Code shared from the Rust Playground

playground.rs

pub struct DemDiscrete {
    pub  y: Vec<f32>,
    pub  x: Vec<f32>,
    pub  fx: Vec<f32>,
}
    
pub trait Base{
    fn get_fx(&self)-> &Vec<f32>;
    fn get_x(&self)-> &Vec<f32>;
    fn get_y(&self)-> &Vec<f32>;
    fn get_mut_fx(&mut self)-> &mut Vec<f32>;
    fn get_mut_x(&mut self)-> &mut Vec<f32>;
    fn get_mut_y(&mut self)-> &mut Vec<f32>;
}

impl Base for DemDiscrete{
    fn get_fx(&self) -> &Vec<f32>{
        &self.fx
    }
    fn get_x(&self) -> &Vec<f32>{
        &self.x
    }
    fn get_y(&self) -> &Vec<f32>{
        &self.y
    }
    fn get_mut_fx(&mut self) -> &mut Vec<f32>{
        &mut self.fx
    }
    fn get_mut_x(&mut self) -> &mut Vec<f32>{
        &mut self.x
    }
    fn get_mut_y(&mut self) -> &mut Vec<f32>{
        &mut self.y
    }
}
    
fn body_force<T:Base>(entity: &mut T){
    let fx = entity.get_mut_fx();
    let x = entity.get_mut_x();
    
    for i in 0..fx.len(){
        fx[i] += 10.;
        x[i] += 1.;
    }
}
fn main(){
    let mut ent = DemDiscrete{
        x: vec![1., 2., 3.],
        y: vec![1., 2., 3.],
        fx: vec![1., 2., 3.],
    };
    body_force(&mut ent);
}