bench-for-kids

// Bench for kids.
// Shaped like a friendly animal and sturdy enough for climbing.




@settings(defaultLengthUnit = cm)

// Define primary parameters for the bench geometry.
benchLength = 80 // overall end-to-end size
benchWidth = 40 // overall depth (front-to-back)
seatHeight = 35

// SEATING BLOCK (half-cylinder, rounded side up so it feels like an animal back)

// Because it's half a cylinder, the bench width equals the cylinder’s diameter.
benchSeatRadius = benchWidth / 2
// Height of the flat face of the cylinder: seat height minus cylinder radius.
benchSeatElevation = seatHeight - benchSeatRadius
// Center the bench in the scene by creating a sketch plane offset by half length.
seatSketchPlane = offsetPlane(XZ, offset = -benchLength / 2)

// Flat face of the cylinder sits one radius below the seat.
seatSketch = startSketchOn(seatSketchPlane)

seatProfile = startProfile(seatSketch, at = [-benchSeatRadius, benchSeatElevation])
  |> arc(interiorAbsolute = [0, seatHeight], endAbsolute = [benchSeatRadius, benchSeatElevation])
  |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
  |> close()

seatBody = extrude(seatProfile, length = benchLength)

// LEGS (four chunky, rounded cylinders)
legRadius = benchWidth * 0.12 // scale with bench width so model stays parametric


// Build one leg, then pattern-copy it to make the full set.
legSketch = startSketchOn(XY)
legProfile = circle(
  legSketch,
  center = [0, 0],
  radius = legRadius,
  tag = $legCircle,
)

// Make the leg a bit longer because it will be tilted later.
legHeight = benchSeatElevation * 1.1
legExtrudedBody = extrude(legProfile, length = legHeight, tagStart = $legCapStart)

// Round the foot: use a slightly smaller radius to avoid fillet errors.
legFilletRadius = legRadius * 0.9
legBody = fillet(
  legExtrudedBody,
  radius = legFilletRadius,
  tags = [
    getCommonEdge(faces = [legCircle, legCapStart])
  ],
)

// Position and array the legs.
legChassisWidth = benchWidth * 0.6
legChassisLength = benchLength * 0.8

firstLeg = translate(
  legBody,
  x = -legChassisWidth / 2,
  y = -legChassisLength / 2,
  z = 0,
)

// Pattern in X, then Y, to create all four legs.
allFourLegs = patternLinear3d(
       firstLeg,
       instances = 2,
       distance = legChassisWidth,
       axis = [1, 0, 0],
     )
  |> patternLinear3d(instances = 2, distance = legChassisLength, axis = [0, 1, 0])

// EARS (two small cylinders, tilted sideways slightly)

earHeight = 20
earRadius = legRadius * 0.9
earFilletRadius = earRadius * 0.9
earTiltAngle = 13
earDistance = benchWidth * 0.4 // defined for completeness, currently unused
earElevation = seatHeight * 0.9

// Ears sit roughly above the front legs.
earOffsetForward = legChassisLength / 2

earSketch = startSketchOn(offsetPlane(XY, offset = 0))
earProfile = circle(
  earSketch,
  center = [0, 0],
  radius = earRadius,
  tag = $earCircle,
)

earBody = extrude(earProfile, length = earHeight, tagEnd = $earCapEnd)
  |> fillet(
       radius = earFilletRadius,
       tags = [
         getCommonEdge(faces = [earCircle, earCapEnd])
       ],
     )
  |> translate(x = 0, y = -earOffsetForward, z = earElevation)
  |> rotate(
       roll = 0,
       pitch = earTiltAngle,
       yaw = 0,
       global = true,
     )

// Copy the first ear over to the other side with a circular array.
ears = patternCircular3d(
  earBody,
  instances = 2,
  axis = [0, 1, 0],
  center = [0, 0, 0],
  arcDegrees = -earTiltAngle * 2,
)

// TAIL (single cylinder at the rear, slightly rotated downward)


tailPlane = offsetPlane(XZ, offset = -benchLength * 0.45)
tailLength = earHeight * 1.2
tailRadius = earRadius * 0.9
tailFilletRadius = tailRadius * 0.9
tailElevation = benchSeatElevation + benchSeatRadius * 0.9

tailSketch = startSketchOn(tailPlane)
tailProfile = circle(
  tailSketch,
  center = [0, 0],
  radius = tailRadius,
  tag = $tailCircle,
)

tailBody = extrude(tailProfile, length = -tailLength, tagStart = $tailCapStart)
  |> fillet(
       radius = tailFilletRadius,
       tags = [
         getCommonEdge(faces = [tailCircle, tailCapStart])
       ],
     )
  |> rotate(roll = -10, pitch = 0, yaw = 0)
  |> translate(
       x = 0,
       y = 0,
       z = tailElevation,
       global = true,
     )