hi, Im trying to implement poly-poly collison in my engine, it works great,I can calculate if a point is in the polys plane and if it is in the poly, but when I rotate,translate or scale the object the collision fails because it is still working with the "original" vertices... Do I have to get the current modelview matrix and then multiply it with all of my vertices....??? Or is there a way around this... is it possible to get the translated vertices from the pipeline or do I have to translate all twice... one normal and one custom round....??? Is there something easy I missed or is it even more complex....?? thanks,

You cant read back transformed vertices. You have to multiply all moved/rotated/scaled vertices by modelview matrix. Why do you need poly-poly collision anyway? Try creting elipsoid CD first.

There are more worlds than the one that you hold in your hand...