Mel expression - PP procedural animation

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  12 December 2011
Mel expression - PP procedural animation

Hi, First post on here - hope its in the right place.

I'm looking (to begin with) to simply create a PP expression that can make a particle move in
a straight line (with no end point) just continuous forward motion. I have no idea where to begin
as i've never used a PP for specific motion (only rand motion using sin etc)

This is the first step and a long as i can get this to work eventually i would like to make the expression to allow the particle to gradually curve etc.

Any help or advice anyone could give would be greatly appreciated

 
  12 December 2011
Well, you can give the particles a velocity in a certain direction with something like:


velocity = <<1,0,0>>;


Or you place them manually in the predynamics script:


vector $p=position;
float $speed = .1;
position = <<$p.x + $speed , $p.y, $p.z>>;
 
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  12 December 2011
Yeah thats just what i was after - but what would i do if i wanted to make it slowly curve (without using an acutal curve) is it possible?
 
  12 December 2011
Just add a smaller amount to the Y or Z components (smaller to make the curve gradual). That will give it a circular path, the smaller the increments, the larger the radius.

If you want more complex curves, you need a more complex equation.

<* Wes *>
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  12 December 2011
but wont just reducing the amount in the velocity make it move slower in a linear direction? do i need a different pp or expression to make the particle curve?
 
  12 December 2011
bump......
 
  12 December 2011
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