Rotate local xyz around global position (help)

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Danny

Hi all,

I'm in URGENT need of some mathematical assistance...

I've got a GLOBAL position XYZ and a GLOBAL rotation PYR. Then I have 3 LOCAL coordinates (ABC) that act as a 'local offset'.

My Question is: How do I transform those 3 local coordinates ABC around the global coordinates XYZ using the global rotation PYR and obtain those new coordinates?

I basically need what TFormPoint() does. But since I have to do this 'outside of blitz' (in visual basic) I can't use tFormPoint - or any other Blitz3D commands :((
Any help would be a total life safer! ;)

Thanks in advance,

Danny.