OpenSCAD utility library
use <bartscad/wrap.scad>
wrap_cylinder(r, h, depth, center=false, range=[0,360]);
wrap_cylinder takes 2D objecs as children and "wraps" them around a cylinder with radius r and height h.
The parameter depth determines the thickness of the wrapped object, going inwards from radius r.
The center parameter behaves like in the cylinder build-in module.
If only part of a cylinder shall be wrapped, range can be specified as [<starting angle>, <end angle>], reducing the angle improves performance.
wrap_cylinder takes the special variable $fa or $fn into account ($fs is not supported yet, pull requests are welcome).
The area wrapped around the cylinder is the rectangle (0, 0) to (h, 2 * PI * r), with smaller width depending on range.
For an example, see test.scad.
use <bartscad/poly.scad>
poly([ [0,0], chamfer([100,0], 20), [100, 100], fillet([0,100], 20) ]);
poly([
[20,0], [20,60], [40,60], [40,0],
[0,20], [60,20], [60,40], [60,0],
], [
[0,1,fillet(2, 10),3],
[chamfer(4, 10), 5, 6, 7],
]);
poly is a drop-in replacement for the builtin module polygon with support for chamfers and fillets.
If specifying only points, just replace a point with a chamfer or fillet function with the point and radius or distance to corner as parameters to apply it to that corner.
When working with paths, provide the points as usual and use the chamfer and fillet functions on the point indices provided in the paths parameter.
use <bartscad/stack.scad>
stack([10,["center", 3], ["top", 10]]){
difference(){
circle(d=10);
layer([0,"top"]) circle(d=5);
}
}
stack linear_extrudes its children in multiple layers stacked on top of each other.
As an argument, an array containing the layers (from bottom to top) must be provided.
Layers are specified as <height> or [<label>, <height>].
Children can be limited to specific layers by wrapping them in the layer module which takes a layer index, a layer label or an array of indices and or labels as argument.
The above example renders a cylinder with circular indents on either end.