Coverage meter: the fraction of the plan's bits confirmed so far — weighted
by each feature's discriminability (a confirmed ellipse advances it far more
than a confirmed background), never a probability. Reaches 1 when every check
is done. (A probe step carries 0 bits, so it doesn't move the meter.)
Coverage meter: the fraction of the plan's bits confirmed so far — weighted by each feature's discriminability (a confirmed ellipse advances it far more than a confirmed background), never a probability. Reaches 1 when every check is done. (A probe step carries 0 bits, so it doesn't move the meter.)