halion Posted June 27, 2004 Share Posted June 27, 2004 Ok so I have a grid that is my particle source and I have a nurbs curve that I want the particles from the grid to follow from point 0 to the last point. So I figured I could use the creep pop. I setup the pop network I have a source which is the grid and it births particles into a group called birth then I put a group pop to take everything from birth group and put them into another group called att. Now I put a creep pop made the source group att and the sop is the curve. When I hit play it just shoots particles up from the point 0 position. Now I want the particles to go from point 0 to point 1 to point 2 etc. I tried writing a expression in the prim u/v fields, it was if($FF>=1,$POSUVU == $POSUVU + 1,0) and then for $POSUVV it was the same. The problem is the value stays at 0. Why doesn't it keep adding to 0 each frame? Quote Link to comment Share on other sites More sharing options...
old school Posted June 28, 2004 Share Posted June 28, 2004 Creep doesn't work well with curves. It will flatten out your particles. It works best if you turn the curve in to a surface by sweeping a line or offsetting it and skinning. Quote Link to comment Share on other sites More sharing options...
halion Posted June 30, 2004 Author Share Posted June 30, 2004 Thanks for the information but I'm wondering how do I get a particle to go from u 0 to say u 10. I tried expressions like the one I mentioned in my first post but I always seem to end of with the particles picking one point then flying off in some odd direction. Quote Link to comment Share on other sites More sharing options...
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