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Code Issues Releases Wiki Activity

user can define his own xs

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This commit is contained in:
Justin Lin
2020-03-05 20:23:17 +08:00
parent f1d864e44a
commit ae32838d1a
2 changed files with 9 additions and 7 deletions
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6
src/experimental/_impl/_pnoise1.scad
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@@ -1,10 +1,10 @@
function _pnoise1(x, n, slopes) = function _pnoise1(x, n, gradients) =
let( let(
lo = floor(x), lo = floor(x),
hi = (lo + 1) % n, hi = (lo + 1) % n,
dist = x - lo, dist = x - lo,
loPos = slopes[lo] * dist, loPos = gradients[lo] * dist,
hiPos = -slopes[hi] * (1 - dist), hiPos = -gradients[hi] * (1 - dist),
u = pow(dist, 3) * (dist * (dist * 6 - 15) + 10) u = pow(dist, 3) * (dist * (dist * 6 - 15) + 10)
) )
loPos * (1 - u) + hiPos * u; loPos * (1 - u) + hiPos * u;

10
src/experimental/pnoise1.scad
View File

@@ -1,11 +1,13 @@
use <experimental/_impl/_pnoise1.scad> ; use <experimental/_impl/_pnoise1.scad> ;
function pnoise1(from, to, step = 0.5) = function pnoise1(xs, gradients) =
let( let(
from = floor(min(xs)),
to = ceil(max(xs)),
n = to - from + 1, n = to - from + 1,
slopes = rands(-1, 1, n) grads = is_undef(gradients) ? rands(-1, 1, n) : gradients
) )
[ [
for(x = [0:step:n - 1]) for(x = xs)
[from + x, _pnoise1(x, n, slopes)] _pnoise1(x, n, grads)
]; ];