[pgrouting-dev] How many people use the wrapper functions?

[Worth Lutz]

Hi Steve,

I used one of the wrappers, shootingstar_sp_smart I think, but had to modify
it due to problems. I think that it is the one which uses shooting star
which I've since heard doesn't work.

I think that it works for us as all we are using is length as cost to find
the length from a to b. No turn restrictions or anything.

I chose it because the wrapper let me choose a point and it split the
nearest edge and hooked up the point to that edge at the split.

Another reason I chose it was that it worked for the following situation:

          ----------\
         /           \
        /             \
A -----/               B
|_____________________/


Other algorithms would choose the upper edge because that is what was found
first as they tried to go from A to B. I was just learning about routing and
did not want to go figure out how to modify my network to split the long
path where there were multiple paths between nodes.

I've been following your work lately as I will be upgrading our situation to
Postgres 9 and PostGIS 2 at some point. I was waiting for you to get things
settled out before asking which algorithm I should look at to replace
shootingstar.

Thanks for your work on this project.

Worth Lutz


-----Original Message-----
From: pgrouting-dev-bounces at lists.osgeo.org
[mailto:pgrouting-dev-bounces at lists.osgeo.org] On Behalf Of Stephen
Woodbridge
Sent: Saturday, May 11, 2013 4:21 PM
To: pgRouting Users List; pgRouting Dev List
Subject: [pgrouting-dev] How many people use the wrapper functions?

Hi all,

Daniel and I have been wondering if people use the wrapper function 
versus the core functions directly? Or if you have written your own 
wrapper functions? etc.

The core functions are the low level function that directly call the 
internal library functions.

The wrapper functions are all the additional plpgsql convenience 
functions that generate more complex SQL queries and then call the core 
functions.

I know that I never use the wrapper functions because I found them to 
messy and inconsistent and have hard coded values in them, etc. So I 
wrote my own high level wrapper functions that made it easy for me to 
work with the core functions.

So I thought it would be wise to ask our users what they use? and how 
they use pgRouting, so we do not may a decision like "Throw out the 
wrapper functions" without some input from the user community.

PLEASE TAKE ACTION and let us know!

Thanks,
   -Steve
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