I'm having a “senior moment” and I'm stuck on something that I'm sure is relatively simple - what's the best way to color points or particles based on their density or proximity to each other? I want to increase point color where the area density of the points is higher. Density *$CR, in a nutshell. And as a supplemental question, how best to bake that point cloud information into a texture lookup?

so im not sure if this is the best way, (i dont think its entirely accurate), but i think it works

point clouds and a while loop.
I use this all the time.

for any one looking at this post in 2019 just put this piece of vex code in a point wrangle its much more efficient.

int pc = pcfind(0,'P',@P,ch('maxdist'),ch('maxpt'));
@Cd = float(len(pc))/ch('maxpt');

explanation on how the code works:
pcfind generates an array with the maximum size of maxpt
len counts how many items there are in the array and divides it by maxpt to get a 0-1 value the float conversion is there as len returns an int and if its not converted the division would return an int giving us a binary 0 or 1 value.



To visualCortexLab if you ever read this thankyou for the inspiration on how to do this.

i dont know if its only for me but the website isent showing the square brakets that are after int pc“square brakets here”

cabegesoop
int pc = pcfind(0,'P',@P,ch('maxdist'),ch('maxpt'));
@Cd = float(len(pc))/ch('maxpt');

nice tip, the simplest solution is usually a better one

cabegesoop
int pc = pcfind(0,'P',@P,ch('maxdist'),ch('maxpt'));
@Cd = float(len(pc))/ch('maxpt');

how do you do this in VOP?

luidox
how do you do this in VOP?