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use number_traits::{Cast, Num};

#[inline]
pub fn linear<T, F>(p0: T, p1: T, t: F) -> T
where
    T: Copy + Num + Cast<F>,
    F: Copy + Num + Cast<T>,
{
    if t <= F::zero() {
        p0
    } else if t >= F::one() {
        p1
    } else {
        let x0 = p0.cast();
        let x1 = p1.cast();
        (x0 + (x1 - x0) * t).cast()
    }
}
#[test]
fn test_linear() {
    assert_eq!(linear(0, 200, 0.25), 50);
    assert_eq!(linear(0, 200, 0.5), 100);
    assert_eq!(linear(0, 200, 0.75), 150);
}