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use crate::prelude::*;

pub trait Noise {

    fn new() -> Self;

    /// 2D noise for the given position
    fn get_2d(&self, p: (FP, FP)) -> FP;

    // 2D fbm for the given position and the octaves
    fn fbm_2d(&self, p: (FP, FP), octaves: i32) -> FP;

    /// 2D hash
    #[inline(always)]
    fn hash2d(&self, p: FP2) -> FP {
        let mut p3 = glm::fract(&FP3::new(p.x * 0.13, p.y * 0.13, p.x * 0.13));

        let dot = glm::dot(&p3, &(FP3::new(p3.y + 3.333, p3.z + 3.333, p3.x + 3.333)));

        p3.x += dot; p3.y += dot; p3.z += dot;
        ((p3.x + p3.y) * p3.z).fract()
    }

    /// Mix for FP
    #[inline(always)]
    fn mix(&self, a: &FP, b: &FP, v: &FP) -> FP {
        (1.0 - v) * a + b * v
    }
}