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use nalgebra::{Point as PointBase, SVector};
use crate::{constraint::Constraint, force::Force};
pub const N: usize = 2;
pub type Scalar = f64;
pub type Vector = SVector<Scalar, N>;
pub type Point = PointBase<Scalar, N>;
#[derive(Debug)]
pub struct Particle {
pub mass: Scalar,
pub position: Point,
pub velocity: Vector,
/// Force accumulator
pub force: Vector,
}
impl Particle {
pub fn new(position: Point, mass: Scalar) -> Self {
Self {
mass,
position,
velocity: Vector::zeros(),
force: Vector::zeros(),
}
}
pub fn apply_force(&mut self, force: Vector) {
self.force += force;
}
pub fn reset_force(&mut self) {
self.force = Vector::zeros()
}
}
// #[derive(Debug)]
pub struct ParticleSystem {
pub particles: Vec<Particle>,
pub constraints: Vec<Box<dyn Constraint>>,
pub forces: Vec<Box<dyn Force>>,
/// Simulation clock
pub t: Scalar,
}
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