Hi,
There is some code in the _computeCorrectBindingsAndArraySizes (below) that
assumes it is impossible to have numElements==numVertices in the normal array
and , for example, be BIND_PER_PRIMITIVE. The code resets to BIND_PER_VERTEX.
Consider a series of triangle primitives making a "strip" that loops back on
itself, say 4 nodes on the top edge, and 4 on the bottom for a total of 8
vertices. Like , for example, the sides of a cube as tris.
The number of triangles to make this "strip" is actually 8. So in this case
numElements==numVertices and BIND_PER_PRIMITIVE is perfectly OK.
Code:
if (numElements==numVertices)
{
// correct the binding to per vertex.
if (arrayData.binding!=osg::Geometry::BIND_PER_VERTEX)
{
out<<"Warning: in
osg::Geometry::computeCorrectBindingsAndArraySizes() "<<std::endl
<<" "<<arrayName<<" binding has been reset to
BIND_PER_VERTEX"<<std::endl;
arrayData.binding = osg::Geometry::BIND_PER_VERTEX;
}
return;
}
...
Andrew
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=28077#28077
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