How to use the sweepSketch method

[raydeleu]

The .sweepSketch method in Replicad can be used to sweep a cross section along a path. The example below shows two ways how the method can be applied.

The wavy inner part is created by sweeping a rectangle along an open (i.e. non-closed) bezier curve. Note that it is necessary to define the cross section in such a way that the plane and origin where the cross section should be placed can be derived from the path. The command is:

let baseShape = basePath.sweepSketch((plane, origin) => 
                sketchRectangle(2, 30, { plane, origin }));

The outer part of the shape is created by sweeping a rather complicated cross section, created by a sketch, along a rounded rectangle. To make this work the sketch of the cross section has to be defined as a function with parameters plane and origin. The shape is then created using the call:

let topSweep   = topPath.sweepSketch((plane, origin) => topSection(plane,origin)); 

The complete code for the example is shown below the image.

const main = (
  { Sketcher, sketchRectangle, sketchRoundedRectangle },
  {}
) => {
  let p0 = [0, 0];
  let p1 = [50, 100];
  let p2 = [60, -110];
  let p3 = [70, 50];
  let p4 = [100, 25];
  let points = [p1, p2, p3, p4];

// create wavy path
let basePath = new Sketcher("XZ")
    .movePointerTo(p0)
    .bezierCurveTo(p4, points)
    .done()

// sweep a rectangle along the wavy path
let baseShape = basePath.sweepSketch((plane, origin) => 
                sketchRectangle(2, 30, { plane, origin }));

// create a path consisting of rounded rectangle
let topPath = sketchRoundedRectangle(110,30,5,{plane:"XY",origin:[50,0,26]})

// create an L-shaped cross section
function topSection(plane,origin) 
{let section = new Sketcher(plane,origin)
    .hLine(10)
    .vLine(-5)
    .hLine(-8)
    .vLine(-26)
    .hLine(-2)
    .close()
  return section
}  

// sweep the L-shaped cross section along the rounded rectangle
let topSweep   = topPath.sweepSketch((plane, origin) => topSection(plane,origin));

// fuse the two shapes together to display them
return baseShape.fuse(topSweep)
};