added twist_bottle

examples/twist_bottle.scad

@@ -0,0 +1,73 @@
+include <hollow_out.scad>;
+/* [Basic] */
+
+shape = "Flower";  // [Flower, Circle]
+model = "Outer"; // [Outer, Inner]
+width = 30;
+radius = 20;
+height = 100;
+thickness = 1;
+spacing = 0.65;
+twist = 180;
+
+/* [Advanced] */
+
+convexity = 10;
+slices = 200;
+   
+module twist_bottle(model, height, thickness, twist, spacing, convexity, slices) {
+    $fn = 96;
+    
+    module outer_container() {
+        translate([0, 0, thickness])
+            linear_extrude(height = height, twist = twist, convexity = convexity, slices = slices) 
+                hollow_out(thickness) children();
+                
+        linear_extrude(thickness) 
+            children();    
+    }
+    
+    module inner_container() {
+        linear_extrude(height = height, twist = twist, convexity = convexity, slices = slices) 
+            hollow_out(thickness) 
+                offset(r = -thickness - spacing) 
+                    children();                
+        
+        translate([0, 0, height]) 
+            rotate(twist) 
+                linear_extrude(thickness) 
+                    children();      
+    }
+    
+    if(model == "Outer") {
+        outer_container() 
+            children();
+    }
+    else {
+        translate([0, 0, height + thickness])
+            rotate([180, 0, 0]) 
+                inner_container() 
+                    children();
+    }
+} 
+
+if(shape == "Flower") {
+    twist_bottle(model, height, thickness, twist, spacing, convexity, slices) union() {
+        for(i = [0:3]) {
+            rotate(90 * i) 
+                translate([radius * 0.5, 0, 0]) 
+                    circle(radius * 0.5);
+        }
+    }  
+}
+
+if(shape == "Circle") {
+    twist_bottle(model, height, thickness, twist, spacing, convexity, slices) difference() {
+        circle(radius);
+        for(a = [0:120:240]) {
+            rotate(a) 
+                translate([radius, 0, 0]) 
+                    circle(radius / 4);
+        }
+    }
+}