[osg-users] design issues

Trajce Nikolov NICK trajce.nikolov.nick at gmail.com
Wed Nov 2 15:25:17 PDT 2016

Hi Community,

I am trying to optimize the rendering. Getting huge update numbers.

The story is this:
My scene has huge number of lights, some are static (streetlights) some
dynamic (a car). The lighting engine needs the World matrix of a
LightSource and the ViewMatrix (which is the same as the World inverse just
with some extra rotation). In my code after the update before the rendering
traversal I am updating these matrices each frame and I am about to place
this code in my custom CullVisitor (which traverse the scene anyway but
only the active children).

Here is my approach at the moment: list of light entities and here is how I
am computing these:
Simply getting the NodePath and computing the world matrix from this node
path. This seams to be costly

I am after wiser optimization, to place this in my CullVistor: Here is the

These snippets are simple and I would like to ask if this is more proper
way, which it seams to me since I will gain more performance by updating
only the culled and active nodes. Also the math in the cull visitor.

Thanks a lot for any hints, ideas. As always :-)


trajce nikolov nick
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