add fidget_skull

examples/spiral_polygons/fidget_skull.scad

@@ -0,0 +1,146 @@
+use <rounded_square.scad>
+
+beginning_radius = 5;
+fn = 6;
+number_of_polygons = 6;
+height = 15;
+thickness = 1;
+spacing = 1;
+slope = 0.65;
+base_height = height * 1.75;
+
+rotate(90)
+    fidget_skull(beginning_radius, fn, number_of_polygons, height, thickness, spacing, slope, base_height);
+
+module fidget_skull(beginning_radius, fn, number_of_polygons, height, thickness, spacing, slope, base_height) {
+    
+    skull_scale = .925;
+
+    n = number_of_polygons + 1;
+    theta = 180 / fn;
+
+	y = beginning_radius - beginning_radius * cos(theta);
+	dr = y / cos(theta) + thickness + spacing;
+
+	module drawPolygon(r) {
+        rotate(180)
+		circle(r, $fn = fn);
+	}
+	
+	rs = [for(i = [0: n + 1]) beginning_radius + i * dr];
+	
+	half_height = height / 2;
+
+	s = [for(i = [1: n + 1]) (rs[i] + slope * half_height) / rs[i]];
+
+	module half() {
+	    translate([0, 0, -half_height]) {
+            //translate([0, 0, -half_height / 2])
+			linear_extrude(half_height, scale = s[0])
+			difference() {
+				drawPolygon(beginning_radius);
+				drawPolygon(beginning_radius - thickness);
+			}
+			//rotate(-(n) * 5)
+			for(i = [1:n - 1]) {
+				linear_extrude(half_height, scale = s[i])
+              //  rotate(i * 5)
+				difference() {
+					drawPolygon(rs[i]);
+					drawPolygon(rs[i] - thickness);
+				}					
+			}
+		}
+	}
+	
+    translate([0, rs[len(rs) - 1]] * 1.1) {
+        half();	
+        mirror([0, 0, 1])
+            half();
+    }
+    translate([0, -rs[len(rs) - 1]]  * 1.1) {
+        half();	
+        mirror([0, 0, 1])
+            half();
+    }
+
+
+    // scope
+	module eye_scope() {
+        scale(s[n - 1])
+        difference() {
+            drawPolygon(rs[n - 1]);
+            drawPolygon(rs[n - 1] - thickness);
+        }					
+	}
+
+    module teeth_scope() {
+        translate([-rs[len(rs) - 1] * 1.2, rs[len(rs) - 1] * .6])
+        rotate(-5)
+            rounded_square(size = [beginning_radius * 1.75, beginning_radius * 1.45], corner_r = beginning_radius / 5, center = true);
+
+        translate([-rs[len(rs) - 1] * 1.2, 0])
+            rounded_square(size = [beginning_radius * 1.8, beginning_radius * 1.35], corner_r = beginning_radius / 5, center = true);
+
+        translate([-rs[len(rs) - 1] * 1.2, -rs[len(rs) - 1] * .65])
+        rotate(5)
+            rounded_square(size = [beginning_radius * 1.5, beginning_radius * 1.5], corner_r = beginning_radius / 5, center = true);
+    }
+
+    module skull_scope() {
+        offset(thickness * 1.5) 
+        hull() {
+            translate([0, rs[len(rs) - 1] * 1.1])
+                eye_scope();
+
+            translate([0, -rs[len(rs) - 1] * 1.1])
+                eye_scope();
+        }
+        
+        offset(thickness * 6)
+        hull()
+            teeth_scope();
+    }
+
+    module skull() {
+        linear_extrude(height / 2, scale = skull_scale)
+        difference() {
+            translate([0, 0, -height / 2])
+                skull_scope();
+            teeth_scope();
+
+            // nose
+            translate([-beginning_radius * 2, beginning_radius / 4])
+            rotate(-15)
+            scale([2, 1])
+                circle(beginning_radius / 2.5);
+
+            translate([-beginning_radius * 2, -beginning_radius / 4])
+            rotate(15)
+            scale([2, 1])
+                circle(beginning_radius / 2.5);
+        }        
+    }
+    
+    difference() {
+        union() {
+            skull();
+            mirror([0, 0, 1])
+                skull();
+        }
+        
+        translate([0, rs[len(rs) - 1]] * 1.1) 
+        hull() {
+            half();	
+            mirror([0, 0, 1])
+                half();
+        }
+
+        translate([0, -rs[len(rs) - 1]] * 1.1) 
+        hull(){
+            half();	
+            mirror([0, 0, 1])
+                half();
+        }
+    }
+}