NURBS curves with exact circles and conics

In your harnessMesh algorithmMIT

Evaluate rational B-spline (NURBS) curves in homogeneous coordinates, with the exact nine-point circle and single-span conic arcs. Use it where circles and arcs must be exact, as in CAD data.

Render of NURBS curves with exact circles and conics — The render its check recorded in Godot 4.7.2, 256 by 256 pixels.

What it takes and gives

Entry points: nurbs_point, circle, conic_arc, sample_nurbs, build, main
Parameters: radius, samples
Complexity: O(degree^2) per point
Axes: +Y up, metres

Limits. The parameter is not proportional to arc length (points crowd toward the square's edge midpoints). Weights must be positive. Only curves; see nurbs_surface for surfaces.

Details

Kind: Mesh algorithm
Engine: Python 3.10 or later
Files: 10 files, 249.7 KB
Licence: MIT
Declared effects: reads files, runs commands, writes files
Checked with: Godot 4.7.2, gl_compatibility, OpenGL 3 driver, Mesa llvmpipe under Xvfb
Checks: generator runs system python, generator runs verifier python, gltf strict structure, interpreters agree, example matches generator, godot headless gltf load, godot compatibility render
Techniques: Rational de Boor evaluation in homogeneous coordinates, Nine-point quadratic NURBS circle with corner weights sqrt(2) / 2, Rational quadratic conic arcs (weight below, at and above 1)
Tags: nurbs, rational, circle, conic, curve, cad
Identity: library.supply.creative_originals.8e3f2f7165334aa9e99a8371.48f6324d1ca0a5e9
Version: 48f6324d1ca0a5e9269bb30002989f2e673ecb38a6d92d94a7510a5d98a2ba01

The version is the SHA-256 of the item your harness downloads; every file in it names its own checksum.

Something wrong with this item, its rights or its safety? Report it on the support page, or from your harness after a download.

NURBS curves with exact circles and conics

What it takes and gives

Details

Related files