add ripples

examples/voronoi/ripples.scad

@@ -0,0 +1,38 @@
+use <noise/nz_worley2.scad>;
+use <noise/nz_perlin3.scad>;
+use <surface/sf_thicken.scad>;
+
+size = [100, 100];
+grid_w = 5;
+detail = 5;
+thickness = 0.5;
+dist = "euclidean"; // [euclidean, manhattan, chebyshev, border] 
+seed = 51;
+
+ripples();
+
+module ripples() {
+	points = [
+		for(y = [0:size.y - 1]) 
+			for(x = [0:size.x - 1]) 
+				[x, y]
+	];
+
+	cells = [for(p = points) nz_worley2(p.x / detail, p.y / detail, seed, grid_w, dist)];
+
+	detail2 = detail / 2 * 10;
+	nz2 = [
+		for(y = [0:size.y - 1]) 
+			[for(x = [0:size.x - 1]) 
+				let(
+					i = size.x * y + x,
+					p = points[i],
+					n = 2.5 * (nz_perlin3(cells[i][2], p.x / detail2, p.y / detail2, 1) + 1)
+				)
+				[p.x, p.y, n]
+			]
+	];
+
+
+	sf_thicken(nz2, thickness);
+}