I ran into bunch of problems during implementation, maybe someone could explain me what should i do in order to transfer one data cell into another

so we have 2d grid of cells which consist (density and velocity vector)

each timestep (dt), we use advection

that would be simple if i could just transfer one velocity to another cell each frame, but unfortunatetly that doesnt work that way, it can transfer some part of density and velocity to other cell or even do not transfer anything at all, i was searching for references but ended up with navier stoakes equations etc. which don't say anything to me, to be honest its a bunch of gibberish called math that normal person doesn't understand.

anyway maybe someone knows the implementation of this so an average person could understand that.

i dont need equations/code but explenation what to do.

cheers.

yes i saw that code, but its a total mess, not to mention variable names and swap, poject functions etc. real pain to read it, lets say i dont speak chinese.

This just a code without any good explanation (i saw the article too),

i need to understand steps beghind it to write that in GLSL

thats the main reason i am asking because:

yeah but it doesnt work when we move further than one cell. Well it would work if i wasnt trying to accomplish that on gles 2 which supports only fragment and vertex shaders,

i forgot what i wanted to say so ill leave this post now.