Robert
Return of an old question!
If the corners of the bounding volume (I assume a box) are all outside
the view frustrum would that node be culled? I assume a bounding box is
used as I would expect a bounding sphere to generally interact with the
view frustrum.
I expect it is from what is happening. Therefore is there a simple way
of ensuring that culling does not occur on objects within, say, a
specified distance of the viewer.
Regards
Alan Harris
Robert Osfield wrote:
Hi Alan,
On 4/16/07, Alan Harris <[EMAIL PROTECTED]> wrote:
Out of interest, when on a terrain (view height 2m) what points of the
terrain grid rectangle (say 50m x 50m) that you are "stood" on are used
to determine culling. The middle or corner points - it's possible that
all five could be outside the view frustrum? I ask because it appears
this rectangle is sometimes culled although part of it is visible.
For view frustum culling the enclosing bounding volume is used so all
points should be taken into account.
For cluster culling a single control point is used with a deviation
angle, these values should be computed to make sure that all points
are always seen, the control point usually sits above all points on
tile. If the values are computed correctly then the cluster culling
will result in premature culling.
Robert.
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