Integrating the ingenious concept of design parameterization from openscad-meistern.de

cad/CyanStripe/Case.scad

@@ -13,8 +13,8 @@ $E   = 0.001;  // ε
 plexi = 3;
 
 // c = case
-c_sx = pcb_w() + 0;
-c_sy = pcb_h() + 0;
+c_sx = PCB("pcb_sx") + 0;
+c_sy = PCB("pcb_sy") + 0;
 c_sz = 20;
 c_fs = 15;  // frontSpace = pcb to upper plexi
 
@@ -22,15 +22,15 @@ c_fs = 15;  // frontSpace = pcb to upper plexi
 
 module frontPlexiOutline() {
   /* pcbScrewHoles()
-    circle(d=M3()*2); */
+    circle(d=PCB("M3")*2); */
   
-  txy = sc_left_off()+M3();
+  txy = PCB("sc_left_off")+PCB("M3");
 
-  translate([-pcb_w()/2, -pcb_h()/2])
-    mixedRoundRect(txy, txy, [0, pcb_edge_r(), 0, M3()]);
+  translate([-PCB("pcb_sx")/2, -PCB("pcb_sy")/2])
+    mixedRoundRect(txy, txy, [0, PCB("pcb_edge_r"), 0, PCB("M3")]);
   
-  translate([-pcb_w()/2, pcb_h()/2 - txy])
-    mixedRoundRect(txy, txy, [pcb_edge_r(), 0, M3(), 0]);
+  translate([-PCB("pcb_sx")/2, PCB("pcb_sy")/2 - txy])
+    mixedRoundRect(txy, txy, [PCB("pcb_edge_r"), 0, PCB("M3"), 0]);
   
   
 }
@@ -54,7 +54,7 @@ if ($preview) {
 
   pcb3D();
 
-  translate([0, 0, pcb_t()*3])
+  translate([0, 0, PCB("pcb_t")+aj_h()])
     frontPlexi();
 
 } else if ($part == "CoverGlass") {

cad/CyanStripe/PCB.scad

@@ -10,14 +10,40 @@ $E   = 0.01;  // ε
 
 // note: using constant functions here because they get imported via `use`
 
-function pcb_t() = 1.6;
+// exporting *everything* as a constant function is bad.
+// taking the ingenious concept from `Project 4` of the book from openscad-meistern.de
+
+pcb_data = [
+
+  ["pcb_t", 1.6],
+  ["pcb_sx", 75.5],
+  ["pcb_sy", 65.0],
+
+  ["pcb_edge_r", 3.0],
+
+  ["M3", 3.2],
+
+  // LED terminal data
+  ["tled_x", 5.75 + 23],
+  ["tled_y", [-18.5, 0, 18.5]],
+
+  // co = cut-out
+  ["co_w", 6.1],
+  ["co_h", 18.0],
+  ["co_x", -34.7],
+  ["co_y", -8.6],
+
+
+  ["sc_left_off", 5.0],  // left side screw holes offset from edge
+
+
+];
+
+function PCB(key) = [ for (d=pcb_data) if (d[0] == key) d[1] ][0];
+
 
-function pcb_w() = 75.5;
-function pcb_h() = 65.0;
 
-function pcb_edge_r() = 3;
 
-function M3() = 3.2;
 
 // x is all the same and y is +- 18.5 and 0 as there are three of them
 function terminals_x() = 28.75;
@@ -30,18 +56,6 @@ function tpow_y()  =  14.50;
 // function tpow_sy() =  11.50;
 // function tpow_sz() =   3.00;  // TODO: measure!!
 
-tled_y = [18.5, 0, -18.5];
-function tled_x() = 5.75 + 23;
-function tled_y(i) = tled_y(i);
-
-function sc_left_off() = 5.0;  // left side screw holes offset from edge
-
-// co = cut-out
-co_w =   6.1;
-co_h =  18.0;
-co_x = -34.7;
-co_y =  -8.6;
-
 
 
 module pcbScrewHoles(tz=0) {
@@ -53,17 +67,17 @@ module pcbScrewHoles(tz=0) {
 module pcbOutline() {
 
   difference() {
-    roundRect(pcb_w(), pcb_h(), pcb_edge_r(), center=true);
+    roundRect(PCB("pcb_sx"), PCB("pcb_sy"), PCB("pcb_edge_r"), center=true);
     
-    pcbScrewHoles() circle(d=M3());
+    pcbScrewHoles() circle(d=PCB("M3"));
     
-    translate([co_x, co_y, 0]) square([co_w + $E, co_h], center=true);
+    translate([PCB("co_x"), PCB("co_y"), 0]) square([PCB("co_w") + $E, PCB("co_h")], center=true);
   }
 }
 
-module pcb3D(pcb_t=pcb_t()) {
+module pcb3D(pcb_t=PCB("pcb_t")) {
   FR4()
-    linear_extrude(pcb_t())
+    linear_extrude(PCB("pcb_t"))
       pcbOutline();
 
   if ($preview) {
@@ -71,27 +85,27 @@ module pcb3D(pcb_t=pcb_t()) {
     pcbScrewHoles()
       Solder()
         difference() {
-          translate([0, 0, -$E]) cylinder(d=M3()*2, h=pcb_t()+2*$E);
-          translate([0, 0, -$E*2]) cylinder(d=M3()-$E,   h=pcb_t()+4*$E);
+          translate([0, 0, -$E]) cylinder(d=PCB("M3")*2, h=PCB("pcb_t")+2*$E);
+          translate([0, 0, -$E*2]) cylinder(d=PCB("M3")-$E,   h=PCB("pcb_t")+4*$E);
         }
 
 //    Solder()
-//      translate([tpow_x(), tpow_y(), pcb_t() - $E])
+//      translate([tpow_x(), tpow_y(), PCB("pcb_t") - $E])
 //        cube([tpow_sx(), tpow_sy(), tpow_sz()], center=true);
-//    translate([tpow_x(), tpow_y(), pcb_t() - $E])
+//    translate([tpow_x(), tpow_y(), PCB("pcb_t") - $E])
 //      terminal2();
 
 
-    translate([tpow_x(), tpow_y(), pcb_t()])
+    translate([tpow_x(), tpow_y(), PCB("pcb_t")])
       terminal2();
 
-    for (ty=tled_y)
-      translate([tled_x(), ty, pcb_t()])
+    for (ty=PCB("tled_y"))
+      translate([PCB("tled_x"), ty, PCB("pcb_t")])
         rotate([0, 0, 180])
           terminal3();
 
     for (ty=[-aj_y(), aj_y()-aj_sy()])
-      translate([aj_x(), ty, pcb_t()])
+      translate([aj_x(), ty, PCB("pcb_t")])
         audioJack();
 
   }
@@ -154,7 +168,7 @@ module terminal3() {
 
 // aj = audio jack
 function aj_x() = -12.25;
-function aj_y() = pcb_h()/2;
+function aj_y() = PCB("pcb_sy")/2;
 function aj_h() = 5.0;
 function aj_sx() = 12.4;
 function aj_sy() = 11.7;