Maya Particles, Instance Scale depending on distance from other particles

[adedunmola-olanrewaju]

Hi, I am trying to write a creation expression for particles that will scale the instances depending on how far the particle is from another particles. All the particles are birth on the same frame so i cant use AgePP for this. So if i have a plane where the center verterces are closer to together and the outer ones are futher apart, i want my instances spheres to be larger on the outside vertices than the ones on the inside vertices. I found a script on here that finds the distance between particles but failed to rewrite for my purpoes. any help would be appreciated. Thanks
-Dunmola

[chartt]

Hi AO

Example:  Plane - emit from surface - use the center of the plane as the origin.
Add radiusPP to the particles and change them to spheres.

Create a locator - to be where you want the zero point to be- t=in this case the center of plane.

//Put in creation
vector $loc, $pos;
float $dist;
float $scaleFactor = 0.1;

//get locator position
$loc = getAttr locator1.translate;
//get each particle location
$pos = position; 
//distance between
$dist=mag($pos - $loc);
// Set the size of the radiusPP
radiusPP = $dist * $scaleFactor;

So for instance objects the scale value = radiusPP
 C