Originally Posted by merlino3d
Actually I've found a way to make the particles orbit around his goal, using the goalOffset, but I can't find a way to make it a PP attribute, they are all moving together right now ... :( any idea?
EDIT: can't find a way to make it PP ... sorry
yea. I searched for goal offset after reading your post. It seems that there is not PP attribute option for this. And I found this link: http://forums.creativecow.net/thread/61/859854
He asked about the similar question I guess :I have got particles moving along a curved NURBS surface using goals and animating the goalU & goalV values.
I am happy with the general result but what I want is the ability to adjust how far above the surface the particles move.
Since i want them spread out over the surface, i cannot just offset the surface, use the offset surface as the goal and hide it. Since the surface is curved, I cant use a static value for the goal Offset. Using sphrand for the goalOffset did not produce good results either.
I would imagine I need an expression to determine the surface normal based on the goalU and goalV for each particle and then offset that particle along the normal."
Or, if it is possible to write some expression of offset based on particleId??