[ODE] Proposal: Change Heightfield Origin
buijs512 at planet.nl
Thu Jul 13 12:36:33 MST 2006
Justin Couch wrote:
> Both DEM and DTED run in double precision. At a higher level, the VRML
> and X3D file formats only specify terrain in double precision. On the
> graphics side of things we end up doing a lot of local reprojections to
> try to keep rendering down to single precision that is implemented by
> the graphics card, but that's expensive calculations - particularly if
> you're doing it every frame as we would in a dynamic LOD'ed terrain
Sorry, you're right. I realize a lot more data is in double precision than I suspected. I worked
mostly with freely available datasets (usually low quality) in obscure formats, for things that did
not require high precision.
> I think I gave up too easily before, I'm going to have another stab at
> this because you're right - it is more logical. It's early enough in
> the life of this feature to change the ground rules about it's
> I'm not promising anything more successful, but it makes sense to aim
> for this - if only for the consistency aspect.
Sure, if it doesn't have significant performance/precision disadvantages, I'm ok with it.
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