Reorganize: kebab-case names, per-item subdirectories, regroup items

box-clamp/box-clamp.scad

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+/* [Clamp Dimensions] */
+// Top arm length (mm) 
+top_arm_length   = 55; // [10:1:250]
+// Lower arm length (mm) 
+lower_arm_length = 45; // [10:1:250]
+// Clamp height, i.e. distance between arms (mm) 
+clamp_height = 85; // [5:1:250]
+// Width of the clamp (mm)
+clamp_width   = 20; // [5:1:100]
+// Thickness of the clamp, i.e. more increases stability
+clamp_thickness = 3.0; // [1:0.5:6]
+
+/* [Clamp Features] */
+// Increases the grip by adding a pattern to the top arm
+with_texture       = false;
+// Use S‐curve for the lower arm when enabled; otherwise, a straight lower arm is used.
+with_s_curve = true;
+// Helps to avoid stress fractures by adding a stress relief on the corner of the lower arm
+add_stress_relief = true;
+
+// Increase the back wall height by 1 mm if texture is enabled.
+effective_clamp_height = clamp_height + (with_texture ? 1 : 0);
+
+/* --- Function: S-Curve Center Line --- */
+function s_curve_y(x) = - (clamp_thickness / sqrt(3)) * sin(360 * x / lower_arm_length) + (clamp_thickness / 2);
+
+/* --- Module: S-Curve Lower Arm --- */
+module lower_arm_s_curve() {
+  translate([clamp_thickness/2, clamp_thickness/2]) {
+    num_segments = 100; // Increase for a smoother curve.
+    union() {
+      for (i = [0 : num_segments-1]) {
+        x0 = lower_arm_length * i / num_segments;
+        x1 = lower_arm_length * (i+1) / num_segments;
+        y0 = s_curve_y(x0);
+        y1 = s_curve_y(x1);
+        hull() {
+          translate([x0, y0])
+            circle(r = clamp_thickness/2, $fn = 50);
+          translate([x1, y1])
+            circle(r = clamp_thickness/2, $fn = 50);
+        }
+      }
+    }
+  }
+}
+
+/* --- Module: Rounded Lower Arm (if S-curve is disabled) --- */
+module lower_arm_rounded() {
+  translate([0, 0]) {
+    union() {
+      square([lower_arm_length, clamp_thickness]);
+      intersection() {
+         translate([lower_arm_length, clamp_thickness/2])
+           circle(r = clamp_thickness/2, $fn = 50);
+         translate([lower_arm_length, 0])
+           square([clamp_thickness, clamp_thickness]);
+      }
+    }
+  }
+}
+
+/* --- Module: Rounded Top Arm --- */
+module top_arm_rounded() {
+  union() {
+    square([top_arm_length, clamp_thickness]);
+    intersection() {
+      translate([top_arm_length, clamp_thickness/2])
+        circle(r = clamp_thickness/2, $fn = 50);
+      translate([top_arm_length, 0])
+        square([clamp_thickness, clamp_thickness]);
+    }
+  }
+}
+
+difference() {
+  $fn = 100;
+  linear_extrude(height = clamp_width) {
+    union() {
+      // Lower Arm 
+      if (with_s_curve)
+        lower_arm_s_curve();
+      else
+        lower_arm_rounded();
+      
+      // Back Wall
+      translate([0, clamp_thickness])
+        square([clamp_thickness, effective_clamp_height]);
+      
+      // Top Arm
+      translate([0, clamp_thickness + effective_clamp_height])
+        top_arm_rounded();
+      
+      // Optional Texture on the Top Arm's Inner Side
+      if (with_texture) {
+        texture_length = top_arm_length - clamp_thickness;
+        for (i = [0 : texture_length - 1]) {
+          translate([clamp_thickness + i, clamp_thickness + effective_clamp_height]) {
+            hull() {
+              polygon(points = [[0, 0], [1, 0], [0.5, -1]]);
+              translate([0.01, 0])
+                polygon(points = [[0, 0], [1, 0], [0.5, -1]]);
+            }
+          }
+        }
+      }
+    }
+  }
+  
+  // Subtractive Stress Relief
+  if (add_stress_relief) {
+    if (with_s_curve) {
+    translate([clamp_thickness*1.1, clamp_thickness*1.5])
+      linear_extrude(height = clamp_width + 1)
+        circle(r = clamp_thickness * 0.3);
+    } else {
+    translate([clamp_thickness*1.1, clamp_thickness*1])
+      linear_extrude(height = clamp_width + 1)
+        circle(r = clamp_thickness * 0.3);
+    }
+  }
+}