add lid design

cad/case2.scad

@@ -74,3 +74,31 @@ difference() {
     }
     //#translate([32.4,24.2,57/2-wall]) cube([46,30,57-wall],center=true);
 }
+
+module lid() {
+    z=8.0;
+    translate([100+corner,0,-wall])
+    difference() {
+        minkowski() {
+            cube([width-2*corner-2*(wall+tolerance),length-2*corner-2*(wall+tolerance),z]);
+            cylinder(r=corner+wall,h=0.1);
+        }
+        difference() {
+            translate([0,0,wall]) minkowski() {
+                cube([width-2*corner-2*(wall+tolerance),length-2*corner-2*(wall+tolerance),z+2]);
+                cylinder(r=corner,h=0.1);
+            }
+            translate([-corner+2,-corner+2,0]) cylinder(r=corner,h=z); // pi_z+wall+pi_thick
+            translate([width-corner-2,-corner+2,0]) cylinder(r=corner,h=z); // z-8
+            translate([-corner+2,length-corner-2,0]) cylinder(r=corner,h=z); // bottom_thick+53
+            translate([width-corner-2,length-corner-2,0]) cylinder(r=corner,h=z);
+        }
+
+        translate([-wall-tolerance,-wall-tolerance,0]) {
+        translate([-corner/2,-corner/2,z-8]) {cylinder(r=3.0/2,h=8+0.2); cylinder(r=6/2,h=3);}
+        translate([width-1.5*corner,-corner/2,z-8]) {cylinder(r=3.0/2,h=8+0.2); cylinder(r=6/2,h=3);}
+        translate([-corner/2,length-1.5*corner,z-8]) {cylinder(r=3.0/2,h=8+0.2); cylinder(r=6/2,h=3);}
+        translate([width-1.5*corner,length-1.5*corner,z-8]) {cylinder(r=3.0/2,h=8+0.2); cylinder(r=6/2,h=3);}
+        }
+    }
+}