ND-Interpolate-rs

1-10维插值在Rust中实现。它支持f64和f32数据类型进行插值，并提供线性与三次样条插值，最多支持10维。

此库特别适用于Perlin Noise应用。

示例

以下是一个使用3D三次插值制作球体大理石纹理的示例

use nd_interpolate::*;
use image::*; // image = "0.23.14"
use rand::prelude::*; // rand = "0.8.4"
use std::f64::consts::PI;

fn sphere_marble_texture_example() {
	println!("Making marbled sphere texture...");
	let imgsize = 512; let w = 2*imgsize; let h = imgsize;
	let gridsize = 16; let gridcenter = gridsize / 2;
	let radius = (gridsize / 2 - 3) as f64;
	let mut img: RgbImage = ImageBuffer::new(w, h);
	let mut rand_grid = vec![vec![vec![0f64;gridsize];gridsize];gridsize];
	for x in 0..rand_grid.len(){ for y in 0..rand_grid[x].len(){ for z in 0..rand_grid[x][y].len() {
		let r: f64 = random();
		rand_grid[x][y][z] = r;
	} } }
	for py in 0..h { for px in 0..w {
		let lon = (px as f64 / w as f64) * (2.0*PI) - PI;
		let lat = ((h-py) as f64 / h as f64) * PI - 0.5*PI;
		let coord = [
			radius * lon.sin() * lat.cos(), // X
			radius * lat.sin(), // Y
			radius * lon.cos() * lat.cos(), // Z
		];
		let grid_coord: [usize; 3] = [
			(coord[0].floor() as i32 + gridcenter as i32) as usize,
			(coord[1].floor() as i32 + gridcenter as i32) as usize,
			(coord[2].floor() as i32 + gridcenter as i32) as usize
		];
		let mut local_4x4x4 = [[[0f64;4];4];4];
		for ix in 0..4{for iy in 0..4{for iz in 0..4{
			let gx = grid_coord[0];
			let gy = grid_coord[1];
			let gz = grid_coord[2];
			local_4x4x4[ix][iy][iz] = rand_grid[ix+gx-1][iy+gy-1][iz+gz-1];
		}}}
		let v = ((cubic_3D_grid(coord, &local_4x4x4)) * 255f64) as u8;
		let pixel = Rgb([v,v,v]);
		img.put_pixel(px, py, pixel);
	} }
	img.save("marbled_sphere_texture.png").unwrap();
	println!("...Done!");
}

上述代码生成了以下图像：

备注

此Rust库基于我的Java噪声库插值器