improvements

.gitignore

@@ -1 +1,2 @@
 *.stl
+/build/

README.md

@@ -8,18 +8,21 @@ but these are the original tracks you can replicate
 
 As an overview, or why it's worth a try: They print rapidly on modern printers, and cost barely anything.
 
-| Name                  | Material Cost | Print Time |
-| --------------------- | ------------- | ---------- |
-| C15                   | ~10ct         | 45m        |
-| C7                    | ~5ct          | 15m        |
-| S25                   | ~12ct         | 1h         |
-| S10                   | ~5ct          | 15m        |
-| S5                    | ~5ct          | 15m        |
-| Classic R28 90° Curve | ~25ct         | 2h         |
-| Classic R28 45° Curve | ~12ct         | 1h         |
-| Classic L32 Straight  | ~20ct         | 1.5h       |
-| Classic L16 Straight  | ~10ct         | 45m        |
-| Classic L8 Straight   | ~5ct          | 15m        |
+| Preset                        | Cost  | Time | Image                                                                            |
+| ----------------------------- | ----- | ---- | -------------------------------------------------------------------------------- |
+| C15                           | ~10ct | 45m  | ![C15](./assets/generated/C15.png)                                               |
+| C7                            | ~5ct  | 15m  | ![C7](./assets/generated/C7.png)                                                 |
+| S25                           | ~12ct | 1h   | ![S25](./assets/generated/S25.png)                                               |
+| S10                           | ~5ct  | 15m  | ![S10](./assets/generated/S10.png)                                               |
+| S5                            | ~5ct  | 15m  | ![S5](./assets/generated/S5.png)                                                 |
+| S4                            | ~5ct  | 15m  | ![S4](./assets/generated/S4.png)                                                 |
+| Classic Full Curve (R28 90°)  | ~25ct | 2h   | ![Classic Full Curve](./assets/generated/Classic%20Full%20Curve.png)             |
+| Classic Half Curve (R28 45°)  | ~12ct | 1h   | ![Classic Half Curve](./assets/generated/Classic%20Half%20Curve.png)             |
+| Classic Full Straight (L32)   | ~20ct | 1.5h | ![Classic Full Straight](./assets/generated/Classic%20Full%20Straight.png)       |
+| Classic Half Straight (L16)   | ~10ct | 45m  | ![Classic Half Straight](./assets/generated/Classic%20Half%20Straight.png)       |
+| Classic Quarter Straight (L8) | ~5ct  | 15m  | ![Classic Quarter Straight](./assets/generated/Classic%20Quarter%20Straight.png) |
+
+You can also generate your own custom rails with any length, radius or angle.
 
 Todo: ramps, switches, train assembly
 
@@ -62,7 +65,7 @@ How it fits
 - An s-curve with C15 moves over 20 studs, diagonals can be done with any length divisible by 5
 - An s-curve with C7 moves two studs, but diagonals require a full S25 to land cleanly again.
 
-![](./r25.svg)
+![](./assets/r25.svg)
 
 ## Printing
 
@@ -81,10 +84,10 @@ balance of speed and quality. A short rail will take about an hour to print.
 
 ### Filament
 
-| Color             | RAL Color  | Pantone | PLA Supplier | ABS Supplier |
-| ----------------- | ---------- | ------- | ------------ | ------------ |
-| Light Bluish Gray | `RAL 7040` |         | dasfilament  |              |
-| Light Gray        | `RAL 7005` |         |              |              |
+| Color             | RAL        | PLA Supplier | ABS Supplier |
+| ----------------- | ---------- | ------------ | ------------ |
+| Light Bluish Gray | `RAL 7040` | dasfilament  |              |
+| Light Gray        | `RAL 7005` |              |              |
 
 - None of these colors will be an exact match, just the texture of 3d printing it can make a huge difference, but usually fall close enough in the range.
 - The original rails will be in _Light Gray_, not _Light Bluish Gray_, but since I barely own any pre- 2004 color change bricks I chose to match my other bricks instead.
@@ -100,6 +103,6 @@ _Notes for newcomers:_
 
 In case you are new to 3D printing:
 
-- Most filaments (including PLA) release toxic gases when _burned_
+- Most filaments (including PLA) can release toxic gases when _burned_
 - FDM printing can cause fine particle emission
 - ABS when heated to normal printing temperatures can release styrene fumes

build.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+rm -rf build
+mkdir -p build
+rm -rf assets/generated
+mkdir -p assets/generated
+jq -r '.parameterSets | keys[]' track.json | while read -r preset; do
+	echo "Rendering $preset"
+	openscad -o "build/$preset.stl" -p track.json -P "$preset" track.scad
+	openscad -o "assets/generated/$preset.png" --imgsize=48,48 --render --autocenter --viewall -p track.json -P "$preset" track.scad
+done

track.json

@@ -1,30 +1,88 @@
 {
   "fileFormatVersion": "1",
   "parameterSets": {
-    "90 Degree Curve": {
-      "Radius": "28",
-      "Length": "32",
-      "Type": "curve"
+    "C15": {
+      "Angle": 1,
+      "Length": 15,
+      "Radius": 25,
+      "UseLengthForCurveAngle": true,
+      "Support": false
     },
-    "Full Straight": {
-      "Radius": "28",
-      "Length": "32",
-      "Type": "straight"
+    "C7": {
+      "Angle": 1,
+      "Length": 7,
+      "Radius": 25,
+      "UseLengthForCurveAngle": true,
+      "Support": false
     },
-    "Half Straight": {
-      "Radius": "28",
-      "Length": "16",
-      "Type": "straight"
+    "S25": {
+      "Angle": 0,
+      "Length": 25,
+      "Radius": 25,
+      "UseLengthForCurveAngle": true,
+      "Support": false
     },
-    "Quarter Straight": {
-      "Radius": "28",
-      "Length": "8",
-      "Type": "straight"
+    "S10": {
+      "Angle": 0,
+      "Length": 10,
+      "Radius": 25,
+      "UseLengthForCurveAngle": true,
+      "Support": false
     },
-    "4 Studs Straight": {
-      "Radius": "28",
-      "Length": "4",
-      "Type": "straight"
+    "S5": {
+      "Angle": 0,
+      "Length": 5,
+      "Radius": 25,
+      "UseLengthForCurveAngle": true,
+      "Support": false
+    },
+    "S4": {
+      "Angle": 0,
+      "Length": 4,
+      "Radius": 25,
+      "UseLengthForCurveAngle": true,
+      "Support": false
+    },
+    "Classic Full Straight": {
+      "Angle": 0,
+      "Length": 32,
+      "Radius": 28,
+      "UseLengthForCurveAngle": false,
+      "Support": false
+    },
+    "Classic Half Straight": {
+      "Angle": 0,
+      "Length": 16,
+      "Radius": 28,
+      "UseLengthForCurveAngle": false,
+      "Support": false
+    },
+    "Classic Quarter Straight": {
+      "Angle": 0,
+      "Length": 8,
+      "Radius": 28,
+      "UseLengthForCurveAngle": false,
+      "Support": false
+    },
+    "Classic Full Curve": {
+      "Angle": 90,
+      "Length": 8,
+      "Radius": 28,
+      "UseLengthForCurveAngle": false,
+      "Support": false
+    },
+    "Classic Half Curve": {
+      "Angle": 45,
+      "Length": 8,
+      "Radius": 28,
+      "UseLengthForCurveAngle": false,
+      "Support": false
+    },
+    "StudInsert": {
+      "Type": "studs"
+    },
+    "AntiStudInsert": {
+      "Type": "antistuds"
     }
   }
 }

track.scad

@@ -4,13 +4,18 @@ include <BOSL2/beziers.scad>;
 /* [Print Settings] */
 // Some feature are generated with respect to the layer height
 LayerHeight = 0.2; // [0.1,0.13,0.2]
-// Enable built-in support for 3d printing
-Support = true;
+// Mid-print stud inserts allowing the studs to be printed facing up seperately
+StudInserts = false;
+// Mid-print slot inserts eliminating the need for supports
+AntiStudInserts = false;
+// Part to generate
+Type = "rail"; // [rail,studs,antistuds]
+
 /* [Model Settings] */
 Length = 8; // [4:1:56]
 // Useful when working with Pythagorean Triples
 UseLengthForCurveAngle = true;
-Radius = 28; // [4:1:36]
+Radius = 25; // [4:1:36]
 // The angle the track takes
 Angle = 0.0;
 
@@ -59,6 +64,35 @@ module tooth() {
   ]);
 }
 
+module antiStudInsert(carve=true, depth=$studHeight * 2, supportHeight=$LDU * 4, supportWidth=$LDU * 4) {
+  difference() {
+    union() {
+      cube([$tile * 2, $tile, depth + supportHeight], anchor=FRONT+BOTTOM);
+      translate([0, $tile, 0]) cube([$tile * 2 + supportWidth, supportWidth, depth + supportHeight], anchor=FRONT+BOTTOM);
+      translate([0, $tile / 2, 0]) cube([$tile * 2 + supportWidth, supportWidth, depth + supportHeight], anchor=FRONT+BOTTOM);
+    }
+
+    if (carve) {
+      mirror_copy([1, 0, 0])
+      translate([$tile / 2, $tile / 2, 0]) group() {
+        cube([$stud, $stud, depth], anchor=BOTTOM+CENTER);
+        mirror_copy([0, 1, 0])
+          mirror_copy([1, 0, 0])
+          translate([$LDU * 2, $LDU * 2, 0])
+          cube([$stud / 2, $stud / 2, depth], anchor=BOTTOM+FRONT+LEFT);
+      }
+    }
+  }
+}
+
+module studInsert(supportThickness = $LDU * 4) {
+  mirror_copy([0, 1, 0]) translate([0, $tile / 2, 0]) group() {
+    cube([supportThickness, $stud, $stud], anchor=RIGHT);
+    cyl(l=$studHeight, d=$stud, $fn=48, anchor=TOP, orient=LEFT);
+  }
+  translate([-supportThickness, 0, 0]) cube([supportThickness, $tile + $stud + $LDU, $stud], anchor=RIGHT);
+}
+
 module brickSlot(w=1, l=1, h=3) {
   cube([$tile * w, $tile * l, $plate * h], anchor=TOP);
   mirror_copy([1, 0, 0])
@@ -74,26 +108,20 @@ module endCapStraight(includeRail=true) {
     difference() {
       union() {
         cube([$width, $tile * 2, $tile], anchor=CENTER);
-        mirror_copy([0, 1, 0])
-          translate([0, $tile / 2, 0])
-          cyl(l=$width + $studHeight * 2 + $LDU / 2, d=$stud, orient=LEFT, $fn=24);
+        if (!StudInserts) {
+          mirror_copy([1, 0, 0]) translate([$width / 2, 0, 0]) studInsert();
+        }
 
         // End Slot
         translate([$tile + $LDU, -$tile, 0]) cube([6 * $LDU, $LDU, $tile], anchor=LEFT+BACK);
-
-        if (Support) {
-          mirror_copy([1, 0, 0]) difference() {
-            translate([$tile * 2 - $studHeight, 0, -$tile / 2]) cube([$LDU * 3, $tile * 2 - $LDU - 2, $LDU * 6], anchor=BOTTOM+RIGHT);
-            mirror_copy([0, 1, 0])
-              translate([0, $tile / 2, 0])
-              cyl(l=$width + $studHeight * 2 + $LDU / 2, d=$stud + LayerHeight * 2, orient=LEFT, $fn=24);
-          }
-        }
       }
-      // Brick slots
-      mirror_copy([1, 0, 0])
-        translate([$tile / 2, -$tile / 2, $tile / 2 - $plate * 2])
-        brickSlot();
+
+      if (StudInserts) {
+        mirror_copy([1, 0, 0]) translate([$width / 2, 0, 0]) studInsert();
+      }
+      
+      translate([0, -$tile, $tile / 2 - $plate * 2]) cube([$tile * 2, $tile, $plate], anchor=FRONT+TOP);
+      translate([0, -$tile, $tile / 2 - $plate * 2]) antiStudInsert(carve=false);
 
       // Fingernail slot
       mirror_copy([1, 0, 0])
@@ -113,11 +141,8 @@ module endCapStraight(includeRail=true) {
         cyl(d=$fillet, h=$tile, $fn=12);
     }
 
-    if (Support) {
-      translate([0, -$tile, -$tile / 2])
-        rect_tube(size=[$tile * 2 - $LDU * 2, $tile - $LDU * 2], h=$LDU * 4 - LayerHeight, wall=$LDU * 2, anchor=FRONT+BOTTOM);
-      translate([0, -$tile, -$tile / 2])
-        cube([$LDU * 2, $tile - $LDU * 2, $LDU * 4 - LayerHeight], anchor=FRONT+BOTTOM);
+    if (!AntiStudInserts) {
+      translate([0, -$tile, $tile / 2 - $plate * 2]) antiStudInsert();
     }
 
     if (includeRail) {
@@ -137,6 +162,9 @@ module monorailCurve(r=28, sa, ea, p1) {
   angle = [180 - ea, 180 + sa];
   points = arc($n_teeth, r=(r * $tile), angle=angle);
 
+  echo(points[0] / $tile);
+  echo(points[len(points) - 1] / $tile);
+
   translate([r * $tile, 0, 0]) union() {
     translate(points[0]) rot(180 - ea) back($tile) endCapStraight(includeRail=false);
     translate(points[len(points) - 1]) rot(sa) back($tile) endCapStraight(includeRail=false);
@@ -176,10 +204,17 @@ module monorailStraight(l) {
   }
 }
 
-if (Angle == 0)
-  monorailStraight(l=Length);
-else
-  monorailCurve(Radius, sa=0, ea=UseLengthForCurveAngle ? asin(Length / Radius) : Angle);
+if (Type == "rail") {
+  if (Angle == 0)
+    monorailStraight(l=Length);
+  else
+    monorailCurve(Radius, sa=0, ea=UseLengthForCurveAngle ? asin(Length / Radius) : Angle);
+} else if (Type == "studs") {
+  rotate([0, -90, 0]) studInsert();
+} else if (Type == "antistuds") {
+  rotate([180, 0, 180]) antiStudInsert();
+}
+
 
 // endCapStraight();
 // translate([28.75, -232, -5.75]) rotate([0, 0, 90]) import("straight.stl");