From 29594b8688867650c32ffb70cf0e03089e79631c Mon Sep 17 00:00:00 2001
From: Justin Lin <justin.sdk@gmail.com>
Date: Sat, 27 Aug 2022 15:26:59 +0800
Subject: [PATCH] use  sf_cylinder if angle is 360

---
 src/surface/sf_bend.scad | 46 +++++++++++++++++++++++-----------------
 1 file changed, 26 insertions(+), 20 deletions(-)

diff --git a/src/surface/sf_bend.scad b/src/surface/sf_bend.scad
index d696e515..010bf24a 100644
--- a/src/surface/sf_bend.scad
+++ b/src/surface/sf_bend.scad
@@ -9,31 +9,37 @@
 **/ 
 
 use <_impl/_sf_square_surfaces.scad>
+use <sf_cylinder.scad>;
 use <sf_solidify.scad>
 use <../ptf/ptf_bend.scad>
 
 module sf_bend(levels, radius, thickness, depth, angle = 180, invert = false, convexity = 1) {
-    dp = is_undef(depth) ? thickness / 2 : depth;
-    surface = _sf_square_surfaces(levels, thickness, dp, invert);
-    rows = len(levels);
-    columns = len(levels[0]);
-    size = [columns - 1, rows - 1];
+    if(angle == 360) {
+        sf_cylinder(levels, radius, thickness, depth, invert, convexity);
+    }
+    else {
+        dp = is_undef(depth) ? thickness / 2 : depth;
+        surface = _sf_square_surfaces(levels, thickness, dp, invert);
+        rows = len(levels);
+        columns = len(levels[0]);
+        size = [columns - 1, rows - 1];
 
-    offset_z = invert ? thickness : 0;
-    r = radius + offset_z;
-    sf_solidify(
-        [
-            for(row = surface[0]) 
+        offset_z = invert ? thickness : 0;
+        r = radius + offset_z;
+        sf_solidify(
             [
-                for(p = row) ptf_bend(size, p, r, angle)
-            ]
-        ],
-        [
-            for(row = surface[1]) 
+                for(row = surface[0]) 
+                [
+                    for(p = row) ptf_bend(size, p, r, angle)
+                ]
+            ],
             [
-                for(p = row) ptf_bend(size, p, radius, angle)
-            ]
-        ],
-        convexity = convexity
-    );
+                for(row = surface[1]) 
+                [
+                    for(p = row) ptf_bend(size, p, radius, angle)
+                ]
+            ],
+            convexity = convexity
+        );
+    }
 }
\ No newline at end of file