getting other particle's position

[gonzamoiguer]

Hi, im relatively new to shaders, looking for a way so that each particle can loop other particle's position, as to perform simple collision detection. Not asking specifically for code but as a general idea or guide to read. Thanks, this addon is super helpful!

[micuat]

(i know this is a year old comment)
it's hard because each vertex don't share attributes with other vertices unless you use cuda. one common approach (in 2D) is to first write a density map of particles and each vertex reads that map to avoid / prefer dense areas in the map, which ends up in a collision-like effect (sorry no time to look for an example)