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Fillet

fillet() rounds edges with a given radius, creating smooth transitions between faces.

const e = extrude(30)
fillet(5, e.endEdges())        // round the top edges, radius 5
fillet(3, e.startEdges())      // round the bottom edges, radius 3

Targeting edges​

Pass specific edges as the second argument:

fillet(5, e.endEdges())        // top edges of the extrude
fillet(3, e.sideEdges())       // side edges
fillet(2, c.internalEdges())   // internal edges from a cut

Using the last selection​

If you don't specify edges, fillet() targets the last select() result:

import { select } from 'fluidcad/core';
import { edge } from 'fluidcad/filters';

select(edge().verticalTo("xy"))
fillet(5)                      // fillets the selected vertical edges

2D fillet​

fillet() also works inside sketches to round corners between lines:

sketch("xy", () => {
    polygon(5, 100)
    fillet(10)                 // round all corners of the polygon
})