Hi Harald and Andreas,
Simple collision detection is easy: You can do that with an
intersect-visitor and test if a given beam intersects something. This way
you could simulate a sensor that looks at exactly one direction.
There are more sophisticated methods, but others will have to comment on
that.
There is a good article on GameDev.net that explains how to do collision
detection between ellipsoids and polygons. I've used it to implement
viewer-world collision detection and it works fine:
http://www.gamedev.net/reference/articles/article1026.asp
The ray-polygon intersection test performed by osgUtil::IntersectVisitor is
not enough for this kind of collision detection (unless you can model the
collider as a point rather than as an ellipsoid).
When the project I'm working on is finished I'll be able to release my CD
code as open source.
Cheers,
Marco
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