Hi Robert,
Hi Sebastian,
Simply do use a MatrixTransform (or other Transform node) above the
subgraph you want to place in the scene, keep the subgraph with a
local origin use the transform to place the subgraph in it's final
ECEF coordinates. This is basically the same approached used by
osgTerrain/VPB to avoid precision issues.
Mmh, thats more or less what I do. I use a MatrixTransform setup from
the pick-position and place my model below. Is this what you meant by
local origin?
Robert.
On 11 December 2013 10:41, Sebastian Messerschmidt
<[email protected]
<mailto:[email protected]>> wrote:
Hi folks,
I was thinking if I could improve precision and z-fighting issues
for my geocentric database (built with VPB) by placing models
differently.
Right now I'm using a pickvisitor to get the geocentric position
on the terrain and place the model directly by putting it in the
root of the scene with absolute coordinates.
Is there some clever way to put it relative to the terrain-tile,
so the precision is better than using absolute placing?
Bonus would be If the models could stay at their separate group
somehow.
I'm having this idea, since the osg::Terrain is doing the
high-precision matrix calculation inside the graph, presenting a
ModelViewMatrix with relatively low values.
P.S. I cannot use osgEarth here really, as the database is built
with VPB, and I need superfast loading times.
cheers
Sebastian
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