Hello Christoph,
On 11/08/2011 03:28 AM, "Christoph Fünfzig" wrote:
> please consider the following case:
> I want to store a terrain as a geometry node
> (Positions and Normals as VBOs).
> Now I want to change small parts
> inside the Positions and Normals arrays only..
ok.
> What change policy for VBOs is actually used?
Not sure what you mean? GeoProperty is handled the same way as all field
containers.
> With the "changed" marking of arrays,
> would it make sense to subdivide the terrain (in a cluster)?
perhaps, if sending the data over the network becomes a bottleneck.
> Is it possible to change arrays without getting entries
> into the change list?
well, there is always const_cast<> ;)
It's also probably going to break all sorts of things. More importantly,
what would be the upside? If you are not running in a cluster you could
make the CL read only (and anyway the CL does not consume large amounts
of memory), if you are running in a cluster, you make your scene
inconsistent by changing the values and not distributing them.
Cheers,
Carsten
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