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//! Extra functions for buffers of floating point numbers
use crate::referenced::{BitMaskRbRef, BitMaskRbRefMut};
#[cfg(feature = "alloc")]
use crate::owned::BitMaskRB;
#[cfg(feature = "alloc")]
impl BitMaskRB<f32> {
/// Gets the linearly interpolated value between the two values
/// at `index.floor()` and `index.ceil()`, where `index`
/// is an `f32`.
///
/// # Example
///
/// ```
/// # use bit_mask_ring_buf::BitMaskRB;
/// let mut rb = BitMaskRB::<f32>::new(4, 0.0);
/// rb[0] = 0.0;
/// rb[1] = 2.0;
/// rb[2] = 4.0;
/// rb[3] = 6.0;
///
/// assert!((rb.lin_interp(1.0) - 2.0).abs() <= f32::EPSILON);
/// assert!((rb.lin_interp(1.25) - 2.5).abs() <= f32::EPSILON);
/// assert!((rb.lin_interp(7.75) - 1.5).abs() <= f32::EPSILON);
/// assert!((rb.lin_interp(-0.5) - 3.0).abs() <= f32::EPSILON);
/// assert!((rb.lin_interp(-1.75) - 4.5).abs() <= f32::EPSILON);
/// ```
#[inline]
pub fn lin_interp(&self, index: f32) -> f32 {
lin_interp_f32(self, index)
}
}
#[cfg(feature = "alloc")]
impl BitMaskRB<f64> {
/// Gets the linearly interpolated value between the two values
/// at `index.floor()` and `index.ceil()`, where `index`
/// is an `f64`.
///
/// # Example
///
/// ```
/// # use bit_mask_ring_buf::BitMaskRB;
/// let mut rb = BitMaskRB::<f64>::new(4, 0.0);
/// rb[0] = 0.0;
/// rb[1] = 2.0;
/// rb[2] = 4.0;
/// rb[3] = 6.0;
///
/// assert!((rb.lin_interp(1.0) - 2.0).abs() <= f64::EPSILON);
/// assert!((rb.lin_interp(1.25) - 2.5).abs() <= f64::EPSILON);
/// assert!((rb.lin_interp(7.75) - 1.5).abs() <= f64::EPSILON);
/// assert!((rb.lin_interp(-0.5) - 3.0).abs() <= f64::EPSILON);
/// assert!((rb.lin_interp(-1.75) - 4.5).abs() <= f64::EPSILON);
/// ```
#[inline]
pub fn lin_interp(&self, index: f64) -> f64 {
lin_interp_f64(self, index)
}
}
impl<'a> BitMaskRbRef<'a, f32> {
/// Gets the linearly interpolated value between the two values
/// at `index.floor()` and `index.ceil()`, where `index`
/// is an `f32`.
///
/// # Example
///
/// ```
/// # use bit_mask_ring_buf::BitMaskRbRef;
/// let data: [f32; 4] = [0.0, 2.0, 4.0, 6.0];
/// let rb = BitMaskRbRef::new(&data);
///
/// assert!((rb.lin_interp(1.0) - 2.0).abs() <= f32::EPSILON);
/// assert!((rb.lin_interp(1.25) - 2.5).abs() <= f32::EPSILON);
/// assert!((rb.lin_interp(7.75) - 1.5).abs() <= f32::EPSILON);
/// assert!((rb.lin_interp(-0.5) - 3.0).abs() <= f32::EPSILON);
/// assert!((rb.lin_interp(-1.75) - 4.5).abs() <= f32::EPSILON);
/// ```
#[inline]
pub fn lin_interp(&self, index: f32) -> f32 {
lin_interp_f32(self, index)
}
}
impl<'a> BitMaskRbRef<'a, f64> {
/// Gets the linearly interpolated value between the two values
/// at `index.floor()` and `index.ceil()`, where `index`
/// is an `f64`.
///
/// # Example
///
/// ```
/// # use bit_mask_ring_buf::BitMaskRbRef;
/// let data: [f64; 4] = [0.0, 2.0, 4.0, 6.0];
/// let rb = BitMaskRbRef::new(&data);
///
/// assert!((rb.lin_interp(1.0) - 2.0).abs() <= f64::EPSILON);
/// assert!((rb.lin_interp(1.25) - 2.5).abs() <= f64::EPSILON);
/// assert!((rb.lin_interp(7.75) - 1.5).abs() <= f64::EPSILON);
/// assert!((rb.lin_interp(-0.5) - 3.0).abs() <= f64::EPSILON);
/// assert!((rb.lin_interp(-1.75) - 4.5).abs() <= f64::EPSILON);
/// ```
#[inline]
pub fn lin_interp(&self, index: f64) -> f64 {
lin_interp_f64(self, index)
}
}
impl<'a> BitMaskRbRefMut<'a, f32> {
/// Gets the linearly interpolated value between the two values
/// at `index.floor()` and `index.ceil()`, where `index`
/// is an `f32`.
///
/// # Example
///
/// ```
/// # use bit_mask_ring_buf::BitMaskRbRefMut;
/// let mut data: [f32; 4] = [0.0, 2.0, 4.0, 6.0];
/// let rb = BitMaskRbRefMut::new(&mut data);
///
/// assert!((rb.lin_interp(1.0) - 2.0).abs() <= f32::EPSILON);
/// assert!((rb.lin_interp(1.25) - 2.5).abs() <= f32::EPSILON);
/// assert!((rb.lin_interp(7.75) - 1.5).abs() <= f32::EPSILON);
/// assert!((rb.lin_interp(-0.5) - 3.0).abs() <= f32::EPSILON);
/// assert!((rb.lin_interp(-1.75) - 4.5).abs() <= f32::EPSILON);
/// ```
#[inline]
pub fn lin_interp(&self, index: f32) -> f32 {
lin_interp_f32(self, index)
}
}
impl<'a> BitMaskRbRefMut<'a, f64> {
/// Gets the linearly interpolated value between the two values
/// at `index.floor()` and `index.ceil()`, where `index`
/// is an `f64`.
///
/// # Example
///
/// ```
/// # use bit_mask_ring_buf::BitMaskRbRefMut;
/// let mut data: [f64; 4] = [0.0, 2.0, 4.0, 6.0];
/// let rb = BitMaskRbRefMut::new(&mut data);
///
/// assert!((rb.lin_interp(1.0) - 2.0).abs() <= f64::EPSILON);
/// assert!((rb.lin_interp(1.25) - 2.5).abs() <= f64::EPSILON);
/// assert!((rb.lin_interp(7.75) - 1.5).abs() <= f64::EPSILON);
/// assert!((rb.lin_interp(-0.5) - 3.0).abs() <= f64::EPSILON);
/// assert!((rb.lin_interp(-1.75) - 4.5).abs() <= f64::EPSILON);
/// ```
#[inline]
pub fn lin_interp(&self, index: f64) -> f64 {
lin_interp_f64(self, index)
}
}
#[inline]
fn lin_interp_f32<B: core::ops::Index<isize, Output = f32>>(buffer: &B, index: f32) -> f32 {
let index_floor = index.floor();
let fract = index - index_floor;
let index_isize = index_floor as isize;
let val_1 = buffer[index_isize];
let val_2 = buffer[index_isize + 1];
val_1 + ((val_2 - val_1) * fract)
}
#[inline]
fn lin_interp_f64<B: core::ops::Index<isize, Output = f64>>(buffer: &B, index: f64) -> f64 {
let index_floor = index.floor();
let fract = index - index_floor;
let index_isize = index_floor as isize;
let val_1 = buffer[index_isize];
let val_2 = buffer[index_isize + 1];
val_1 + ((val_2 - val_1) * fract)
}