On 02/16/2012 08:22 AM, Sajjadul Islam wrote:
Hi,
I am going through an osg example and one point there is a statement as follows:
Code:
stateset->setRenderBinDetails(-1,"RenderBin");
When OSG traverses a scene for rendering, it organizes geometry into
separate render bins. Each bin has an index and a sorting mode. When
it comes time to actually draw the geometry, the render bins are
traversed in order of index (lowest to highest), and the geometry in
those bins are drawn after being sorted according to the sorting mode.
In this case the index of -1 means that the geometry in this bin will be
drawn before the rest of the geometry (which by default goes into bin
0). "RenderBin" is the default sort order (which happens to be
SORT_BY_STATE).
In this case, there must be some geometry that is required to be
rendered before the rest of the scene. Since you didn't mention which
osg example you were looking at, that's all I can say about it.
--"J"
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