[postgis-devel] GBOXF

[Olivier Courtin]

On Nov 28, 2011, at 6:38 PM, Paul Ramsey wrote:

> Olivier,
> Since the cached double box experiment seems to be getting dropped due
> to the performance loss, we're getting back to "what do we do with
> cached float boxes". Sandro wants to make sure the boxes attached to
> our LWGEOM instance are always consistent, which is hard when
> sometimes they are double (off calculated values) and sometimes float
> (off cached values).

I agree with Sandro consistency concern.

> One way to ensure consistency would be to make
> the GBOX actually be float (GBOXF). I recall you were very happy to
> have GBOX replace BOX2FLOAT4. Was that because GBOX is higher
> dimensional or because it is double based, or both?

Both in fact,

As double bbox are really convenient as our datas are double based.

> I want to know, so
> I can decide whether it's OK to replace GBOX with a GBOXF.


--
Olivier

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