pub fn chart_grid_parameters(divisions: usize) -> Vec<f64>Expand description
The interior grid of a chart square, in the chart coordinate s (or t).
A chart spans 90° each way and its coordinate is the TANGENT of the angle, so
equal angle steps — the thing a chord tolerance actually constrains — are
tan of a uniform division, not a uniform division. Interior points are free
(no other chart reads them), so this list is independent of
cube_edge_parameters; sizing both from the same angular step is what keeps
the triangles the same size on either side of a chart boundary.