noise_functions/base/
cell_value.rsuse crate::base::{impl_noise, CustomCellValue};
#[cfg(feature = "nightly-simd")]
use core::simd::{f32x2, f32x4};
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct CellValue {
pub jitter: f32,
}
impl CellValue {
pub const fn jitter(mut self, jitter: f32) -> Self {
self.jitter = jitter;
self
}
}
impl_noise!(234 CellValue);
impl Default for CellValue {
fn default() -> Self {
Self { jitter: 1.0 }
}
}
impl CellValue {
#[inline]
fn gen2(self, [x, y]: [f32; 2], seed: i32) -> f32 {
use crate::from_fast_noise_lite::{cell_neighbours, hash2, round_to_int, JITTER_2D, PRIME_X, PRIME_Y, RAND_VECS_2D};
let jitter = self.jitter * JITTER_2D;
let xr: i32 = round_to_int(x);
let yr: i32 = round_to_int(y);
let mut distance0: f32 = 1e10;
let mut closest_hash: i32 = 0;
let mut x_primed: i32 = xr.wrapping_sub(1).wrapping_mul(PRIME_X);
let y_primed_base: i32 = yr.wrapping_sub(1).wrapping_mul(PRIME_Y);
for xi in cell_neighbours(xr) {
let mut y_primed: i32 = y_primed_base;
for yi in cell_neighbours(yr) {
let hash: i32 = hash2(seed, x_primed, y_primed);
let [rand_x, rand_y] = *RAND_VECS_2D[hash].as_array();
let vec_x: f32 = (xi as f32 - x) + rand_x * jitter;
let vec_y: f32 = (yi as f32 - y) + rand_y * jitter;
let new_distance: f32 = vec_x * vec_x + vec_y * vec_y;
if new_distance < distance0 {
distance0 = new_distance;
closest_hash = hash;
}
y_primed = y_primed.wrapping_add(PRIME_Y);
}
x_primed = x_primed.wrapping_add(PRIME_X);
}
closest_hash as f32 * (1.0 / 2147483648.0)
}
#[inline]
fn gen3(self, [x, y, z]: [f32; 3], seed: i32) -> f32 {
use crate::from_fast_noise_lite::{cell_neighbours, hash3, round_to_int, JITTER_3D, PRIME_X, PRIME_Y, PRIME_Z, RAND_VECS_3D};
let jitter = self.jitter * JITTER_3D;
let xr: i32 = round_to_int(x);
let yr: i32 = round_to_int(y);
let zr: i32 = round_to_int(z);
let mut distance0: f32 = 1e10;
let mut closest_hash: i32 = 0;
let mut x_primed: i32 = xr.wrapping_sub(1).wrapping_mul(PRIME_X);
let y_primed_base: i32 = yr.wrapping_sub(1).wrapping_mul(PRIME_Y);
let z_primed_base: i32 = zr.wrapping_sub(1).wrapping_mul(PRIME_Z);
for xi in cell_neighbours(xr) {
let mut y_primed: i32 = y_primed_base;
for yi in cell_neighbours(yr) {
let mut z_primed: i32 = z_primed_base;
for zi in cell_neighbours(zr) {
let hash: i32 = hash3(seed, x_primed, y_primed, z_primed);
let [rand_x, rand_y, rand_z, _] = *RAND_VECS_3D[hash].as_array();
let vec_x: f32 = (xi as f32 - x) + rand_x * jitter;
let vec_y: f32 = (yi as f32 - y) + rand_y * jitter;
let vec_z: f32 = (zi as f32 - z) + rand_z * jitter;
let new_distance: f32 = vec_x * vec_x + vec_y * vec_y + vec_z * vec_z;
if new_distance < distance0 {
distance0 = new_distance;
closest_hash = hash;
}
z_primed = z_primed.wrapping_add(PRIME_Z);
}
y_primed = y_primed.wrapping_add(PRIME_Y);
}
x_primed = x_primed.wrapping_add(PRIME_X);
}
closest_hash as f32 * (1.0 / 2147483648.0)
}
#[inline]
fn gen4(self, point: [f32; 4], seed: i32) -> f32 {
CustomCellValue::default().jitter(self.jitter).gen4(point, seed)
}
#[inline]
#[cfg(feature = "nightly-simd")]
fn gen2a(self, point: f32x2, seed: i32) -> f32 {
use crate::from_fast_noise_lite::{cell_neighbours, hash2, length_squared, round_to_int, splat, JITTER_2D, PRIME_X, PRIME_Y, RAND_VECS_2D};
let jitter = self.jitter * JITTER_2D;
let rounded = round_to_int(point);
let mut distance: f32 = 1e10;
let mut closest_hash: i32 = 0;
let mut x_primed = rounded[0].wrapping_sub(1).wrapping_mul(PRIME_X);
let y_primed_base = rounded[1].wrapping_sub(1).wrapping_mul(PRIME_Y);
for xi in cell_neighbours(rounded[0]) {
let mut y_primed = y_primed_base;
for yi in cell_neighbours(rounded[1]) {
let hash = hash2(seed, x_primed, y_primed);
let rand = RAND_VECS_2D[hash].0;
let coor = f32x2::from_array([xi as f32, yi as f32]);
let vec = (coor - point) + rand * splat(jitter);
let new_distance = length_squared(vec);
if new_distance < distance {
distance = new_distance;
closest_hash = hash;
}
y_primed = y_primed.wrapping_add(PRIME_Y);
}
x_primed = x_primed.wrapping_add(PRIME_X);
}
closest_hash as f32 * (1.0 / 2147483648.0)
}
#[inline]
#[cfg(feature = "nightly-simd")]
fn gen3a(self, point: f32x4, seed: i32) -> f32 {
use crate::from_fast_noise_lite::{cell_neighbours, hash3, length_squared, round_to_int, splat, JITTER_3D, PRIME_X, PRIME_Y, PRIME_Z, RAND_VECS_3D};
let jitter = self.jitter * JITTER_3D;
let rounded = round_to_int(point);
let mut distance: f32 = 1e10;
let mut closest_hash: i32 = 0;
let mut x_primed = rounded[0].wrapping_sub(1).wrapping_mul(PRIME_X);
let y_primed_base = rounded[1].wrapping_sub(1).wrapping_mul(PRIME_Y);
let z_primed_base = rounded[2].wrapping_sub(1).wrapping_mul(PRIME_Z);
for xi in cell_neighbours(rounded[0]) {
let mut y_primed = y_primed_base;
for yi in cell_neighbours(rounded[1]) {
let mut z_primed = z_primed_base;
for zi in cell_neighbours(rounded[2]) {
let hash = hash3(seed, x_primed, y_primed, z_primed);
let rand = RAND_VECS_3D[hash].0;
let coor = f32x4::from_array([xi as f32, yi as f32, zi as f32, zi as f32]);
let vec = (coor - point) + rand * splat(jitter);
let new_distance = length_squared(vec);
if new_distance < distance {
distance = new_distance;
closest_hash = hash;
}
z_primed = z_primed.wrapping_add(PRIME_Z);
}
y_primed = y_primed.wrapping_add(PRIME_Y);
}
x_primed = x_primed.wrapping_add(PRIME_X);
}
closest_hash as f32 * (1.0 / 2147483648.0)
}
#[inline]
#[cfg(feature = "nightly-simd")]
fn gen4a(self, point: f32x4, seed: i32) -> f32 {
CustomCellValue::default().jitter(self.jitter).gen4a(point, seed)
}
}