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Curve Grid and Serialization

CurveGrid is the package structure used to store and interpolate a sampled family of TwoCubics masters.

What it stores

  • N: the angular sampling density
  • Masters: the canonical list of stored TwoCubics values

Symmetry handling

The grid does not need to store every angular quadrant explicitly. GetMaster(i, j) maps requests through symmetry operations:

  • horizontal flip
  • vertical flip
  • 180-degree turn

Interpolation

GetInterp(th0, th1):

  1. maps angles to grid coordinates
  2. finds the surrounding master samples
  3. bilinearly interpolates the six stored coefficients

JSON round-tripping

The tuner workflow persists grids with:

  • CurveGrid.ToJson()
  • CurveGrid.FromJson(string json)

This makes it practical to save calibration data, compare tuned master sets, and ship interpolated curve families independently of the UI.