Extruding make(NonPlanar)Face

[siquus]

Hi and thanks for the library!

I am using your library for my hello world to CAD. If have two questions:

• How can I extrude a face created with makeFace() or makeNonPlanarFace()? The only workaround I can think of is to create the same face at an offset, close off the sides with additional faces and then apply makeSolid() - or am I missing some obvious function?
• Can I invert the orientation of a make[NonPlanar]Face()? E.g. when I apply mirror on, say, a half-sphere, I would like the now complete sphere to have orientation pointing all outward.

Thanks!

[siquus]

In the code below, I am trying to make the boat hollow inside and from what I understand adding .shell(2, (f)=>f.parallelTo("XY")) to the return should do the trick but it doesn't ?

const defaultParams = {};

/** @typedef { typeof import("replicad") } replicadLib */
/** @type {function(replicadLib, typeof defaultParams): any} */

function main({ Sketcher, makeBezierCurve, makeLine, assembleWire, makeNonPlanarFace, makeFace, makeOffset, makeSolid, extrude
}, { }) {

    // Function to create a Semi-Displacement Hull
    function hull(
        height, length, width,
        bowUpperLowerFraction, bowUpperIncliniation, bowLowerInclination,
        keelWidth) {

        const keelPt0 = [0, 0, height];
        const keelPt1 = [keelPt0[0] + bowUpperLowerFraction * height * bowUpperIncliniation, 0, (1.0 - bowUpperLowerFraction) * height];
        const keelPt2 = [keelPt1[0] + (1.0 - bowUpperLowerFraction) * height * bowLowerInclination, 0, 0];
        const keelPt3 = [length, 0, keelPt2[2]];
        const keelPt4 = [length, 0, keelPt1[2]];

        const keelExtrusionPt0 = [keelPt1[0], 0, keelPt1[2]];
        const keelExtrusionPt1 = [length / 2, keelWidth / 2, keelPt1[2]];
        const keelExtrusionPt2 = [length, 0, keelPt1[2]];
        const keelExtrusionPt3 = [length, keelWidth / 2, keelPt1[2]];
        const keelExtrusionPt4 = [length / 2, keelWidth / 2, keelPt1[2]];

        const lowerKeelW1 = makeBezierCurve([keelPt1, keelPt2, keelPt3]);
        const lowerKeelW2 = makeLine(keelPt3, keelExtrusionPt3);
        const lowerKeelW3 = makeBezierCurve([keelExtrusionPt3, keelExtrusionPt4, keelPt1]);

        const lowerKeelAftW1 = makeLine(keelPt3, keelExtrusionPt2);
        const lowerKeelAftW2 = makeLine(keelExtrusionPt2, keelExtrusionPt3);
        const lowerKeelAftW3 = lowerKeelW2;

        const lowerKeel = makeNonPlanarFace(assembleWire([lowerKeelW1, lowerKeelW2, lowerKeelW3]));
        const lowerKeelMirror = makeNonPlanarFace(assembleWire([lowerKeelW1, lowerKeelW2, lowerKeelW3])).mirror("XZ");

        const lowerkeelAft = makeFace(assembleWire([lowerKeelAftW1, lowerKeelAftW2, lowerKeelAftW3]));
        const lowerkeelAftMirror = makeFace(assembleWire([lowerKeelAftW1, lowerKeelAftW2, lowerKeelAftW3])).mirror("XZ");

        const lowerkeelTop = makeFace(assembleWire([lowerKeelW3, makeLine(keelPt1, keelExtrusionPt2), makeLine(keelExtrusionPt2, keelExtrusionPt3)]));
        const lowerkeelTopMirror = makeFace(assembleWire([lowerKeelW3, makeLine(keelPt1, keelExtrusionPt2), makeLine(keelExtrusionPt2, keelExtrusionPt3)])).mirror("XZ");

        return makeSolid([
            lowerKeel, lowerKeelMirror,
            lowerkeelAft, lowerkeelAftMirror,
            lowerkeelTop, lowerkeelTopMirror]);
    }

    return hull(50, 150, 90, 0.8, 0.8, 1.5, 30);
}

[sgenoud]

Mmm I had a look at this, not sure why (I need to have a deeper look, but I don't have time today).

Don't hesitate to create multiple questions - it should make it easier for others to find answers!

[sgenoud]

ow can I extrude a face created with makeFace() or makeNonPlanarFace()? The only workaround I can think of is to create the same face at an offset, close off the sides with additional faces and then apply makeSolid() - or am I missing some obvious function?

You can use the lower level extrusion functions:

 basicFaceExtrusion(face, new Vector([0, 0, 2]));

I have applied it to part of your model in that way here and it looks nice:

[sgenoud]

Can I invert the orientation of a make[NonPlanar]Face()? E.g. when I apply mirror on, say, a half-sphere, I would like the now complete sphere to have orientation pointing all outward.

There is no method exposed at the high level - but you can use the open cascade one directly

  reversed.wrapped.Reverse()

Have a look here

[siquus]

Thanks so much - just in time for the weekend :-)