Understanding selected gate for each row in the trace table

[wizicer]

I'm trying to visualize the selected gate for each row in the trace table.

I'm particularly interested in the eval_vanishing_poly function, but I'm struggling to understand the relationship between this function and the gate activation.

Could anybody provide some guidance or resources on this topic? Any help would be greatly appreciated.

Appendix:

Figure 1: example in visualizing gate for each row in the trace table with halo2 backend.

Figure 2: example in visualizing trace table with plonky2 without selected gate.