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Sweep

sweep() moves a profile along a path to create a solid. It's used for pipes, rails, and any shape that follows a curve.

import { sketch, sweep } from 'fluidcad/core';
import { circle, vLine, tArc } from 'fluidcad/core';

const profile = sketch("top", () => {
    circle(40)
    circle(20)
})

const spine = sketch("front", () => {
    vLine(100)
    tArc(50, 180)
    tArc(80, -270)
})

sweep(spine, profile)

Sweep along a curved path

The first argument is the path (spine), the second is the profile to sweep. The profile and path should be on different planes.

Thin sweep​

.thin() offsets the profile edges to create a thin-walled swept shell — useful for pipes and ducts:

import { sketch, sweep } from 'fluidcad/core';
import { circle, vLine, tArc } from 'fluidcad/core';

const profile = sketch("top", () => {
    circle(40)
})

const spine = sketch("front", () => {
    vLine(100)
    tArc(50, 180)
    tArc(80, -270)
})

sweep(spine, profile).thin(5)

Thin sweep

sweep(spine, profile).thin(5)     // 5 units outward
sweep(spine, profile).thin(-5)    // 5 units inward
sweep(spine, profile).thin(5, -3) // dual offset

Open profiles​

Thin sweep also works with open profiles. The ends are capped — select them with capFaces() / capEdges():

import { sketch, sweep } from 'fluidcad/core';
import { line, vLine, tArc } from 'fluidcad/core';

const profile = sketch("top", () => {
    line([-30, 0], [30, 0])
})

const spine = sketch("front", () => {
    vLine(100)
    tArc(50, 180)
})

sweep(spine, profile).thin(5).new()

Thin sweep — open profile

Accessing geometry​

const s = sweep(spine, profile)

s.endFaces()       // face at the end of the path
s.startFaces()     // face at the start of the path
s.sideFaces()      // the swept surface(s)
s.endEdges()       // edges at the end
s.startEdges()     // edges at the start
s.sideEdges()      // edges along the sides
s.internalFaces()  // internal faces (if profile has holes)
s.internalEdges()  // internal edges
s.capFaces()       // cap face(s) of a thin sweep (open profile)
s.capEdges()       // cap edges of a thin sweep (open profile)

Fusion scope​

sweep(spine, profile).new()    // create a separate solid
sweep(spine, profile).add()    // fuse with touching solids (default)
sweep(spine, profile).remove()     // subtract from all intersecting solids
sweep(spine, profile).remove().scope(box)  // subtract only from the box