raytracing not being added to equations

so idk if this is a bug or not but I think it is sense it doesn't show errors or do anything for that matter but whenever I try to adding raytracing to an equation it just doesn't work in game sense I'm trying to make it so a beam of particles will start at the players head to the nearest block or to the max distance the raytrace will allow but it just doesn't work so is this a bug or is this normal