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Using Spline

Spline is the NuGet package published from this repository. It exposes the reusable spline engine without bringing the Avalonia UI layer along with it.

Package and namespace

  • NuGet package ID: Spline
  • Assembly: Spline.dll
  • Public namespace: Spline

The package, assembly, and public namespace are aligned as Spline. Because the namespace and the main spline type now share the same identifier, an alias such as using SplinePath = global::Spline.Spline; keeps consumer code clear.

Included responsibilities

  • vector math through Vec2
  • Bezier helpers such as BezierPath and CubicBezier
  • spline solving through Spline, TwoParamCurve, and TwoParamSpline
  • curve-grid interpolation through CurveGrid and TwoCubics
  • headless polyline simplification with PolylineUtils

Excluded responsibilities

  • application settings persistence
  • Avalonia windows, views, and interaction logic
  • demo-specific editing and visualization behavior

Packaging model

The package is built from src/Spline/Spline.csproj and includes both a NuGet package and a symbol package during dotnet pack.

Typical consumer flow

using Spline;
using SplinePath = global::Spline.Spline;

var controlPoints = new[]
{
    new SplinePath.CP(new Vec2(0, 0), "corner", null, null),
    new SplinePath.CP(new Vec2(60, 20), "smooth", null, null),
    new SplinePath.CP(new Vec2(120, 0), "corner", null, null),
};

var spline = new SplinePath(controlPoints, isClosed: false);
spline.Solve();
spline.ComputeCurvatureBlending();

BezierPath path = spline.Render();
string svg = path.ToSvgPath();

When to use DemoSpline instead

Reach for samples/DemoSpline when you need:

  • interactive editing and tangent manipulation
  • freehand tracing and curve fitting validation
  • tuner-based exploration of CurveGrid and TwoCubics
  • live confirmation that a package change still behaves as expected