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38 lines
762 B
Markdown
38 lines
762 B
Markdown
# nz_perlin2
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Returns the 2D [Perlin noise](https://en.wikipedia.org/wiki/Perlin_noise) value at the (x, y) coordinate.
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**Since:** 2.3
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## Parameters
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- `x` : The x coordinate.
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- `y` : The y coordinate.
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- `seed` : The random seed.
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## Examples
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use <util/rand.scad>;
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use <polyline_join.scad>;
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use <surface/sf_thicken.scad>;
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use <noise/nz_perlin2.scad>;
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use <contours.scad>;
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seed = rand(0, 255);
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points = [
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for(y = [0:.1:10])
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[
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for(x = [0:.1:10])
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[x, y, nz_perlin2(x, y, seed)]
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]
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];
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sf_thicken(points, .1);
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translate([11, 0])
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for(isoline = contours(points, 0)) {
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polyline_join(isoline)
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circle(.05);
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}
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