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https://github.com/Theaninova/Brick-Monorail.git
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feat: bezier tracks
This commit is contained in:
1
BOSL2
Submodule
1
BOSL2
Submodule
Submodule BOSL2 added at 33914a5d29
24
README.md
24
README.md
@@ -1,5 +1,23 @@
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# Brick Monorail
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Parametric Lego-compatible monorail tracks, designed specifically for 3d printing.
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Since the parts are made parametric, you can have any length or curve radius you want,
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but these are the original tracks you can replicate
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| Lego Name | Parameters |
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| ----------------- | ------------------------ |
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| Straight Long | `monorailStraight(l=32)` |
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| Straight Short | `monorailStraight(l=8)` |
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| Curve Long | `monorailCurve90(r=28)` |
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| Curve Short Left | ❌ |
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| Curve Short Right | ❌ |
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| Ramp Upper Part | ❌ |
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| Ramp Lower Part | ❌ |
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| Monoswitch | ❌ |
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| Point Right | ❌ |
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| Point Left | ❌ |
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## Design differences
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Injection molding has vastly different requirements to 3d printing.
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@@ -7,8 +25,10 @@ Due to this the original rails print absolutely horribly due to the copious amou
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Surfaces printed on supports just never look good.
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Because of that, I decided to instead of having a support part on the bottom, I'd carve out space for
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two stacked 1x2 plates, as well as a special two-high printable brick you can use for compatibility with the
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old support mounts.
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a 1x2 plate, which you can fit there for the same effect.
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The monorail tracks are also solid now, which is not something you can do in injection molding but leaves
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a really nice surface finish at the bottom of the rail for us.
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_These are 3d printing optimized, compatible rails, not replicas. Replicas print horribly due to support._
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1
lib/BOSL
1
lib/BOSL
Submodule lib/BOSL deleted from 4ce427a8a3
30
track.json
Normal file
30
track.json
Normal file
@@ -0,0 +1,30 @@
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{
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"fileFormatVersion": "1",
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"parameterSets": {
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"90 Degree Curve": {
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"Radius": "28",
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"Length": "32",
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"Type": "curve"
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},
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"Full Straight": {
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"Radius": "28",
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"Length": "32",
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"Type": "straight"
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},
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"Half Straight": {
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"Radius": "28",
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"Length": "16",
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"Type": "straight"
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},
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"Quarter Straight": {
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"Radius": "28",
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"Length": "8",
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"Type": "straight"
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},
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"4 Studs Straight": {
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"Radius": "28",
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"Length": "4",
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"Type": "straight"
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}
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}
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}
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135
track.scad
135
track.scad
@@ -1,7 +1,17 @@
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include <lib/BOSL/shapes.scad>;
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include <lib/BOSL/transforms.scad>;
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include <lib/BOSL/constants.scad>;
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include <lib/BOSL/beziers.scad>;
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include <BOSL2/std.scad>;
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include <BOSL2/beziers.scad>;
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Type="straight"; // [straight, curve]
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// Only applies to straight tracks
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Length=8; // [4:1:56]
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// Only applies to curves
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Radius=28; // [4:1:36]
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// The angle at which the curve starts
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StartAngle=0; // [0:15:360]
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// The angle at which the curve ends
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EndAngle=45; // [0:15:360]
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module __CustomizerLimit__() {}
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$LDU=0.4;
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@@ -18,10 +28,6 @@ $edgeTolerance=$LDU / 2;
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$len = 20;
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//translate([28.75, -232, -5.75]) rotate([0, 0, 90]) import("straight.stl");
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$baseHeight = $tile;
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$baseWidth = 4 * $tile;
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@@ -51,12 +57,12 @@ module tooth() {
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}
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module brickSlot(w=1, l=1, h=3) {
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cuboid([$tile * w, $tile * l, $plate * h], align=V_DOWN);
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cube([$tile * w, $tile * l, $plate * h], anchor=TOP);
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mirror_copy([1, 0, 0])
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mirror_copy([0, 1, 0])
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translate([$tile / 2, $tile / 2, 0])
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cyl(d=$fillet, h=$plate * h, align=V_DOWN, $fn=12);
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cuboid([$stud, $stud, $studHeight * 2], align=V_TOP);
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cyl(d=$fillet, h=$plate * h, anchor=TOP, $fn=12);
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cube([$stud, $stud, $studHeight * 2], anchor=BOTTOM);
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}
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module endCapStraight() {
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@@ -64,44 +70,44 @@ module endCapStraight() {
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union() {
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difference() {
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union() {
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cuboid([$width, $tile * 2, $tile], edges=EDGE_BOT_FR+EDGE_BOT_RT+EDGE_BOT_LF);
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cube([$width, $tile * 2, $tile], anchor=CENTER);
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difference() {
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mirror_copy([0, 1, 0])
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translate([0, $tile / 2, 0])
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cyl(l=$width + $studHeight * 2, d=$stud, orient=ORIENT_X, $fn=24);
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cyl(l=$width + $studHeight * 2 + $LDU / 2, d=$stud + $LDU, orient=LEFT, $fn=24);
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mirror_copy([1, 0, 0])
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translate([$tile * 2, 0, -$stud / 2])
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rotate([0, -14, 0])
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cuboid([$studHeight * 10, $tile * 4, $LDU * 2], align=V_TOP+V_LEFT);
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translate([$tile * 2, 0, -$stud / 2 - 0.2])
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rotate([0, -7, 0])
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cube([$studHeight * 10, $tile * 4, $LDU], anchor=BOTTOM+RIGHT);
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}
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translate([$tile, -$tile, 0]) cuboid([8 * $LDU, $LDU, $tile], align=V_RIGHT+V_FRONT);
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translate([$tile, -$tile, 0]) cube([8 * $LDU, $LDU, $tile], anchor=LEFT+BACK);
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}
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// Fingernail slot
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mirror_copy([1, 0, 0])
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translate([$width / 2, 0, $tile / 2])
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cuboid([$LDU, $tile, $LDU])
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translate([$plate, $tile / 2, $tile - $LDU]) cube([$LDU, $tile, $LDU]);
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translate([$width + $plate - $LDU, $tile / 2, $tile - $LDU]) cube([$LDU, $tile, $LDU]);
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// Brick slots
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mirror_copy([1, 0, 0])
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translate([$tile / 2, -$tile / 2, $tile / 2 - $plate * 2])
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brickSlot();
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// Bridging improvements
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translate([0, 0, $tile / 2 - $plate * 2]) cuboid([$tile * 2, $tile - 4 * $LDU, $LDU], align=V_FRONT);
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translate([0, -4 * $LDU, $tile / 2 - $plate * 2]) cuboid([$tile * 2, $stud, $LDU * 2], align=V_FRONT);
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translate([0, 0, $tile / 2 - $plate * 2]) cube([$tile * 2, $tile - 4 * $LDU, $LDU], anchor=BACK);
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translate([0, -4 * $LDU, $tile / 2 - $plate * 2]) cube([$tile * 2, $stud, $LDU * 2], anchor=BACK);
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// Fingernail slot
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mirror_copy([1, 0, 0])
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translate([$width / 2, 0, $tile / 2])
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cube([$LDU * 3, $tile, $LDU * 3], anchor=CENTER)
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translate([$plate, $tile / 2, $tile - $LDU]) cube([$LDU, $tile, $LDU]);
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translate([$width + $plate - $LDU, $tile / 2, $tile - $LDU]) cube([$LDU, $tile, $LDU]);
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// End Slots
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translate([-$tile, -$tile, 0]) cuboid([8 * $LDU, $LDU, $tile], align=V_LEFT+V_BACK);
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place_copies([[-$tile, -$tile + $LDU], [$tile + 8 * $LDU, -$tile, 0]])
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translate([-$tile, -$tile, 0]) cube([8 * $LDU, $LDU, $tile], anchor=RIGHT+FRONT);
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move_copies([[-$tile, -$tile + $LDU], [$tile + 8 * $LDU, -$tile, 0]])
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mirror_copy([1, 0, 0], cp=[-4 * $LDU, 0, 0])
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cyl(d=$fillet, h=$tile, $fn=12);
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}
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// Rail
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translate([0, $teethTolerance / 2, $tile / 2]) cuboid([$teethRailWidth, $tile * 2 - $teethTolerance, $plate], align=V_TOP);
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translate([0, $teethTolerance / 2, $tile / 2]) cuboid([$teethRailWidth, $tile * 2 - $teethTolerance, $plate], anchor=BOTTOM);
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translate([0, -$tile, $tile / 2]) group() {
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for (i = [0:(2 * $teeth - 1)]) {
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translate([0, i * $teethWidth, 0]) tooth();
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@@ -110,15 +116,66 @@ module endCapStraight() {
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}
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}
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module curve90(r=12) {
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translate([r * $tile, $tile, 0]) endCapStraight();
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translate([$tile, r * $tile, 0]) rotate(-90) endCapStraight();
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//ir = ($r
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path = [[2 * $tile, r * $tile, 0], [r * $tile / 2, r * $tile, 0], [r * $tile, r * $tile / 2, 0], [r * $tile, 2 * $tile, 0]];
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extrude_2d_shapes_along_bezier(path) {
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circle(r=10);
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module monorailCurve(p0, p1, p2, resolution=512) {
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union() {
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/*translate([r * $tile, $tile, 0]) endCapStraight();
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translate([$tile, r * $tile, 0]) rotate(-90) endCapStraight();
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$radius = (r - 2) * $tile;*/
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bez = [p0, p1, p2];
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debug_bezier(bez, N=len(bez)-1);
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$n_teeth = round(bezier_length(bez) / $tile * $teeth);
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echo($n_teeth);
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$points = bezier_curve(bez, $n_teeth);
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translate($points[0]) rot(from=[0, 1, 0], to=bezier_tangent(bez, 0)) fwd($tile) endCapStraight();
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translate($points[len($points) - 1]) rot(from=[0, -1, 0], to=bezier_tangent(bez, 1)) fwd($tile) endCapStraight();
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path_sweep([
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[-$teethRailWidth / 2, $tile / 2 + $plate],
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[-$teethRailWidth / 2, $tile / 2],
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[-2 * $tile, $tile / 2],
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[-2 * $tile, -$tile / 2],
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[2 * $tile, -$tile / 2],
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[2 * $tile, $tile / 2],
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[$teethRailWidth / 2, $tile / 2],
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[$teethRailWidth / 2, $tile / 2 + $plate],
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], $points, tangent=bezier_tangent(bez, [0:1/$n_teeth:1]));
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translate([0, 0, $tile / 2]) path_copies($points, n=$n_teeth) rotate([-90, 90, 0]) tooth();
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//extrude_2d_shapes_along_bezier(path) square([4 * $tile, $tile]);
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/*translate([2 * $tile, 2 * $tile]) intersection() {
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arced_slot(r=$radius, h=$tile, sd=4 * $tile, sa=sa, ea=ea, $fn=resolution);
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}
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translate([2 * $tile, 2 * $tile, $tile / 2])
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arced_slot($radius, h=$plate, sd=$teethRailWidth, align=V_TOP, sa=sa, ea=ea, $fn=resolution);
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translate([2 * $tile, 2 * $tile, $tile / 2])
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arc_of(n = round(((PI * $radius) / (180 / (ea - sa))) / $tile * $teeth), r=(r - 2) * $tile, rot=true, sa=sa, ea=ea, $fn=resolution)
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tooth();*/
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}
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}
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//curve90();
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endCapStraight();
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module monorailStraight(l) {
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union() {
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translate([0, $tile, 0]) endCapStraight();
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translate([0, (l - 1) * $tile, 0]) rotate(180) endCapStraight();
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if (l > 4) {
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translate([0, $tile * 2, 0]) cube([4 * $tile, (l - 4) * $tile, $tile], anchor=FRONT);
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translate([0, $tile * 2, $tile / 2]) cube([$teethRailWidth, (l - 4) * $tile, $plate], anchor=BOTTOM+FRONT);
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translate([0, $tile * 2, $tile / 2]) group() {
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for (i = [0:($teeth * (l - 4) - 1)]) {
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translate([0, i * $teethWidth, 0]) tooth();
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}
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};
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}
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}
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}
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if (Type == "straight")
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monorailStraight(l=Length);
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else if (Type == "curve")
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monorailCurve(p0=[0, 0, 0], p1=[5, 40, 0], p2=[80, 80, 0]);
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// endCapStraight();
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// translate([28.75, -232, -5.75]) rotate([0, 0, 90]) import("straight.stl");
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