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Add mix, mix_scalar, mix_vec, lerp, lerp_scalar, lerp_vec.

This commit is contained in:
sebcrozet 2018-10-21 22:11:41 +02:00 committed by Sébastien Crozet
parent b9ca074740
commit 71cc075f35
1 changed files with 203 additions and 34 deletions
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235
nalgebra-glm/src/common.rs
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@ -1,9 +1,9 @@
use std::mem;
use na::{self, DefaultAllocator, Real};
use num::FromPrimitive;
use na::{self, Real, DefaultAllocator};
use std::mem;
use aliases::{TVec, TMat};
use traits::{Number, Dimension, Alloc};
use aliases::{TMat, TVec};
use traits::{Alloc, Dimension, Number};
/// For each matrix or vector component `x` if `x >= 0`; otherwise, it returns `-x`.
///
@ -22,7 +22,9 @@ use traits::{Number, Dimension, Alloc};
///
/// * [`sign`](fn.sign.html)
pub fn abs<N: Number, R: Dimension, C: Dimension>(x: &TMat<N, R, C>) -> TMat<N, R, C>
where DefaultAllocator: Alloc<N, R, C> {
where
DefaultAllocator: Alloc<N, R, C>,
{
x.abs()
}
@ -44,7 +46,9 @@ pub fn abs<N: Number, R: Dimension, C: Dimension>(x: &TMat<N, R, C>) -> TMat<N,
/// * [`round`](fn.round.html)
/// * [`trunc`](fn.trunc.html)
pub fn ceil<N: Real, D: Dimension>(x: &TVec<N, D>) -> TVec<N, D>
where DefaultAllocator: Alloc<N, D> {
where
DefaultAllocator: Alloc<N, D>,
{
x.map(|x| x.ceil())
}
@ -94,7 +98,9 @@ pub fn clamp_scalar<N: Number>(x: N, min_val: N, max_val: N) -> N {
/// * [`clamp_scalar`](fn.clamp_scalar.html)
/// * [`clamp_vec`](fn.clamp_vec.html)
pub fn clamp<N: Number, D: Dimension>(x: &TVec<N, D>, min_val: N, max_val: N) -> TVec<N, D>
where DefaultAllocator: Alloc<N, D> {
where
DefaultAllocator: Alloc<N, D>,
{
x.map(|x| na::clamp(x, min_val, max_val))
}
@ -125,8 +131,14 @@ pub fn clamp<N: Number, D: Dimension>(x: &TVec<N, D>, min_val: N, max_val: N) ->
///
/// * [`clamp_scalar`](fn.clamp_scalar.html)
/// * [`clamp`](fn.clamp.html)
pub fn clamp_vec<N: Number, D: Dimension>(x: &TVec<N, D>, min_val: &TVec<N, D>, max_val: &TVec<N, D>) -> TVec<N, D>
where DefaultAllocator: Alloc<N, D> {
pub fn clamp_vec<N: Number, D: Dimension>(
x: &TVec<N, D>,
min_val: &TVec<N, D>,
max_val: &TVec<N, D>,
) -> TVec<N, D>
where
DefaultAllocator: Alloc<N, D>,
{
x.zip_zip_map(min_val, max_val, |a, min, max| na::clamp(a, min, max))
}
@ -161,7 +173,9 @@ pub fn float_bits_to_int(v: f32) -> i32 {
/// * [`uint_bits_to_float`](fn.uint_bits_to_float.html)
/// * [`uint_bits_to_float_scalar`](fn.uint_bits_to_float_scalar.html)
pub fn float_bits_to_int_vec<D: Dimension>(v: &TVec<f32, D>) -> TVec<i32, D>
where DefaultAllocator: Alloc<f32, D> {
where
DefaultAllocator: Alloc<f32, D>,
{
v.map(float_bits_to_int)
}
@ -196,7 +210,9 @@ pub fn float_bits_to_uint(v: f32) -> u32 {
/// * [`uint_bits_to_float`](fn.uint_bits_to_float.html)
/// * [`uint_bits_to_float_scalar`](fn.uint_bits_to_float_scalar.html)
pub fn float_bits_to_uint_vec<D: Dimension>(v: &TVec<f32, D>) -> TVec<u32, D>
where DefaultAllocator: Alloc<f32, D> {
where
DefaultAllocator: Alloc<f32, D>,
{
v.map(float_bits_to_uint)
}
@ -217,7 +233,9 @@ pub fn float_bits_to_uint_vec<D: Dimension>(v: &TVec<f32, D>) -> TVec<u32, D>
/// * [`round`](fn.round.html)
/// * [`trunc`](fn.trunc.html)
pub fn floor<N: Real, D: Dimension>(x: &TVec<N, D>) -> TVec<N, D>
where DefaultAllocator: Alloc<N, D> {
where
DefaultAllocator: Alloc<N, D>,
{
x.map(|x| x.floor())
}
@ -244,7 +262,9 @@ pub fn floor<N: Real, D: Dimension>(x: &TVec<N, D>) -> TVec<N, D>
/// * [`round`](fn.round.html)
/// * [`trunc`](fn.trunc.html)
pub fn fract<N: Real, D: Dimension>(x: &TVec<N, D>) -> TVec<N, D>
where DefaultAllocator: Alloc<N, D> {
where
DefaultAllocator: Alloc<N, D>,
{
x.map(|x| x.fract())
}
@ -271,7 +291,6 @@ pub fn fract<N: Real, D: Dimension>(x: &TVec<N, D>) -> TVec<N, D>
/// * [`uint_bits_to_float_scalar`](fn.uint_bits_to_float_scalar.html)
pub fn int_bits_to_float(v: i32) -> f32 {
f32::from_bits(v as u32)
}
/// For each components of `v`, returns a floating-point value corresponding to a signed integer encoding of a floating-point value.
@ -288,7 +307,9 @@ pub fn int_bits_to_float(v: i32) -> f32 {
/// * [`uint_bits_to_float`](fn.uint_bits_to_float.html)
/// * [`uint_bits_to_float_scalar`](fn.uint_bits_to_float_scalar.html)
pub fn int_bits_to_float_vec<D: Dimension>(v: &TVec<i32, D>) -> TVec<f32, D>
where DefaultAllocator: Alloc<f32, D> {
where
DefaultAllocator: Alloc<f32, D>,
{
v.map(int_bits_to_float)
}
@ -310,13 +331,155 @@ pub fn int_bits_to_float_vec<D: Dimension>(v: &TVec<i32, D>) -> TVec<f32, D>
// x * (exp).exp2()
//}
/// Returns `x * (1.0 - a) + y * a`, i.e., the linear blend of x and y using the floating-point value a.
/// Returns `x * (1.0 - a) + y * a`, i.e., the linear blend of the scalars x and y using the scalar value a.
///
/// The value for a is not restricted to the range `[0, 1]`.
pub fn mix<N: Number>(x: N, y: N, a: N) -> N {
///
/// # Examples:
///
/// ```
/// # use nalgebra_glm as glm;
/// assert_eq!(glm::mix_scalar(2.0, 20.0, 0.1), 3.8);
/// ```
///
/// # See also:
///
/// * [`mix`](fn.mix.html)
/// * [`mix_vec`](fn.mix_vec.html)
pub fn mix_scalar<N: Number>(x: N, y: N, a: N) -> N {
x * (N::one() - a) + y * a
}
/// Returns `x * (1.0 - a) + y * a`, i.e., the linear blend of the vectors x and y using the scalar value a.
///
/// The value for a is not restricted to the range `[0, 1]`.
///
/// # Examples:
///
/// ```
/// # use nalgebra_glm as glm;
/// let x = glm::vec3(1.0, 2.0, 3.0);
/// let y = glm::vec3(10.0, 20.0, 30.0);
/// assert_eq!(glm::mix(&x, &y, 0.1), glm::vec3(1.9, 3.8, 5.7));
/// ```
///
/// # See also:
///
/// * [`mix_scalar`](fn.mix_scalar.html)
/// * [`mix_vec`](fn.mix_vec.html)
pub fn mix<N: Number, D: Dimension>(x: &TVec<N, D>, y: &TVec<N, D>, a: N) -> TVec<N, D>
where
DefaultAllocator: Alloc<N, D>,
{
x * (N::one() - a) + y * a
}
/// Returns `x * (1.0 - a) + y * a`, i.e., the component-wise linear blend of `x` and `y` using the components of
/// the vector `a` as coefficients.
///
/// The value for a is not restricted to the range `[0, 1]`.
///
/// # Examples:
///
/// ```
/// # use nalgebra_glm as glm;
/// let x = glm::vec3(1.0, 2.0, 3.0);
/// let y = glm::vec3(10.0, 20.0, 30.0);
/// let a = glm::vec3(0.1, 0.2, 0.3);
/// assert_eq!(glm::mix_vec(&x, &y, &a), glm::vec3(1.9, 5.6, 11.1));
/// ```
///
/// # See also:
///
/// * [`mix_scalar`](fn.mix_scalar.html)
/// * [`mix`](fn.mix.html)
pub fn mix_vec<N: Number, D: Dimension>(
x: &TVec<N, D>,
y: &TVec<N, D>,
a: &TVec<N, D>,
) -> TVec<N, D>
where
DefaultAllocator: Alloc<N, D>,
{
x.component_mul(&(TVec::<N, D>::repeat(N::one()) - a)) + y.component_mul(&a)
}
/// Returns `x * (1.0 - a) + y * a`, i.e., the linear blend of the scalars x and y using the scalar value a.
///
/// The value for a is not restricted to the range `[0, 1]`.
/// This is an alias for `mix_scalar`.
///
/// # Examples:
///
/// ```
/// # use nalgebra_glm as glm;
/// assert_eq!(glm::lerp_scalar(2.0, 20.0, 0.1), 3.8);
/// ```
///
/// # See also:
///
/// * [`lerp`](fn.lerp.html)
/// * [`lerp_vec`](fn.lerp_vec.html)
pub fn lerp_scalar<N: Number>(x: N, y: N, a: N) -> N {
mix_scalar(x, y, a)
}
/// Returns `x * (1.0 - a) + y * a`, i.e., the linear blend of the vectors x and y using the scalar value a.
///
/// The value for a is not restricted to the range `[0, 1]`.
/// This is an alias for `mix`.
///
/// # Examples:
///
/// ```
/// # use nalgebra_glm as glm;
/// let x = glm::vec3(1.0, 2.0, 3.0);
/// let y = glm::vec3(10.0, 20.0, 30.0);
/// assert_eq!(glm::lerp(&x, &y, 0.1), glm::vec3(1.9, 3.8, 5.7));
/// ```
///
/// # See also:
///
/// * [`lerp_scalar`](fn.lerp_scalar.html)
/// * [`lerp_vec`](fn.lerp_vec.html)
pub fn lerp<N: Number, D: Dimension>(x: &TVec<N, D>, y: &TVec<N, D>, a: N) -> TVec<N, D>
where
DefaultAllocator: Alloc<N, D>,
{
mix(x, y, a)
}
/// Returns `x * (1.0 - a) + y * a`, i.e., the component-wise linear blend of `x` and `y` using the components of
/// the vector `a` as coefficients.
///
/// The value for a is not restricted to the range `[0, 1]`.
/// This is an alias for `mix_vec`.
///
/// # Examples:
///
/// ```
/// # use nalgebra_glm as glm;
/// let x = glm::vec3(1.0, 2.0, 3.0);
/// let y = glm::vec3(10.0, 20.0, 30.0);
/// let a = glm::vec3(0.1, 0.2, 0.3);
/// assert_eq!(glm::lerp_vec(&x, &y, &a), glm::vec3(1.9, 5.6, 11.1));
/// ```
///
/// # See also:
///
/// * [`lerp_scalar`](fn.lerp_scalar.html)
/// * [`lerp`](fn.lerp.html)
pub fn lerp_vec<N: Number, D: Dimension>(
x: &TVec<N, D>,
y: &TVec<N, D>,
a: &TVec<N, D>,
) -> TVec<N, D>
where
DefaultAllocator: Alloc<N, D>,
{
mix_vec(x, y, a)
}
/// Component-wise modulus.
///
/// Returns `x - y * floor(x / y)` for each component in `x` using the corresponding component of `y`.
@ -325,7 +488,9 @@ pub fn mix<N: Number>(x: N, y: N, a: N) -> N {
///
/// * [`modf`](fn.modf.html)
pub fn modf_vec<N: Number, D: Dimension>(x: &TVec<N, D>, y: &TVec<N, D>) -> TVec<N, D>
where DefaultAllocator: Alloc<N, D> {
where
DefaultAllocator: Alloc<N, D>,
{
x.zip_map(y, |x, y| x % y)
}
@ -357,9 +522,10 @@ pub fn modf<N: Number>(x: N, i: N) -> N {
/// * [`fract`](fn.fract.html)
/// * [`trunc`](fn.trunc.html)
pub fn round<N: Real, D: Dimension>(x: &TVec<N, D>) -> TVec<N, D>
where DefaultAllocator: Alloc<N, D> {
where
DefaultAllocator: Alloc<N, D>,
{
x.map(|x| x.round())
}
//pub fn roundEven<N: Scalar, D: Dimension>(x: &TVec<N, D>) -> TVec<N, D>
@ -382,14 +548,10 @@ pub fn round<N: Real, D: Dimension>(x: &TVec<N, D>) -> TVec<N, D>
/// * [`abs`](fn.abs.html)
///
pub fn sign<N: Number, D: Dimension>(x: &TVec<N, D>) -> TVec<N, D>
where DefaultAllocator: Alloc<N, D> {
x.map(|x| {
if x.is_zero() {
N::zero()
} else {
x.signum()
}
})
where
DefaultAllocator: Alloc<N, D>,
{
x.map(|x| if x.is_zero() { N::zero() } else { x.signum() })
}
/// Returns 0.0 if `x <= edge0` and `1.0 if x >= edge1` and performs smooth Hermite interpolation between 0 and 1 when `edge0 < x < edge1`.
@ -414,13 +576,17 @@ pub fn step_scalar<N: Number>(edge: N, x: N) -> N {
/// Returns 0.0 if `x[i] < edge`, otherwise it returns 1.0.
pub fn step<N: Number, D: Dimension>(edge: N, x: &TVec<N, D>) -> TVec<N, D>
where DefaultAllocator: Alloc<N, D> {
where
DefaultAllocator: Alloc<N, D>,
{
x.map(|x| step_scalar(edge, x))
}
/// Returns 0.0 if `x[i] < edge[i]`, otherwise it returns 1.0.
pub fn step_vec<N: Number, D: Dimension>(edge: &TVec<N, D>, x: &TVec<N, D>) -> TVec<N, D>
where DefaultAllocator: Alloc<N, D> {
where
DefaultAllocator: Alloc<N, D>,
{
edge.zip_map(x, step_scalar)
}
@ -441,7 +607,9 @@ pub fn step_vec<N: Number, D: Dimension>(edge: &TVec<N, D>, x: &TVec<N, D>) -> T
/// * [`fract`](fn.fract.html)
/// * [`round`](fn.round.html)
pub fn trunc<N: Real, D: Dimension>(x: &TVec<N, D>) -> TVec<N, D>
where DefaultAllocator: Alloc<N, D> {
where
DefaultAllocator: Alloc<N, D>,
{
x.map(|x| x.trunc())
}
@ -460,7 +628,6 @@ pub fn trunc<N: Real, D: Dimension>(x: &TVec<N, D>) -> TVec<N, D>
/// * [`uint_bits_to_float`](fn.uint_bits_to_float.html)
pub fn uint_bits_to_float_scalar(v: u32) -> f32 {
f32::from_bits(v)
}
/// For each component of `v`, returns a floating-point value corresponding to a unsigned integer encoding of a floating-point value.
@ -477,6 +644,8 @@ pub fn uint_bits_to_float_scalar(v: u32) -> f32 {
/// * [`int_bits_to_float_vec`](fn.int_bits_to_float_vec.html)
/// * [`uint_bits_to_float_scalar`](fn.uint_bits_to_float_scalar.html)
pub fn uint_bits_to_float<D: Dimension>(v: &TVec<u32, D>) -> TVec<f32, D>
where DefaultAllocator: Alloc<f32, D> {
where
DefaultAllocator: Alloc<f32, D>,
{
v.map(uint_bits_to_float_scalar)
}