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use crate::{
algebra::{Point, Scalar, Vector},
constraint::Constraint,
force::Force,
};
#[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,
}
impl ParticleSystem {
pub fn get_kinetic_energy(&self) -> Scalar {
self.particles.iter().fold(0.0, |acc, p| {
let velocity = p.velocity.norm();
let energy = p.mass * velocity * velocity / 2.0;
acc + energy
})
}
}
|
