Curve Grid and Tuning

CurveGrid is the advanced interpolation structure behind the tuner workflow.

Data model

A grid stores:

n, which defines the angular sampling resolution
a flat list of TwoCubics masters

GetMaster() applies symmetry rules so a smaller set of stored masters can represent a larger effective angle domain.

Interpolation

GetInterp(th0, th1) maps angles into the grid, locates the surrounding master entries, and bilinearly interpolates the six stored TwoCubics coefficients.

Tuning loop

The tuner workflow uses that interpolation in three ways:

immediate preview of the interpolated curve under the pointer
direct editing of selected master curves
curvature-map generation across the sampled angle domain

This makes the tuner a research and calibration tool rather than part of the basic package-consumer workflow.