Merge branch 'martinbudden-rectangular_tube'

readme.md

@@ -5970,6 +5970,7 @@ Simple tube or ring
 ### Modules
 | Module | Description |
 |:--- |:--- |
+| `rectangular_tube(size, center = true, thickness = 1, fillet = 0.5)` | Create a retangular tube with filleted corners |
 | `ring(or, ir)` | Create a ring with specified external and internal radii |
 | `tube(or, ir, h, center = true)` | Create a tube with specified external and internal radii and height `h` |
 | `woven_tube(or, ir, h, center= true, colour = grey(30)` | Create a woven tube with specified external and internal radii, height `h`, colours, warp and weft |

tests/tube.scad

@@ -27,6 +27,9 @@ module tubes() {
 
     translate([50, 10])
         tube(10, 8, 30);
+
+    translate([100, 10])
+        rectangular_tube([10, 20, 30]);
 }
 
 tubes();

utils/tube.scad

@@ -68,3 +68,11 @@ module woven_tube(or, ir, h, center= true, colour = grey(30), colour2, warp = 2,
         }
     }
 }
+
+module rectangular_tube(size, center = true, thickness = 1, fillet = 0.5) { //! Create a retangular tube with filleted corners
+    extrude_if(size.z, center = center)
+        difference() {
+            rounded_square([size.x, size.y], fillet);
+            rounded_square([size.x - 2 * thickness, size.y - 2 * thickness], fillet);
+        }
+}