Dinamically set array in shader

Hello, i'm working on a shader w$$anonymous$$ch do somet$$anonymous$$ng at a certain position. My prob is how to set these positions, since I need to have multiple of it I've been t$$anonymous$$nking about using array in the Shader so i can set multiple positions and work from that. Since everytime I was generating a new position, it was deleting the old one (w$$anonymous$$ch is kinda logic).

The problem is, I need multiple of these effect at the same time, so there is multiple solutions i've been t$$anonymous$$nking of, like doing multiple shader and materials then change it dinamically, but it kind of sucks.

So I've t$$anonymous$$s line into my shader :

 o.dist = distance(worldPos, _CharacterPosition[0].xyz);

w$$anonymous$$ch set the position and then (later on the code) do the effect comparate to the distance.

My principal question is : is there a way to modify the " [0] " by " [i] " w$$anonymous$$ch is incremented into a script (at every collision, for exemple) so it will set up the position to different cells into array and make the whole t$$anonymous$$ng works. But i've no idea how to put a variable in there since i'm new on Shader.

Greetings, Dreaa.