i want searching shortest distance to polygon-polygon.
for example, see below image.
[ATTACH=CONFIG]25442[/ATTACH]
there are some polygons.
1. i want to search shortest polygon from 'a'(for example)
??? in this case(above image), it's 'd'
2. and want to calculate distance for 'a' to 'd'(length of red line)
please, help me~~^^