mirror of
https://github.com/JustinSDK/dotSCAD.git
synced 2025-01-17 14:18:13 +01:00
38 lines
757 B
Markdown
38 lines
757 B
Markdown
# nz_perlin2
|
|
|
|
Returns the 2D [Perlin noise](https://en.wikipedia.org/wiki/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 <polyline_join.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)) {
|
|
polyline_join(isoline)
|
|
circle(.05);
|
|
}
|
|
|
|
 |