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Logo/logo.scad

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+
+length = 10;
+n = 5;
+
+// Draw all geometry
+//translate([0,0]) polygon(ngon(n, length));
+
+translate([0,0]) hollow_ngon(n, length);
+
+
+
+// Simple list comprehension for creating N-gon vertices
+function ngon(num, r) = 
+  [for (i=[0:num-1], a=i*360/num) [ r*cos(a), r*sin(a) ]];
+
+
+
+module hollow_ngon(num, r, width = 1) {
+   difference() {
+      translate([0,0]) polygon(ngon(num, r));
+      translate([0,0]) polygon(ngon(num, r-width));
+   }
+}
+
+l = 10;
+
+
+CubePoints = [
+  [  0,  0,  0 ],  //0
+  [ 10,  0,  0 ],  //1
+  [ 10,  7,  0 ],  //2
+  [  0,  7,  0 ],  //3
+  [  0,  0,  5 ],  //4
+  [ 10,  0,  5 ],  //5
+  [ 10,  7,  5 ],  //6
+  [  0,  7,  5 ]]; //7
+  
+CubeFaces = [
+  [0,1,2,3],  // bottom
+  [4,5,1,0],  // front
+  [7,6,5,4],  // top
+  [5,6,2,1],  // right
+  [6,7,3,2],  // back
+  [7,4,0,3]]; // left
+  
+polyhedron( CubePoints, CubeFaces );
+
+//The coordinates of the 12 additional vertices are (0, ±(1 + h), ±(1 − h2)), (±(1 + h), ±(1 − h2), 0) and (±(1 − h2), 0, ±(1 + h)).
+// (0, ±(1 + h), ±(1 − h2)), 
+  // (0, (1 + h), (1 − h2) ),
+// (±(1 + h), ±(1 − h2), 0) 
+// (±(1 − h2), 0, ±(1 + h))
+
+steps = 50;
+sides = 5;
+
+
+vert = [
+  
+]
+
+
+points = [
+	// first expression generating the points in the positive Y quadrant
+  //(0, ±(1 + h), ±(1 − h2)),	
+  for (a = [0 : sides]) [ a, 10 * sin(a * 360 / steps) + 10 ],
+	// second expression generating the points in the negative Y quadrant
+	for (a = [steps : -1 : 0]) [ a, 10 * cos(a * 360 / steps) - 20 ],
+	// additional list of fixed points
+	[ 10, -3 ], [ 3, 0 ], [ 10, 3 ]
+];
+
+polygon(points);