nalgebra/examples/scalar_genericity.rs

34 lines
843 B
Rust

extern crate alga;
extern crate nalgebra as na;
use alga::general::{Real, RingCommutative};
use na::{Scalar, Vector3};
fn print_vector<N: Scalar>(m: &Vector3<N>) {
println!("{:?}", m)
}
fn print_squared_norm<N: Scalar + RingCommutative>(v: &Vector3<N>) {
// NOTE: alternatively, nalgebra already defines `v.squared_norm()`.
let sqnorm = v.dot(v);
println!("{:?}", sqnorm);
}
fn print_norm<N: Real>(v: &Vector3<N>) {
// NOTE: alternatively, nalgebra already defines `v.norm()`.
let norm = v.dot(v).sqrt();
// The Real bound implies that N is Display so we can
// use "{}" instead of "{:?}" for the format string.
println!("{}", norm)
}
fn main() {
let v1 = Vector3::new(1, 2, 3);
let v2 = Vector3::new(1.0, 2.0, 3.0);
print_vector(&v1);
print_squared_norm(&v1);
print_norm(&v2);
}