move

src/_impl/_catmull_rom_spline.scad

@@ -0,0 +1,12 @@
+use <bezier_curve.scad>;
+
+function _catmull_rom_spline_4pts(t_step, points, tightness) = 
+    let(
+        p1x_0tightness = (points[2] - points[0]) / 4 + points[1],
+        v_p1x = points[1] - p1x_0tightness,
+        p1x = p1x_0tightness + v_p1x * tightness,
+        p2x_0tightness = (points[1] - points[3]) / 4 + points[2],
+        v_p2x = points[2] - p2x_0tightness,
+        p2x = p2x_0tightness + v_p2x * tightness
+    )
+    bezier_curve(t_step, [points[1], p1x, p2x, points[2]]);

src/catmull_rom_spline.scad

@@ -1,15 +1,4 @@
-use <bezier_curve.scad>;
-
-function _catmull_rom_spline_4pts(t_step, points, tightness) = 
-    let(
-        p1x_0tightness = (points[2] - points[0]) / 4 + points[1],
-        v_p1x = points[1] - p1x_0tightness,
-        p1x = p1x_0tightness + v_p1x * tightness,
-        p2x_0tightness = (points[1] - points[3]) / 4 + points[2],
-        v_p2x = points[2] - p2x_0tightness,
-        p2x = p2x_0tightness + v_p2x * tightness
-    )
-    bezier_curve(t_step, [points[1], p1x, p2x, points[2]]);
+use <_impl/_catmull_rom_spline.scad>;
 
 function catmull_rom_spline(t_step, points, tightness = 0) = 
     let(leng = len(points))
@@ -25,7 +14,7 @@ function catmull_rom_spline(t_step, points, tightness = 0) =
     );
 
 /*
-use <experimental/catmull_rom_spline.scad>;
+use <catmull_rom_spline.scad>;
 use <hull_polyline3d.scad>;
 
 pts = [

src/experimental/note.md

@@ -4,7 +4,10 @@ to_do:
 
 next:
 
-- vx_contour
 - maze/*
+- vx_contour
 - polygon_hull
-- polyhedron_hull
+- polyhedron_hull
+- catmull_rom_spline
+- bauer_spiral
+- fibonacci_lattice