scad-library-round-anything

name	scad-library-round-anything
description	This skill should be used when generating OpenSCAD with Round-Anything, polyRound, polyRoundExtrude, shell2d, rounded sketch profiles, filleted extrusions, beams, tabs, brackets, and consumer-product-style softened parts.
triggers	["use round anything","polyround","rounded sketch","filleted extrusion"]

SCAD Library Round-Anything Skill

Use Round-Anything when the runtime prompt lists use <Round-Anything/polyround.scad> or use <polyround.scad> and the requested part is naturally built from rounded 2D sketches extruded into 3D.

Import

Use the exact include/use statement shown by the runtime prompt. Common forms are:

use <Round-Anything/polyround.scad>

or:

use <polyround.scad>

Best Uses

• Use polyRound() for rounded polygons instead of manually approximating rounded corners.
• Use polyRoundExtrude() for rounded plates, brackets, tabs, bezels, lips, and soft rectangular profiles.
• Use shell2d() patterns for open shells and wall outlines when the part is sketch-driven.
• Use rounded profiles for stress relief and visual polish.
• Prefer Round-Anything over minkowski() for complex 2D outlines that need controlled corner radii.

Generation Pattern

Represent profile points as [x, y, radius] and keep radii parameterized:

use <Round-Anything/polyround.scad>

/* [Profile] */
width = 70;          // min: 20 max: 180 step: 1
depth = 42;          // min: 15 max: 120 step: 1
thickness = 5;       // min: 1.2 max: 20 step: 0.5
corner_radius = 5;   // min: 0 max: 20 step: 0.5

profile = [
  [-width/2, -depth/2, corner_radius],
  [ width/2, -depth/2, corner_radius],
  [ width/2,  depth/2, corner_radius],
  [-width/2,  depth/2, corner_radius],
];

polyRoundExtrude(profile, thickness, corner_radius, corner_radius, fn=32);

Quality Rules

• Keep each radius less than half the adjacent segment length.
• Use smaller radii on tabs, clips, and screw ears than on cosmetic outer corners.
• Prefer a simple rounded profile plus boolean cutouts over many nested hull operations.
• Keep profile arrays readable and derived from top-level parameters.

Avoid

• Do not use minkowskiRound by default; it is slow and fragile for generated models.
• Do not use Round-Anything for pure cylinders or simple cuboids if BOSL2 can express the shape more clearly.
• Do not copy library source into generated SCAD.