I've tried several approaches:
First attempt - geometric stimulus using x0, xd, y0, yd parameters to define a box on the left side of my tissue. I made sure the coordinates overlap with actual nodes in my mesh, but still 0 nodes selected.
Second attempt - made the stimulus box much bigger to cover the entire left side. Still nothing.
Third attempt - created an explicit vertex file (left_stim.vtx) with 84 specific node numbers and used stimtype 1. The file format looks correct (first line is the count, then one node index per line). Still 0 nodes.
Fourth attempt - tried changing my mesh element regions from 1 to 0 in case there was a mismatch. No difference.
The weird thing is there's no error message - the simulation just runs and ignores the stimulus completely. The electrics.log file doesn't even mention stimulus initialization.
My mesh is a 2D triangular mesh with 1038 nodes and 1804 elements. Here's a typical command I'm using:
openCARP -meshname mesh_name -simID test -tend 100 -dt 0.02
-parab_solve 1 -num_imp_regions 1 -imp_region[0].im Tomek
-imp_region[0].num_IDs 1 -imp_region[0].ID[0] 0
-num_stim 1 -stimulus[0].stimtype 1
-stimulus[0].vtx_file left_stim.vtx
-stimulus[0].strength -80.0 -stimulus[0].duration 2.0
-stimulus[0].start 10.0 -bidomain 0
Is there something obvious I'm missing? Or is there a known issue with stimulus in this Docker version? Any suggestions would be really helpful - I've been stuck on this for a while!
Thanks in advance for any help!
