Controlling Amplitude of POP wind with VEX expressions

[yoo]

Hi, I am trying to apply pop wind force to only non-isolated points in flip sim. Basically I don't want to apply this force to droplets.

My VEX expression is like this but it doesn't seem to be working. Am I missing something or doing completely wrong? 

Thanks.

 

 

[DonRomano]

You should use pcfind(), nearpoints() works only on geometry I think. Just like this :

int count = chi("count");
float radius = ch("radius");

int pts[] = pcfind(0, "P" , @P, radius, count);

if(len(pts) < chi("threshold")) amp *= 0;

 

[yoo]

Thank you so much for replying, although the result looks the same as nearpoints function.

I ended up using sop solver and finding isolated points in there and output attribute then simply multiplying amplitude with this attribute in pop wind. This seems to be working.

Thanks,

[DonRomano]

You can also use a geometry wrangle and output an attribute, instead of using a sop solver which can be slower sometimes

[scaduxx]

On 11/3/2020 at 10:36 PM, yoo said:

Thank you so much for replying, although the result looks the same as nearpoints function.

I ended up using sop solver and finding isolated points in there and output attribute then simply multiplying amplitude with this attribute in pop wind. This seems to be working.

Thanks,

could you share how you did it?