From f957022442ceeb4690662d76fc7f69f78e14550b Mon Sep 17 00:00:00 2001
From: Michael Diamond <dimo414@gmail.com>
Date: Sat, 15 May 2021 12:00:11 -0700
Subject: [PATCH] Swap deprecated assign() calls for let();
 https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Conditional_and_Iterator_Functions#Assign_Statement

---
 involute_gears.scad | 4 ++--
 polyholes.scad      | 2 +-
 screw.scad          | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/involute_gears.scad b/involute_gears.scad
index a2866ab..3e6632e 100644
--- a/involute_gears.scad
+++ b/involute_gears.scad
@@ -266,13 +266,13 @@ module involute_bevel_gear_tooth (
 	{
 		for (i=[1:res])
 		{
-			assign (
+			let (
 				point1=
 					involute (base_radius*2,start_angle+(stop_angle - start_angle)*(i-1)/res),
 				point2=
 					involute (base_radius*2,start_angle+(stop_angle - start_angle)*(i)/res))
 			{
-				assign (
+				let (
 					side1_point1 = rotate_point (centre_angle, point1),
 					side1_point2 = rotate_point (centre_angle, point2),
 					side2_point1 = mirror_point (rotate_point (centre_angle, point1)),
diff --git a/polyholes.scad b/polyholes.scad
index 3e86a83..266b0ce 100644
--- a/polyholes.scad
+++ b/polyholes.scad
@@ -20,7 +20,7 @@ difference() {
             translate([(i * i + i)/2 + 3 * i , 8,-1])
                 polyhole(h = 5, d = i);
 
-            assign(d = i + 0.5)
+            let(d = i + 0.5)
                 translate([(d * d + d)/2 + 3 * d, 19,-1])
                     polyhole(h = 5, d = d);
         }
diff --git a/screw.scad b/screw.scad
index 737a1dc..2cea0b5 100644
--- a/screw.scad
+++ b/screw.scad
@@ -48,7 +48,7 @@ module ball_groove2(pitch, length, diameter, ball_radius, slices=200){
     offset = length/slices;
     union(){
         for (i = [0:slices]) {
-            assign (z = i*offset){
+            let (z = i*offset){
                 translate(helix_curve(pitch, radius, z)) sphere(ball_radius, $fa=5, $fs=1);
             }
         }