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noise as alpha

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Justin Lin
2020-03-09 08:58:30 +08:00
parent ee125eafd6
commit 56d169e677
1 changed files with 9 additions and 10 deletions
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15
src/experimental/demo/pnoise3_demo.scad
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@@ -1,6 +1,6 @@
use <util/rand.scad>; use <util/rand.scad>;
use <experimental/pnoise2.scad>; use <experimental/pnoise2s.scad>;
use <experimental/pnoise3.scad>; use <experimental/pnoise3s.scad>;
module demo1() { module demo1() {
for(z = [0:.2:5]) { for(z = [0:.2:5]) {
@@ -9,15 +9,14 @@ module demo1() {
for(x = [0:.2:5]) for(x = [0:.2:5])
[x, y, z] [x, y, z]
]; ];
noise = pnoise3(points, 3); noise = pnoise3s(points, 3);
for(i = [0:len(points) - 1]) { for(i = [0:len(points) - 1]) {
if(noise[i] > 0) { alpha = abs(noise[i] + .5);
color([noise[i], .75, .75]) color([.75, .75, .75, alpha < 0 ? 0 : alpha > 1 ? 1 : alpha])
translate(points[i]) translate(points[i])
cube(.2); cube(.2);
} }
} }
}
} }
module demo2() { module demo2() {
@@ -33,7 +32,7 @@ module demo2() {
points_with_h = [ points_with_h = [
for(ri = [0:len(points) - 1]) for(ri = [0:len(points) - 1])
let(ns = pnoise2(points[ri], seed)) let(ns = pnoise2s(points[ri], seed))
[ [
for(ci = [0:len(ns) - 1]) for(ci = [0:len(ns) - 1])
[points[ri][ci][0], points[ri][ci][1], ns[ci] + 1] [points[ri][ci][0], points[ri][ci][1], ns[ci] + 1]
@@ -47,7 +46,7 @@ module demo2() {
pts = [ pts = [
for(z = [0:.2:p[2] * h_scale]) [p[0], p[1], z] for(z = [0:.2:p[2] * h_scale]) [p[0], p[1], z]
]; ];
noise = pnoise3(pts, seed); noise = pnoise3s(pts, seed);
for(j = [0:len(pts) - 1]) { for(j = [0:len(pts) - 1]) {
if(noise[j] > 0) { if(noise[j] > 0) {
color( color(