Refactore code: global and geometry variables now more clear, stacking function easier to read

2025-04-22 20:24:44 +02:00
parent b34b941fef
commit d31d0044a3
2 changed files with 59 additions and 88 deletions
@@ -0,0 +1,59 @@
+// ======== Global Parameters ======== //
+$fn = 75;
+inlet_segments     = 60;
+outlet_segments     = 20;
+
+// ======== Venturi Geometry ======== //
+inlet_length   = 250;
+outlet_length  = 350;
+inlet_radius   = 300;
+throat_radius  = 80;
+outlet_radius  = 110;
+wall_thickness = 5;
+
+inlet_curve_factor  = 2;
+outlet_curve_factor = 1.5;
+
+// ======== Stacking Function ======== //
+module stacked_shell(length, r_end, thickness, segments, curve_factor, is_outer = true) {
+    for (i = [0:segments - 1]) {
+        h = length / segments;
+        t0 = i / (segments - 1);
+        t1 = (i + 1) / (segments - 1);
+
+        r1 = throat_radius + (r_end - throat_radius) * pow(t0, curve_factor);
+        r2 = throat_radius + (r_end - throat_radius) * pow(t1, curve_factor);
+
+        if (!is_outer) {
+            r1 = r1 - thickness;
+            r2 = r2 - thickness;
+        }
+
+        translate([0, 0, i * h])
+            cylinder(h = h, r1 = r1, r2 = r2);
+    }
+}
+
+// ======== Inlet Module ======== //
+module inlet() {
+    difference() {
+        union()
+            stacked_shell(inlet_length, inlet_radius, wall_thickness, inlet_segments, inlet_curve_factor, true);
+        union()
+            stacked_shell(inlet_length, inlet_radius, wall_thickness, inlet_segments, inlet_curve_factor, false);
+    }
+}
+
+rotate([0, -90, 0]) inlet();
+
+// ======== Outlet Module ======== //
+module outlet() {
+    difference() {
+        union()
+            stacked_shell(outlet_length, outlet_radius, wall_thickness, outlet_segments, outlet_curve_factor, true);
+        union()
+            stacked_shell(outlet_length, outlet_radius, wall_thickness, outlet_segments, outlet_curve_factor, false);
+    }
+}
+
+rotate([0, 90, 0]) outlet();