overlap&highlight

[Sergey Petrov]

In ASCEDB 3.3 vmap viewer the length of highlighted aligned fragments (e.g. chromosome
bands) is wrong if fragments overlap. When map is drawn, the every next fragment is
displayed on the top of previous one. So, highlighted fragment is partly covered and
is not seen.
To fix it i modifyed vMapReColor in vmapdisp.c: white (transparent) fragments are drawn
in another cycle before all others.
I wonder if the solution is sound and if a better one exists.

Sergey Petrov