final

case/case.scad

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+width = 70;
+depth = 70;
+height = 35;
+wt = 3;
+
+
+// Which one would you like to see?
+part = "both"; // [box:Box only, top: Top cover only, both: Box and top cover]
+
+// Size of your printer's nozzle in mm
+nozzle_size = 0.4;
+
+// Number of walls the print should have
+number_of_walls = 3; // [1:5]
+
+// Tolerance (use 0.2 for FDM)
+tolerance = 0.2; // [0.1:0.1:0.4]
+
+// Outer x dimension in mm
+x=width+2*number_of_walls*nozzle_size+2*3*nozzle_size;
+
+// Outer y dimension in mm
+y=depth+2*number_of_walls*nozzle_size+2*3*nozzle_size;
+
+// Outer z dimension in mm
+z=height+2*number_of_walls*nozzle_size+2*3*nozzle_size;
+
+// Radius for rounded corners in mm
+radius=4; // [1:20]
+
+/* Hidden */
+$fn=100;
+
+wall_thickness=nozzle_size*number_of_walls;
+hook_thickness = 3*nozzle_size;
+
+top_cover_wall_thickness = hook_thickness + wall_thickness;
+
+module bottom_box () {
+    difference(){
+        // Solid box
+        linear_extrude(z-wall_thickness){
+            minkowski(){
+                square([x-radius*2,y-radius*2], center=true);
+                circle(radius, center=true);
+            }
+        }
+        
+        // Hollow out
+        translate([0,0,wall_thickness]) linear_extrude(z){
+            minkowski(){
+                square([x-radius*2-wall_thickness*2+wall_thickness*2,y-radius*2-wall_thickness*2+wall_thickness*2], center=true);
+                circle(radius-wall_thickness);
+            }
+        }
+        //translate([x/2-5,0,z/2]) usb_port();
+    }
+    left_hook(); // left hook
+    rotate([180,180,0]) left_hook(); // right hook
+    front_hook(); // front hook
+    rotate([180,180,0]) front_hook(); // back hook
+    // TODO: hooks on the other two sides
+}
+
+module left_hook () {
+    
+    translate([(x-2*wall_thickness)/2,-y/2+radius*2,z-wall_thickness]) rotate([0,90,90]) {
+        difference(){
+            linear_extrude(y-2*radius*2){
+    polygon(points=[[0,0],[2*hook_thickness,0],[hook_thickness,hook_thickness]], center=true);
+        }
+             translate([hook_thickness, hook_thickness, 0]) rotate([45,0,0]) cube(2*hook_thickness, center=true);
+             translate([hook_thickness, hook_thickness, y-2*radius*2]) rotate([45,0,0]) cube(2*hook_thickness, center=true);        
+        }
+    }
+}
+    
+
+module front_hook () {
+    translate([(-x+4*radius)/2,-y/2+wall_thickness,z-wall_thickness]) rotate([90,90,90]) {
+        difference(){
+        linear_extrude(x-2*radius*2){
+    polygon(points=[[0,0],[2*hook_thickness,0],[hook_thickness,hook_thickness]], center=true);
+    }
+             translate([hook_thickness, hook_thickness, 0]) rotate([45,0,0]) cube(2*hook_thickness, center=true);
+             translate([hook_thickness, hook_thickness, x-2*radius*2]) rotate([45,0,0]) cube(2*hook_thickness, center=true);
+        }
+    }
+}
+
+
+module right_grove () {
+    translate([-tolerance/2+(x-2*wall_thickness)/2,-y/2+radius,wall_thickness+hook_thickness*2]) rotate([0,90,90]) linear_extrude(y-2*radius){
+    polygon(points=[[0,0],[2*hook_thickness,0],[hook_thickness,hook_thickness]], center=true);
+    }
+}
+
+
+module front_grove () {
+    translate([(-x+2*radius)/2,-y/2+wall_thickness+tolerance/2,wall_thickness+hook_thickness*2]) rotate([90,90,90]) linear_extrude(x-2*radius){
+    polygon(points=[[0,0],[2*hook_thickness,0],[hook_thickness,hook_thickness]], center=true);
+    }
+}
+
+module top_cover () {
+
+    // Top face
+    linear_extrude(wall_thickness){
+        minkowski(){
+            square([x-radius*2,y-radius*2], center=true);
+            circle(radius, center=true);
+        }
+    }
+    
+    difference(){
+        // Wall of top cover
+        linear_extrude(wall_thickness+hook_thickness*2){
+            minkowski(){
+                square([x-radius*2-wall_thickness*2-tolerance+wall_thickness*2,y-radius*2-wall_thickness*2-tolerance+wall_thickness*2], center=true);
+                circle(radius-wall_thickness, center=true);
+            }
+        }
+        
+        // Hollow out
+        // TODO: If radius is very small, still hollow out
+
+        translate([0,0,wall_thickness]) linear_extrude(z){
+            minkowski(){
+                square([x-radius*2-wall_thickness*2-2*top_cover_wall_thickness-tolerance+wall_thickness*2+top_cover_wall_thickness*2,y-radius*2-wall_thickness*2-2*top_cover_wall_thickness-tolerance+wall_thickness*2+top_cover_wall_thickness*2], center=true);
+            circle(radius-wall_thickness-top_cover_wall_thickness);
+            }
+        }
+    right_grove();
+    rotate([180,180,0]) right_grove();
+    front_grove();
+    rotate([180,180,0])  front_grove();
+    }
+  
+
+}
+
+// left_hook();
+print_part();
+
+module print_part() {
+	if (part == "box") {
+		bottom_box();
+	} else if (part == "top") {
+		top_cover();
+	} else if (part == "both") {
+		both();
+	} else {
+		both();
+	}
+}
+
+module both() {
+	translate([0,-(y/2+wall_thickness),0]) bottom_box();
+    translate([0,+(y/2+wall_thickness),0]) top_cover();
+}
+
+module usb_port() {
+    translate([0.3, 0, 0])
+    color("grey")
+    difference() {
+        union() {
+            cube([7.4, 6, 2.7]);
+            translate([-0.3, 5.4, -0.1])
+            cube([8, 0.6, 2.9]);
+        }
+    }
+}