[Tilecache] how to calculate BBOX for tiles

[Kevin Kempfer]

Hi List!

I am trying to selectivly delete tiles from TileCache for specific 
BBOXes in order to regenerate parts of the map. I am using this script 
which Tim posted two years ago:
http://n2.nabble.com/locating-bad-tiles...-td1836476.html

Supplying the URL which OpenLayers generates for a specific tile 
refreshes this tile in the TileCache.

So I need to know how OpenLayers calculates the BBOXes for the tiles to 
be requested. Can someone point me to this piece of code?

Here is what should happen:

- I have the BBOX of the part of the map that should be regenerated
- calculate the corresponding tiles in all zoom levels
- pass these tiles' BBOX to Tim's script that regenerates the matching 
tiles in the TileCache

Thanks for any hints - or even better approaches.

Kevin

P.S.: CC to the tilecache list, maybe someone there has a better method 
for deleting parts of the tilecache?!
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/x-pkcs7-signature
Size: 3249 bytes
Desc: S/MIME Cryptographic Signature
Url : http://lists.osgeo.org/pipermail/tilecache/attachments/20090403/3e810ebd/smime.bin