Hi,

I'm curious about the time it takes to do intersection testing.

I have roughly 800 Image points that I need to check for intersection with my 
model.
My model isn't really complicated, it's basically just a huge box with a few 
rectangular elements that stand out a bit.
It was created using Sketchup and is in Collada file format. I use the method 
computeIntersections. I'm working with OSG 2.8.2.

However, even with kdtree support it takes about 120 to 190 ms to test for the 
800 intersections.
Without kdtrees it takes up to above 400 ms. I'm confused that it varies so 
much when the setup of the scene I tested was always the same.

I am by no means an expert in computer graphics, so I ask you. 
Is it normal that it takes so long even for kdtrees, or is it likely that I do 
something terribly wrong?

Thank you!

Cheers,
Dakota

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http://forum.openscenegraph.org/viewtopic.php?p=44379#44379





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