dotSCAD/docs/lib3x-nz_perlin2.md

nz_perlin2

Returns the 2D Perlin noise value at the (x, y) coordinate.

Since: 2.3

Parameters

• x : The x coordinate.
• y : The y coordinate.
• seed : The random seed.

Examples

use <util/rand.scad>;
use <hull_polyline2d.scad>;
use <surface/sf_thicken.scad>;
use <noise/nz_perlin2.scad>;
use <contours.scad>;

seed = rand(0, 255);
points = [
    for(y = [0:.1:10])
    [
        for(x = [0:.1:10])
        [x, y, nz_perlin2(x, y, seed)]
    ]
];

sf_thicken(points, .1);

translate([11, 0])
for(isoline = contours(points, 0)) {
    hull_polyline2d(isoline, width = .1);
}