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KevoyuanKevoyuan/AgentSCAD/skills/scad-library-round-anything/SKILL.md

scad-library-round-anything

Skill26 starsChanged 5 months agoMITView on GitHub

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.

The file

Show its rules and text

We split this skill into the rules it gives an agent

14 rules. About 0 are common, 8 are distinctive, and 6 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈8

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 6

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Very specific:

    Use Round-Anything when the runtime prompt lists use <Round-Anything/polyround.scad> or use <polyround.scad> and the requested part is …

    line 13
  2. Distinctive:

    Use the exact include/use statement shown by the runtime prompt.

    line 17
  3. Very specific:

    Use polyRound() for rounded polygons instead of manually approximating rounded corners.

    line 31
  4. Very specific:

    Use polyRoundExtrude() for rounded plates, brackets, tabs, bezels, lips, and soft rectangular profiles.

    line 32
  5. Very specific:

    Use shell2d() patterns for open shells and wall outlines when the part is sketch-driven.

    line 33
  6. Distinctive:

    Use rounded profiles for stress relief and visual polish.

    line 34
  7. Very specific:

    Prefer Round-Anything over minkowski() for complex 2D outlines that need controlled corner radii.

    line 35
  8. Distinctive:

    Keep each radius less than half the adjacent segment length.

    line 62
  9. Distinctive:

    Use smaller radii on tabs, clips, and screw ears than on cosmetic outer corners.

    line 63
  10. Distinctive:

    Prefer a simple rounded profile plus boolean cutouts over many nested hull operations.

    line 64
  11. Distinctive:

    Keep profile arrays readable and derived from top-level parameters.

    line 65
  12. Very specific:

    Do not use minkowskiRound by default.

    line 69
  13. Distinctive:

    Do not use Round-Anything for pure cylinders or simple cuboids if BOSL2 can express the shape more clearly.

    line 70
  14. Distinctive:

    Do not copy library source into generated SCAD.

    line 71

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

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.

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