How does routing work?

[jusc]

I just wonder, why ways through forests are not choosen for shortest ways by foot. It routes me over streets around the forest.
If you try the same "goal" with a Garmin device p. E. with the openmtb map it works. Does Locus use Google routing even if I use an OSM vektor map?
But maybe a handling problem.

You may try this

[Menion]

I cannot use google routing, it have to be used only on google maps as I read. Which service compute routing is set in settings. So if you use MapQuest and it compute route around a forest, then try CloudMade. It just have nothing to do with Locus, but it's a problem of used web service. It have no effect if you use vector maps or any other

[jusc]

Thanks, sometimes the solution is so easy. Cloudmade routing does what I want.  

[Menion]

fine, anyway CloudMade is missing some important data for Route planning on road, like exits etc. So from my experience, MapQuest is good for car, CloudMade for bike and walk ...