Reorganize around function/purpose rather than file type.

2024-04-07 18:49:47 -05:00
parent 42e78ed35e
commit d4af5d3c36
141 changed files with 101779 additions and 0 deletions
@@ -0,0 +1,52 @@
+module triangularPrism(angle, side1, side2, height) {
+  linear_extrude(height)
+  polygon(points = [[0, 0], [0, side1], [side2 * sin(angle), side2 * cos(angle)]]);
+}
+
+module arcCylinder(outerRadius, height, degrees, innerRadius = 0, center = false) {
+  epsilon = 0.01;
+  degToCut = 360 - (degrees % 360);
+  triDeg = degToCut % 60;
+  triSideLen = (outerRadius + epsilon) / cos(triDeg / 2);
+  fullTriSide = (outerRadius + epsilon) / cos(30);
+  numFullTriangles = floor(degToCut / 60);
+
+  difference() {
+    // Main cylinder body
+    cylinder(h=height, r=outerRadius);
+
+    // Exclusion
+    translate([0, 0, -1*epsilon]) union() {
+
+      // Inner cylinder (to form hole creating the wall)
+      if (innerRadius > 0) {
+        cylinder(h=height + 2*epsilon, r=max(0, innerRadius));
+      }
+
+      // Partial circle cut-out
+      if (degToCut < 360) {
+        rotate([0, 0, -90 - 60 * numFullTriangles]) union() {
+
+          // All 60-degree cuts get an eqilateral triangle.
+          if (degToCut >= 60) {
+            for (i = [1:numFullTriangles]) {
+              // rotate([-60 * i, 0, 0]) mirror([0, 1, 0]) cube([cubeSideLen, cubeSideLen, height + 2*epsilon]);
+              rotate([0, 0, 60 * i]) triangularPrism(
+                angle = 60.1,
+                side1 = fullTriSide,
+                side2 = fullTriSide,
+                height = height + 2*epsilon);
+            }
+          }
+
+          // Cut out the remaining angle with a triangular prism
+          rotate([0, 0, 0.1]) triangularPrism(
+            angle = triDeg + 0.1,
+            side1 = triSideLen,
+            side2 = triSideLen,
+            height = height + 2*epsilon);
+        }
+      }
+    }
+  }
+}