Hi all,
I'm searching for an optimised solution for the following:
Assume I have a line represented by, make it 10000 points. The vertices
are stored in an array and are fixed. I have different colours for all
the points. Now I want to "animate" the colours. E.g. I want to treat
the colour array as a circular buffer and just move all the colours one
step over. Obviously I can do it by manipulating the array, but then
the whole array must be uploaded to the GPU again.
I've thought about making a colour array twice the size of the number of
vertices and then telling OpenGL to start picking colours from a point
in this array, but I don't know how to tell OSG this is what I want.
osg::Geometry seems to default to the start of the array for drawing.
Is there a way to do this in OSG without making my own drawImplementation?
regards
jp
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