Scripting: Lua 5.4 with a fry library (shapes, own meshes, lathe, extrude, add/subtract/overlap, points, the look); a Script panel (F5 / Ctrl+Enter runs, one undo step, an error takes it all back), Script menu, example scripts, fry_run; tests run every example

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

content/Fry3DX/scripts/box_with_lid.lua

@@ -0,0 +1,16 @@
+-- A box to print, with a lid and holes for M3 screws in its corners.
+local w, d, h, wall = 0.08, 0.06, 0.04, 0.002
+local box = fry.add("rounded_cube", {width = w, depth = d, height = h, name = "Box", color = "#d9d4c7"})
+local inside = fry.add("cube", {width = w - 2 * wall, depth = d - 2 * wall, height = h})
+inside.position = {0, 0, wall}
+box:subtract(inside)
+local lid = fry.add("cube", {width = w, depth = d, height = wall, name = "Lid", color = "#ff7828"})
+lid.position = {w + 0.02, 0, 0}
+for sx = -1, 1, 2 do
+  for sy = -1, 1, 2 do
+    local hole = fry.add("cylinder", {radius = 0.0016, height = 0.01, sides = 24})
+    hole.position = {w + 0.02 + sx * (w / 2 - 0.006), sy * (d / 2 - 0.006), -0.002}
+    lid:subtract(hole)
+  end
+end
+fry.frame()

content/Fry3DX/scripts/gear.lua

@@ -0,0 +1,14 @@
+-- A gear for 3D printing, with a hole for an M5 screw.
+local teeth, radius, depth, thick = 16, 0.03, 0.004, 0.006   -- metres
+local outline = {}
+for i = 0, teeth * 4 - 1 do
+  local a = i / (teeth * 4) * 2 * math.pi
+  local r = (i % 4 < 2) and radius + depth or radius
+  outline[#outline + 1] = {math.cos(a) * r, math.sin(a) * r}
+end
+local gear = fry.extrude(outline, thick, "Gear")
+gear.color = "#e0a030"
+local hole = fry.add("cylinder", {radius = 0.0027, height = 0.02, sides = 32})
+hole.position = {0, 0, -0.005}
+gear:subtract(hole)
+fry.frame()

content/Fry3DX/scripts/little_town.lua

@@ -0,0 +1,21 @@
+-- A little town: random houses on a grid, each a folder of its own.
+math.randomseed(7)
+local roofs = {"#a8432f", "#5a6470", "#8c5a3c"}
+for x = -2, 2 do
+  for y = -2, 2 do
+    local w, d, h = 0.6 + math.random() * 0.3, 0.6 + math.random() * 0.3, 0.5 + math.random() * 0.9
+    local walls = fry.add("cube", {width = w, depth = d, height = h, color = "#e8e0d0", name = "Walls"})
+    walls.position = {x * 1.4, y * 1.4, 0}
+    -- a wedge rises towards -X: two of them back to back make a ridge
+    local roof = fry.add("wedge", {width = d + 0.1, length = w / 2 + 0.05, height = 0.35, name = "Roof"})
+    local other = roof:copy()
+    roof.position = {x * 1.4 + w / 4 + 0.025, y * 1.4, h}
+    other.position = {x * 1.4 - w / 4 - 0.025, y * 1.4, h}
+    other.turn = {0, 0, 180}
+    local c = roofs[math.random(#roofs)]
+    roof.color, other.color = c, c
+    fry.group(string.format("House %d,%d", x, y), {walls, roof, other})
+  end
+end
+fry.look{sun_turn = 60, sun_height = 35}
+fry.frame()

content/Fry3DX/scripts/spiral_stairs.lua

@@ -0,0 +1,15 @@
+-- Spiral stairs round a pillar: change the numbers and run it again (F5).
+local steps, rise, turn = 18, 0.18, 22   -- how many, how high each, degrees each
+local width = 0.9
+
+fry.add("pillar", {radius = 0.12, height = steps * rise + 0.3, color = "#8a8a90", name = "Post"})
+local made = {}
+for i = 0, steps - 1 do
+  local step = fry.add("cube", {width = width, depth = 0.32, height = 0.05, color = "#b07a4a", name = "Step"})
+  step.turn = {0, 0, i * turn}
+  local a = math.rad(i * turn)
+  step.position = {math.cos(a) * width / 2, math.sin(a) * width / 2, (i + 1) * rise}
+  made[#made + 1] = step
+end
+fry.group("Stairs", made)
+fry.frame()

content/Fry3DX/scripts/vase.lua

@@ -0,0 +1,15 @@
+-- A vase turned on a lathe: the profile is {out, up} points from the bottom.
+local profile = {}
+local height, n = 0.4, 24
+for i = 0, n do
+  local t = i / n
+  -- a belly low down, a neck, a lip
+  local r = 0.06 + 0.07 * math.sin(t * math.pi * 1.1) + 0.02 * t * t
+  profile[#profile + 1] = {r, t * height}
+end
+table.insert(profile, 1, {0, 0})
+local vase = fry.lathe(profile, 64, "Vase")
+vase.color = "#3c6e9f"
+vase.rough = 0.25
+vase:thicken(0.004)   -- walls, so it prints hollow
+fry.frame()

content/Fry3DX/scripts/waves.lua

@@ -0,0 +1,12 @@
+-- Points moved by a formula: a plane made into waves, then given a thickness.
+local p = fry.add("plane", {width = 2, depth = 2, cuts = 40, name = "Waves"})
+local pts = p:points()
+for i, v in ipairs(pts) do
+  v.z = 0.08 * math.sin(v.x * 6) * math.cos(v.y * 5)
+end
+p:setpoints(pts)
+p:thicken(0.03)
+p.smooth = true
+p.color = "#2f8f9d"
+p:move(0, 0, 0.12)
+fry.frame()