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From Paul Martz, updated the LOD documentation

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Robert Osfield 2007-02-28 10:08:45 +00:00
parent a59bfdfced
commit 459696fdb2
1 changed files with 7 additions and 7 deletions
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include/osg/LOD
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@ -24,13 +24,13 @@ namespace osg {
the eye point are rendered at a lower level of detail, and at times the eye point are rendered at a lower level of detail, and at times
of high stress on the graphics pipeline lower levels of detail can of high stress on the graphics pipeline lower levels of detail can
also be chosen. also be chosen.
The children are ordered from most detailed (for close up views) to the least Each child has a corresponding valid range consisting of a minimum
(see from a distance), and a set of ranges are used to decide which LOD is used and maximum distance. Given a distance to the viewer (d), LOD displays
at different view distances, the criteria used is child 'i' is used when a child if min <= d < max. LOD may display multiple children simultaneously
range[i]<dist<range[i+1] is true. This requires there to be n+1 range values where the number of if their corresponding ranges overlap. Children can be in any order,
children is n, since no maximum distance of infinity is assumed. If the number of range values (m) and don't need to be sorted by range or amount of detail. If the number of
is insufficient then the children m through to n will be ignored, only 0..m-1 will be used ranges (m) is less than the number of children (n), then children m+1 through
during rendering. n are ignored.
*/ */
class OSG_EXPORT LOD : public Group class OSG_EXPORT LOD : public Group
{ {