As for with standard objects, you might have success by joining the
planes of the matrix with corresponding coordinate values, and then
mask with @op == to test for the value passed to jit.bsort.
Otherwise, Java support might work for your needs if you're
comfortable with them. Take a peek at the jitvecprocess-example.pat
example and the Java tutorial for an initial introduction to
traversing Jitter Matrix values from within Java.